Method and apparatus for electroslag casting of metals

Details Method and apparatus for electroslag casting of metals Method and apparatus for electroslag casting of metals

H - Electricity

05

B

307/39

H05B 7/20 (2006.01) F27B 9/00 (2006.01)

Patent

CA 1132640

METHOD AND APPARATUS FOR ELECTROSLAG CASTING OF METALS ABSTRACT OF THE DISCLOSURE An apparatus comprises a cooled mould mounted on a bottom plate and at least two consumable electrodes positioned so that their melting ends are at different levels relative to the bottom plate. The electrodes are connected to respective termi- nals of the secondary winding of a single-phase transformer and the bottom plate is connected to one of these terminals, with the electrode having a melting end at a higher level, being connected to the same terminal as the bottom plate. The electro- des are melted by passing an operating current,first through the electrode with the melting end being at a lower level to the bottom plate and then by passing the operating current from one electrode to the other, respectively, forming a portion of the casting, having a smaller cross-section, and then a portion of the casting, having a larger cross-section. Thus the present invention is especially well suited for manufacturing workpieces for vital parts such as connecting rods, piston rods, valves for ship engines, etc.

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