Multi-layer composite hard alloy product

Abstract

The invention discloses a multi-layer composite hard alloy product. The multi-layer composite hard alloy product comprises a first hard alloy, a second hard alloy and a third hard alloy; the first hard alloy, the second hard alloy and the third hard alloy have different components, grain sizes or phase structures. The first hard alloy is arranged between the second hard alloy and the third hard alloy; both the second hard alloy and the third hard alloy are adhered to the surface of the first hard alloy. According to the multi-layer composite hard alloy product, three hard alloys with differentcomponents, grain sizes and phase structures are adhered together; the three hard alloys are plugged together under the connecting action of the hard alloy connecting rods, and then are extruded; thehard alloy product is compounded in the mode, so that a multi-layer composite hard alloy product is formed; requirements in the aspects of strength, toughness, wear resistance and the like can be metsimultaneously; moreover, the composite structure is very simple and is convenient to operate.

Description

technical field [0001] The invention relates to the technical field of cemented carbide powder metallurgy, in particular to a multilayer composite cemented carbide product. Background technique [0002] In the field of cemented carbide products, under many working conditions, the performance requirements of various parts of cemented carbide products are different. Some parts require high wear resistance, while others require high toughness. Therefore, a single component Or cemented carbide products with single grain size or single phase structure cannot meet the above requirements. [0003] In the prior art, in order to meet the requirements of different parts of cemented carbide products under specific working conditions, a gradient cemented carbide product is usually designed and produced. This technology mainly uses physical or chemical methods to make the components of different parts of the product , Grain size or phase structure produces differences, so that a gradual...

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Problems solved by technology

Products with such a gradient interface have greater advantages in interfacial bonding strength, and can meet the requirements for mechanical properties such as strength, toughness, hardness, etc. of cemented carbide products at different parts or stages, but this gradient There are also obvious defects in cemented carbide products and their manufacturing methods: the production cost is high, and the process of forming a gradual gradient is complicated and difficult to control, resulting in unstable performance of the final product, poor repeatability, reliability and consistency. poor

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