Microstructural evolution and mechanical properties of a low alloy high strength Ni-Cr-Mo-V steel during heat treatment process

International Conference on Computer Information and Automation Engineering

计算机科学;运输工程

Wu, C.^1 ; Han, S.^2

Natl.-Loc. Jt. Engineering Laboratory of Intelligent Manufacturing Oriented Automobile Die and Mould, School of Mechanical Engineering, Tianjin University of Technology and Education, NO.1310 Dagu South Road, Tianjin

300222, China^1

School of Mechanical Engineering, Yanshan University, Qinhuangdao

066004, China^2

关键词: Heat treatment process;    High strength;    Increasing temperatures;    Lath structures;    Morphological evolution;    Reduction in area;    Tempering temperature;    Ultimate tensile strength;   

Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/359/1/012027/pdf
DOI  :  10.1088/1757-899X/359/1/012027

学科分类：计算机科学（综合）

来源: IOP

【 摘 要 】

In order to obtain an optimal heat treatment for a low alloy high strength Ni-Cr-Mo-V steel, the microstructural evolution and mechanical properties of the material were studied. For this purpose, a series of quenching and temper experiments were carried out. The results showed that the effects of tempering temperature, time, original microstructure on the microstructural evolution and final properties were significant. The martensite can be completely transformed into the tempered lath structure. The width and length of the lath became wider and shorter, respectively with increasing temperature and time. The amount and size of the precipitates increased with temperature and time. The yield strength (YS), ultimate tensile strength (UTS) and hardness decreased with temperature and time, but the reduction in area (Z), elongation (E) and impact toughness displayed an opposite trend, which was related to the morphological evolution of the lath tempered structure.