Titanium-aluminum-molybdenum alloy target material and preparing method thereof

Abstract

The invention discloses a titanium-aluminum-molybdenum alloy target material and a preparing method thereof. The preparing method comprises the steps that titanium powder, aluminum powder and molybdenum powder are mixed under the protection of vacuum or high-purity argon; the mixed mixture powder is pressed through isostatic cool pressing, and a titanium-aluminum-molybdenum alloy blank is obtained; the titanium-aluminum-molybdenum alloy blank is subjected to shaping treatment, and the titanium-aluminum-molybdenum alloy blank is made into a preset shape; the titanium-aluminum-molybdenum alloy blank obtained after the shaping treatment is put into a wrapping sleeve to be subjected to degasification; the wrapping sleeve obtained after the degasification treatment is sealed and welded, and then an alloy ingot blank is obtained through hot isostatic pressing sintering; and the pressed alloy ingot blank is subjected to machining and cleaning in sequence, and the titanium-aluminum-molybdenumalloy target material is obtained. The prepared titanium-aluminum-molybdenum alloy target material has the advantages of being high in compactness, free of gas holes and segregation, uniform in texture, fine in grain, various in specification and dimension and the like.

Description

technical field [0001] The invention belongs to the field of preparing new materials by powder metallurgy, and in particular relates to a titanium-aluminum-molybdenum alloy target material and a preparation method thereof. Background technique [0002] In recent years, the rapid development of the machinery manufacturing industry has put forward higher requirements for the performance stability and service life of mechanical parts. Usually, high-speed machine parts and tool surfaces are prone to wear, especially under some extreme conditions, which will generate a lot of heat and accelerate the wear of the coating, so these surfaces with relative motion need to have sufficient hardness and good wear resistance and lubrication performance, to reduce the loss caused by high-speed friction, thereby prolonging the service life of the machine. After continuous exploration, it is found that coating the tool surface with a hard coating is one of the effective methods to increase t...

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Problems solved by technology

[0005] However, when the titanium-aluminum-molybdenum alloy target is manufactured by vacuum melting and casting, the melting point of molybdenum is as high as 2620°C and the density is 10.2g / cm 3 , while the melting point of aluminum is 660°C, and the density is only 2.7g / cm 3 , the melting points and densities of the three alloys are quite different, it is difficult to guarantee the uniformity of the product in vacuum melting, and a variety of brittle phases are produced, which makes the product easy to crack; when the hot pressing method is used to manufacture the titanium aluminum molybdenum target, the production of the target is limited by the equipment It is difficult to achieve large size, and at the same time, the internal density distribution of the hot-pressed target is uneven, and the density difference between the middle and the edge is as high as 5%, and it is difficult to obtain a high-quality and high-density target.

[0006] Because the production technology of titanium-aluminum-molybdenum alloy target is difficult, there are few literatures on its research, and there are few patented technologies.

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