Induction quenching process of the third generation hub-bearing flange inner ringChinese Full Text
Xu Peiyi;Gu Jianfeng;School of Material Science and Engineering,Shanghai Jiaotong University;SKF ( Shanghai) Automotive Technologies Co.,Ltd.;
Abstract: Effects of induction quenching parameters on hardening depth and microstructure of the third generation hub-bearing flange inner ring were investigated. The results show that macroscopic profile expands obviously and the depth of hardening zone increases with increasing of input energy during induction quenching. The normal microstructure in surface and sub-surface layer consists of fine needle martensite and lath martensite,while the too high input energy results in the surface over-heating and formation of thick needle martensite,even overburning. The normal microstructure in transition zone consists of fine needle martensite,a small amount of ferrite and troostite,but too low input energy causes the presence of a large amount of troostite and the increasing fraction of retained ferrite. The optimum induction quenching process parameters are recommended,including the quenching power of 180 k W and heating time of 5. 4 s.
- DOI：
10.13251/j.issn.0254-6051.2015.10.016
- Series：
- Subject：
- Classification Code：
TG156.3
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