Metal treatment – Stock – Ferrous
Patent
1990-04-27
1991-08-27
Dean, R.
Metal treatment
Stock
Ferrous
148322, 148325, 148 3, C21D 500
Patent
active
050430289
ABSTRACT:
An austemperable cast iron which includes an ausferritic matrix, the cast iron having a silicon content of from about 1.6 to about 2.4 weight percent, and a carbon content of from about 1.6 to about 2.2 weight percent, such that the carbon equivalent of the cast iron is from about 2.1 to about 3.0 weight percent. The austempered cast iron is prepared by melting the cast iron composition; to about 1650.degree.-1900.degree. F. and maintaining the temperature of the casting at that temperature until substantially all of the eutectic carbide particles convert to temper graphite nodules to form a temper graphite-containing casting, then cooling the temper graphite-containing casting to about 1500.degree.-1750.degree. F. and maintaining the temperature of the tempered graphite-coating at about 1500.degree.-1750.degree. F. until a fully austenitic matrix is achieved, and then quenching and cooling the ausferritic matrix casting to room temperature before bainite is formed.
REFERENCES:
patent: 3549431 (1970-12-01), Castelet et al.
Metals Abstracts, 83(6):31-224, 1983.
Metals Abstracts, 86(7):61-358, 1986.
Metals Abstracts, 86(12):56-1338, 1986.
Metals Abstracts, 90(1):56-39, 1990.
J. Heat Treating, vol. 4, No. 1, 6/1985, pp. 25-31, Janowak et al.
Keough John R.
Kovacs Bela V.
Pramstaller Douglas M.
Applied Process
Cargill Lynn E.
Dean R.
Phipps Margery S.
LandOfFree
High silicon, low carbon austemperable cast iron does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with High silicon, low carbon austemperable cast iron, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and High silicon, low carbon austemperable cast iron will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-1412041