buletinul institutului politehnic din iaşi - Universitatea Tehnică ...

214 Marian Teodor Popescu et al.
2. Experimental Device
Atmospheric tribometer, equiped with a radiative oven (TFA). The
tribometer used for tests was made by Adamou in the tribology laboratory of
ENI Tarbes (Fig. 1). The contact configuration is pawn-disc type.
Fig. 1– The test device and the samples and the pawn dimensions.
During the test, the following parameters have been enlisted, with the
contact pickoff help: the friction coefficient as a raport between the tangential
force and the normal force, in ASCII or EXCEL format; the vertical movement
of the samples, represented by the material wear; the friction coefficient
evolution over time; the contact surface temperature (see Tables 1–3).
The pawn having the plane friction surface is made from steal „Stub”
X22CrNi17, hardness 247 HV30.
Table 1
Functional Parameters
Friction Slipping Configuration, type Plane, open
method
of contact
Type of Uniaxial Conformity of In accordance with the
movement rotation
contact
surface
Ø Punch 6 mm Ø disc 37 mm
Surface of
contact
113 mm 2 Average pressure