| 摘要 |
PURPOSE:To uniformize a coating layer and to improve the adhesiveness to a base material, material strength, etc., by subjecting a specifically composed Ni-based super heat resisting alloy to a soln. heat treatment and coating the alloy with specifically composed alloy powder, then subjecting the alloy to a stabilizing treatment, aging treatment, etc. CONSTITUTION:The Ni-based super heat resisting alloy contg., by weight %, 12 to 25% Cr, 10 to 18% Co, 1 to 6% Ti, 1 to 6% Al, 2 to 8% Mo, 0.5 to 2.5% W, 0.02 to 0.12% C, 0.03 to 0.08% B, and the balance Ni and unavoidable impurities is subjected to the soln. heat treatment, then to machining and stress relieving. The alloy is then coated with the alloy powder of an MCrAlY (M is one or two kinds of Co, Ni and Fe) system by a low pressure plasma thermal spraying. The alloy is subjected to the stabilizing treatment and aging treatment when the stabilizing treatment temp. exceeds 950 deg.C in this case. The alloy is subjected to the soln. heat treatment, the stabilizing treatment and the aging treatment when then stabilizing treatment temp. is below 950 deg.C. |
