Wear resistant, powder processed in-situ iron-matrix TiC composites
Wear resistant Fe-Cr-TiC composite alloys have been fabricated by both powder metallurgical (P/M) and melt-solidification (M/S) processing technologies. In M/S processing, TiC and other carbide phases precipitate from the molten alloy, producing a natural, in-situ compostie. Earlier powder approaches mixed iron with TiC powders and consolidated them by either hot-pressing or liquid phase sintering. The advantage of the powder approach was that a more uniform microstructure could be developed. In this study, iron powder was mixed with elemental titanium, chromium and graphite powders, and hot-pressed to full density. During the hot pressing cycle, a Self-propagating, High-temperature, Synthesis (SHS)-type reaction occured, transforming the titanium and chromium powders to TiC and (Fe,Cr)xCy in a steel (Fe-Cr-C) matrix. The influence of alloy composition and SHS process parameters on the microstructure and abrasive wear resistance of the TiC reinforced composite is discussed. It is demonstrated that the in-situ formation of TiC and (Fe,Cr)xCy precipitates during P/M processing allows for careful control of the resultant microstructure, thereby producing a composite with wear resistance comparable to similar materials produced by M/S methods.
- Research Organization:
- Albany Research Center (ARC), Albany, OR
- Sponsoring Organization:
- USDOE - Office of Fossil Energy (FE)
- OSTI ID:
- 923214
- Report Number(s):
- DOE/ARC-1996-010
- Country of Publication:
- United States
- Language:
- English
Similar Records
Powder processing and abrasion resistance of in-situ iron matrix-TiC-reinforced composites
Abrasive wear behavior of P/M titanium metal-matrix composites