Research on Process and Property of H13 Die Steel Directly Manufactured by Selective Laser Melting

Abstract:

The process of selective laser melting direct manufacturing based on H13 Die Steel is studied to explore the optimized process of H13 mold products. Laser linear energy and two critical process parameters including laser power and scanning space are carried out process validation and analysis, test the mechanical performance of samples manufactured, analyze the surface morphology and microstructure of the representative samples. The result shows that with the laser power of 180W, scanning speed of 450 mm/s, laser linear energy of 0.40 J/mm, the sample manufactured directly by selective laser melting with 57 HRC surface hardness which is higher than the coasting standard. The internal structure of the sample is homogeneous, and the defects such as pore and spherify are less.

• Periodical: Advanced Materials Research (Volume 1142)
• Pages: 254-259
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.1142.254
• Online since: January 2017
• Authors: Shuai Chen, Feng He Tao, Jian Chun Yang, Chang Zhi Jia*
• Keywords: H13, Microstructure, Selective Laser Melting, Surface Hardness

References

[1] L. Jie, Y.Q. YangG, X.B. Su, et al. Efficiency optimization of selective laser melting for multi-parts, J. Optics and Precision Engineering. 4 (2012) 699-705.

[2] J.F. Huang, Y.L. Cai, Y.P. Yu, et al. Microstructure and hardness of spray formed H13 steel, J. Journal of University of Science and Technology Beijing. 1 (2011) 28-32.

[3] H.L. Wang, B. Liu, H.P. Liu, et al. Microstructure and Mechanical Behavior of Nickel Based Alloy Powder GH4169Fabricated by Selective Laser Melting, J. Hot Working Technology. 10 (2015) 90-92.

[4] Z. Xie. Research on Processing and Mechanism of AZ91D Magnesium Alloy by Selective Laser Melting [D]. Wuhan: Huazhong University of Science & Technology.

[5] C. Zhao, J. Zhang, J.H. Liu. Selective laser melting of 316L stainless steel powder molding process optimization, J. Journal of Heilongjiang Institute of Science &Technology. 1 (2013) 47-50.

[6] A.R. Yan T.T. Yang Y.L. Wanget al. Forming process and high-temperature mechanical properties of variable energy laser selective melting manufacturing IN718 super alloy [J]. Optics and Precision Engineering. 6 (2015) 1695-1704.

DOI: 10.3788/ope.20152306.1695

[7] W.H. Wu, Y.Q. Yang, D. Wang. Balling Phenomenon Selective Laser Melting Process, J. 5 (2010) 110-115.

[8] X.J. Wang. Process Parameters and Properties of Selective Laser Melting Al-Si Alloys [D]. Beijing: China University of Geosciences.