Effect of high temperature and sub-ambient treatments on the matrix structure and abrasion resistance of a high-chromium white iron

Journal Article · Tue May 12 04:00:00 EDT 1998 · Scripta Materialia

DOI:https://doi.org/10.1016/S1359-6462(98)00118-3· OSTI ID:619519

Tabrett, C P ^[1]; Sare, I R ^[2]

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1. C W Pope and Associates Pty Ltd., New South Wales (Australia)
2. CSIRO Manufacturing Science and Technology, Clayton, Victoria (Australia)

High-chromium white iron alloys are commonly used for wear resistant applications in the mining and minerals industry. The influence of the microstructure of the high-chromium white irons on the abrasion resistance has been studied extensively, as a recent review has highlighted. Previous research has recognized that the abrasion resistance of these alloys is primarily determined by the features of the hard alloy carbides that form, such as the volume fraction, hardness and the orientation. The structure of the matrix that supports the carbides may be altered extensively by alloying and thermal treatment, and has also been shown to influence the wear behavior. A number of studies have considered the effect of the retained austenite content on the abrasion resistance of alloy white irons. It is common that a martensitic matrix (containing little retained austenite) performs better with soft abrasives, while an austenitic matrix gives the better wear resistance with hard abrasives. More precisely, it has been found that for a given wear situation, the best abrasion resistance is obtained with a retained austenite content of greater than 20%. This study aims to consider the effect of the retained austenite content on the abrasion resistance of a high-chromium white iron, while maintaining a constant carbon level, and hence constant austenite stability.

• OSTI ID: 619519
• Journal Information: Scripta Materialia, Journal Name: Scripta Materialia Journal Issue: 12 Vol. 38; ISSN 1359-6462; ISSN SCMAF7
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
CHROMIUM ALLOYS
IRON ALLOYS
MICROSTRUCTURE
TEMPERATURE DEPENDENCE
WEAR RESISTANCE