SU447237A1 - Electrode coating - Google Patents

Description

one

The invention relates to handhelds responsible structures in position on the

Known electrode coating arc welding of low carbon and low alloyed holding the following components

Zirconium dioxide

Staurolite

Mica

Cellulose

Marble

Fluorspar

Quartz sand

Ferromanganese

Ferrosilicon

Electrodes with the proposed coating, due to the specific properties of the coating, require in manufacturing careful observance of the narrow and rigid range of possible values of crimping, drying, and especially puncture modes, which dramatically impairs their manufacturability in mass industrial production. In addition, electrodes with a known coating tend to form pores when welding at high forced modes, as a result of which the productivity of welding works decreases.

To increase the quality of the welded joint, the manufacturability and quality of manufacturing electrodes, kaolin in an amount of 0.5-3%, ferrotitanium in an amount of 5-30% are introduced into the coating, and the staurolite is replaced by a staurolite concentrate in an amount of 1-6% in the following ratio of other components %:

Marble25-55

Fluorspar 3-20

Quartz sand I-12

Zirconia 3-25

Mica1-15

Ferromanganese1-15

Ferrosilicon1-20

The coating composition can contain iron powder up to 40% and rutile concentrate in the amount of 1-5%, and instead of quartz sand and partially zirconium dioxide zirconium concentrate can be added. Electrodes with such a coating composition have a higher plasticity of the coating mass and provide a high-quality coating in a much wider range of possible values of the modes of drying and calcining them. The introduction of kaolin increases the plasticity of the coating mass, provides a high-quality coating in a much wider range of modes

drying and calcining them. The introduction of ferrotitanium increases the arc burning power on alternating current, facilitates the welding process in all spatial positions, improves the slag crust separability, allows high-quality welding to be performed at high, forced modes, and increases the durability of the weld metal against pore formation. The replacement of staurolite by staurolite concentrate is due to the fact that B nowadays only staurolite concentrate is supplied by industry. The weld has no defects: pores, cracks, slag inclusions and undercuts.

Subject invention

Claims (4)

1. Electrode coating for manual arc welding of low carbon, medium carbon and low carbon steels containing staurolite, marble, fluorspar, quartz sand, zirconium dioxide, mica, ferromanganese and ferrosilicon, characterized in that, in order to improve the quality of the welded joint, the technology, in order to improve the quality of the welded joint, the technology is technologic, in order to improve the quality of the welded joint, the process technology. manufacturing quality, introduced 0.5-3%, ferrotitanium in 5-30%, and staurolite was introduced in a concentrate in the amount of the following ratio of remaining,%: Marble Fluorspar Quartz Sand Zirconia Mica Ferromanganese Ferrosilicon 2. The coating according to claim 1, characterized in that iron powder up to 40% can be added to its composition. 3. Coverage on PP. 1-2, characterized in that zirconium concentrate can be added to the coating composition instead of quartz sand and partially zirconia. 4. Coverage on PP. 1-3, characterized in that the chopped concentrate can be added to the coating in an amount of 1-5%.