RESEARCH ARTICLE


The Theoretical and Experimental Investigation into Technological Parameters of High-Melting Metal Arc Spraying



C. H. Li*, S. Wang, Y. C. Ding
School of Mechanical Engineering, Qingdao Technological University, 266033 China.


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© 2012 Li et al;

open-access license: This is an open access article distributed under the terms of the Creative Commons Attribution 4.0 International Public License (CC-BY 4.0), a copy of which is available at: https://creativecommons.org/licenses/by/4.0/legalcode. This license permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited.

* Address correspondence to this author at the School of Mechanical Engineering, Qingdao Technological University, 266033 China; Tel: +86-532-85071757; Fax: +86-532-85071286; E-mail: sy_lichanghe@163.com


Abstract

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.

Keywords: High-melting, metal arc spraying, technological parameters, spraying current, spraying voltage, coating temperature.