Selective laser melting of 24CrNiMo steel for brake disc: Fabrication efficiency, microstructure evolution, and properties

被引：65
|
作者：
Wei, Mingwei [1 ]
Chen, Suiyuan [1 ]
Xi, Lianyun [1 ]
Liang, Jing [1 ]
Liu, Changsheng [1 ]
机构：
[1] Northeastern Univ, Sch Mat & Engn, Key Lab Laser Applicat Technol & Equipment Liaoni, Key Lab Anisotropy & Texture Mat,Minist Educ, Shenyang 110819, Liaoning, Peoples R China
来源：
OPTICS AND LASER TECHNOLOGY | 2018年 / 107卷
基金：
国家重点研发计划;
关键词：
Selective laser melting; 24CrNiMo steel; Brake disc; High power input; Microstructure and properties; MECHANICAL-PROPERTIES; PROCESS PARAMETERS; OPTIMIZATION; SLM; TEMPERATURE; BEHAVIOR; ALLOY; LAYER; PARTS;
D O I：
10.1016/j.optlastec.2018.05.033
中图分类号：
O43 [光学];
学科分类号：
070207 ; 0803 ;
摘要：
24CrNiMo alloy steel used for brake disc was prepared by selective laser melting technology with the processing parameters of high power input and thicker powder layer. The Microstructure and mechanical properties of as-fabricated part were characterized. Effects of processing parameters on the production efficiency, thermal history and microstructure evolution mechanism were studied. The results of this work indicate that the as-fabricated steel microstructure mainly consist of granular bainite and meta bainite, which results in a high microhardness and fine strength. High laser power input leads to a high thermal accumulation level in a SLM process and the microstructure mainly transforms into bainite. In addition, compared to the commonly used parameters, the overall preparation efficiency in this study is enhanced by 82.9%. These presented results provide an insight on how to improve SLM efficiency, and preparation of high-performance 24CrNiMo alloy steel by SLM technology shows high potential for manufacturing of the brake disc core part. (C) 2018 Elsevier Ltd. All rights reserved.
引用
收藏
页码：99 / 109
页数：11
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