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WO1999048109A1 - Cable multifilament superelastique en alliage nickel-titane forme par etirage - Google Patents

Cable multifilament superelastique en alliage nickel-titane forme par etirage Download PDF

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Publication number
WO1999048109A1
WO1999048109A1 PCT/US1999/005775 US9905775W WO9948109A1 WO 1999048109 A1 WO1999048109 A1 WO 1999048109A1 US 9905775 W US9905775 W US 9905775W WO 9948109 A1 WO9948109 A1 WO 9948109A1
Authority
WO
WIPO (PCT)
Prior art keywords
nickel
cable
titanium
diameter
wire
Prior art date
Application number
PCT/US1999/005775
Other languages
English (en)
Inventor
Francisco J. Avellanet
Thomas O. Bales
Original Assignee
General Science And Technology Corporation
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by General Science And Technology Corporation filed Critical General Science And Technology Corporation
Priority to AU30939/99A priority Critical patent/AU3093999A/en
Priority to JP2000537225A priority patent/JP2003526177A/ja
Priority to EP99912597A priority patent/EP1070326A4/fr
Publication of WO1999048109A1 publication Critical patent/WO1999048109A1/fr

Links

Classifications

    • D—TEXTILES; PAPER
    • D07—ROPES; CABLES OTHER THAN ELECTRIC
    • D07B—ROPES OR CABLES IN GENERAL
    • D07B1/00—Constructional features of ropes or cables
    • D07B1/06—Ropes or cables built-up from metal wires, e.g. of section wires around a hemp core
    • D07B1/0693—Ropes or cables built-up from metal wires, e.g. of section wires around a hemp core having a strand configuration
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
    • A61M25/00—Catheters; Hollow probes
    • A61M25/01—Introducing, guiding, advancing, emplacing or holding catheters
    • A61M25/09—Guide wires
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21C—MANUFACTURE OF METAL SHEETS, WIRE, RODS, TUBES, PROFILES OR LIKE SEMI-MANUFACTURED PRODUCTS OTHERWISE THAN BY ROLLING; AUXILIARY OPERATIONS USED IN CONNECTION WITH METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL
    • B21C1/00—Manufacture of metal sheets, wire, rods, tubes or like semi-manufactured products by drawing
    • B21C1/02—Drawing metal wire or like flexible metallic material by drawing machines or apparatus in which the drawing action is effected by drums
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21C—MANUFACTURE OF METAL SHEETS, WIRE, RODS, TUBES, PROFILES OR LIKE SEMI-MANUFACTURED PRODUCTS OTHERWISE THAN BY ROLLING; AUXILIARY OPERATIONS USED IN CONNECTION WITH METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL
    • B21C37/00—Manufacture of metal sheets, rods, wire, tubes, profiles or like semi-manufactured products, not otherwise provided for; Manufacture of tubes of special shape
    • B21C37/04—Manufacture of metal sheets, rods, wire, tubes, profiles or like semi-manufactured products, not otherwise provided for; Manufacture of tubes of special shape of rods or wire
    • B21C37/045—Manufacture of wire or rods with particular section or properties
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
    • A61M25/00—Catheters; Hollow probes
    • A61M25/01—Introducing, guiding, advancing, emplacing or holding catheters
    • A61M25/09—Guide wires
    • A61M2025/09058—Basic structures of guide wires
    • A61M2025/09075—Basic structures of guide wires having a core without a coil possibly combined with a sheath
    • D—TEXTILES; PAPER
    • D07—ROPES; CABLES OTHER THAN ELECTRIC
    • D07B—ROPES OR CABLES IN GENERAL
    • D07B2201/00—Ropes or cables
    • D07B2201/20—Rope or cable components
    • D07B2201/2001—Wires or filaments
    • D07B2201/2009—Wires or filaments characterised by the materials used
    • D—TEXTILES; PAPER
    • D07—ROPES; CABLES OTHER THAN ELECTRIC
    • D07B—ROPES OR CABLES IN GENERAL
    • D07B2205/00—Rope or cable materials
    • D07B2205/30—Inorganic materials
    • D07B2205/3021—Metals
    • D07B2205/3085—Alloys, i.e. non ferrous

Definitions

  • the present invention relates to wires having a low modulus of elasticity. More particularly, the present invention is related to improvements in nickel-titanium alloy wires.
  • the present invention has application to many arts, including the guidewire arts of some of the parent applications hereof, the electrical cable arts of others of the parent applications hereof, etc.
  • Wire is manufactured from ingots using a rolling mill and a drawing bench.
  • the preliminary treatment of the material to be manufactured into wire is done in the rolling mill where white hot billets (square section ingots) are rolled to round wire rod.
  • the action of atmospheric oxygen causes a coating of mill scale to form on the hot surface of the rod and must be removed.
  • This descaling can be done by various mechanical methods (e.g., shot- blasting) or by pickling, i.e., immersion of the wire rod in a bath of dilute sulphuric or hydrochloric acid or mixtures with hydrofluoric acid. After pickling, the wire rod may additionally undergo a jolting treatment which dislodges the scale loosened by the acid.
  • Prior art Figure 1 shows a simple drawing bench 10.
  • the wire 12 is pulled through a draw plate 14 which is provided with a number of holes, e.g. 16, (dies) of various diameters. These dies have holes which taper from the diameter of the wire 12 that enters the die to the smaller diameter of the wire 12' that emerges from the die.
  • the thick wire rod 12 is coiled on a vertical spool 18 called a swift and is pulled through the die by a rotating drum 20 mounted on a vertical shaft 22 which is driven by bevel gearing 24.
  • the drum can be disconnected from the drive by means of a clutch 26.
  • the end of the wire is sharpened to a point and threaded through the die. It is seized by a gripping device and rapidly pulled through the die. This is assisted by lubrication of the wire.
  • Each passage through a die reduces the diameter of the wire by a certain amount. By successively passing the wire through dies of smaller and smaller diameter, thinner and thinner wire is obtained.
  • the dies used in the modern wire industry are precision-made tools, usually made of tungsten carbide for larger sizes or diamond for smaller sizes.
  • the die design and fabrication is relatively complex and dies may be made of a variety of materials including single crystal natural or synthetic diamond, polycrystalline diamond or a mix of tungsten and cobalt powder mixed together and cold pressed into the carbide nib shape.
  • a cross section of die 16 is shown in prior art Figure 2.
  • the dies used for drawing wire have an outer steel casing 30 and an inner nib 32 which, as mentioned above, may be made of carbide or diamond or the like.
  • the die has a large diameter entrance 34, known as the bell, which is shaped so that wire entering the die will draw lubricant with it.
  • the shape of the bell causes the hydrostatic pressure to increase and promotes the flow of lubricant into the die.
  • the region 36 of the die where the actual reduction in diameter occurs is called the approach angle. In the design of dies, the approach angle is an important parameter.
  • the bearing region does not cause diametric reduction, but does produce a frictional drag on the wire.
  • the chief function of the bearing region 38 is to permit the conical approach surface 36 to be refinished (to remove surface damage due to die wear) without changing the die exit.
  • the last region 40 of the die is called the back relief. The back relief allows the metal wire to expand slightly as the wire leaves the die. It also minimizes the possibility of abrasion taking place if the drawing stops or if the die is out of alignment with the path of the wire.
  • wire drawing appears to be a simple metalworking process, those skilled in the art will appreciate that many different parameters affect the physical quality of the drawn wire. Among these parameters, draw stress and flow stress play an important role. If these parameters are not carefully considered, the drawn wire may have reduced tensile strength. A discussion of the practical aspects of wire drawing can be found in Wright, Roger N., "Mechanical Analysis and Die Design", Wire Journal, October 1979, the complete disclosure of which is hereby incorporated by reference herein.
  • the wire forming processes described above may be used to form different kinds of wires.
  • various characteristics of the formed wire are of interest, depending upon the art in which the wire is to be used. These aspects include, but are not limited to the electrical resistance, tensile strength, and flexibility of the wire. Wire flexibility is particularly important in the medical arts which utilize wires in inter alia stents and guidewires, although wire flexibility is important in other arts as well. For that reason, the medical arts have had much interest recently in nickel-titanium (Nitinol) alloy wires which exhibit superelastic characteristics.
  • the highly flexible cable of the present invention includes two and preferably three or more strands of nickel- titanium alloy wire which are twined to form a wire rope.
  • the wire rope has no central core wire, while according to other embodiments, the wire rope is provided with a central core wire.
  • the nickel-titanium alloy wire rope is drawn through successive dies to reduce its diameter until the outer surface of the resulting cable is substantially smooth, the cross section of the cable is substantially circular, and the overall diameter of the wire rope is reduced by 20-50%.
  • the cable is then annealed to remove the effects of cold working, and the resulting cable/wire, with or without a central core, has been found to have an improved flexibility (i.e., a lower modulus of elasticity) relative to single strand nickel-titanium wires of the same diameter.
  • Figure 1 is a schematic perspective view of a prior art wire drawing apparatus
  • Figure 2 is a schematic sectional view of a prior art drawing die
  • Figure 3 is a schematic view of a wire rope having no central core being drawn through a die according to the invention
  • Figure 4 is a cross sectional view taken along line 4-4 in Figure 3;
  • Figure 5 is a cross sectional view taken along line 5-5 in Figure 3;
  • Figure 6 is a schematic view of a wire rope having a central core being drawn through a die according to the invention.
  • Figure 7 is a cross sectional view taken along line 7-7 in Figure 6;
  • Figure 8 is a cross sectional view taken along line 8-8 in Figure 6;
  • Figure 9 is a cross sectional view another exemplar wire rope prior to being drawn through a die according to the invention.
  • Figure 10 is a cross sectional view of a cable formed from the wire rope in Figure 9.
  • a highly flexible nickel-titanium alloy cable 100 is manufactured according to the following method.
  • Three strands of nickel-titanium alloy (e.g., Nitinol) wire 102, 104, 106 are twined (tiwsted) together (with no core wire) to form a nickel- titanium alloy wire rope 108.
  • the wire rope 108 is pulled through a die 110 using known wire drawing methods and apparatus whereby its diameter is decreased.
  • the nickel- titanium alloy wire rope 108 is successively drawn through dies of decreasing diameter. During the drawing process, the wires 102, 104, 106 are plastically deformed.
  • the cable 100 assumes a substantially circular cross section as shown in Figure 5, but exhibits increased flexibility relative to single strand nickel-titanium alloy wires of the same cross section as will be discussed in more detail below. If desired, the substantially smooth surface of the cable 100 can be easily insulated with an extruded or co- extruded material.
  • the wire rope 108 is successively pulled through multiple dies of decreasing diameter.
  • the resulting cable 100 has a diameter which is approximately 20-50% smaller, and preferably at least 30% smaller than the diameter of the wire rope 108.
  • Nitinol wire Three strands of .010 inch diameter Nitinol wire were helically twisted at a lay length of approximately .080 inches to form a wire rope of approximately .021" diameter, and fed through successive dies of .019", .018", .016", .014", and .013" diameters to form a Nitinol cable. After each die, it was noticed that the Nitinol cable rebounded to a slightly larger diameter than the diameter of the die. Thus, after the last die, the Nitinol cable was found to have a diameter of .014" rather than .013".
  • Nitinol cable was then annealed for approximately one minute at a temperature of approximately 500 °C to remove the effects of cold-working from the cable.
  • Pieces of the resulting twisted and drawn Nitinol cable were then subjected to bend radius testing by wrapping pieces of the cables around pins of different diameters and by clamping the cable back on itself with a pair of pliers to simulate a zero-diameter bend. Comparison tests were conducted on .014" diameter Nitinol wires (single strands) . The results of the bend radius testing are set forth in Table 1, with percent recovery calculated according to 7
  • the Nitinol cable of the invention exhibited significantly increased flexibility relative to the same diameter Nitinol wire.
  • the Nitinol cable appears to be able to be twisted around a pin having a diameter of as little as approximately nine times the diameter of the cable without taking a set (i.e., with substantially 100% recovery), while the Nitinol wire takes a set when twisted around a pin having a diameter of approximately twelve or thirteen times the diameter of the wire.
  • the Nitinol cable recovers over 90% when twisted around a pin having a diameter of only approximately two times the diameter of the cable, while the Nitinol wire will bend approximately ninety degrees when similarly twisted.
  • the recoverable elastic strain of the Nitinol cable is significantly lower than the recoverable elastic strain of the Nitinol wire. Furthermore, it is believed that the Nitinol cable of the invention exhibits high elastic characteristics prior to entering the stress-induced martensite phase.
  • Nitinol cable Three strands of .006 inch diameter Nitinol wire were twisted at a lay length of approximately .080 inches to form a wire rope of approximately .013" diameter, and fed through successive dies of .011", .010", .009", .008", and .007" diameters to form a Nitinol cable. After each die, it was noticed that the Nitinol cable rebounded to a slightly larger diameter than the diameter of the die. Thus, after the last die, the Nitinol cable was found to have a diameter of .008" rather than .007".
  • Nitinol cable was then annealed for approximately one minute at a temperature of approximately 500 °C to remove the effects of cold-working from the cable.
  • Pieces of the resulting twisted and drawn Nitinol cable were then subjected to bend radius testing by wrapping pieces of the cables around pins of different diameters and by clamping the cable back on itself with a pair of pliers to simulate a zero-diameter bend. Comparison tests were conducted on .008" diameter Nitinol wires
  • the Nitinol cable of the invention exhibited significantly increased flexibility relative to the same diameter Nitinol wire.
  • the Nitinol cable appears to be able to recover 99% or more when twisted around a pin having a diameter of only approximately six times the diameter of the cable, while the Nitinol wire loses that capability with a pin twice that diameter (i.e., twelve times the diameter of the cable) .
  • the Nitinol cable when clamped with pliers to simulate an zero diameter bend, recovered over 93%, while the Nitinol wire took a set of more than ninety degrees .
  • NiTi cable Three strands of .005 inch diameter nickel-titanium alloy (50%-50%) wire are helically twisted at a lay length of approximately .042 inches to form a wire rope of approximately .011" diameter, and fed through successive dies of .0100", .0090", .0080", .0075” and .0070" diameters to form a NiTi cable. After the last die, the NiTi cable has a diameter of approximately .0080". The so-formed NiTi cable is then annealed for approximately one minute at a temperature of approximately 500 °C to remove the effects of cold-working from the cable, and the resulting cable exhibits extremely favorable flexibility characteristics. In addition, because there is no core wire, the .0080" cable may be ground down as desired.
  • a portion of the .0080" cable may be tapered and terminate in a tip section of e.g., .0040" or .0025" or otherwise.
  • a portion of the .0080" cable may be ground without tapering to form a tip section of desired diameter.
  • Nitinol cable Four strands of .006 inch diameter Nitinol wire are twisted at a lay length of approximately .082 inches to form a wire rope of approximately .015" diameter, and fed through successive dies of .014", .013", .012", .011", .010” and .009" diameters to form Nitinol cable. After the last die, the Nitinol cable has a diameter of approximately .010". The so-formed Nitinol cable is 10
  • NiTi cable Three strands of .015 inch diameter nickel-titanium alloy (51%-49%) wire are twisted at a lay length of approximately .110 inches to form a wire rope of approximately .032 inch diameter, and fed through successive dies of .029", .026", .024", .022", and .020" diameters to form a NiTi cable. After the last die, the NiTi cable has a diameter of approximately .021". The so- formed NiTi cable is then annealed for approximately seventy-five seconds at a temperature of approximately 500 °C to remove the effects of cold-working from the cable, and the resulting cable exhibits extremely favorable flexibility characteristics.
  • Nitinol wire Two strands of .010" and two strands of .005" Nitinol wire are twisted together (with the .005" strands between the .010" strands) at a lay length of approximately .080 inches to form a wire rope of approximately .020" diameter, and fed through successive dies of .018", .016", .014", .012", and .011" diameters to form a Nitinol cable. After the last die, the Nitinol cable has a round cross section with a diameter of approximately .012". The so-formed Nitinol cable is then annealed for approximately sixty seconds at a temperature of approximately 500 °C to remove the effects of cold-working from the cable, and the resulting cable exhibits extremely favorable flexibility characteristics.
  • Nitinol cable Three strands of .028" Nitinol wires are twisted at a lay length of approximately .240 inches form a wire rope of approximately .057" diameter, and fed through successive dies of .053", .049", .045", .041", and .037" diameters to form a Nitinol cable. After the last die, the Nitinol cable has a round cross 11
  • Nitinol cable is then annealed for approximately ninety seconds at a temperature of approximately 500 °C to remove the effects of cold-working from the cable, and the resulting cable exhibits extremely favorable flexibility characteristics.
  • a highly flexible nickel-titanium alloy cable 200 having a central core wire is manufactured according to the following method.
  • Five strands of nickel-titanium alloy (e.g., Nitinol) wire 202, 204, 206, 208, 210 are twined (twisted) together about a core wire 212 to form a nickel-titanium alloy wire rope 214.
  • the wire rope 214 is pulled through a die 216 using known wire drawing methods. During the drawing process, the wires 202, 204, 206, 208, 210, 212 are plastically deformed.
  • the cable 200 assumes a substantially circular cross section as shown in Figure 8, but exhibits increased flexibility relative to single strand nickel- titanium alloy wires of the same cross section as will be discussed in more detail below. If desired, the substantially smooth surface of the cable 200 can be easily insulated with an extruded or co-extruded material.
  • the wire rope 214 is successively pulled through multiple dies of decreasing diameter.
  • the resulting cable 200 has a diameter which is approximately 20-50% smaller, and preferably at least 30% smaller than the diameter of the wire rope 214.
  • Nitinol cable .028", .025", .022", .019", and .017" diameters to form a Nitinol cable.
  • the Nitinol cable rebounds to a slightly larger diameter than the diameter of the die.
  • the Nitinol cable has a diameter of .018" rather than .017".
  • the so-formed Nitinol cable is then annealed for approximately one minute at a temperature of approximately 500 °C to remove the effects of cold-working from the cable.
  • the Nitinol cable of the invention exhibits significantly increased flexibility relative to same diameter Nitinol wire.
  • the recoverable elastic strain of the Nitinol cable is significantly higher than the recoverable elastic strain of the Nitinol wire. Furthermore, it is believed that the Nitinol cable of the invention exhibits high elastic characteristics prior to entering the stress-induced martensite phase.
  • Nitinol wire Six strands of .006 inch diameter Nitinol wire were helically twisted about a single strand of .006 inch diameter Nitinol core wire at a lay length of approximately .080 inches to form a wire rope of approximately .018" diameter, and fed through successive dies of .017", .015", .014", .013", and .012" diameters to form a Nitinol cable. After each die, the Nitinol cable rebounded to a slightly larger diameter than the diameter of the die. Thus, after the last die, the Nitinol cable had a diameter of .013" rather than .012". The so-formed Nitinol cable was then annealed for approximately one minute at a temperature of approximately 500 °C to remove the effects of cold-working from the cable, and the resulting cable exhibited extremely favorable flexibility characteristics.
  • Nitinol wire Three strands of .010 inch diameter Nitinol wire are helically twisted about a single strand of .010 inch diameter Nitinol core wire at a lay length of approximately .080 inches to form a wire rope of approximately .028" diameter, and fed through successive dies of .025", .022", .019", .016", and .013" diameters to form a Nitinol cable. After each die, the Nitinol 13
  • the Nitinol cable rebounds to a slightly larger diameter than the diameter of the die.
  • the Nitinol cable has a diameter of .014" rather than .013".
  • the so-formed Nitinol cable is then annealed for approximately one minute at a temperature of approximately 500 °C to remove the effects of cold-working from the cable, and the resulting cable exhibits extremely favorable flexibility characteristics.
  • Nitinol wire Three strands of .015 inch diameter Nitinol wire are helically twisted about a single strand of .005 inch diameter Nitinol core wire at a lay length of approximately .080 inches to form a first wire rope of approximately .025" diameter, and fed through successive dies of .023", .020", .017", .015", and .013" diameters to form a Nitinol cable which rebounds to a diameter of approximately .014".
  • the so-formed .014" Nitinol cable is then annealed for approximately seventy-five seconds at a temperature of approximately 500 °C to remove the effects of cold-working from the cable, and the resulting cable exhibits extremely favorable flexibility characteristics.
  • Nitinol wire Eight strands of .010 inch diameter Nitinol wire are helically twisted about a single strand of .028 inch diameter Nitinol core wire at a lay length of approximately .080 inches to form a first wire rope of approximately .048" diameter, and fed through successive dies of .046", .044", .042", .040", and .038" diameters to form a Nitinol cable which rebounds to a diameter of approximately .040".
  • the so-formed .040" Nitinol cable is then annealed for approximately seventy-five seconds at a temperature of approximately 500 °C to remove the effects of cold-working from the cable, and the resulting cable exhibits extremely favorable flexibility characteristics.
  • Nitinol cable 200 Five strands of .010 inch diameter Nitinol wire are helically twisted about a single strand of .010 inch diameter Nitinol core wire at a lay length of approximately .080 inches to form a first wire rope of approximately .030" diameter, and fed through successive dies to form a Nitinol cable 200 having a .018" diameter, as shown in Figures 7 and 8 and described above in Example 8.
  • the .018" Nitinol cable is then preferably 15
  • Nitinol wire helically twisted about the .018" diameter Nitinol cable 200 at a lay length of approximately .080 inches to form a new wire rope 236 of approximately .039" diameter.
  • the new wire rope 236 is fed through successive dies of .037", .035", .033", .0315", and .030" diameters to form a Nitinol cable 238 which rebounds to a diameter of approximately .032".
  • the so- formed Nitinol cable is then annealed for approximately seventy- five seconds at a temperature of approximately 500 °C to remove the effects of cold-working from the cable, and the resulting cable exhibits extremely favorable flexibility characteristics.
  • Nitinol wire Five strands of .010 inch diameter Nitinol wire are helically twisted about a single strand of .008 inch diameter Nitinol core wire at a lay length of approximately .080 inches to form a first wire rope of approximately .028" diameter, and fed through successive dies of .026", .024", .021", .018", and .015" diameters to form a Nitinol cable having a .016" diameter (after rebound). The .016" Nitinol cable is then preferably annealed.
  • Nitinol wire Six strands of .007 inch diameter Nitinol wire are then helically twisted about the .016" diameter Nitinol cable at a lay length of approximately .080 inches to form a new wire rope of approximately .032" diameter.
  • the new wire rope is fed through successive dies of .030", .028", .026", .024", and .022" diameters to form a Nitinol cable which rebounds to a diameter of approximately .023".
  • the so-formed Nitinol cable is then annealed for approximately seventy-five seconds at a temperature of approximately 500 °C to remove the effects of cold-working from the cable, and the resulting cable exhibits extremely favorable flexibility characteristics.
  • strands with particular diameters have been disclosed, it will be appreciated that different numbers of strands (e.g., five, six and more) and different diameters could be utilized.
  • core wire has been disclosed as both a single nickel-titanium strand and a cable formed from multiple strands around a core wire, it will be appreciated that the core wire, where provided, can be any nickel titanium cable formed by the process described herein, and that the core wire may have the same diameter or a different diameter from the wires twisted thereabout.

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  • Engineering & Computer Science (AREA)
  • Health & Medical Sciences (AREA)
  • Mechanical Engineering (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Heart & Thoracic Surgery (AREA)
  • Pulmonology (AREA)
  • Anesthesiology (AREA)
  • Biomedical Technology (AREA)
  • Biophysics (AREA)
  • Hematology (AREA)
  • Animal Behavior & Ethology (AREA)
  • General Health & Medical Sciences (AREA)
  • Public Health (AREA)
  • Veterinary Medicine (AREA)
  • Non-Insulated Conductors (AREA)
  • Processes Specially Adapted For Manufacturing Cables (AREA)
  • Ropes Or Cables (AREA)

Abstract

L'invention concerne un câble (100) hautement flexible qui comprend deux, de préférence, trois ou plusieurs torons de câbles (102, 104, 106) en alliage nickel-titane qui sont retordus pour former un câble métallique (108). Le câble métallique (108) en alliage nickel-titane est formé à travers différentes matrices (110) qui réduisent son diamètre jusqu'à ce que la surface extérieure du câble (100) soit sensiblement lisse, que la coupe globale du câble (100) soit circulaire et que le diamètre total du câble métallique (108) soit réduit de 20 à 50 %. Le câble (100) est ensuite recuit pour éliminer les effets du travail à froid. Le câble ainsi obtenu s'est avéré présenter une flexibilité améliorée (p. ex. un module d'élasticité réduit) par rapport aux fils à toron simple en nickel-titane (102, 104, 106) présentant le même diamètre.
PCT/US1999/005775 1998-03-17 1999-03-17 Cable multifilament superelastique en alliage nickel-titane forme par etirage WO1999048109A1 (fr)

Priority Applications (3)

Application Number Priority Date Filing Date Title
AU30939/99A AU3093999A (en) 1998-03-17 1999-03-17 Multifilament nickel-titanium alloy drawn superelastic wire
JP2000537225A JP2003526177A (ja) 1998-03-17 1999-03-17 マルチフィラメントニッケル−チタン合金引き抜き超弾性ワイヤ
EP99912597A EP1070326A4 (fr) 1998-03-17 1999-03-17 Cable multifilament superelastique en alliage nickel-titane forme par etirage

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
US8747698P 1998-03-17 1998-03-17
US4420398A 1998-03-17 1998-03-17
US09/044,203 1998-03-17
US09/087,476 1998-03-17

Publications (1)

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WO1999048109A1 true WO1999048109A1 (fr) 1999-09-23

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PCT/US1999/005775 WO1999048109A1 (fr) 1998-03-17 1999-03-17 Cable multifilament superelastique en alliage nickel-titane forme par etirage

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Cited By (4)

* Cited by examiner, † Cited by third party
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FR2807770A1 (fr) * 2000-03-23 2001-10-19 Ormco Corp Ressort helicoidal multi-brins
CN105459281A (zh) * 2016-01-10 2016-04-06 盛利维尔（中国）新材料技术有限公司 一种新型复合金属固结磨料金刚绳及其生产工艺
CN110079907A (zh) * 2019-05-06 2019-08-02 滁州霞客环保色纺有限公司 一种双层包缠结构负泊松比的三组份复合纱线及其三通道环锭纺纱装置和控制方法
CN115845128A (zh) * 2022-12-12 2023-03-28 江阴法尔胜泓昇不锈钢制品有限公司 一种骨科内固定系统用钛合金绳及其制备工艺

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
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US6818076B1 (en) 2000-03-23 2004-11-16 Ormco Corporation Multi-strand coil spring
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CN110079907A (zh) * 2019-05-06 2019-08-02 滁州霞客环保色纺有限公司 一种双层包缠结构负泊松比的三组份复合纱线及其三通道环锭纺纱装置和控制方法
CN110079907B (zh) * 2019-05-06 2023-06-27 滁州霞客环保色纺有限公司 一种双层包缠结构负泊松比的三组份复合纱线及其三通道环锭纺纱装置和控制方法
CN115845128A (zh) * 2022-12-12 2023-03-28 江阴法尔胜泓昇不锈钢制品有限公司 一种骨科内固定系统用钛合金绳及其制备工艺
CN115845128B (zh) * 2022-12-12 2024-03-08 江阴法尔胜泓昇不锈钢制品有限公司 一种骨科内固定系统用钛合金绳及其制备工艺

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