盾构机滚刀刀具用钢研究现状及进展

摘要：随着国家不断推进现代化进程，大量基础设施建设工程需要使用盾构机来构建隧道，而盾构机最重要的零件之一是盾构刀具，刀具质量的好坏是盾构机工作效率直接影响因素。简要介绍了盾构机滚刀刀具用钢的应用情况及研究现状，重点综述了AISI 4340钢、H13钢、SKD11钢3种合金钢的成分设计，热加工工艺以及一些改性技术的应用，显微组织特征与力学性能等方面的研究进展，指出现在主要滚刀用钢在高强度情况下存在韧性不足、制造成本高等缺点。并表明可以通过添加Ce、Gd、Y等稀土元素，或者经过临界退火使材料具有双相组织，采用离子渗氮等手段来提高盾构机滚刀用钢的性能和使用寿命。

Status and prospect of steels for disc cutter ring in shield machine

With the acceleration of developing modernization, a large number of infrastructure projects need to build tunnels by shield machine, and the most important part of shield machine is shield cutting tool, the quality of cutting tool is directly related to working efficiency of shield machine. The application and development of shield machine hob steels were introduced, the material composition design, hot working processes, modification technology applications, microstructure characteristics and mechanical properties research progresses of AISI 4340, H13, SKD11 steel were mainly reviewed, then it was pointed out that the deficiency of hob steels now is poor toughness and high cost. It indicates that obtaining dual phase microstructure after intercritical annealing, adding rare earth elements like Ce, Gd, Y or ion nitriding can improve the property and service life of disc cutter ring.