The Preparation of H13 Steel for TBM Cutter and the Performance Test Close to Working Condition

Applied Sciences

Maosen Wang¹  Mingze Wang²  Jiyu Tian³  Hongwei Zhao³  Mingxu Xu³  Yong Hu³  Aiwu Zhang⁴ 

[1] School of Construction Engineering, Jilin University, Changchun 130026, China;School of Material Science and Engineering, Jilin University, Changchun 130025, China;School of Mechanical and Aerospace Engineering, Jilin University, Changchun 130025, China;Welter Tunnel Equipment Co., Ltd., Jilin 132000, China;

关键词: H13 steel;    TBM disc cutter;    high temperature compression;    hardness;   

DOI  :  10.3390/app8101877

来源: DOAJ

【 摘 要 】

The material of disc cutters is important to full-face tunnel boring machines (TBM). In recent years, disc cutters were optimized and tested by many scholars all around the world. H13(4Cr5MoSiV1) steel is widely used due to its excellent properties, especially in TBM disc cutters. In this paper, H13 steel with optimized composition was prepared and heat treatment. The high temperature compression of H13 steel was conducted at the temperatures ranging from 100 °C to 700 °C, with strain rate at 0.01 s−1. The stress-strain curves, Rockwell hardness and microstructure of H13 steel after compression were obtained and analyzed. The results showed that the compression strength and hardness decreased as the temperature increased; and the compression strength, hardness and ductility decreased rapidly between 600 °C and 700 °C, HR700 (the hardness of H13 steel at 700 °C) only reached 33.23 HRC. It is not recommended for TBM disc cutters to work in an environment over 600 °C.

【 授权许可】

Unknown