CN114196953A - Method for increasing surface pulse plasma electric spark alloying depth of metal part - Google Patents
Method for increasing surface pulse plasma electric spark alloying depth of metal part Download PDFInfo
- Publication number
- CN114196953A CN114196953A CN202111581485.4A CN202111581485A CN114196953A CN 114196953 A CN114196953 A CN 114196953A CN 202111581485 A CN202111581485 A CN 202111581485A CN 114196953 A CN114196953 A CN 114196953A
- Authority
- CN
- China
- Prior art keywords
- electrode
- workpiece
- metal part
- alloying
- depth
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Images
Classifications
-
- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
- C23C26/00—Coating not provided for in groups C23C2/00 - C23C24/00
- C23C26/02—Coating not provided for in groups C23C2/00 - C23C24/00 applying molten material to the substrate
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23H—WORKING OF METAL BY THE ACTION OF A HIGH CONCENTRATION OF ELECTRIC CURRENT ON A WORKPIECE USING AN ELECTRODE WHICH TAKES THE PLACE OF A TOOL; SUCH WORKING COMBINED WITH OTHER FORMS OF WORKING OF METAL
- B23H1/00—Electrical discharge machining, i.e. removing metal with a series of rapidly recurring electrical discharges between an electrode and a workpiece in the presence of a fluid dielectric
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Other Surface Treatments For Metallic Materials (AREA)
Abstract
The invention relates to a method for increasing the surface pulse plasma electric spark alloying depth of a metal part, which comprises the following steps: the method comprises the following steps: the workpiece material is ferritic, pearlitic and/or austenitic steel; step two: before the workpiece in the step one is processed, the initial roughness of the surface is Ra0.1-1.6 μm; step three: the electrode is connected with a plasma pulse generator through a vibrator, and when the electrode works, the electrode vibrates to generate pulse plasma electric spark discharge with a workpiece, so that an electrode material is transferred to the surface of the workpiece, and meanwhile, a self-propagating high-temperature synthesis reaction is generated, and an alloying process is completed; step four: the relative moving speed between the workpiece and the electrode is 0.1 m/min to 1m/min during processing; no electrolyte is arranged between the electric spark electrode and the machined surface; step five: for the workpiece material in the step one, the used electrode is a tubular electrode or a flux-cored wire with powder filler, the shell material of the tubular electrode or the flux-cored wire is titanium alloy, the powder filler is graphite, boron, silicon or a mixture thereof, and the particle size is less than 25 μm; after the surface layer treatment is carried out by the method, the wear resistance of the metal part is obviously improved.
Description
Technical Field
The invention belongs to the technical field of electro-physics and electrochemical machining, and particularly relates to a method for increasing the surface pulse plasma spark alloying depth of a metal part.
Background
One method for forming a wear-resistant layer on the surface of a titanium or titanium alloy part is known [ patent RU 2621750C 2: one method for forming a wear-resistant layer on the surface of a titanium or titanium alloy part. The inventor provides Ovcharenko P.G., Leshchev A.Yu. B23N 1/00, 07.06.2017 ]. The invention relates to the field of mechanical engineering, in particular to a method for coating a coating by electric spark alloying. The method performs machining by electric spark alloying with various specifications. The surface of the workpiece to be hardened is pretreated, and a layer of carbon-based material is coated on the surface of the workpiece by paint or adhesive, wherein the thickness of the carbon-based material is at least 0.01 mm.
The invention can form a titanium carbide layer or a titanium nitride layer on the surface of the titanium or titanium alloy part, thereby improving the surface hardness. Because the electric spark alloying process is initiated by discharge and is also carried out according to a self-propagating high-temperature synthesis mechanism, the process can be carried out in different electric spark alloying modes and devices.
The above method has disadvantages in that only the surface of titanium or titanium alloy can be treated, and the carbon-based material needs to be coated on the surface of the workpiece in advance.
② to eliminate the above-mentioned disadvantages, a method of obtaining a coating by electric spark alloying [ patent RU 2228824C 2: electric spark build-up welding electrode metal core, a manufacturing method thereof, and a coating method of a superabrasive coating can be used. The inventors Koizumi m., Kudryashov a.e., Levashov e.a., Nikolaev a.g., Okhyanagi m., Hosomi s.b 22F3/00, B23H 9/00.20.05.2004. The electrode metal core comprises two components, wherein the first component is formed by uniformly mixing and pressing powder and comprises one element of Fe, Co and Ni, and metal elements of IVA, VA and VIA groups in the periodic table of elements and Si element; the second component participates in self-propagating high-temperature synthesis reaction, and generates carbide, nitride, boride, silicide or intermetallic compound together with the first component in the electric spark alloying process. The electrode metal core may also contain a hard material that does not participate in the self-propagating high temperature synthesis reaction, such as diamond. The spark discharge between the electrode core and the workpiece transfers the alloy constituents to the workpiece surface, and the resulting coating contains at least one desired compound. Since the self-propagating high temperature synthesis reaction releases heat, discharge energy can be saved in the process.
The disadvantage of this method is that it is mainly applied for surface coating, not for alloying metal surfaces.
The closest to the described method in terms of technical essence (prototype) is the method of local strengthening of the metal surface. [ US 2016.0017450A1: Localized hardening of metallic surfaces ]/Localized hardening of metal surfaces. The inventor has Kislov V, Kislov S.C 2ID 6/02, B23H I/06.21.01.2016. The invention relates to a method and a system for treating a metal surface. In this case, the workpiece material is predominantly ferritic, pearlitic and/or austenitic steel, and a thin layer with a martensitic microstructure can be formed on the workpiece surface by the proposed method. The initial roughness of the surface of the workpiece before processing is Ra0.1-1.6 mu m; the relative moving speed between the workpiece and the electrode is 0.1 m/min to 1m/min during processing; no electrolyte is present between the spark electrode and the machined surface; serpentine and quartz can be added as auxiliary materials to the workpiece surface.
The disadvantage of this method is that the depth of the treated layer is relatively small and if the depth of the hardened layer is to be increased, the energy of the spark must be increased, which increases the surface roughness after machining.
In view of the above technical problems, improvements are needed.
Disclosure of Invention
The invention overcomes the defects in the prior art and provides a method for increasing the surface pulse plasma spark alloying depth of metal parts; after the surface treatment is carried out by the method, the wear resistance of the metal part is obviously improved.
In order to achieve the above purposes, the technical scheme adopted by the invention is as follows: a method for increasing the surface pulse plasma electric spark alloying depth of a metal part comprises the following steps:
the method comprises the following steps: the workpiece material is mainly ferrite, pearlite and/or austenitic steel;
step two: before the workpiece in the first step is machined, the initial surface roughness is Ra0.1-1.6 mu m;
step three: the electrode is connected with a plasma pulse generator through a vibrator, and when the electrode works, the electrode vibrates to generate pulse plasma electric spark discharge with a workpiece, so that an electrode material is transferred to the surface of the workpiece, and meanwhile, a self-propagating high-temperature synthesis reaction is generated, and an alloying process is completed;
step four: the relative moving speed between the workpiece and the electrode is 0.1 m/min to 1m/min during processing, and no electrolyte exists between the electric spark electrode and the processing surface;
step five: and (3) regarding the workpiece material in the step one, the electrode used is a tubular electrode or a flux-cored wire with a powder filler, the shell material of the tubular electrode or the flux-cored wire is a titanium alloy, the powder filler is graphite, boron, silicon or a mixture thereof, and the particle size is less than 25 microns.
In a preferable embodiment of the present invention, in the third step, the frequency of the spark discharge of the pulsed plasma electric is 100-1000 Hz.
In a preferred embodiment of the present invention, in the first step, the workpiece material may be a nickel alloy and a titanium alloy, in this case, the shell material of the tubular electrode or the flux-cored wire in the fifth step is aluminum or an aluminum alloy, and the powder filler is a mixture of one powder of graphite, boron, and silicon and another powder (chromium, tungsten, vanadium, molybdenum, niobium, and titanium powder).
In a preferred embodiment of the present invention, in the first step, the workpiece material may also be an aluminum alloy, in this case, the shell material of the tubular electrode or the flux-cored wire in the fifth step is a nickel alloy or a titanium alloy, and the powder filler is a mixture of a series of metal powders of chromium, tungsten, vanadium, molybdenum, niobium, titanium, and the like, and a series of non-metal powders of graphite, boron, silicon, and the like.
As a preferred embodiment of the invention, the powder filler may comprise scandium powder or a mixture of scandium and an aluminium alloy, the total content of scandium in the powder filler being 0.5-5.0 wt%.
As a preferred aspect of the present invention, the mixed metal powder may include cerium iron, and the total content of cerium in the powder filler is in the range of 1.5 to 3.5 wt%.
In a preferred embodiment of the present invention, the plasma spark alloying may be performed in a single pass or multiple passes, and the energy of the plasma spark discharge is reduced by 30-50% in each subsequent pass compared to the previous pass.
In a preferable mode of the invention, in the third step, when the electrode moves relative to the workpiece, the electrode vibrates vertically to the hardened surface, the vibration frequency is 1-100Hz, and the amplitude is 0.05-0.50 mm.
The invention has the beneficial effects that:
the core of the invention is to create a method for increasing the depth of a treatment layer when the surface of a metal part is subjected to pulse plasma electric spark alloying treatment; after the surface layer treatment is carried out by the method, the wear resistance of the metal part is obviously improved.
Drawings
Fig. 1 is a schematic diagram of the principle of the present invention.
In the figure, 1-pulse generator 2-workpiece 3-electrode (tubular electrode/flux-cored wire) 4-vibrator
FIG. 2 is a specific apparatus for testing the effectiveness of the present invention;
FIG. 3 is a surface topography of a sample treated in accordance with the present invention;
fig. 4 is an apparatus for testing the abrasion resistance of a sample of the present invention.
In the figure, 5-alloyed workpiece 6-counter friction pair 7-load.
Detailed Description
The technical scheme of the invention is clearly and completely described below by combining the attached drawings. It is to be understood that the described embodiments are merely exemplary of the invention, and not restrictive of the full scope of the invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
In the description of the present invention, it should be noted that unless otherwise explicitly stated or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; either directly or indirectly through intervening elements, or may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.
The invention aims to provide a method for increasing the surface pulse plasma electric spark alloying depth of metal parts, wherein the workpiece material is ferrite, pearlite and/or austenitic steel, and the initial roughness of the surface of the workpiece before processing is Ra0.1-1.6 mu m; the electrode is connected with a plasma pulse generator through a vibrator, and when the electrode works, the electrode vibrates to generate pulse plasma electric spark discharge with a workpiece, so that an electrode material is transferred to the surface of the workpiece, and meanwhile, a self-propagating high-temperature synthesis reaction is generated, and an alloying process is completed; the relative moving speed between the workpiece and the electrode is 0.1 m/min to 1m/min during processing; no electrolyte is arranged between the electric spark electrode and the surface to be processed; the used electrode is a tubular electrode or a flux-cored wire with powder filler, the shell material of the tubular electrode or the flux-cored wire is titanium alloy, the powder filler is graphite, boron, silicon or a mixture thereof as the filler, and the particle size is not more than 25 mu m; the frequency of the spark discharge of the pulse plasma is 100-1000 Hz.
The metal material which can be processed by plasma electric spark alloying can be nickel-based alloy and titanium-based alloy, in this case, the shell material of the tubular electrode or the flux-cored wire is aluminum or aluminum alloy, and the powder filler is a mixture of one powder of graphite, boron and silicon and another powder (chromium, tungsten, vanadium, molybdenum, niobium and titanium powder).
Plasma spark alloying can also be used to treat aluminum alloy workpieces, where the shell of the tubular electrode or flux-cored wire is made of nickel and titanium, and the powder filler is a mixture of metal powder (chromium, tungsten, vanadium, molybdenum, niobium, titanium powder) and a series of non-metal powders such as graphite, boron, silicon, etc.
The powder filler powder can contain scandium powder or mixed powder of scandium and aluminum alloy, and the total content of scandium in the mixed powder is 0.5-5.0 wt%. The powder filler may also contain rare earth elements, such as cerium iron, with the total cerium content in the powder filler being in the range of 1.5-3.5 wt%.
The plasma spark alloying process may be performed in a single pass or in multiple passes, and in each subsequent pass the energy of the plasma spark discharge is reduced by 30-50% compared to the previous pass. When the electrode moves relative to the workpiece, the electrode vibrates perpendicularly to the hardened surface, the vibration frequency is 1-100Hz, and the amplitude is 0.05-0.50 mm.
In particular, the nature of the method of the present invention is shown in FIG. 1.
The invention provides a method for increasing the surface pulse plasma spark alloying depth of a metal part, which comprises the following steps: the metal workpiece 2 is connected to a lead wire of the pulse generator 1, and the electrode 3 is fixed in an electrode holder of the vibrator 4 and connected to another lead wire of the pulse generator 1. During alloying, the electrode moves along the surface of the workpiece to be hardened at the speed of 0.1 m/min to 1 m/min. In this case, the electrode 3 is vibrated perpendicularly to the surface to be hardened by the action of the vibrator 4 at a frequency of 1 to 100Hz and an amplitude of 0.1 to 0.5mm, resulting in spark discharge between the workpiece 2 and the electrode 3.
The results obtained according to the proposed method are as follows.
A tubular electrode or flux-cored wire with a powder charge is fixed as electrode 3 in the electrode holder of the vibrator 4. The sheath material of the tubular electrode or flux-cored wire and the powder filler must ensure that the self-propagating high-temperature synthesis reaction proceeds and forms intermetallic compounds (e.g., compounds such as TiFe, TiNi, FeAl, TiAl, etc.) and compounds of the type such as carbides, borides, silicides, etc. with the base material of the workpiece 2. The flux-cored wire is continuously fed from the wire reel according to the consumption progress of the flux-cored wire, the continuity of the alloying process is ensured, and the depth of a hardened layer in the pulse plasma electric spark alloying process is increased through self-propagating high-temperature synthesis reaction. Alloying the surface of the aluminum alloy, and forming a structure with high hardness and low brittleness when the powder filler contains scandium; the powder filler, when mixed with a rare earth (e.g., cerium iron), forms a nanocrystalline structure. In addition, due to the thermal action of spark discharges at a frequency of 100-1000Hz, a martensitic microstructure is formed during the alloying of the ferritic and/or pearlitic steel surface. Meanwhile, in the case of using the graphite electrode 3, carbide is formed in the alloyed region of the workpiece 2; and if the workpiece 2 is a titanium alloy, self-propagating high temperature synthesis reaction also occurs.
The effectiveness of the proposed method was checked by performing electric spark alloying experiments using a dedicated device (fig. 2). The sample material was 35NiCrMoV12-5 steel, the dimensions being as long as 50X 20 mm. Alloying is carried out on the cylindrical surface of 50mm in the middle: the first energy was 6.8J and the second 3.4J. The two alloying runs were carried out at 4-6 r/min, during which the vibrator electrode cartridge was held manually. The surface of the alloyed sample is shown in fig. 3. After alloying, the samples were tested for wear resistance using a bench made by a lathe (fig. 4). An alloyed sample 5 was fixed to a three-jaw chuck of a lathe, on top of which a counter friction pair 6 (material-P10 (ISO cemented carbide designation, composition 79% WC + 15% TiC + 6% Co) with a constant load 7 was mounted, the alloyed sample 5 was rotated at a speed of about 500mm/s under a load of 1.3 MPa, and a dry friction test was performed for one hour with the counter friction pair 6, and the wear resistance (unit: g/h) was evaluated from the wear rate obtained by the test of the alloyed sample 5, the wear rate being an average of three measurements.
According to the prototype method, using WC-Co type electrodes made of K30 (ISO cemented carbide grade, composition: 92% WC +8% Co) material for spark-alloying, a martensitic structure with a depth of up to 0.30 mm was obtained in the near-surface layer, with a wear rate of 0.60 g/h. According to the proposed method, a tubular electrode with graphite filler and TA1 titanium alloy sheath is used, obtaining a martensitic structure with a depth of up to 0.45mm, a high carbide content and TiFe intermetallic compounds in the near-surface layer, with an abrasion rate of 0.30 g/h.
The result shows that compared with the prototype method, the method for increasing the depth of the metal part by the pulse plasma electric spark alloying can improve the wear resistance of the metal part by 1 time and increase the alloying depth by 50 percent.
The core task of the invention is to provide a method for increasing the pulse plasma spark alloying depth of the surface of a metal part; the method can be used for surface layer treatment, and the wear resistance of metal parts is obviously improved.
The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the invention; thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
Claims (8)
1. A method for increasing the surface pulse plasma electric spark alloying depth of a metal part is characterized in that: the method comprises the following steps:
the method comprises the following steps: the workpiece material is ferritic, pearlitic and/or austenitic steel;
step two: before the workpiece in the step one is processed, the initial roughness of the surface is Ra0.1-1.6 μm;
step three: the electrode is connected with a plasma pulse generator through a vibrator, and when the electrode works, the electrode vibrates to generate pulse plasma electric spark discharge with a workpiece, so that an electrode material is transferred to the surface of the workpiece, and meanwhile, a self-propagating high-temperature synthesis reaction is generated, and an alloying process is completed;
step four: the relative moving speed between the workpiece and the electrode is 0.1 m/min to 1m/min during processing, and no electrolyte exists between the electric spark electrode and the processing surface;
step five: for the workpiece material in the step one, the electrode used is a tubular electrode or a flux-cored wire with a powder filler, the shell material of the tubular electrode or the flux-cored wire is a titanium alloy, the powder filler is graphite, boron, silicon or a mixture thereof, and the particle size is not more than 25 μm.
2. The method of claim 1, wherein the step of increasing the depth of the pulse plasma electrical spark alloying of the surface of the metal part comprises the steps of: in the third step, the frequency of the spark discharge of the pulsed plasma is 100-1000 Hz.
3. The method of claim 1, wherein the step of increasing the depth of the pulse plasma electrical spark alloying of the surface of the metal part comprises the steps of: in the first step, the workpiece material may be nickel alloy and titanium alloy, at this time, the shell material of the tubular electrode or the flux-cored wire in the fifth step is aluminum or aluminum alloy, and the powder filler is a mixture of one powder of graphite, boron and silicon and another powder (chromium, tungsten, vanadium, molybdenum, niobium and titanium).
4. The method of claim 1, wherein the step of increasing the depth of the pulse plasma electrical spark alloying of the surface of the metal part comprises the steps of: in the first step, the workpiece material may also be an aluminum alloy, at this time, the shell material of the tubular electrode or the flux-cored wire in the fifth step is nickel and titanium, and the powder filler is a mixture of a series of metal powder such as chromium, tungsten, vanadium, molybdenum, niobium, titanium and the like and a series of non-metal powder such as graphite, boron, silicon and the like.
5. The method for increasing the depth of the pulse plasma electric spark alloying on the surface of the metal part as claimed in claim 1, 3 or 4, wherein: the powder filler may comprise scandium powder or a mixture of scandium and an aluminium alloy, the total content of scandium in the powder filler being between 0.5 and 5.0 wt%.
6. The method for increasing the depth of the pulse plasma electric spark alloying on the surface of the metal part as claimed in claim 1, 3 or 4, wherein: the mixed metal powder may include cerium iron, with the total cerium content of the powder filler being in the range of 1.5-3.5 wt%.
7. The method of claim 1, wherein the step of increasing the depth of the pulse plasma electrical spark alloying of the surface of the metal part comprises the steps of: the plasma spark alloying may be performed in a single pass or in multiple passes, and in each subsequent pass the energy of the plasma spark discharge is reduced by 30-50% compared to the previous pass.
8. The method of claim 1, wherein the step of increasing the depth of the pulse plasma electrical spark alloying of the surface of the metal part comprises the steps of: in the third step, when the electrode moves relatively to the workpiece, the electrode vibrates vertically to the hardened surface, the vibration frequency is 1-100Hz, and the amplitude is 0.05-0.50 mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111581485.4A CN114196953A (en) | 2021-12-22 | 2021-12-22 | Method for increasing surface pulse plasma electric spark alloying depth of metal part |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111581485.4A CN114196953A (en) | 2021-12-22 | 2021-12-22 | Method for increasing surface pulse plasma electric spark alloying depth of metal part |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN114196953A true CN114196953A (en) | 2022-03-18 |
Family
ID=80655952
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202111581485.4A Pending CN114196953A (en) | 2021-12-22 | 2021-12-22 | Method for increasing surface pulse plasma electric spark alloying depth of metal part |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN114196953A (en) |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6336950B1 (en) * | 1997-10-03 | 2002-01-08 | The Ishizuka Research Institute Ltd. | Electrode rod for spark deposition, process for the production thereof, and process for covering with superabrasive-containing layer |
| CN104411840A (en) * | 2012-02-15 | 2015-03-11 | 长寿工程公司 | Localized hardening of metallic surfaces |
| RU2588945C1 (en) * | 2015-03-23 | 2016-07-10 | Федеральное государственное бюджетное научное учреждение Всероссийский научно-исследовательский технологический институт ремонта и эксплуатации машинно-тракторного парка (ФГБНУ ГОСНИТИ) | Device for electric spark processing surfaces |
-
2021
- 2021-12-22 CN CN202111581485.4A patent/CN114196953A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6336950B1 (en) * | 1997-10-03 | 2002-01-08 | The Ishizuka Research Institute Ltd. | Electrode rod for spark deposition, process for the production thereof, and process for covering with superabrasive-containing layer |
| CN104411840A (en) * | 2012-02-15 | 2015-03-11 | 长寿工程公司 | Localized hardening of metallic surfaces |
| RU2588945C1 (en) * | 2015-03-23 | 2016-07-10 | Федеральное государственное бюджетное научное учреждение Всероссийский научно-исследовательский технологический институт ремонта и эксплуатации машинно-тракторного парка (ФГБНУ ГОСНИТИ) | Device for electric spark processing surfaces |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| Shunmugam et al. | Improvement of wear resistance by EDM with tungsten carbide P/M electrode | |
| JPH09192937A (en) | Surface treatment method by in-liquid discharge | |
| Liu et al. | Novel method to fabricate Ti–Al intermetallic compound coatings on Ti–6Al–4V alloy by combined ultrasonic impact treatment and electrospark deposition | |
| CN112281105B (en) | Metal ceramic composite coating and preparation method and application thereof | |
| JPH07197275A (en) | Surface treatment method for metallic materials by in-liquid discharge | |
| Kumari et al. | Ceramic-metal composite coating on steel using a powder compact tool electrode by the electro-discharge coating process | |
| Cheng et al. | Improvement in corrosion resistance of a nodular cast iron surface modified by plasma beam treatment | |
| JP4563318B2 (en) | Discharge surface treatment electrode, discharge surface treatment apparatus, and discharge surface treatment method | |
| Ivannikov et al. | The effect of electromechanical treatment on structure and properties of plasma sprayed Fe-6W-5Mo-4Cr-2V-C coating | |
| Uno et al. | Surface modification of EDMed surface with powder mixed fluid | |
| Xiao et al. | Titanium carbonitride coating by pulsed electrical discharge in an aqueous solution of ethanolamine | |
| Arun et al. | Synthesis of electrical discharge metal matrix composite coating through compacted semi-sintered electrode and its tribological studies | |
| Penyashki et al. | Structural and tribological properties of wear resistant coatings obtained by electrospark deposition | |
| Sundriyal et al. | Experimental Investigation of the Micro-hardness of EN-31 Die Steel in a Powder-Mixed Near-Dry Electric Discharge Machining Method. | |
| Roy | Solid particle erosion behavior of WC coating obtained by electrospark technique and detonation spraying | |
| JP3627784B2 (en) | Discharge surface treatment method | |
| RU2418074C1 (en) | Procedure for strengthening items out of metal materials for production of nano structured surface layers | |
| CN114196953A (en) | Method for increasing surface pulse plasma electric spark alloying depth of metal part | |
| Pyachin et al. | Formation of intermetallic coatings by electrospark deposition of titanium and aluminum on a steel substrate | |
| Ružbarský et al. | Plasma and thermal spraying | |
| Nikolenko et al. | Formation of electrospark coatings of the VK8 hard alloy with the Al2O3 additive | |
| Kuo et al. | Microstructure and wear characteristics of hypoeutectic, eutectic and hypereutectic (Cr, Fe) 23C6 carbides in hardfacing alloys | |
| RU2239001C1 (en) | Tool reinforcement method | |
| Kostadinov et al. | Elimination of irregularities and defects on steel surfaces through electro spark surface modification with aluminum alloys | |
| UA141165U (en) | METHOD OF INCREASING THE DEPTH OF PULSE PLASMA-SPARK ALLOYING OF SURFACES OF METAL PARTS |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20220318 |