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应用药芯焊丝对发动机曲轴磨损进行修复,论述了药芯焊丝堆焊工艺及药芯焊丝化学成分。试验表明,超微颗粒SiC/纳米WC促进了堆焊层中原位反应,形成了弥散强化、固溶强化等多机制强化效应;SiC与金属基体之间不是仅仅机械结合,部分区域是以化学键方式结合,实现了结构上的连续性,修复的曲轴表面耐磨性相对于原件表面耐磨性提高了24%。
Application of flux cored wire to repair the crankshaft wear of the engine, discusses the flux cored welding process and flux cored wire chemical composition. The experimental results show that the ultrafine SiC / nano-WC promoted the in-situ reaction in the overlay and formed multi-mechanism strengthening effect such as dispersion strengthening and solid solution strengthening. The mechanical bonding between SiC and the metal matrix was not only mechanical bonding, Combined to achieve structural continuity, repair of the crankshaft surface wear relative to the original surface wear resistance increased by 24%.