SU387592A1

SU387592A1 - Method of electroslag smelting of tubestock

Info

Publication number: SU387592A1
Application number: SU701484687A
Authority: SU
Inventors: Б.И. Медовар; Г.А. Бойко; В.А. Ковалев; И.И. Кумыш; С.А. Форисенков; А.И. Шаврин; Е.И. Качанов; В.В. Кузьмин; Л.Я. Глускин; Ю.И. Звездин
Original assignee: Институт Электросварки Им.Е.О.Патона
Priority date: 1970-09-29
Filing date: 1970-09-29
Publication date: 1980-05-25

Description

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

Известен способ подогрева шлаковой и металлической ванн нерасходуемым электродом, например, во время наращивания или замены расходуемых металлических электродов в процессе электрошлакового переплава.A known method of heating slag and metal baths with a non-consumable electrode, for example, during the buildup or replacement of consumable metal electrodes in the process of electroslag remelting.

Однако для замены расходуемых электродов по данной технологии.необходимо определенное время. За этот промежуток времени неизбежны, во-первых, подстывание шлаковой ванны и, следовательно, пережимы в случае выплавки слитков, и, во-вторых, краевые несплавления при электрошлаковой выплавке заготовок патрубков на корпусах сосудов высокого давления.However, to replace consumable electrodes using this technology, a certain amount of time is required. During this period of time, firstly, undercoating of the slag bath and, consequently, over-presses in the case of ingot smelting are inevitable, and, secondly, edge non-melting during electroslag smelting of pipe blanks on pressure vessel bodies.

фитового электрода наводится шлаковая ванна, которая поддерживается в расплавленном состоянии за счет тока, происходящего в цепи графитовый полый электрод — шлак — корпус сосуда. После оплавления части корпуса сосуда, ограниченной формирующим устройством в зону плавки подается расходуемой металлический электрод. Нерасходуемый графитовый электрод выводится из шлаковой ваннц только после начала оплавления расходуемого электрода.the fit electrode induces a slag bath, which is maintained in the molten state due to the current flowing in the circuit of a hollow graphite electrode - slag - vessel body. After the part of the vessel body, limited by the forming device, is melted, a consumable metal electrode is supplied to the melting zone. Non-consumable graphite electrode is removed from the slag bath only after the beginning of the fusion of the consumable electrode.

Claims

The invention relates to special electrometallurgy. A known method of heating slag and metal baths with a non-consumable electrode, for example, during the buildup or replacement of consumable metal electrodes during an electrical remelting process. However, to replace consumable electrodes using this technology, a certain time is required. During this period of time, slag bath is inevitable, firstly, and the sludge bath is constricted in case of ingot smelting, and, secondly, marginal non-fusion during electroappak smelting of pipe blanks on high pressure vessel housings. The purpose of the invention is to improve the quality of fusion of the billet pipe with the vessel body. The proposed method differs in that the non-consumable electrode leads to the melting zone after the melting of a part of the consumable electrode, by the volume of the well of the pre-alloyed metal on the vessel body. The process is carried out in the following way. A slag bath is induced by a non-consumable hollow graphite electrode, which is maintained in a molten state due to the current flowing in the circuit of a graphite hollow electrode - slag - vessel body. After the part has been melted, the vessel body, which is limited by the background of the device, to the melting zone is supplied with a consumable metal electrode. Non-consumable graphite electrode is removed from the slag bath only after the beginning of the melting of the consumable electrode. Claim method Electroslag smelting of billet nozzles on high pressure vessel housings by remelting consumable electrode with preliminary melting of the vessel body part not consumed by electrode, limited by forming device, non-consumable electrode in order to improve the quality of alloying of the sleeve blank with vessel body. t from the melting zone after the melting of the part of the consumable electrode, equal to the well of the pre-alloyed metal on the shell UD