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,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.]
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
投稿时间:2015-11-05  修订日期:2016-01-13
中文关键词:  增材制造  电子束选区熔化  微观组织结构  力学性能  叶轮体
基金项目: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)
中文摘要:
      采用电子束选区熔化技术制造了Ti6Al4V和316L不锈钢两种不同材料的叶轮体,通过对比分析微观组织结构,测量尺寸精度,表面粗糙度,硬度,致密度和抗拉强度等方面性质,探讨利用增材制造技术制造叶轮体在工业上运用的可行性。结果表明:制造的Ti6Al4V和316L不锈钢叶轮体抗拉强度分别为560MPa~700 MPa和996MPa~1120MPa,均高于一般锻造标准强度水平,达到工业使用要求。钛合金叶轮体内部存在沿成形方向生长的柱状晶,组织为网篮组织,而成形截面较小的区域晶粒较为粗大,为粗片状的α+β相。不锈钢叶轮体内部存在有规律的鱼鳞状的扫描道熔合痕迹,存在部分粗化的枝晶。
Study of microstructures and mechanical properties of Ti6Al4V and 316L stainless steel impeller body by electron beam selective melting
英文关键词:additive manufacturing  electron beam selective melting  microstructures  mechanical properties  impeller body
英文摘要:
      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.
作者单位E-mail
周 斌 清华大学机械工程系 zhoubin13@mails.tsinghua.edu.cn 
张婷 清华大学机械工程系  
林 峰 清华大学机械工程系 linfeng@tsinghua.edu.cn 
郭 超 清华大学机械工程系  
蔡振铭 上海电气电站设备有限公司上海汽轮机厂  
孔 啸 上海电气电站设备有限公司上海汽轮机厂  
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