High-strength cutter processing method

Abstract

The invention discloses a high-strength cutting tool processing method, comprising the following steps: using 10-20% anorthite by weight percentage; 70-80% α-Si3N4 powder; 0.5-1.5% β-Si3N4 seed crystal, Aspect ratio of 3‑4:1; 1wt%‑2.8wt% of two or more rare earth metal oxide additives, the metal ion radius of rare earth metal oxides is distributed in steps, including Y2O3, Yb2O3; 1wt%‑2wt% A mixture of sub-densification additives MgO and AlN; mixed, ball milled, dried and put into a graphite grinding tool. Under the pressure of 10-15MPa in a hot-pressed sintering furnace, the temperature is raised to 1500-1600°C in N2 and kept for 2 ‑7min, then raise the temperature to 750‑1800°C for 20‑40min, then anneal at 1250‑1300°C for 1‑1.5 hours; then, use the prepared material to produce a blank tool, flat grind both sides, wire cutting, grinding, chamfering , Sharpened and made into high-strength knives. The processing method of the invention has reasonable technology, easy process control, stable quality of the produced finished product, high purity, high density, high strength, high temperature resistance, good wear resistance and low cost, and is worth popularizing.

Description

technical field [0001] The invention belongs to the field of cutting tool production, and in particular relates to a high-strength cutting tool processing method. Background technique [0002] With the development of high technology, the mechanical processing industry has put forward more stringent and demanding requirements for tool materials. Now it is necessary to process materials with higher hardness, higher cutting efficiency, and higher machining accuracy. This requires higher For the performance of cutting tools, traditional cutting materials such as high-speed steel are not hard enough, and scarce resources such as molybdenum and nickel are wasted, so ceramic cutting tools came into being. 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, but they are still fragile, poor heat dissipation, and po...

AI Technical Summary

Problems solved by technology

[0002] With the development of high technology, the mechanical processing industry has put forward more stringent and demanding requirements for tool materials. Now it is necessary to process materials with higher hardness, higher cutting efficiency, and higher machining accuracy. This requires higher For the performance of cutting tools, the hardness of traditional high-speed steel and other cutting materials is not enough, and the scarce resources such as molybdenum and nickel are wasted, so ceramic cutting tools came into being

Ceramic cutting tools have the characteristics of high hardness, high density, high temperature resistance, anti-magnetization, anti-oxidation, strong corrosion resistance, good chemical stability, high wear resistance, etc., but they are still fragile, poor heat dissipation, and poor thermal shock resistance. , limited anti-wear performance and other shortcomings, people need to find a better solution