Abstract
This paper concerns with the measurement of the friction temperature at friction surface under steady state done with two-colours pyrometer.By using the measurement results thus obtained, the relations among the surface temperature, friction welding conditions and friction welding characteristics are discussed in detail.Major conclusions obtained are as follows:(1) It was revealed that the peak surface temperature at friction interface measured with two-colours pyrometer was well correlated to the mean temperature at friction interface measured with the directthermocouple method.Thus, it seems to be possible to evaluated the mean temperature at the friction interface by measuring the circumferential temperature with the method used in this study with only a little correction.(2) In the range of this experiment, it was observed that the temperature at the friction welding interface became lower with the increase in the friction pressure, and that it did higher with the increase in the friction speed.But, the temperature became to take almost constant value in disregard of the friction speed when further increase in the friction pressure was given.(3) The value of the friction interface temperature can be estimated with the amount of the total energy consumed in the unit volume of the material at the welding interface.
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