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周 斌,张婷,林 峰,郭 超,蔡振铭,孔 啸.电子束选区熔化成形Ti6Al4V和316L不锈钢叶轮体微观组织和力学性能的研究[J].稀有金属材料与工程(英文),2018,47(1):175~180.[Zhou Bin,Zhang Ting,Lin Feng,Guo Chao,Cai Zhenming,Kong Xiao.Study of microstructures and mechanical properties of Ti6Al4V and 316L stainless steel impeller body by electron beam selective melting[J].Rare Metal Materials and Engineering,2018,47(1):175~180.]
Study of microstructures and mechanical properties of Ti6Al4V and 316L stainless steel impeller body by electron beam selective melting
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Received:November 05, 2015  Revised:January 13, 2016
DOI:
Key words: additive manufacturing  electron beam selective melting  microstructures  mechanical properties  impeller body
Foundation item:国家重大基础研究项目(2012CB619506);国家自然科学基金青年基金(51405153,51475162);湖南省自然科学基金(14JJ5015)
Author NameAffiliationE-mail
Zhou Bin Key Laboratory for Advanced Materials Processing Technology,Ministry of Education of China,Key Laboratory for Biomanufaturing and Rapid Forming Technology,Beijing,Department of Mechanical Engineering,Tsinghua university zhoubin13@mails.tsinghua.edu.cn 
Zhang Ting 清华大学机械工程系  
Lin Feng Key Laboratory for Advanced Materials Processing Technology,Ministry of Education of China,Key Laboratory for Biomanufaturing and Rapid Forming Technology,Beijing,Department of Mechanical Engineering,Tsinghua university linfeng@tsinghua.edu.cn 
Guo Chao Key Laboratory for Advanced Materials Processing Technology,Ministry of Education of China,Key Laboratory for Biomanufaturing and Rapid Forming Technology,Beijing,Department of Mechanical Engineering,Tsinghua university  
Cai Zhenming Shanghai Electric Power Station Equipment Co,Ltd Shanghai Steam Turbine Factory  
Kong Xiao Shanghai Electric Power Station Equipment Co,Ltd Shanghai Steam Turbine Factory  
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Abstract:
      Ti6Al4V and 316L stainless steel impeller body were formed by electron beam selective melting (EBSM). By comparing the microstructure, dimensional accuracy, surface roughness, hardness, density and tensile strength of the impeller body, the feasibility of applying EBSM process in industrial impeller body manufacturing is evaluated. The results showed that: the tensile strength of Ti6Al4V and 316L stainless steel impeller body were 560MPa ~ 700 MPa and 996MPa ~ 1120MPa respectively, which were higher than the standard level of wrought, met the requirements of industrial use. The Ti6Al4V microstructure in the impeller body were basket-weave α+β, except those in leaf fragments were coarse flakes α + β phase because of their smaller cross-sections, and there were columnar crystals along the building direction. While the 316L stainless steel microstructure in the impeller body presented scaly scan path fusion marks, and there were some coarse dendrites.