等离子喷焊工艺参数的快速计算方法研究

Study on the rapid computation method of plasma spray welding process parameters

针对等离子喷焊工艺参数不易调节的问题,研究了可快速确定等离子喷焊工艺参数的计算方法。该方法可快速确定合适的转移弧电流、喷焊速度和送粉速率等参数,容易获得较优的等离子喷焊工艺参数组合。通过在Q235基材上喷焊Ni60a合金粉末,进行不同喷焊层厚度的等离子喷焊工艺实验研究,对该计算方法进行验证。结果表明:使用该方法计算所得的工艺参数,可获得喷焊层与基材结合良好、表面硬度高的喷焊层,其表面最低硬度大于Hv 730,最高硬度可达Hv 804。

Because of the difficulty in regulating the process parameters of plasma spray welding, a rapid computational method were investigated to quickly attain the appropriate parameters, such as transferred arc current, spray welding speed, and powder feeding rate, and a process parameter combination of plasma spray welding could be easily acquired. To verify this rapid computational method, a process experiment was designed that the Ni60a alloy powders were sprayed on Q235 substrates by plasma spray welding in different coating thickness. The experimental result suggests that, the spraying layer can be obtained by using the process parameters calculated by this computational method, showing good adhesion with substrates and high surface hardness, the minimum and maximum hardness of coating surface is Hv 730 and Hv 804, respectively.