Transactions of Materials and Heat Treatment

Title：Development of new type glass lubricant for hot extrusion of metals

Authors： Zou Feng Feng Chi Liu Qi Duan Sujie

Unit： Beijing TLC Glass Tech Co. Ltd.

KeyWords： hot extrusion nickel-based superalloy seamless tube glass lubricant friction coefficient

ClassificationCode：TG31

year,vol(issue):pagenumber：2025,50(3):144-149

Abstract：

To enhance the processing quality and efficiency of hot extrusion for nickel-based superalloy seamless tube, prevent the high temperature oxidation and alloy element depletion, and protect the die while extending its lifespan, a new type glass lubricant tailored for the hot extrusion process (1000-1150 ℃) of nickel-based superalloy was developed by adjusting the SiO2 and Al2O3 contents in the glass composition. The softening point of the glass lubricant was 740 ℃, the hemispherical point was 822 ℃, the flow point was 897 ℃, and the high temperature viscosity was 1.8-2.4 Pa·s in the hot extrusion temperature range. The high temperature physical properties and high temperature viscosity were well matched with the requirements of the hot extrusion process. Through the ring upsetting experiment, the average friction coefficient of the sample sprayed with the glass lubricant was 0071, while the friction coefficient of the uncoated sample was 0.460, and the friction coefficient was reduced by 84.6%, which effectively reduced the resistance in the hot extrusion process. The results show that the glass lubricant has a good lubrication effect.

Funds：

作者简介：邹丰（1984-），男，学士，工程师 E-mail：zoufeng@tlcglass.com.cn

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