튜브시트 오버레이의 내마모성 및 내부식성 향상을 위한 용접 변수의 결정에 관한 연구

Abstract

The Heat Exchanger for petrochemical industry, thermal power and nuclear power generation is sizable and it can cause a corrosion resistance or wear resistance problem sometimes. To solve this kind of problem, we use overlay welding where one or more metals with specific characteristics are applied to a base metal to improve corrosion resistance, wear resistance or heat resisting property. We usually recommend to use suitable thickness of the welding to improve productivity. There is many ways for overlay welding but in this study, GMAW (Gas Metal Arc Welding) and FCAW (Flux Cored Arc Welding) with overlay material such as A182F53, A182F51 and F316 on Carbon steel are mainly used at KJF Co.,Ltd. The results of the thickness of the welding are successful in assessment Criteria (ex. chemical composition measurement , bend test result, hardness test result, microscope analysis) from certification authority.