金属包覆FeCuNi粉末对金刚石工具胎体性能的影响  

Effect of metal coated FeCuNi powder on properties of diamond tool matrix

作　　者：曹新民 鲍丽 李振 程传卫 陈鹏 潘建军 于奇 于新泉 陈生超 CAO Xinmin;BAO Li;LI Zhen;CHENG Chuanwei;CHEN Peng;PAN Jianjun;YU Qi;YU Xinquan;CHEN Shengchao(Zhengzhou Research Institute of Mechanical Engineering Co.,Ltd.,Zhengzhou 450001,China;Zhengzhou Emerging Industry Technology Research and Promotion Center,Zhengzhou 450001,China;Zhengzhou Science and Technology Innovation Service Center,Zhengzhou 450001,China;Henan Xinda Fusion Technology Co.,Ltd.,Zhengzhou 450001,China;ZRIME Gearing Technology Co.,Ltd.,Zhengzhou 450001,China)

机构地区：[1]郑州机械研究所有限公司,郑州450001 [2]郑州新兴产业技术研究促进中心,郑州450001 [3]郑州市科技创新服务中心,郑州450001 [4]河南信大融合科技有限公司,郑州450001 [5]郑机所(郑州)传动科技有限公司,郑州450001

出　　处：《金刚石与磨料磨具工程》2024年第5期581-587,共7页Diamond & Abrasives Engineering

基　　金：国家自然科学基金“超多元组分钎料的逆向强化调控机制及其钎焊行为”(52005452)。

摘　　要：为解决Co基金刚石工具成本高,Fe基金刚石工具烧结温度高、把持力弱、胎体易烧死等问题,通过化学法将Cu、Sn、Bi等金属分别包覆于FeCuNi合金粉末表面,制备成金属包覆FeCuNi合金粉末。结果表明:配方中添加金属包覆FeCuNi合金粉末后,三点抗弯强度提高近20%;金属包覆FeCuNi合金粉末烧结过程中,FeCuNi颗粒表面的Sn、Bi率先熔化,与Cu反应形成的Cu-Sn、Cu-Bi等液相能够形成连续的网络状结构,将FeCuNi、Fe、Ni等颗粒包裹和黏结,使得金刚石工具胎体的成分和组织结构分布更加均匀、更加致密,避免了成分偏析的发生。通过以上试验得到初步结论,金属包覆FeCuNi合金粉末可等效替代贵重金属Co,极大地降低金刚石工具生产成本,具有显著的经济效益。Objectives:Diamond tools are widely used in fields such as oil drilling,geological exploration,and stone processing,among which sintered metal bond diamond tools have become the most representative due to their wide applicability and strong durability.Cobalt(Co)has become the preferred material for preparing diamond tools due to its excellent physical properties,but its price is relatively expensive.As market competition gradually intensifies,the application range of Co is becoming limited.It has been found that Fe-based pre-alloy powder has similar properties to Co and can be used as an important way to reduce costs.However,Fe-based diamond tools face problems such as high sintering temperature,narrow controllable process range,easy erosion of diamond,weak holding force,and the tendency for the matrix to burn during production.Additionally,the Sn element is prone to segregation and loss during long-term sintering in the furnace,resulting in unstable performance of diamond tools.This article describes the preparation of Fe-CuNi-Cu/Sn/Bi alloy powder using a multi-layer coating process to improve the densification of diamond matrix sintering and reduce component segregation.Methods:Co powder,Cu powder,Fe powder,Sn powder,Ni powder,and Fe-CuNi alloy powder were selected,and Cu,Sn,and Bi were respectively plated onto the surface of FeCuNi alloy powder by chemical methods,forming a uniform coating on the surface.Metal powder and diamond were mixed using a threedimensional mixer for 2 hours.After mixing,the required weight of uniform powder was weighed,and sample blocks with dimensions of 4 mm×8 mm×40 mm were prepared using a hot press sintering machine.The mold material was graphite,and 4 sample blocks were prepared for each group.The experiment was repeated twice.For the tested materials,Rockwell hardness was measured,as well as the three-point bending strength.The microstructure and energy spectrum were analyzed using an electron microscope,and the changes in composition,structure,and mechanical properties of the

关 键 词：金刚石工具 金属包覆FeCuNi合金粉末 胎体 

分 类 号：TG74[金属学及工艺—刀具与模具]