Welding electrodes. Scheme, description

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ENCYCLOPEDIA OF RADIO ELECTRONICS AND ELECTRICAL ENGINEERING
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Electric welding. Welding electrodes. Encyclopedia of radio electronics and electrical engineering

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Encyclopedia of radio electronics and electrical engineering / welding equipment

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welding electrode - this is a metal or non-metal rod designed to supply current to the workpiece being welded.

There are two types of electrodes:

melting, usually made of the same or similar to the metal being welded;
non-consumable, which, in turn, can be metallic (usually tungsten) or non-metallic (coal or graphite).

In view of the widespread use of welding using MMA technology (manual welding with stick electrodes), consumable metal electrodes with a coating are most widely used (Fig. 17.3).

Welding electrodes
Rice. 17.3. Welding consumable electrode coated: 1 - rod; 2 - section of the transition; 3 - coating; 4 - contact end uncoated

Electrode rod

The metal rod of the electrode is made of wire with a diameter of 1,6-12 mm. According to the chemical composition, the electrode wire is divided into three groups.

Group 1. Carbon, with a carbon content of not more than 0,12%, the wire is designed for welding low-carbon, medium-carbon, and some low-alloy steels. The low carbon content of the welding wire reduces the tendency of the weld metal to porosity and the formation of hard hardening structures.

Group 2. Alloy wiredesigned for welding low-alloy, structural and heat-resistant steels.

Group 3. High alloy wiredesigned for welding chromium, chromium-nickel, stainless and other alloy steels.

Author: Koryakin-Chernyak S.L.

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