Study on interfacial heat transfer behavior of TA15 titanium alloy and die materials

- Interface heat transfer with and without glass lubrication was analyzed.
- Effects of glass lubrication on interface heat transfer were analyzed.
- The empirical formula of interfacial heat transfer coefficient was established.
- The empirical formula of interfacial heat transfer coefficient has high accuracy.

The curves of contact temperature-time between TA15 titanium alloy and H13 die steel with glass lubrication and without glass lubrication were obtained and the characteristics of the interface heat transfer were analyzed. The corresponding graph and empirical formula between the interfacial heat transfer coefficient (IHTC) and the temperatures of both the titanium alloy and the die steel were established. The results show that glass lubricant can reduce the interfacial heat transfer between the titanium alloy and the die steel effectively. When the initial temperatures of the titanium alloy and the die steel are respectively 700-800 °C and 340-400 °C, the temperature of the contact interface tends to be stable at the time of about 15 s under the condition of glass lubrication, which is about 50% longer than that without glass lubricant. The IHTC is increased from 125 W/(m2 °C) to 1000 W/(m2 °C) with the increase of the contact time under the condition of glass lubrication, while it is increased from 150 W/(m2 °C) to 1800 W/(m2 °C) without glass lubrication. The empirical formula of IHTC obtained in this paper has high accuracy that the error between the simulated and experimental results is less than 10%.