Hot Deformation and Corrosion Resistance of High-Strength Low-Alloy Steel

论文摘要

The hot deformation characteristics and the corrosion behavior of a high-strength low-alloy（HSLA） steel were investigated at deformation temperatures ranging from 800 to 1100 ℃ and strain rates ranging from 0.1 to 10 s-1 using an MMS-200 thermal simulation testing machine. Based on the flow curves from the experiment, the effects of temperature and strain rate on the dynamic recrystallization behavior were analyzed. The flow stress decreased with increasing deformation temperature and decreasing strain rate. With the assistance of the process parameters, constitutive equations were used to obtain the activation energy and hot working equation. The hot deformation activation energy of HSLA steel in this work was 351.87 kJ/mol. The work hardening rate was used to determine the critical stress（strain） or the peak stress（strain）. The dependence of these characteristic values on the Zener-Hollomon parameter was found. A dynamic recrystallization kinetics model of the tested HSLA steel was constructed, and the validity of the model was confirmed by the experimental results. Observation of the microstructures indicated that the grain size increased with increasing deformation temperature,which led to a lowered corrosion resistance of the specimens.

论文目录

文章来源

类型: 期刊论文

作者: Wilasinee Kingkam,Cheng-Zhi Zhao,Hong Li,He-Xin Zhang,Zhi-Ming Li

来源: Acta Metallurgica Sinica(English Letters) 2019年04期

年度: 2019

分类: 工程科技Ⅰ辑

专业: 金属学及金属工艺

单位: College of Materials Science and Chemical Engineering,Harbin Engineering University,Key Laboratory of Superlight Materials and Surface Technology,Ministry of Education,Harbin Engineering University,College of Power and Energy Engineering,Harbin Engineering University

基金: supported financially by the Fundamental Research Funds for the Central Universities (Nos. HEUCFP201719 and HEUCFP201731)

分类号: TG142.33;TG156

页码: 495-505

总页数: 11

文件大小: 1174K

下载量: 14

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