Abstract
The main goal of the current paper is focused to investigate and reveal the importance critical transition temperatures. Different techniques were used to reveal the critical transition temperatures. The medium carbon vanadium titanium and titanium free micro alloyed steels tested in this work by isothermal treatment. In order to reveal experimentally the critical forming temperatures and compare it by predicted using equations and also describe the influence of alloying elements (Titanium) on the transformation behavior, martensitic starting formation temperature. This study has been carried out over a wide range of isothermal treatment temperature (270-350 ○C). Samples were investigated using optical microscope (OM) and Field Emission Gun Scanning Electron Microscopy (FEGSEM) and it has been found that the tested procedure method give excellent results for the medium carbon vanadium titanium and titanium free micro alloyed steels.