The Composition of Electrode Coatings

The composition of electrode coatings

The composition of electrode coatings

Here are some compositions of electrode coatings.

Electrodes GMM 5 - rudnokislogo type, designed for welding low carbon steels. Electrodes such as E42 are permitted to make all sorts of important structures of the low-carbon steels, working with the application of static, dynamic and variable loads under normal, high and low temperatures. The rod electrode wire Sv-08 or CB-08A. The composition of coating OMM-5 is shown below (in percentage by weight).

Titanium (ilmenite) concentrate - 37%

Manganese ore (pyrolusite) - 21%

Feldspar - 13%

Ferromanganese - 20%

Starch - 9%

Titanium concentrate, ie, enriched ore consists mainly of the mineral ilmenite, which is a titanate of iron oxide FeO-TiO2. Manganese ore consists mainly of pyrolusite - peroxide of manganese. Feldspar - a natural mineral - aluminum silicate, sodium and potassium. Ferromanganese used for electrode coatings, on average, contains about 70% Mn. Titanium ore, manganese ore, feldspar, and liquid glass, fusing and interacting with the metal and ferro-manganese to form during welding slag. Titanium dioxide from titanium ore slag makes short.

The oxygen in the titanium oxide of iron ore and manganese ore, ferromanganese oxidizes with the release of considerable heat, heats and dilutes the slag makes boiling bath.

Alkali feldspar and silicate increase the stability of the arc. Manganese oxides in the slag reduces the loss of manganese bath. Ferromanganese deoxidized and alloyed weld metal to make up losses of manganese and raising some of its contents. Starch, decomposing to form a protective shell of gas around the arc. Here is the composition of the electrode coating CM-9-type rutile (by weight):

Rutile - 48

Magnesite - 5

Feldspar - 30

Ferromanganese - 15

Dextrin - 2

Rutile - a natural mineral consisting essentially of TiO2, magnesite - a mineral mainly of MgCO3; dextrin - a derivative of starch, is added in small quantities to enhance the plasticity obmazochnoy paste, making it easier to work obmazochnoy presses. Examples of fluorine-electrode-type calcium can serve as electrodes SSSI-13.

Mechanical properties of welded joints are characterized by high strength and toughness, such as UONI-13/45 UONI-13/55 and toughness of 25-30 kGm/sm2, which is an extremely high value and is far superior toughness values ​​of base metal.

The electrodes are recommended for welding in the down position, but it is also possible to weld in vertical and overhead positions. Constant current, the polarity is reversed, ie, plus on the electrode. When working on an alternating current is necessary to use an oscillator. There are varieties of electrodes of SSSI-13, which added to the plaster stronger ionizers, which gives the opportunity to work on alternating current without the oscillator. The quality of welding electrodes SSSI-13 should recognize the outstanding and mechanical properties of the weld and the weld metal obtained is often higher than the base metal.

See also:
Classification of covered electrodes
The composition of electrode coatings
Appointment of individual coating components SSSI-13
Manufacturing Electrodes
Welding Electrodes