SU340306A1

SU340306A1 - Method of electroslag remelting

Info

Publication number: SU340306A1
Application number: SU691372105A
Authority: SU
Inventors: Б.Е. Патон; Б.И. Медовар; Ю.В. Латаш; В.М. Баглай
Original assignee: Институт Электросварки Имени Е.О.Патона
Priority date: 1969-11-03
Filing date: 1969-11-03
Publication date: 1980-06-25

Description

Изобретение относится к спеиэлектрометаллургии.The invention relates to special electrometallurgy.

Известны способы получения металлических отливок, основанные на электрошлаковом переплаве расходуемых электродов в охлаждаемых изложницах (кокилях). ⁵Эти способы обладают тем преимуществом, что обеспечивают получение плотных, однородных, и чистых по содержанию неметаллических включений и других вредных примесей отливок. ¹⁰ Known methods for producing metal castings based on electroslag remelting of consumable electrodes in cooled molds (chill molds). ⁵ These methods have the advantage that they provide dense, homogeneous, and pure in content non-metallic inclusions and other harmful impurities of the castings. ¹⁰

Однако известные способы позволяют подучать только' отливки сравнительно простой формы, имеющие прямолинейную ось симметрии (цилиндрические, призматические и конические слитки, заготовки прокатных валков с переменным диаметром по высоте и т. п.). Вместе с тем для ряда отраслей техники требуются высококачественные отливки более сложной формы, имеющие криволинейную ось. В этом случае известные способы электрошлакового переплава расходуемых электродов практически не могут быть применены.However, the known methods make it possible to learn only castings of a relatively simple form having a straight axis of symmetry (cylindrical, prismatic and conical ingots, blanks of rolling rolls with a variable diameter in height, etc.). At the same time, a number of branches of technology require high-quality castings of a more complex shape, having a curved axis. In this case, the known methods of electroslag remelting of consumable electrodes can hardly be applied.

Пель изобретения - обеспечить возможность изготовления фасонных отливок сложной формы, имеющих криволинейную ось симметрии.The aim of the invention is to provide the possibility of manufacturing shaped castings of complex shape having a curvilinear axis of symmetry.

Это достигается,согласно изобретению, применением такого способа электрошлакового переплава, при котором по мере наплавления металла отливки производят наклон (кантовку) охлаждаемого кокиля, в котором ведется переплав, При этом наклон (кантовку) кокиля ведут так, чтобы горизонтальная поверхность металлической ванны по ходу плавки совпадала с нормальными сечениями полости кокиля.This is achieved, according to the invention, by the use of such an electroslag remelting method, in which, as the casting metal is cast, a tilt (canting) of the chilled chill, in which the remelting is carried out, is made. coincided with normal sections of the chill cavity.

Предлагаемый способ может быть реализован при применении расходуемых электродов, перемещаемых па плавке относи -. тельно кокиля или неперемещаемых от— носительно кокиля, или при комбинировании неперемещаемых и перемещаемых электродов. Расходуемый электрод может быть прямолинейным, может повторять форму отливки ЭШП ипи может быть так изогнут^The proposed method can be implemented by the use of consumable electrodes, moved by melting relative to -. for chill molds or non-movable ones relative to chill molds, or when combining non-movable and movable electrodes. The consumable electrode can be rectilinear, it can repeat the shape of the EWP casting, or it can be so bent ^

При изготовлении П-образной отливки производится наклон кокиля на 180°, т. е. полная кантовка его. В общем случае угол наклона кокиля зависит от формы получаемой отливки. Так, например, для получения Г-образной отливки наклон кокиля должен составлять 90°.In the manufacture of a U-shaped casting, the chill mold is tilted by 180 °, i.e., its full canting. In the general case, the angle of inclination of the chill mold depends on the shape of the casting obtained. So, for example, to obtain a L-shaped casting, the slope of the chill mold must be 90 °.

Claims

This invention relates to special metallurgy. Methods are known for producing metal castings, based on electroslag remelting, for decomposing electrodes in cooled molds (chill molds). These methods have the advantage of providing dense, uniform, and pure in content non-metallic inclusions and other harmful impurities castings. However, the known methods allow to obtain only castings of a relatively simple form, having a rectilinear axis of symmetry (cylindrical, prismatic and conical ingots, billets of rolls with a variable diameter in height, etc.). At the same time, for a number of branches of engineering, high-quality castings of a more complex shape with a curvilinear axis are required. In this case, the known methods of electroslag remelting of consumable electrodes cannot be guaactically applied. The invention of the invention is to enable the manufacture of shaped castings of complex shape with a curvilinear axis of symmetry. This is achieved, according to the invention, by the use of such an electroslag remelting method, in which, as the metal of the casting is deposited, the inclination (churning) of the cooled chill mold is carried out, in which the remelting takes place. In this case, the tilting (turning) of the chill mold is carried out in such a way that the horizontal surface of the metal bath along the smelting process coincides with the normal sections of the chill mold cavity. The proposed method can be implemented with the use of consumable electrodes, moved by smelting -. warm chill or unmovable relative to a cocyp, or when combining unmovable and movable electrodes. The consumable electrode can be rectilinear, can repeat the shape of a Casting-ESR, or it can be so bent so that, as far as oplavpei is concerned, it can freely enter the chill mold in the center of the normal section of the mold of the mold. The consumable electrode, before the smooth one, is mounted in the chill mold and fixed motionless relative to the chill mold. The seed is installed on a pallet to which the current supplying the cable is connected. A current is supplied to the consumable electrode with a cable. Dp8 the beginning of the process according to the proposed method, a bath of liquid slag in a chill mold can be created by siphon bathing x pre-molten slag. Maintenance of the smelting process is ensured by the entry of solid flux into the slag bath from the gap between the electrodynamics and the wall of the furnace. In the manufacture of P-shaped casting, the chill mold is inclined by 180, i.e. it is full of turning. In the general case, the dip, the inclination of the chill mold depends on the shape of the resulting casting. For example, to obtain an L-shaped casting, the inclination of the chill mold should be EO. The invention The method of electroslag remelting of sprawling electrodes in a cooled mold of a complex configuration, characterized in that, in order to obtain axial crystallization castings, during the remelting process the mold is contrasted so that at any time of melting the horizontal surface of the metal bath coincides with the normal section of the crystallizer.