Cu-Sn、Ni-Cr、Co烧结助剂对Ni_(3)Al基金刚石复合材料性能的影响  

ffects of Cu-Sn,Ni-Cr and Co Sintering Additives on Properties of Ni_(3)Al/Diamond Composites

作　　者：卢家锋 张凤林[2] 陈晓昀 LU Jiafeng;ZHANG Fenglin;CHEN Xiaoyun(School of Mechanical and Resource Engineering,Wuzhou University,Wuzhou 543002,China;Faculty of Mechanical and Electronic Engineering,Guangdong University of Technology,Guangzhou 510006,China)

机构地区：[1]梧州学院机械与资源工程学院,广西梧州543002 [2]广东工业大学机电工程学院,广东广州510006

出　　处：《热加工工艺》2024年第15期44-48,共5页Hot Working Technology

基　　金：广西自然科学基金项目(2022GXNSFBA035611);广西高校中青年教师科研基础能力提升项目(2022KY0671);梧州学院2021年校级科研项目(2021C004)。

摘　　要：采用真空热压法制备了Ni_(3)Al基金刚石复合材料,研究了不同烧结助剂对复合材料力学性能和微观结构的影响,并对Ni_(3)Al基金刚石钻头的钻孔性能进行了测试。结果表明,在添加0~30vol%的Cu-Sn、Ni-Cr、Co烧结助剂后,Ni_(3)Al基金刚石刀头的致密度、抗弯强度、硬度得到提高。Ni3Al基金刚石复合材料的抗弯强度随着Ni-Cr、Co烧结助剂含量的增加而提高。Cu-Sn、Ni-Cr烧结助剂中的Cr元素在金刚石的表面出现了富集现象。将添加Cu-Sn、Ni-Cr烧结助剂的Ni_(3)Al基金刚石复合材料制备成工具进行钻削测试,发现Ni_(3)Al基金刚石复合材料的失效形式可以分为微破碎、磨耗、宏观破碎3种形式,钻削试验中并没有发现整颗金刚石脱落的现象,表明Ni_(3)Al基对金刚石的把持力较大,强度较高。Ni3Al/diamond composites were prepared by vacuum hot pressing.The effects of different sintering additives on the mechanical properties and microstructure of the composites were studied,and the drilling performance of the Ni3Al/diamond drilling bit was tested.The results show that,after the addition of Cu-Sn,Ni-Cr,and Co sintering agent ranging from 0 to 30vol%,the density,bending strength and hardness of Ni3Al/diamond tool bit are improved.With the content of Ni-Cr and Co increasing,the bending strength of Ni_(3)Al/diamond composites is increased.Enrichment of the Cr elements in the Cu-Sn and Ni-Cr sintering additives is observed on the surface of the diamond.The Ni_(3)Al/diamond composite materials supplemented with Cu-Sn and Ni-Cr sintering additives were prepared into a tool for drilling and testing.The results show that the failure forms of Ni_(3)Al/diamond composites with Cu-Sn and Ni-Cr sintering additives can be divided into three forms:micro crushing,abrasion and macro crushing.The phenomenon of falling off of the whole diamond is not found in the drilling test,indicating that Ni3Al based has a large holding force on diamond and the strength is high.

关 键 词：Ni_(3)Al Cu-Sn NI-CR 金刚石 复合材料 磨损 

分 类 号：TB333.1[一般工业技术—材料科学与工程]