轻型牙钻机粉末冶金双联凸轮的开发与应用  

Development and application of powder metallurgy double-linked cam for lightweight dental drilling rig

作　　者：叶敏翎 黄永强 YE Minling;HUANG Yongqiang(Guangzhou Rallway Polytechnic,Guangzhou 511300,China)

机构地区：[1]广州铁路职业技术学院,广东广州511300

出　　处：《粉末冶金工业》2024年第6期50-56,共7页Powder Metallurgy Industry

基　　金：广东省教育科学研究课题—高等教育科学研究专题(2023GXJK863)

摘　　要：双联凸轮作为轻型电动牙钻机的主要传动零件,需具有轻便性及优良的力学性能。本文采用有限元Deform软件对不同模具结构方案下的压坯密度进行模拟分析,并基于Fe-Cr-Mo烧结硬化材料分别对常规烧结工艺、浸铜烧结工艺、常规烧结+渗碳淬火工艺以及浸铜烧结+渗碳淬火工艺四组试验进行研究,从合金成分、密度以及微观组织等角度分析不同工艺对力学性能的影响。最终选取“上二下三”的模具结构方案,采用浸铜烧结+渗碳淬火的组合工艺,成功制备出了高硬度、高耐磨性的双联凸轮。The double-linked cam,as the main transmission part of a lightweight electric dental drill,is required to have lightness and excellent mechanical properties.In this paper,the finite element software-Deform was used to simulate and analyze the green compact under different die structure schemes.Based on Fe-Cr-Mo sintered hardening material,the effects of four different processes,including conventional sintering,copper infiltration sintering,conventional sintering+carburizing quenching and copper infiltration sintering+carburizing quenching,on mechanical properties were analyzed from the aspects of alloy composition,density and microstructure.Finally,the mold structure scheme of‘two upper punches and three lower punches’is selected,and a combination of copper dipping and carburizing is adopted to successfully prepare the double-linked cam,which owns excellent hardness and wear resistance.

关 键 词：粉末冶金 双联凸轮 Deform模拟 浸铜 渗碳淬火 

分 类 号：TS914.5[轻工技术与工程] TF125[冶金工程—粉末冶金]