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Ti3SiC2-based ceramic bonding agent diamond grinding tool and preparation method thereof

A ceramic bond and grinding tool technology, applied in metal processing equipment, grinding/polishing equipment, grinding devices, etc., to achieve good electrical and thermal conductivity, high refractoriness, and improved holding force

Inactive Publication Date: 2012-09-05
禹州市和汇超硬材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The technical problem to be solved by the present invention is to overcome the shortcoming of existing ceramic bond, propose a kind of new Ti 3 SiC 2 Vitrified bond and self-propagating sintering manufacturing method of the vitrified bond diamond tool

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0017] Embodiment 1: a kind of Ti 3 SiC 2 Ceramic-based bond diamond grinding tools, the bond of diamond grinding tools is Ti 3 SiC 2 base ceramics. Its preparation method is as follows: use simple Ti powder, Si powder and C powder as binder raw materials, mix them with diamond abrasives, use heat source to ignite, and rely on self-propagating sintering to form Ti 3 SiC 2 A composite of ceramic and diamond as the main phase.

[0018] Ti 3 SiC 2 The principle of self-propagating sintering preparation method for ceramic-based diamond grinding tools is as follows: a mixture of Ti powder, Si powder and C powder with a certain stoichiometric ratio can be ignited by a plasma arc or other heat sources at a certain temperature, and the reaction can generate Ti 3 SiC 2 , the heat released by the reaction can promote the overall reaction of the sample to proceed rapidly, and a self-propagating reaction occurs. During this period, Ti powder and Si powder can also react with dia...

Embodiment 2

[0019] Embodiment 2: a kind of Ti 3 SiC 2 The preparation method of base vitrified bond diamond grinding tool, its concrete method is as follows:

[0020] (1) Choose Ti powder with a particle size of 200-400 mesh, Si powder with a particle size of 200-400 mesh and C powder with a particle size of 200-400 mesh. Take, and fully ball mill and mix in a ball mill to obtain a uniformly mixed powder;

[0021] (2) mixing the powder obtained in step 1 with diamond abrasives to obtain a mixture;

[0022] (3) cold-pressing the mixed material obtained in step 2 into a required mold shape using a metal mold to obtain a cold-pressed compact;

[0023] (4) Use the plasma arc ignition device to ignite the cold-pressed compact obtained in step 3 or ignite it in a discharge plasma hot-press sintering machine in a graphite mold, and the compact will undergo a self-propagating sintering reaction to obtain Ti 3 SiC 2 Composites of ceramic and diamond as the main phase;

[0024] (5) trimming o...

Embodiment 3

[0026] Embodiment 3: a kind of Ti 3 SiC 2 The preparation method of base vitrified bond diamond grinding tool, its concrete method is as follows:

[0027] (1) Select Ti powder, Si powder and C powder with a particle size of 300 meshes, weigh them in a molar ratio of 3:1:2, and ball mill them in a planetary ball mill for 8 hours to obtain evenly mixed powders;

[0028] (2) be 140 / 170 diamond abrasive with step 1 gained powder and granularity by diamond concentration 60% (diamond content is 4.4 carats in every 1 cubic centimeter green body and is concentration 100%) and fully mixes;

[0029] (3) cold pressing the mixed material obtained in step 2 into a compact with a diameter of 30 mm and a length of 40 mm by using a metal mold;

[0030] (4) The cold-pressed compact obtained in step 3 is ignited by a plasma arc ignition device, and the compact undergoes a self-propagating reaction to obtain Ti 3 SiC 2 Composites of ceramic and diamond as the main phase;

[0031] (5) roundi...

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PUM

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Abstract

The invention discloses a preparation method of a Ti3SiC2-based ceramic bonding agent diamond grinding tool. Elemental Ti powder, Si powder and C powder are taken as bonding agent raw materials and are mixed with a diamond grinding material, and the mixture are ignited by a heat source, and are sintered by self-propagating to form a ceramic and diamond complex which takes the Ti3SiC2 as a main phase. The Ti3SiC2 bonding agent has low density, high melting point and high electrical conductivity, thermal conductivity, oxidation resistance and thermal shock resistance, and can form a carbide transition layer with carbon on the surface of diamond, so that the bonding agent and the diamond are well bonded through a chemical bond, and the holding force to the grinding material is improved. By the self-propagating sintering preparation method, preparation efficiency can be effectively improved, and energy consumption is reduced.

Description

technical field [0001] The present invention relates to the preparation technology of vitrified bond diamond grinding tool, relate in particular to Ti 3 SiC 2 Preparation method of self-propagating sintering of vitrified bond diamond grinding tools. Background technique [0002] Vitrified bonded diamond grinding tools are a kind of superhard material abrasive tools that are developing rapidly at present. They have high strength, good heat resistance, sharp cutting, high grinding efficiency, not easy to generate heat and blockage during grinding, and have small thermal expansion, etc. advantage. [0003] At present, vitrified bonds are mainly low-temperature oxides, which have the following disadvantages: (1) Due to the production of low-temperature bonds for diamond abrasive tools, in order to reduce the refractoriness, a large amount of alkaline materials are introduced into the bond, so that low-temperature vitrified bonds are obtained. Some properties are not easy to c...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B24D3/14B24D18/00
Inventor 穆云超梁宝岩卢金斌郭基凤彭竹琴郭建刘英
Owner 禹州市和汇超硬材料有限公司