CN102776333A - Process for manufacturing 20Mn2 steel forgings - Google Patents
Process for manufacturing 20Mn2 steel forgings Download PDFInfo
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- CN102776333A CN102776333A CN2012102456503A CN201210245650A CN102776333A CN 102776333 A CN102776333 A CN 102776333A CN 2012102456503 A CN2012102456503 A CN 2012102456503A CN 201210245650 A CN201210245650 A CN 201210245650A CN 102776333 A CN102776333 A CN 102776333A
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Abstract
The invention relates to a process for manufacturing 20Mn2 steel forgings. The process comprises a first step of quenching for the first time: firstly, raising the temperature of a workpiece to be 650 plus or minus 10 DEG C for carrying out heat preservation, quickly raising the temperature of the workpiece to be 800 plus or minus 5 DEG C for carrying out heat preservation after the temperature is kept for a long time, and water-cooling the workpiece after the temperature is kept for a long time; a second step of quenching for the second time: raising the temperature of the workpiece subjected to the quenching for the first time to be 650 plus or minus 10 DEG C for carrying out heat preservation; quickly raising the temperature of the workpiece to be 910 plus or minus 5 DEG C for carrying out heat preservation after the temperature is kept for a long time; water-cooling the workpiece after the temperature is kept for a long time; raising the temperature of the workpiece subjected to the quenching for the second time to be 340 plus or minus 10 DEG C for carrying out heat preservation; quickly raising the temperature of the workpiece to be 560 plus or minus 5 DEG C for carrying out heat preservation after the temperature is kept for a long time; and air-cooling the workpiece to reach normal temperature to prepare the steel forgings after the temperature is kept for a long time.
Description
Technical field
The present invention relates to a kind of ME of 20Mn2 steel forgings.
Background technology
The 20Mn2 steel forgings is mainly used in oil production equipment field, and technical requirement is very high, and particularly a lot of to the conventional height that requires of the yield strength ratio of forging, by conventional thermal treatment process production, the mechanical property of forging is difficult to satisfy working conditions.
Summary of the invention
Technical problem to be solved by this invention is: a kind of ME of 20Mn2 steel forgings is provided, and the ys of its prepared steel forgings and mechanical property can satisfy the request for utilization in oil production equipment field.
For addressing the above problem, the technical scheme that the present invention adopts is: the ME of 20Mn2 steel forgings comprises the steps: to quench for the first time: at first workpiece is warming up to 650 ± 10 ℃ and carries out the insulation first time; Soaking time is directly proportional with the thickness of workpiece for the first time, and when the thickness of workpiece was 1 inch, soaking time was 0.5～1 hour; After for the first time being incubated for some time, heating as quickly as possible and carry out being incubated the second time to 800 ± 5 ℃, soaking time is directly proportional with the thickness of workpiece for the second time; When the thickness of workpiece is 1 inch; Soaking time is 0.5～1 hour, and carry out water-cooled after being incubated for some time the second time;
Quench for the second time: the workpiece after quenching is for the first time heated once more to 650 ± 10 ℃ and is incubated for the third time, and soaking time is directly proportional with the thickness of workpiece for the third time, when the thickness of workpiece is 1 inch; Soaking time is 0.5～1 hour, be incubated for some time for the third time after, heat as quickly as possible to 910 ± 5 ℃ carry out the 4th time the insulation; The 4th time soaking time is directly proportional with the thickness of workpiece, and when the thickness of workpiece was 1 inch, soaking time was 0.5～1 hour; After the 4th insulation for some time, carry out water-cooled;
Workpiece after quenching is for the second time heated once more to 340 ± 10 ℃ and is carried out the 5th insulation, and the 5th time soaking time is directly proportional with the thickness of workpiece, when the thickness of workpiece is 1 inch; Soaking time is 0.5～1 hour, the 5th time the insulation for some time after, heat as quickly as possible to 560 ± 5 ℃ carry out the 6th time the insulation; The 6th time soaking time is directly proportional with the thickness of workpiece, and when the thickness of workpiece was 1 inch, soaking time was 1～1.5 hour; After the 6th insulation for some time, air cooling to normal temperature obtains steel forgings.
Quench said for the first time, when quenching for the second time, the workpiece back entry rapidly of coming out of the stove, and move left and right and play up and down, water temperature is lower than 38 ℃.
The invention has the beneficial effects as follows: the ME of above-mentioned 20Mn2 steel forgings; Before modified, carry out sub-temperature quenching process earlier, eliminated banded structure and the coarse-grain of forging the back workpiece, make the grain refining of steel; Improve the yield tensile ratio of steel forgings, promptly improved the ys of steel forgings.In addition, adopt rapid heating, increase the superheating temperature of steel, thereby improve nucleation rate, make the crystal refinement, improved the ys and the impelling strength of steel through transformation temperature.Adopt unique quenching technology, quenching temperature adopts higher limit, increases austenitic stability, improves the hardening capacity of steel relatively, has improved the comprehensive mechanical property of steel greatly, has given full play to the potentiality of material.
Description of drawings
Fig. 1 is a process curve synoptic diagram of the present invention;
Embodiment
Through specific embodiment the ME of 20Mn2 steel forgings of the present invention is done further to describe in detail below.
As shown in Figure 1, the ME of 20Mn2 steel forgings comprises the steps: to quench for the first time: at first workpiece is warming up to 650 ± 10 ℃ and carries out the insulation first time; Soaking time is directly proportional with the thickness of workpiece for the first time, and when the thickness of workpiece was 1 inch, soaking time was 0.5～1 hour; After for the first time being incubated for some time, heating as quickly as possible and carry out being incubated the second time to 800 ± 5 ℃, soaking time is directly proportional with the thickness of workpiece for the second time; When the thickness of workpiece is 1 inch; Soaking time is 0.5～1 hour, and carry out water-cooled after being incubated for some time the second time;
Quench for the second time: the workpiece after quenching is for the first time heated once more to 650 ± 10 ℃ and is incubated for the third time, and soaking time is directly proportional with the thickness of workpiece for the third time, when the thickness of workpiece is 1 inch; Soaking time is 0.5～1 hour, be incubated for some time for the third time after, heat as quickly as possible to 910 ± 5 ℃ carry out the 4th time the insulation; The 4th time soaking time is directly proportional with the thickness of workpiece, and when the thickness of workpiece was 1 inch, soaking time was 0.5～1 hour; After the 4th insulation for some time, carry out water-cooled;
Workpiece after quenching is for the second time heated once more to 340 ± 10 ℃ and is carried out the 5th insulation, and the 5th time soaking time is directly proportional with the thickness of workpiece, when the thickness of workpiece is 1 inch; Soaking time is 0.5～1 hour, the 5th time the insulation for some time after, heat as quickly as possible to 560 ± 5 ℃ carry out the 6th time the insulation; The 6th time soaking time is directly proportional with the thickness of workpiece, and when the thickness of workpiece was 1 inch, soaking time was 1～1.5 hour; After the 6th insulation for some time, air cooling to normal temperature obtains steel forgings.
Quench said for the first time, when quenching for the second time, the workpiece back entry rapidly of coming out of the stove, and move left and right and play up and down, water temperature is lower than 38 ℃.
The ME of above-mentioned 20Mn2 steel forgings is carried out sub-temperature quenching process earlier before modified, eliminated banded structure and the coarse-grain of forging the back workpiece, makes the grain refining of steel, has improved the yield tensile ratio of steel forgings, has promptly improved the ys of steel forgings.In addition, adopt rapid heating, increase the superheating temperature of steel, thereby improve nucleation rate, make the crystal refinement, improved the ys and the impelling strength of steel through transformation temperature.Adopt unique quenching technology, quenching temperature adopts higher limit, increases austenitic stability, improves the hardening capacity of steel relatively, has improved the comprehensive mechanical property of steel greatly, has given full play to the potentiality of material.
The above embodiments are the principle and the effect thereof of illustrative the invention only, and the embodiment of part utilization, but not is used to limit the present invention; Should be pointed out that for the person of ordinary skill of the art under the prerequisite that does not break away from the invention design, can also make some distortion and improvement, these all belong to protection scope of the present invention.
Claims (2)
1.20Mn2 the ME of steel forgings is characterized in that: comprise the steps:
Quench for the first time: at first workpiece is warming up to 650 ± 10 ℃ and carries out the insulation first time, soaking time is directly proportional with the thickness of workpiece for the first time, when the thickness of workpiece is 1 inch; Soaking time is 0.5～1 hour, for the first time be incubated for some time after, heat as quickly as possible and carry out being incubated second time to 800 ± 5 ℃; Soaking time is directly proportional with the thickness of workpiece for the second time, and when the thickness of workpiece was 1 inch, soaking time was 0.5～1 hour; After for the second time being incubated for some time, carry out water-cooled;
Quench for the second time: the workpiece after quenching is for the first time heated once more to 650 ± 10 ℃ and is incubated for the third time, and soaking time is directly proportional with the thickness of workpiece for the third time, when the thickness of workpiece is 1 inch; Soaking time is 0.5～1 hour, be incubated for some time for the third time after, heat as quickly as possible to 910 ± 5 ℃ carry out the 4th time the insulation; The 4th time soaking time is directly proportional with the thickness of workpiece, and when the thickness of workpiece was 1 inch, soaking time was 0.5～1 hour; After the 4th insulation for some time, carry out water-cooled;
Workpiece after quenching is for the second time heated once more to 340 ± 10 ℃ and is carried out the 5th insulation, and the 5th time soaking time is directly proportional with the thickness of workpiece, when the thickness of workpiece is 1 inch; Soaking time is 0.5～1 hour, the 5th time the insulation for some time after, heat as quickly as possible to 560 ± 5 ℃ carry out the 6th time the insulation; The 6th time soaking time is directly proportional with the thickness of workpiece, and when the thickness of workpiece was 1 inch, soaking time was 1～1.5 hour; After the 6th insulation for some time, air cooling to normal temperature obtains steel forgings.
2. the ME of 20Mn2 steel forgings according to claim 1 is characterized in that: quenches said for the first time, when quenching for the second time, and the workpiece back entry rapidly of coming out of the stove, and move left and right and play up and down, water temperature is lower than 38 ℃.
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105945528A (en) * | 2016-06-20 | 2016-09-21 | 安徽省瑞杰锻造有限责任公司 | Processing technology of upper V-shaped anvil and lower V-shaped anvil of electro-hydraulic hammer |
| CN110229947A (en) * | 2018-11-07 | 2019-09-13 | 林州凤宝管业有限公司 | A kind of vehicle bridge pipe shaft furnace process for quenching |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1078497A (en) * | 1993-06-17 | 1993-11-17 | 冶金工业部钢铁研究总院 | The quenching method of metallic card clothing |
| CN101787419A (en) * | 2009-12-25 | 2010-07-28 | 中原特钢股份有限公司 | Heat treatment process of AISI4340 steel forgings |
| CN101880831A (en) * | 2010-06-13 | 2010-11-10 | 东北大学 | High-strength-and-toughness low alloy wear resistant steel and manufacturing method thereof |
| CN102021304A (en) * | 2010-12-07 | 2011-04-20 | 无锡宏达重型锻压有限公司 | Heat processing technology for super-standard large-section pressure vessel tube plate |
| CN102268609A (en) * | 2011-08-10 | 2011-12-07 | 上海海隆石油管材研究所 | Ultrahigh-strength high-toughness drill rod pipe body and heat treatment process thereof |
| CN102534372A (en) * | 2012-01-13 | 2012-07-04 | 北京科技大学 | Preparation method of P110-grade expansion tube for exploiting petroleum and gas |
-
2012
- 2012-07-16 CN CN2012102456503A patent/CN102776333A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1078497A (en) * | 1993-06-17 | 1993-11-17 | 冶金工业部钢铁研究总院 | The quenching method of metallic card clothing |
| CN101787419A (en) * | 2009-12-25 | 2010-07-28 | 中原特钢股份有限公司 | Heat treatment process of AISI4340 steel forgings |
| CN101880831A (en) * | 2010-06-13 | 2010-11-10 | 东北大学 | High-strength-and-toughness low alloy wear resistant steel and manufacturing method thereof |
| CN102021304A (en) * | 2010-12-07 | 2011-04-20 | 无锡宏达重型锻压有限公司 | Heat processing technology for super-standard large-section pressure vessel tube plate |
| CN102268609A (en) * | 2011-08-10 | 2011-12-07 | 上海海隆石油管材研究所 | Ultrahigh-strength high-toughness drill rod pipe body and heat treatment process thereof |
| CN102534372A (en) * | 2012-01-13 | 2012-07-04 | 北京科技大学 | Preparation method of P110-grade expansion tube for exploiting petroleum and gas |
Non-Patent Citations (2)
| Title |
|---|
| 王松林: "热处理方法对碳钢艉轴力学性能的影响", 《大型铸锻件》 * |
| 王松林等: "消除钢管中带状组织的热处理", 《热处理技术与装备》 * |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105945528A (en) * | 2016-06-20 | 2016-09-21 | 安徽省瑞杰锻造有限责任公司 | Processing technology of upper V-shaped anvil and lower V-shaped anvil of electro-hydraulic hammer |
| CN105945528B (en) * | 2016-06-20 | 2018-05-08 | 安徽省瑞杰锻造有限责任公司 | The processing technology of V-type anvil above and below a kind of Single arm |
| CN110229947A (en) * | 2018-11-07 | 2019-09-13 | 林州凤宝管业有限公司 | A kind of vehicle bridge pipe shaft furnace process for quenching |
| CN110229947B (en) * | 2018-11-07 | 2021-10-08 | 林州凤宝管业有限公司 | Axle tube well type furnace quenching method |
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Application publication date: 20121114 |