科研之友
微信
新浪微博
Facebook
分享链接
摘要
In order to study the strengthening effect of titanium in low carbon steel, the microstructure evolution and strengthening mechanism of two kinds of experimental steels during deformation and cooling were studied by using a Gleeble 3800 thermal simulator. The results show that under the same rolling process, the microstructure of the steel containing titanium and low carbon steel are significantly refined, and the titanium doesn't make a significant difference in the grain size of the experimental steels. The yield strength of the titanium containing steel under different processing conditions is consistent with the trend of precipitation strengthening effect. The deformation induced precipitation will affect the grain refinement strengthening and precipitation strengthening effect of the titanium containing steel at the same time. The yield strength of the titanium containing steel rolled at 900℃ for 100 s and then isothermal at 600℃ for 600 s reaches the maximum, and the transmission electron microscopy (TEM) photograph shows that there are a large number of precipitated particles with size of 3-7 nm in the room temperature microstructure of the titanium containing steel, which resulting in a strong precipitation strengthening effect. The addition of titanium to the low carbon steel has little effect on solution strengthening and dislocation strengthening, but slightly improves the grain refinement strengthening effect. The high precipitation strengthening effect is the main reason for the increase of yield strength of the titanium containing steel.
- 单位
