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首页> 外文期刊>Journal of Materials Processing Technology >Microstructure and wear properties of Fe-based hardfacing coating reinforced by TiC particles
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Microstructure and wear properties of Fe-based hardfacing coating reinforced by TiC particles

机译：TiC颗粒增强的铁基硬面涂层的组织和磨损性能

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摘要

In the present study, Fe-based hardfacing coating reinforced by TiC particles was obtained by manual shielded metal arc welding (SMAW) in which H08A bare electrode was coated with fluxes, to which different measures of ferrotitanium, rutile, graphite, calcium carbonate and calcium fluoride had been added. The microstructure and wear properties of the hardfacing coating were studied by means of scanning electron microscopy (SEM), transmission electron microscopy (TEM), an X-ray diffractometer (XRD) and a wear test. The results indicate that TiC particles are produced by direct metallurgical reaction between ferrotitanium and graphite during welding. TiC particles are uniformly dispersed in the matrix of lath martensite and retained austenite with particle sizes in the range 3-5 mu m. Fe-based hardfacing coating reinforced by TiC particles is found to possess better wear resistance and lower coefficient of friction than that of AISI 1045 steel substrate.
机译：在本研究中，通过手动屏蔽金属电弧焊（SMAW）获得了由TiC颗粒增强的铁基硬面涂层，在该焊丝中，H08A裸电极涂有助焊剂，并采用了不同量度的铁钛，金红石，石墨，碳酸钙和钙已添加氟化物。通过扫描电子显微镜（SEM），透射电子显微镜（TEM），X射线衍射仪（XRD）和磨损测试研究了表面硬化涂层的微观结构和磨损性能。结果表明，TiC颗粒是在焊接过程中通过铁钛合金和石墨之间的直接冶金反应生成的。 TiC颗粒均匀地分散在板条马氏体和残余奥氏体的基体中，粒径范围为3-5μm。与AISI 1045钢基材相比，发现由TiC颗粒增强的铁基硬面涂层具有更好的耐磨性和更低的摩擦系数。

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