Abrasive wear of high speed steels: Influence of abrasive particles and primary carbides on wear resistance |
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Authors: | E Badisch C Mitterer |
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Affiliation: | a Materials Center Leoben, Franz-Josef-Straße 13, A-8700, Leoben, Austria;b Department of Physical Metallurgy and Materials Testing, University of Leoben, Franz-Josef-Straße 18, A-8700, Leoben, Austria |
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Abstract: | A ball cratering test has been used to investigate the abrasive wear of high speed steels with different volume fraction and size of primary carbides. Three different abrasives, SiC, Al2O3 and ZrO2 were used. Wear mechanisms were investigated by scanning electron microscopy (SEM). A good correlation between the hardness of the abrasives and the abrasive wear coefficient was found. Higher abrasive wear resistance was determined for steels containing coarser primary carbides compared to those without or with smaller carbides. The most pronounced difference in abrasive wear resistance was found for Al2O3 abrasives. This indicates that in ball cratering the abrasive medium has to be chosen properly, i.e. with a hardness adjusted to those of both primary carbides and martensitic matrix, to obtain results suitable to rank high speed steels with respect to abrasion resistance. |
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Keywords: | Abrasive wear High speed steel Ball cratering Primary carbides |
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