Influence of carbon content of martensitic matrix and retained austenite on wear of martensitic ductile iron

• Published in: Wear Vol. 162; no. A; pp. 75 - 82
• Main Authors: Li, C-G, Zhou, Q-D, Song, G-S, Fang, Z-S
• Format: Journal Article
• Language: English
• Published: Elsevier B.V 13.04.1993
• ISSN: 0043-1648; 1873-2577
• DOI: 10.1016/0043-1648(93)90486-6

The influence of the carbon content of the martensitic matrix (at different austenizing temperatures) and the amount of retained austenite (AR) on the two-body abrasion and impact abrasion wear of martensitic ductile iron was studied. The results showed that: (1) the wear of martensitic ductile iron in two-body abrasion is a process of plastic deformation fatigue in the case of a soft abrasive, but a process of cutting in the case of a hard abrasive; (2) the carbon content in the martensitic matrix has an optimal value in impact wear testing; (3) the effect of AR on wear resistance depends on the loading condition. When the load is without impact such as in two-body abrasion, the retained austenite contributes to the wear resistance if the process is controlled by a fatigue mechanism; however, it has no significant effect on wear resistance if the process is controlled by the cutting mechanism. However, under impact load, retained austenite is harmful to the wear resistance.