SU598717A1 - Flux for machinised welding - Google Patents

Description

(54)

FLUX FOR MECHANIZED WELDING

one

The invention relates to welding materials and is intended for arc welding of predominantly high-alloyed austenitic grade stainless steels.

Known flux for mechanized welding of high-alloy steels, containing the following components, wt.%

Silica Oxide Aluminum Oxide Calcium Oxide

Magnesium oxide Calcium fluoride Zirconia

The composition of the flux also introduced the oxide of the stern. Known flux does not provide defect-free, stably austenitic welds without cracks.

The purpose of the invention is to improve the quality of the weld metal.

For this purpose, manganese oxide is introduced into the composition of the flux in the following ratio of components, wt.%:

Silica 10-20

Aluminum oxide 14-19

Calcium Oxide Manganese Oxide Magnesium Oxide Zirconium Dioxide Calcium Fluoride

In order to reduce the oxidation of the alloying components of the welding wire and base metal used, the following components were added to the flux composition together or separately, wt%:

Titanium dioxide Iron oxides. Molybdenum Oxide Tungsten Oxide Potassium Oxide Chromium Oxide

The proposed flux provides the minimum transition of silicon LE flux into the weld when welding austenitic nitrogen-containing stainless steels,

Claims (2)

Oxides of titanium, chromium, molybdenum, tungsten and iron are introduced into the flux as well to prevent the welding metal from being deposited with hydrogen, carbon, sulfur and phosphorus. Potassium oxide can be hydrated with sodium oxide and introduced to enhance the technological properties of the flux. Iron oxides were introduced as iron oxide O, iron oxide FeO and iron oxide Te 304-. The silicon oxide content is selected taking into account its effect on reducing the density of the donkey, as well as preventing its reduction and transition to the seam. The decrease in slag density favorably affects the removal of nonmetallic inclusions from the weld at the center. In addition, replacing part of the oxide of the cream with zirconia with simultaneous introduction of manganese oxides suppresses the transition of silicon from welding austenitic, high manganese steels, which also ensures the production of cracks. The content of calcium oxides, magnesium, calcium fluoride is chosen to ensure the basicity of the flux, which has a positive effect on the desulfurization of the weld metal, thereby increasing their crack resistance. It is reasonable that the ratio of the weight part of zirconium dioxide to the weight part of silicon oxide in the flux is within 0, 5-2, The proposed flux, together with a wire of the grade OOOH19N18G10AM4, gives the following chemical composition of the weld metal on steel OOOX20H.6AG6 wt.% С 0.03; gi 0.1; Mr 8; Cr 18, i5.8j Mo 1.7; No 0,24 / B weld metal there are no pores, cracks. The chemical composition depends little on the modes of welding. Formula of Invention 1. Flux for mechanized welding, property | about high-alloyed stainless steel and azo-containing steels, containing oxide / oxide, nitrous oxide, calcium oxide, magnesium oxide, calcium fluoride, zirconium oxide, because in order to increase the quality of the weld metal, it contains manganese oxide in the following the ratio of components, wt.%: Silicon oxide Alkimine oxide Calcium oxide Manganese oxide Magnesium oxide 12-16 Zirconia 10-20 Calcium fluoride Balance 2. Flux POP.1, distinguished by the fact that, in order to reduce the oxidation of the alloying components of the welding wire and the new metal, the following fluxes were introduced into the flux together or separately, wt.%: Titanium dioxide Ferric oxides Molybdenum oxide Tungsten oxide Potassium oxide Oxide chrome