Browsing by Subject "friction coefficient"

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Access status: Open Access ,
Effect of test conditions on wear properties of steel-matrix composites
(Wydawnictwa AGH, 2017) Sulima, Iwona; Hyjek, Paweł
The friction coefficient and wear behavior of 316L austenitic stainless steel and 316L steel + 8vol% TiB? + 1vol% B composites were investigated within a temperature range of 20°C to 800°C. The materials were prepared by the powder metallurgy method. The wear behavior was studied by using a ball-on-disc wear tester at room temperature. The surface before and after wear tests was analyzed using scanning electron microscopy (SEM). The results indicated that the friction coefficient and wear resistance of stel-8TiB?-1B composites depend on the wear test conditions.
Access status: Open Access ,
The high-temperature tribology of iron matrix hypoeutectic alloy after under-annealing normalizing
(2008) Krawczyk, Janusz Ryszard; Dziurka, Rafał; Rożniata, Edyta
This work includes the results of high-temperature tribology test of cast alloy with iron matrix. The paper presents the discussion on the results of the studies of wear mechanisms and friction factor of G200CrNiMo4-3-3 adamite cast steel after three variants of under - annealing normalization. During the heat treatment of cast steel four annealing temperatures were applied: 850, 900, 950 and 1050°C. Annealing was conducted for 10 h, and then the samples were cooled at a rate of 48°C/h to room temperature. Four different annealing temperatures resulted in adequate differences in microstructure of test cast steel what determinated tribological properties of the material. Results obtained allow for determination of optimal, from wear resistance point of view, microstructure of test cast steel used for mill rolls.