A kind of high toughness ceramic knife material and preparation method thereof

Abstract

The invention relates to a high-toughness ceramic knife material which is prepared from the following raw materials in parts by weight: 0.4-0.5 part of kieselguhr, 2-3 parts of tung oil, 3-4 parts of spodumene, 3-4 parts of kaolin, 2-3 parts of carrageenin, 4-6 parts of mullite crystal whisker, 1.5-1.8 parts of Cr powder, 33-38 parts of nano titanium carbide, 40-45 parts of nano titanium nitride, 10-14 parts of silicon carbide, a right amount of deionized water, 1-1.4 parts of polyacrylic acid, 0.7-1.2 parts of polyethyleneglycol, a right amount of ethylene glycol and 3-4 parts of wear-resistant assistant. The ceramic has the advantages of low cost, simple technique and excellent overall performance; and the knife made of the ceramic material has the advantages of favorable fracture toughness, favorable bending strength, favorable hardness, favorable wear resistance, long service life and reasonable cost performance. The mullite crystal whisker is utilized to enhance the toughness and wear resistance of the ceramic. The wear-resistant assistant can enhance the surface smoothness, wear resistance and heat resistance of the ceramic.

Description

technical field [0001] The invention relates to the field of ceramic cutting tool materials, in particular to a high-toughness ceramic tool material and a preparation method thereof. Background technique [0002] Ceramic cutting tools have the characteristics of high hardness, high density, high temperature resistance, anti-magnetization, anti-oxidation, strong corrosion resistance, good chemical stability, and high wear resistance. They are good substitutes for traditional cutting tools such as high-speed steel. The problem of scarcity of resources such as molybdenum and nickel has been solved. However, the current ceramic cutting materials still have problems such as high cost, insufficient toughness, high brittleness, uneven hardness, poor heat dissipation, and poor self-lubrication, which need to be solved. Contents of the invention [0003] The purpose of the present invention is to provide a high toughness ceramic knife material and its preparation method. The ceram...