Formation of cracks in the selective laser melting of objects from powdered stainless steel 17-4 PH

International Scientific-technical Conference on Innovative Engineering Technologies, Equipment and Materials 2016

工业技术;机械制造;材料科学

Kashapov, R.N.^1,2 ; Kashapov, L.N.^1 ; Kashapov, N.F.^1

Engineering Institute, Kazan Federal University, Kazan

420008, Russia^1

Laboratory of Radiation Physics, Kazan Physical-Technical Institute, Kazan Scientific Center, Russian Academy of Sciences, Kazan

420029, Russia^2

关键词: Selective laser melting;    Steel powder;    Thick-walled;    Thin-walled;    Wax models;   

Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/240/1/012074/pdf
DOI  :  10.1088/1757-899X/240/1/012074

来源: IOP

【 摘 要 】

In the work, the process of selective laser melting of thick-walled objects of molds for wax models of 17-4PH steel powder on a ProX 300 was studied. The microstructure of the surface has been studied, the formation of cracks has been revealed and the possible reasons for their formation and propagation have been proposed. Analysis of selective laser melting of thin-walled objects revealed no cracks. To prevent the occurrence of cracks, it is necessary to warm the working platform to 200 °C.