Transactions of Materials and Heat Treatment

Title：Lubrication technology on vacuum isothermal forging

Authors： Zhou Yaoqing He Xiaomao Zhou Leyu

Unit： Beijing Research Institute of Mechanical & Electrical Technology Co. Ltd. CAM

KeyWords： vacuum isothermal forging glass lubricants friction factor wettability property high-temperature viscosity

ClassificationCode：TG316

year,vol(issue):pagenumber：2023,48(12):217-223

Abstract：

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 40-50 μm. 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 ℃.

Funds：

中国机械科学研究总院集团有限公司技术发展基金项目

作者简介：周耀青（1995-），男，硕士研究生 E-mail：zhouyaoqing2013@126.com 通信作者：贺小毛（1971-），男，博士，正高级工程师 E-mail：hexiaomaos@163.com

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