Method of surface hardening

Details Method of surface hardening Method of surface hardening

1972-09-07

1976-12-28

Lovell, C.

Metal treatment

Compositions

Heat treating

75123CB, 75124, 148 3, 148 13, 148 35, 148 39, 219121EB, 418178, C21D 106, C21D 500, H05B 700

Patent

active

040000117

ABSTRACT:
A method of surface hardening for forming a hardened layer of cemented carbide, including cementite, on a local surface area of cast iron by rapidly melting the local surface by means of a rapid melting process such as the electron bombardment melting process to form a molten pool thereon, then rapidly cooling the molten pool by the chilling effect of the non-molten portion of cast iron and finally finishing the cast iron having the hardened layer thus formed to a desired shape. To this end, the cast iron used contains therein one or a mixture of deoxidizing agents such as aluminum, magnesium and calcium.

REFERENCES:
patent: 2184518 (1939-12-01), Eash et al.
patent: 2968723 (1961-01-01), Steigerwald
patent: 3033676 (1962-05-01), Cox
patent: 3658451 (1972-04-01), Gomada

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