Abstract
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.
Highlights
A Full-face tunnel boring machine (TBM) is a large tunnel construction operating system integrating mechanical, hydraulic, electronic, and laser technologies
The high temperature compression of H13 steel was conducted at the compression temperatures
The high temperature compression of H13 steel was conducted at the compression temperatures ranging from 100 ◦ C to 700 ◦ C, with the strain rate at 0.01 s−1
Summary
A Full-face tunnel boring machine (TBM) is a large tunnel construction operating system integrating mechanical, hydraulic, electronic, and laser technologies. Compared with the traditional method of drilling and blasting, TBM has the characteristics of fast construction, a short construction period, good working environment and high comprehensive benefits, so it has been widely used in tunnel construction [1,2,3,4]. The main tool for TBM rock breaking is the disc cutters, which are mounted on the cutter head, and the consumption is extremely high due to the poor working conditions, in such conditions, the partial temperature could exceed 600 ◦ C [5,6,7]. In order to reduce the consumption of the cutters, the cutter material needs to have high hardness, high wear resistance, good impact toughness, a certain resistance to tempering performance and a good processing performance [8]. Extensive research have been conducted to explore the optimization of the chemical composition of
Sign-in/Register to view highlights & summary Sign-in/Register to access full text options 
Free) 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a call
