真空等温锻造润滑技术  

Lubrication technology on vacuum isothermal forging

作　　者：周耀青 贺小毛 周乐育 Zhou Yaoqing;He Xiaomao;Zhou Leyu(Beijing Research Institute of Mechanical&Electrical Technology Co.,Ltd.CAM,Beijing 100083,China)

机构地区：[1]中国机械总院集团北京机电研究所有限公司,北京100083

出　　处：《锻压技术》2023年第12期217-223,共7页Forging & Stamping Technology

基　　金：中国机械科学研究总院集团有限公司技术发展基金项目。

摘　　要：为了改善真空等温锻造中的润滑问题,针对两种自制的玻璃润滑剂RD-1和GR-2,采用座滴法测量了润湿角,采用示差法测定了线膨胀系数,采用旋转法测定了高温黏度,采用试烧法并结合扫描电镜观察了涂层与基体的结合情况。在不同工艺条件下开展了真空等温压缩试验,以探究摩擦因数与工艺参数的关系。试验结果表明:在真空等温锻造中,RD-1玻璃润滑剂具有更好的润湿性和更低的高温黏度;两种玻璃润滑剂的线膨胀系数相近,界面涂层厚度均为40~50μm;在950~1000℃的锻造温度区间,RD-1玻璃润滑剂的摩擦因数更低,表现出更好的润滑性能,更适合于1000℃以下的真空等温锻造工艺。In order to solve the lubrication problems in vacuum isothermal forging,for two glass lubricants RD-1 and GR-2,the wetting angle was measured by the seat drop method,the linear expansion coefficient was measured by the differential method,the high-temperature viscosity was measured by the rotation method,and the combination of coating and substrate was observed by the trial firing method combined with scanning electron microscopy.Then,vacuum isothermal compression tests were conducted under different process conditions to explore the relationship between friction factor and process parameters.The experimental results show that RD-1 glass lubricant has better wettability property and lower high-temperature viscosity in the vacuum isothermal forging.The linear expansion coefficients of the two glass lubricants are similar,and the thicknesses of the interface coating are both 40-50μm.In the forging temperature range of 950-1000℃,the friction factor of RD-1 glass lubricant is lower,which shows better lubrication performance and is more suitable for the vacuum isothermal forging process below 1000℃.

关 键 词：真空等温锻造 玻璃润滑剂 摩擦因数 润滑性 高温黏度 

分 类 号：TG316[金属学及工艺—金属压力加工]