The experimental study is done for technological parameters of high-melting metal arc spraying to study the
influence of spraying current, spraying voltage and wire feed voltage on spraying arc and the influence of spraying current
on coating temperature and analyze theoretically the distribution rules of spray gun jet speed field and temperature field
and their influencing factors. The results showed that the arc current increases along with arc voltage increase. The lower
the spraying voltage is, the smaller the molten grain size becomes. However, if the arc voltage is lower than the minimum
critical arc voltage of the material, the arc could not keep smooth burning. The spraying current has correspondence
relationship with wire feed speed. The spraying current could be adjusted through wire feed speed adjustment.