Self-fluxing alloy spray coating film

Abstract

The present invention provides a self-fluxing alloy spray coating film having both wear resistance and thermal shock resistance. The self-fluxing alloy spray coating film comprises: a first phase containing 50 mass% or more of Ni and less than 5 mass% of W; a second phase containing less than 50% by mass of Ni, 30% by mass or more of W, and a carbide or boride of W; and a third phase that satisfies at least one of the following (1)-(3) and contains a carbide or boride of W, Cr, or Mo. (1) contains 5% by mass or more and less than 30% by mass of W, (2) contains 30% by mass or more of Cr, (3) contains 20% by mass or more of Mo, the Vickers hardness of the first phase is 180 or more and less than 400 (Hv 0.05), the Vickers hardness of the second phase is 900 or more and less than 2200 (Hv 0.05), and the Vickers hardness of the third phase is 400 or more and less than 2200 (Hv 0.05).

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