Microstructure and Abrasive Wear Performance of （Fe,Cr）<sub>7</sub>C<sub>3</sub>/Fe Composite Synthesized by In-situ Reaction

Kang Meng1; Wang Juan2; Ye Fangxia2; Yan Honghua3

doi:10.15980/j.tzzz.2013.01.005

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Microstructure and Abrasive Wear Performance of （Fe,Cr）₇C₃/Fe Composite Synthesized by In-situ Reaction
Vol. 33, Issue 1, Pages: 69-73(2013)
Published： 2013 ，
DOI： 10.15980/j.tzzz.2013.01.005

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[1]康猛,王娟,叶芳霞,闫洪华.原位生成(Fe,Cr)_7C_3/Fe复合材料的组织与磨损性能[J].特种铸造及有色合金,2013,33(01):69-73.

Kang Meng1, Wang Juan2, Ye Fangxia2, et al. Microstructure and Abrasive Wear Performance of （Fe,Cr）₇C₃/Fe Composite Synthesized by In-situ Reaction. [J]. Special Casting & Nonferrous Alloys 33(1):69-73(2013)
[1]康猛,王娟,叶芳霞,闫洪华.原位生成(Fe,Cr)_7C_3/Fe复合材料的组织与磨损性能[J].特种铸造及有色合金,2013,33(01):69-73. DOI： 10.15980/j.tzzz.2013.01.005.

Kang Meng1, Wang Juan2, Ye Fangxia2, et al. Microstructure and Abrasive Wear Performance of （Fe,Cr）₇C₃/Fe Composite Synthesized by In-situ Reaction. [J]. Special Casting & Nonferrous Alloys 33(1):69-73(2013) DOI： 10.15980/j.tzzz.2013.01.005.

摘要

将纯Cr丝与灰铸铁进行复合

使纯Cr丝中的Cr原子与铸铁中的C发生原位反应生成（Fe

Cr）7C3

从而制备出（Fe

Cr）7C3/Fe复合材料。研究了不同反应时间下（Fe

Cr）7C3颗粒增强铁基复合材料的组织及不同Cr含量的复合材料的相对耐磨性。结果表明

复合材料主要由α-Fe、γ-Fe和（Fe

Cr）7C3组成

生成的（Fe

Cr）7C3呈颗粒或短棒状分布于铁基体中;随Cr含量增加

复合材料的相对耐磨性先增加后减小

当Cr含量为20%时

复合材料的耐磨性最好

为铸铁基体的7倍。

Abstract

The （Fe

Cr）7C3 particle-reinforced iron matrix composites were fabricated by compounding gray cast iron with chromium wires based on in situ synthesis

in which the （Fe

Cr）7C3 particles were in-situ synthesized through the reaction between Cr from pure chromium wires and C from the gray cast iron. The microstructure of the composites prepared with different reaction time and relative wear-resistance of the composites prepared with different chromium contents were investigated. The results show that the composites are composed of α-Fe

γ-Fe and （Fe

Cr）7C3

in which the （Fe

Cr）7C3 generated is distributed in iron matrix in form of particles and short-rod. With the increase of chromium content

the relative wear resistance of the composites is increased firstly and then decreased. With the chromium content of about 20%

the composites prepared exhibit excellent wear resistance

which is 7 times higher than that of gray cast iron.