文档介绍：TB 中华人民共和国铁道行业标准 TB/T - 200X 工务作业第 21 部分钢轨焊缝超声波探伤作业 Maintenance Performance Part 21: Ultrasonic Testing of Rail W eld s (送审稿) 200X-XX-XX 发布 200X-XX-XX 实施中华人民共和国铁道部发布 ICS S 17 TB/ — 200X I 目次前言............................................................................................................................................................ II 1. 范围................................................................................................................................................................ 1 2. 规范性引用文件............................................................................................................................................ 1 3. 工艺要求........................................................................................................................................................ 1 4. 探伤操作........................................................................................................................................................ 3 5. 缺陷判定........................................................................................................................................................ 6 6. 探伤报告........................................................................................................................................................ 7 附录 A (规范性附录) GHT 型钢轨焊缝超声波探伤对比试块..................................................................... 7 附录 B (资料性附录) 测距校准方法.......................................................................................................... 10 附录 C (资料性附录) 距离波幅曲线制作和使用...................................................................................... 11 附录 D (资料性附录) 缺陷相对 3dB 延伸度测定...................................................................................... 14 附录 E (资料性附录) 仪器和探头性能测试方法...................................................................................... 15 附录 F (资料性附录) 焊缝探伤备品表...........................................................