High-speed tool steel for sintering procedure of metal injection molding

Abstract

The invention discloses high-speed tool steel for the sintering procedure of metal injection molding. The high-speed tool steel comprises a first powder body and a second powder body. The first powder body is the mother alloy phase metal powder body, and the second powder body is the ultrafine metal powder body or the nanometer metal powder body. According to the high-speed tool steel for the sintering procedure of metal injection molding, by adding the ultrafine metal powder body or the nanometer metal powder body of the proper proportion, the sintering temperature of the high-speed tool steel material is lowered, the problem of the narrow sintering window of the high-speed tool steel is solved, the product density is increased, and mechanical performance is improved; and the irregular metal powder bodies of the proper proportions play a bridging role among the components, so that deformation in the sintering process is avoided.

Description

technical field [0001] The invention relates to the technical field of high-speed tool steel, more specifically, the invention relates to a high-speed tool steel for metal injection molding sintering process. Background technique [0002] Because of its high hardness, tool steel is widely used in molds, fixtures, knives and metal materials that require high-speed cutting, such as: SKH51(M2), SKH10(T15), SKD61(H13), SKD11(D2)...etc. The traditional manufacturing method is to make ingots by smelting first, and then plastic processing such as forging and extrusion to make finished products. However, due to the smelting process, carbide segregation and grain coarsening are easy to occur. Or impurities or intermediate phases often have directionality, so their mechanical properties are not ideal. Another process is that the product obtained by traditional powder metallurgy dry pressing sintering or metal injection molding process has no melting process, so the product will not p...

AI Technical Summary

Problems solved by technology

Although low-temperature sintering can reduce product deformation, grain coarsening, and the formation of grain boundary network carbides, the product has low density and poor mechanical properties and cannot exert material properties.

Although the density of high-temperature sintered products can be increased, if the sintering temperature is too high, the product will be accompanied by deformation, grain coarsening and the formation of grain boundary network carbides, which will also reduce the mechanical properties of such materials.

[0003] The current known improvement method is to use super solidus and liquidus sintering technology and use a sintering furnace with high temperature uniformity, but the improvement effect is still limited

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