TBM刀圈材料5Cr5MoSiV1力学及磨损性能研究

Study on Mechanical Properties and Tribological Behavior of New TBM Cutter Ring Material 5Cr5MoSiV1

全断面硬岩掘进机(TBM)滚刀服役于复杂地质环境中极易引起刀圈材料的磨损失效,进而影响施工效率和成本,因此选用合适的耐磨材料十分重要。为此,针对新型刀圈材料5Cr5MoSiV1,通过与传统刀圈材料H13对比,进行了冲击韧性试验和三体磨粒磨损试验,并采用金相分析、硬度分析、SEM微观形貌分析等方法,检测了两种材料的冲击性能和耐磨性能,探讨了材料的磨损特性和机理。结果表明:5Cr5MoSiV1钢热处理后的洛氏硬度相比H13钢高约3.4,硬度提升约6%;5Cr5MoSiV1相比H13钢冲击韧性增加约204.05 J/cm^(2),提升近275%,韧性增加十分显著;H13钢以严重的犁削和凿削为主;5Cr5MoSiV1钢以轻微犁削和划伤为主,且H13钢磨损率相对5Cr5MoSiV1较高,增加约9.3%。

Tunnel Boring Machine(TBM)hob serving in complex geological environment is very easy to cause the tool ring material wear failure,and then affect the construction efficiency and cost,so it is important to choose suitable wear-resistant materials.In this paper,a new cutter ring material 5Cr5MoSiV1 was studied,and compared with the traditional cutter ring material H13,the impact toughness test and three-body abrasive wear test were carried out.The impact and wear resistance of the two materials were tested using metallographic analysis,hardness analysis,SEM microstructure analysis,and other methods,and the wear characteristics and mechanisms of the materials were explored.The results show that the Rockwell hardness of 5Cr5MoSiV1 steel after heat treatment is about 3.4 higher than that of H13 steel,and the hardness is increased by about 6%.Compared with H13 steel,the impact toughness of 5Cr5MoSiV1 increased by about 204.05 J/cm^(2),an increase of nearly 275%,and the toughness increased significantly.H13 steel is mainly heavily ploughed and chiseled;5Cr5MoSiV1 steel is mainly slightly ploughed and scratched,and H13 steel wear rate is higher than 5Cr5MoSiV1,increasing by about 9.3%.