A Study on Characteristics of Inconel 625 for Petroleum Application by FCAW Process ; Effect of Shield Gases Change Influence on a Mechanical Properties

J. Ocean Eng. Technol. 2004;18(6):96-100.

PARK KEYUNG-DONG;JIN YOUNG-BEOM;PARK HYOUNG-DONG;

Pukyoung National University Dept. of Mechanical Engineering;Pukyoung National University Dept. of Mechanical Engineering;Pukyoung National University Dept. of Mechanical Engineering;

석유시추용 인코넬 625강의 FCAW 용접에 관한 연구 ; 보호가스 변화가 기계적 성질에 미치는 영향

박경동;진영범;박형동;

부경대학교 기계공학부;부경대학교 기계공학부;부경대학교 기계공학부;

Keywords: High Temperature Tensile, Petroleum Application, FCAW, Shield Gas, Anti-corrosion

핵심용어: 고온인장, 석유시추, 플렉스코어 아크용접, 보호가스, 방식

Abstract

Inconel 625 is useful in a variety of industrial applications because of the resistance to attack in various corrosive media at temperatures from $200^{circ}C$ to over $1090^{circ}C$, in combination with good low and high temperature mechanical strength. Rencently this material has also been widely used in offshore processing piping in order to extend the maintenance term and improve the quality of anti-corrosion. In general, high quality weldings for this material are readily produced by commonly used processes. How, not all processes are applicable to this material group of Ni-alloys. Metallurgical or the unavailability of matching, position or suitable welding processes produce a lower quality. Nowadays, the flux cored wire is developed and applied for increased productivity in several welding positions, including the vertical position. In this study, the weldability and weldment characteristics(mechanical properties) of inconel 625 are considered in FCAW(Flux Core Arc Welding) associated with the several shielding gases$(80%Ar+20%CO2,;50%Ar+50CO2,;100CO2)$ in view of welding productivity.