FIELD: processes and equipment for diffusion butt welding of short thick-wall tubes of different type steels.
SUBSTANCE: method comprises steps of placing between welded surfaces of two different type steels gasket of titanium or its alloy; compressing welding zone with effort no more than 0.2 kgf /sq.mm; heating it until temperature exceeding at least by 15 C temperature of creating liquid eutectics between titanium and one of welded steel; pressing liquid eutectics out off butt.
EFFECT: enhanced quality of welded joint at less compression efforts, elimination of blank creeping.
4 cl, 1 ex
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