페라이트계 스테인리스 강 MAG 용접의 기계적 물성에 관한 연구 |
, , , , |
|
A Study on the Mechanical Properties of MAG Weld on Ferritic Stainless Steel Sheets |
Gyeong-cheol Lee, Jae-seong Kim, Hyun-jae Kim, Kyoung-ho Lim, Bo-Young Lee |
|
Abstract |
Ferritic stainless steels have a good heat resistance and economic advantage. They are used for pplications such as automotive exhaust systems where resistance to general corrosion is superior to carbon teels. However, there are not enough research for ferritic stainless steels on weldability mainly used as utomotive exhaust manifolds. In this study, mechanical and microstructure properties of as-welded STS 29L and STS 444 ferrite stainless steels were confirmed by tensile, bending, hardness test, optical icroscopy and scanning electron microscopy. Tensile strength of the STS 444 is higher than the STS 29L when it is a raw material. In contrast to this fact, STS 429L indicated higher tensile strength after utt welded. In addition, the hardness have a increasing tendency as getting down on the bead. |
Key Words:
GMAW, MAG, Weldability, Ferritic stainless steel, STS 429L, STS 444, Solid wire STS430LNb |
|