掘进机刀具刀箱焊接方法的讨论  

Discussion of Welding Method for the Tool Box of Boring Machine

作　　者：薄航 姜磊峰 陈强 

机构地区：[1]吉林省维尔特隧道装备有限公司,吉林吉林市132011

出　　处：《凿岩机械气动工具》2017年第4期23-25,共3页Rock Drilling Machinery & Pneumatic Tools

摘　　要：掘进机刀具用刀箱为Q345B与42CrMoA异种钢的焊接,通过对两种钢焊接性能的对比分析,制订了合理的焊接工艺。采用手工焊接打底,气体保护焊填充及盖面的组合焊接方式,通过焊前预热、多层多道的焊接及消氢后热处理方法,有效地避免了异种材质焊缝区域的冷、热裂纹等问题,大大提高了产品的性能。The tool box for the TBM was welded using dissimilar steels, Q345B and 43CrMOA. After comparing and analyzing the welding properties of these two steels, a reasonable welding process was developed. A composite welding procedure which includes the manual welding as the backing welding and the gas shielded welding as filler welding and cosmetic welding was employed. Welding preheating, multi-layer and multi-pass welding as well as dehydrogenation treatment effectively eliminated cold and hot cracks in welding area between dissimilar steels, greatly improving the performance ofthe products.

关 键 词：掘进机 刀箱 焊接 裂纹 

分 类 号：TV534[水利工程—水利水电工程]