Alkaline welding rod coating capable of improving welding process property

Abstract

The alkaline welding rod coating with raised welding performance consists of: marble 39-45 wt%, silica mud 3-10 wt%, fluorite 16-25 wt%, metal Mn 2-4 wt%, Si-Fe alloy 0.5-3 wt%, Ti-Fe alloy 8-12 wt%, cellulose 0.5-1.0 wt%, titania 3-9 wt%, atomized iron powder 6-15 wt% and graphite+Na2CO3 1-2.5 wt%. The said components are mixed, and the mixture is then coated with sodium water glass as adhesive onto low alloy steel welding core to produce alkaline low alloy steel welding rod or onto carbon steel welding core to produce alkaline carbon steel welding rod. The alkaline welding rod with the welding rod coating has excellent welding performance.

Description

Technical field: [0001] The invention relates to the technical field of welding materials, and relates to a basic electrode coating that can improve the performance of the welding process. Background technique: [0002] A more common problem with basic electrodes is that the process performance of the electrodes is worse than that of acid electrodes, such as larger spatter particles during welding, arc stability, weld shape after welding, and all-position weldability, etc. than acid electrodes. . In order to improve the technological performance of the basic electrode, it is generally used to improve the technological performance of the basic electrode by adding soda ash, mica, water glass powder to the coating or using a binder with lithium water glass, etc., but these methods Effect is not only not too obvious, but also can increase the production cost of welding rod (as lithium water glass is very expensive, its price is 8-10 times of common water glass) and affect the s...

AI Technical Summary

Problems solved by technology

In order to improve the technological performance of the basic electrode, it is generally used to improve the technological performance of the basic electrode by adding soda ash, mica, water glass powder to the coating or using a binder with lithium water glass, etc., but these methods Effect is not only not too obvious, but also can increase the production cost of welding rod (as lithium water glass is very expensive, its price is 8-10 times of common water glass) and affect the service performance of welding rod (as soda ash, water glass powder can increase welding rod Moisture absorption performance, mica will increase the diffusible hydrogen content of the electrode, water glass powder will affect the low temperature toughness of the electrode, etc.)

At present, the electrode made by combining the ordinary basic electrode coating and the low-alloy steel welding core has noisy arc sound, large spatter and large particles during welding, rough weld shape, and poor operability during vertical welding.