DETERMINATION OF FRICTION COEFFICIENT BY COMPRESSION OF RING SAMPLE DURING HOT DEFORMATION
This paper presents an algorithm for the calculation of the coefficient (index) of friction at compression of the ring in hot deformation. The calculation considered the temperature-speed parameters of hot deformation: temperature of the workpiece, temperature of dies, the thermophysical properties of material of a workpiece and a die, parameters of equipment. Calculated curves for μ = μ (r). The authors give the comparative results of calculations and experiments on compression of ring samples in hot conditions.