Effect of Quenching Process on Microstructure of a HSLA Steel

被引：0

作者：

Yang T. ^{[1
]}

Su H. ^{[1
]}

Luo X. ^{[1
]}

Chai F. ^{[1
]}

Zhang Z. ^{[1
]}

机构：

[1] Department of Structural Steels, Central Iron and Steel Research Institute, Beijing

来源：

Cailiao Yanjiu Xuebao/Chinese Journal of Materials Research | 2017年 / 31卷 / 09期

关键词：

HSLA steel; Metallic materials; Microstructure; Quenching cooling rate;

D O I：

10.11901/1005.3093.2016.648

中图分类号：

学科分类号：

摘要：

The effect of quenching cooling rates on microstructure of a high-strength low-alloy (HSLA) steel plate of 35 mm in thickness was investigated by the finite element software ABAQUS, Formastor thermal dilatometer, metalloscope, TEM and EBSD. The results show that the quenching cooling rate has significant effect on the microstructure and mechanical properties within the near surface band from the surface to the depth 8 mm of the steel plate. With the increase of quenching cooling rate, the amount of lath-like microstructure, the density of dislocation and low misorientation angle boundary have significant increased, and the width of lathes is markedly refined, leading to the obviously increase of the hardness of the band near the surface. With the increase of quenching cooling rate, there were no significant difference on the hardness, the size of lathes, grain boundary characters and MA constituent of the band from the quarter depth to the center of the steel plates. The ABAQUS simulation result is in accordance with the distribution of the hardness and microstructure of steel plates. The distribution of the cooling rate on the cross-section of steel plates determine the microstructure transition types and features. © All right reserved.

引用

页码：650 / 658

页数：8

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