A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
Impact-abrasion wear of wear-resistant steels at perpendicular and tilted angles
Earth moving and processing machinery has to withstand heavy wear caused by impacts and scratching by the soil. Especially, the edges are subjected to heavy wear. To simulate these conditions, impeller-tumbler impact-abrasion wear testing equipment was used to determine the wear resistance of four steel grades at perpendicular and tilted sample angles. The angles were selected to simulate the loading conditions. Natural granite rock was used as abrasive. The amount of wear was clearly smaller in the harder materials. The significance of hardness was quite similar at both sample angles in the steady-state wear of wear-resistant steels. On the initial state wear, hardness had a slightly greater effect at the perpendicular angle due to more severe wear in sample edges already at the beginning of the test. Overall, the largest differences in wear were observed in the sample edges. At the perpendicular sample angle, the sample edges were much more rounded. Some small differences were observed in the surface formations due to dissimilar movement of the abrasive. Deformed surfaces and fractured lips indicated that wear occurred mainly by the deformation of material followed by the removal of the deformed areas through impacts. In addition, scratches and dents were observed. It was found that larger sized abrasives caused higher mass loss than abrasives of similar mass but smaller size. Moreover, same amount of abrasive particles in each test reduces the scatter of the results.
Impact-abrasion wear of wear-resistant steels at perpendicular and tilted angles
Earth moving and processing machinery has to withstand heavy wear caused by impacts and scratching by the soil. Especially, the edges are subjected to heavy wear. To simulate these conditions, impeller-tumbler impact-abrasion wear testing equipment was used to determine the wear resistance of four steel grades at perpendicular and tilted sample angles. The angles were selected to simulate the loading conditions. Natural granite rock was used as abrasive. The amount of wear was clearly smaller in the harder materials. The significance of hardness was quite similar at both sample angles in the steady-state wear of wear-resistant steels. On the initial state wear, hardness had a slightly greater effect at the perpendicular angle due to more severe wear in sample edges already at the beginning of the test. Overall, the largest differences in wear were observed in the sample edges. At the perpendicular sample angle, the sample edges were much more rounded. Some small differences were observed in the surface formations due to dissimilar movement of the abrasive. Deformed surfaces and fractured lips indicated that wear occurred mainly by the deformation of material followed by the removal of the deformed areas through impacts. In addition, scratches and dents were observed. It was found that larger sized abrasives caused higher mass loss than abrasives of similar mass but smaller size. Moreover, same amount of abrasive particles in each test reduces the scatter of the results.
Impact-abrasion wear of wear-resistant steels at perpendicular and tilted angles
Ratia, Vilma (author) / Valtonen, Kati (author) / Kuokkala, Veli-Tapani (author)
2013
10 Seiten, 10 Bilder, 4 Tabellen, 11 Quellen
Conference paper
English
Erdbaumaschine , Bodenbearbeitungsmaschine , Stoßverschleiß , Abrasivverschleiß , Verschleißfestigkeit , Stahl , Stahl (nach Anwendung) , Stahl (nach Eigenschaft) , Lastcharakteristik , Granit , Fels , Härte , Winkel (Geometrie) , Verformung , Verformungsverhalten , Verschleißteilchen , Zugfestigkeit , Streckgrenze , Dehnung , Materialverlust
| British Library Online Contents | 2009
Wear mechanism of abrasion resistant wear parts in raw material vertical roller mills
| British Library Online Contents | 2011
| British Library Online Contents | 1992
Wear behaviour of some low alloyed steels under combined impact/abrasion contact conditions
| British Library Online Contents | 2001
Induction Carburizing for Abrasion, Corrosion and Wear Resistant Applications
| Online Contents | 1999