Vitrified bond for high-strength and high-toughness grinding wheel, preparation method and application thereof

Abstract

The invention relates to a high-strength high-toughness grinding wheel ceramic bonding agent and a preparation method thereof. The preparation method comprises the following steps that silicon dioxide, diboron trioxide, aluminum oxide, lithium oxide, sodium oxide, calcium oxide, zinc oxide, barium oxide and titanium dioxide are mixed to obtain a mixture; the temperature of the mixture is raised to 600 DEG C at the temperature raising speed of 6-9 DEG C / min; then the temperature is raised to 1200 DEG C at the temperature raising speed of 3-6 DEG C / min; then the temperature is raised to 1450 DEG C at the temperature raising speed of 2-3 DEG C / min; then heat preservation is conducted; then an SG abrasive is added, heat preservation is continued, and molten liquid is obtained; and after the molten liquid is subjected to water quenching, wet grinding is conducted, then drying, smashing and dry grinding are conducted, the mixture passes through a 200-mesh sieve, and the high-strength high-toughness grinding wheel ceramic bonding agent is obtained. According to the high-strength high-toughness grinding wheel ceramic bonding agent and the preparation method thereof, a preparation method for a ceramic bonding agent is improved with microcrystal toughening and the operation that Al2O3 serves as a network intermediate to enhance a glass network structure as the theoretical basis, the obtained ceramic bonding agent has the characteristics of high strength and good toughness, and the requirements of preparation and usage of a CBN grinding wheel are met.

Description

technical field [0001] The invention belongs to the field of grinding wheel vitrified bonding agent, and in particular relates to a high-strength and high-toughness grinding wheel vitrified bonding agent and its preparation method and application. Background technique [0002] CBN grinding wheels mainly include resin bond CBN grinding wheels, metal bond CBN grinding wheels, and vitrified bond CBN grinding wheels. Due to the characteristics of CBN abrasives (high hardness, good toughness, good wear resistance, good thermal stability, and non-irophilicity), CBN grinding wheels are ideal for grinding ferrous materials, hard alloys, and powder parts. Tools not only have high efficiency and high precision, but also have good roughness, less consumption of abrasive tools, long service life, and can improve working conditions at the same time. With the development of modern industry and technology, CBN grinding wheels are widely used, especially in the processing of metal workpiec...

AI Technical Summary

Problems solved by technology

At present, resin bonded grinding wheels and metal bonded grinding wheels are the most common and widely used in domestic and foreign markets. However, resin bonded grinding wheels have poor heat resistance, water resistance and aging resistance, resulting in poor durability of resin bonded grinding wheels. The processing efficiency of the grinding wheel is low, the wear is large, the dressing and replacement are frequent, the size dispersion of the processed workpiece is large, and the quality of the processing tool is unstable. At the same time, the structure of the metal bond CBN grinding wheel is tight, and dressing is difficult. During the cutting process, the self-sharpening and sharpness of the grinding wheel are poor, it is easy to block and generate heat, and it is easy to cause physical damage such as impact and burn on the workpiece

At present, the demand for vitrified bonded grinding wheels in the domestic market is relatively large, and most of them rely on foreign imports to meet the needs of industrial production. room for improvement