Journal of Welding and Joining

The Korean Welding and Joining Society (대한용접접합학회)
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Welding Characteristics of Aluminized Steel Sheet by Nd:YAG Laser(II) - Behavior of Al element in the weld -

Nd:YAG 레이저를 이용한 알루미늄도금강판의 용접성(II) - 용접부내 알루미늄의 거동 -

  • 김종도 (한국해양대학교 기관시스템공학부) ;
  • 이정한 (한국해양대학교 대학원) ;
  • 김기철 (포항산업과학연구원 용접센터)
  • Published : 2007.08.31
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Abstract

Aluminized steel sheet is a material with excellent heat resistance, thermal reflection and corrosion resistance. It has wide applications, owing to its low cost and excellent performance, in the petrochemical industry, electric power and other energy conversion systems, etc and has attracted the attention of many investigators. But the welding of aluminized steel sheet has a problem of decreasing tensile-shear strength, caused by mixed Al in the weld. This study investigated behavior of Al and its structural properties to resolve this problem. Several analysis equipment(SEM, EDX, EPMA) were used to investigate Al element in the weld. Also microhardness tester and TEM equipment were used to find the intermetallic compound. As a result of this study, Al-rich zones existed in the weld and Fe-Al intermetallic compounds were found in these zones. At the same time, the weldability of aluminized stainless steel sheet was investigated and compared with that of aluminized steel sheet. Although there is a difference between the base metal of the low carbon steel and stainless steel, it is interpreted that a behavior of Al element in the weld is similar.

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References

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