Influence of trailing cooling on temperature field and microstructure properties of wire arc additive manufacturing

GAO Mingjiang; FAN Ding; HOU Yingjie; NI Donglin

doi:10.7512/j.issn.1001-2303.2021.08.13

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Influence of trailing cooling on temperature field and microstructure properties of wire arc additive manufacturing
Vol. 51, Issue 8, Pages: 105-110(2021)
DOI： 10.7512/j.issn.1001-2303.2021.08.13

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GAO Mingjiang, FAN Ding, HOU Yingjie, et al. Influence of trailing cooling on temperature field and microstructure properties of wire arc additive manufacturing. [J]. 51(8):105-110(2021)
DOI：

GAO Mingjiang, FAN Ding, HOU Yingjie, et al. Influence of trailing cooling on temperature field and microstructure properties of wire arc additive manufacturing. [J]. 51(8):105-110(2021) DOI： 10.7512/j.issn.1001-2303.2021.08.13.

摘要

针对电弧增材制造过程中严重的热积累所导致的成形件成形质量差、尺寸精度低以及晶粒粗大等问题,提出通过随弧激冷电弧增材制造方法来改善电弧增材制造过程中的热积累。采用数值模拟与试验相结合的方法研究随弧激冷对电弧增材制造过程温度场的影响,分析施加冷源对成形件的成形质量以及组织性能的影响。结果表明,施加冷源能够有效改善电弧增材制造过程中的热积累,提高成形件的成形质量以及尺寸精度,优化成形件的显微组织以及力学性能。

Abstract

To solve the problems of poor forming quality,low dimensional accuracy and coarse grains of the formed parts caused by the serious heat accumulation in the process of wire arc additive manufacturing,trailing cooling wire arc additive manufacturing method was proposed to improve the heat accumulation. Numerical simulation and experiments were used to study the effect of trailing cooling on the temperature field of wire arc additive manufacturing process and analyze the effect of cold source on the forming quality,microstructure and mechanical properties of the formed parts. The results show that the application of cold source can effectively improve the heat accumulation in the manufacturing process and the forming quality and dimensional accuracy of the formed parts,meanwhile,optimize the microstructure and mechanical properties of the formed parts.