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张梦晗,姜国圣,王鹏为,蒋靖宇,吴化波.选择性激光熔化制备纯钨的性能研究[J].稀有金属材料与工程(英文),2019,48(5):1645~1650.[zhangmenghan,jiangguosheng,wangpengwei,jiangjingyu and wuhuabo.Study on the Properties of Pure Tungsten Produced by Selective Laser Melting[J].Rare Metal Materials and Engineering,2019,48(5):1645~1650.]
Study on the Properties of Pure Tungsten Produced by Selective Laser Melting
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Received:October 09, 2017  Revised:January 05, 2018
DOI:
Key words: tungsten  selective laser melting(SLM)  heat treatment  mechanical property  microscopic structure
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zhangmenghan,jiangguosheng,wangpengwei,jiangjingyu and wuhuabo  
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Abstract:
      Pure tungsten powder of which the particle size distributed intensively is processed to different samples by selective laser melting(SLM). Then, the samples are preserved in temperature of 1000℃, 1400℃ and 1960℃ for 2h. The mechanical property and microstructure of the samples of different densities and different heat treatment temperatures are studied. The morphology and microstructure are characterized by SEM and XRD respectively. Result shows that the density ratios of the pure tungsten sample vary from 75% to 95%. Bending strength and microhardness increase with the raise of the density, but the microstructure difference between these samples is not obvious. After the heat treatment under different temperature, the mechanical property of the sample by 1400℃ treatment is better than other samples. Under 1960℃ heat treatment, the grain size of pure tungsten sample raises, leading to the decrease of mechanical property. The XRD result demonstrates that the grain structure of the pure tungsten sample does not change after 1960℃ heat treatment.