球形铸造碳化钨对PDC钻头喷焊层冲蚀性能的影响  

Influence of Spherica Cast Tungsten Carbide on Erosion Resistance of Spray Welding Coating of PDC Drill Bit

作　　者：幸雪松[1] 张会增 胡正惠 刘君[3] XING Xuesong;ZHANG Huizeng;HU Zhenghui;LIU Jun(Beijing Research Center of CNOOC(China)Co.,Ltd.,Beijing 100028,China;State Key Laboratory of Oil and Gas Reservoir Geology and Exploitation,Southwest Petroleum University,Chengdu 610500,China;Second Oil Production Plant of Petrochina Changqing Oilfield,Qingyang 745100,Gansu,China)

机构地区：[1]中海石油(中国)有限公司北京研究中心,北京100028 [2]西南石油大学油气藏地质及开发工程国家重点实验室,成都610500 [3]中国石油长庆油田第二采油厂,甘肃庆阳745100

出　　处：《机械科学与技术》2023年第2期294-300,共7页Mechanical Science and Technology for Aerospace Engineering

基　　金：中国石油科技创新基金项目(2020D-5007-0210);四川省重点研发项目(21ZDYF3109);四川省重点研发项目(21SYSX0054)。

摘　　要：本研究采用氧乙炔喷焊方法制备了不同含量的球形碳化钨和多角状碳化钨颗粒增强的镍基喷焊涂层,研究了钢体PDC钻头碳化钨喷焊层的抗冲蚀性能。结果表明:随着球形碳化钨含量的降低,喷焊层的显微硬度降低,断裂韧性增加,孔隙率先增大后趋于稳定;喷焊涂层的抗冲蚀性随球形碳化钨含量的降低呈先降低后升高的趋势,耐腐蚀性是影响喷焊涂层抗冲蚀性最主要的因素。当球形碳化钨含量为30%时,样品抗泥浆腐蚀性能最差,腐蚀—冲蚀互作用最强,导致样品受冲蚀磨损最严重。建议球形碳化钨含量不低于40%,可以保持喷焊层较高的硬度和抗冲蚀性能。In this work,Ni-based spray welding coatings reinforced with various content of spherical cast tungsten carbide(CTC-S)and angular cast tungsten carbide(CTC-A)particles are fabricated with the oxy-acetylene welding.The erosion behavior of WC-Ni hardfacing used for steel body PDC drill bit are investigated inexperiments.Results show that as CTC-S content decreases,the microhardness of coatings decrease while their fracture toughness increase,and the porosity increases firstly and becomes stable.The erosion resistance decreases firstly and increases with the decreasing of CTC-S content,and the corrosion resistance is the most important factor affecting the erosion resistance of the hardfacing coating.When the content of CTC-S is 30%,the corrosion resistance of the sample is the worst,and the corrosion-erosion interaction is the strongest,leading to serious erosion wear of the sample.It is recommended that the content of CTC-S should not be less than 40%to maintain the high hardness and erosion resistance of the coating.

关 键 词：球形碳化钨 喷焊涂层 腐蚀-冲蚀 PDC钻头 

分 类 号：TE24[石油与天然气工程—油气井工程]