盾构滚刀刀圈材料的冲滑复合磨损性能研究

盾构滚刀的磨损极大影响了隧道工程的掘进效率，滚刀主要发生冲击-滑动(冲滑)复合磨损，而刀盘与地层之间的相对刚度对滚刀的磨损行为存在显著影响，因此本文中在自主研制冲滑复合摩擦磨损试验机上对滚刀刀圈材料H13钢进行不同结构刚度下的磨损试验，并采用光学显微镜、扫描电镜和白光干涉仪等微观分析设备对不同结构刚度下H13钢的冲滑复合磨损特性和机理进行了分析和揭示. 结果表明：随着结构刚度的增大，压载荷作用时间增长并逐渐起主导作用，摩擦副在滑动区接触时间增长，H13钢损伤最严重区域有沿着冲滑方向移动的趋势，相应地，磨损机制由磨粒磨损变为磨粒磨损与黏着磨损混合形式. 在本研究中再现了盾构滚刀冲滑复合磨损的界面微观工作状态，深入探究了滚刀刀圈材料的微观磨损机理，可辅助了解滚刀与不同软硬程度地层间的相互作用，并为滚刀刀圈材料的磨损性能评价提供了新的研究方法和手段.

The wear of shield tunnel boring machine (TBM) disc cutters significantly affects the excavation efficiency of tunnel engineering. Disc cutters primarily suffer from impact-sliding (impulse-sliding) combined wear, and the relative stiffness between the cutterhead and the formation has a notable influence on the wear behavior of the cutters. Accordingly, this study conducted wear tests on H13 steel, the material of the cutter rings of disc cutters, under various structural stiffness conditions using a self-developed impact-sliding combined friction and wear testing machine. Microscopic analysis instruments including optical microscopes, scanning electron microscopes (SEM), and white light interferometers were employed to analyze and elucidate the impact-sliding combined wear characteristics and mechanisms of H13 steel under different structural stiffness conditions. The results reveal that as the structural stiffness increases, the acting duration of compressive load becomes longer and gradually dominates, while the contact time of the friction pair in the sliding zone extends. The most severely damaged region of H13 steel tends to shift along the impact-sliding direction, and accordingly, the wear mechanism transforms from single abrasive wear to a mixed mode of abrasive wear and adhesive wear. This study reproduces the microscopic interfacial working state during the impact-sliding combined wear of shield disc cutters, thoroughly investigates the microscopic wear mechanism of the disc cutter ring material, which can facilitate the understanding of the interaction between disc cutters and formations with varying hardness levels, and provides novel research approaches and methods for the wear performance evaluation of disc cutter ring materials.

搜集汇总

背景与挑战

背景概述

该数据集研究了盾构滚刀刀圈材料H13钢在不同结构刚度下的冲滑复合磨损性能，揭示了磨损机制从磨粒磨损向混合磨损转变的规律，为隧道工程滚刀材料优化提供了实验依据。