Spot weldability of δ-TRIP steel containing 0.4 wt-%C

H. L. Yi, K. Y. Lee, J. H. Lim and H. K. D. H. Bhadeshia


Strong steels are usually difficult to resistance spot weld because of the tendency to form hard phases. This applies particularly to the transformation induced plasticity (TRIP) assisted steels with relatively high carbon equivalents. A new development in this context is the δ-TRIP steel, designed to retain d-ferrite as a stable phase at all temperatures below melting. Fully martensitic regions are therefore avoided, making it possible to weld in spite of the high carbon concentration. The authors present here the first spot welding tests on the novel alloy system.

Science and Technology of Welding and Joining 15 (2010) 619-624.

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