A kind of iron-aluminum bond diamond tool and preparation method thereof

A technology of diamond tools and bonding agent, which is applied in the direction of manufacturing tools and other manufacturing equipment/tools, etc., can solve problems such as insufficient sintering performance and mechanical properties, reduced strength of diamond, and limited applications, etc., to achieve excellent corrosion resistance and oxidation resistance. Effect of improving brittleness and improving bonding performance

Active Publication Date: 2019-10-25
GUANGDONG UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Although iron-based binder is an ideal metal bond, many factors limit its application in metal bond diamond tools
On the one hand, during the sintering process, diamond is easy to react with iron and is corroded to reduce its strength; on the other hand, iron is easy to oxidize, resulting in insufficient sintering performance and mechanical properties.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0034] A preparation method of an iron-aluminum bond diamond tool, comprising the following steps:

[0035] 1) Mix Fe powder and Al powder in a ball mill to obtain Fe-Al mixed powder;

[0036] 2) Fe-Al mixed powder, Si-Fe alloy powder, Si powder, B powder, TiH 2 Powder and diamond abrasive are mixed in a ball mill to obtain diamond tool preparation materials;

[0037] 3) cold pressing the diamond tool preparation material to obtain a diamond tool blank;

[0038] 4) Sintering the diamond tool blank to obtain the above-mentioned iron-aluminum bond diamond tool.

[0039] Preferably, in step 1) or step 2), the rotational speed of the ball mill is 150-250r / min, the ball milling time is 3-5h, and the ball-to-material ratio is (5-10):1.

[0040] Further, in step 1) or step 2), the total volume of the balls and the materials does not exceed 2 / 3 of the volume of the ball mill jar.

[0041] Preferably, in step 3), the compacted density of the diamond tool body is 50-70% of theoretic...

Embodiment 1

[0048]Mix Fe powder and Al powder with a mass-to-number ratio of 6.2:1 evenly in a ball mill. The speed of the ball mill is 200r / min, the ball milling time is 3h, and the ball-to-material ratio is 5:1. Prepare Fe-Al mixed powder by ball milling , the mass parts are 88 parts in total, wherein the particle size of Fe powder is 20 μm, the particle size of Al powder is 20 μm; the mass parts of Si-Fe alloy powder is 10 parts, and its particle size is 20 μm; the mass of Si powder The number of parts is 1 part, and its particle size is 10 μm; the mass part of B powder is 0.5 parts, and its particle size is 5 μm; TiH 2 The mass fraction of the powder is 0.5 parts, and its particle diameter is 10 μm. Then add diamond abrasives to make it account for 25% of the volume of the grinding working layer, and the mesh number is 50 / 60 mesh. Put the binder and abrasive in the above ratio into a ball mill and mix thoroughly. The speed of the ball mill is 150r / min, the ball milling time is 3h, an...

Embodiment 2

[0050] Mix Fe powder and Al powder with a mass-to-number ratio of 6.2:1 evenly in a ball mill. The speed of the ball mill is 200r / min, the ball milling time is 3h, and the ball-to-material ratio is 5:1. Prepare Fe-Al mixed powder by ball milling , the mass parts are 82 parts in total, wherein the particle size of Fe powder is 10 μm, the particle size of Al powder is 10 μm; the mass parts of Si-Fe alloy powder is 14.5 parts, and its particle size is 10 μm; the mass of Si powder The number of parts is 2 parts, and its particle size is 5 μm; the mass fraction of B powder is 0.5 parts, and its particle size is 10 μm; TiH 2 The mass part of the powder is 1 part, and its particle diameter is 5 μm. Then add diamond abrasives to make it account for 18.75% of the volume of the grinding working layer, and the mesh number is 40 / 50 mesh. Put the binder and abrasive in the above ratio into a ball mill and mix thoroughly. The speed of the ball mill is 200r / min, the ball milling time is 5h,...

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Abstract

The invention discloses an iron-aluminum bonding agent diamond tool and a preparation method thereof. The iron-aluminum bonding agent diamond tool comprises a bonding agent and an abrasive, wherein the bonding agent comprises, by mass, 60-90 parts of Fe-Al mixed powder, 5-40 parts of Si-Fe alloy powder, 0.5-3 parts of Si powder, 0.5-1 part of B powder and 0.5-3 parts of TiH2 powder, the abrasive is diamond, and the diamond abrasive accounts for 5-25% of the size of the grinding working layer. Meanwhile, the invention also discloses the preparation method of the iron-aluminum bonding agent diamond tool. According to the iron-aluminum bonding agent diamond tool, an aluminum-based bonding agent is added to an iron-based bonding agent, so that an iron-aluminum bonding agent Fe3Al is formed, and the iron-aluminum bonding agent Fe3Al has excellent oxidation resistance and corrosion resistance and an excellent mechanical property, can save the manufacturing cost and can improve reaction efficiency; and meanwhile, the sintering performance and the mechanical property of the diamond tool can be improved by utilizing the bonding agent system obtained by combining multiple additives.

Description

technical field [0001] The invention relates to an iron-aluminum bonded diamond tool and a preparation method thereof. Background technique [0002] Metal bonded diamond tools are widely used in cutting, drilling and forming of stone, building ceramics, glass, concrete and asphalt pavement. At present, metal-bonded diamond tools are mainly obtained by hot-pressing sintering methods of copper-based, cobalt-based, iron-based binders and diamond abrasives. The content of heavy metals such as copper, cobalt, tin, zinc, and lead in the binder is relatively high. On the one hand, the price of these metal powder raw materials is relatively high. Secondly, these heavy metals will cause certain heavy metal pollution to the environment during the manufacturing and application process. Therefore, from From the perspective of cost saving and environmental protection, there is an urgent need to research and develop low-cost and environmentally friendly metal bond diamond tools and their...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B22F5/00C22C33/02C22C38/02C22C38/06C22C38/14
CPCB22F5/00B22F2005/001B22F2005/002B22F2998/10C22C33/0207C22C33/0278C22C38/002C22C38/02C22C38/06C22C38/14B22F2009/043B22F3/02B22F3/10
Inventor 张凤林刘伟陈家泓尹自强王素娟
Owner GUANGDONG UNIV OF TECH
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