The present report outlines the problems in the arc welding of steel sheets for automotive use and the latest study results related thereto. To effectively respond to the latest need for wider use of high-strength steel sheets of thinner gauges, it is necessary to enhance the reliability of weld joints of such materials through approaches from the material technology side. Recent research progresses of arc welding techniques are described, focusing on the automotive chassis members or body members. As for welded joint performance, static strength and fatigue strength are improved with increasing of steel strength less than 780 MPa tensile strength. Additionally, galvanized steel sheets contribute to corrosion resistance of weld parts. Developed welding materials have made it possible to improve welding activities such as reducing spatters, gap allowance or weldability of galvanized steel sheets. In contrast, components of the steel sheet also effects on welding phenomenon, a flat bead geometry is obtained by increasing Si content of steel sheets. Low heat input welding such as CMT (Cold metal transfer) welding has begun to be used for body welding and cross tension strength of advanced high tensile strength steel are improved by CMT applied arc spot welding. Nippon Steel intends to continue offering measures that realize these advantages of arc welding to the fullest extent to help obtain reliable joints; therefore, intends to support the automotive and other manufacturing industries.
Arc welding technology for automotive steel sheets
Lichtbogenschweißtechnik für Stahlbleche zum Fahrzeugbau
Nippon Steel Technical Report ; 103 ; 83-90
2013
8 Seiten, 18 Bilder, 18 Quellen
Article (Journal)
English
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