Ceramic particle reinforced Fe-based composite material and method for preparing the same

A technology of iron-based composite materials and ceramic particles, which is applied in the field of wear-resistant metal-based composite materials, can solve the problems of reducing the compactness of composite materials, and the wear resistance performance is not suitable for preparation, so as to achieve the effect of improving wear resistance

Active Publication Date: 2010-07-28
韶关韶瑞铸钢有限公司
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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 provide a method for preparing a ceramic particle reinforced iron-based composite material with no residual impurities in the binder, a thicker ceramic composite layer, and good wear resistance, which overcomes the existing problems of the prior art and reduces the wear resistance of the composite material. Density, wear resistance and defects that are not suitable for preparing thicker and larger wear parts

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0012] Embodiment 1: the cermet (WC-Co, wherein the volume percentage of Co is 8%) particles with a particle size of 5mm is placed in the mold, the thickness of the cermet particles in the mold is 15mm, and the mold can be a sand mold or a metal mold, The high chromium cast iron liquid containing 26% Cr was poured into the mold, and after static solidification and cooling, the ceramic particle reinforced high chromium cast iron matrix composite material was prepared. The area percentage of the ceramic particles on the working surface of the composite material is 38%, the hardness of the ceramic particles is ≥66HRC, and the thickness of the composite layer containing the ceramic particles is 15mm.

Embodiment 2

[0013] Embodiment 2: the cermet (WC-Co, wherein the volume percentage of Co is 5%) particles with a particle size of 1mm is placed in the mold, the thickness of the cermet particles in the mold is 1mm, and the mold can be a sand mold or a metal mold, The nodular cast iron liquid is poured into the mold, and the ceramic particle reinforced nodular cast iron matrix composite material is prepared after static solidification and cooling. The area percentage of ceramic particles on the working surface of the composite material is 45%, the hardness of the ceramic particles is ≥66HRC, and the thickness of the composite layer containing ceramic particles is 1mm.

Embodiment 3

[0014] Embodiment 3: the cermet (WC-Co, wherein the volume percentage of Co is 8%) particles with a particle size of 3mm is placed in the mold, the thickness of the cermet particles in the mold is 5mm, and the mold can be a sand mold or a metal mold, The gray cast iron matrix composite material reinforced by ceramic particles is prepared by pouring molten gray cast iron into the mold, statically solidifying and cooling. The area percentage of ceramic particles on the working surface of the composite material is 41%, the hardness of the ceramic particles is ≥66HRC, and the thickness of the composite layer containing ceramic particles is 5mm.

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PUM

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Abstract

The invention relates to a preparation method of a ceramic grain reinforced iron-based composite material. The invention is characterized in that: (1) the metal ceramic grains with the granularity ranging from 1 mm to 7 mm are placed in a casting chamber; (2) the steel liquid or casting liquid is poured into the casting model for static concreting and cooling, and the ceramic grain reinforced iron-based composite material is prepared, with the area percentage of the working surface ceramic grain ranging from 15 percent to 45 percent, hardness of the ceramic grains not less than 66HRC and the composite layer thickness of the ceramic grains ranging from 1 mm to 15 mm. The anti-wear performance of the prepared composite material is more than 5 times that of the base material, and the invention is suitable for preparing thick and large anti-wear composite casts.

Description

technical field [0001] The invention relates to a wear-resistant metal-based composite material, in particular to a ceramic particle-reinforced iron-based composite material and a preparation method thereof. Background technique [0002] At present, in the friction and wear and abrasive wear conditions of metallurgy, electric power, building materials, construction, chemical industry, machinery and other industries, most of the wear-resistant materials used to replace wear-resistant cast iron and wear-resistant steel (hardness 50HRC-65HRC) are cast infiltration methods. Prepared ceramics (WC, Al 2 o 3 、Cr 2 o 3 , SiC, etc.) particle reinforced iron-based composite materials (hardness ≥ 60HRC). The casting and infiltration method is used to prepare composite materials, the process is relatively simple, and the production is easy to operate and implement. The disadvantage of composite materials prepared by casting infiltration method is that the ceramics (WC or Al 2 o 3...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B22D19/16
Inventor 李卫伍国仪袁军平刘英曾绍连
Owner 韶关韶瑞铸钢有限公司
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