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Iron-based binding agent diamond tool and preparation method thereof

A diamond tool and iron-based binder technology, which is applied in the field of iron-based binder diamond tools and its preparation, can solve the problems of insufficient sintering performance and mechanical properties, affecting the formation of diamond tools, and high iron sintering temperature, so as to shorten the sintering time, Effects of improving sintering performance and improving microstructure

Active Publication Date: 2018-03-27
GUANGDONG UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although the iron-based bond diamond tool is an environmentally friendly diamond tool, there are still many factors that limit its application in metal bond tools.
On the one hand, iron has a good affinity for diamond, and it is easy to corrode diamond during the sintering reaction, which affects the forming of diamond tools. On the other hand, the sintering temperature of iron is high, and it is easy to oxidize, which leads to insufficient sintering performance and mechanical properties.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0031] A preparation method of an iron-based bond diamond tool, comprising the following steps:

[0032] 1) Fe 2 o 3 Powder and Al powder are mixed in a ball mill to obtain Fe 2 o 3 - Al mixed powder;

[0033] 2) Fe 2 o 3 -Al mixed powder, Fe-Si pre-alloyed powder, TiH 2 Powder, Fe powder, B powder, Si powder and diamond abrasive are mixed in a ball mill to obtain a diamond tool preparation material;

[0034] 3) cold pressing the diamond tool preparation material to obtain a diamond tool blank;

[0035] 4) Sintering the diamond tool body to obtain the above-mentioned iron-based bond diamond tool.

[0036] Preferably, in step 1) or step 2), the speed of the ball mill is 150-250r / min, the ball milling time is 3-5h, and the ball-to-material ratio is (5-15): 1; more preferably, step 1) or step 2), the ball-to-material ratio of the ball mill is (5-8):1.

[0037] Further, in step 1) or step 2), the total volume of the balls and the materials does not exceed 2 / 3 of the volu...

Embodiment 1

[0045] A preparation method for an iron-based bond abrasive, comprising the steps of:

[0046] Fe that the mass fraction ratio is 2.2:1 2 o 3 Al powder and Al powder were put into a ball mill and mixed thoroughly, the speed of the ball mill was 150r / min, the ball milling time was 3h, the ball-to-material ratio was 5:1, and Fe 2 o 3 -Al mixed powder, its mass fraction is 80 parts altogether, wherein Fe 2 o 3 The particle size of the powder is 10 μm, the particle size of the Al powder is 20 μm; the mass fraction of the Fe-Si pre-alloyed powder is 16 parts, and its particle size is 10 μm; the mass fraction of the Fe powder is 1 part, and its particle size is 15 μm ; The mass fraction of Si powder is 1 part, and its particle size is 3 μm; the mass fraction of B powder is 1 part, and its particle size is 3 μm; TiH 2 The mass part of the powder is 1 part, and its particle diameter is 10 μm. Then mix and add diamond abrasives so that the diamond abrasives account for 25% of the...

Embodiment 2

[0048] A preparation method for an iron-based bond abrasive, comprising the steps of:

[0049] Fe that the mass fraction ratio is 2.2:1 2 o 3 Al powder and Al powder were put into a ball mill and mixed thoroughly, the speed of the ball mill was 150r / min, the ball milling time was 3h, the ball-to-material ratio was 5:1, and Fe 2 o 3 -Al mixed powder, its mass fraction is 85 parts altogether, wherein Fe 2 o 3 The particle size of the powder is 5 μm, the particle size of the Al powder is 15 μm; the mass fraction of the Fe-Si pre-alloyed powder is 12.5 parts, and its particle size is 15 μm; the mass fraction of the Fe powder is 0.5 parts, and its particle size is 5 μm ; The mass fraction of Si powder is 0.5 parts, and its particle diameter is 5 μ m; The mass fraction of B powder is 0.5 parts, and its particle diameter is 2 μ m; TiH 2 The mass part of the powder is 1 part, and its particle diameter is 5 μm. Then mix and add diamond abrasives so that the diamond abrasives acco...

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Abstract

The invention discloses an iron-based binding agent diamond tool and a preparation method thereof. The iron-based binding agent diamond tool comprises a binding agent and an abrasive material. The binding agent is prepared from the following components in parts by mass: 70-90 parts of Fe2O3-Al mixed powder, 5-25 parts of Fe-Si pre-alloy powder, 0.5-3 parts of TiH2 powder, 0.5-5 parts of Fe powder,0.5-1 part of B powder and 0.5-3 parts of Si powder; the abrasive material which is diamonds accounts for 5-25% by volume of a grinding working layer. Meanwhile, the invention also discloses the preparation method of the iron-based binding agent diamond tool. The iron-based binding agent diamond tool is prepared by using ferric oxide and aluminum and adding other binding agents with the diamond abrasive material. A certain energy is provided to sinter the binding agent by means of a high heat release enthalpy of reaction in-situ of Fe2O3-Al, so that the sintering time is shortened, the erosion effect of Fe on the diamonds is reduced, and meanwhile, a strengthened phase is generated in situ, so that the mechanical properties of the binding agent are improved.

Description

technical field [0001] The invention relates to an iron-based binder diamond tool and a preparation method thereof. Background technique [0002] Diamond tools are the main tools for processing hard and brittle materials such as engineering ceramic materials, crystal materials, semiconductor materials, cemented carbide and composite materials. At present, in the field of high-precision grinding, metal bonded diamond abrasive tools are mainly used in China. The metal bonds used in the manufacturing process mainly include: copper-based, cobalt-based, iron-based, nickel-based, tungsten-based and aluminum-based bonds, etc. . Among them, copper-based, cobalt-based and iron-based binders are widely used. The alloy powder contains Cr, Ti, Mn, V, Pb and other elements, so there are many types and high content of heavy metals in the metal binder. Different types of heavy metals will cause certain pollution to the environment in the manufacturing and application of diamond tools. ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B22F1/00C22C26/00C22C1/05
Inventor 张凤林陈家泓刘伟尹自强王素娟
Owner GUANGDONG UNIV OF TECH