Abstract
In order to increase the efficiency of the mechanical transmissions, one of the actually research directions is oriented to develop new materials characterised by high endurance, small friction coefficients and internal structure stability with the temperature. One of these materials is represented by the polyamides which are used in mechanical industry, food industry and medicine. The paper provides the results of tests performed on a tribometer for a PA46 and a Teflon added PA46 polyamide materials being on contact with a PA46 polyamide disk, in lubricated conditions. The tests are achieved for a set of temperatures of the oil bath, a set of rotational speeds of the PA46 polyamide disk and a continuous variation of the local pressure. During the running-in process there are measured the evolution of the dynamic friction coefficient and of the wear. After this, it is studied the variation of the dynamic friction coefficient with the contact pressure, the rotational speed and the temperature. Finally there are given conclusions regarding the tribological behaviour of the tested materials and regarding their applications.
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