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In this study, high chrome-based white cast iron (HCWCI) balls were subjected to different heat treatments to yield various amounts of retained austenite, following which they were subjected to pin-on-belt abrasion testing. In addition, the role of retained austenite is elucidated, and with that a frame-work is provided for optimising the amount of retained austenite to achieve excellent wear resistance and toughness for these grinding media materials. The effect of retained austenite on wear behaviour was investigated in terms of work hardening and deformation induced transformation of retained austenite to martensite. The worn surfaces of the high chromium white cast iron were studied by scanning electron microscopy. Surface cracks and extensive deformation were observed on the worn surfaces.
In this study, high chrome-based white cast iron (HCWCI) balls were subjected to different heat treatments to yield various amounts of retained austenite, following which they were subjected to pin-on-belt abrasion testing. In addition, the role of retained austenite is elucidated, and with that a frame-work is provided for optimising the amount of retained austenite to achieve excellent wear resistance and toughness for these grinding media materials. The effect of retained austenite on wear behaviour was investigated in terms of work hardening and deformation induced transformation of retained austenite to martensite. The worn surfaces of the high chromium white cast iron were studied by scanning electron microscopy. Surface cracks and extensive deformation were observed on the worn surfaces.
Palavras-chave
Retained austenite; HCWCI; High stress abrasion; Pin on belt; Ball mill; Impact-abrasion testing.
Retained austenite; HCWCI; High stress abrasion; Pin on belt; Ball mill; Impact-abrasion testing.
Como citar
Moema, Joseph S.;
Papo, M. Jones;
Stumpf, Waldo E.;
Slabbert, D..
THE ROLE OF RETAINED AUSTENITE ON PERFORMANCE OF GRINDING MEDIA
,
p. 319-335.
In: First International Brazil Conference on Tribology TriboBr-2010 and 2nd Internacional Tribology Symposium of IFToMM,
Rio de Janeiro,
2010.
ISSN: -
, DOI 10.5151/5463-5463-17252
