Effects of selective laser melting processing parameters on the densification and mechanical properties of Fe20Cr5Al alloy
LU Yang1, ZHAO Zhe1, MIING Liang1, HU Zijian1, XUE Xiangyuan1, DENG Xin1, LIU Jianye2, QI Wenjun2, NIU Liuhui2, GAO Wenhua2
1. School of Electromechanical Engineering, Guangdong University of Technology, Guangzhou 510006, China; 2. Guangdong Hanbang 3D Technology Co., Ltd, Zhongshan 528427, China
Abstract Fe20Cr5Al alloy vehicle exhaust purifier material was fabricated by 3D printing based on selective laser melting (SLM) forming technology. The relationship between printer parameters (laser power, scanning speed and scanning spacing) and the density of printed parts were systematically studied by using response surface experimental design. The relationship model between SLM forming parameters and density and the relationship model between printer parameters and mechanical properties were obtained, and the optimum SLM forming parameters were obtained. The results show that the effects of SLM process parameters on the density of printed parts are in the order of laser power, scanning speed and scanning spacing. The optimum SLM forming parameters are laser power of 314.8 W, scanning speed of 1 700 mm/s and scanning distance of 0.06 mm. The predicted relative density under this process parameter is 99.74%, and the average error with the SLM forming experiment result is only 0.16%. The model has high reliability, and the average actual relative density under the optimized process parameter is 99.58%. the tensile strength is 616.44 MPa, and the elongation is 1.513%.
LU Yang,ZHAO Zhe,MIING Liang, et al. Effects of selective laser melting processing parameters on the densification and mechanical properties of Fe20Cr5Al alloy[J]. Materials Science and Engineering of Powder Metallurgy, 2019, 24(5): 422-429.
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2019, Vol. 24 
