| 摘要 |
PROBLEM TO BE SOLVED: To provide the alloy foil for liquid phase diffusion joining of Fe base metal by which the joined part having uniform structure and enough joining strength is secured in the atmosphere and in short time for an object to be joined of a Fe base metal of thick steel plate, steel tube, steel bar, reinforcing rod, bar steel, etc. SOLUTION: The foil has a composition consisting of, by atomic %, 1.0-20.0% B, 1.0-10.0% S, 0.1-20.0%, as essential component and the balance substantially Fe with inevitable impurities and has a thickness of 3.0-100μm, further selectively containing, if necessary, a proper quantity of one or >=2 kinds among Cr, Ni, Co and/or one or >=2 kinds among W, Nb, Ti. The foil having crystal structure of structure essentially made of amorphous is more effective to this end.
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