Novel ceramic corundum grinding tool of low-temperature and high-strength ceramic bonding agent and preparation method thereof

Abstract

The invention discloses a novel ceramic corundum grinding tool of a low-temperature and high-strength ceramic bonding agent. The grinding tool consists of the following components in percentage by mass: 15 to 20 percent of ceramic bonding agent, 80 to 85 percent of novel ceramic corundum grinding material and 5 percent of bonding wetting agent, wherein the bonding agent consists of the following components in percentage by mass: 10 to 30 percent of clay, 10 to 30 percent of feldspar, 45 to 70 percent of borosilicate glass, 0 to 15 percent of kryocide, 0 to 5 percent of quartz and 0 to 5 percent of magnesium oxide. The novel ceramic corundum grinding tool can be sintered at the sintering temperature of 850 to 980 DEG C, and by the grinding tool, a grinding wheel can be safely used at the rotation speed of 80 to 100m/s. The single-travel feeding amount of the grinding tool can be over 0.3mm, the metal removing rate is over 3 times that of an ordinary corundum grinding wheel, the grinding interval time is 3 to 5 times that of the ordinary corundum grinding wheel, the service life is 5 to 10 times that of the ordinary corundum grinding tool, and the novel ceramic corundum grinding tool is superior to a super-hard grinding tool and the ordinary grinding tool in performance and price.

Description

technical field [0001] The invention relates to grinding tools, in particular to a low-temperature high-strength vitrified bond novel corundum (SG, or Seeded Gel) abrasive tool and a preparation method thereof. Background technique [0002] The new ceramic corundum abrasive is a high-purity corundum abrasive with fine crystal structure synthesized by unique ceramic technology. This kind of abrasive is synthesized by Sol-gel (sol-gel) process and sintered. Ordinary fused corundum abrasives are made of industrial alumina as raw material, melted in an electric arc furnace, crushed, ground, and classified to obtain corundum abrasives of different particle size levels. The preparation methods of the two abrasives are different, so they are quite different in structure and performance. Specifically in the following aspects: [0003] In terms of microstructure, ordinary fused corundum abrasives contain only a small amount of single crystals (sometimes only one single crystal) in ...

AI Technical Summary

Problems solved by technology

[0007] The preparation process of new vitrified corundum abrasive tools with vitrified bond is basically the same as that of ordinary corundum abrasive tools with vitrified bond. However, due to the requirements of the structure and speed of use of new vitrified corundum abrasives, the traditional common vitrified bond can no longer meet the requirements of new ceramic corundum abrasives. Preparation requirements for corundum abrasives

On the one hand, the sintering temperature of traditional ceramic bond ordinary corundum abrasives is around 1250°C, while the new ceramic corundum abrasives will be affected by high temperature during high temperature firing, resulting in grain growth and destroying their original microstructure and performance. As a result, it loses or loses its superior characteristics in grinding and use, thereby affecting its proper grinding effect, so it should generally be fired at a temperature lower than 1000 ° C; on the other hand, the traditional ceramic bond ordinary corundum abrasive The use speed generally does not exceed 60m / s, and the use speed of the new ceramic corundum abrasive tools must meet the use speed requirements of 80-120m / s. Higher, and at the same time, the price can not increase too much compared with the traditional vitrified bond

Images