Fabrication and Characterization of AISI 420 Stainless Steel Using Selective Laser Melting

被引：93
|
作者：
Zhao, Xiao [1 ]
Wei, Qingsong [1 ]
Song, Bo [1 ]
Liu, Ying [1 ]
Luo, Xiwang [1 ]
Wen, Shifeng [1 ]
Shi, Yusheng [1 ]
机构：
[1] Huazhong Univ Sci & Technol, Sch Mat Sci & Technol, State Key Lab Mat Proc & Die & Mould Technol, Wuhan 430074, Peoples R China
来源：
MATERIALS AND MANUFACTURING PROCESSES | 2015年 / 30卷 / 11期
基金：
中国国家自然科学基金;
关键词：
Hardness; Laser; Melting; Microstructure; Optimization; Phase; SLM; Steel; TENSILE BEHAVIOR; HEAT-TREATMENT; POWDERS; MICROSTRUCTURE; TOOLS; SLM;
D O I：
10.1080/10426914.2015.1026351
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
Selective laser melting (SLM) offers great possibilities to fabricate metal tools with a complex geometry, but there are limitations regarding some materials. This work focuses on the fabrication of AISI 420 stainless steel using SLM for the application of plastic injection mold. The melt characteristic of the powders was firstly concluded, and then the microstructure, phase composition, and hardness were characterized using scanning electron microscopy, X-ray diffraction, and Rockwell hardness test, respectively. The results showed that cellular microstructure was observed along the direction of the maximum heat flow. The proportion of the phases varies with the change of SLM processing parameters, which directly affects on the hardness of the parts. The relative density over 99% was obtained and the highest hardness presents 50.7 HRC, which meets the requirement of plastic injection molding application.
引用
收藏
页码：1283 / 1289
页数：7
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