Volume 46 Issue 1
Feb.  2018
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QU Feilong, ZHANG Shaohe, WANG Jialiang. Matrix formula for impregnated diamond bit with grids[J]. COAL GEOLOGY & EXPLORATION, 2018, 46(1): 170-175. DOI: 10.3969/j.issn.1001-1986.2018.01.029
Citation: QU Feilong, ZHANG Shaohe, WANG Jialiang. Matrix formula for impregnated diamond bit with grids[J]. COAL GEOLOGY & EXPLORATION, 2018, 46(1): 170-175. DOI: 10.3969/j.issn.1001-1986.2018.01.029
shu

Matrix formula for impregnated diamond bit with grids

  • 1. Key Laboratory of Metallogenic Prediction of Nonferrous Metals and Geological Environment Monitoring (Central South University), Ministry of Education, Changsha 410083, China;

  • 2. School of Geosciences and InfoPhysics, Central South University, Changsha 410083, China;

  • 3. Hunan University of Science and Technology, National Local Joint Engineering Laboratory of Marine Mineral Resources Exploration Equipment and Safety Technology, Xiangtan 411201, China

Funds: 

The Fundamental Research Funds for the Central Universities of Central South University(2017zzts788)

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  • Received Date: May 09, 2017
  • Published Date: February 24, 2018
    Graphical Abstract
    • Abstract
  • In order to improve the efficiency of drilling the hard rock formation, the structure of impregnated diamond bit matrix was designed as grid shape, and the rock fragmentation mechanism of impregnated diamond bit with grids matrix was theoretical analyzed while drilling hard rock formation. Also, Inconel 718 and cobalt chromium alloy samples were prepared by using powder metallurgy, the optimum sintering parameter was determined by studying the effect of sintering parameters on the hardness, abrasive resistance and bending strength. For comparison, the mechanical properties of Inconel 718 and cobalt chromium alloy fetal bodies sintered at the optimum sintering parameter were tested. The results show that Inconel 718 and cobalt chromium alloy both have a high bending strength, which meet the requirements of the bending strength of the matrix. The hardness of Inconel 718 is lower than traditional WC matrix and its abrasive resistance is faint. This is more suitable to be applied in the special working conditions of fast drilling speed, such as emergency investigation of geological disasters; besides, the hardness and abrasive resistance of cobalt chrome alloy are close to the traditional WC matrix and thus cobalt chrome alloy is more suitable to be used as an impregnated diamond bit matrix material.
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    • References (19)
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