Three-body abrasive wear behaviour of metastable spheroidal carbide cast irons with different chromium contents
| Autor: | Kenta Kusumoto, M. N. Brykov, A. V. Efremenko, T. V. Pastukhova, V. G. Efremenko, Yuliia Chabak, K. Shimizu |
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| Rok vydání: | 2018 |
| Předmět: |
Austenite
Quenching Materials science Abrasion (mechanical) Abrasive Metallurgy Metals and Alloys chemistry.chemical_element 02 engineering and technology engineering.material 021001 nanoscience & nanotechnology Condensed Matter Physics Carbide Chromium 020303 mechanical engineering & transports 0203 mechanical engineering chemistry Martensite Materials Chemistry engineering Cast iron Physical and Theoretical Chemistry 0210 nano-technology |
| Zdroj: | International Journal of Materials Research. 109:147-156 |
| ISSN: | 2195-8556 1862-5282 |
| DOI: | 10.3139/146.111583 |
| Popis: | The effect of heat treatment and chromium contents (up to 9.1 wt.%) on the wear resistance of spheroidal carbide cast iron (9.5 wt.% V) was studied using optical and scanning electron microscopy, X-ray diffractometry, dilatometry and three-body abrasive testing. It was found that quenching from 760 °C and 920 °C improved the alloys’ wear resistance compared to the as-cast state due to the formation of metastable austenite transforming into martensite under abrasion. The wear characteristics of alloys studied are 1.6 – 2.3 times higher than that of reference cast iron (12 wt.% V) having stable austenitic matrix. Chromium addition decreases surface damage due to the formation of M 7C3 carbides, while it reduces wear resistance owing to austenite stabilization to abrasion-induced martensite transformation. The superposition of these factors results in decreasing the alloys’ wear behaviour with chromium content increase. |
| Databáze: | OpenAIRE |
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