机械

高铁钢轨的生产关键装备BD1轧辊易因磨损和疲劳损伤影响轧制效率与成本控制。对此，本文采用自研设计的YD551埋弧焊药芯焊丝匹配SJ601焊剂，对攀钢60 kg/m钢轨用BD1轧辊实施了堆焊修复（或制造）。堆焊修复辊的工作层金属有优异的耐磨性与热疲劳性能，且高温硬度与强度保持性良好，解决了原用辊存在的热疲劳性能差、耐磨性差、红硬性差等问题。采用堆焊方法修复（或制造）的复合轧辊，不但修复（制造）成本低，而且能提高轧辊使用寿命，降低轧辊耗量，合理使用及节约合金元素，并能够提高轧机的作业率和产品的质量，是一种有效的技术经济措施。其经上机使用，轧制量由原来的不足7 150吨/次提升至38 000～42 000吨/次。该技术的成功应用为钢铁企业关键备件管理提供了可复制、可推广的解决方案。

The production of high-speed rail tracks relies on key equipment such as the BD1 roll, which is susceptible to wear and fatigue damage, affecting rolling efficiency and cost control. To address this, this paper employs a self-developed YD551 flux-cored wire matched with SJ601 flux to perform surfacing repair(or manufacturing) on BD1 rolls used for 60 kg/m rails at Panzhihua Steel. The working layer metal of the repaired rolls exhibits excellent wear resistance and thermal fatigue performance, along with good high-temperature hardness and strength retention, resolving issues such as poor thermal fatigue performance, inadequate wear resistance, and low red hardness of the original rolls. The surfacing repair(or manufacturing) of composite rolls not only reduces repair(manufacturing) costs but also extends roll lifespan, lowers roll consumption, ensures rational use and saves alloy elements, while improving rolling mill operational rates and product quality. This is an effective technical and economic measure. In practice, the rolling volume has increased from less than 7,150tons per pass to 38,000-42,000 tons per pass. The successful application of this technology provides replicable and scalable solutions for key spare parts management in steel enterprises.