Characteristics of CO₂ Laser welded 1000 ㎫ Grade TRIP Steel

• 영문명: Characteristics of CO₂ Laser welded 1000 ㎫ Grade TRIP Steel
• 발행기관: 한국레이저가공학회
• 저자명: W.Q. Wang, C.Y. Kang(강정윤) T.K. Han(한태교) M.S. Kwon(권민석)
• 간행물 정보: 『한국레이저가공학회 학술대회 논문집』2007년도 춘계학술발표대회 논문집, 57~60쪽, 전체 4쪽
• 주제분류: 공학 > 기계공학
• 파일형태: PDF
• 발행일자: 2007.06.30

영문 초록

  Characteristics of CO₂ laser welded 1000 ㎫ grade Transformation Induced Plasticity steel were investigated under varying welding power, welding speed and different shield gas. Decreasing welding power, increasing welding speed or using mixed gas (Ar+He) reduced the porosity in the weld metal. Weld metal (WM) and HAZ near the WM had maximum hardness. In tensile strength test of load perpendicular to the weld axis, the specimens had same tensile properties as that of raw material. For the load parallel with the weld axis, the specimens prepared with Ar had equal yield strength (YS) and tensile strength (TS) to that of raw material. But the elongation was lower than that of raw material. The specimens prepared with He had higher YS, TS and lower elongation compared with that of raw material. Welded material had lower formability than that of the raw material. The formability of specimens prepared with low welding power or Ar+He was improved compared with that of specimens prepared using high power or Ar.

목차

ABSTRACT
1. Introduction
2. Experimental procedures
3. Results and Discussion
4. Conclusions
References

키워드

CO₂ laser welding TRIP steel Mechanical property Porosity