Importance

Loading Importance Indicators...

Abstract

A method for the fabrication of a resistance spot weld containing not more than two Liquid Metal Embrittlement cracks having a depth of 100 μm or more, the method includes the following successive steps of providing at least two first zinc or zinc-alloy coated sheets having a first steel substrate of a first steel, with TS>900 MPa, a thickness of the zinc or zinc-alloy coated sheets being between 0.5 and 2.5 mm; measuring C1_av(100), Si1_av(100), Mn1_av(100), Al1_av(100), Cr1_av(100), designating respectively the average content of C, Si, Mn, Al, Cr in the zone D₁₀₀ of the first steel substrate comprised between 0 and 100 micrometers under the zinc or zinc-alloy coating; then calculating a factor CSI₁ of the first steel CSI₁=C1_av(100)+(Si1_av(100)/32)+(Mn1_av(100)/14)−(Al1_av(100)/48)+(Cr1_av(100)/11) then; performing resistance spot welding on at least 10 welds with a certain intensity. A second steel sheet can be provided depending on measurements.

Loading the Abstract Image...

First Claim