Ti3AlC2-radical ceramic bond and cubic boron nitride (CBN) grinding tool and manufacturing method

A technology of cubic boron nitride and vitrified bond, which is applied in the direction of grinding equipment, manufacturing tools, grinding/polishing equipment, etc., to achieve the effects of reducing energy consumption, low density, and improving holding force

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

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0017] Embodiment 1: a kind of Ti 3 AlC 2 Base vitrified bond cubic boron nitride grinding tool, the bonding agent of the cubic boron nitride grinding tool is Ti 3 AlC 2 base ceramics. The production method is as follows: use simple Ti powder, Al powder, and C powder as binder raw materials and mix them with cubic boron nitride abrasives, use heat source to ignite, and rely on self-propagating sintering to form Ti 3 AlC 2 A composite of ceramics and cubic boron nitride as the main phase.

[0018] Ti 3 AlC 2 The principle of ceramic-bond cubic boron nitride grinding tools prepared by self-propagating sintering is: a mixture of Ti powder, Al 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 AlC 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 pe...

Embodiment 2

[0019] Embodiment 2: a kind of Ti 3 AlC 2 The manufacture method of base vitrified bond cubic boron nitride grinding tool, its

[0020] The specific method is as follows:

[0021] (1) Select Ti powder with a particle size of 200-400 mesh, Al 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;

[0022] (2) mixing the powder obtained in step 1 with cubic boron nitride abrasives to obtain a mixture;

[0023] (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;

[0024] (4) The cold-pressed compact obtained in step 3 is ignited by a plasma arc ignition device or ignited in a discharge plasma hot-press sintering machine in a graphite mold, and the cold-pressed compact undergoes a self-propagating sintering reaction to obtain Ti 3 AlC 2 Composites of ceramics and cubic ...

Embodiment 3

[0027] Embodiment 3: a kind of Ti 3 AlC 2 The manufacture method of base vitrified bond cubic boron nitride grinding head, its concrete method is as follows:

[0028] (1) Select Ti powder, Al 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;

[0029] (2) be that 140 / 170 cubic boron nitride abrasive material is 140 / 170 cubic boron nitride abrasive material with step 1 gained powder (in every 1 cubic centimeter green body, cubic boron nitride content is 4.4 carats and is concentration 100%) fully mix;

[0030] (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;

[0031] (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 AlC 2 Composites of ceramics ...

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Abstract

The invention discloses a manufacturing method for a Ti3AlC2-radical ceramic bond and cubic boron nitride (CBN) grinding tool, which comprises the following steps: adopting elementary Ti powder, Al powder and C powder as raw materials of a binding agent to be mixed with a CBN grinding material, utilizing a heat source for ignition, and forming a ceramic and CBN compound taking the Ti3AlC2 as a main phase by means of self-propagating sintering. The Ti3AlC2 binding agent has lower density, high melting point, good conductivity and thermal conductivity, excellent inoxidizability and thermal shock resistance, and can react with partial CBN to generate nitride and boride transition layers, so that the excellent chemical bond combination between the binding agent and the CBN is achieved, and the holding force of the grinding material can be improved. With adoption of self-propagating sintering preparation method, fast sintering can be realized, the preparation efficiency can be effectively enhanced, and the energy consumption is lowered.

Description

technical field [0001] The present invention relates to the preparation technology of ceramic bond cubic boron nitride grinding tool, especially relates to Ti 3 AlC 2 Self-propagating sintering preparation method of ceramic bond cubic boron nitride grinding tool. Background technique [0002] Ceramic bonded cubic boron nitride grinding tool is a kind of superhard material grinding tool with relatively rapid development at present. It has high strength, good heat resistance, sharp cutting, high grinding efficiency, and is not easy to generate heat and block during the grinding process. Small quantity and other advantages. [0003] At present, the commonly used vitrified bond has the following disadvantages: (1) Due to the low-temperature bond used in the production of superhard material abrasive tools, in order to reduce the refractoriness, a large amount of alkaline materials are introduced into the bond, so that the low-temperature vitrified bond is obtained, and its vari...

Claims

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Application Information

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IPC IPC(8): B24D3/14B24D18/00
Inventor 穆云超郭建樊平郭基凤赵慧君梁宝岩张瑞杰
Owner 禹州市和汇超硬材料有限公司
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