A kind of preparation method of microcrystalline corundum ceramic grinding disc

Abstract

The invention relates to the technical field of grinding material and grinding tool preparation and in particular provides a high-performance microcrystalline fused alumina ceramic abrasive disc and a method for preparing the same. The microcrystalline fused alumina ceramic abrasive disc contains, in percentage by weight, 20-60% of modified microcrystalline fused alumina abrasive materials, 5-30% of fused alumina zirconia, 5-30% of monocrystalline fused alumina, 5-20% of high temperature calcinated fused alumina, 4-6% of phenolic resin liquid, 8-18% of phenolic resin powder, 2-8% of filler, and 3-9% of an additive. The preparation method comprises the steps of preparing phenolic resin modified liquid, preparing modified microcrystalline fused alumina abrasive materials, and performing shaping and hardening. The microcrystalline fused alumina ceramic abrasive disc has the advantages of low manufacture cost and long service life; the binding force between resin and abrasive material particle is great and the holding force applied to abrasive material particles by resin is great, so that the cutting and grinding efficiency of the abrasive disc are improved greatly.

Description

technical field [0001] The invention relates to the technical field of preparation of abrasive materials, in particular to a high-performance microcrystalline corundum ceramic grinding disc and a preparation method of the grinding disc. Background technique [0002] Microcrystalline corundum ceramic grinding discs have the characteristics of good toughness, strong self-sharpening, sharp abrasive grains, good durability of grinding discs, no burning of workpieces during grinding, high grinding efficiency and long service life of grinding discs. However, microcrystalline corundum ceramic grinding discs often encounter the following problems in conventional production: (1) Since the microcrystalline corundum abrasive is not easily wetted by the resin solution, the bonding between the microcrystalline corundum abrasive particles and the binder (phenolic resin) is not good. Well, the utilization rate of microcrystalline corundum abrasive will be greatly reduced. How to achieve go...

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Problems solved by technology

However, microcrystalline corundum ceramic grinding discs often encounter the following problems in conventional production: (1) Since the microcrystalline corundum abrasive is not easily wetted by the resin solution, the bonding between the microcrystalline corundum abrasive particles and the binder (phenolic resin) is not good. Well, the utilization rate of microcrystalline corundum abrasive will be greatly reduced. How to achieve good bonding between microcrystalline corundum abrasive and bonding agent has an important impact on the performance of microcrystalline corundum ceramic grinding discs; (2) due to the price of microcrystalline corundum abrasive It is very high. The use of microcrystalline corundum abrasives to make grinding discs is not only costly, but also the service life and cutting and grinding effects are not very good. The application of component material ratio is the key element of grinding disc manufacturing technology; (3 ) During the hardening process of microcrystalline corundum ceramic grinding discs after molding, if the hardening curve is unreasonable, there will often be incomplete volatilization of free phenol, poor compactness of the resin hardened structure, poor bonding force of the resin, and poor wear resistance, making the resin resistant to wear. The holding force of abrasive particles is not enough, resulting in low cutting and grinding efficiency

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