Sungwoo Hitech Co., Ltd.

Pusan National University

Byung-Hun Jung

Mun Yong Lee

Mun-Yong Lee

Mun-Jong Song

Chung-Yun Kang

Tae-Il Kim

As to the method for fabricating a member of a vehicle, after a member for the vehicle having high-rigidity of martensite organization is fabricated by a hot stamping forming, the martensite organization is transformed to a ferrite having a low-rigidity partially and improved toughness or to a metal organization heat treated by tempering process through induction heating or secondary heat treatment using laser beam of conduction area, and thereby collision absorption performance is improved by stabilizing the absorption directivity of the collision energy without additional reinforcement.

Method for fabricating a member of a vehicle

The present invention provides a laser welding method for steel sheets. The laser welding method includes irradiating a low heat input laser beam to a weld zone with a uniform welding pattern of a zigzag shape, with a constant pitch, and with a constant welding speed, so that autogenous welding may be achieved without a feed wire, such that cost of material may be reduced and joinability and performance may be improved.

Laser welding method for steel sheet

Growing community of inventors

Pusan, South Korea

Byung-Hun Jung