氧化铝空心球在钻进坚硬致密岩石钻头中的作用

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

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

摘要: 基于岩石破碎原理分析研究用于钻进坚硬致密岩石的钻头及其性能，设计预合金粉胎体性能以及热压工艺参数。在此基础上，提出使用氧化铝空心球弱化钻头胎体，并对添加粒度尺寸0.3 mm、0.6 mm、0.9 mm和体积分数12%、15%和18%的氧化铝空心球制备的胎体进行耐磨性能试验。结果表明：胎体耐磨性分别降低了9%~31%；当氧化铝空心球粒度尺寸为0.3 mm，体积分数为18%时，胎体的耐磨性降幅达到最大的31.25%。
- 氧化铝空心球 /
- 耐磨性弱化 /
- 预合金粉
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