SUBMERGED ARC WELDING WIRE STEEL FOR LOW ALLOY STEEL PLATE AND PREPARATION METHOD THEREFOR

摘要

A submerged arc welding wire steel for a low alloy steel plate and a preparation method therefor. The weight percentages of the chemical compositions of the welding wire steel are: C=0.060-0.090%, Si=0.030-0.050%, Mn=0.95-1.05%, P≤0.015%, S≤0.010%, Cr≤0.10%, Ni≤0.05%, and Cu≤0.05%, with the balance being Fe and impurities. The preparation method comprises the steps of: desulfurization of molten iron using a KR, smelting in a converter, deoxidation and alloying, refining, and continuous casting. The welding wire product made of the submerged arc welding wire steel for a low alloy steel plate can improve the stability of the mechanical properties of welding seams, improve the low-temperature impact absorption as well as the welding bead forming effect and slag removal ability, thereby achieving the purpose of improving the welding effect. The preparation method is simple to operate and is suitable for industrial production.