Комаров Артем об особенностях электрошлаковой сварки (eng)
Komarov Artem noted that the emergence of electroslag welding arose in Russia after the Paton Institute carried out in-depth research to improve electroslag welding.
Over time, many European countries and the United States began to use thick sections of steel as the best welding tool.
The electroslag welding process is an extension of arc welding, in which the co-production is made with molten slag, which melts the filler metal and the work surfaces to be welded.
The concept of electroslag welding:
The electroslag welding process is created by introducing an arc between the filler metal/electrode and the workpiece. The arc heats the flux and melts it to form slag. The arc is removed and the conductive slag is kept in a liquefied state, due to its resistance to the flow of electric current between the electrode and the work, molten slag remains between the electrode and the work.
The molten slag remains between the electrode and the workpiece. The pool of molten metal is protected by molten lava that travels across the entire cross section of the joint as welding progresses.
How it works:
Komarov Artem emphasized that the arc is ignited between the electrode and the joint floor with a piece of steel wool. Welding flux is added, which melts under the heat of the arc. The temperature of this molten slag bath is about 1650 degrees Celsius at the surface and 1930 degrees Celsius below the surface.
When a sufficiently thick layer of hot flux or molten slag is formed, the arc stops and the electric current passes through the conductive slag bath in the workpiece from the electric current. The conductive lava pool remains molten due to the resistance to electrical current between the electrode and the workpiece.
This amount of heat is sufficient to fuse the edges of the workpiece and the welding electrode. Liquid metal and hot base metal coming out of the welding electrode are collected in a bath under the slag bath and slowly freeze, forming a weld that connects two workpieces, summarized Artem Komarov.
