Formation of ultrafine pearlites in tempered 42CrMo steel induced by electro-pulsing

被引：15
|
作者：
Pan, Dong [1 ,2 ]
Zhao, Yuguang [1 ,2 ]
Wang, Yitong [1 ,2 ]
Xu, Xiaofeng [1 ,2 ]
Yin, Penglu [1 ,2 ]
Chong, Xueying [1 ,2 ]
机构：
[1] Jilin Univ, Key Lab Automobile Mat, Minist Educ, 5988 Renmin St, Changchun 130025, Peoples R China
[2] Jilin Univ, Dept Mat Sci & Engn, 5988 Renmin St, Changchun 130025, Peoples R China
来源：
MATERIALS LETTERS | 2019年 / 251卷
基金：
中国国家自然科学基金;
关键词：
Lamellar pearlites; Microstructure; 42CrMo steel; Electro-pulsing; Thermal analysis; GRAIN-BOUNDARIES; MICROSTRUCTURE; TEMPERATURE; BEHAVIOR;
D O I：
10.1016/j.matlet.2019.05.049
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
In this contribution, a totally different tempered microstructural sequence induced by electro-pulsing is observed in 42CrMo steel. Compared with the granular carbides in tempered TQ (traditional quenched) sample, ultrafine lamellar pearlites are found in tempered EPQ (electro-pulsing treated, followed with water-cooling) sample. The formation of this special tempered microstructure is related with the stacking faults in EPQ sample. Moreover, the grains and microstructure of 42CrMo steel are also refined via electro-pulsing. Results of mechanical properties indicate that tempered 42CrMo steel with ultrafine lamellar pearlites possesses higher strength, ductility and hardness. This interesting finding paves the way for developing 42CrMo steel with higher properties more efficiently. (C) 2019 Elsevier B.V. All rights reserved.
引用
收藏
页码：73 / 77
页数：5
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