研究了在奥氏体低温区变形时显微组织的变化 ,并测试了其变形抗力。结果表明 :在 Ar3 以上温度变形会产生应变诱发铁素体相变 ,使变形抗力下降。通过降低变形温度 ,铁素体晶粒得到细化 The change of microstructure in the deformation of austenite at low temperature was studied and its deformation resistance was tested. The results show that temperature deformation above Ar3 will induce strain-induced ferrite transformation and decrease deformation resistance. By reducing the deformation temperature, ferrite grains are refined