Effect of heat treatment on microstructure and mechanical properties of Ti-containing low alloy martensitic wear-resistant steel
作者机构：School of Materials Science and EngineeringShanghai UniversityShanghai 200444China
出 版 物：《China Foundry》 (中国铸造（英文版）)
年 卷 期：2023年第20卷第4期
页 面：329-338页
核心收录：
学科分类：08[工学] 080502[工学-材料学] 0805[工学-材料科学与工程（可授工学、理学学位）]
主 题：low alloy wear-resistant steel quenching temperature cooling condition precipitate retained austenite wear resistance
摘 要：Effects of quenching temperature and cooling conditions(water cooling and 10%NaCl cooling)on microstructure and mechanical properties of a 0.2%Ti low alloy martensitic wear-resistant steel used for die casting ejector plate were *** results show that lath martensite can be obtained after austenitizing in the range of 860-980℃and then water *** an increase in austenitizing temperature,the precipitate content gradually *** precipitates are mainly composed of TiC and Ti4C2S2,and their total content is between 1.15wt.%and 1.64wt.%.The precipitate phase concentration by water-cooling is higher than that by10%NaCl cooling due to the lower cooling rate of water *** the austeniting temperature increases,the hardness and tensile strength of both water cooled and 10%NaCl cooled steels firstly increase and then *** experimental steel exhibits the best comprehensive mechanical properties after being austenitized at 900℃,cooled by 10%NaCl,and then tempered at 200℃.Its hardness,ultimate tensile strength,and wear rate reach551.4 HBW,1,438.2 MPa,and 0.48×10^(-2)mg·m^(-1),respectively.
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