Motivated by the tensile strength loss of 9%Ni steel arc welded joints made using Ni-based austenitic filler metals, the feasibility of maintaining the tensile strength using matching ferritic filler metal has been demonstrated. In comparison with shielded metal arc welded joint made using Ni-based austenitic electrode ENiCrMo-6, higher tensile strength comparable to that of the base metal was obtained using matching ferritic electrode. Besides, sufficient impact toughness energies with much lower mismatch were obtained for weld metal and heat-affected zone. Welded joint with a lower mechanical mismatching is of considerable importance for achieving acceptable combination of tensile strength and impact toughness. A better combination of these mechanical properties is ensured by applying a post weld heat treatment.

中文翻译：

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使用匹配铁素体填充金属的 9%Ni 钢的保护金属电弧焊

由于使用 Ni 基奥氏体填充金属制成的 9%Ni 钢弧焊接头的抗拉强度损失，已经证明了使用匹配的铁素体填充金属保持抗拉强度的可行性。与使用镍基奥氏体焊条 ENiCrMo-6 制成的屏蔽金属电弧焊接接头相比，使用匹配的铁素体焊条获得了与母材相当的抗拉强度。此外，焊缝金属和热影响区获得了足够低失配的冲击韧性能量。具有较低机械失配的焊接接头对于实现可接受的抗拉强度和冲击韧性组合非常重要。通过应用焊后热处理确保更好地结合这些机械性能。