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研究了不同铌含量焊条焊接下9%Ni钢的显微形貌和力学性能。结果表明,铌元素的加入提高了材料的强度与塑性。但当Nb元素含量高达3.5%以上时,材料的低温韧性会有所下降。
The microstructure and mechanical properties of 9% Ni steel with different niobium content welding electrodes were studied. The results show that the addition of niobium increases the strength and ductility of the material. However, when Nb content is as high as 3.5% or more, the low temperature toughness of the material will decrease.