东北大学学报（自然科学版）

东北大学学报(自然科学版) ›› 2010, Vol. 31 ›› Issue (4): 519-522.DOI: -

• 论著 • 上一篇    下一篇

等离子喷涂薄壁工件涂层中温度场解析

牛丽萍;张廷安;赫冀成;豆志河;   

  1. 东北大学材料与冶金学院;
  • 收稿日期:2013-06-20 修回日期:2013-06-20 出版日期:2010-04-15 发布日期:2013-06-20
  • 通讯作者: -
  • 作者简介:-
  • 基金资助:
    国家自然科学基金资助项目(50704011,50874027);;

Temperature field analysis of plasma-sprayed coatings for thin-wall parts

Niu, Li-Ping (1); Zhang, Ting-An (1); He, Ji-Cheng (1); Dou, Zhi-He (1)   

  1. (1) School of Materials and Metallurgy, Northeastern University, Shenyang 110004, China
  • Received:2013-06-20 Revised:2013-06-20 Online:2010-04-15 Published:2013-06-20
  • Contact: Niu, L.-P.
  • About author:-
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摘要： 沉积层中的热梯度及涂层与基体材料热膨胀系数的差异是引起等离子喷涂残余应力的主要原因.考虑到喷涂子层增厚,建立起基于喷涂颗粒沉积过程温度场的解析模型.在分析中同时考虑了热传导、热辐射对涂层的影响,计算了在不同的基体-涂层体系下涂层的温度场.结果表明,涂层沉积过程中升温过程分为两个阶段:初级阶段,即体系温度不超过相应喷涂材料熔点的15%;完成阶段,即涂层与基体达到热平衡后继续升温到最高温度,并在界面处结合最终形成残余应力.

关键词: 等离子喷涂层, 温度场, 基体, 残余应力

Abstract: The causes of residual stress in plasma sprayed coating are mainly the thermal gradient in deposited layers and the different heat expansion coefficients of coating and substrate. Taking account of the increment in thickness of each layer sprayed, an analytical model of temperature field was developed for the sprayed particles in their deposition process, where the composite effects of heat transfer and thermal radiation on the coating were also considered. Thus, the coating's temperature field was calculated for different substrate-coating systems. The results revealed that temperature rise during the deposition of layers can be divided into two stages, i.e., the temperature of the substrate-coating system does not exceed 15% the melting point of the material being sprayed; the temperature of the system rises continuously and achieves the maximum value after the heat balance between the substrate and coating, then the residual stress forms on the interface between substrate and coating.

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