Comparative investigation on rolling behavior of HT200, 45#steel, PTFE and PA66

HUANG Chuanhui, LIN Chaowen

（Department of mechanical engineering, Xuzhou Institute of Technology, Xuzhou, 221111, China）

Abstract: Aiming at the elastic hysteresis effect in rolling friction, the rolling friction behavior under different loads and velocities of HT200, 45# steel, PTFE and PA66 were studied through experiments on a selfmade rolling friction testing equipment and the creep property of PTFE and PA66 were investigated by experiments on CETR UMT2 and LKDM2000 equipment. During experiments, the rule that the rolling friction force varies with velocities and loads was focused and the action mechanism that viscoelastic properties of materials influence the rolling friction was analyzed. In addition, the law that the rolling friction coefficient varies with velocities and loads was discussed at the same time. The results indicate that the rolling friction coefficient rises up with the increment of rolling velocities. The ratio of rolling friction coefficient of HT200, 45# steel, PTFE and PA66 was about 1:0.99:1.03:1.05. The rolling friction force was roughly proportional to the value of PV and the fittingline slopes of PTFE and PA66 was apparently higher than that of HT200 and 45# steel.

Key words: rolling friction coefficient ; rolling friction force; PV