CN101857914A - Heat treatment method for materials of 25CrMo alloy steel hollow car axle for high-speed railway passenger trains - Google Patents
Heat treatment method for materials of 25CrMo alloy steel hollow car axle for high-speed railway passenger trains Download PDFInfo
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- CN101857914A CN101857914A CN201010188588A CN201010188588A CN101857914A CN 101857914 A CN101857914 A CN 101857914A CN 201010188588 A CN201010188588 A CN 201010188588A CN 201010188588 A CN201010188588 A CN 201010188588A CN 101857914 A CN101857914 A CN 101857914A
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Abstract
The invention belongs to the technical field of heat treatment, relating to a heat treatment method for materials of a 25CrMo alloy steel hollow car axle for high-speed railway passenger trains. The heat treatment method is characterized in that 900 to 930 DEG C pretreatment is carried out on 25CrMo steel of the size of an axle blank, quench treatment is carried out at 880 to 930 DEG C, and then tempering treatment is carried out at 630 to 680 DEG C. The invention has the advantages that the mechanical property of the developed 25CrMo alloy steel hollow car axle for the high-speed railway passenger trains meets the EN 13261 standard requirement, and especially the fatigue strength of a smooth sample and the fatigue strength of a notch sample are both higher than the standard values. The invention provides the technical assurance of the heat treatment technique for the final production of the hollow car axle with the high speed of 200 to 350 km/h.
Description
Technical field
The present invention relates to the thermal treatment of the 25 CrMo alloy steel hollow car axle for high-speed railway passenger trains of speed per hour 200-350 kilometer, belong to high-speed railway passenger steel alloy hole-bored axle from end to end material hot treatment technology field.
Background technology
High-speed railway is meant that the highest operation speed per hour surpasses the railway of 200km, and it not only brings the development of traditional railway industry, also drives the recovery of other industries, promotes the Economic development of entire society.In order to satisfy domestic growing transportation by railroad needs, China Railway repeatedly raises speed.When speed per hour was lower than 160km, railway axle mostly was the solid axle of medium carbon steel normalizing treatment, and China has had correlation technique.But before the present invention announces, the main dependence on import of high speed (more than 200 kilometers/hour) passenger vehicle axletree of Chinese Railway operation, domestic no correlation technique.For speed per hour 200km and the bullet train axletree more than the 200km, the general technological standard in Europe is EN13261, and the axletree material has two kinds: EA1T and EA4T.EA4T is used for more than the speed per hour 200km, and its composition is 25CrMo; In addition, Alston provides the technical qualification of the French axletree supply of material, and the axletree material composition is 30NiCrMoV12.This two file has all provided Chemical Composition and mechanical property requirement, does not all provide the crucial thermal treatment process technology of making axletree.
Summary of the invention
The object of the invention provides a kind of heat treating method for 25 CrMo alloy steel hollow car axle for high-speed railway passenger trains.
The invention is characterized in, contain following steps successively:
Step (1). pre-treatment, temperature is: 900 ℃～930 ℃, insulation 3h～5h (h be hour), air cooling again;
Step (2). quench, temperature is: 880 ℃～930 ℃, insulation 3h～5h, shrend or salt shrend;
Step (3). tempering, temperature is: 630 ℃～680 ℃, insulation 3h～7h, air cooling;
Shaft blank its mechanical property after above-mentioned processing all satisfies among the general technological standard EN13261 in Europe the requirement of EA4T steel axletree, and particularly smooth sample fatigue strength and notched specimen fatigue strength all are higher than standard value.
Description of drawings
One of nearly outside surface tissue of Fig. 1 axletree
Two of the nearly outside surface tissue of Fig. 2 axletree
The breach geometric format synoptic diagram of Fig. 3 notch fatigue test
Fig. 4 schema of the present invention
Embodiment
Adopt composition and cleanliness factor all to meet the 25CrMo steel of EA4T in the EN13261 standard.The EA4T composition sees Table 1.
Table 1 EA4T composition of steel (wt%)
| Element | ??C | ??Si | ??Mn | ??P | ??S | ??Cr | ??Cu | ??Mo | ??V |
| ??25CrMo | ??0.22??0.29 | ??0.15??0.40 | ??0.50??0.80 | ??≤??0.020 | ??≤??0.015 | ??0.90??1.20 | ??0.30 | ??0.15??0.30 | ??0.06 |
The concrete thermal treatment process of implementing of 25CrMo steel is as follows:
Embodiment 1
920 ℃, the insulation 4h after air cooling, again 900 ℃ the insulation 4h after shrend, 640 ℃ the insulation 6h after air cooling.
Embodiment 2:
910 ℃, the insulation 4h after air cooling, again 910 ℃ the insulation 5h after shrend, 650 ℃ the insulation 6h after air cooling.
Embodiment 3:
920 ℃, the insulation 3h after air cooling, again 920 ℃ the insulation 3h after shrend, 650 ℃ the insulation 6h after air cooling.
Embodiment 4:
920 ℃, the insulation 4h after air cooling, again 910 ℃ the insulation 4h after shrend, 640 ℃ the insulation 7h after air cooling.
Embodiment 5:
930 ℃, air cooling behind the insulation 3h, shrend behind the air cooling behind 930 ℃ of insulation 4h again, air cooling behind 680 ℃ of insulation 3h.
Embodiment 6:
900 ℃, the insulation 5h after air cooling, again 880 ℃ the insulation 4h after shrend, 630 ℃ the insulation 7h after air cooling.
Embodiment 7:
920 ℃, the insulation 4h after air cooling, again 890 ℃ the insulation 5h after the salt shrend, 630 ℃ the insulation 5h after air cooling.
Embodiment 9:
920 ℃, the insulation 4h after air cooling, again 910 ℃ the insulation 4h after the salt shrend, 650 ℃ the insulation 7h after air cooling.
The grain fineness number of used 25CrMo steel alloy hole-bored axle from end to end shaft blank after above-mentioned thermal treatment process is handled is the 8-9 level, and microtexture is seen Fig. 1 and Fig. 2; Its intensity, plasticity, toughness and fatigue property all reach the requirement of EN13261 standard to the EA4T steel.It is to be noted that especially smooth sample fatigue strength and notched specimen (breach is seen Fig. 3 how much) fatigue strength all is higher than standard value.
Claims (2)
1. the heat treating method of materials of 25 CrMo alloy steel hollow car axle for high-speed railway passenger trains is characterized in that containing successively following steps:
Step (1). pre-treatment, temperature is: 900 ℃～930 ℃, insulation 3h～5h (h be hour), air cooling;
Step (2). quench, temperature is: 880 ℃～930 ℃, insulation 3h～5h, shrend or salt shrend;
Step (3). tempering, temperature is: 630 ℃～680 ℃, insulation 3h～7h, air cooling.
2. the heat treating method of materials of 25 CrMo alloy steel hollow car axle for high-speed railway passenger trains according to claim 1 is characterized in that having adopted pretreatment technology; Can adopt any quenching technology of shrend or salt shrend according to factory condition.
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| CN201010188588XA CN101857914B (en) | 2010-05-24 | 2010-05-24 | Heat treatment method for materials of 25CrMo alloy steel hollow car axle for high-speed railway passenger trains |
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| CN201010188588XA CN101857914B (en) | 2010-05-24 | 2010-05-24 | Heat treatment method for materials of 25CrMo alloy steel hollow car axle for high-speed railway passenger trains |
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| CN101857914A true CN101857914A (en) | 2010-10-13 |
| CN101857914B CN101857914B (en) | 2012-02-08 |
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Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102108436A (en) * | 2010-12-13 | 2011-06-29 | 清华大学 | Heat treatment method for alloy steel hollow car axle material for high-speed railway cars |
| CN102732699A (en) * | 2012-07-16 | 2012-10-17 | 鑫光热处理工业(昆山)有限公司 | Heat treatment process for powder part |
| CN102876860A (en) * | 2012-10-11 | 2013-01-16 | 清华大学 | Heat treatment method of novel alloy steel hollow car axle material |
| CN103320600A (en) * | 2013-06-17 | 2013-09-25 | 株洲九方热表技术有限公司 | Large-power locomotive axle and heat treatment method thereof |
| CN104233112A (en) * | 2014-10-11 | 2014-12-24 | 马钢(集团)控股有限公司 | Heat-treating process of high-speed train axle containing niobium and titanium |
| CN104513893A (en) * | 2013-09-26 | 2015-04-15 | 长春轨道客车装备有限责任公司 | Heat treatment method of EA4T steel axle |
| CN105063328A (en) * | 2015-09-06 | 2015-11-18 | 长春轨道客车装备有限责任公司 | DZ1 axle heat treatment technique |
| CN105838988A (en) * | 2016-06-07 | 2016-08-10 | 马鞍山钢铁股份有限公司 | Niobium-containing steel for axles of motor train unit and heat treatment process of niobium-containing steel |
| CN105886904A (en) * | 2016-06-07 | 2016-08-24 | 马鞍山钢铁股份有限公司 | Vanadium-containing steel for motor train unit axle and production method and heat treatment process thereof |
| CN105886940A (en) * | 2016-06-07 | 2016-08-24 | 马鞍山钢铁股份有限公司 | Vanadium-containing steel for motor train unit axle and heat treatment process thereof |
| CN109971923A (en) * | 2019-04-24 | 2019-07-05 | 上海交通大学 | A kind of determination method of steel alloy water quenching technology |
| CN113005363A (en) * | 2021-01-29 | 2021-06-22 | 洛阳中重铸锻有限责任公司 | Low-alloy heat-resistant steel with yield strength of more than 700MPa at 600 ℃ test temperature and heat treatment method |
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| CN1810997A (en) * | 2005-08-30 | 2006-08-02 | Bpw(梅州）车轴有限公司 | Heat treatment process for raising comprehensive performace of low alloy structure steel |
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2010
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| CN1810997A (en) * | 2005-08-30 | 2006-08-02 | Bpw(梅州）车轴有限公司 | Heat treatment process for raising comprehensive performace of low alloy structure steel |
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Cited By (19)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102108436A (en) * | 2010-12-13 | 2011-06-29 | 清华大学 | Heat treatment method for alloy steel hollow car axle material for high-speed railway cars |
| CN102108436B (en) * | 2010-12-13 | 2013-03-27 | 清华大学 | Heat treatment method for alloy steel hollow car axle material for high-speed railway cars |
| CN102732699A (en) * | 2012-07-16 | 2012-10-17 | 鑫光热处理工业(昆山)有限公司 | Heat treatment process for powder part |
| CN102876860A (en) * | 2012-10-11 | 2013-01-16 | 清华大学 | Heat treatment method of novel alloy steel hollow car axle material |
| CN102876860B (en) * | 2012-10-11 | 2014-09-24 | 清华大学 | Heat treatment method of novel alloy steel hollow car axle material |
| CN103320600A (en) * | 2013-06-17 | 2013-09-25 | 株洲九方热表技术有限公司 | Large-power locomotive axle and heat treatment method thereof |
| CN103320600B (en) * | 2013-06-17 | 2014-12-24 | 株洲九方热表技术有限公司 | Large-power locomotive axle and heat treatment method thereof |
| CN104513893A (en) * | 2013-09-26 | 2015-04-15 | 长春轨道客车装备有限责任公司 | Heat treatment method of EA4T steel axle |
| CN104233112A (en) * | 2014-10-11 | 2014-12-24 | 马钢(集团)控股有限公司 | Heat-treating process of high-speed train axle containing niobium and titanium |
| CN105063328A (en) * | 2015-09-06 | 2015-11-18 | 长春轨道客车装备有限责任公司 | DZ1 axle heat treatment technique |
| CN105838988A (en) * | 2016-06-07 | 2016-08-10 | 马鞍山钢铁股份有限公司 | Niobium-containing steel for axles of motor train unit and heat treatment process of niobium-containing steel |
| CN105886904A (en) * | 2016-06-07 | 2016-08-24 | 马鞍山钢铁股份有限公司 | Vanadium-containing steel for motor train unit axle and production method and heat treatment process thereof |
| CN105886940A (en) * | 2016-06-07 | 2016-08-24 | 马鞍山钢铁股份有限公司 | Vanadium-containing steel for motor train unit axle and heat treatment process thereof |
| CN105886904B (en) * | 2016-06-07 | 2018-02-16 | 马鞍山钢铁股份有限公司 | A kind of steel of axle of motor train unit containing vanadium, its production method and Technology for Heating Processing |
| CN105886940B (en) * | 2016-06-07 | 2018-04-24 | 马鞍山钢铁股份有限公司 | A kind of steel of axle of motor train unit containing vanadium and its heat treatment process |
| CN105838988B (en) * | 2016-06-07 | 2018-05-18 | 马鞍山钢铁股份有限公司 | The steel of axle of motor train unit containing niobium and its heat treatment process |
| CN109971923A (en) * | 2019-04-24 | 2019-07-05 | 上海交通大学 | A kind of determination method of steel alloy water quenching technology |
| CN109971923B (en) * | 2019-04-24 | 2019-11-05 | 上海交通大学 | A kind of determination method of steel alloy water quenching technology |
| CN113005363A (en) * | 2021-01-29 | 2021-06-22 | 洛阳中重铸锻有限责任公司 | Low-alloy heat-resistant steel with yield strength of more than 700MPa at 600 ℃ test temperature and heat treatment method |
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