SU912458A1 - Electrode coating composition - Google Patents

Description

(54) COMPOSITION OF ELECTRODE COATING

The invention relates to welding, B in particular, to a welding material, but to the composition of the electrode coating. Various electrode coatings for copper welding are known, for example, Co tav, containing the following components, weight. %: MelV.-1O Manganese34-36 Fluorspar 24-26 Feldspar 7-10111 However, the electrode coating provides insufficient electrical conductivity of the weld metal. The closest in composition to the VL electrode coating containing the following components, wt. 6: Marble10 ... 15 Fluorspar 10 ... 15 Sodium fluoride 20 ... ZO Bor1.5 ... 2.5 Aluminum powder4, 5 ... 5.0 Zirconium concentrate6 ... 8. Oxide of copper31 ... 35 The disadvantage of this electrode was e-gc increased tendency of welds to form pores. The purpose of the invention is to improve the quality of the weld metal during copper welding (small cKdHOHHocTb to the formation of pores and high mechanical properties). This goal is achieved by the fact that the electrode coating containing marble, ppavik spar, sodium fluoride, copper oxide, aluminum powder, additionally contains graphite, titanium powder, ferrosilicon, ferromanganese and copper, with the following ratio of components, weight. %: 8-16 Fluor spar 16-30 Sodium fluoride 16-30 Oxide 3-7 Aluminum o, 5-1.5 G raffit 0.5-1.5 0.5-2.5 Ferrosilicon. 0.5-4 Ferromanganese 3-9 Copper Ostand Marble Such a complex deoxidation of the welding bath and alloying of the weld metal, on the one hand, prevents the interaction of hydrogen and oxygen in the weld pool, and thus provides for the formation of welds without pores, on the other hand, seams with high mechanical properties. In addition, the high resistance of the seams against the formation of pores in this electrode coating, in contrast to the known TaKJ is achieved by choosing the optimal concentration of marble in the coating, namely in the amount of 20 ... 30%. The introduction of copper powder into the coating allows welding in forced modes (increased amperage). The content of the remaining components is taken in the ratio: Fluorspar8 ... 16% Sodium fluoride 16 ... 30% Copper oxide 16 ... 30% Aluminum powder 3 ... 7% Electrodes with this composition are coated. Tin, in contrast to the known electrodes for copper welding, is manufacturable for manufacturing lenny and can be produced under conditions of serial production. Examples of a series of samples of this electrode coating are given in the table. For electrode rods

Marble

electrode - 3Q 23 ny

Cryo graphite

., ,ABOUT . J-, talpic

Titanium l about

powder

Ferroshti-Q 0 tions

Ferromarg- 5.0.0 nt &

12.5

47.5 S4 iyopitsyza meana wire brand MT according to GOST 2112-71 5 mm. As a link to the first. applied stanaart sodium glass in the amount of 22% to the dry mixture. Glass characteristics: density 1.49; viscosity 1500 C; module 2.8. The technopogicity of the manufacture of electrodes was evaluated during the whole cycle of production, the pressure testing — drying) and — calcining. When testing the electrodes, the following welding-technological properties were determined :, arc stability, degree of spraying, formation, weld, slag separability, deposition rate, and the presence of pores and friction in oanoi multi-layer welds. In addition, butt joints FROM copper, 1300x 150x12 plates with V-groove edges and opening angle were welded without preheating. Type 11 gaps were cut out according to GOST 6996-66 to assess mechanical properties. Multiple-layer cladding was also carried out according to the usual kyudodika technique for chemical analysis of the weld metal. Tests have shown that the electrodes with the proposed coating can be obtained with satisfactory welding and technological properties. The coefficient on the melting of the electrodes with the proposed coating is 15-19 g / A h, i.e. more than 1.5 times higher than that of the Komsomol-00.,

Risky Tech 16 16

21 nic

Nitrate me10.

28 5.5 di h

Aluminum 11.

 zo powder

12.

Boron amorphous

Zircon 13. concentrate

Silicon

4. copper 5.

Field

spar

 .

Presence since.

not

not

16. In a multilayer seam 7.

Mechanical properties meta pas seam.

Note. The quality of the seams when welding with electromy Komsomolets - the OS is not stable.

2. The data for the electrodes of Komsomts ets-YuO are given according to their passports.

Prooopenie table

28

21

28 5.5

34 5.0

1.5 7.0

25 15

not

not

Claims (2)

many flats 7; .91 As a video from the table, all tested compositions of the underlying electrode coating as compared to the known ones provide a higher quality of the seam (making seams without pores and cracks with high mechanical properties). The coating also provides low doping of the seam and, thus, its high electrical conductance. Optimal welding and technological properties provide electrode coating II composition. New electrodes with the proposed coating can be widely used to replace the Komsomolets-OO brand electrodes in various industries in the manufacture and repair of welded copper structures, as well as in welding copper with steel. In comparison with commercially manufactured Komsomolets-OO electrodes, the proposed electrodes have a higher welding process efficiency, which is provided by an increased deposition rate and a greater penetration depth. In addition to toro, there is no accompanying heating and the preheating temperature of the welded wire is lower. divided, respectively, less consumption of combustible gases; The quality of welding and, consequently, a drastic reduction in scrap are ensured. The invention The composition of the electrode coating, mainly for welding copper, containing marble, fluorspar, sodium fluoride, cuprous oxide and aluminum, is due to the fact that, in order to improve the quality of the weld metal, it is added; It contains graphite, titanium, ferrosilicon, ferromanganese and copper, with a barely low ratio of components, weight. Fluorite 8-16 Sodium fluoride 16-30 Copper oxide 16-ZO Aluminum 3-7 Graphite 0.5-1.5 0.5-1.5 Ferrosilicon Oh, 5-2.5 Ferromanganese Marble Else Information sources taken in attention during examination 1. USSR author's certificate No. 282554, Cl, B 23 K 35/365, 1969. 2. USSR author's certificate number 562402, cl. 23 K 35/365, 1975. (prototype), ..