Study on the application of Cu-Al2O3 as matrix of diamond bit
Lü Zhong-lin1，SHEN Deng-ju2
（1. School of Mechanical and Electronic Information， China University of Geosciences （Wuhan）， Wuhan 430074， China 2. Yunnan Tin Company Limited， Gejiu 661000， China）
Abstract：In order to improve the efficiency of diamond bit， the Cu-Al2O3 cermet composite material was used as the matrix of diamond bit to solve the problem of slow and even slipping of the bit in hard and dense weak abrasive formation. Using the hard and brittle characteristics of the material itself， to drive bit complete the self sharpening of diamond particles depend on the micro cutting and crushing stage， improve the drill grinding efficiency greatly， with stainless steel honeycomb as matrix skeleton to enhance the overall strength and ensure the service life and efficiency of diamond bit. In the experiment of silicon dolomite formation in Kaixian county of Chongqing，Cu-Al2O3 cermet based diamond bit impregnated with honeycomb overcome the difficulty of dense and high indentation hardness of the “skid” formation rock because of its excellent self-sharpening， the drilling efficiency reaches 0.5 m/h， life expectancy increases from 0.3 m to 3.0 m， solving the problem of low drilling efficiency and even bit slipping.
吕仲林，申登举. Cu-Al2O3作金刚石钻头胎体的应用研究[J]. , 2018, 28(01): 50-55.
Lü Zhong-lin，SHEN Deng-ju. Study on the application of Cu-Al2O3 as matrix of diamond bit. , 2018, 28(01): 50-55.
2018, Vol. 28 
