Abstract The effects of deformation on transformation kinetics during continuous cooling and microstructure evolution of a medium carbon high strength steel were investigated by metallographic method. dilatometry and X-ray diffraction etc. The results show that ausforming accelerated the ferrite and martensite transformation. but significantly retarded the bainite transformation. https://www.chiggate.com/3m-speedglas-9002nc-welding-helmet-fashion/