TESTING OF WEAR IN CONTACT WITH STRENX 700 AND AUTOFRETTED STEEL

Abstract

This paper presents an experimental test of the contact wear between STRENX 700 material and autofretched steel, which is obtained in practice by the autofretching (material reinforcement) of artillery pipes. Three types of lubricants were varied during the test: HD 46 oil, Hysol T15 emulsion, and For 3 grease. Also, the experiment was performed by varying three values of normal load: 10, 20 and 30 N, as well as two values of disk rotation speed: 0.5 and 1 m/s. The test was performed on a tribometer “TR – 95”, which operates on the basis of block-on-disk configuration. “ASTM G 77” standard was used for testing. The metallurgical optical microscope “MEIJI MT8500” was used to image the wear marks. The purpose of the test is to determine the most suitable means of lubricating the contact of the materials used. By a comparative analysis of the results obtained, it was concluded that the emulsion is the most suitable means of lubricating the contact of the materials used, since it allowed very low material consumption under all conditions.