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报道了对含微量Nb、Ti、B的极低碳Si，Mn高洁净钢和成分相近的工业钢X60及XTE355的研究结果，并讨论了奥氏体形变对γ→α转变、转变组织及力学性能的影响．试样加热到1200℃均匀化处理后，快速冷却到奥氏体的非再结晶温度区变形70％再经500℃中温等温处理，能够获得微米甚至亚微米级的细化组织．纯净钢和工业钢的平均晶粒尺寸都在3μm以下，780℃变形的X60试样得到了最小的平均晶粒尺寸：X方向为0．99μm，Y方向为1．02μm．显著的晶粒细化效果是由于形变奥氏体的晶界面积大幅度增加以及变形带和其他晶体缺陷提供了大量的有利形核地点，使γ→α转变时α相的形核率提高的结果．
This paper reports the results of the research on X60 and XTE355 industrial steels with very low carbon Si, Mn and high purity steel containing trace amounts of Nb, Ti and B as well as the transformation from austenite to γ → α, transformation of microstructure and mechanics The impact of performance. After the sample was heated to 1200 ° C, it was rapidly cooled to 70% of the austenite in the non-recrystallization temperature zone and then to 500 ° C in the isothermal treatment to obtain micronized or even sub-micron fine structure. The average grain size of pure steel and industrial steel is below 3μm, and the minimum average grain size of X60 specimen deformed at 780 ℃ is 0.99μm in X direction and 1.02μm in Y direction. The remarkable grain refining effect is due to the substantial increase in the grain boundary area of deformed austenite and the large number of favorable sites for nucleation of deformation bands and other crystal defects, resulting in an increase in the nucleation rate of the α phase at γ → α transformation result.