T10钢经多道轧制后,制得晶粒尺寸约1μm的超细晶钢,研究了超细晶T10钢加热保温后水冷过程中的组织变化。结果表明,750℃保温5～6 min,晶粒尺寸为2～3μm,水冷后组织为马氏体和细层片珠光体;延长保温时间,晶粒继续长大,水冷只得到马氏体。晶粒细化可促进钢水冷过程中珠光体相变。 T10 steel after multi-pass rolling, the grain size of about 1μm ultrafine-grained steel was prepared to study the ultrafine-grained T10 steel after heating and cooling process changes in the organization. The results show that the microstructure is martensite and fine lamellar pearlite after cooling at 750 ℃ ​​for 5 ~ 6 min and grain size of 2 ~ 3μm. When the holding time is prolonged, the grains continue to grow and only martensite is obtained by water cooling. Grain refinement can promote the pearlite transformation during the steel cooling.