Importance of tribological investigations in selecting the technology for reparation of working parts of construction mechanization

Abstract

The aim of this paper is to point out the importance of tribological testing in the procedure for choosing the proper technology for both reparatory and production hard facing technology for same parts of construction mechanization exposed to intensive wear. The proposed procedure is shown on several examples of constructions equipment parts. Three filler materials were chosen and hard facing was conducted by applying it on specific samples. From hard faced layers and base materials of samples, blocks for tribological investigations were prepared. Wear resistance of the test blocks was monitored through the wear scar width. Results of tribological tests have shown that blocks which had been prepared from hard faced layers were more resistant to wear than the blocks which had been prepared from base material. Besides, the hard facing technology used on a samples was transferred to real working parts. Real parts were then mounted on construction equipment in order to test it in exploitation conditions. In these geometry and weight loss were checked, as the parameters of wear resistance. For tested working parts, working conditions and used filler materials, tribological properties investigation had shown high correlation with investigation of parts properties in real working conditions and also as one of the major criteria, tribological properties can be used as a guideline in the process of choosing the hard facing technology.