SU559802A1 - Electrode coating - Google Patents

Description

This is achieved by the fact that the coating composition of the electrode contains weight. %: marble 30-80; fluorspar 5-20; dacite 1 -10; ferrosilicon 1 -10; ferrotitanium 1 -15; manganese I-10 and sodium fluoride 1 -10 are injected; shale is Estonian combustible or zirconia in an amount of 1 -10 weight. % of each. or both of these substances at the same time in the amount of 0.5-5 weight. % of each. In addition, in order to ensure the possibility of welding low-alloy steels, the weight additionally is added to the composition of the coating. %: chromium 1 -10; molybdenum 1 -10 and vanadium 0.5-5. In tab. 1 shows the compositions of the coatings. Table 1

The technological process of manufacturing the proposed electrodes does not differ from that adopted in industry and is produced on the same equipment (mixers, calcining furnaces, etc.) and under the same conditions.

The determination of slag separability was carried out according to a specially developed technique. It was found that this indicator for known electrodes is two to three times more than that of the proposed ones.

The described composition of the coating ensures the production of slags from KTP on the order of (23- -30) X10. This ensures easy slag separability from the surface of the weld, including from the root layers. Easy slag separability creates the possibility of welding into narrow, so-called slit-like cuts.

as the process of manufacturing serial electrodes UONI-13/55 and TsL-20-67. In tab. 2 shows the welding and technological properties of the obtained coatings. In tab. Figure 3 shows the mechanical characteristics of the weld metal.

table 2

Table 3

which is excluded when using existing brands of electrodes. According to preliminary data, welding in slit-like grooves at the expense of a smaller volume of deposited metal and reduction in labor costs for the removal of slag will provide an increase in the productivity of labor by 10–15% and a saving of materials by 15–20%.

Claims (2)

1. Electrode coating for manual arc welding containing marble, fluoric spar, dacite, ferrosilicon, ferrotitanium, manganese and sodium fluoride, THAT and hr: i because, in order to improve slag separability, it additionally contains material selected from the group: Estonian shale, zirconium dioxide in the following ratio components weight. %: Material selected from the group: Estonian slate zirconium dioxide 1-10 Marble30-80 Fluorspar Dacite Ferrosilicon Ferrotitanium Manganese Sodium fluoride 2. Electrode coating is that, for the purpose of alloyed steels, its composition contains it, weight. %: chromium 1 -10, vanadium 0.5-5.