J422 welding electrode

Abstract

The invention provides a J422 welding electrode, and belongs to the field of welding materials. A coating formula of the J422 welding electrode (with the diameter of 2.5-5 mm) comprises the following materials by weight percentage: 27-28% of reduction ilmenite, 14-15% of artificial rutile, 2-5% of ilmenite, 8-11% of mid-carbon ferromanganese, 3-7% of marble, 8-9% of mica, 5-9% of feldspar, 0-9% of white mud, 2-3% of high silicon earth, 0-14% of pyroxene, 10-12% of rich potassium pyroxene, 4-5% of sepiolite, 2-3% of bamboo powder, 1% of microcrystalline cellulose and 1% of starch. Compared with the prior art, the J422 welding electrode has excellent welding processing performance, particularly high arc blowing force; the J422 welding electrode is powerful, tall and straight; molten drops are in spray transfer states; fly detonation is fine and little; detached slag is whole-strip and automatically turns up; a slag crust is mazarine; a welding joint has outstanding metallic luster; welding fume is little; the restarting performance is good; additive substances such as the white mud, sepiolite clay, the feldspar, the mica, CMC (Carboxy Methylated Cellulose) and the microcrystalline cellulose are partially or wholly replaced by a new material with excellent wetting action, so that the content of K2O in potassium and sodium mixed water glass is reduced; and the production cost is lowered.

Description

Technical field [0001] The invention relates to a J422 electric welding electrode, which belongs to the field of welding materials and is mainly used for welding low-carbon steel structures and low-alloy steels with low strength grades. Background technique [0002] At present, there are many varieties of J422 welding electrodes on the market, the product quality is uneven, and the competition is fierce. The focus of the competition is mainly on: First, it is necessary to improve the comprehensive mechanical properties of the electrode welding deposited metal and improve its crack resistance to ensure welding engineering The quality is safe and reliable; the second is to improve the overall performance of the welding process, reduce dust damage, and be able to adapt to low-voltage welding equipment, feel soft and easy to operate; third, to improve labor productivity, reduce the cost of raw materials for the coating, and reduce product costs. The existing J422 welding electrode fo...

AI Technical Summary

Problems solved by technology

The existing J422 electrode formula is basically composed of titanium dioxide, aluminosilicate, carbonate, ferroalloy and organic matter. The disadvantages are: 1. Due to the large amount of ilmenite used, there are more FeO and Fe 2 o 3 , in the case of poor deoxidation, it will inevitably bring adverse effects to welding metallurgy, mainly in: the hardness, strength and plasticity of the weld metal will be significantly reduced, especially the low temperature impact toughness will be sharply reduced, affecting the stability of the arc. The re-strike performance of the electrode; 2. Due to the Al in the coating 2 o 3 The high content will cause the following disadvantages in the welding metallurgical process: the mechanical properties of the weld metal will decrease, the slag removal will be difficult, and the stability of the arc will be affected; 3. The viscosity of titanium dioxide is low, and it lacks binding force on the surrounding particles. Using it as the main material for coating molding will inevitably affect the strength of the coating and the smoothness and compactness of the appearance. This is an important reason for the damage of the coating. One of the reasons; 4, CaCO 3 (or MgCO 3 ) high dosage will directly affect the fluidity of slag, resulting in unsmooth operation