碳化钨粉末对聚晶金刚石复合片钻头胎体组织与力学性能的影响  

Effect of cast tungsten carbide powders on microstructure and mechanical properties of polycrystalline diamond compact bit matrix

作　　者：谢焕文[1,2] 刘辛 胡可[1,2] 蔡一湘 XIE Huanwen;LIU Xin;HU Ke;CAI Yixiang(Guangdong Institute of Materials and Processing, Guangdong Academy of Sciences, Guangzhou, 510650, China;National Engineering Research Center of Powder Metallurgy of Titanium & Rare Metals, Guangzhou, 510650, China)

机构地区：[1]广东省科学院广东省材料与加工研究所,广州510650 [2]国家钛及稀有金属粉末冶金工程技术研究中心,广州510650

出　　处：《复合材料学报》2019年第5期1235-1243,共9页Acta Materiae Compositae Sinica

基　　金：广东省省属科研机构改革创新领域项目(2015B070701027);国家国际科技合作专项(2011DFR50740);广东省战略性新兴产业核心技术攻关专项(2011A091102007);广东省科学院院属骨干科研机构创新能力建设专项(2017GDASCX-0117);广东省科学院科研平台环境与能力建设专项(2016GDASPT-0209,2016GDASPT-0102);广州市产学研协同创新重大专项(201604046009);广州市科技计划项目(ZWY201704003);广东省前沿与关键技术创新专项(2015B010122004);广东省公益研究与能力建设专项(2017A070702019)

摘　　要：以铸造碳化钨粉末混合镍粉作为骨架粉末,采用无压浸渍工艺制备了聚晶金刚石复合片(PDC)钻头胎体材料。研究了碳化钨的粉末粒形、粒度及质量分数对PDC钻头胎体的微观组织和力学性能的影响。结果表明,碳化钨的粉末粒形、粒度及质量分数是影响胎体微观组织和力学性能的重要因素。与破碎碳化钨相比,粉末粒度适中的球形碳化钨作为骨架制备的胎体组织更均匀、更致密,胎体的力学性能明显提高。采用150～180μm的球形碳化钨混合13wt%的镍粉作为骨架粉末制备的胎体力学性能优于石油天然气行业标准SY/T 5217—2000,其硬度、冲击韧性和抗弯强度分别为HRC 34、6.7J/cm^2和820MPa。Polycrystalline diamond compact(PDC)bit matrix materials were fabricated by pressureless infiltration method using the cast tungsten carbide powders mixed with nickel powders as the skeleton powders.The effects of the morphologies,particle sizes and content of the cast tungsten carbide powders on the microstructure and mechanical properties of the PDC bit matrix were investigated in detail.The results show that the microstructure and mechanical properties of the prepared PDC bit matrix are significantly affected by the morphologies,particle sizes and content of the cast tungsten carbide powders.In contrast to the traditional cast tungsten carbide,the bit matrix,prepared by using spherical cast tungsten carbide powders with moderate particle size as the skeleton,shows a more homogenous and denser structure and obtained enhanced mechanical properties.The PDC bit matrix,prepared by using spherical cast tungsten carbide powder with particle size of 150-180μm mixed with 13 wt% nickel powders as the skeleton,exhibits better mechanical properties than that of the petroleum industry standard SY/T 5217—2000.Its hardness,impact toughness and bending strength were HRC 34 and 6.7 J/cm^2 and 820 MPa,respectively.

关 键 词：球形铸造碳化钨 无压浸渍 聚晶金刚石复合片(PDC)钻头 胎体 骨架 力学性能 

分 类 号：TF125[冶金工程—粉末冶金] TG146[冶金工程—冶金物理化学]