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

A ceramic bond, grinding tool technology, applied in metal processing equipment, grinding/polishing equipment, grinding devices, etc., to achieve the effect of high fracture toughness, good electrical and thermal conductivity, and high melting point

Inactive Publication Date: 2011-07-06
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] Example 1: A kind of Ti 3 SiC 2 Based on vitrified bond diamond grinding tools, the bond of diamond grinding tools is Ti 3 SiC 2 base ceramics. The preparation method is as follows: using elemental Ti powder, Si powder and C powder as binder raw materials, mixing with diamond abrasive, igniting by heat source, and relying 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 the self-propagating sintering preparation method of the base vitrified bond diamond grinding tool is as follows: a mixture of Ti powder, Si powder and C powder in a certain stoichiometric ratio can be ignited by a plasma arc or other heat source 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, resulting in a self-propagating reaction. During the period, Ti powder and Si powder can als...

Embodiment 2

[0019] Example 2: A kind of Ti 3 SiC 2 The preparation method of the base ceramic bond diamond grinding tool, the specific method is as follows:

[0020] (1) The particle size is 200~400 mesh Ti powder, 200~400 mesh Si powder and 200~400 mesh C powder, and the molar ratio Ti:Si:C=2.9~3.1:0.95~1.05:1.9~2.1 is called Take, fully ball mill and mix in a ball mill to obtain uniformly mixed powder;

[0021] (2) the powder obtained in step 1 is mixed with diamond abrasive to obtain mixture;

[0022] (3) the mixture obtained in step 2 is cold-pressed into the required shape of the abrasive tool by using a metal mold to obtain a cold-pressed compact;

[0023] (4) the cold-pressed compact obtained in step 3 is ignited by a plasma arc ignition device or installed in a graphite mold and ignited in a discharge plasma hot-pressing sintering machine, and a self-propagating sintering reaction occurs in the compact to obtain a Ti 3 SiC 2 A composite of ceramic and diamond as the main phas...

Embodiment 3

[0026] Example 3: A kind of Ti 3 SiC 2 The preparation method of the base ceramic bond diamond grinding tool, the specific method is as follows:

[0027] (1) select granularity to be 300 purpose Ti powder, Si powder and C powder, take by molar ratio 3: 1: 2 ratio, ball mill 8 hours in planetary ball mill, obtain the powder that mixes homogeneously;

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

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

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

[0031] (5) rounding the composite o...

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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 invention relates to the preparation technology of ceramic bond diamond grinding tools, in particular to Ti 3 SiC 2 Self-propagating sintering preparation method of base vitrified bond diamond grinding tool. Background technique [0002] The vitrified bond diamond grinding tool is a kind of superhard material abrasive tool that is developing rapidly at present. It has high strength, good heat resistance, sharp cutting, high grinding efficiency, not easy to heat and block during grinding, and small thermal expansion, etc. advantage. [0003] At present, the ceramic bond is mainly a low-temperature oxide, which has the following disadvantages: (1) In order to reduce the refractoriness, a large amount of alkaline materials are introduced into the bond due to the low-temperature bond used in the production of diamond abrasive tools, so as to obtain a low-temperature ceramic bond. Some properties are not easy to control, such as refractoriness, low t...

Claims

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Application Information

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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