Microstructure and Properties of 316 Stainless Steel Produced by Laser-Induced Arc Hybrid Additive Manufacturing

被引：0

作者：

Li X. ^{[1
]}

Song G. ^{[1
]}

Zhang Z. ^{[1
]}

Liu L. ^{[1
]}

机构：

[1] Key Laboratory of Advanced Connection Technology of Liaoning Province, School of Materials Science and Engineering, Dalian University of Technology, Dalian, 116024, Liaoning

来源：

Zhongguo Jiguang/Chinese Journal of Lasers | 2019年 / 46卷 / 12期

关键词：

316 stainless steel; Additive manufacturing; Laser technique; Laser-arc hybrid; Mechanical properties; Microstructure;

D O I：

10.3788/CJL201946.1202006

中图分类号：

学科分类号：

摘要：

A low-power laser is used to induce a TIG arc for improving the surface quality and mechanical properties of the stainless steel components produced via TIG arc additive manufacturing; the arcs before and after laser radiation are compared. Further, the tensile strength and microstructure of the components are investigated at different laser powers. The results denote that the laser induced effect can compress the arc and stabilize the deposition process, resulting in high-speed deposition. The proposed methodology results in low heat input and improves the mechanical properties of the wall. A columnar dendrite microstructure of the wall is considered. The distance between the dendrites from the bottom to the top gradually increases, whereas the hardness decreases. The top of the wall exhibits an equiaxed dendrite microstructure. The 316 stainless steel produced by laser-induced arc additive manufacturing comprises austenite and ferrite. © 2019, Chinese Lasers Press. All right reserved.

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