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