Effect of Si on microstructures and oxidation resistance of FeMoCrNi high temperature wear-resistance alloys

被引：0

作者：

Li, Jie-Fei ^{[1
,2
]}

Yin, Fu-Cheng ^{[1
,2
]}

Liu, Yong-Xiong ^{[1
,2
]}

Ouyang, Xue-Mei ^{[1
,2
]}

Li, Zhi ^{[1
,2
]}

Zhao, Man-Xiu ^{[1
,2
]}

机构：

[1] School of Materials Science and Engineering, Xiangtan University, Xiangtan,411105, China

[2] Key Laboratory of Materials Design and Preparation Technology of Hunan Province, Xiangtan University, Xiangtan,411105, China

来源：

Zhongguo Youse Jinshu Xuebao/Chinese Journal of Nonferrous Metals | 2015年 / 25卷 / 11期

关键词：

Silicon - Microstructure - Reaction intermediates - Wear resistance - Binary alloys - Iron alloys - Molybdenum oxide - Chromium alloys - Molybdenum alloys - Oxidation - Cobalt alloys - Oxidation resistance - X ray diffraction analysis;

D O I：

暂无

中图分类号：

学科分类号：

摘要：

The effects of Si on the microstructures of FeMo25Cr14Ni10 high temperature wear-resistance alloys and its oxidation behaviors at 800 ℃ were investigated by scanning electron microscopy (SEM) and X ray diffractometry. The results show that the microstructures of as-cast alloys and annealed alloys are α-Fe (Mo, Cr, Ni) + Laves phase (Fe2Mo type). With the increase of Si content, the as-cast microstructure of alloy changes from Widmanstatten into dendrite. The addition of Si obviously improves the oxidation resistance of the alloys. The action mechanism of Si is that Si can increase the content of Cr in the matrix and promote the formation of dense Cr2O3 film, while the accumulation of Mo and Si in Laves phase increases the stability of the intermediate phase and inhibit oxidation and volatilization of Mo oxides. While when Si content is lower, the volatilization of Mo oxide with low melting point can not be inhibited completely, the outer film is loose, resulting in the spalling of the oxidation film. FeMo25Cr14Ni10 with 3%-4% Si (mass fraction) have excellent oxidation resistance. © 2015, Central South University of Technology. All right reserved.

引用

页码：3084 / 3091