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伍 方,孙中刚,李邦怿,陈 颢,郭圣达,朱玉斌.SLM激光单道扫描成型纯钨薄壁件的研究[J].稀有金属材料与工程(英文),2020,49(10):3490~3497.[Wu Fang,Sun Zhonggang,Li Bangyi,Chen Hao,Guo Shengda and Zhu Yubin.Research on Pure Tungsten Thin Wall Part Fabricated by Laser Single Track Scanning via SLM[J].Rare Metal Materials and Engineering,2020,49(10):3490~3497.]
Research on Pure Tungsten Thin Wall Part Fabricated by Laser Single Track Scanning via SLM
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Received:October 12, 2019  Revised:November 19, 2019
DOI:
Key words: selective laser melting  pure tungsten thin wall part  thin wall thickness, molten trace width  powder adhesive
Foundation item:国家自然科学基金(51875274,51464013);江西省自然科学基金(20181BBE58001);江西省教育厅科学基金(GJJ180431);江西理工大学博士科研启动项目(jxxjbs18041)
Author NameAffiliation
Wu Fang,Sun Zhonggang,Li Bangyi,Chen Hao,Guo Shengda and Zhu Yubin  
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Abstract:
      This paper fabricated pure tungsten thin wall parts by laser single track scanning via SLM. The wall thickness and molten trace width were measured by two-dimensional imager and optical microscope, respectively, and the influence of laser power and scanning rate on the wall thickness and molten trace width were investigated. The surface 2D and 3D morphology of thin walls were detected by optical microscope. The powder adhesion on the side surface of the thin wall was detected by scanning electron microscope and the reason for powder adhesion was analyzed. The results indicated that the walls thickness was greater than molten trace width. With the increase of laser power, the wall thickness amd molten trace width increased, the surface of thin wall became smooth. With the increase of scanning rate, the wall thickness and molten trace with decreased, the molten trace became twisted first and then straight, and twisted again, the height difference of the molten trace decreased first and then increased. The thin wall consisted of complete melting zone, balling zone, semi-melting zone and unmelted zone.