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本文对Mo-B,Mn-Si,Cr-Ma-Si-B,Cr-Ma-V-B,Cr-Mo-Ni-B,Cr-Mo-V-BCr-Si-B等九种Fe-C基耐磨合金粉末等离子堆焊的铧片进行了室内磨损试验及金相组织分析,应用透射电镜观察其形貌、x光波谱仪检测了微区成分,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料磨损性最佳;同时发现硼元素只存在于黑孔缺陷处,因此,加硼并不能提高堆焊合金的抗磨性。
In this paper, nine Fe-C groups such as Mo-B, Mn-Si, Cr-Ma-Si-B, Cr-Ma-VB, Cr-Mo-Ni-B and Cr-Mo-V-BCr-Si-B Wear-resistant alloy powder plasma surfacing of the tablet for wear test and microstructure analysis of the microstructure, morphology was observed by transmission electron microscopy, X-ray spectrometer to detect the composition of the micro-area, and the use of x-ray diffraction instrument for the phase structure analysis. 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) Boron element exists only in the black hole defects, therefore, boron does not improve the wear resistance of surfacing alloy.