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发明授权
CN107127480B 一种用于海工齿条钢Q690焊接的低合金钢焊条 有权

一种用于海工齿条钢Q690焊接的低合金钢焊条
摘要：
本发明公开了一种用于海工齿条钢Q690焊接的低合金钢焊条，由焊芯与药皮组成；所述药皮由以下按照质量百分比的原料组成：萤石15～25％，硅微粉2～5％，金红石3～6％，铁粉6～12％，CMC 0.3～0.7％，纯碱0.5～0.8％，海藻酸盐0.5～0.7％，锰合金、铬合金、钼合金的混合物7～10％，镍粉6～7％，余量为大理石。所述焊芯由以下按照质量百分比的成分组成：C≤0.10％、Mn 0.35～0.60％、Si≤0.03％、Cr≤0.20％、Ni≤0.30％、S≤0.010％、P≤0.015％、Cu≤0.20％，余量为Fe及不可避免的杂质。本发明满足海工齿条钢Q690配套低合金钢焊条化学成分要求，并使熔敷金属保持高强度、使低温冲击韧性得到改善，焊条表面光滑，成品率高，偏心稳定；焊条全位置焊接性能优良。
摘要（英）：

The invention discloses a low-alloy-steel welding rod for welding of maritime work rack steel Q690. The low-alloy-steel welding rod comprises welding core and a coating. The coating comprises the following raw materials of, by mass, 15%-25% of fluorite, 2%-5% of silicon micro powder, 3%-6% of rutile, 6%-12% of iron powder, 0.3%-0.7% of CMC, 0.5%-0.8% of sodium carbonate, 0.5%-0.7% of alginate, 7%-10% of a mixture of manganese alloy, chromium alloy and molybdenum alloy, 6%-7% of nickel powder, and the balance marble. The welding core comprises the following components of, by mass, 0-0.10% of C, 0.35%-0.60% of Mn, 0-0.03% of Si, 0-0.20% of Cr, 0-0.30% of Ni, 0-010% of S, 0-0.015% of P, 0-0.20% of Cu, and the balance Fe and unavoidable impurities. The low-alloy-steel welding rod meets the chemical component requirements of matching of the maritime work rack steel Q690 and the low-alloy-steel welding rod, deposited metal keeps high strength, low-temperature impact toughness is improved, the surface of the welding rod is smooth, the yield is high, eccentricity is stable, and all-position welding performance of the welding rod is good.

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