金属结合剂金刚石砂轮中铝基结合剂性能优化研究  

Performance optimization of Al-based bond matrix in metallic bond diamond wheel

作　　者：陈克鑫 刘一波[1,2] 曹彩婷 刘伟[2] CHEN Kexin;LlU Yibo;CAO Caiting;LlU Wei(Central Iron&Research Institute Group,Beijing 100081,China;Beijing Gang Yan Diamond Producss Co.,Ltd.,Beijing 102200,China)

机构地区：[1]钢铁研究总院,北京100081 [2]北京安泰钢研超硬材料制品有限责任公司,北京102200

出　　处：《金刚石与磨料磨具工程》2018年第2期20-25,共6页Diamond & Abrasives Engineering

基　　金：北京市科委超硬材料制品工程技术研究中心2013年度科技创新基地培育与发展工程专项:"钨钼靶材用高性能金刚石砂轮技术开发"

摘　　要：以AlSi_(20)为主元,选择强化铝的常用合金元素Cu、Zn、Mg、Mn等4因素(分别用A、B、C、D表示),每个因素各取3个水平,制定了L_9(3~4)正交试验方案。采用热压烧结制备铝基结合剂胎体。通过阿基米德排水法、硬度测试、三点弯曲强度测试、扫描电镜观察断口形貌等方法,研究合金元素对铝基结合剂性能的影响。实验结果表明:添加的合金元素降低AlSi_(20)的烧结温度,促进烧结致密化;合金元素对硬度的影响大小顺序为Mn>Zn>Cu>Mg,对抗弯强度的影响大小顺序为Cu>Mn>Zn>Mg;组合A_1B_2C_2D_2、A_1B_3C_3D_3有高的硬度和抗弯强度,胎体对金刚石包镶紧密;结合剂断裂方式为脆性断裂,可以提高金刚石砂轮的自锐性。Commonly used alloying elements,namely Cu,Zn,Mg and Mn,were selected to strengthen aluminum withAlSi20as themaincomponent.The factors,each with three levels,were marked as A,B,C and D,respectively.The L9(34)orthogonal test scheme was developed.Al-based bonding matrix was prepared by hot pressing sintering.The eefects of alloying elements on matrix were studied by means of Archimedes drainage method,rockwell hardness test,three-point bending strength test and scanning electron microscope.Results show that the addition of alloy elements reduces the sintering temperatureofAlSi20 andpromotes thedensificationof sintering.The influence of alloy elements on hardness is Mn>Zn>Cu>Mg.The influence of bending strength is Cu>Mn>Zn>Mg.In conclusion,the combination of A 1 B2C2D2 and A 1 B3C3D3 have high hardness and bending strength,whose matrices are closely tied to diamond.The fracture mode of binding agent is brittle fracture,which can improve the sel--dressing ability of diamond grinding wheel.

关 键 词：金刚石砂轮 铝基结合剂 脆性断裂 自锐性 

分 类 号：TG74[金属学及工艺—刀具与模具] TG13[一般工业技术—材料科学与工程]