Electric heating – Metal heating – Nonatmospheric environment at hot spot
Patent
1977-02-17
1979-03-06
Kucia, Richard R.
Electric heating
Metal heating
Nonatmospheric environment at hot spot
219 7614, 219137WM, 21914623, B23K 904, B23K 918
Patent
active
041432584
ABSTRACT:
A method of applying a hard facing of an iron or steel former (e.g. a roll of a rolling mill) in which a consumable electrode is melted on to the surface of the former by a submerged arc or gas shielding welding process and in which the former and the welding head are moved relative to one another to deposit a bead of weld metal on to the former. The consumable electrode is chosen to give a weld metal deposit comprising by weight, from 0.03% to 0.12% carbon, from 0.20% to 0.75% silicon, from 0.50% to 1.50% manganese, from 4.50% to 6.50% nickel, from 12.0% to 17.0% chromium, from 1.5% to 2.0% molybdenum, from 1.2% to 2.0% copper, from 0.2% to 0.9% niobium, up to 0.04% sulphur, up to 0.04% phosphorus and up to 0.06% nitrogen, the balance being iron and incidental impurities, the ratio of nickel and copper to the carbide forming elements being chosen to achieve a microstructure of between 3% and 10% delta-ferrite in the interdentritic regions thereof.
REFERENCES:
patent: 3549410 (1970-12-01), Farmer, Jr.
patent: 3571553 (1971-03-01), Godai et al.
patent: 3975610 (1976-08-01), Bagshaw et al.
Bagshaw Trevor
McCann John
British Steel Corporation
Kucia Richard R.
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