A ceramic-metal composite bond grinding wheel and its preparation method

Abstract

The invention relates to a preparation method of a ceramic metal composite binding agent grinding wheel. The preparation method of the ceramic metal composite binding agent grinding wheel comprises the steps that (1), a liquid ceramic binding agent is prepared, specifically, a certain proportion of Al(NO3)3, H3BO3, LiNO3 and NaNO3 is dissolved in water, and then SiO2 sol is added to obtain the liquid ceramic binding agent; (2), a ceramic metal composite binding agent is prepared, specifically, diamond micro-powder and metal mixture powder are added to the liquid ceramic binding agent and mixedwell to obtain mixture slurry; (3), spray granulation is carried out, specifically, the mixture slurry obtained from the step (2) is subjected to spray granulation to prepare a molding material; and(4), sinter molding and post-processing are carried out, specifically, the molding material obtained from the step (3) is pressed and molded, sintered, trimmed and sharp fixed to obtain the ceramic metal composite binding agent grinding wheel. According to the preparation method of the ceramic metal composite binding agent grinding wheel, the microstructure consistency of the grinding wheel is improved, the phenomena of large dents, S-shaped cutting joints, burn, unstable cutting quality, uneven consumption speed, falling off of large pieces and the like caused by the prior art are solved, andmeanwhile, the grinding wheel further has higher strength and longer service life.

Description

Technical field [0001] The present invention belongs to the technical field of superhard material, and in particular to a ceramic metal composite binding agent grinding wheel and a preparation method thereof. Background technique [0002] In recent years, with the rapid development of high-speed grinding and ultra-fine grinding technology, the grinding wheel has been put forward higher requirements. Ceramic resin binding plants can no longer meet the production needs, the metal binding agent grinding wheel is strong, high combination strength, good wear resistance, high temperature resistance, good molding performance, long thermal conductivity, can withstand Grinding pressure, etc., in the grinding process of engineering ceramics, optical glass, hard alloy, etc., has been widely used. However, the metal binding agent is poorly poor, and the ceramic binding agent is often added to improve the rotation, and the conventional solid ceramic binding agent uses the solid phase mechanic...

AI Technical Summary

Problems solved by technology

However, metal bond grinding wheels have poor self-sharpening properties, and ceramic bonds are often added to improve self-sharpening properties, while traditional solid ceramic bonds are obtained by solid-phase mechanical crushing and sieving to obtain powders with a particle size of 1-100 μm. When the bonded grinding wheel is used, it will form a non-uniform structure centered on the bond, which cannot effectively coat the abrasive, reduce the strength of the bond and the holding force of the abrasive, and the larger piece of vitrified bond after sintering is easy to cut during cutting. Quality problems such as chipping

In addition, the composite binder adopts the traditional ball milling mixing method. First, the vitrified bond powder, metal micropowder, and abrasives are relatively fine, with poor fluidity, and are prone to agglomeration. The force is large, and it is not easy to mix evenly. The third is that the density and particle size of the metal micropowder and the abrasive are quite different. The microstructure of the grinding wheel is quite different, which leads to large chipping, serpentine kerf, burns, unstable cutting quality, uneven consumption speed, and large pieces falling off during the application process.

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