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在 Ｇｌｅｅｂｌｅ－１５００热模拟实验机上对 ＳＳ４００钢进行厂不同温度下的单道次变形实验，对变形后采用喷水和自动落水两种淬火方法的效果进行了对比． 通过对不同变形温度以及试样不同部位的组织分析研究了先共析铁素体的析出规津， 结合不同温度变形后相变点测定的实验结果，确定了应变诱导铁素体相变的上限温度，探讨了应变诱导相变的机制 ，喷水淬火时，试样下同部位冷却速度相差大，不同部位的组织差别也大，冷却速度慢，等轴铁素体多，增加冷却速度，铁素体形态变为包含晶界非整形和魏氏组织侧片铁素体的复杂组织，铁素体量越来越少，自至完全为马氏体，变形温度在８００℃以下，铁素体主要为分布在奥氏体晶界并呈等轴状，应变诱导相变的上限温度为 Ａｒ３与变形温度重合的最高温度，一般在未变形试样的 Ａｒ３以上６０℃左右．
The single-pass deformation experiments of SS400 steel at different temperatures were carried out on the Gleeble-1500 thermal simulation machine, and the effects of two quenching methods using water spraying and automatic falling water after the deformation were compared. The precipitation regularity of pro-eutectoid ferrite was studied through different deformation temperature and microstructure analysis of different parts of the sample, and the upper limit of strain-induced ferrite transformation was determined based on the experimental results of phase transition point after different temperature deformation Temperature, the mechanism of strain induced phase transformation was discussed. When quenching water jet, the cooling rates of the same part under the sample were different greatly, the differences of the microstructure in different parts were also large, the cooling rate was slow, the equiaxed ferrite was large, the cooling rate was increased, The morphology of the ferrite changes to the complex structure including the non-plastic grain boundaries and the ferrite of Widmanstatten flake. The amount of ferrite is less and less, since it is completely martensite, the deformation temperature is below 800 ° C, Mainly distributed in the austenite grain boundary and was equiaxed, the maximum strain induced strain transformation temperature Ar3 and deformation temperature coincide with the highest temperature, usually in the undeformed sample Ar3 above 60 ℃.