SU695786A1 - Welding flux - Google Patents

Description

(54) WELDING FLUX Ki on the root of the seam and, mixed with the flux deposited on the reverse side of the edges being welded, when melted, gives slag, which does not ensure good formation of the seam. As a result, the weld seam; Get with uneven with sags and burns. The aim of the invention is the creation of welding flux, which ensures the high-quality formation of the root of heat-resistant steels. The intact is achieved by the fact that the flux additionally contains sodium silicate and alkali metal fluoride selected from the group lithium fluoride, sodium fluoride in the following ratio of components, wt.%: .. Fluorspar 10-14 Silicon dioxide 10-1- 3 Ferromanganese 1-2 Ferrosilicon 1-2 Titanium Dioxide 8-10 Hematite 2-4 Manganese ore 10-12 Calcium carbonate 10-16 Sodium silicate 20-30 Alkali metal fluoride, selected from the group: sodium fluoride, lithium fluoride 8-15 V As an example of Isobenta, you can give the composition of the flux, which is wt.%: Fluor spar 13 Silicon dioxide 12 Dioxide, titanium 10 Manganese ore 10 Calcium carbonate 12 Hematite 4 Sodium silicate 28 Ferrosilicon1 Ferromanganese2 Lithium fluoride 8 To obtain a paste, the flux of this remains is mixed on liquid glass. Flux paste was applied to reverse torsion and 0 152 mm tube-like pipes made of 8 mm thick ASM steel. thickness of pasta layer 0.5-0.1 mm, width 5-6 mm. The pipes were assembled with a clearance of 1.5 mm. Welding was performed by electrodes of the TsL-17 brand (03 mm) in a current of 95-100 A and voltage of 1822 V. Simultaneously, similar samples were welded using the known flux-paste. The mechanical properties of the compounds obtained as a result of comparative tests are presented in the table.

From the table it follows that the use of flux of the proposed composition improves the plastic properties of the welded joint, and the strength properties with gans are more stable.

As another example, consider the composition of the flux containing wt.%:

 Plavi: ground spar 13 Titdine dioxide 10 Dioxide 12 Manganese ore sulphate Calcium carbonate 12 Hematite4

Sodium silicate 22

Ferrosilicon 1 Ferromanganese2

Sodium fluoride 14

. Welding was performed on the same materials and in the same modes as in the first example, only sodium fluoride was used instead of lithium fluoride.

The use of flux of the proposed composition allows to significantly reduce labor costs and to obtain an economic effect.

Claims (2)

Invention Formula Welding flux, mainly for the formation of the root of the seam during arc welding of heat-resistant steels containing fluorspar, silicon dioxide, titanium dioxide. manganese ore, calcium carbonate hematite, ferromanganese, ferrosilicon, characterized in that, in order to improve the quality of formation of the root of the seam, the flux additionally contains sodium silicate and alkali metal fluoride selected from the group: sodium fluoride, lithium fluoride in the following ratio of flux components wt.%: Fluor spar 10-14 Silicon Dioxide 10-13 Titanium Dioxide 8-10 Manganese Ore 10-12 Calcium Carbonate 10-16 Hematite2-4 Ferrs Larganite1-2 Ferrosilicon1-2 Sodium silicate 20-30 Alkali metal fluoride selected from the group: fluorine pure sodium, lithium fluoride8-15 Sources of information taken into account during the examination 1. USSR author's certificate 23234, cl. at 23 K 35/362 ,. 07.70. 2. Authors certificate USSR 497118, cl. B 23 K 35/362, 06.74.