A Study on Quantitative Evaluation of Seizure Resistance by Comparing Seizure Interface during Plastic Working with Friction Pressure Welding Interfaces

Abstract

Improving seizure resistance in plastic working is a major issue in tribology, but there are few clear guidelines for achieving this using surface treatment. This is likely due to the lack of a method for theoretically and quantitatively evaluating seizure resistance of tool surface treatments. Therefore, the authors focused on the adhesion strength between seizure and the tool surface as a quantitative index of seizure resistance. In this study, Friction pressure welding (FPW) was adopted as a measurement technique. And the effect of tool surface treatments on seizure resistance during hot rolling and FPW strength was investigated. The respective bonding mechanisms with the tool surface were also examined. The results showed the same orders of FPW strength and degree of seizure in hot rolling: polished surface > Cr plating > oxide film. Observation and analysis of bonding interfaces showed that the FPW interface had a higher temperature than the seizure interface during hot rolling, but the bonding mechanism was inferred to be very similar. These results show it is possible to quantitatively evaluate seizure resistance by evaluating seizure point strength using FPW with a controlled amount of friction heating.