通过实验室热处理模拟实验，对含磷低硅transformation induced plasticity（TRIP）钢快速退火过程中各个阶段的组织演变行为进行研究，主要研究了不同退火温度对各个阶段组织组成的影响。通过添加P元素降低钢中的Si 含量，可改善表面质量，解决镀锌问题，且P 价格低廉，成本降低。结果表明：最终组织中的铁素体量降低，贝氏体和马氏体混合物的量增加。经X射线衍射（XRD）分析可知，残余奥氏体量增加，由750 ℃退火时的12.7 %增加至790 ℃退火时的14.9 %。

The low silicon transformation induced plasticity（TRIP）steel with phosphorus addition at every stage of fast annealing process has been studied by heat treatment experiment at lab. The effects of annealing temperatures on microstructure constitute at every stage are mainly studied. The addition of low price element phosphorus can reduce silicon content， improve surface quality，solve galvanizing problem and reduce costs. Results show that the ferrite content decrease，and the mixture of bainite and martensite content increase at final microstructure. By X-ray diffraction（XRD）analysis，the retained austenite content increases from 12.7 % at 750 ℃ annealing to 14.9 % at 790 ℃.