以一种超高强钢为研究对象,对其进行了热力学计算分析和热模拟压下实验,采用金相组织和扫描形貌分析等手段,研究了压下变形参数对超高强钢再结晶的影响规律。研究结果表明:变形速率越大,变形温度越低,实验钢动态再结晶越不容易发生;变形温度为950℃,变形速率为0.1s~(-1)时,真应变为0.1,奥氏体晶粒尺寸为65.24μm;真应变为0.5时,稳态连续再结晶形成的奥氏体沿着原来奥氏体向晶内长大,尺寸较为均匀,晶粒细化到48.21μm;真应变为0.8时,发生非连续再结晶,晶粒细化到30.45μm,呈现多边形等轴状。 Taking a kind of ultra-high strength steel as the research object, thermodynamic analysis and thermal simulation were carried out. The effects of deformation parameters on recrystallization of ultra-high-strength steel were studied by means of microstructure and scanning morphology analysis law. The results show that the higher the deformation rate is, the lower the deformation temperature is. The lower the deformation temperature is, the less the dynamic recrystallization occurs in the experimental steel. The true strain is 0.1 when the deformation temperature is 950 ℃ and the deformation rate is 0.1s -1, Grain size of 65.24μm; true strain becomes 0.5, the austenite formed by steady-state continuous recrystallization grows into the crystal along the original austenite, the size is more uniform, the grain refinement to 48.21μm; true strain should be 0.8, the occurrence of discontinuous recrystallization, grain refinement to 30.45μm, showing polygonal isometric.