| 摘要 |
FIELD: welding wire composition for welding and surfacing articles of low-alloy construction steels operating at high sign-variable loads and low temperature values. ^ SUBSTANCE: welding wire contains next relation of ingredients, mass %: carbon, 0.06 - 0.12; silicon, 0.2 - 0.8; manganese, 0.9 - 1.6; vanadium, 0.05 - 0.009; sulfur, no more than 0.025; phosphorus, no more than 0.030; nickel, no more than 0.25; titanium, no more than 0.05; nitrogen, no more than 0.012; iron, the balance. Relation of carbon content of vanadium content being in range 0.4 - 1.2 allows receive stable structure of seam metal with uniformly distributed in it finely dispersed carbides. Relation of sulfur content to total content of calcium and manganese being in range 0.015 - 0.030 provides lowered quantity of non-metallic inclusions along grain boundaries. ^ EFFECT: improved resistance against cracking in near-seam zone of welded seam, combination of optimal strength and impact strength values of welded seam at high corrosion resistance.
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