High-strength low-melting-point ceramic abrasive tool bonding agent and preparation method thereof

Abstract

The invention discloses a high-strength low-melting-point ceramic abrasive tool bonding agent and a preparation method thereof. The high-strength low-melting-point ceramic abrasive tool bonding agent is made of, by weight, 20%-40% of high-boron glass powder, 15%-20% of clay powder, 40%-60% of potassium feldspar powder, 4%-15% of LiO2 powder and 0.1%-2% of Y2O3 powder. The ceramic abrasive tool bonding agent prepared according to the method has the advantages of low melting point, wide sintering range, proper liquidity, excellent high-temperature wettability, high mechanical strength and the like, the problems of low grinding capability, poor abrasion resistance, short service life and the like in grinding of difficult-to-machine materials such as tool steel, tough stainless steel, heat-resisting alloy steel and the like are solved, and utilization speed of the bonding agent is higher than 80m / s. Refractoriness of the bonding agent is only 780-860 DEG C and far lower than 1150 DEG C, and consequently thermal energy can be greatly reduced to save energy resources, and production efficiency is improved.

Description

technical field [0001] The invention relates to abrasive materials, in particular to a high-strength low-melting point ceramic abrasive bond and a manufacturing method thereof. Background technique [0002] Vitrified bond generally refers to a mixture of various inorganic substances bonded to abrasives in abrasive tools. After long-term research and repeated experiments and comparisons, it is found that ordinary alumina and silicon carbide grinding wheels have a high performance in terms of grinding performance and grinding efficiency when grinding tool steel, ductile stainless steel, heat-resistant alloy steel and other difficult-to-machine materials. On the one hand, its own superior performance is completely lost, mainly in its low specific grinding energy, weak wear resistance, and short service life. When grinding the above-mentioned difficult-to-grind materials, the speed of the grinding wheel is usually required to reach 60m / s~120m / s or above, and the speed of the CB...

AI Technical Summary

Problems solved by technology

After long-term research and repeated experiments and comparisons, it is found that ordinary alumina and silicon carbide grinding wheels have a high performance in terms of grinding performance and grinding efficiency when grinding tool steel, ductile stainless steel, heat-resistant alloy steel and other difficult-to-machine materials. On the one hand, its own superior performance is completely lost, mainly in its low specific grinding energy, weak wear resistance, and short service life.

When grinding the above-mentioned difficult-to-grind materials, the speed of the grinding wheel is usually required to reach 60m / s~120m / s or above, and the speed of the CBN (cubic boron nitride) grinding wheel must also reach 120m / s or more, while the ordinary vitrified bond is the most It can only meet the use speed of 50m / s, and the ordinary vitrified bond has a high refractoriness, that is, a high melting point, generally higher than 1150°C, which will make certain abrasives, such as CBN and microcrystalline ceramic corundum, in the firing process The medium temperature is higher than 1150 ° C, and at this temperature the crystal size and structure of the abrasive are destroyed, which seriously affects the grinding performance of the grinding wheel

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