CN109628718A - 一种螺栓的热处理工艺 - Google Patents

一种螺栓的热处理工艺 Download PDF

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Publication number
CN109628718A
CN109628718A CN201710927771.9A CN201710927771A CN109628718A CN 109628718 A CN109628718 A CN 109628718A CN 201710927771 A CN201710927771 A CN 201710927771A CN 109628718 A CN109628718 A CN 109628718A
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Prior art keywords
bolt
temperature
furnace
risen
hours
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王卫东
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Xuzhou Dongpeng Tools Manufacturing Co Ltd
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Xuzhou Dongpeng Tools Manufacturing Co Ltd
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Priority to CN201710927771.9A priority Critical patent/CN109628718A/zh
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    • CCHEMISTRY; METALLURGY
    • C21METALLURGY OF IRON
    • C21DMODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
    • C21D9/00Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor
    • C21D9/0093Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor for screws; for bolts
    • CCHEMISTRY; METALLURGY
    • C21METALLURGY OF IRON
    • C21DMODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
    • C21D1/00General methods or devices for heat treatment, e.g. annealing, hardening, quenching or tempering
    • C21D1/18Hardening; Quenching with or without subsequent tempering
    • CCHEMISTRY; METALLURGY
    • C23COATING 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
    • C23CCOATING 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
    • C23C8/00Solid 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

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  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Organic Chemistry (AREA)
  • Materials Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Metallurgy (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Cleaning And De-Greasing Of Metallic Materials By Chemical Methods (AREA)
  • Solid-Phase Diffusion Into Metallic Material Surfaces (AREA)
  • Heat Treatment Of Articles (AREA)

Abstract

一种螺栓的热处理工艺,包括如下步骤:(1)采用超声波设备进行超声清洗;(2)将待处理螺栓放入加热炉中,炉温升至360‑370℃;(3)将炉温升至600‑610℃;(4)将炉温升至800‑810℃;(5)在900‑920℃进行渗碳处理;(6)在600‑620℃的盐浴炉中进行淬火;(7)将炉温升至300‑305℃进行回火处理;(8)。本发明提供一种螺栓的热处理工艺,经过本发明处理后的螺栓具有极高的表面硬度,且制得的螺栓断面收缩率小,配合率提高,废品率降低,并且避免使用对人体和环境有害的氰化物类渗剂。

Description

一种螺栓的热处理工艺
技术领域
本发明涉及螺栓的热处理工艺,特别涉及一种螺栓的热处理工艺。
背景技术
高强度紧固件根据技术的相关要求都要进行调质处理,热处理调质是为提高紧固件的综合机械性能,来满足产品规定的抗拉强度值和屈强比。因为高强度螺栓生产量大,价格低廉,螺纹部分又是比较细微相对精密的结构,所以,要求热处理设备须具备生产能力大、自动化程度高,且具有良好的热处理能力。现有的强度高的螺栓的处理工艺是采用渗碳或氰化加淬火回火等工艺进行处理,并且采用850-900°C保温10小时的完全退火工艺,但利用该工艺生产的螺栓在淬火时断面收缩率较大,变形率大,与螺母的配合率低,且废品率较高。
发明内容
针对现有技术中的上述不足,本发明提供了一种螺栓的热处理工艺,其结构简单,方便推广。
为了达到上述发明目的,本发明采用的技术方案为:
一种螺栓的热处理工艺,包括如下步骤:
(1)采用超声波设备进行超声清洗:取出螺栓后进行放入水池,用高压喷水枪进行高压冲洗以去处表面的油污,自然晾干20-30分钟;
(2)将待处理螺栓放入加热炉中,炉温升至360-370°C,保温4-5小时;
(3)将炉温升至600-610°C,保温3小时;
(4)将炉温升至800-810°C,保温2小时;
(5)在900-920°C进行渗碳处理,然后降温到800°C并风冷;
(6)在600-620°C的盐浴炉中进行淬火,保温5-6小时;
(7)将炉温升至300-305°C进行回火处理,保温8-10小时后空冷至常温;
(8)清洗,立即作脱水封闭处理。
本发明的有益效果为:提供一种螺栓的热处理工艺,经过本发明处理后的螺栓具有极高的表面硬度,且制得的螺栓断面收缩率小,配合率提高,废品率降低,并且避免使用对人体和环境有害的氰化物类渗剂。
具体实施方式
为了使本发明的内容更容易被清楚地理解,下面将对本发明实施例中的技术方案进行清楚、完整地描述。
一种螺栓的热处理工艺,包括如下步骤:
(1)采用超声波设备进行超声清洗:取出螺栓后进行放入水池,用高压喷水枪进行高压冲洗以去处表面的油污,自然晾干20-30分钟;
(2)将待处理螺栓放入加热炉中,炉温升至360-370°C,保温4-5小时;
(3)将炉温升至600-610°C,保温3小时;
(4)将炉温升至800-810°C,保温2小时;
(5)在900-920°C进行渗碳处理,然后降温到800°C并风冷;
(6)在600-620°C的盐浴炉中进行淬火,保温5-6小时;
(7)将炉温升至300-305°C进行回火处理,保温8-10小时后空冷至常温;
(8)清洗,立即作脱水封闭处理。
以上所述仅为本发明专利的较佳实施例而已,并不用以限制本发明专利,凡在本发明专利的精神和原则之内所作的任何修改、等同替换和改进等,均应包含在本发明专利的保护范围之内。

Claims (1)

1.一种螺栓的热处理工艺,其特征在于,包括如下步骤:
(1)采用超声波设备进行超声清洗:取出螺栓后进行放入水池,用高压喷水枪进行高压冲洗以去处表面的油污,自然晾干20-30分钟;
(2)将待处理螺栓放入加热炉中,炉温升至360-370℃,保温4-5小时;
(3)将炉温升至600-610℃,保温3小时;
(4)将炉温升至800-810℃,保温2小时;
(5)在900-920℃进行渗碳处理,然后降温到800℃并风冷;
(6)在600-620℃的盐浴炉中进行淬火,保温5-6小时;
(7)将炉温升至300-305℃进行回火处理,保温8-10小时后空冷至常温;
(8)清洗,立即作脱水封闭处理。
CN201710927771.9A 2017-10-09 2017-10-09 一种螺栓的热处理工艺 Pending CN109628718A (zh)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111590272A (zh) * 2020-05-15 2020-08-28 江苏永昊高强度螺栓有限公司 一种螺栓加工方法

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103643000A (zh) * 2013-11-26 2014-03-19 常熟市东风齿轮厂 耐磨齿轮的热处理工艺
CN103643018A (zh) * 2013-11-26 2014-03-19 常熟市福熙机械零部件制造有限公司 螺栓的热处理工艺
CN105349749A (zh) * 2014-08-22 2016-02-24 无锡市第二标准件制造有限公司 螺栓热处理工艺
CN105714067A (zh) * 2014-12-05 2016-06-29 青岛泰威机床有限公司 螺栓的热处理工艺
CN105734250A (zh) * 2014-12-09 2016-07-06 重庆凌云工具有限公司 20CrMnMo齿轮热处理工艺
CN106555036A (zh) * 2016-12-07 2017-04-05 河池市技术开发中心 一种螺栓热处理工艺

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103643000A (zh) * 2013-11-26 2014-03-19 常熟市东风齿轮厂 耐磨齿轮的热处理工艺
CN103643018A (zh) * 2013-11-26 2014-03-19 常熟市福熙机械零部件制造有限公司 螺栓的热处理工艺
CN105349749A (zh) * 2014-08-22 2016-02-24 无锡市第二标准件制造有限公司 螺栓热处理工艺
CN105714067A (zh) * 2014-12-05 2016-06-29 青岛泰威机床有限公司 螺栓的热处理工艺
CN105734250A (zh) * 2014-12-09 2016-07-06 重庆凌云工具有限公司 20CrMnMo齿轮热处理工艺
CN106555036A (zh) * 2016-12-07 2017-04-05 河池市技术开发中心 一种螺栓热处理工艺

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111590272A (zh) * 2020-05-15 2020-08-28 江苏永昊高强度螺栓有限公司 一种螺栓加工方法

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Application publication date: 20190416