4%锰钢马氏体回火的膨胀测定与微观结构研究

Dilatometric and Microstructural Study of Martensite Tempering in 4% Mn Steel.

作者信息

Grajcar Adam, Morawiec Mateusz, Jimenez Jose Antonio, Garcia-Mateo Carlos

机构信息

Department of Engineering Materials and Biomaterials, Silesian University of Technology, 44-100 Gliwice, Poland.

Department of Physical Metallurgy, National Center for Metallurgical Research, 28040 Madrid, Spain.

出版信息

Materials (Basel). 2020 Oct 7;13(19):4442. doi: 10.3390/ma13194442.

DOI:10.3390/ma13194442

PMID:33036358

原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC7579211/

Abstract

This paper presents the results of martensite tempering resistance in 4% Mn steel. The material was quenched and tempered at 350 °C for 15, 30, and 60 min. The analysis of the quenching and tempering was carried out using dilatometric and microstructural approaches. The phase composition was assessed using X-ray diffraction. The M temperature and tempering progress were simulated using JMatPro software. The dilatometric analysis revealed a small decrease in the relative change in length (RCL) during tempering. This decrease was connected to the precipitation kinetics of cementite within the martensite laths. The microstructure investigation using a scanning electron microscope showed a very small amount of carbides, even for the longest tempering time. This showed the high tempering resistance of the martensite in medium-Mn steels. The hardness results showed an insignificant decrease in the hardness depending on the tempering time, which confirmed the high tempering resistance of martensite.

摘要

本文介绍了4%锰钢的马氏体回火抗力结果。该材料在350°C下淬火并回火15、30和60分钟。采用膨胀法和微观结构方法对淬火和回火进行了分析。使用X射线衍射评估相组成。使用JMatPro软件模拟了Ms温度和回火过程。膨胀分析表明，回火过程中长度相对变化（RCL）略有下降。这种下降与马氏体板条内渗碳体的析出动力学有关。使用扫描电子显微镜进行的微观结构研究表明，即使回火时间最长，碳化物的数量也非常少。这表明中锰钢中马氏体具有高回火抗力。硬度结果表明，硬度随回火时间的降低不明显，这证实了马氏体具有高回火抗力。