Heat treatment process for improving mechanical property of tungsten-tantalum-nickel-titanium alloy

Abstract

The invention discloses a heat treatment process for improving the mechanical property of a tungsten-tantalum-nickel-titanium alloy. The heat treatment process comprises the following steps that S1, the tungsten-tantalum-nickel-titanium alloy to be treated is heated to the solid solution temperature, heat preservation is conducted for a period of time, and oil cooling is conducted to the room temperature; the solid solution temperature ranges from 850 DEG C to 1080 DEG C; and S2, the tungsten-tantalum-nickel-titanium alloy obtained after solution treatment is heated to the aging temperature, heat preservation is conducted for a period of time, and the tungsten-tantalum-nickel-titanium alloy is cooled to the room temperature. According to the method, the Ni3Ti phase in the binding phase in the tungsten-tantalum-nickel-titanium alloy manufactured through vacuum sintering after cold isostatic pressing forming is subjected to high-temperature solid solution and low-temperature aging treatment, the Ni3Ti phase in the binding phase can be effectively reduced or removed, and therefore the non-uniformity of the microstructure of the tungsten-tantalum-nickel-titanium alloy is improved, and the mechanical property of the tungsten-tantalum-nickel-titanium alloy is improved. The process is simple and controllable, the obtained product is excellent in performance, and large-scale industrial application is facilitated.

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