SU578175A1 - Electrode-coating composition - Google Patents

Description

one

The invention relates to the field of welding, in part, to the compositions of electrode coatings mainly for welding high-strength steels.

Known razlpchie compositions of electrode coatings, such as electrode coating, containing the following components, wt. %: Marble42-44

Fluke schiat26-28

Titanium dioxide 3-3,5

Carboruid green8-9

Ferromarganeans -

Ferromolybdenum3-4

Ferrotitanium 10-12

Bentonite1 -1.5 1.

The disadvantage of this compound is that it does not ensure sufficient strength of the weld metal.

The closest in composition is ;; electrode coating containing the following components, weight. %:

t 28-39 2-6 6-9 1-5 3-5

sky 5-9 1-3

Soda kalyipptstovaniya 1-2

Bentonite 1-3

The disadvantage of this electrode coating is that it does not provide sufficient resistance to crista. Cracking cracks and the viscosity of the metal of the schv.

Pel of the invention is to increase the resistance against crystallization of cracks; 1 the viscosity of the metal.

For this, the coating composition additionally contains copper, mlncoccalcgp, molybdenum, and yttrium aluminum, with the following ratio of components, weight. %:

Marble30-45

Fluorspar12-15

Ferrosylpy (75%) 2-10

Ferromarganeum6-9

Inkel3-6

Ferrotitai1-3

Metallic chrome 6-10

Rutile1-3

Copper1-2

Silikokaltsy2-6

Molybdeum1-3

Alu.Moattry (50%) 1-3

Soda Ash 1-2

Bentonite 1-3

Claims (2)

The introduction of molybdenum, copper, silicocalcium, and aluminum yttrium into the coating improves the irochnostnye properties of the weld metal while maintaining a sufficiently high plasticity and viscosity. Copper together with chromium, silicon, manganese increases the strength properties of the weld metal. Molybdenum, together with nickel, increases the ductility of the viscosity of an unlabeled metal. Silicocalcium, aluminum yttrium contribute to the deoxidation of the weld metal. Calcium, titanium and other metals. MofiTsIs | viruyu weld metal, warning 0 | the formation of hot cracks. Yttrium, together with manganese, exerts a de-sulfation, increasing the resistance of the metal against crystallization cracks. Deacidification with silicocalcium and aluminum yttrium reduces the amount of nonmetallic inclusions, globules of them and increases the ductility and viscosity of the weld metal. Electrodes were fabricated consisting of a rod made of wire EV-15 with a diameter of 4 mm and an electrode tip, the shee of which contained the indicated components in the following weight ratio, weight. %: Marble40 Fluorspar12 Ferrosilicon6 Ferromanganese.6 Nickel4 Ferrotitanium2 Chrome8 Rutile2 Silicone Local3 Copper1 Molybdenum1 Aluminium2 Soda Ash 1 Bentonite. Electro | Dy was produced by the method of Okunan with a weight coefficient of coating K, n 0.3 - 0.4. Welding of plates with a thickness of 20 mm from steel 27HGSND.MChL, deoxidized by silicocalcium and madifidine with titanium and yttrium, was carried out. Pb welded plates were made samples but GOST 69996-66. Tests have shown that the strength of the welds is not inferior to that of the base metal, and the ductility and viscosity is somewhat higher. This electrode coating provides high welding and technological properties of electrodes during welding with direct current of reverse polarity. The pan metal is high quality. The use of this electrode coating will allow to obtain high strength properties of the welds of the NPP to the welding of high-strength cold-resistant structural and cast steels. The invention The composition of the electrode coating mainly for welding high-strength steels containing marble, fluorspar, rutile, ferrosilicon, ferromanganese, nickel, ferrotitanium, metallic chromium, soda ash, bentonite, characterized in that, in order to increase the resistance to crystallization cracks and viscosity the weld metal, it additionally contains copper, silicocalcium, molybdenum and yttrium aluminum, with the following ratio of components, weight. %: Fluoro-spat12-15 Rutile1-3 Ferrosilicon2-10 Ferromanganese6-9 Nickel3-6 Ferrotitanium1-3 Metallic chromium6-10 Copper1-2 Spliced calcium2-6 Molybdenum1-3 Aluminum yttrium I-3 Soda calcined 1-2 Bentonite | 1-3. MpaiMOp Else Sources of information taken into account during the examination 1. Author's certificate of the USSR ° 361851, H 23 K 35, 365, 1973. 2. Author's certificate of the USSR X 256918, B 23 K 35/365. 1968.