CN103014253B - Thermal treatment method of 60Si2Mn steel subjected to friction welding - Google Patents
Thermal treatment method of 60Si2Mn steel subjected to friction welding Download PDFInfo
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- CN103014253B CN103014253B CN201210505369.9A CN201210505369A CN103014253B CN 103014253 B CN103014253 B CN 103014253B CN 201210505369 A CN201210505369 A CN 201210505369A CN 103014253 B CN103014253 B CN 103014253B
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Abstract
The invention discloses a thermal treatment method of 60Si2Mn steel subjected to friction welding, which comprises the steps of: heating the 60Si2Mn steel subjected to friction welding to 880-890 DEG C with a furnace, preserving the temperature for 30-40min, then discharging, and air-cooling to a room temperature; then heating to 820-830 DEG C, preserving the temperature for 40-50min, and then quenching in oil; and cooling to a room temperature, and then heating to 500-520 DEG C for tempering. According to the invention, by adopting an improved normalizing, quenching and tempering thermal treatment process, the comprehensive mechanical properties of the 60Si2Mn steel subjected to friction welding can be well improved. Compared with the existing normalizing, quenching and tempering thermal treatment process, the thermal treatment method has the advantage that the tensile strength and yield strength of a sample obtained by adopting the thermal treatment process disclosed by the invention can be remarkably improved.
Description
Technical field
The present invention relates to the heat treating method of steel, particularly relate to the heat treating method after 60Si2Mn steel friction welding (FW).
Background technology
The silicon Mn series alloy spring material that the application of 60Si2Mn Gang Shi China is comparatively general, there is high yield strength, high yield tensile ratio, cold deformation plasticity is low, machinability is good etc., is widely used in manufacturing the important spring of whisker, laminated spring and other heavily stressed lower work on automobile, tractor and rail vehicle.Friction welding (FW) is a kind of advanced welding technique, has that efficient, environmental protection, welding quality are high, low cost and other advantages, is widely used in machine industry.Adopting friction welding (FW) welding to replace the punching press of former blank afterbody endoporus can solve in punching and pull out the short and buckling phenomenon of the tail existing in process, yield rate is high, but can exist because welding streamline and inclusion metallic distribute and cause near the poor problem of comprehensive mechanical property seam face along seam face.In order to improve 60Si2Mn steel friction welding (FW) postwelding comprehensive mechanical property, need to carry out certain thermal treatment, to guarantee that welding joint mechanical property meets technical target of the product requirement.As everyone knows, same steel grade, identical chemical composition adopt different thermal treatment process, and its mechanical property is substantially different.Best thermal treatment process can be given full play to the potential material effect of material, thereby improves the quality of engineering goods.At present, domestic less to the thermal treatment process research after 60Si2Mn steel friction welding (FW), as adopt common Quenching plus tempering process, and normalizing+Quenching plus tempering process (normalizing: 900 ℃ × 60min, air cooling+quenching: 900 ℃ × 60min, oil cooling+tempering: 540 ℃ × 100min), but exist tensile strength low through the product of existing thermal treatment process processing, the defect that work-ing life is short.Therefore, need to explore new thermal treatment process.
Summary of the invention
The object of the invention is to for the above-mentioned defect existing in prior art, the heat treating method after a kind of 60Si2Mn steel friction welding (FW) is provided, after raising friction welding, the comprehensive mechanical property of 60Si2Mn steel, increases the service life.
To achieve these goals, the invention provides the heat treating method after a kind of 60Si2Mn steel friction welding (FW), comprise the following steps:
60Si2Mn steel after friction welding (FW) is heated to 880-890 ℃ with stove, after insulation 30-40min, comes out of the stove air cooling to room temperature;
Then be heated to 820-830 ℃, after insulation 40-50min, in oil, carry out quench treatment;
Be cooled to and reheat 500-520 ℃ after room temperature and carry out temper.
Preferably with the heating rate of 5-10 ℃/min, the 60Si2Mn steel after friction welding (FW) is heated to 880-890 ℃ with stove.
The time of temper is preferably 110-120min.
The present invention adopts improved normalizing+Quenching plus tempering process, can improve better the comprehensive mechanical property after 60Si2Mn steel friction welding (FW).Compared with existing normalizing+Quenching plus tempering process, adopt tensile strength and the yield strength of the sample obtaining of above-mentioned thermal treatment process to be significantly improved.
Embodiment
Set forth content of the present invention below by specific embodiment.It will be understood by those skilled in the art that following illustrate for example only for explaining the present invention but not for it being made to any restriction.
Embodiment 1
60Si2Mn steel after friction welding (FW) is heated to 880 ℃ with stove with the heating rate of 5 ℃/min, after insulation 30min, comes out of the stove air cooling to room temperature; Then be heated to 820 ℃, after insulation 40min, in oil, carry out quench treatment; Be cooled to and reheat 500 ℃ after room temperature and carry out temper, the time of temper is 110min.
Embodiment 2
60Si2Mn steel after friction welding (FW) is heated to 890 ℃ with stove with the heating rate of 10 ℃/min, after insulation 40min, comes out of the stove air cooling to room temperature; Then be heated to 830 ℃, after insulation 50min, in oil, carry out quench treatment; Be cooled to and reheat 520 ℃ after room temperature and carry out temper, the time of temper is 120min.
Embodiment 3
60Si2Mn steel after friction welding (FW) is heated to 885 ℃ with stove with the heating rate of 7 ℃/min, after insulation 35min, comes out of the stove air cooling to room temperature; Then be heated to 825 ℃, after insulation 45min, in oil, carry out quench treatment; Be cooled to and reheat 515 ℃ after room temperature and carry out temper, the time of temper is 115min.
Embodiment 4
60Si2Mn steel after friction welding (FW) is heated to 880 ℃ with stove with the heating rate of 8 ℃/min, after insulation 30min, comes out of the stove air cooling to room temperature; Then be heated to 820 ℃, after insulation 45min, in oil, carry out quench treatment; Be cooled to and reheat 510 ℃ after room temperature and carry out temper, the time of temper is 120min.
Comparative example
60Si2Mn steel after friction welding (FW) is heated to 900 ℃ with stove with the heating rate of 8 ℃/min, after insulation 35min, comes out of the stove air cooling to room temperature; Then be heated to 900 ℃, after insulation 45min, in oil, carry out quench treatment; Be cooled to and reheat 540 ℃ after room temperature and carry out temper, the time of temper is 100min.
Table 1 adopts different heat treatment technique to obtain the test result of the physicals of sample after having provided 60Si2Mn friction welding (FW).Compared with comparative example, the sample that adopts thermal treatment process of the present invention to obtain has better mechanical property.Wherein, tensile strength has improved more than 18% more than bringing up to 1300Mpa from 1090MPa.Bending strength, yield strength, unit elongation and hardness all have raising in various degree, and indices is all better than comparative sample.
After table 160Si2Mn friction welding (FW), adopt the physicals after different heat treatment art breading
| ? | Embodiment 1 | Embodiment 2 | Embodiment 3 | Embodiment 4 | Comparative example |
| Tensile strength (MPa) | 1305 | 1324 | 1355 | 1341 | 1090 |
| Bending strength (MPa) | 489 | 493 | 491 | 495 | 477 |
| Yield strength (MPa) | 1255 | 1273 | 1211 | 1296 | 1067 |
| Unit elongation (%) | 13 | 15 | 14 | 13 | 12 |
| Hardness (HRC) | 60 | 62 | 61 | 61 | 58 |
Test and test show, after the 60Si2Mn steel after adopting thermal treatment process of the present invention to friction welding (FW) is heat-treated, the comprehensive mechanical property of product is significantly improved, and has improved the fatigue property of product, contributes to extend the work-ing life of sample.
Claims (3)
1. the heat treating method after 60Si2Mn steel friction welding (FW), comprises the following steps:
60Si2Mn steel after friction welding (FW) is heated to 880-890 ℃ with stove, after insulation 30-40min, comes out of the stove air cooling to room temperature;
Then be heated to 820-830 ℃, after insulation 40-50min, in oil, carry out quench treatment;
Be cooled to and reheat 500-520 ℃ after room temperature and carry out temper.
2. heat treating method according to claim 1, is characterized in that, with the heating rate of 5-10 ℃/min, the 60Si2Mn steel after friction welding (FW) is heated to 880-890 ℃ with stove.
3. heat treating method according to claim 1, is characterized in that, the time of temper is 110-120min.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210505369.9A CN103014253B (en) | 2012-11-29 | 2012-11-29 | Thermal treatment method of 60Si2Mn steel subjected to friction welding |
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| CN201210505369.9A CN103014253B (en) | 2012-11-29 | 2012-11-29 | Thermal treatment method of 60Si2Mn steel subjected to friction welding |
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| CN103014253A CN103014253A (en) | 2013-04-03 |
| CN103014253B true CN103014253B (en) | 2014-06-18 |
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| CN103498035A (en) * | 2013-09-26 | 2014-01-08 | 无锡阳工机械制造有限公司 | Thermal treatment method of stainless steel |
| CN104313282B (en) * | 2014-09-01 | 2016-05-04 | 富阳通力机械制造有限公司 | A kind of pull bar heat treatment method |
| CN106350654A (en) * | 2015-07-17 | 2017-01-25 | 四川迪瑞机电设备有限公司 | Treatment method capable of enabling harness of steel welding joints to be uniform |
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| CN101671792B (en) * | 2008-09-12 | 2011-01-19 | 攀钢集团研究院有限公司 | Spring steel and preparation method thereof |
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