Characterisation of heat-treated gradient alloy steel fabricated by laser melting deposition

被引：5
作者：
Liang, X. D. [1 ]
Zhang, S. [1 ]
Wang, Z. Y. [2 ]
Zhang, C. H. [1 ]
Zhang, D. X. [3 ]
Wu, C. L. [1 ]
机构：
[1] Shenyang Univ Technol, Sch Mat Sci & Engn, Shenyang 110870, Liaoning, Peoples R China
[2] Wuzhou Univ, Wuzhou, Peoples R China
[3] Shenyang Dalu Laser Technol CO LTD, Shenyang, Peoples R China
来源：
MATERIALS SCIENCE AND TECHNOLOGY | 2023年 / 39卷 / 05期
关键词：
Laser melting deposition; heat treatment; gradient alloy steel; electrochemical corrosion; MECHANICAL-PROPERTIES; STAINLESS-STEEL; CORROSION BEHAVIOR; MICROSTRUCTURE EVOLUTION; WEAR-RESISTANCE; TEMPERATURE; COMPOSITE; TOUGHNESS; STRENGTH; FRACTION;
D O I：
10.1080/02670836.2022.2127984
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
A gradient alloy steel prepared by laser melting deposition (LMD) was subjected to two heat treatments (quenching-intercritical quenching denoted as Q-IQ and quenching-intercritical quenching-tempering denoted as Q-IQ-T). Results showed that martensite microstructure was changed to a duplex microstructure of martensite and ferrite after heat treatment, with a small number of Cr23C6 phases appearing. The samples before and after heat treatment exhibited random crystallographic orientation, while the grain was refined and the fraction of Cr23C6 increased after heat treatment. The samples after heat treatment possessed more slip systems and exhibited a decrease in hardness and wear resistance in comparison with LMDed sample. The corrosion resistance decreased in the order of Q-IQ > Q-IQ-T > LMDed samples in 3.5 wt-% NaCl solution.
引用
收藏
页码：567 / 581
页数：15
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