Fe-Si-B合金非晶質箔のスポット溶接

概要

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The possibility of the welding of amorphous metal foils was examined. Fe_<78>Si_9B_<13> amorphous metal foil having 20 microns in thickness was welded by using a stored energy type spot welding machine. This foil was possible to weld without crystallization at a welding time within 0.4 milliseconds. The irregularity of weld nugget shape was due to the unevenness of the foil surfaces employed. This resulted in the scattering of tensile-shear strength of single spot welds. Increasing weld time with the use of the capacitor bank having excessive capacitance led to a brittle weld nugget, though crystallization did not occur. In tension-shear test, a crack initiated near the periphery of the weld nugget and propagated in the base metal. It means that the enhancement of joint strength was difficult by multiple spot welding.
社団法人溶接学会の論文
1989-05-05