利用金相显微镜、扫描电镜以及透射电镜等检测设备，研究了不同终轧温度对高强集装箱用钢的组织、性能及第二相粒子析出行为的影响。研究结果表明；不同终轧温度下高强集装箱用钢的组织均由铁素体和少量珠光体组成，铁素体晶粒度均为13.0级；850℃终轧与890℃终轧相比，屈服强度与抗拉强度分别提高32 MPa与26 MPa。理论计算与透射电镜观察结果表明：高强集装箱用钢强度的提高主要是因为850℃终轧时第二相粒子的形核率更高、析出数量更多、粒子间距更小，析出强化效果更加显著。
Inlfuence of ifnish rolling temperature on the metallographic structure, mechanical properties and precipitation behavior of the second phase particles was studied by means of optical microscopy, scanning electron microscopy, transmission electron microscopy and other test equipments. The results show that the metallographic structures of high strength steels for container with different ifnish rolling temperatures are composed of ferrite and a little pearlite and the grain size grades of ferrite are both 13.0. Compared with the one with ifnish rolling temperature of 890℃, the yield strength and tensile strength of the one with ifnish rolling temperature of 850 ℃ increase by 32 MPa and 26 MPa respectively. The results of theoretical calculation and observation by TEM show that the higher strength of the one with finish rolling temperature of 850 ℃ mainly is due to the higher nucleation rate of second phase particles, more precipitation amount and smaller particle spacing, which makes precipitation strengthening effect more signiifcant.
参考文献
- 下载量()
- 访问量()
- 您的评分：
-
10%
-
20%
-
30%
-
40%
-
50%