| LASER TAILOR-WELDED BLANKS FOR HOT-PRESS-FORMING STEEL WITH ARC PRETREATMENT |
| M. KANG1, C. KIM1, S. M. BAE2 |
1korea institute of industrial technology
2Hanbat National University |
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| ABSTRACT |
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Tailor-welded blanks (TWBs) are made of sheets with various strengths or thicknesses that ensure increased material strength without significantly increasing the weight. In this study, Al?Si-coated hot-press-forming steel sheets were subjected to laser butt welding for making TWBs. After laser welding, the welded blanks were heated and subsequently quenched to simulate a thermal cycle in the hot-press-forming process, and the properties of the welded joints were examined. Arc pretreatment was applied before laser welding, and its influence on the mechanical and metallurgical properties of the welds was analysed. |
| Key Words:
Boron alloy steel, Tailor-welded blank, Laser welding, Al–Si coating, Arc pretreatment |
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