Abstract: The disc cutter is the key component of the shield machine， and it is also the most easily worn and failed component in the tunneling construction process. The wear of the disc cutter ring is mainly composed of three types of abrasive wear， adhesive wear and fatigue wear， among which abrasive wear and adhesive wear are the main wear mechanisms. In the process of rock breaking， strong extrusion and high impact make the cutter ring often wear， eccentric wear， blade， fracture， blade collapse， shedding and other failures. The cost of cutter ring loss accounts for 5%-10% of the total project， and the maintenance and replacement of cutters caused by the cutter ring failure greatly reduce the engineering construction efficiency. At present， the commonly available materials for cutter rings are DC53 and H13 steels， and their wear resistance and impact toughness depend on the type， morphology， size， quantity， distribution and matrix structure characteristics of carbides in those steels. In order to inprove the performance of the disc cutter ring， domestic and foreign scholars have carried out a series of studies on the optimization of alloy design for the cutter ring， the one-time forming preparation of the cutter ring， the induction heat treatment preparation of the gradient performance cutter ring， and the development of the bimetallic composite cutter ring， which provides a strong support for the performance enhancement of the cutter ring.

Key words: Shield Cutter Ring, Wear Failure, Carbide, Component Optimization, Composite Cutter Ring

摘要： 盘形滚刀是盾构机的核心部件，也是掘进施工过程最易磨损和失效的部件。滚刀刀圈的磨损主要由磨粒磨损、黏着磨损和疲劳磨损三种机制共同组成，其中磨粒磨损和黏着磨损占主要。破岩过程中，强挤压、高冲击作用使得刀圈常发生磨损、偏磨、卷刃、断裂、崩刃、脱落等失效，刀圈损耗成本占总工程的5%~10%，而刀圈失效引起的维护、检修、更换刀具等又大幅降低了工程施工效率。当前常用的刀圈材料为DC53、H13钢，其耐磨性、抗冲击韧性取决于钢中碳化物类型、形貌、尺寸、数量、分布和基体组织特征。为实现滚刀刀圈性能强化提升，国内外学者围绕刀圈材料成分优化设计、刀圈一次成形制备、感应热处理制备梯度性能刀圈、双金属复合刀圈研制等开展了系列研究，为滚刀刀圈性能强化提供了有力支撑。

关键词: 盾构刀圈, 磨损失效, 碳化物, 成分优化, 复合刀圈