A ceramic particle planting process based on spark discharge

Abstract

A ceramic particle planting process based on spark discharge. The process prepares a conductive film on the surface of the ceramic particle to be planted; places the coated ceramic particle on the surface of the metal substrate as required; connects the electrode to the positive electrode on the spark discharge equipment , the metal substrate is connected to the negative electrode, and the relevant process parameters are adjusted after power-on to contact the electrode with the top of the particle; the pulse discharge between the electrode and the conductive film of the particle generates heat to melt the electrode and produce molten droplets, which drop on the surface of the ceramic particle and wrap it; ceramic The pulse discharge between the particle conductive film and the metal substrate melts the substrate to form pits and wraps the particles; the molten droplets formed by melting the electrode and the substrate fuse with each other to form a metallurgically bonded wrapping layer, completing the ceramic particle planting process. The invention utilizes the ultra-fast and high-energy-density micro-welding metallurgical properties of electric spark pulse discharge to obtain an abrasive coating in which ceramic particles are metallurgically combined with a base body, while having minimal thermal influence on the base body.

Description

technical field [0001] The invention relates to a ceramic particle planting process based on spark discharge, which belongs to the technical field of abrasive tool preparation. Background technique [0002] Abrasive tools play an important role in the industrial field. At present, abrasive tools are mainly divided into three categories according to the preparation process, namely, electroplated abrasive tools, brazed abrasive tools, and sintered abrasive tools. Electroplated abrasive tools use nickel or nickel alloy as the coating metal bond, which has the advantages of simple electroplating process, convenient preparation and use, less equipment investment, no need for trimming, and high precision. The holding strength of the metal to the abrasive is low. During the heavy-duty high-efficiency grinding process, it is easy to cause the overall failure of the tool due to the peeling off of the abrasive or the peeling off of the plated metal. If the method of increasing the th...

AI Technical Summary

Problems solved by technology

However, high-temperature brazing will also cause greater thermal damage to abrasives (commonly used such as diamond, cubic boron nitride, etc.), and the mechanical properties (strength, wear resistance) of abrasives will be greatly lost, resulting in unsatisfactory brazing abrasive tools. Therefore, how to avoid or reduce the thermal damage caused by the high-temperature brazing process to the abrasive is one of the focus of future research.

[0003] To sum up, the current abrasive tools basically have weak binding force and thermal damage to the abrasive during the preparation process. It is necessary to develop a new preparation process to avoid such problems, so as to improve the use effect and service life of abrasive tools.

Images