Hard alloy based on tungsten carbide and preparation method of hard alloy

Abstract

The invention discloses a hard alloy based on tungsten carbide and a preparation method of the hard alloy. The hard alloy comprises a tungsten carbide hard phase and a binding phase, wherein the binding phase is a high-entropy alloy. The preparation method comprises the following steps of (1) weighing tungsten carbide powder in specific parts by mass and simple substance powder of each element in the high-entropy alloy; (2) mixing the tungsten carbide powder and the simple substance powder and then transferring into a ball mill to be subjected to ball milling, and obtaining a mixed material after drying; and (3) molding and sintering the mixed material to obtain the hard alloy based on tungsten carbide. According to the hard alloy, adverse effects of cobalt on health safety and environmental safety are reduced, the production cost of the hard alloy is reduced, and the bonding strength of the alloy is improved. According to the preparation method of the hard alloy, the process flow is reduced, the probability that the raw materials are polluted is reduced, and the preparation method has the advantages that the production cost of the hard alloy is reduced, and the quality of the hard alloy is improved.

Description

technical field [0001] The invention relates to the field of cemented carbide, in particular to a cemented carbide based on tungsten carbide and a preparation method thereof. Background technique [0002] Since cemented carbide was invented by Germans in the 1920s, WC-based cemented carbide with cobalt binder phase has been one of the most widely used cemented carbides in this field. Cemented carbide with nickel binder phase is also used. Iron is rarely used alone as a cemented carbide binder phase, and the amount of nickel and iron is far less than cobalt. [0003] Because cobalt is harmful to human health and the environment, and cobalt is expensive as a strategic resource, efforts to find cobalt substitutes have always been the goal pursued by people. Replacing cobalt or partially substituting cobalt will not have negative effects on the performance of cemented carbide. Influence is difficult. [0004] High-entropy alloys have excellent properties that some traditional ...

AI Technical Summary

Problems solved by technology

Document CN109161774A discloses "hard tungsten carbide alloy with high-entropy alloy as binder and preparation method thereof". After the metal powder is mixed, put it into the stainless steel ball mill tank of the planetary high-energy ball mill for ball milling. This method will easily cause the material of the stainless steel tank wall to enter the target powder, changing the composition ratio of the high-entropy alloy powder; document CN109022990A discloses "a kind of "Preparation method of high-entropy alloy binder phase Ti(C,N)-based cermet", the high-entropy alloy as the binder phase is composed of five elements, Co, Ni, Fe, Cu, and Mn, and the preparation of high-entropy alloy is also introduced A planetary high-energy ball mill with a stainless steel ball mill tank has the same problem as the document CN109161774A; other documents prepare high-entropy alloys, or use a stainless steel tank planetary ball mill or agitation high-energy ball mill, which increases the probability that the composition of the alloy powder is affected; Or increase the drying process of high-entropy alloy powder, resulting in waste of ball milling media