新型TBM刀圈材料微观组织及耐磨性能研究

TBM刀圈材料是一种对强韧性、耐磨性要求很高的合金钢材料. 目前常用的H13、DC53型TBM刀圈材料综合性能有待提高. 通过优化合金元素配比，制备出一种强韧型综合性能较好的新型TBM刀圈材料DB1，利用光学显微镜和扫描电子显微镜对DB1、H13和DC53的微观组织及断口形貌进行了观察分析，研究了不同载荷和不同硬度岩石条件下DB1与H13、DC53的磨损性能的差异，并对其磨损表面形貌进行扫描电子显微镜观察分析. 结果表明：一次碳化物的平均尺寸和含量对TBM刀圈材料的硬度、韧性及耐磨性有重要影响；适量的一次碳化物有助于提高材料的硬度及耐磨性；过多的一次碳化物会导致材料韧性急剧下降. 岩石抗压强度与刀圈具有匹配性，新型TBM刀圈材料DB1钢用于中等抗压强度的岩石时具有较好的耐磨性.TBM cutter rings are manufactured from alloy steel that demands high strength, toughness and wear resistance. At present, the comprehensive performance of widely used H13 and DC53 TBM cutter ring materials requires further improvement. By optimizing the alloying element ratio, a new high-strength and tough TBM cutter ring material DB1 with excellent comprehensive performance was successfully fabricated. The microstructures and fracture morphologies of DB1, H13 and DC53 were observed and analyzed using optical microscopy (OM) and scanning electron microscopy (SEM). The differences in wear performance among DB1, H13 and DC53 were investigated under various loads and rock hardness conditions, and their wear surface morphologies were also observed and analyzed via SEM. The results demonstrate that: the average size and content of primary carbides exert a significant influence on the hardness, toughness and wear resistance of TBM cutter ring materials; an appropriate quantity of primary carbides contributes to improving the hardness and wear resistance of the material, while excessive primary carbides will cause a sharp drop in the material's toughness. There is a matching compatibility between rock compressive strength and TBM cutter ring materials, and the new DB1 TBM cutter ring material exhibits excellent wear resistance when used for rocks with medium compressive strength.

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背景与挑战

背景概述

该数据集聚焦于新型TBM刀圈材料DB1的微观组织及耐磨性能研究，通过优化合金元素配比制备材料，并对比分析了DB1与H13、DC53在硬度、韧性及磨损性能上的差异。研究揭示了碳化物含量和尺寸对材料性能的关键影响，以及岩石抗压强度与刀圈材料的匹配性，为隧道掘进机刀圈材料的改进提供了实验依据。数据集包含实验数据和相关元信息，以开放获取方式共享。