i want to know what is meant by hardfacing in welding ?
as i read when you determine the cost of welding : there are three approaches one is called cost per unit,cost per length , and cost per weight ( which the article said it is used for hardfacing applications requiring significant quantities of metal to be replaced by welding ) so i want to know what is the difference between them and what is meant by hardfacing application ??
here is the site for welding cost approaches :
http://weldingdesign.com/processes/news/wdf_10760/index.htmlthanks in advance
mohamed fatehy