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为研究稀土在CSP连续轧制过程中对低碳结构钢再结晶行为影响,采用Gleeble-1500热模拟机,对加稀土和未加稀土的低碳结构钢进行了单道次、双道次热压缩实验,并且对加稀土和未加稀土的低碳结构钢进行CSP工艺的模拟,比较金相照片及真应力-应变曲线。实验结果表明:稀土提高了低碳结构钢的动态再结晶临界应变εD,在一定温度下降低静态软化率;并且在CSP热轧过程中采用加入稀土的方法,最终获得较未加稀土试样更为细小的晶粒组织。
In order to study the influence of rare earth on the recrystallization behavior of low carbon structural steel during CSP continuous rolling, the Gleeble-1500 thermal simulator was used to simulate the recrystallization of low carbon structural steel with rare earth and non-added rare earth. Compression experiments were carried out. The CSP process simulation was performed on the low carbon steel with and without rare earths. The metallographic photographs and true stress-strain curves were compared. The experimental results show that RE increases the critical recrystallization strain εD of low carbon structural steels and decreases the static softening rate at a certain temperature. In the hot rolling process of CSP, the addition of rare earth is more effective than the rare earth addition For the fine grain structure.