Study on Selective Laser Melting Process and Mechanical Property of CX Alloy Steel

Author of the article:LYU Guangming, LI Yufa, GUO Shaoshuai, WANG Chen, TANG Hongkui, LAI Yunjin, WANG Qingxiang, LIANG Sh

Author's Workplace：Sino-Euro Materials Technologies of Xi’an Co., Ltd., Xi’an 3D Printing Metal Powder Materials Engineering Technology Research Center, Xi’an 710018, China

Key Words：CX alloy steel; selective laser melting (SLM); microstructure; mechanical properties

Abstract：Effect of microstructure and mechanical properties of CX alloy steel made by Selective Laser Melting （SLM） with different laser powers and scanning speed was studied. The results showed that porosity and relative density of the CX alloy steel first decreased, and then increased with the increase of laser power. Mechanical properties of the CX alloy steel first increased, and then decreased with laser power increased; The best process window is that laser power at 300 W and scanning speed at 950 mm/s, respectively; the responding porosity, relative density, ultimate strength, yield strength and elongation was 0.012%, 99.84%, 1 135 MPa, 1 005 MPa and 19.3%, respectively .