细长喷水管道的堆焊工艺及变形控制

为了提高UM56.4原料立磨设备的耐磨性，延长设备的使用寿命，对立磨喷水管道的管套外侧进行了耐磨层堆焊。通过对不同焊接材料及焊接工艺进行的焊接试验，优化出合理的焊接材料及工艺参数，并自行设计了焊接变形控制工装，制定合理的焊接工艺措施，如焊接顺序、焊后均匀冷却等，最终保证了堆焊层硬度53～59 HRC、无裂纹，且堆焊后焊接变形量单边小于1.5 mm的技术要求。检测结果表明，对总长2 400 mm，规格为Φ89 mm×7.5 mm的细、长、薄壁立磨喷水管道的堆焊及变形控制达到了设计要求。

Surfacing Welding Process and Deformation Control of Elongated Spary Pipe

In order to improve the abrasion resistance of UM56.4 raw material grinding equipment, prolong the service life of the equipment, the wear-resistant layer surfacing welding was conducted on the outer side of the vertical mill water pipe. Through welding experiments based on the different welding material and welding process, optimized the reasonable welding material and process parameters, and designed the welding deformation control tooling, made reasonable welding process measures, such as welding sequence, uniform cooling after welding etc., ultimately to ensure the technical requirement, namely the hardness of surfacing welding layer 53~59 HRC, no crack, and welding deformation after welding of unilateral were less than 1.5 mm. Test results showed that the surfacing welding and deformation control of total length of 2 400 mm, Φ89 mm×7.5 mm thin, long, thin wall thickness vertical mill water pipe meet the design requirements.