Effect of molybdenum on the microstructure and wear resistance of Fe-based hardfacing coatings
Effect of molybdenum on the microstructure and wear resistance of Fe-based hardfacing coatings
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DOI：
10.1016/j.msea.2007.12.020
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发表时间：
2008-08
期刊：
影响因子：
6.4
通讯作者：
X. H. Wang;Fudong Han;X. M. Liu;S. Qu;Z. Zou
中科院分区：
文献类型：
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作者：
X. H. Wang;Fudong Han;X. M. Liu;S. Qu;Z. Zou
采用手工电弧焊(SMAW)工艺在AISI1020钢表面制备了含钼铁基堆焊合金。采用X射线衍射仪、光学显微镜、扫描电子显微镜、电子探针分析和磨损试验等手段，研究了Mo对铁基堆焊合金组织和耐磨性的影响。结果表明，板条马氏体基体内生成了立方和棒状复合碳化物。随着Mo含量的增加，堆焊层中碳化物的含量增加。当Fe-Mo含量控制在3~4wt.%范围内时，堆焊层具有良好的抗裂性和耐磨性。堆焊层硬度和耐磨性的提高归功于Mo2C碳化物的形成和Mo的固溶强化。
Fe-based hardfacing alloys containing molybdenum compound have been deposited on AISI 1020 steel substrates by shield manual arc welding (SMAW) process. The effect of Mo on the microstructure and wear resistance of the Fe-based hardfacing alloys were investigated by means of X-ray diffraction, optical microscopy, scanning electron microscopy (SEM) and electron probe microanalysis, as well as wear test. The results indicated that cuboidal and rod-type complex carbides were synthesized in the lath martensite matrix. The fraction of carbides in hardfacing layer increased with an increasing of Mo content. The hardfacing layer with good cracking resistance and wear resistance could be obtained when the amounts of Fe–Mo was controlled within a range of 3–4wt.%. The improvement of hardness and wear resistance of the hardfacing layers attributed to the formation of Mo2C carbide and the solution strengthening of Mo.