东北大学学报（自然科学版）

东北大学学报(自然科学版) ›› 2011, Vol. 32 ›› Issue (10): 1448-1451.DOI: -

• 论著 • 上一篇    下一篇

等离子喷涂薄壁零件涂层中的残余应力

牛丽萍;张廷安;史冠勇;豆志河;   

  1. 东北大学材料与冶金学院;
  • 收稿日期:2013-06-19 修回日期:2013-06-19 发布日期:2013-04-04
  • 通讯作者: -
  • 作者简介:-
  • 基金资助:
    国家自然科学基金资助项目(50644016,50704011,50874027,51074044);;

Residual stresses of plasma-spraying coating of thin-walled part

Niu, Li-Ping (1); Zhang, Ting-An (1); Shi, Guan-Yong (1); Dou, Zhi-He (1)   

  1. (1) School of Materials and Metallurgy, Northeastern University, Shenyang 110819, China
  • Received:2013-06-19 Revised:2013-06-19 Published:2013-04-04
  • Contact: Niu, L.-P.
  • About author:-
  • Supported by:
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摘要： 以等离子喷涂零件为研究对象,提出了薄壁零件与厚壁零件的概念,并建立了一种基于叠加原理的残余应力计算模型.计算结果表明:在涂层中既可能产生拉应力,也可能产生压应力;喷涂零件残余应力极限值位于基体与涂层的结合区域;增层模型和应力叠加方法可有效估算残余应力的松弛;估算值与测量值吻合得较好;热膨胀系数、基体预热温度、涂层厚度对残余应力的影响较大.研究结果对等离子喷涂涂层的设计具有一定的参考价值.

关键词: 等离子喷涂, 残余应力, 数学模型, 叠加原理, 薄壁零件

Abstract: A concept of thin-walled and thick-walled parts was proposed for plasma-spraying coating parts, and a mathematical model based on superposition principle established to calculate residual stresses. The results showed that both tensile stress and compressive stress may arise in the coating. The limit value of residual stress appears in the combination zone of substrate and coating. The relaxation of residual stress was effectively estimated with layer model and stress superposition method. The experimental results agree with the calculated results. The effect of thermal expansion coefficient, preheating temperature of substrate and coating thickness on residual stress is great. These results may provide a valuable reference for the design of plasma spraying coating.

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