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CMT+P过程及后热处理对TC4钛合金增材构件组织和性能影响

勾健, 王志江, 胡绳荪, 田银宝

勾健, 王志江, 胡绳荪, 田银宝. CMT+P过程及后热处理对TC4钛合金增材构件组织和性能影响[J]. 焊接学报, 2019, 40(12): 31-35,46. DOI: 10.12073/j.hjxb.2019400308
引用本文: 勾健, 王志江, 胡绳荪, 田银宝. CMT+P过程及后热处理对TC4钛合金增材构件组织和性能影响[J]. 焊接学报, 2019, 40(12): 31-35,46. DOI: 10.12073/j.hjxb.2019400308
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GOU Jian, WANG Zhijiang, HU Shengsun, TIAN Yinbao. Effects of CMT+P process and post heat treatment on microstructure and properties of TC4 component by additive manufacturing[J]. TRANSACTIONS OF THE CHINA WELDING INSTITUTION, 2019, 40(12): 31-35,46. DOI: 10.12073/j.hjxb.2019400308
Citation: GOU Jian, WANG Zhijiang, HU Shengsun, TIAN Yinbao. Effects of CMT+P process and post heat treatment on microstructure and properties of TC4 component by additive manufacturing[J]. TRANSACTIONS OF THE CHINA WELDING INSTITUTION, 2019, 40(12): 31-35,46. DOI: 10.12073/j.hjxb.2019400308
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CMT+P过程及后热处理对TC4钛合金增材构件组织和性能影响

  • 天津大学, 天津 300072;天津大学 天津市现代连接技术重点实验室, 天津 300072

基金项目: 国家自然科学基金资助项目（51575381）；天津市应用基础及前沿技术研究计划资助项目（15JCZDJC38600）

Effects of CMT+P process and post heat treatment on microstructure and properties of TC4 component by additive manufacturing

  • Tianjin University, Tianjin 300072, China;Tianjin Key Laboratory of Advanced Joining Technology, Tianjin University, Tianjin 300072, China

摘要

    摘要
  • 摘要: 采用CMT+P程序进行TC4钛合金焊丝电弧增材制造，针对增材过程中热积累造成的组织性能不均匀性，采用两种不同热处理工艺以期改善这种不均匀性，并提高增材构件性能. 结果表明，采用CMT+P进行增材制造可以获得成形良好的沉积零件，当送丝速度为6 m/min，焊枪行走速度为0.3 m/min时，其热输入为313 J/mm， 沉积零件显微组织从上至下不断粗大. 热处理后试样不同部位晶粒大小变得均匀，抵抗塑性变形的能力增强. 拉伸试验表明，在600℃，4 h热处理条件下，构件的抗拉强度最高，为1 124 MPa. 断口分析表明， 所有试样断裂方式均为韧性断裂.
    Abstract: CMT + P procedure was used in wire and arc additive manufacturing of TC4 titanium alloy. Aiming at inhomogeneity in microstructure and properties by heat accumulation in addictive manufacturing process, two heat treatment processes were used to improve the inhomogeneity and promote the performance of component by addictive manufacturing. The results showed that the as-built wall in a good appearance can be obtained with CMT+P procedure. When the wire feeding speed is 6 m/min and the welding torch speed is 0.3 m/min, the heat input is 313 J/mm, and the microstructure of as-built wall is continuously growing from bottom to top. The grain size for different positions of sample becomes uniform and the resistance to plastic deformation for the sample is enhanced after heat treatment. Tensile testing shows that the component has the highest tensile strength of 1 124 MPa under 600℃ and 4 h condition. The fracture analysis shows that all the fracture modes are ductile fracture.
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    • 参考文献(13)
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  • 收稿日期:  2019-04-07

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