Abstract:

The tested steel 0. 05C-14Mn-19Cr-0. 7N is melted by 1 t non vacuum induction furnace and remelted to ESR ingot. By sampling at center of ESR ingot and using Gleeble 3800 thermo-simulation testing machine the thenno tensile examination of tested steel at 800 ~ 1250 °C with strain rate 0. 005 ~ 10 s^-1 has been carried out to get the effect of temperature and strain rate on reduction of area of tested steel, and the structure of steel tensile-tested at each temperature is observed. Examination results show that with temperature increasing from 800 ℃ to 1 250 ℃ the tensile strength of tested steel decreases from 327 MPa to 68 MPa and the reduction of area of steel increases from 22% to 55% ；at 1200℃, with strain rate increasing from 0. 01 s^-1 to 10 s-1 the tensile strength of tested steel increases from 43 MPa to 109 MPa and the reduction of area of steel increases from 38% to 71%. Integrating the experimental results it is obtained that the optimized deformation parameters for high nitrogen austenite stainless steel 0. 05C-14Mn-19Cr-0.7N are rolling at 1200 ~ 1250°C with stain rate 1 ~ 10s^-1.