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Preparation method for particle-reinforced iron-based surface composite material

A technology for surface composite materials and iron-based composite materials, which is applied in the field of preparing iron-based surface composite materials, can solve the problems of difficulty in achieving surface wear resistance, difficulty in achieving surface wear resistance, and increase the cost of raw materials, and achieves good surface quality, uniform thickness distribution, The effect of uniform particle distribution

Active Publication Date: 2017-02-01
ADVANCED MFG TECH CENT CHINA ACAD OF MASCH SCI & TECH +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

These methods mainly increase the wear resistance of the material by increasing the content of alloy elements in the wear-resistant layer, which increases the cost of raw materials; because the wear-resistant layer is linked with the base layer, it is difficult to control the relationship between the two in the subsequent heat treatment process relationship, it is difficult to achieve high wear resistance on the surface and good toughness on the matrix

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] In this implementation example, W and C are used to synthesize WC particles in situ. The selected W powder has a size of 25 µm, and its main component is WC and a small amount of W. 2 C, the addition amount is 40 wt%, the hardness is about 2110HV; the matrix composition is about 1wt% C, about 1.5wt% Cu, and the rest is Fe.

[0020] The preparation method of the WC particle reinforced iron-based composite material of the present embodiment is as follows:

[0021] Mix W powder, pure Fe powder, Cu powder, and C powder with a size of 25 µm, add 8% absolute ethanol, and put them into a ball mill for further mixing. Then dry in a vacuum oven to obtain mixed powder. Put the mixed powder into a graphite mold and put it into a spark plasma sintering device for densification and sintering to obtain a 25vol% WC particle-reinforced iron-based composite material with a density of more than 99.9%. Process the WC particle-reinforced iron-based composite material into the required sh...

Embodiment 2

[0024] This implementation example The size of the WC particles selected in this implementation example is 25 µm, and its main component is WC and a small amount of W 2 C, the addition amount is 40 wt%, the hardness is about 2120HV; the matrix composition is about 1wt% C, about 1.5 wt% Cu, and the rest is Fe.

[0025] The preparation method of the WC particle reinforced iron-based composite material of the present embodiment is as follows:

[0026] Mix WC particles, pure Fe powder, Cu powder, and C powder with a size of 25 µm, add 8% absolute ethanol, and put them into a ball mill for further mixing. Then dry in a vacuum oven to obtain mixed powder. Put the mixed powder into a graphite mold and put it into a spark plasma sintering device for densification and sintering to obtain a 25vol% WC particle-reinforced iron-based composite material with a density of more than 99.9%. Process the WC particle-reinforced iron-based composite material into the desired shape and fix it at ...

example 3

[0029] The size of the WC particles selected in this implementation example is 0-50µm, and its main component is WC and a small amount of W 2 C, the addition amount is 40 wt%, the hardness is about 2130HV; the matrix composition is about 1wt% C, about 1.5 wt% Cu, about 2 wt% Cr, and the rest is Fe.

[0030] The preparation method of the WC particle reinforced iron-based composite material of the present embodiment is as follows:

[0031] Mix WC particles, pure Fe powder, Cu powder, C powder, and Cr powder with a size of 25 μm, add 8% absolute ethanol, and put them into a ball mill for further mixing. Then dry in a vacuum oven to obtain mixed powder. Put the mixed powder into a graphite mold and put it into a spark plasma sintering device for densification and sintering to obtain an 11vol% WC particle-reinforced iron-based composite material with a density of more than 99.9%. Process the WC particle-reinforced iron-based composite material into the desired shape and fix it at...

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Abstract

The invention relates to a method suitable for preparing a particle-reinforced iron-based surface composite material and belongs to the field of metal-based composite materials. The method adopts appropriate ceramic particles, a spark plasma sintering technology, a pouring technology and a heat treatment technology, and the particle-reinforced iron-based surface composite material is obtained. A composite layer and a base material as well as the ceramic particles and a base body are all well combined. The abrasion resistance of the particle-reinforced iron-based surface composite material is improved to a great extent by adding the ceramic particles.

Description

technical field [0001] The invention belongs to the field of metal-based composite materials, and in particular relates to a method suitable for preparing iron-based surface composite materials. Background technique [0002] According to the working conditions of the structural parts, many wear characteristics are formed under the influence of the pressure exerted by the velocity of the friction surface and the properties of the plastic deformation medium produced. And its wear resistance mainly depends on factors such as hardness, material crystal structure and crystal mutual solubility, strength, toughness, and plasticity. Therefore, various parts used in engineering require composite materials to meet the characteristics of high wear resistance on the surface and good plasticity and toughness at the core, which not only fully exerts the excellent wear resistance of the surface of the composite material, but also makes the composite material suffer It is not easy to cause...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C33/02B22F9/04B22F3/105B22D19/08
CPCB22D19/085B22F3/105B22F9/04B22F2009/043C22C33/02
Inventor 张展展陈蕴博张海燕张洋左玲立祁晔思刘晓萍魏毅
Owner ADVANCED MFG TECH CENT CHINA ACAD OF MASCH SCI & TECH
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