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对含镍３．５％低温钢手工电焊条配方中稀土钇与硼的作用进行了试验研究。试验证明：钇具有明显的脱氧效果，微量硼的加入可以进一步细化晶粒并起到净化焊缝的综合作用，对低温韧性的提高有显著效果。
The experiment on the effect of rare earth yttrium and boron in the formula of 3.5% low temperature steel containing nickel by hand welding was carried out. Experiments show that: yttrium has a significant effect of deoxidation, the addition of trace boron can further refine the grain and play a combined role of purification of the weld, the improvement of low temperature toughness have a significant effect.