FORFARANDE OCH ANORDNING FOR NEDSMELTNING AV YTAN HOS ETT METALLEMNE

• Main Authors: 6)V N MATYAKH, 5)A E VORONIN, 3)N A TULIN, 14)G N KUZMENKO, 9)K S TOLSTOPYATOV, 8)G F TORKHOV, 12)N G BOBOVNIKOV, 4)I S PRYANISHNIKOV, 11)P V GUBIN, 7)L R TAGER, 2)J V LATASH, 1)B E PATON, 10)N V REIDA, 13)M N BIRJUKOV
• Format: Patent
• Language: Swedish
• Published: 29.10.1984
• Subjects: CASTING; CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES; CHEMICAL SURFACE TREATMENT; CHEMISTRY; CLEANING OR DEGREASING OF METALLIC MATERIAL BY CHEMICALMETHODS OTHER THAN ELECTROLYSIS; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATIONOR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; COATING MATERIAL WITH METALLIC MATERIAL; COATING METALLIC MATERIAL; DIFFUSION TREATMENT OF METALLIC MATERIAL; FERROUS OR NON-FERROUS ALLOYS; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION INGENERAL; METALLURGY; PERFORMING OPERATIONS; POWDER METALLURGY; PRETREATMENT OF RAW MATERIALS; PRODUCTION AND REFINING OF METALS; TRANSPORTING; TREATMENT OF ALLOYS OR NON-FERROUS METALS

A molten bath of slag is formed in a vessel, and the bottom end of the workpiece is immersed in the bath, but only to a depth corresp. with the depth(t) of the surface layer which is to be removed from the bottom end of the workpiece. Electroslag remelting is then used to remove the surface layer to depth(t). The workpiece is pref. lowered gradually into the molten slag until the required depth has been removed. One pref. plant consists of a furnace or mould connected to one pole of an electric power supply, the second pole of the latter being connected to the workpiece so the surface of the latter melts. The molten metal thus obtd. may be drawn out of the bottom of the furnace in a manner similar to conventional electroslag melting. Very large components can be provided with smooth, clean surfaces free from cracks or fissures without the loss of a large amt. of metal; and the unsound hot tops of very large ingots may be completely removed.