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Vacuum Furnace Rs 2. Scarlet Alloys Wire. Call Related Categories. An example of the use of the electro-slag refined ESR steel technique is the L30 tank gun. From Wikipedia, the free encyclopedia.

The furnace

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  5. Arc slag remelting for high strength steel & various alloys.

Bessemer process Open hearth furnace Electric arc furnace Basic oxygen process. Electro-slag remelting Vacuum arc remelting Argon oxygen decarburization. It is well known as a refining method used mainly in the steel and superalloy industry. The main goal of this process is the inclusion, removal, desulphurization and the adjustment of a uniform microstructure.

The fundamentals of this process are described elsewhere and are not further outlined in this paper. Many alloys contain elements like aluminum and titanium which, when heated, react with oxygen to form oxides. Oxides are detrimental to premium quality melted alloys. Premium grade alloys, such as those required by the aerospace, energy, medical and automotive industries, can be protected from the atmosphere and residuals by melting inside a vacuum container.

This approach gives the metals producer more control over alloy chemistry. The result is a cleaner, more uniform product with the superior properties required for critical service applications.

Electroslag Remelting ESR is a secondary refining process used to further refine many alloys. As a feedstock it uses consumable electrodes produced either by VIM or conventional air melting. Conventional ESR improves the microstructure and cleanliness of the VIM, or arc melted alloy, by removing inclusions as the metal passes through the slag and controlling the solidification rate in the refined metal ingot to minimize chemical segregation. Melting through the slag permits very close compositional control.

A more recent advancement is Pressurized ESR P-ESR furnaces, which have the ability to melt alloys under nitrogen pressures of several atmospheres and produce very high nitrogen steel compositions that cannot be achieved via standard air melting techniques.

This capability allows the manufacture of new and novel high-nitrogen alloys with unique mechanical properties. With pressure ESR the metal is melted under elevated nitrogen pressure, permitting the production of alloys with high levels of nitrogen. With this design, the pressure above the slag can be increased to levels that are significantly above normal atmospheric pressure levels, enabling much higher levels of nitrogen to be achieved.