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本文对九种Fe—C基耐磨合金粉末等离子堆焊铧片进行了模拟田间工况的室内磨损试验和金相组织分析。为探讨其抗磨机理,应用透射电镜观察其形貌、X光波谱仪检测了微区成份,并用X光衍射仪进行了相结构分析。试验结果表明:堆焊合金中具有波形边界的一次六角形或条状碳化物(Cr_7C_3)、且基体为大量马氏体加少量奥氏体的过共晶组织抗磨粒磨损性最佳;同时发现硼元素只存在于组织中的黑孔缺陷处,因此,加硼并不能提高堆焊合金的抗磨性。
In this paper, nine kinds of Fe-C-based wear-resistant alloy powder plasma surfacing tablet simulation field conditions indoor wear test and microstructure analysis. In order to investigate its anti-wear mechanism, the morphology of the anti-wear was observed by transmission electron microscopy. The micro-structure was detected by X-ray spectrometer. The phase structure was analyzed by X-ray diffractometer. The experimental results show that the wear resistance of the hypereutectic microstructure with a large amount of martensite and a small amount of austenite is the best when the matrix is a hexagonal or strip-shaped carbide with corrugated boundary (Cr_7C_3) Found that boron exists only in the organization of black hole defects, therefore, boron does not improve the wear resistance of surfacing alloys.