烧结工艺对CuSnZn合金粉末性能的影响  

Effect of sintering process on properties of CuSnZn alloy powder

作　　者：曹新民 鲍丽 李振 程传卫 陈鹏 潘建军 于奇 于新泉 CAO Xinmin;BAO Li;LI Zhen;CHENG Chuanwei;CHEN Peng;PAN Jianjun;YU Qi;YU Xinquan(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)

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

出　　处：《金刚石与磨料磨具工程》2024年第4期449-455,共7页Diamond & Abrasives Engineering

基　　金：国家自然科学基金(52005452)。

摘　　要：提高金刚石工具的性能并控制其生产成本已成为工程应用领域的重点研究方向。本研究中,通过雾化法制备不同Zn质量分数(10.00%~30.00%)的CuSnZn合金粉末,在610~655℃不同的热压烧结温度和21 MPa的烧结压力下制备烧结节块,并对烧结节块的理论密度、洛氏硬度、抗弯强度、显微形貌进行分析。结果表明:随着Zn含量升高,CuSnZn合金粉末熔化温度逐渐降低,当Zn质量分数为30.00%时,熔化温度降低到848℃;当Zn质量分数为20.00%时,烧结节块致密度降低至97.6%;烧结节块的抗弯强度先升高后降低,当Zn质量分数为20.00%时,达到最大值542 MPa;烧结节块中的黄铜由α相逐渐转变为α+β相和α+β+β′相,其洛氏硬度显著提升;节块的断裂方式由沿晶断裂逐渐过渡到穿晶断裂。Objectives:Diamond tools are crucial in stone processing,and their performance is directly related to pro-cessing quality and cost.With the rise of stone and labor costs,the performance requirements on diamond tools are also increasing,including sharpness,self sharpening,tool life,and cutting efficiency.To improve efficiency and reduce costs,users often increase the cutting machine power and speed,which further requires diamond tools to have higher sharpness and strength at the risk of breakage.A practical method method is to increase the content of tin(Sn)in the segment to enhance its brittleness without changing the diamond concentration and particle size.However,an increase in Sn content will reduce the strength of the segment and may lead to a decrease in the holding force between CuSn al-loy and diamond.For example,the commonly used CuSn10 and CuSn15 pre alloy powders in industry have low strength and weak holding force on diamond.Therefore,it is necessary to improve the powder properties and pro-cessing technology.Methods:Adding Zn element to CuSn10 alloy powder can improve powder strength and holding force.CuSnZn-x alloy powder(mass fraction of Zn,x=10.00%,15.00%,20.00%,25.00%,30.00%)was prepared by at-omization process.The hot pressing sintering temperatures were 610℃,615℃,630℃,645℃,655℃,and the sinter-ing pressure was 21 MPa.The melting temperature of CuSnZn alloy powder was tested using a differential thermal ana-lyzer.The density of the sintered segment was tested using Archimedes drainage method.The bending strength of the sintered segment was tested using mechanical performance testing equipment.The Rockwell hardness of the sintered segment was measured using a Rockwell hardness tester.The microstructure morphology of the sintered segment and its fracture were analyzed using scanning electron microscopy.Other performances of samples with different Zn contents were analyzed and compared as well,namely theoretical density,Rockwell hardness,and flexural strength,to study the influence of Zn co

关 键 词：CuSnZn合金粉末 致密度 沿晶断裂 

分 类 号：TG74[金属学及工艺—刀具与模具]