| 摘要 |
electrode coatings for welding. SUBSTANCE: electrode coating for manual arc welding of carbon and low-alloyed steels includes the following components, wt.% marble, 62-80; quartz sand, 18-24; alloying and deoxidizing materials, the balance. Coating may additionally contain chalk or limestone. Alloying and deoxidizing components are used in the form of manganese or ferromanganese in amount of 2-12 wt.%, and ferrosilicon, up to 5 wt.%. Coating may additionally contain, wt.%: fluorspar, up to 5; alumina, up to 10; plastisizers selected from group containing carboxymethyl cellulose, potash, soda and mica, up to 3. Electrode with offered coating has higher efficiency of melting. EFFECT: preparation of welding slag featuring spontaneous decomposition according to silicate decomposition mechanism. 6 cl, 2 tbl
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