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1·With three microalloy steels containing 0.24, 0.15, and 0.08% niobium respectively, the precipitation of niobium carbide in ferrite has been studied.

对铌含量分别为0.24、0.15和0.08%的三炉微合金化钢中碳化铌在铁素体中的沉淀进行了较为深入的研究。