Preparation process of self-sharpening metallic bond diamond abrasive layer

A metal bond and preparation process technology, applied in the field of abrasive tool processing, can solve the problems of difficult control of self-sharpening of finished products, increased manufacturing process difficulty, complex material composition, etc., and achieve the effects of low cost, convenient operation and high preparation efficiency

Active Publication Date: 2022-01-14
SHANDONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Self-sharpening is related to the bond type of diamond abrasive tools. Metal bonded abrasive tools have high strength, good geometric shape retention of the working surface, impact resistance, and higher holding force on diamond than resin and ceramic bonds, but self-sharpening poor
[0003]In order to improve the self-sharpening of metal bonded diamond abrasive tools, materials that can reduce the wear resistance of metal bonds and make holes are added when manufacturing abrasive layers. However, the composition of the material is relatively complex, the difficulty of the manufacturing process increases accordingly, and the self-sharpening of the finished product is difficult to control
The existing metal bond diamond abrasive layer preparation process includes hot-press sintering, electroplating and brazing. Hot-press sintering easily causes diamond graphitization and phase transition of metal materials. Electroplating and brazing diamond abrasive tools only have a single-layer structure, and the abrasive layer Thin and requires frequent replacement

Method used

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  • Preparation process of self-sharpening metallic bond diamond abrasive layer
  • Preparation process of self-sharpening metallic bond diamond abrasive layer
  • Preparation process of self-sharpening metallic bond diamond abrasive layer

Examples

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Embodiment 1

[0033] The present embodiment provides a kind of self-sharpening metal bond diamond abrasive layer preparation process, such as figure 1 shown, including:

[0034] Mix the basic constituent materials of the abrasive layer according to the set ratio;

[0035] Pretreat the surface of the abrasive tool substrate to obtain a good interface and promote the combination with the abrasive layer;

[0036] Spray the mixed material on the surface of the pretreated abrasive tool substrate by cold spraying to form an abrasive layer;

[0037] Controlling the gap and pore content of the hard and brittle intermetallic compounds formed in the abrasive layer through the heat treatment process to obtain a controllable self-sharpening abrasive layer.

[0038] Further, the basic constituent materials of the abrasive layer include diamond micropowder, high-purity Ni powder and high-purity Al powder, and the mass ratio of each component is: 20-50% of diamond, 30-50% of high-purity Ni powder, and 3...

Embodiment 2

[0053] The preparation process of the self-sharpening metal bond diamond abrasive layer of the present embodiment comprises the following steps:

[0054] Step 1. Mix the basic constituent materials of the abrasive layer according to the set ratio:

[0055] The basic composition material of the abrasive layer is a mixture of high-purity Ni powder 9, high-purity Al powder 10, and core-shell diamond micropowder 8, wherein the high-purity Ni powder 9 has an electrolytic irregular shape and is nearly spherical on the whole, 5-10 μm; High-purity Al powder 10 is prepared by gas atomization, spherical particles, 13-30 μm; core-shell diamond powder 8 has a diamond abrasive grain size of W28, 20-38 μm, and two layers are plated on its surface by chemical plating technology Metal, the middle layer is Ti, the weight gain ratio is 5%, the outermost layer is Ni, the weight gain ratio is 100%, and the coating thickness is 2.6-5.0 μm.

[0056] In order to achieve a higher degree of self-shar...

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Abstract

The invention discloses a preparation process of a self-sharpening metallic bond diamond abrasive material layer, and belongs to the technical field of abrasive tool processing. According to the technical scheme, basic composition materials of the abrasive material layer are mixed according to a set proportion; the surface of an abrasive tool base body is pretreated, and the mixed materials are sprayed to the pretreated surface of the abrasive tool base body through cold spraying to form the abrasive material layer; and the gap and pore content of a hard and brittle intermetallic compound generated in the abrasive material layer is controlled through a heat treatment process, and the abrasive material layer with the controllable self-sharpening performance is obtained. The abrasive material layer has controllable self-sharpening performance, good mechanical performance and a long service life, the manufacturing process is simple, and efficiency is high.

Description

technical field [0001] The invention relates to the technical field of abrasive tool processing, in particular to a preparation process for a self-sharpening metal bond diamond abrasive layer. Background technique [0002] Self-sharpening is an important evaluation index of diamond abrasives. Abrasives with poor self-sharpening are easy to clog, diamond abrasive grains are difficult to expose, and cannot be processed continuously; abrasive tools with good self-sharpening can break diamond abrasive grains after they are blunted. Or fall off, revealing the sharp edge again. Self-sharpening is related to the bond type of diamond abrasive tools. Metal bonded abrasive tools have high strength, good geometric shape retention of the working surface, impact resistance, and higher holding force on diamond than resin and ceramic bonds, but self-sharpening poor. [0003] In order to improve the self-sharpening of metal-bonded diamond abrasive tools, materials that can reduce the wear...

Claims

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Application Information

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IPC IPC(8): B24D18/00B24D3/10B24D3/34
CPCB24D18/0054B24D18/0072B24D18/009B24D3/10B24D3/342
Inventor 刘战强张志成宋清华王兵蔡玉奎
Owner SHANDONG UNIV
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