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A Study of Weldability and Welded Joint Performance on the Gas Shield Arc Welding (FCAW) of SM490TMC Steel Plate (120mm)

SM490TMC 극후판(120mm) 강재의 가스실드아크용접(FCAW)을 이용한 용접성 및 이음성능에 관한 연구

  • 김성배 (더나은구조엔지니어링) ;
  • 홍형주 (한국기술교육대학교, 건축공학) ;
  • 최영한 (한국기술대학교, 건축공학과) ;
  • 김상섭 (한국기술교육대학교, 디자인.건축공학부)
  • Received : 2017.08.14
  • Accepted : 2017.11.06
  • Published : 2017.12.27

Abstract

To figure out the weldability and welded joint performance on the FCAW of SM490TMC 120mm, several specimens were manufactured and 10 kinds of experiments were implemented. The result of the weld zone chemical composition test, weld metal tensile test, weld zone tensile test, and weld zone impact test has satisfied the KS. Especially, the weld zone tensile test result shows the base metal fracture, which means the weld zone performs enough required performance. In addition, the results of the weld zone bending test, hardness test, macroscopic test, microscopic test, and the maximum hardness in HAZ were showing that the FCAW weld zone has fine quality.

본 연구에서는 SM490 TMC 120mm 강재의 FCAW 용접성 및 이음성능을 확인하기 위해 공시체를 제작하고 10종의 시험을 실시하였다. 용접부 화학성분시험, 용착금속부 인장시험, 용접부 인장시험, 충격시험 결과는 KS를 만족하였다. 특히, 용접부 인장시험 결과, 모재에서 파단이 발생하였으며, 소요성능을 충분히 발휘하는 것으로 나타났다. 또한, 용접부 굽힘시험, 경도시험, 매크로시험, 마이크로시험 및 열영향부 최고경도시험 결과, FCAW는 양호한 용접부로 나타났다.

Keywords

References

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