CN107937862A - 一种用于链条生产的渗碳工艺 - Google Patents
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- 238000000034 method Methods 0.000 title claims abstract description 19
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- 238000005255 carburizing Methods 0.000 claims abstract description 50
- OKKJLVBELUTLKV-UHFFFAOYSA-N Methanol Chemical compound OC OKKJLVBELUTLKV-UHFFFAOYSA-N 0.000 claims abstract description 15
- 238000005496 tempering Methods 0.000 claims abstract description 12
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- 229910052799 carbon Inorganic materials 0.000 claims description 18
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 16
- 238000009413 insulation Methods 0.000 claims description 9
- 238000010438 heat treatment Methods 0.000 claims description 7
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- 229910000677 High-carbon steel Inorganic materials 0.000 description 2
- 230000008859 change Effects 0.000 description 2
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 2
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- 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
- C23C8/00—Solid state diffusion of only non-metal elements into metallic material surfaces; Chemical surface treatment of metallic material by reaction of the surface with a reactive gas, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals
- C23C8/06—Solid state diffusion of only non-metal elements into metallic material surfaces; Chemical surface treatment of metallic material by reaction of the surface with a reactive gas, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals using gases
- C23C8/08—Solid state diffusion of only non-metal elements into metallic material surfaces; Chemical surface treatment of metallic material by reaction of the surface with a reactive gas, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals using gases only one element being applied
- C23C8/20—Carburising
- C23C8/22—Carburising of ferrous surfaces
-
- 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
- C23C8/00—Solid state diffusion of only non-metal elements into metallic material surfaces; Chemical surface treatment of metallic material by reaction of the surface with a reactive gas, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals
- C23C8/80—After-treatment
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Abstract
一种用于链条生产的渗碳工艺，包括以下生产步骤：(1)首先将空炉升温至700‑800℃，同时打开循环冷却水，向炉内滴入渗碳剂和甲醇等裂解气体进行空炉渗碳，预渗碳1‑2h；(2)上述预渗碳之后继续升温深层渗碳1‑3h；如此循环数次；(3)炉压控制在50‑100Pa，待渗碳完成，温度降至830‑840℃，保温40‑60min，零件内外温度均匀后进行高温回火，高温回火温度为680‑690℃，出炉淬火并缓冷，启动炉盖取出工件。本发明的有益效果为：(1)该发明工艺简单，提高了链条表面耐磨性、耐蚀性及抗氧化性，并且缩短了渗碳的时间，延伸了链条产品最终的使用寿命和提高了其使用效果；(2)该发明中回火温度的控制，降低了最终链条产品磨削裂纹的产生。
Description
技术领域
本发明涉及链条生产加工领域，具体涉及一种用于链条生产的渗碳工艺。
背景技术
渗碳：是对金属表面处理的一种，采用渗碳的多为低碳钢或低合金钢，具体方法是将工件置入具有活性渗碳介质中，加热到900--950摄氏度的单相奥氏体区，保温足够时间后，使渗碳介质中分解出的活性碳原子渗入钢件表层，从而获得表层高碳，心部仍保持原有成分。相似的还有低温渗氮处理。这是金属材料常见的一种热处理工艺，它可以使渗过碳的工件表面获得很高的硬度，提高其耐磨程度。
渗碳(carburizing/carburization)是指使碳原子渗入到钢表面层的过程。也是使低碳钢的工件具有高碳钢的表面层，再经过淬火和低温回火，使工件的表面层具有高硬度和耐磨性，而工件的中心部分仍然保持着低碳钢的韧性和塑性。
渗碳工件的材料一般为低碳钢或低碳合金钢(含碳量小于0.25％)。渗碳后﹐钢件表面的化学成分可接近高碳钢。工件渗碳后还要经过淬火﹐以得到高的表面硬度﹑高的耐磨性和疲劳强度﹐并保持心部有低碳钢淬火后的强韧性﹐使工件能承受冲击载荷。渗碳工艺广泛用于飞机﹑汽车和拖拉机等的机械零件﹐如齿轮﹑轴﹑凸轮轴等。
按含碳介质的不同﹐渗碳可分为气体渗碳、固体渗碳﹑液体渗碳﹑和碳氮共渗(氰化)。
气体渗碳是将工件装入密闭的渗碳炉内，通入气体渗剂(甲烷、乙烷等)或液体渗剂(煤油或苯、酒精、丙酮等)，在高温下分解出活性碳原子，渗入工件表面，以获得高碳表面层的一种渗碳操作工艺。
固体渗碳是将工件和固体渗碳剂(木炭加促进剂组成)一起装在密闭的渗碳箱中，将箱放入加热炉中加热到渗碳温度，并保温一定时间，使活性碳原子渗人工件表面的一种最早的渗碳方法。
液体渗碳是利用液体介质进行渗碳，常用的液体渗碳介质有:碳化硅，"603"渗碳剂等。
碳氮共渗(氰化)又分为气体碳氮共渗、液体碳氮共渗、固体碳氮共渗。
现有技术中，经过渗碳处理的链条在切割中，经常会出现磨削裂纹，同时，最终生产的链条产品耐磨性，耐蚀性及抗氧化性均不是很高。
发明内容
本发明的目的是为了克服现有技术中的不足，提供一种用于链条生产的渗碳工艺。
为解决上述技术问题，本发明的技术方案为：
一种用于链条生产的渗碳工艺，包括以下生产步骤：
(1)首先将空炉升温至700-800℃，同时打开循环冷却水，向炉内滴入渗碳剂和甲醇等裂解气体进行空炉渗碳，持续升温至炉温达到渗碳温度890-920℃，碳势1.1-1.4，保温进行预渗碳1-2h；
(2)上述预渗碳之后继续升温至930-950℃，碳势1.1-1.4，保温进行深层渗碳1-3h；如此循环数次；
(3)炉压控制在50-100Pa，待渗碳完成，温度降至830-840℃，保温40-60min，零件内外温度均匀后进行高温回火，高温回火温度为680-690℃，出炉淬火并缓冷，启动炉盖取出工件。
优选地，步骤(2)循环次数为2-4次。
本发明的有益效果为：(1)该发明工艺简单，提高了链条表面耐磨性、耐蚀性及抗氧化性，并且缩短了渗碳的时间，延伸了链条产品最终的使用寿命和提高了其使用效果；(2)该发明中回火温度的控制，降低了最终链条产品磨削裂纹的产生，提高了生产效率及优品率。
具体实施方式
为使对本发明的结构特征及所达成的功效有更进一步的了解与认识，用以较佳的实施例配合详细的说明，说明如下：
实施例1
(1)首先将空炉升温至700℃，同时打开循环冷却水，向炉内滴入渗碳剂和甲醇等裂解气体进行空炉渗碳，持续升温至炉温达到渗碳温度890℃，碳势1.1，保温进行预渗碳1h；
(2)上述预渗碳之后继续升温至930℃，碳势1.1，保温进行深层渗碳1h；如此循环2次；
(3)炉压控制在50Pa，待渗碳完成，温度降至830℃，保温40min，零件内外温度均匀后进行高温回火，高温回火温度为680℃，出炉淬火并缓冷，启动炉盖取出工件。
实施例2
(1)首先将空炉升温至800℃，同时打开循环冷却水，向炉内滴入渗碳剂和甲醇等裂解气体进行空炉渗碳，持续升温至炉温达到渗碳温度920℃，碳势1.4，保温进行预渗碳2h；
(2)上述预渗碳之后继续升温至950℃，碳势1.4，保温进行深层渗碳3h；如此循环4次；
(3)炉压控制在100Pa，待渗碳完成，温度降至840℃，保温60min，零件内外温度均匀后进行高温回火，高温回火温度为690℃，出炉淬火并缓冷，启动炉盖取出工件。
实施例3
(1)首先将空炉升温至750℃，同时打开循环冷却水，向炉内滴入渗碳剂和甲醇等裂解气体进行空炉渗碳，持续升温至炉温达到渗碳温度900℃，碳势1.3，保温进行预渗碳1.5h；
(2)上述预渗碳之后继续升温至940℃，碳势1.3，保温进行深层渗碳1.5h；如此循环3次；
(3)炉压控制在75Pa，待渗碳完成，温度降至835℃，保温50min，零件内外温度均匀后进行高温回火，高温回火温度为685℃，出炉淬火并缓冷，启动炉盖取出工件。
本发明的有益效果为：(1)该发明工艺简单，提高了链条表面耐磨性、耐蚀性及抗氧化性，并且缩短了渗碳的时间，延伸了链条产品最终的使用寿命和提高了其使用效果；(2)该发明中回火温度的控制，降低了最终链条产品磨削裂纹的产生，提高了生产效率及优品率。
以上显示和描述了本发明的基本原理、主要特征和本发明的优点。本行业的技术人员应该了解，本发明不受上述实施例的限制，上述实施例和说明书中描述的只是本发明的原理，在不脱离本发明精神和范围的前提下本发明还会有各种变化和改进，这些变化和改进都落入要求保护的本发明的范围内。本发明要求的保护范围由所附的权利要求书及其等同物界定。
Claims (2)
1.一种用于链条生产的渗碳工艺，其特征在于：
包括以下生产步骤：
(1)首先将空炉升温至700-800℃，同时打开循环冷却水，向炉内滴入渗碳剂和甲醇等裂解气体进行空炉渗碳，持续升温至炉温达到渗碳温度890-920℃，碳势1.1-1.4，保温进行预渗碳1-2h；
(2)上述预渗碳之后继续升温至930-950℃，碳势1.1-1.4，保温进行深层渗碳1-3h；如此循环数次；
(3)炉压控制在50-100Pa，待渗碳完成，温度降至830-840℃，保温40-60min，零件内外温度均匀后进行高温回火，高温回火温度为680-690℃，出炉淬火并缓冷，启动炉盖取出工件。
2.根据权利要求1所述的一种用于链条生产的渗碳工艺，其特征在于：步骤(2)循环次数为2-4次。
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN111041182A (zh) * | 2019-12-20 | 2020-04-21 | 绩溪山合机械有限公司 | 一种链条加工工艺方法 |
| CN113943161A (zh) * | 2021-11-25 | 2022-01-18 | 王耀民 | 一种Ti（BCN）粉末及其制备方法 |
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| CN105648393A (zh) * | 2014-12-03 | 2016-06-08 | 重庆业高家具有限公司 | 一种模具的表面渗碳工艺 |
| CN105689969A (zh) * | 2014-11-26 | 2016-06-22 | 重庆市巴南区永兴机械厂 | 一种导柱加工工艺 |
| CN106141575A (zh) * | 2015-05-17 | 2016-11-23 | 王华美 | 一种发动机用耐高温排气门 |
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- 2017-11-24 CN CN201711192123.XA patent/CN107937862A/zh active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN105689969A (zh) * | 2014-11-26 | 2016-06-22 | 重庆市巴南区永兴机械厂 | 一种导柱加工工艺 |
| CN105648393A (zh) * | 2014-12-03 | 2016-06-08 | 重庆业高家具有限公司 | 一种模具的表面渗碳工艺 |
| CN106141575A (zh) * | 2015-05-17 | 2016-11-23 | 王华美 | 一种发动机用耐高温排气门 |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111041182A (zh) * | 2019-12-20 | 2020-04-21 | 绩溪山合机械有限公司 | 一种链条加工工艺方法 |
| CN113943161A (zh) * | 2021-11-25 | 2022-01-18 | 王耀民 | 一种Ti（BCN）粉末及其制备方法 |
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