Research of densification of 316L stainless steel powder in selective laser melting process
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School of Mechanical & Automotive Engineering, South China University of Technology, Guangzhou 510640, China;
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2.
Guangzhou Riton Laser Co.LTD., Guangzhou 510388, China
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Corresponding author:
YANG Yong-qiang, meyqyang@hotmail.com
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Received Date:
2009-08-19
Accepted Date:
2009-08-26
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Abstract
In order to study the relationship between process parameters and densification of melted parts formed by selective laser melting,several specimens were formed by scanning strategy with adjacent layers staggered and different scanning space,scanning speed and laser power in independently developed selective laser melting equipment DiMetal-280,using 316L stainless steel powder.Microscope was employed to observe and analyze the surface morphologies of specimens and the densification was measured with water-draining method.Results showed that densification increased when scanning strategy with adjacent layers staggered was employed under reasonable process parameters,however,decreased with increasing of scanning space due to the changes of track overlapping and also decreased when scanning speed was too low or too high or when practical thickness of powder changed in the beginning of process.The density of 316L stainless steel part formed by selective laser melting can be further improved based on the research.
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