Effect of Rare Earth Addition on Microstructure, Mechanical Property and Nitriding Performance of a Medium Carbon Steel

被引：0

作者：

Gui W. ^{[1
]}

Liu Y. ^{[1
]}

Zhang X. ^{[1
]}

He L. ^{[1
]}

Wang Y. ^{[1
]}

He E. ^{[1
]}

Wang M. ^{[1
]}

机构：

[1] Shaanxi Fast Gear Co. Ltd., Xi'an

来源：

Cailiao Yanjiu Xuebao/Chinese Journal of Materials Research | 2021年 / 35卷 / 01期

关键词：

Mechanical property; Metallic materials; Microalloying; Microstructure; Rare earth;

D O I：

10.11901/1005.3093.2020.203

中图分类号：

学科分类号：

摘要：

Effect of rare earth microalloying on the microstructure and mechanical property of a medium carbon steel have been investigated, focusing on the influence of rare earth on the formed surface layer after nitriding heat treatment. The results indicate that by adding rare earth elements into the test steel: the original inclusions of long strips of MnS and the coarse Al2O3 convert into the small spherical inclusions of complex rare earth sulfur oxide; the ferrite volume content is reduced,while more finer lamellar pearlites are formed; the impact energy increases by 126% and the plasticity increases by 10%. After nitriding heat treatment, it is found that the addition of rare earth elements can significantly improve the surface hardness and nitride case depth, as well as improving the vein-like structure of the nitriding layer. © 2021, Editorial Office of Chinese Journal of Materials Research. All right reserved.

引用

页码：72 / 80

页数：8

共 50 条

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