SU927461A1 - Powder wire charge - Google Patents

Description

(5) CHARGE POWDER WIRE

The invention relates to welding materials for arc welding, in particular to flux cored wires for welding in all spatial positions in a carbon dioxide atmosphere. Known charge 1P, containing successive components, weight. % Rutile concentrate 53, Manganese dioxide, Silica: 3 Sodium oxide 3 Magnesite6 Ferromanganese 13; Ferrosilicium12 Iron powder Remaining When welding using a known mixture, a significant amount of oxygen (0.09%) and hydrogen is contained in the weld metal, which reduces the resistance of the WBOB metal to the formation of hot cracks, and the impact strength of the weld metal is particularly sharply reduced in the low temperature. In order to reduce liquid slag during welding in various emergency situations, a significant amount of erosilicon is introduced into the wire. Silicon content in the deposited metal reaches 0.8%. This amount of silicon negatively affects the plastic characteristics of the weld metal. In order to increase productivity with & arch-technological properties of the wire and increase the mechanical properties of the weld metal, the charge is additional. It contains sodium silicate, magnesite and electrocorundum in the following ratio of charge components, wt. %: Rutile concentrate 20-53 Ferromanganese 10-22,8 Ferrosilicon1,3-6 Sodium silicofluoride 1-5 Magnesite1,3-10 Electrocorundum 1.6-7.5 Iron powder The rest :: .. 9 Powder wire with the offered charge allows It does not produce welding in the ceiling, vertical, horizontal on the vertical plane and the lower position. Welding can be performed with direct current of reverse polarity. Powder wire has excellent welding and technological properties, provides stable arc burning, good formation of weld metal, slight spatter of electrode metal, easy slag crust separation, high productivity of the welding process, high mechanical properties of the weld metal. The seams contain a small amount of gases, which is determined by the composition and ratio of the components of the mixture. The weld metal is distinguished by high plastic properties. PRI me R 1. Wire for welding in all spatial positions (ceiling, vertical, inclined bottom) .- Wire diameter 1.6 mm. The steel sheath is based on the total weight of the wire (sheath composition: C - 0.05-0.08, Mp 0.20-0.30, Si - (traces) 0.12, S - up to 0.030 ;, P - to 0.030%). Table 1 presents the composition of the wire core, weight. % Powder wire provides excellent formation of seams in all spatial positions. The productivity of the welding process when using the proposed charge increases 1-fold, compared to the American cored wire (known). The weld metal is distinguished by high mechanical properties (Table +), high resistance to hot cracks, low gas content in the weld metal (Table 5). High performance is obtained due to the composition and ratio of the components of the charge. A decrease in the content of the core components of the wire to values lower than those given in the example is accompanied by a deterioration in the formation of the weld metal, its mechanical properties decrease, and the content of gases increases. An increase in the content of the core components to values that are above the upper limit, accompanied by an increase in the sputtering of the electrode metal, decreases the productivity of the welding process, and results in the formation of welds. PRI mme R 2. Powder wire for welding horizontal seams on a vertical plane {vertical seams of humps of vessels, converters; , seams in the lower position. Wire diameter 2.2 mm. The sheath is 80 "of the total weight of the wire. In tab. 2 shows the composition of the core wire weight. . The wire produces perfectly formed seams with high mechanical properties:; Au. The productivity of the welding process in comparison with the electrodes increases by 5-6 times. The results obtained are achieved on wires whose core composition is within the limits specified in the example. A decrease in the content of constituents to quantities lower than the lower limit leads to a decrease in the mechanical properties (Table 4). The resistance of the weld metal to hot cracks is reduced, and metal is seen flowing down when welding horizontal welds on a vertical plane. When the contents of the components are higher than indicated in the example, when welding horizontal seams when making the closing layer, an undercut is observed, the spattering of the electrode material increases, and the formation of the weld metal deteriorates. PRI me R 3. Powder wire for welding in the lower position. Wire diameter 2.5 mm. The sheath is J0% of the total wire weight. In tab. 3 shows the composition of the core wire weight. % The wire provides excellent formation of metal seams in the lower position. The productivity of the surfacing process reaches 15 kg / h. Linear welding speeds of fillet welds, depending on the leg of the seam, are 50-100 m / h. The weld metal is distinguished by high mechanical properties (Table 4), high resistance to hot cracks. High results were obtained when using 59 wires, the composition of the core of which is within the limits indicated above. A decrease in the content of components below the lower limit is accompanied by a deterioration in the formation, a decrease in productivity. The increase in the components to quantities greater than the specified upper limit is accompanied by a deterioration in the hygienic characteristics of the wire, an increase in splashing, and a decrease in the plastic characteristics of the weld metal. “. In tab. h shows the mechanical properties of the weld metal, made by various welding materials, Table. 5 shows the content of gases in the weld metal. Table L Content of mate rial composition, weight. OptiMlimitant Rutile concentrate 3535, 2-53.0 MAG Magnesite burned, 92, i {-7.50 Ny 5.23.0-7.50 Electrocorundum Fluorosilicate 2, it1.8-3.0 sodium 20,217.6-22.8 Ferromanganese 2,61.8-3.50 Ferrosylation 37.2-2.7 Iron powder Table Content of the material Composition of fishing, weight. % Optima-I Limit I Rutile Concentrate .5 30.0-, Omt Magnesite Burnt 2 .0-10.0 Electrocorundum 2.5-7.5 Fluorophosphorus 1,5-5.0 Sodium Ferromanganese 17.5-22.5 2.0-6-6 Ferrosilicon Iron poro23. 3 t.5-2.0 shock Table 3 Composition Content of materials. wt.%;: - Opti-I Predel A {lEJyo L 'more Rutile con 33 .2 .5 centrate Magnesite obozh 5 .6 1.3-10.0 .1 1.6-6.7 Electrocorundum Fluorofluoride 2,1 1.0-3.3 sodium Ferromanganese 12.5 10.0-15.0 2.0 1.30-2,60 Ferrosilicon 0.5 6ft.8-15.9 Iron Powder

The lower limit of the content of com200 Fonentov

The optimal content is 1.6 200

Upper

200 limit

American wire (izvest1, 6, 200 on)

2 Gori-Bottom

Stzsp zone - limit

20mm) tal-kompo350

Nano nentsy

on

vertical - Optimal co2, 2 350 flat-bone

Upper limit

lower limit

Optimal co2, 5 hold

The upper limit of the content of components

11.5-12.5 5.2-5.8 3.2-, 2

29.5

Tta

12.0

5.5

 1.0-17.76, -11.7 5.7-8.5 2355.0 30.2 fsTST 9.07.1

J0.1-n.33, B-k, 2 3.5-3.7 23 60, 22.5 10.7 A, 03.6

7.5-9.0 2.5-3.0 0.8-0.8 23 65.0 20.5, 70.8

10.5-11.2 .5-5.3 2.0-3.5 27 53.2 28.5 ioTF 4.92.7

12.5-13.8 6.5-7.0 3.5.-4.0 27 57.0 29.2 13.1 6.73.7

3.8-10.24.2-5.01.8-3.0 62.0 24.5 10.0 k, 62,

12.1-12.44.5-4.83.0-4.2 50.2 29.5 12.2 4.73.6

13.5-14.1 6.5-7.1 3.5-4.5 3254.3 29.8 14.3 TTBM

10.5-11.1 4.0-4.3 2.8-4.4 60.0 23.0 Go78CT T

(

10 Table 5

Claims (1)

Claim Powder wire charge, mainly for welding low-carbon and low alloy steels ₍ in carbon dioxide in all spatial positions, containing rutile concentrate, ferromanganese, ferrosilicon, iron powder, characterized in that, in order to increase the productivity of welding and technological properties of the wire and improve mechanical properties the weld metal, the mixture additionally contains silicon fluoride VNIIIPI Order 3082/17 sodium chloride, magnesite and electrocorundum in the following ratio ponents of the charge, weight. • Rutile concentrate 20-53 Ferromanganese 10-22.8 Ferrosilicon 1.3-6 Sodium silicofluoride 1-5 Magnesite 1,3-y Electrocorundum 1.6-7.5 Iron powder Rest