Method for preparing hard alloy materials

Abstract

The invention relates to a method for manufacturing hard alloy materials, which comprises the following steps: 1. taking the following raw material substances in percentage by weight: 10 to 20 percent of composite hard phase tungsten carbide powder in a particle form of 10 to 15 microns, 20 to 30 percent of composite hard phase tungsten carbide powder in a particle form of 5 to 10 microns, 20 to 30 percent of composite hard phase tungsten carbide powder in a particle form of 1.0 to 1.5 microns, 1.5 to 2 percent of chromium carbide powder and 25 to 30 percent of cobalt powder; and 2. mixing the raw material substances according to the mixture ratio, grinding, pressing and forming the materials, then, carrying out heat insulation for 30 minutes under the condition between 1500 DEG C and 1600 DEG C, and obtaining the hard alloy materials. The method provided by the invention is simple and reliable, and the produced hard alloy materials belong to the hard alloy materials with the advantages of wear resistance, impact resistance, stable quality and bicrystal corrosion resistance.

Description

technical field [0001] The invention relates to a method for manufacturing hard alloy materials. Background technique [0002] At present, the main grades of cemented carbide plates are YG15, YG20, etc. In the production process of these grades, WC powder of a single specification is used for production. The disadvantage of a single powder is that it cannot make the material have the characteristics of high strength and high hardness at the same time. That is to say, the product cannot have the characteristics of wear resistance and impact resistance at the same time; while the bonding component is only one element of cobalt, but the oxidation resistance and corrosion resistance of cobalt are poor, which makes the plate prone to corrosion in wire cutting and EDM And defects such as cracks; at the same time, at high temperature, WC grains dissolve in liquid cobalt, which easily leads to abnormal growth of WC grains. With the expansion of the use range of cemented carbide pla...

AI Technical Summary

Problems solved by technology

[0002] At present, the main grades of cemented carbide plates are YG15, YG20, etc. In the production process of these grades, WC powder of a single specification is used for production. The disadvantage of a single powder is that it cannot make the material have the characteristics of high strength and high hardness at the same time. That is to say, the product cannot have the characteristics of wear resistance and impact resistance at the same time; while the bonding component is only one element of cobalt, but the oxidation resistance and corrosion resistance of cobalt are poor, which makes the plate prone to corrosion in wire cutting and EDM And defects such as cracks; at the same time, at high temperature, WC grains dissolve in liquid cobalt, which easily leads to abnormal growth of WC grains

With the expansion of the use range of cemented carbide plates and its application in various environments, traditional cemented carbide can no longer adapt to the increasingly complex and changeable working environment