About the article
V.V. IZMAILOV, Dr. Sc., L.E. AFANASIEVA, Cand. Sc., M.V. NOVOSELOVA, Cand. Sc.
The results of the experimental study of the static friction coefficient of high-speed steel R6M5 samples after gas-laser cutting and hardened according to the standard technology are presented. Based on the interpretation of the Amontons and Coulomb laws of friction as equations of linear regression of the friction force on the normal pressure force, the values of the friction coefficients of the steel samples in contact with spherical indeters made of various materials: zirconium, ZlM800 copper-gold alloy and corundum were obtained by statisticalprocessing of the experimental results. The values of the specific friction force (shear strength of the frictional contact) have been experimentally measured. It is shown that the specific friction force depends very little on the normal contact pressure (average normal stress in the contact). The value of the specific friction force in the contact of R6M5 steel with a corundum indenter is several times greater than that in contact with metal indenters.
high-speed steel, gas laser cutting, friction coefficient, specific friction force, Amontons – Coulomb friction laws, linear regression.