Composite powder particles (CPP) preset on base metals were fused with a solid wire to form a melt by the intense heat provided by the arc. An X-ray diffractometer, scanning electron microscopy, and energy dispersive spectrometer were employed to investigate the effects of travel speed on the microstructure and abrasion resistance. It was found that the microstructure of hardfacing alloys with CPP consists of γ-Fe, M₇C₃, and (Ti, V) C. With an increase in the travel speed from 3.5 to 6 mm/s, the microstructure with CPP changed from a hypoeutectic to hypereutectic structure. For hardfacing alloys with CPP, the increase in the travel speed not only contributed to a reduction of the dilution ratio of base metals, but also deliberately increased the volume fraction of primary M₇C₃-type carbides, which indicated that the bonding function executed on powder components led to a significant improvement in abrasion resistance and increased the utilization ratio of the alloying elements. The wear mechanism of hardfacing alloys included micro-cutting of abrasive particles and micro-spalling.

中文翻译：

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行进速度对复合粉末颗粒与实心丝沉积堆焊合金显微组织和耐磨性的影响

预设在贱金属上的复合粉末颗粒（CPP）与实心丝熔合，通过电弧提供的强烈热量形成熔体。用X射线衍射仪，扫描电子显微镜和能量色散光谱仪研究行进速度对显微组织和耐磨性的影响。结果发现，含CPP的堆焊合金的显微组织由γ-Fe，M ₇ C ₃和（Ti，V）C组成。随着行进速度从3.5 mm / s增加到6 mm / s，含CPP的显微组织发生了变化。从亚共晶到过共晶结构。对于带有CPP的堆焊合金，行进速度的提高不仅有助于降低贱金属的稀释比，而且有意增加了初级M的体积分数₇ C ₃型碳化物，表明在粉末成分上执行的键合功能显着提高了耐磨性并提高了合金元素的利用率。堆焊合金的磨损机制包括磨料颗粒的微切割和微剥落。