CN101363070A - Water quenching and air cooling modified treatment technology of 42CrMo material - Google Patents
Water quenching and air cooling modified treatment technology of 42CrMo material Download PDFInfo
- Publication number
- CN101363070A CN101363070A CNA200710094006XA CN200710094006A CN101363070A CN 101363070 A CN101363070 A CN 101363070A CN A200710094006X A CNA200710094006X A CN A200710094006XA CN 200710094006 A CN200710094006 A CN 200710094006A CN 101363070 A CN101363070 A CN 101363070A
- Authority
- CN
- China
- Prior art keywords
- air cooling
- water
- quenching
- cooled
- minutes
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Images
Landscapes
- Heat Treatment Of Articles (AREA)
- Heat Treatments In General, Especially Conveying And Cooling (AREA)
Abstract
The invention discloses a hardening and tempering and quenching treatment process of a large 42CrMo forged piece, which comprises the steps of heating up, heat preservation, quenching, high temperature tempering, etc. Quenching is carried out by a water quenching and air cooling method. The process comprises the following specific steps: when quenching, the forged piece is cooled in water for a certain time, and then is taken out for air cooling and buffer; when the surface temperature returns to 200-300 DEG C, the forged piece is put into water for water cooling again, and then is taken out for air cooling and buffer; after a plurality of cycles of water cooling and air cooling, the temperature of the forged piece is stable and not over 300 DEG C, the quenching process is completed. The treatment process provides the hardening and tempering scheme of the forged piece under the quenching condition without an oil groove, quenching oil, and the like, and improves the comprehensive properties of the forged piece.
Description
Technical field
The present invention relates to a kind of hardening and tempering method of 42CrMo material, relate in particular to a kind of water quenching and air cooling modifier treatment processing method that is applied to the 42CrMo material of heavy froging.
Background technology
The 42CrMo material is a kind of metallic substance commonly used, and the modifier treatment technology of this material generally comprises: heat up, insulation is quenched, steps such as high tempering, and modified process is prone to following problem: 1, hardness is inhomogeneous; 2, quenching easily makes crack propagation; 3, organize defective; 4, comprehensive mechanical performance is defective.Usually to small-sized 42CrMo material, can adopt oil quenching or shrend mode to improve material property.For fear of various modified problems occurring, the 42CrMo of heavy froging quenches and adopts oil quenching to improve its comprehensive mechanical performance usually, and oil quenching requires equipment relative with the oil groove level higher, security requirement is stronger, the cost of oil is also higher, pollutes also greatlyyer, so adopts the oil quenching mode to have certain limitation, lacking under the oil groove class quenching conditions or do not having under the condition of oil medium, modifier treatment technology is difficult to finish.And for large-scale 42CrMo forging, adopt the shrend mode because the cold and hot temperature difference easily forms bigger internal stress and be prone to problems such as cold cracking.Therefore, adopt water quenching and air cooling technology to be used for substituting the oil quenching mode is of practical significance very much.
Usually since behind the oil quenching to the raising of product comprehensive mechanical performance not as the shrend performance, so the present invention can be at the comprehensive mechanical performance that does not have under the condition of oil medium the heavy froging of 42CrMo material to be quenched and improve product.
Summary of the invention
The technical problem to be solved in the present invention provides a kind of water quenching and air cooling modifier treatment processing method of 42CrMo material, has solved in the modifier treatment scheme that lacks workpiece under oil groove, the quenching wet goods quenching conditions, has improved The comprehensive performance.
For solving the problems of the technologies described above, the invention provides a kind of water quenching and air cooling modifier treatment processing method of 42CrMo material, comprise the steps: to heat up, high tempering is quenched in insulation; The water quenching and air cooling mode is adopted in described quenching, when specifically comprising the steps: to quench, behind the water-cooled certain hour (generally being no more than 30 minutes), hang out the air cooling buffering, after the surface returns temperature and reach 200～300 ℃, reenter the water water-cooled, the air cooling buffering, described water-cooled and air cooling are after circulation repeatedly, and its workpiece surface returns temperature and is no more than 300 ℃ and can finishes quenching process after stable.
Compared with prior art, beneficial effect of the present invention is: the present invention adopts the water quenching and air cooling mode, by the number of times and the time of control shrend and air cooling, level when making the transformation situation of tissue go near oil quenching, prevent cold cracking because the higher generation internal stress of carbon content level is big, and the over-all properties of workpiece is improved, the internal stress of product also can be eliminated by further thermal treatment.The invention solves in the modifier treatment scheme that lacks workpiece under the oil groove class quenching conditions, improved The comprehensive performance.
Description of drawings
The present invention is further detailed explanation below in conjunction with the drawings and specific embodiments:
Fig. 1 is the temperature-time synoptic diagram of the water quenching and air cooling modifier treatment technology of 42CrMo material of the present invention, comprises the summary of technical process;
Fig. 2 is the temperature-time synoptic diagram of the water quenching and air cooling modifier treatment process implementing example of 42CrMo material of the present invention, comprises the summary of technical process.
Embodiment
Hardening and tempering process of the present invention comprises: heat up, high tempering is quenched in insulation.The 42CrMo material adopts the oil quenching mode to finish structural transformation by traditional experience quenching step, the present invention adopts the water quenching and air cooling mode, by the number of times and the time of control shrend and air cooling, the through hardening ability of water is gone near oily level, prevent because the carbon content level produces the cold cracking phenomenon, and the over-all properties of workpiece is kept.As shown in Figure 1, hardening and tempering process concrete steps of the present invention comprise: 350 ℃ of insulations, be warming up to 650 ℃ of insulations, be warming up to 850～860 ℃ again, behind the maintenance certain hour, water quenching and air cooling, high tempering and keep certain hour after finishing, cooling is come out of the stove then, air cooling is promptly finished the modified heat treatment step of 42CrMo.Wherein, when adopting water quenching and air cooling specifically to comprise the steps: to quench, behind the water-cooled certain hour, hang out the air cooling buffering, after waiting the surface to return temperature to reach certain temperature, reenter the water water-cooled.So repeatedly after the circulation, its workpiece returns can finish quenching process after temperature is stablized.Time in the water quenching and air cooling modifier treatment processing step of 42CrMo material of the present invention can change according to the change of the sectional dimension of 42CrMo product.
Embodiment
The 42CrMo product that present embodiment adopted is: product size: Φ 930mm * 17285mm, the major axis forging that weight is about 92 tons, material 42CrMo.
The product composition, %
| C | Mn | Si | S | P | Cr | Mo | Ni | Cu |
| 0.39 | 0.53 | 0.22 | 0.001 | 0.005 | 0.93 | 0.17 | 0.13 | 0.07 |
After this product roughing, be arranged in lifting in the heat treatment department, modified again.As shown in Figure 2, the water quenching and air cooling modifier treatment technology of 42CrMo material of the present invention comprises the steps:
(1) heat up: 350 ℃ of isothermals 120 minutes, rose to 650 ℃ through 360 minutes from 350 ℃, 650 ℃ of isothermals 240 minutes rose to 850 ℃ through 200 minutes from 650 ℃;
(2) insulation: 850 ℃ of isothermals 570 minutes;
(3) quench: adopts 5 recirculated water coolings and air cooling: water-cooled hung out air cooling and cushions after 22 minutes, after waiting the surface to return temperature to reach 250 ℃, entry water-cooled 10 minutes hangs out air cooling buffering, after waiting the surface to return temperature to reach 250 ℃, entry water-cooled 6 minutes hangs out air cooling buffering, after waiting the surface to return temperature to reach 250 ℃, entry water-cooled 4 minutes, hang out air cooling buffering, after waiting the surface to return temperature to reach 250 ℃, entry water-cooled 5 minutes, hang out air cooling buffering, the surface is returned temperature and is in below 200 ℃ always afterwards.
(4) high tempering: make temperature reach 600 ℃, 1680 minutes time.
Above process application is the workpiece of 930mm in equivalent cross-section, target HB (Brinell hardness)=240～280, and actual measurement HB is 260 ± 10.
Comparative Examples
The common processes means adopt the oil quenching case, and equivalent cross-section is the cylindrical shell of 450mm, the full oil cooling that quenches, and 605 ℃ of tempering, resulting mechanical performance data such as following table one:
Table one
| σb MPa | σ0.2 MPa | δ 5％ | ψ％ | AKu J |
| 785 | 633 | 19 | 57.8 | 3023 |
The present invention adopts water quenching and air cooling, and equivalent cross-section is the long draw of 900mm, 600 ℃ of tempering, and resulting mechanical performance data such as following table two:
Table two
| σb MPa | σ0.2 MPa | δ 5％ | ψ％ | AKu J |
| 810 | 645 | 18.4 | 64.1 | 118，109 |
| 823 | 670 | 21 | 66.5 | 112，109 |
By table one and table two contrast, as can be seen,, make the composite technology performance of product obtain obvious improvement by water quenching and air cooling.The internal stress of product also can be eliminated by further thermal treatment.The water quenching and air cooling technology of 42CrMo can realize, and good effect is arranged.
Claims (3)
1. the water quenching and air cooling modifier treatment processing method of a 42CrMo material comprises the steps: to heat up, and high tempering is quenched in insulation; It is characterized in that: the water quenching and air cooling mode is adopted in described quenching, when specifically comprising the steps: to quench, after water-cooled is no more than 30 minutes, hang out the air cooling buffering, after the surface returns temperature and reach 200～300 ℃, reenter the water water-cooled, the air cooling buffering, described water-cooled and air cooling are after circulation repeatedly, and its workpiece surface returns temperature and is no more than 300 ℃ and can finishes quenching process after stable.
2. the water quenching and air cooling modifier treatment processing method of 42CrMo material according to claim 1 is characterized in that, described water-cooled and air cooling can be finished quenching process through 5 circulations.
3. the water quenching and air cooling modifier treatment processing method of 42CrMo material according to claim 1 and 2, it is characterized in that, described 5 water-cooleds of quenching employing and air cooling circulation, specifically comprise the steps: water-cooled after 22 minutes, air cooling buffering is after waiting the surface to return temperature to reach 250 ℃, entry water-cooled 10 minutes, air cooling buffering, after waiting the surface to return temperature to reach 250 ℃, entry water-cooled 6 minutes, the air cooling buffering, after the surface returns temperature and reaches 250 ℃, entry water-cooled 4 minutes, air cooling buffering, after returning temperature and reach 250 ℃ on the surface, entry water-cooled 5 minutes, air cooling buffering, the surface is returned temperature and is in below 200 ℃ always afterwards.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA200710094006XA CN101363070A (en) | 2007-08-07 | 2007-08-07 | Water quenching and air cooling modified treatment technology of 42CrMo material |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA200710094006XA CN101363070A (en) | 2007-08-07 | 2007-08-07 | Water quenching and air cooling modified treatment technology of 42CrMo material |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN101363070A true CN101363070A (en) | 2009-02-11 |
Family
ID=40389672
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNA200710094006XA Pending CN101363070A (en) | 2007-08-07 | 2007-08-07 | Water quenching and air cooling modified treatment technology of 42CrMo material |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN101363070A (en) |
Cited By (19)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101775555A (en) * | 2010-03-18 | 2010-07-14 | 江阴南工锻造有限公司 | Forging alloy steel and manufacturing process thereof |
| CN101831530A (en) * | 2010-04-29 | 2010-09-15 | 哈尔滨工程大学 | Thermal treatment process for improving comprehensive mechanical property of low-alloy high-strength steel |
| CN101962707A (en) * | 2010-10-28 | 2011-02-02 | 攀钢集团钢铁钒钛股份有限公司 | Method for producing 42CrMo steel seamless steel tube |
| CN102644647A (en) * | 2012-04-23 | 2012-08-22 | 徐尚仁 | Martensite stainless steel anti-theft screw manufactured by quenching hardness-increasing and brittle non-increasing process |
| CN102732701A (en) * | 2012-07-17 | 2012-10-17 | 新兴铸管股份有限公司 | Method for carrying out quenching on bimetal tube with outer low-carbon steel layer and inner high-carbon-chromium bearing steel layer |
| CN102776339A (en) * | 2012-07-16 | 2012-11-14 | 张家港海锅重型锻件有限公司 | Manufacture technology of 40 CrNiMo steel forgings |
| CN103173604A (en) * | 2013-04-12 | 2013-06-26 | 中原特钢股份有限公司 | Thermal treatment method for improving low-temperature impact work of air blower main shaft |
| CN103305672A (en) * | 2013-06-27 | 2013-09-18 | 洛阳中创重型机械有限公司 | Heat treatment process for ultra-large type tube plate forge piece of pressure container |
| CN103820623A (en) * | 2012-11-16 | 2014-05-28 | 李彬 | Heat treatment process of 42CrMoE piston rod |
| CN104152641A (en) * | 2014-08-17 | 2014-11-19 | 成都亨通兆业精密机械有限公司 | Carrier roller heat treatment technology |
| CN104152640A (en) * | 2014-08-17 | 2014-11-19 | 成都亨通兆业精密机械有限公司 | Carrier roller processing technique conducive to reducing heat treatment defects |
| CN104313288A (en) * | 2014-11-12 | 2015-01-28 | 通裕重工股份有限公司 | Heat treatment process for 42CrMo wind power spindle |
| CN105543465A (en) * | 2015-12-23 | 2016-05-04 | 山东伊莱特重工股份有限公司 | Controlled cooling quenching tempering technology of yaw gear of large wind driven generator |
| CN105567914A (en) * | 2015-11-22 | 2016-05-11 | 天津华建天恒传动有限责任公司 | Novel process of heat treatment after forging |
| CN107739781A (en) * | 2017-10-30 | 2018-02-27 | 山东伊莱特重工股份有限公司 | A kind of method that yawing gear ring modifier treatment is carried out using tempering product line |
| CN108866285A (en) * | 2018-09-11 | 2018-11-23 | 武钢集团襄阳重型装备材料有限公司 | A kind of heavy die block mould steel Tempering and Quenching method |
| CN109161644A (en) * | 2018-09-11 | 2019-01-08 | 武钢集团襄阳重型装备材料有限公司 | A kind of heavy die block mould steel process for quenching |
| CN111069495A (en) * | 2019-12-30 | 2020-04-28 | 太原重工股份有限公司 | Manufacturing process of alloy steel forging with extra-large section |
| CN113817898A (en) * | 2021-07-12 | 2021-12-21 | 承德建龙特殊钢有限公司 | Method for improving structure performance of chromium-molybdenum steel |
-
2007
- 2007-08-07 CN CNA200710094006XA patent/CN101363070A/en active Pending
Cited By (23)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101775555A (en) * | 2010-03-18 | 2010-07-14 | 江阴南工锻造有限公司 | Forging alloy steel and manufacturing process thereof |
| CN101775555B (en) * | 2010-03-18 | 2011-07-20 | 江阴南工锻造有限公司 | Forging alloy steel and manufacturing process thereof |
| CN101831530A (en) * | 2010-04-29 | 2010-09-15 | 哈尔滨工程大学 | Thermal treatment process for improving comprehensive mechanical property of low-alloy high-strength steel |
| CN101962707A (en) * | 2010-10-28 | 2011-02-02 | 攀钢集团钢铁钒钛股份有限公司 | Method for producing 42CrMo steel seamless steel tube |
| CN101962707B (en) * | 2010-10-28 | 2012-05-30 | 攀钢集团钢铁钒钛股份有限公司 | Method for producing 42CrMo steel seamless steel tube |
| CN102644647A (en) * | 2012-04-23 | 2012-08-22 | 徐尚仁 | Martensite stainless steel anti-theft screw manufactured by quenching hardness-increasing and brittle non-increasing process |
| CN102776339A (en) * | 2012-07-16 | 2012-11-14 | 张家港海锅重型锻件有限公司 | Manufacture technology of 40 CrNiMo steel forgings |
| CN102732701A (en) * | 2012-07-17 | 2012-10-17 | 新兴铸管股份有限公司 | Method for carrying out quenching on bimetal tube with outer low-carbon steel layer and inner high-carbon-chromium bearing steel layer |
| CN103820623A (en) * | 2012-11-16 | 2014-05-28 | 李彬 | Heat treatment process of 42CrMoE piston rod |
| CN103173604A (en) * | 2013-04-12 | 2013-06-26 | 中原特钢股份有限公司 | Thermal treatment method for improving low-temperature impact work of air blower main shaft |
| CN103305672B (en) * | 2013-06-27 | 2015-01-28 | 洛阳中创重型机械有限公司 | Heat treatment process for ultra-large type tube plate forge piece of pressure container |
| CN103305672A (en) * | 2013-06-27 | 2013-09-18 | 洛阳中创重型机械有限公司 | Heat treatment process for ultra-large type tube plate forge piece of pressure container |
| CN104152641A (en) * | 2014-08-17 | 2014-11-19 | 成都亨通兆业精密机械有限公司 | Carrier roller heat treatment technology |
| CN104152640A (en) * | 2014-08-17 | 2014-11-19 | 成都亨通兆业精密机械有限公司 | Carrier roller processing technique conducive to reducing heat treatment defects |
| CN104313288A (en) * | 2014-11-12 | 2015-01-28 | 通裕重工股份有限公司 | Heat treatment process for 42CrMo wind power spindle |
| CN105567914A (en) * | 2015-11-22 | 2016-05-11 | 天津华建天恒传动有限责任公司 | Novel process of heat treatment after forging |
| CN105543465A (en) * | 2015-12-23 | 2016-05-04 | 山东伊莱特重工股份有限公司 | Controlled cooling quenching tempering technology of yaw gear of large wind driven generator |
| CN107739781A (en) * | 2017-10-30 | 2018-02-27 | 山东伊莱特重工股份有限公司 | A kind of method that yawing gear ring modifier treatment is carried out using tempering product line |
| CN108866285A (en) * | 2018-09-11 | 2018-11-23 | 武钢集团襄阳重型装备材料有限公司 | A kind of heavy die block mould steel Tempering and Quenching method |
| CN109161644A (en) * | 2018-09-11 | 2019-01-08 | 武钢集团襄阳重型装备材料有限公司 | A kind of heavy die block mould steel process for quenching |
| CN111069495A (en) * | 2019-12-30 | 2020-04-28 | 太原重工股份有限公司 | Manufacturing process of alloy steel forging with extra-large section |
| CN111069495B (en) * | 2019-12-30 | 2021-07-09 | 太原重工股份有限公司 | Manufacturing process of alloy steel forging with extra-large section |
| CN113817898A (en) * | 2021-07-12 | 2021-12-21 | 承德建龙特殊钢有限公司 | Method for improving structure performance of chromium-molybdenum steel |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN101363070A (en) | Water quenching and air cooling modified treatment technology of 42CrMo material | |
| CN104532154A (en) | High-hardness high-polishing pre-hardening plastic die steel and manufacture technology thereof | |
| CN105385832A (en) | Surface quenching and tempering combined heat processing technology for aluminum alloy rolling mill work roll | |
| CN108559934A (en) | A kind of cryogenic treatment process of TC6 titanium alloy forgings | |
| CN104313294A (en) | Thermal treatment method for dimensional stability of Cr4Mo4V steel bearing ring | |
| CN105648172A (en) | Heat treatment process method for 0Cr13Ni8Mo2Al steel | |
| CN101538643A (en) | Process for quenching H13 steel by high-pressure gas stepped quick cooling | |
| CN107964578A (en) | A kind of automobile die steel processing technology | |
| KR20100091973A (en) | A process for forming steel | |
| CN103131824A (en) | Quick cooling quenching technique for electroslag smelting casting large section crankshaft | |
| US20150252460A1 (en) | Method for improving mechanical properties of aluminum alloy castings | |
| CN101956144A (en) | Heat treatment method for manufacturing Martensitic-ferrite plastic mould steel | |
| CN105436275A (en) | Hot-stamping forming process of low-carbon boron alloy steel automobile reinforcing plate | |
| CN106555037B (en) | A kind of heat demoulding stress relief annealing method of steel ingot containing CrNi | |
| CN103667619B (en) | The sub-temperature quenching process of Cr5MoV cold work die steel | |
| CN106048146A (en) | Thermal treatment method of high-performance rotor forging | |
| CN113699337A (en) | Heat treatment process for continuous casting large round billet of 9Cr heat-resistant steel | |
| CN103060538A (en) | Setting method in sections of high alloy steel vacuum heat treatment high-temperature region parameters | |
| CN101798620B (en) | Thermal treatment method for large-size complex cross section mold for extruding sectional material of train body | |
| CN114378234B (en) | NS3303 corrosion-resistant alloy and forging method thereof | |
| CN106319186B (en) | A kind of 45 steel roller axis high temperature, short time Q-tempering techniques | |
| CN114959215B (en) | 7-series aluminum alloy hot extrusion die steel and heat treatment method thereof | |
| CN103710498A (en) | Heat treatment technology for forging coupler yoke | |
| CN115354119B (en) | Forging heat treatment method for secondary hardening profile steel | |
| CN104032107A (en) | Production process for 4330V forging used for deep-sea oil extraction equipment |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Open date: 20090211 |