Effect of alloy composition of materials for TBM cutter rings on microstructure and wear resistance

被引：0
|
作者：
Jia L. [1 ]
Shang Y. [1 ]
Long W. [2 ]
Xia Y. [3 ]
Xue G. [1 ]
机构：
[1] China Railway Engineering Equipment Group Co. Ltd., Zhengzhou
[2] Zhengzhou Research Institute of Machinery Mechanical Engineering Co. Ltd., Zhengzhou
[3] School of Mechanical and Electrical Engineering, Central South University, Changsha
来源：
Zhongnan Daxue Xuebao (Ziran Kexue Ban)/Journal of Central South University (Science and Technology) | 2020年 / 51卷 / 10期
关键词：
Alloy composition; Disc cutter ring; Eutectic carbide; Wear-resisting performance;
D O I：
10.11817/j.issn.1672-7207.2020.10.005
中图分类号：
学科分类号：
摘要：
In order to improve the service life of disc cutter rings in TBM in high erosion lithology, the effects of alloy composition ingredient and type of wear-resistant phase in microstructure on wear resistance were studied. New TBM cutter ring material was blended for microstructure observation. The wear performance was compared through abrasive wear test, scale-reduction rock-breaking test and tunneling rock-breaking test. The results show that the increases of C, Cr, Mo and other alloying elements enhance the formation of wear-resistant phases of eutectic carbides, and have a certain effect on improving the wear resistance of the material, but reduce the impact resistance of the material. The effect of the size and morphology of the wear-resistant phase on the wear resistance and hardness of the material is also different. Large eutectic carbides contribute more to wear resistance than the granular eutectic carbides, and large eutectic carbides contribute slightly less to the hardness than the granular eutectic carbides. In driving high abrasion and weak integrity rock formations, compared with the conventional high toughness C-1 material, the life of the cutter ring of the new C-2 material can be increased by more than 30%, and C-3 new material ring life can be increased by more than 70%. The comprehensive performance of the three materials can meet the requirements of different rock formations, which provides reference for the geological adaptability selection of cutter ring. © 2020, Central South University Press. All right reserved.
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页码：2730 / 2738
页数：8
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