Method of removing surface defects of a steel product

Details Method of removing surface defects of a steel product Method of removing surface defects of a steel product

1976-02-13

1977-09-27

Stallard, W.

Metal treatment

Compositions

Heat treating

219 75, B23K 916

Patent

active

040509583

ABSTRACT:
A method of removing surface defects from the surface of a steel product, such as a slab designed for rolling, wherein the defects are melted by an arc generated by an arc welding apparatus having a non-consumable electrode, a guide nozzle about the electrode to maintain an inert gas atmosphere immediately thereabout, and a shield nozzle about the guide nozzle to inject a mainly carbon dioxide gas therefrom, and a deoxidizer is applied to the molten pool formed in the welding operation so as to cover the surface thereof with a slag formed by the deoxidizer which is oxidized.

REFERENCES:
patent: 2640792 (1953-06-01), Binder
patent: 2855337 (1958-10-01), Holub
patent: 3524040 (1970-08-01), Gage
patent: 3692973 (1972-09-01), Oku et al.

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