作　　者： (徐建飞）; (邹德永）;

机构地区： 中国石油大学（华东）机电总厂,山东东营257061

出　　处： 《金刚石与磨料磨具工程》 2017年第4期48-52,共5页

摘　　要： 为了解决钢体PDC钻头体硬度低、耐磨性和抗钻井液冲蚀能力差的问题,通过理论分析和室内实验优选了适合钢体PDC钻头的表面硬化方法、表面熔覆涂层材料,形成了火焰喷焊对钻头表面进行熔覆硬化的工艺技术。现场试验结果表明:用Ni60加质量分数为25%~30%的WC组成的自溶性粉末为熔覆材料,制备的钢体表面硬化层质量优良,其耐磨性、耐冲蚀性能可满足钻井需求。 In order to solve the problems of steel body PDC bit,including the lower hardness,poor wear resistance,poor drilling fluid erosion ability of the bit′s body,the preferred mothod for steel body PDC bit surface hardening and preferred material for surface cladding were obtained by means of theoretical analysis and laboratory experiment,and established the flame spray welding technology using for cladding hardening on the bit surface.The results of field test show that the steel surface hardening layer with the cladding materials which are composed of Ni60 and WC of mass fraction 25%-30% has good quality,its abrasion resistance and erosion resistance can satisfy drilling requirements.

关 键 词： 钢体 钻头 喷焊 表面硬化