不同粒度下Fe-Co-Cu预合金粉末烧结金刚石钻头胎体的组织和性能  

Investigation of microstructure and properties of Fe-Co-Cu pre-alloyed powder sintered diamond drill bit matrix with varying particle sizes

作　　者：舒晨 徐强[2,3] 刘一波[2,3] 杨志威[3] 寇生中[1] 曹睿[1] SHU Chen;XU Qiang;LIU Yibo;YANG Zhiwei;KOU Shengzhong;CAO Rui(Lanzhou University of Technology,Lanzhou 730050,China;Central Iron&Steel Research Institute,Beijing 100081,China;Beijing Gang Yan Diamond Products Company,Beijing 102200,China)

机构地区：[1]兰州理工大学材料科学与工程学院,甘肃兰州730050 [2]钢铁研究总院有限公司,北京100081 [3]北京安泰钢研超硬材料制品有限责任公司,北京102200

出　　处：《粉末冶金工业》2024年第5期61-66,73,共7页Powder Metallurgy Industry

摘　　要：实验采用不同粒度的Fe-Co-Cu预合金粉末配方,通过热压烧结工艺制备了烧结胎体。通过对比分析两种不同粒度预合金粉末烧结胎体的致密度、洛氏硬度、三点抗弯强度、显微组织以及与金刚石的界面形貌,探讨了它们之间的差异。此外,通过钻切实验评估了不同粒度预合金粉末制备的钻头的钻切速度、寿命以及金刚石出露情况,以进一步研究其性能差异。结果表明,更细粒度的预合金粉末DB-02烧结后的胎体具有高致密度(96.9%)和强韧性(抗弯强度达到1 355.7 MPa),同时对金刚石具有更强的把持力,在钻切实验中表现出更快的速度和更长的寿命,刀头金刚石出露高度可达154.2μm。Sintered bodies were prepared using the hot pressing sintering process from Fe-Co-Cu pre-alloyed powders of varying particle sizes.The densification,Rockwell hardness,three-point bending strength,microstructure of the two sintered bodies of different particle sizes,and interface morphology between sintered body and diamond were comparatively analyzed.Furthermore,cutting experiments were conducted to assess the cutting speed,tool life,and diamond exposure of drill bits prepared using pre-alloyed powders with varying particle sizes to further investigate their performance disparities.The results indicate that the sintered body of DB-02,prepared with pre-alloyed powder of finer particle size,exhibits higher density(96.9%)and improved toughness(with a bending strength of 1355.7 MPa).The modified tool design also results in enhanced retention force on the diamond,leading to improved cutting efficiency,extended tool lifes,and a maximum diamond exposure height of 154.2μm during cutting experiments.

关 键 词：Fe-Co-Cu预合金粉末 致密度 抗弯强度 金刚石钻头 钻切试验 

分 类 号：TF124.5[冶金工程—粉末冶金] TQ163[冶金工程—冶金物理化学]