汽车前轴用贝氏体型非调质钢连续冷却转变

doi:10.13228/j.boyuan.issn0449-749x.20160170

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Abstract Microstructure evolution of bainite non-quenched and tempered steel for automobile front axle during continuous cooling transformation was studied by DIL805L thermal dilatometer. The influences of alloy elements and cooling rate on the continuous cooling transformation curves， microstructure and micro-hardness of the steel were analyzed. The results show that alloy elements， such as Mn， Si， Cr， V and B in FAS2225 steel， were favorable for getting bainite in a wider range of cooling rate， and the transformation zones of pearlite and bainite were separated in the CCT diagram. Bainite can be obtained above the cooling rate of 0.1 ℃/s. With the increasing of cooling rates， the Vickers hardness of experimental steel increased， but the increase amplitude has changed significantly at the cooling rate of 0.1 and 2 ℃/s.

Received: 28 April 2016 Published: 09 December 2016

PACS:

TG142.4

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AN Yi-Guo. Continuous cooling transformation of bainite non-quenched and tempered steel for automobile front axle[J]. Iron and Steel, 2016, 51(12): 70-73.

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http://www.chinamet.cn/Jweb_gt/EN/10.13228/j.boyuan.issn0449-749x.20160170 OR http://www.chinamet.cn/Jweb_gt/EN/Y2016/V51/I12/70

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