Method for preparing tungsten molybdenum copper composite material by microwave sintering

Abstract

The invention discloses a method for preparing a tungsten molybdenum copper composite material by microwave sintering. The method comprises the steps: firstly, ball milling tungsten powder, molybdenumpowder and copper powder, fully and evenly mixing, putting the evenly-mixed powder into a mold and pressing the evenly-mixed powder into a green body of a cylindrical structure; then putting the green body into a microwave sintering furnace and utilizing a specific thermal treatment technology to prepare the tungsten molybdenum copper composite material under a lower temperature. Directed to theproblems of a traditional method for preparing tungsten molybdenum copper alloy in the prior art, the invention provides the method for preparing the tungsten molybdenum copper composite material by microwave sintering. Compared with the existing traditional method, the method can reduce a preparation temperature to 700 to 1,000 DEG C from 1,100 to 1,600 DEG C and further can shorten the preparation time to 20 to 50 min from 100 to 760 min; furthermore, the method disclosed by the invention can finish a densification process only through three steps of powder mixing, pressing and sintering, sothat a technology is simplified, easiness in implementation is achieved, and a product with finer and evener grains and an excellent mechanical property can be obtained. The defects of high sinteringtemperature, long sintering time, complex technology and the like of the existing traditional sintering method are solved.

Description

technical field [0001] The invention belongs to the technical field of composite material preparation, and in particular relates to a preparation method of microwave sintered tungsten-molybdenum-copper composite material. Background technique [0002] Both W-Cu and Mo-Cu alloys are composite materials composed of two-phase mixed structures that neither solid solution with each other nor form intermetallic compounds. W-Cu has the characteristics of good arc erosion resistance, welding resistance, high strength and high hardness, and is widely used in electronics, military equipment, aerospace and other new technology fields. Although Mo-Cu can largely However, its high temperature strength and ablation resistance are still not competent in high temperature and harsh environments, so it can only be used in some occasions with low operating temperature, such as air rudders, counterweights, connecting plates, etc. Therefore, on the basis of W-Cu alloy, some Mo is used to replac...

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Problems solved by technology

Compared with the existing traditional method for preparing tungsten-molybdenum-copper composite materials, the microwave sintering method is applied to sintering and preparing W-Mo-Cu alloy, the preparation temperature can be reduced from 1100~1600℃ to 700~1000℃, and the preparation time can also be reduced from 100~ 760min is shortened to 20~50min, the tungsten and molybdenum grains are fine and tightly bonded, saving more than 70% energy than the traditional sintering method, which solves the shortcomings of the existing traditional methods such as high sintering temperature, long sintering time, and complicated process

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