Effect of alumina hollow spheres on bits drilling into hard and compact rock

YE Hongyu; YANG Zhan; TAN Songcheng; XIE Tao; ZHANG Jianwei

doi:10.13394/j.cnki.jgszz.2018.6.0009

Volume 38 Issue 6

Dec. 2018

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YE Hongyu, YANG Zhan, TAN Songcheng, XIE Tao, ZHANG Jianwei. Effect of alumina hollow spheres on bits drilling into hard and compact rock[J]. Diamond & Abrasives Engineering, 2018, 38(6): 44-47. doi: 10.13394/j.cnki.jgszz.2018.6.0009

Citation:

YE Hongyu, YANG Zhan, TAN Songcheng, XIE Tao, ZHANG Jianwei. Effect of alumina hollow spheres on bits drilling into hard and compact rock[J]. Diamond & Abrasives Engineering, 2018, 38(6): 44-47. doi: 10.13394/j.cnki.jgszz.2018.6.0009

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Effect of alumina hollow spheres on bits drilling into hard and compact rock

doi: 10.13394/j.cnki.jgszz.2018.6.0009

1. Wuhan Wanbang Laser Diamond Tools Co., Ltd., Wuhan 430056, China;
2. Mechanical & Electronic Engineering, China University of Geosciences, Wuhan 430074, China

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Rev Recd Date: 2018-10-02

Available Online: 2022-07-10

Abstract

Abstract

Based on the rock breaking principle, the performance of bits which are used to drill into hard and compact rock is analyzed and studied. The composition and performance of prealloyed powder matrix and the hot pressing process parameters are designed. On this basis, it is proposed to use alumina hollow spheres to weaken the matrix. Tests are implemented by using alumina hollow spheres with 0.3 mm, 0.6 mm and 0.9 mm particle size and 12%, 15% and 18% volume fraction. It is found that the wear resistance of matrices is decreased by 9% to 31%, respectively. In conclusion, the decrease of matrix wear resistance could be decreased by 31.25% when the particle size of alumina hollow spheres is 0.3 mm and its volume fraction is 18%.
- alumina hollow sphere,
- weakened wear resistance,
- prealloyed powder