激光与光电子学进展, 2016, 53 (11): 111404, 网络出版: 2016-11-14   

激光选区熔化成形S-04钢的组织及性能

Microstructure and Mechanical Property of S-04 Steel by Selective Laser Melting
作者单位
1 华中科技大学武汉光电国家实验室, 湖北 武汉 430074
2 华中科技大学光学与电子信息学院, 湖北 武汉 430074
摘要
采用激光选区熔化技术成形S-04钢试样,研究了热处理前后成形试样的显微组织及力学性能。结果表明,成形试样的致密度最高可达99.791%,热处理前后试样均由α′马氏体和少量γ残余奥氏体构成;热处理前试样具有激光选区熔化技术特有的多层堆积特征,热处理后该特征消失且试样物相主要为束状马氏体; 热处理后试样的室温力学性能优于热处理前试样。
Abstract
Selective laser melting (SLM) technology is used to fabricate S-04 specimens, and their microstructures and mechanical properties before and after heat-treatment are researched. The results show that the density of S-04 molded sample can be up to 99.791% and the specimens before and after heat-treatment are both composed of α′ martensite and a little residual γ austenite. The untreated specimen possess a multi-layer stacked character peculiar to the SLM technique, whereas after heat-treatment, this character disappears and the main specimen phase is bunchy martensite. The mechanical property at room temperature of heat-treated specimens is better than that of non-heat-treated ones.

靖冠乙, 魏恺文, 王泽敏, 殷杰, 曾晓雁. 激光选区熔化成形S-04钢的组织及性能[J]. 激光与光电子学进展, 2016, 53(11): 111404. Jing Guanyi, Wei Kaiwen, Wang Zemin, Yin Jie, Zeng Xiaoyan. Microstructure and Mechanical Property of S-04 Steel by Selective Laser Melting[J]. Laser & Optoelectronics Progress, 2016, 53(11): 111404.

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