Microstructure and mechanical properties of 20Si2CrNi3MoV steel treated by HDQP process

IF 3.1 2区 材料科学 Q1 METALLURGY & METALLURGICAL ENGINEERING
Chuan-feng Meng , Lei Zhang , Cun-yu Wang , Yu-jie Zhang , Ying-hui Wei , Yi-de Wang , Wen-quan Cao
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引用次数: 1

Abstract

A combined process of hot-deformation plus two-step quenching and partitioning (HDQP) treatment was applied to a low-carbon 20Si2CrNi3MoV steel, and transmission electron microscopy (TEM), scanning electron microscopy (SEM), X-ray diffraction (XRD), Vickers hardness and tension test were used to characterize the microstructure and mechanical properties. More stable retained austenite due to fine microstructures and typical curved micromorphology is obtained, and the newly-treated steel obtains more retained austenite because of the effect of hot deformation. The retained austenite fraction increases and then decreases with the increasing quenching temperature from 200 to 350 °C. The maximum retained austenite fraction (18. 3%) and elongation (15%) are obtained to enhance the ductility.

HDQP工艺处理20Si2CrNi3MoV钢的组织与力学性能
对20Si2CrNi3MoV低碳钢进行了热变形+两步淬火配分(HDQP)处理,并采用透射电镜(TEM)、扫描电镜(SEM)、x射线衍射(XRD)、维氏硬度和拉伸试验对其组织和力学性能进行了表征。由于细小的组织和典型的弯曲微观形貌,获得了更稳定的残余奥氏体,而新处理钢由于热变形的影响,获得了更多的残余奥氏体。在200 ~ 350℃范围内,随着淬火温度的升高,残余奥氏体分数先升高后降低。最大残余奥氏体分数(18。(3%)和延伸率(15%),以提高延展性。
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来源期刊
CiteScore
4.30
自引率
0.00%
发文量
2879
审稿时长
3.0 months
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