• CN：11-2187/TH
  • ISSN：0577-6686
机械工程学报

›› 2014, Vol. 50 ›› Issue (18): 43-49.

• 论文 • 上一篇    下一篇

扫码分享

基于均匀设计的NiCr-Cr3C2超声速等离子喷涂工艺参数优化研究

许中林;董天顺;康佳杰;赵雪勃;王海斗;李国禄   

  1. 河北工业大学材料科学与工程学院;装甲兵工程学院装备再制造技术国防科技重点实验室;中国地质大学(北京)工程技术学院
  • 发布日期:2014-09-20

Parameters Optimizing of NiCr-Cr3C2 Coating Deposited by Supersonic Plasma Spraying Based on Uniform Design

XU Zhonglin; DONG Tianshun; KANG Jiajie; ZHAO Xuebo; WANG Haidou; LI Guolu   

  1. School of Materials Science and Engineering, Hebei University of Technology;National Key Lab for Remanufacturing, Academy of Armored Forces Engineering;School of Engineering and Technology, China University of Geosciences(Beijing)
  • Published:2014-09-20

PDF

361

摘要： 运用均匀化设计方法研究超声速等离子工艺参数对涂层的孔隙率和显微硬度的影响。利用逐步回归的数学方法回归分析喷涂电压、喷涂电流、氩气流量和喷涂距离对孔隙率、显微硬度的综合作用。回归分析表明，三次多元多项式和二次多元多项式分别适合于表征上述工艺参数对涂层孔隙率和显微硬度的影响规律。对孔隙率回归方程和显微硬度回归方程进行数学处理并分析表明，超声速等离子喷涂NiCr-Cr3C2的最佳工艺参数对应的喷涂电压、喷涂电流、氩气流量和喷涂距离分别185 V，375 A，110 L/min和107 mm，该参数下的涂层孔隙率为1.07%，显微硬度值为1 097 HV0.3。经验证，孔隙率及显微硬度回归方程分别适合于表征喷涂电压、喷涂电流、氩气流量和喷涂距离等工艺参数与NiCr-Cr3C2涂层孔隙率及显微硬度的关系。

关键词: 超声速等离子喷涂;均匀设计;NiCr-Cr3C2;孔隙率;显微硬度;回归分析

Abstract: The Uniform Design method is used to investigate the effects of processing parameters on the porosity and micro-hardness of NiCr-Cr3C2 coating. The comprehension effects of the processing parameters, spray voltage, spray current, argon gas flow rate and spray distance, are analyzed using stepwise regression method. The results show that the third-order and the second-order polynomial regressed equations are the most appropriate equations to identify the influences of the processing parameters mentioned above on the porosity and micro-hardness. As a result of the regressed polynomial which is analyzed in mathematic ways, the most suitable processing parameters by means of uniform design experiment are acquired and the spray voltage, spray current, argon flow rate and spray distance are 185 V, 375 A, 110 L/min and 107 mm respectively. The porosity and micro-hardness of coating prepared at the most suitable processing parameters are 1.07 % and 1 097 HV0.3 respectively. The verification experiment shows that the equations acquired are proper to identify the relationship between the spray parameters investigated(spray voltage, spray current, argon gas flow rate and spray distance) and the porosity and micro-hardness of NiCr-Cr3C2 coating.

Key words: supersonic plasma spray;uniform design;NiCr-Cr3C2;porosity;micro-hardness;regression analysis

中图分类号: 

版权所有 © 2019 《机械工程学报》编辑部 | 京ICP备05055788号-30