Method of hot reducing ferrous and ferrous alloy products with c

Details Method of hot reducing ferrous and ferrous alloy products with c Method of hot reducing ferrous and ferrous alloy products with c

1975-11-17

1976-12-14

Stallard, W.

Metal treatment

Compositions

Heat treating

29132, 291961, 148 34, C22F

Patent

active

039973700

ABSTRACT:
This invention is directed to a method of hot reducing ferrous and ferrous alloy products, such as plates, strip, bars and rods, where such products are heated to temperatures in excess of 1900.degree. F and subsequently reduced at temperatures within the range of about 900.degree. and the initial heating temperature. More particularly, this invention relates to the method of effecting said hot reducing at such temperatures by means of composite, martensitic, nodular graphite chill cast iron rolls. Such rolls are characterized by (1) an average surface hardness of at least about 76 Shore-C, (2) a thermal-crack-resistant chill cast surface portion consisting essentially of, by weight, about 3.00% to 3.70% carbon, about 0.35% to 1.25% manganese, about 1.0% to 2.0% silicon, about 3.75% to 5.75% nickel, about 0.75% to 1.35% chromium, about 0.40 to 1.10% molybdenum, about 0.3% to 0.08% magnesium, balance iron and incidential impurities, and (3) a core portion comprising a ferrous alloy.

REFERENCES:
patent: 2129683 (1938-09-01), Gontermann et al.
patent: 3623850 (1971-11-01), Horvath, Jr.
patent: 3670381 (1972-06-01), Schoffmann
patent: 3855015 (1974-12-01), Nemoto et al.
patent: 3894325 (1975-07-01), Maruta et al.

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