Method for manufacturing diamond grinding block with self-spreading high-temperature synthesis

A self-propagating high-temperature, diamond technology, applied in the direction of abrasives, grinding devices, manufacturing tools, etc., can solve the problems of low production efficiency and achieve the effects of high production efficiency, long service life and high bonding strength

Inactive Publication Date: 2009-01-14
KING STRONG MATERIAL ENG LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to overcome the defects of low production efficiency of the above-mentioned prior art, and propose an improved self-propagating high-temperature synthesis method

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0014] The TiCo-based diamond grinding block whose specification is 80 / 100 is prepared, and the specific steps are as follows:

[0015] 1. Select Ti powder with a particle size of 37.5 μm and Co powder with a particle size of 37.5 μm, mix the Ti powder and Co powder in a ball mill at an atomic ratio of 1:1 for 12 hours to obtain a TiCo mixed powder;

[0016] 2. Select the nickel-plated diamond grit with a particle size of 80 / 100, and mix it with the TiCo mixed powder obtained in step 1 according to the ratio of 1:50 in mass ratio in a mixer for 6 hours to obtain a mixture;

[0017] 3. Pressing the mixed material steel mold obtained in step 2 to obtain the cutter head compact;

[0018] 4. Place the blade compact obtained in step 3 in a self-propagating vacuum furnace, and evacuate until the vacuum degree reaches 10 -2 Pa, then heated to 350°C at a heating rate of 5-10°C / min, and continued to keep warm for 10 minutes, then started the tungsten wire ignition device to ignite the...

Embodiment 2

[0021] Preparation specification is the TiNi base diamond grinding block of 100 / 120, and concrete steps are as follows:

[0022] 1. Select Ti powder with a particle size of 37.5 μm and Ni powder with a particle size of 37.5 μm, and mix the Ti powder and Ni powder in a ball mill for 12 hours in an atomic ratio of 1:1 to obtain a TiNi mixed powder;

[0023] 2. Select the nickel-plated diamond sand with a particle size of 100 / 120, and mix the TiNi mixed powder obtained in step 1 according to the ratio of mass ratio 1: 45 in a mixer for 6 hours to obtain the mixture;

[0024] 3. Pressing the mixed material steel mold obtained in step 2 to obtain the cutter head compact;

[0025] 4. Place the blade compact obtained in step 3 in a self-propagating vacuum furnace, and evacuate until the vacuum degree reaches 10 -2 Pa, then heat up to 500°C at a heating rate of 5-10°C / min, and keep warm for 15 minutes, then start the tungsten wire ignition device to ignite the green body, triggering ...

Embodiment 3

[0028] The TiCo-based diamond grinding block whose specification is 120 / 140 is prepared, and the specific steps are as follows:

[0029] 1. Select Ti powder with a particle size of 75 μm and Co powder with a particle size of 75 μm, mix the Ti powder and Co powder in a ball mill at an atomic ratio of 1:1 for 24 hours to obtain a TiCo mixed powder;

[0030] 2. select the nickel-plated diamond whose particle size is 120 / 140 for use, and mix the TiCo mixed powder obtained in step 1 according to the ratio of mass ratio 1: 40 in the mixer for 6 hours to obtain the mixture;

[0031] 3. Pressing the mixed material steel mold obtained in step 2 to obtain the cutter head compact;

[0032] 4. Place the blade compact obtained in step 3 in a self-propagating vacuum furnace, and evacuate until the vacuum degree reaches 10 -2 Pa, then heat up to 300°C at a heating rate of 5-10°C / min, and keep warm for 10 minutes, then start the tungsten wire ignition device to ignite the green body, trigger...

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Abstract

The present invention provides a method for preparing for a diamond abrasive brick with self-propagating high temperature synthesis. The method uses the reaction of titanium and cobalt or titanium and nickel to synthesize an intermetallic compound; heat energy released from TiCo or TiNi intermetallic compound is used for keeping the reaction processing fast to prepare for the diamond abrasive brick with excellent performance. The method comprises a plurality of steps, such as mixing, pressing and shaping, heating and heat preserving, igniting, assembling, and the like, and the method has the advantages that the surface of diamond is reacted with matrix component Ti to generate carbide with high bonding strength during the self-propagating process; the matrix compound is TiCo intermetallic compound and has high intensity, wearing resistance and tarnish resistance; the abrasive brick has long service life; depended on the self-propagating reaction, the method has low energy consumption, short synthesizing time and high production efficiency.

Description

technical field [0001] The invention relates to the preparation technology of powder metallurgy metal-based composite materials, in particular to a method for preparing diamond grinding blocks by self-propagating high-temperature synthesis. Background technique [0002] Traditional magnesite grinding blocks are widely used in the rough and medium grinding of granite slabs, which have disadvantages such as low grinding efficiency, short service life, large consumption, and large environmental pollution. The diamond grinding block has the advantages of high efficiency, fast speed and long life. The traditional diamond grinding block is made of metal powder and diamond single crystal, which are sintered and compacted by high temperature hot pressing. For example, Chinese patent 94114204.3 discloses a diamond grinding block and a sintering method, which is to mix diamond particles with a certain amount of cobalt, copper, nickel, iron, tin, chromium, zinc and other metal powders...

Claims

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Application Information

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IPC IPC(8): B24D18/00B24D3/10
Inventor 王刚罗骥王振明郭志猛赵文东
Owner KING STRONG MATERIAL ENG LTD
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