ICS27.100 CCSF23 中华人民共和国电力行业标准 DL/T903—2025 代替DL/T903—2015 磨煤机耐磨件堆焊技术导则 Technicalguideforoverlayingwearresistantpartsofcoalpulverizer 2025-09-28发布 2026-03-28实施 国家能源局发布DL/T903—2025 I目次 前言.......................................................................................................................................................................II 1范围.....................................................................................................................................................................3 2规范性引用文件.................................................................................................................................................3 3术语和定义.........................................................................................................................................................4 4一般要求.............................................................................................................................................................4 4.1堆焊方法及堆焊方式.................................................................................................................................4 4.2堆焊工作人员.............................................................................................................................................5 4.3堆焊材料.....................................................................................................................................................5 4.4焊机及辅助设备.........................................................................................................................................6 4.5堆焊工艺评定与工艺规程.........................................................................................................................7 4.6安全和环境的要求.....................................................................................................................................7 5堆焊前的准备.....................................................................................................................................................7 5.1堆焊前的检测.............................................................................................................................................7 5.2堆焊再制造前的评估.................................................................................................................................7 6堆焊.....................................................................................................................................................................7 6.1焊前预处理.................................................................................................................................................8 6.2焊前预热.....................................................................................................................................................8 6.3堆焊工艺.....................................................................................................................................................8 7质量检验.............................................................................................................................................................9 7.1检验项目.....................................................................................................................................................9 7.2外观及尺寸检验.........................................................................................................................................9 7.3显微组织.....................................................................................................................................................9 7.4硬度检验.....................................................................................................................................................9 7.5无损检测...................................................................................................................................................10 7.6化学成分分析..............................................................