Preparation method of toughened cutter material

Abstract

The invention provides a preparation method of a toughened cutter material. The preparation method comprises the following steps: (1) dissolving a dispersant and tert-butyl alcohol by stirring; (2) adding boron carbide, a binder, nano silicon nitride, polyvinyl alcohol, modified nano silicon dioxide, magnesium borate crystal whiskers and river snail shell powder, and uniformly carrying out stirring; (3) adding ammonia water to regulate the pH of the system to be 8.5; (4) transferring the obtained system to a ball mill for ball milling; (5) transferring the system to a vacuum exhauster for degassing; (6) pouring the obtained substance into a mold, immersing the mold in liquid nitrogen, and rapidly solidifying the obtained slurry to obtain a porous green body; (7) carrying out freeze-dryingon the green porous body; and (8) sintering the blank in air, exhausting air in a furnace by vacuumizing, then introducing argon gas as a protective atmosphere, and simultaneously continuing carryingout heating for liquid-phase sintering to obtain the material. The material prepared by the method has light weight, very high hardness and high bending strength, and most importantly, the anti-fracture effect is good.

Description

technical field [0001] The invention relates to a preparation method of a toughened tool material. Background technique [0002] With the rapid development of construction, transportation, aerospace and electronic industries, human beings have put forward higher requirements for the application performance of materials. Knife material is one of them. The tool material was originally metal material, but the metal material has the disadvantages of heavy quality and high price. With the development of metal matrix composite materials, ceramic metal composite materials are also used as tool materials. It has both metal and The advantages of ceramics not only have high specific strength, high specific modulus, wear resistance, light weight, and can withstand high working temperature, but also have good thermophysical properties, and their demand is increasing. But unfortunately, such materials are still rarely commercialized. The reasons are: first, the production cost is high a...

AI Technical Summary

Problems solved by technology

But unfortunately, such materials are still rarely commercialized. The reasons are: first, the production cost is high and secondary processing is difficult; second, as the content of ceramic reinforcement increases, the toughness of the composite material decreases, and the fracture work Reduced, unstable performance, and not safe to use, this is also the bottleneck problem that ceramic particle reinforced metal matrix composites have not solved for many years

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