CN102851479A - Heat treatment technology of high-strength bolt - Google Patents
Heat treatment technology of high-strength bolt Download PDFInfo
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- CN102851479A CN102851479A CN2011101871769A CN201110187176A CN102851479A CN 102851479 A CN102851479 A CN 102851479A CN 2011101871769 A CN2011101871769 A CN 2011101871769A CN 201110187176 A CN201110187176 A CN 201110187176A CN 102851479 A CN102851479 A CN 102851479A
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- 238000010438 heat treatment Methods 0.000 title claims abstract description 11
- 238000005516 engineering process Methods 0.000 title abstract description 8
- 238000010791 quenching Methods 0.000 claims abstract description 28
- 230000000171 quenching effect Effects 0.000 claims abstract description 26
- 238000001816 cooling Methods 0.000 claims abstract description 21
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 12
- 238000007669 thermal treatment Methods 0.000 claims description 15
- 238000005496 tempering Methods 0.000 claims description 5
- 238000004519 manufacturing process Methods 0.000 claims description 4
- 229910000851 Alloy steel Inorganic materials 0.000 claims description 2
- 239000007858 starting material Substances 0.000 claims description 2
- 239000013078 crystal Substances 0.000 abstract description 3
- 230000000694 effects Effects 0.000 abstract description 3
- 238000005336 cracking Methods 0.000 abstract description 2
- 238000009413 insulation Methods 0.000 abstract 1
- 239000007788 liquid Substances 0.000 abstract 1
- 238000010248 power generation Methods 0.000 abstract 1
- 238000007670 refining Methods 0.000 abstract 1
- 230000005611 electricity Effects 0.000 description 8
- 238000000034 method Methods 0.000 description 7
- 239000000463 material Substances 0.000 description 4
- 229910000734 martensite Inorganic materials 0.000 description 3
- 239000000203 mixture Substances 0.000 description 2
- 230000009466 transformation Effects 0.000 description 2
- 208000019901 Anxiety disease Diseases 0.000 description 1
- 238000004458 analytical method Methods 0.000 description 1
- 230000036506 anxiety Effects 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
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Abstract
The invention relates to a heat treatment technology, specifically to a heat treatment technology of a high-strength bolt, and belongs to the technical field of heat treatment processing. The high-strength bolt is suitable for joint of anchor bolts, tower tubes, machine heads and wind wheels on wind power generation equipment. According to the technology, after quenching heating insulation, a two-liquid quenching mode of water quenching and oil cooling is adopted, a heating workpiece is taken out from a quenching furnace and putted into water to be cooled for 10-15 s such that the temperature of the workpiece is reduced below 400 DEG C, and then the workpiece is putted into oil for continuous cooling. The heat treatment technology by water quenching and oil cooling has effects of refining crystal grains, effectively raising hardenability of large-sized bolts and minimizing and preventing quenching deformation and cracking tendency of large-sized bolts. The connecting bolt prepared by the technology has high strength and simultaneously has high plasticity and low-temperature impact toughness.
Description
Technical field
The present invention relates to a kind of thermal treatment process, be specifically related to a kind of thermal treatment process of high strength bolt, belong to the heat treatment process technical field, this high strength bolt is applicable to ground crab-bolt, tower cylinder, the head on the wind power plant, the connection of fan blade etc.
Background technology
Along with becoming increasingly conspicuous of environmental issue, the gradually anxiety of power supply, wind-power electricity generation more and more comes into one's own as a kind of generation mode of renewable energy source of cleaning, so that the wind-powered electricity generation Industry Quick Development.Wind-power electricity generation not only has been confined to land platform development, strides forward to ocean platform.Development along with the wind-powered electricity generation industry, wind power plant also is faced with unprecedented challenge with the production of high strength bolt, the expansion of installed capacity of wind-driven power, requirement to the high-strength bolt performance index is also more and more higher, not only require it to have high intensity, also more and more higher to plasticity and toughness reguirements simultaneously.For the little bolt of specification, usually adopt the type of cooling of oil quenching can obtain good mechanical property; And the larger bolt of specification adopts the conventional type of cooling often can not make material obtain desirable tissue and performance, the problems such as not through hardening, tissue odds be even often can occur.China is vast in territory, the seashore line length has abundant wind energy resources, the coastal and island that wind energy resources is abundant, it can the exploitation amount be about 1,000,000,000 kW, mainly is distributed in the provinces such as Liaoning, Hebei, Shandong, Jiangsu, Shanghai, Zhejiang, Fujian, Guangdong, Guangxi and Hainan.From at the end of the 1996-2006, China's wind-powered electricity generation installation total volume only breaks through 2000MW, wind-powered electricity generation still has the space of developing on a large scale very much, so that wind-powered electricity generation has the very wide market requirement with high strength bolt, but the wind-powered electricity generation industry awaits the improvement and bring new ideas of production technique to the requirements at the higher level of bolt performance index.
Summary of the invention
The objective of the invention is for overcoming above-mentioned the deficiencies in the prior art part, a kind of thermal treatment process of high strength bolt is provided, this technique adopts the water quenching and oil-cooling double quenching type of cooling behind the heat-treatment quenching heat tracing, heated parts taken out from quenching furnance at first put into water and cool off 10～15s workpiece temperature is down to below 400 ℃, then put into oil and continue cooling.Traditional oil quenching type of cooling, slow than water-cooled of speed of cooling easily produces non-martensite and changes near C curve " nose "; And in the temperature range below 400 ℃, do not need cold soon.More should be not cold soon when especially near the Ms line, martensitic transformation occuring, otherwise cause easily distortion and cracking.So below 400 ℃, should adopt oil cooling when especially near the Ms line, martensitic transformation occuring near C curve " nose ", adopting water-cooled.The thermal treatment process of water quenching and oil-cooling can not only play the effect of crystal grain thinning, effectively improve the hardening capacity of BIG SIZE BOLTS, and can reduce and prevent quenching strain and the tearing tendency of BIG SIZE BOLTS, have high-intensity have simultaneously higher plasticity and low-temperature impact toughness by the made joint bolt of this technique, its intensity rank satisfies more than 10.9 grades.
The present invention realizes with following technical scheme: a kind of thermal treatment process of high strength bolt is characterized in that: the starting material for the manufacture of bolt are the 42CrMoA steel alloy, and described thermal treatment process comprises:
1) normalizing: workpiece is placed 860 ℃～880 ℃ normalizing furnaces, be incubated 60 minutes, then air cooling;
2) quench: workpiece is placed 820 ℃～830 ℃ heating of quenching, be incubated 50 minutes; Then adopt the water quenching and oil-cooling double quenching type of cooling, be about to heated parts and from quenching furnance, take out and at first put into water and cool off 10～15s workpiece temperature is down to below 400 ℃, then put into oil and continue to be cooled to below 50 ℃;
3) tempering: in 575 ℃～585 ℃ tempering stoves of workpiece, be incubated 60 minutes, water-cooled.
After above-mentioned thermal treatment process was processed, it was 1060MPa that high strength bolt obtains tensile strength, and Proof strength of non-proportional is 970MPa, and elongation after fracture reaches 17% ,-40 ℃ of impact absorbing energy A
KV2Reach 78J.
Advantage of the present invention is: the thermal treatment process of water quenching and oil-cooling can not only play the effect of crystal grain thinning, effectively improve the hardening capacity of BIG SIZE BOLTS, and can reduce and prevent quenching strain and the tearing tendency of BIG SIZE BOLTS, have high-intensity have simultaneously higher plasticity and low-temperature impact toughness by the made joint bolt of this technique, its intensity rank satisfies more than 10.9 grades, and specific targets are shown in Table 1.
The table 1 wind power plant technical requirement of high strength bolt
Embodiment
Material specification is M36, and material composition sees Table 2: thermal treatment process sees Table 3: the bolt mechanical property sees Table 4:
Table 2 material chemical composition analysis (wt.%)
| Element | C | Si | Mn | S | P | Cr | Mo |
| Content | 0.41 | 0.248 | 0.79 | 0.004 | 0.010 | 0.95 | 0.15 |
Table 3 thermal treatment process
| Normalizing process | 860 ℃～880 ℃ are incubated 60 minutes, air cooling |
| Quenching technology | 820 ℃～830 ℃ are incubated 50 minutes, water quenching and oil-cooling |
| Tempering process | 575 ℃～585 ℃ are incubated 60 minutes, water-cooled |
Table 4 bolt sample mechanical property
The intensity rank of high strength bolt of the present invention is more than 10.9 grades, and mechanical property satisfies table 1 requirement.
Claims (2)
1. the thermal treatment process of a high strength bolt, it is characterized in that: the starting material for the manufacture of bolt are the 42CrMoA steel alloy, and described thermal treatment process comprises:
1) normalizing: workpiece is placed 860 ℃～880 ℃ normalizing furnaces, be incubated 60 minutes, then air cooling;
2) quench: workpiece is placed 820 ℃～830 ℃ heating of quenching, be incubated 50 minutes; Then adopt the water quenching and oil-cooling double quenching type of cooling, be about to heated parts and from quenching furnance, take out and at first put into water and cool off 10～15s workpiece temperature is down to below 400 ℃, then put into oil and continue to be cooled to below 50 ℃;
3) tempering: workpiece is placed 575 ℃～585 ℃ tempering stoves, be incubated 60 minutes, water-cooled.
2. the thermal treatment process of a kind of high strength bolt according to claim 1, it is characterized in that: after above-mentioned thermal treatment process is processed, described high strength bolt obtains tensile strength 1060MPa, Proof strength of non-proportional 970MPa, elongation after fracture reaches 17%, and-40 ℃ of impact absorbing energy AKV2 reach 78J.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110187176.9A CN102851479B (en) | 2011-06-29 | 2011-06-29 | Heat treatment technology of high-strength bolt |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110187176.9A CN102851479B (en) | 2011-06-29 | 2011-06-29 | Heat treatment technology of high-strength bolt |
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| CN102851479A true CN102851479A (en) | 2013-01-02 |
| CN102851479B CN102851479B (en) | 2014-04-30 |
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Cited By (19)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103266212A (en) * | 2013-05-31 | 2013-08-28 | 中原特钢股份有限公司 | Thermal treatment technology for improving low-temperature impact toughness of 25Cr2Ni4MoV steel forging |
| CN103586645A (en) * | 2013-11-28 | 2014-02-19 | 郑州水野大一热处理技术有限公司 | Manufacturing process of M72 high-strength bolts |
| CN103643018A (en) * | 2013-11-26 | 2014-03-19 | 常熟市福熙机械零部件制造有限公司 | Thermal processing technology for bolts |
| CN103667615A (en) * | 2013-12-10 | 2014-03-26 | 中联重科股份有限公司 | Thermal treatment method of 42CrMo workpiece |
| CN104178619A (en) * | 2014-08-17 | 2014-12-03 | 成都亨通兆业精密机械有限公司 | Heat treatment method for benefiting impact toughness of screw |
| CN104178618A (en) * | 2014-08-17 | 2014-12-03 | 成都亨通兆业精密机械有限公司 | Heat treatment method favorable for quality of screw |
| CN104195296A (en) * | 2014-08-19 | 2014-12-10 | 上海朋泰精密模具有限公司 | Novel anti-cracking quenching method for pinch roller work-piece |
| CN105714034A (en) * | 2015-03-19 | 2016-06-29 | 范玫光 | Prestressed anchor bolt used for wind power foundation and induction heating heat treatment method thereof |
| CN105821194A (en) * | 2016-06-07 | 2016-08-03 | 马鞍山钢铁股份有限公司 | Heat treatment technology for niobium and titanium-containing steel for motor train unit axle |
| CN105838868A (en) * | 2016-06-07 | 2016-08-10 | 马鞍山钢铁股份有限公司 | Heat treatment process of vanadium-titanium-containing steel for axles of motor train unit |
| CN105861789A (en) * | 2016-06-07 | 2016-08-17 | 马鞍山钢铁股份有限公司 | Thermal treatment process of vanadium-niobium-containing steel for motor train unit axle |
| CN105907938A (en) * | 2016-05-05 | 2016-08-31 | 太仓小小精密模具有限公司 | Heat treatment technology of high-strength bolt |
| CN106065428A (en) * | 2016-08-08 | 2016-11-02 | 常熟市常力紧固件有限公司 | A kind of Technology for Heating Processing of automobile engine high intensity hexagon-headed bolt |
| CN107099645A (en) * | 2017-05-15 | 2017-08-29 | 海盐哈特惠机械五金制品有限公司 | A kind of high-intensity fasteners quenching technical |
| CN107739782A (en) * | 2017-11-06 | 2018-02-27 | 舟山市7412工厂 | A kind of heat treatment method of elongate rod bolt |
| CN110964884A (en) * | 2019-11-29 | 2020-04-07 | 徐州新兴达克罗科技有限公司 | Heat treatment process for high-strength bolt |
| CN111842774A (en) * | 2020-07-29 | 2020-10-30 | 苏州畅利永紧固件有限公司 | Outer hexagonal cross bolt machining process |
| CN115679227A (en) * | 2022-11-04 | 2023-02-03 | 中铁隆昌铁路器材有限公司 | High-strength toughened bolt and heat treatment process thereof |
| WO2023184782A1 (en) * | 2022-04-01 | 2023-10-05 | 南京钢铁股份有限公司 | Manufacturing method for hot forging-formed, composite-quenched and structure-refined high-strength bolt |
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| CN101078087A (en) * | 2007-02-01 | 2007-11-28 | 南阳二机石油装备(集团)有限公司 | Petroleum drilling machine winch brake hub novel material and preparation method thereof |
| CN101435013A (en) * | 2008-12-26 | 2009-05-20 | 内蒙古北方重工业集团有限公司 | Preparation technique of flat shovel teeth material |
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| CN1706979A (en) * | 2004-06-07 | 2005-12-14 | 河南石油勘探局南阳石油机械厂 | Cast steel for bearing parts in mechanical lifting system and its making process |
| CN101078087A (en) * | 2007-02-01 | 2007-11-28 | 南阳二机石油装备(集团)有限公司 | Petroleum drilling machine winch brake hub novel material and preparation method thereof |
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| CN101805824A (en) * | 2010-03-23 | 2010-08-18 | 中信重工机械股份有限公司 | Interrupted quenching thermal treatment method of 42CrMo4 roller shaft |
Cited By (25)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103266212B (en) * | 2013-05-31 | 2014-08-06 | 中原特钢股份有限公司 | Thermal treatment technology for improving low-temperature impact toughness of 25Cr2Ni4MoV steel forging |
| CN103266212A (en) * | 2013-05-31 | 2013-08-28 | 中原特钢股份有限公司 | Thermal treatment technology for improving low-temperature impact toughness of 25Cr2Ni4MoV steel forging |
| CN103643018A (en) * | 2013-11-26 | 2014-03-19 | 常熟市福熙机械零部件制造有限公司 | Thermal processing technology for bolts |
| CN103586645B (en) * | 2013-11-28 | 2016-08-17 | 郑州水野大一热处理技术有限公司 | A kind of production technology of M72 high-strength bolt |
| CN103586645A (en) * | 2013-11-28 | 2014-02-19 | 郑州水野大一热处理技术有限公司 | Manufacturing process of M72 high-strength bolts |
| CN103667615A (en) * | 2013-12-10 | 2014-03-26 | 中联重科股份有限公司 | Thermal treatment method of 42CrMo workpiece |
| CN104178619A (en) * | 2014-08-17 | 2014-12-03 | 成都亨通兆业精密机械有限公司 | Heat treatment method for benefiting impact toughness of screw |
| CN104178618A (en) * | 2014-08-17 | 2014-12-03 | 成都亨通兆业精密机械有限公司 | Heat treatment method favorable for quality of screw |
| CN104195296A (en) * | 2014-08-19 | 2014-12-10 | 上海朋泰精密模具有限公司 | Novel anti-cracking quenching method for pinch roller work-piece |
| CN105714034A (en) * | 2015-03-19 | 2016-06-29 | 范玫光 | Prestressed anchor bolt used for wind power foundation and induction heating heat treatment method thereof |
| CN105907938A (en) * | 2016-05-05 | 2016-08-31 | 太仓小小精密模具有限公司 | Heat treatment technology of high-strength bolt |
| CN105861789A (en) * | 2016-06-07 | 2016-08-17 | 马鞍山钢铁股份有限公司 | Thermal treatment process of vanadium-niobium-containing steel for motor train unit axle |
| CN105838868B (en) * | 2016-06-07 | 2018-05-18 | 马鞍山钢铁股份有限公司 | A kind of axle of motor train unit steel heat treatment process of titanium containing vanadium |
| CN105821194A (en) * | 2016-06-07 | 2016-08-03 | 马鞍山钢铁股份有限公司 | Heat treatment technology for niobium and titanium-containing steel for motor train unit axle |
| CN105838868A (en) * | 2016-06-07 | 2016-08-10 | 马鞍山钢铁股份有限公司 | Heat treatment process of vanadium-titanium-containing steel for axles of motor train unit |
| CN105861789B (en) * | 2016-06-07 | 2018-07-03 | 马鞍山钢铁股份有限公司 | A kind of axle of motor train unit steel heat treatment process of niobium containing vanadium |
| CN105821194B (en) * | 2016-06-07 | 2018-04-03 | 马鞍山钢铁股份有限公司 | The axle of motor train unit steel heat treatment process of titanium containing niobium |
| CN106065428A (en) * | 2016-08-08 | 2016-11-02 | 常熟市常力紧固件有限公司 | A kind of Technology for Heating Processing of automobile engine high intensity hexagon-headed bolt |
| CN107099645A (en) * | 2017-05-15 | 2017-08-29 | 海盐哈特惠机械五金制品有限公司 | A kind of high-intensity fasteners quenching technical |
| CN107099645B (en) * | 2017-05-15 | 2019-07-30 | 海盐哈特惠机械五金制品有限公司 | A kind of high-intensity fasteners quenching technical |
| CN107739782A (en) * | 2017-11-06 | 2018-02-27 | 舟山市7412工厂 | A kind of heat treatment method of elongate rod bolt |
| CN110964884A (en) * | 2019-11-29 | 2020-04-07 | 徐州新兴达克罗科技有限公司 | Heat treatment process for high-strength bolt |
| CN111842774A (en) * | 2020-07-29 | 2020-10-30 | 苏州畅利永紧固件有限公司 | Outer hexagonal cross bolt machining process |
| WO2023184782A1 (en) * | 2022-04-01 | 2023-10-05 | 南京钢铁股份有限公司 | Manufacturing method for hot forging-formed, composite-quenched and structure-refined high-strength bolt |
| CN115679227A (en) * | 2022-11-04 | 2023-02-03 | 中铁隆昌铁路器材有限公司 | High-strength toughened bolt and heat treatment process thereof |
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| CN102851479B (en) | 2014-04-30 |
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Address after: 221007, Jiangsu, Xuzhou Sanhuan North Road, opposite Castle Peak Park Applicant after: Xuzhou Ruida High-Strength Fastener Factory Applicant after: XUZHOU PRODUCT QUALITY SUPERVISION AND INSPECTION CENTER Address before: 221007, Jiangsu, Xuzhou Sanhuan North Road, opposite Castle Peak Park Applicant before: Xuzhou Ruida High-Strength Fastener Factory Applicant before: Xuzhou Product Quality Supervise Inspection Institute |
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Inventor after: Xu Juehui Inventor after: Chen Jiarui Inventor after: Xie Dong Inventor after: Wang Ning Inventor after: Wang Hao Inventor after: Wang Yong Inventor before: Wang Ning Inventor before: Chen Jiarui Inventor before: Xie Dong Inventor before: Xu Juehui Inventor before: Wang Hao Inventor before: Wang Yong |
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Effective date of registration: 20201123 Address after: 221005 east side of mengjiagou market, Pipa village, Gulou District, Xuzhou City, Jiangsu Province (within 204 Fuxing North Road) Patentee after: XUZHOU RUIDA HIGH-STRENGTH FASTENER FACTORY Patentee after: XUZHOU QUALITY AND TECHNICAL SUPERVISION COMPREHENSIVE INSPECTION AND TESTING CENTER Address before: 221007, Jiangsu, Xuzhou Sanhuan North Road, opposite Castle Peak Park Patentee before: XUZHOU RUIDA HIGH-STRENGTH FASTENER FACTORY Patentee before: XUZHOU PRODUCT QUALITY SUPERVISION AND INSPECTION CENTER |
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Effective date of registration: 20201221 Address after: 221137 Jingtai Village Committee South, qingshanquan Town, Jiawang District, Xuzhou City, Jiangsu Province Patentee after: Xuzhou Ruida Equipment Manufacturing Co.,Ltd. Patentee after: XUZHOU QUALITY AND TECHNICAL SUPERVISION COMPREHENSIVE INSPECTION AND TESTING CENTER Address before: 221005 east side of mengjiagou market, Pipa village, Gulou District, Xuzhou City, Jiangsu Province (within 204 Fuxing North Road) Patentee before: XUZHOU RUIDA HIGH-STRENGTH FASTENER FACTORY Patentee before: XUZHOU QUALITY AND TECHNICAL SUPERVISION COMPREHENSIVE INSPECTION AND TESTING CENTER |
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