Tribological behavior of four types of filler metals for hard facing under dry conditions

Abstract

Purpose The purpose of this study is to show which filler metal is the best for hard facing. Because the quality of the surface layer has a great influence on the working life of parts, the purpose was to extend the working life of parts exposed to intensive wear. The tested hard-faced models were made of low carbon steel to save the expensive base metal and to analyze the possibilities of extending the service life of existing structural parts. Design/methodology/approach Samples were prepared from plates hard faced with various filler metals. Samples were then subjected to experimental testing – testing of tribological properties and hardness and microstructure. Testing was done in conditions similar to real ones – with a sliding speed of 0.25, 0.5 and 1 m/s and with a load of 50, 75 and 100 N and in most rigorous dry conditions. Research was done by using a combination of experimental and theoretical approaches. Findings The paper shows the results of the experimental testing of four different filler metals aimed for hard facing of parts exposed to highly intensive wear. Results shown that CrWC 600 alloy is the most favorable filler metal for hard facing of parts such as those of construction mechanization and those subjected to intensive abrasive wear at stone mines. Practical implications All obtained results are real and fully applicable, as there is a huge industrial need for these types of technologies. With the application of these technologies, beside money savings, the working life of parts can be significantly extended. Originality/value The research presented in this paper was conducted because of the lack of results from this area in Serbia and because of the necessity for application of obtained results in companies for road maintenance and stone excavation in the region of Šumadija, Serbia.

Analysis of the Welding Type and Filler Metal Influence on Performance of a Regenerated Gear

“…Arsić et al performed an investigation to show which filler metal is the best for hard facing of parts of the construction mechanization and parts subjected to intensive abrasive wear at stone mines [ 20 ]. Since the quality of the surface layer imposes a great influence on the working life of parts, the purpose was to find which filler metal would contribute to extending the working life of parts exposed to intensive wear.…”

Exploitation Characteristics of Teeth Flanks of Gears Regenerated by Three Hard-Facing Procedures

“…The tribological investigation was performed on model samples, prepared from the hard-faced surfaces, on a tribometer by the “block-on-disc” method, similar to some previous testing [ 30 , 31 ]. The samples were prepared in such a way to simulate the operation conditions of teeth of the coupled gears.…”

Analysis of Certain Physical Properties of Four Rock Materials

“…The main causes of the construction machinery working parts damages were subjects of research of authors of this article [1,2], as well as many others [3][4][5]. The general conclusion, on which the majority of authors agree, is that the service life and intensity of wear of the construction machinery mainly depend on physical and mechanical properties of the rock materials and their aggregates with which they come into contact [6][7][8][9][10][11][12].…”