Earth-working implement

Details Earth-working implement Earth-working implement

1976-05-14

1978-07-04

Steiner, Arthur J.

Metal treatment

Compositions

Heat treating

75123E, 75123R, 75126G, 75128E, C22C 3800

Patent

active

040986225

ABSTRACT:
An earth-working implement of high carbon-high hardness steel wherein the globular shape of the sulfides is retained during the manufacturing process by the addition of strong sulfide-forming additives whereby the "fracture toughness" in the rolling direction is substantially increased thereby resulting in a high strength implement possessing superior fracture resistance properties in all directions including the rolling direction.

REFERENCES:
patent: 2343069 (1944-02-01), Luerssen
patent: 2814580 (1957-11-01), Hoover
patent: 3661537 (1972-05-01), Aronson et al.
patent: 3666570 (1972-05-01), Korchynsky et al.
patent: 3811873 (1974-05-01), DE Barbadillo, II
patent: 3816103 (1974-06-01), Link, Jr. et al.
patent: 3876475 (1975-04-01), Ramquist
patent: 3973950 (1976-08-01), Itoh et al.
patent: 3982969 (1976-09-01), Koros et al.
"Sulfide Shape Control in High Strength Low Alloy Steels," Luyckx, et al., Metallurgical Transactions, vol. 1, 12/70; pp. 3341-3350.
"Effects of Rare Earth Additions on Plain-Carbon Steels," Barnard, U.S. Dept. Int., Bureau of Mines Report #6907, 1967.

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