Metal treatment – Compositions – Heat treating
Patent
1981-09-10
1983-08-02
Skiff, Peter K.
Metal treatment
Compositions
Heat treating
148 36, C22C 3836
Patent
active
043964400
ABSTRACT:
The invention relates to crushing bodies forged from steel having a high carbon content and a finely divided martensitic structure throughout, comprising a carbide content of 2 to 6% by weight, in the form of mixed iron and chromium carbides of the (Fe, Cr).sub.3 C type.
The process for manufacturing these crushing bodies consists in bringing up to a temperature of the order of 900.degree. to 1100.degree. C. a bar or billets of cast or moulded steel and having the desired composition, said bar is possibly cut into billets at said temperature, and said billets are forged at said temperature of 900.degree. to 1100.degree. C.
These crushing bodies allow the crushing of very abrasive materials, for a limited cost.
REFERENCES:
patent: 2182805 (1939-12-01), Hagenbuch et al.
patent: 2310987 (1943-02-01), Noderer
patent: 2438267 (1948-03-01), Bonte
patent: 2462122 (1949-02-01), Nelson
patent: 2763545 (1956-09-01), Breeler
patent: 2771358 (1956-11-01), Spear
patent: 2883281 (1959-04-01), Jatczak
patent: 3595707 (1971-07-01), Faunce et al.
patent: 3844844 (1974-10-01), Sato
patent: 3961994 (1976-06-01), Thome
patent: 4043842 (1977-08-01), Joiret
patent: 4194906 (1980-03-01), Kranz et al.
Metals Handbook, "Properties and Selection of Metals", vol. 1, 8th Edition, 1961, pp. 244-249.
Acieries Thome-Cromback
Skiff Peter K.
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