NICKEL-FREE ELECTRODE FOR COLD ELECTRIC ARC WELDING OF GRAY AND HIGH-STRENGTH CAST IRON WITH STEEL Russian patent published in 2000 - IPC

FIELD: electric arc welding systems. SUBSTANCE: nickel-free electrode for cold electric arc welding of gray and high-strength cast iron with steel includes low-carbon steel rod with coating containing, mas.%: marble, 5-9.5; fluospar, 10-19; feldspar, 1-8; ferrovanadium, 55.5-59.5; copper powder, 13.5-20; potash, 1-5; liquid glass, 25-35 in relation to total content of all other ingredients. Relation of ferrovanadium to copper powder is 3-4.1. Relation is D/d= 1.7-1.85, where D - diameter of coated electrode, mm; d - diameter of rod. EFFECT: enhanced quality of welded joints, improved ductility and resistance to cracking, lowered rigidity of seam metal and metal near seam zone, satisfied cutting capability of joints welded by such electrode; improved structure of electrode. 2 tbl, 1 ex