CN103290179B - Thermal treatment method for medium carbon structural alloy steel with low hardenability - Google Patents
Thermal treatment method for medium carbon structural alloy steel with low hardenability Download PDFInfo
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- CN103290179B CN103290179B CN201310220748.8A CN201310220748A CN103290179B CN 103290179 B CN103290179 B CN 103290179B CN 201310220748 A CN201310220748 A CN 201310220748A CN 103290179 B CN103290179 B CN 103290179B
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- thermal treatment
- treatment method
- trimming
- waste heat
- alloy steel
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- 238000000034 method Methods 0.000 title claims abstract description 15
- 229910052799 carbon Inorganic materials 0.000 title claims abstract description 8
- 229910000851 Alloy steel Inorganic materials 0.000 title claims abstract description 6
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 title claims abstract description 5
- 238000007669 thermal treatment Methods 0.000 title abstract 3
- 238000010791 quenching Methods 0.000 claims abstract description 9
- 238000005496 tempering Methods 0.000 claims abstract description 8
- 239000002918 waste heat Substances 0.000 claims abstract description 8
- 238000005242 forging Methods 0.000 claims abstract description 7
- 238000010438 heat treatment Methods 0.000 claims abstract description 6
- 238000009966 trimming Methods 0.000 claims abstract description 6
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 6
- 238000001816 cooling Methods 0.000 claims description 7
- 230000000171 quenching effect Effects 0.000 abstract description 6
- FBPFZTCFMRRESA-JGWLITMVSA-N D-glucitol Chemical compound OC[C@H](O)[C@@H](O)[C@H](O)[C@H](O)CO FBPFZTCFMRRESA-JGWLITMVSA-N 0.000 abstract description 2
- 238000005452 bending Methods 0.000 abstract description 2
- 239000007769 metal material Substances 0.000 abstract description 2
- 238000000465 moulding Methods 0.000 abstract 2
- 238000005422 blasting Methods 0.000 abstract 1
- 210000005003 heart tissue Anatomy 0.000 abstract 1
- 238000003303 reheating Methods 0.000 abstract 1
- 238000005336 cracking Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 239000000654 additive Substances 0.000 description 1
- 230000000996 additive effect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 238000007689 inspection Methods 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
- 239000006249 magnetic particle Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 229920000620 organic polymer Polymers 0.000 description 1
- 238000004886 process control Methods 0.000 description 1
- 239000000779 smoke Substances 0.000 description 1
- 238000002791 soaking Methods 0.000 description 1
- 238000003756 stirring Methods 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 230000009466 transformation Effects 0.000 description 1
Landscapes
- Heat Treatment Of Articles (AREA)
- Heat Treatments In General, Especially Conveying And Cooling (AREA)
Abstract
The invention relates to a thermal treatment method of metal materials, and in particular relates to a thermal treatment method for medium carbon structural alloy steel with low hardenability. The method provided by the invention comprises the following implementing processes: blanking; heating; prefabricating blanks; die forging and molding; correcting and trimming; quenching; tempering; and shot blasting. The heating temperature after blanking is 1100-1140 DEG C, and the product stops in the air for about 10 seconds after the processes of prefabricating blanks, die forging and molding, correcting and trimming, and is placed in a waste heat groove to quench. The quenching medium in the waste heat groove consists of a 5-7% HT-01 liquor and 93-95% water. Through such treatment, the hardness of the product is controlled within 33-38HRC, the heart tissue can meet 100% tempered sorbite or 100% tempered troostite, and the bending strength is improved by about 10%. No cracked parts are available, and the demand of clients is fully met or over-met. Reheating conventionally required is avoided, consumptions such as electric energy are reduced, the labor time is shortened, and the working environment is improved.
Description
Technical field
The present invention relates to a kind of heat treating method of metallic substance, the heat treating method of especially low hardening capacity medium carbon structural alloy steel.
Background technology
In prior art, normally cooling after forged is put into chamber type electric resistance furnace to the product of room temperature, reheat 820-840 DEG C and be incubated 1 hour, after coming out of the stove, in water, stir quenching, then through 430-450 DEG C of insulation tempering in 2 hours, air cooling of coming out of the stove.Adopt above method, product cost is high, and the production cycle is long, and labour intensity is large, and Qualified Products Rate is low, for low hardening capacity structural alloy steel, oil quenching cannot ensure that hardness is qualified, and full hardening deepness is also shallow, although take shrend to reach hardness requirement, but heart portion cannot through hardening and do not reach technical requirements completely, and shrend easily causes workpiece to ftracture, so must 100% magnetic-particle inspection.
Summary of the invention
The technical problem to be solved in the present invention is to provide a kind of heat treating method that can reduce costs, improve product hardening capacity and intensity.
In order to solve the problems of the technologies described above, implementing process of the present invention comprises: blanking-heating-precast billet-die-forging forming-correction trimming-quenching-tempering-ball blast, the temperature of blanking post-heating is 1100-1140 DEG C, product is after precast billet, die-forging forming and correction trimming, stop about 10S in atmosphere, just put into waste heat groove to quench, quenchant in waste heat groove is made up of the HT-01 solution of 5-7 ﹪ and the water of 93-95 ﹪, the temperature of tempering process controls as 450-470 DEG C, be incubated 2 hours, air cooling of then coming out of the stove.
By processing like this and can product hardness being controlled between 33 ~ 38HRC, core structure can reach 100% tempered sorbite or 100% tempering troostite, bending strength improves about 10%, without cracking part, meet completely and higher than the requirement of client, eliminate heating again required routinely, reduce the consumption such as electric energy, decrease man hour of labour, improve Working environment.
Embodiment
1, bar heats through middle frequency furnace, in order to retain the highly malleablized effect of high temperature deformation forged harding, Heating temperature being down to 1100-1140 DEG C by 1180 DEG C of routine, detecting, then precast billet, die-forging forming with infrared thermometer, correct trimming.
2, after trimming, product stops about 10S in atmosphere, ensures that workpiece temperature controls between 820 ~ 860 DEG C, then it is put into waste heat groove and quenches.Quenchant in interior waste heat groove is made up of the HT-01 solution of 5-7 ﹪ and the water of 93-95 ﹪.HT-01 solution is fused by water soluble organic polymer polymkeric substance and a small amount of additive to form, and working fluid does not burn, without oil smoke, without atmospheric pollution.This quenchant can ensure workpiece, and high-temperature area cooling rate is fast, structural transformation region cooling rate is slow, thus avoids quenching strain and cracking.
3, the workpiece after quenching is put into the tempering of well formula tempering stove, tempering temperature 460 ± 10 DEG C, soaking time 2 hours, every stove fills 1200, air cooling of then coming out of the stove.
Claims (1)
1. the heat treating method of one kind low hardening capacity medium carbon structural alloy steel, its implementing process comprises: blanking-heating-precast billet-die-forging forming-correction trimming-quenching-tempering-ball blast, it is characterized in that: the temperature of blanking post-heating is 1100-1140 DEG C, product is through precast billet, die-forging forming and correcting after trimming, stop about 10s in atmosphere, just put into waste heat groove to quench, quenchant in waste heat groove is made up of the HT-01 solution of 5-7 ﹪ and the water of 93-95 ﹪, the temperature of described tempering process is 450-470 DEG C, be incubated 2 hours, then to come out of the stove air cooling.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310220748.8A CN103290179B (en) | 2013-06-05 | 2013-06-05 | Thermal treatment method for medium carbon structural alloy steel with low hardenability |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310220748.8A CN103290179B (en) | 2013-06-05 | 2013-06-05 | Thermal treatment method for medium carbon structural alloy steel with low hardenability |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN103290179A CN103290179A (en) | 2013-09-11 |
| CN103290179B true CN103290179B (en) | 2015-05-13 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201310220748.8A Active CN103290179B (en) | 2013-06-05 | 2013-06-05 | Thermal treatment method for medium carbon structural alloy steel with low hardenability |
Country Status (1)
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| CN (1) | CN103290179B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106011395A (en) * | 2016-07-12 | 2016-10-12 | 山东鲁联机械制造有限公司 | Heat treatment technology of alloy structure steel through remnant forging thermal quenching |
-
2013
- 2013-06-05 CN CN201310220748.8A patent/CN103290179B/en active Active
Non-Patent Citations (2)
| Title |
|---|
| "42CrMo钢平衡轴锻件的锻造余热淬火";陈希原;《金属热处理》;20081231;第33卷(第3期);第94-96页 * |
| "锻造余热淬火工艺的应用前景";吴元徽;《热加工工艺》;20100930;第39卷(第18期);第195-196、199页 * |
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| Publication number | Publication date |
|---|---|
| CN103290179A (en) | 2013-09-11 |
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| PE01 | Entry into force of the registration of the contract for pledge of patent right |
Denomination of invention: Thermal treatment method for medium carbon structural alloy steel with low hardenability Effective date of registration: 20161226 Granted publication date: 20150513 Pledgee: Hengyang Huarong Xiangjiang bank Limited by Share Ltd steamed South Branch Pledgor: Hengyang Pengrun Forging Co., Ltd. Registration number: 2016430000066 |
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Date of cancellation: 20171102 Granted publication date: 20150513 Pledgee: Hengyang Huarong Xiangjiang bank Limited by Share Ltd steamed South Branch Pledgor: Hengyang Pengrun Forging Co., Ltd. Registration number: 2016430000066 |
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Denomination of invention: Thermal treatment method for medium carbon structural alloy steel with low hardenability Effective date of registration: 20171117 Granted publication date: 20150513 Pledgee: Shanghai Pudong hair bank Limited by Share Ltd Hengyang branch Pledgor: Hengyang Pengrun Forging Co., Ltd. Registration number: 2017430000087 |
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Date of cancellation: 20200608 Granted publication date: 20150513 Pledgee: Shanghai Pudong hair bank Limited by Share Ltd. Hengyang branch Pledgor: HENGYANG PENGRUN FORGING Co.,Ltd. Registration number: 2017430000087 |
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Effective date of registration: 20200721 Address after: 421311 Huangjin Road, new county seat, Hengnan County, Hengyang City, Hunan Province Patentee after: HUNAN GOZ PRECISION MACHINERY Co.,Ltd. Address before: 421001 Hunan Province, Hengyang Zhengxiang District No. 79 South River Line Patentee before: HENGYANG PENGRUN FORGING Co.,Ltd. |
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