(1. 中南大學地球科學與信息物理學院，長沙 410083；
2. 湖南科技大學海洋礦產(chǎn)資源探采裝備與技術(shù)湖南省工程實驗室，湘潭 411201；
3. 中南大學有色金屬成礦預測教育部重點實驗室，長沙 410083)
摘 要: 采用熱壓燒結(jié)法，以WC基混合粉末和 MBD8人造金剛石為原材料，通過改變添加至胎體中的胎體弱化顆粒材質(zhì)，制備鉆進打滑地層用WC基孕鑲金剛石鉆頭，并進行鉆進試驗。采用室內(nèi)鉆進及SEM掃描電鏡分析等手段研究不同胎體弱化顆粒材質(zhì)對鉆頭胎體結(jié)構(gòu)、力學性能和摩擦磨損行為的影響。結(jié)果表明：粒徑小于425 μm的SiC顆粒由于其脆性特性，適當濃度的SiC顆粒能夠減少單位面積上金剛石顆粒數(shù)，利于唇面比壓的提高，進而提高鉆頭碎巖效率；棕剛玉顆粒的脆性破損斷裂的能力較差，無法有效剝落以增加胎體的粗糙度，并促進金剛石的新陳代謝；硬質(zhì)合金鋼丸顆粒由于本身性質(zhì)導致其無法有效促進金剛石出刃，不宜作為胎體耐磨損性弱化顆粒材質(zhì)。
關(guān)鍵字: 孕鑲金剛石鉆頭；非光滑表面；胎體弱化顆粒；耐磨性
（1. School of Geoscience and Info-Physics, Central South University, Changsha 410083, China;
2. Hunan Provincial Key Laboratory of Equipment and Technology for Oceanic Mineral Resource,
Hunan University of Science and Technology, Xiangtan 411201, China;
3. Key Laboratory of Non-ferrous Metal Ore Forecast, Ministry of Education,
Central South University, Changsha 410083, China）
Abstract:The matrix weaken diamond bit was prepared by hot pressing with choosing different kinds of matrix weaken particle materials. The matrix weaken particle materials influence on matrix structure, mechanical properties, friction and wearcharacteristics was studied by interiordrilling test and SEM. The results show that SiC particle with size less than 425 μm can enhance the drilling efficiency and bit pressure by decreasing the diamond quantity of unit area. Brown Corundum can not promote diamond metabolismrapidly because the ability of brittle fracture is weaker, the cemented carbide shot can not choose as matrix weaken particle material because it can not promote diamond metabolism.
Key words: impregnated diamond bit; non-smooth surface; matrix weakening particle; wear resistance
