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研究了CMnAlCu-TRIP钢板的组织和力学性能和残余奥氏体的稳定性。1mm厚的冷轧钢板经820℃温度临界退火2min,分别在500、450和400℃贝氏体区等温不同的时间,观察了试样的组织,测得了力学性能、残余奥氏体含量及其碳含量。试验结果表明,铝、铜能提高残余奥氏体的含量及其碳含量,CMnAlCu-TRIP钢具有优异的力学性能,在450℃等温60s时力学性能最佳;CMnAlCu-TRIP钢残余奥氏体的碳含量高,因而其稳定性高于传统CMnSi-TRIP钢。
The microstructure and mechanical properties of CMnAlCu-TRIP steel and the stability of retained austenite were studied. 1mm thick cold-rolled steel was annealed at 820 ℃ for 2min. The microstructure of the sample was observed at different temperatures in the bainite region of 500, 450 and 400 ℃ respectively. The mechanical properties, residual austenite content, Carbon content. The results show that aluminum and copper can improve the content of retained austenite and its carbon content. CMnAlCu-TRIP steel has excellent mechanical properties and has the best mechanical properties at 450 ℃ for 60s. The residual austenite of CMnAlCu-TRIP steel Its high carbon content makes it more stable than conventional CMnSi-TRIP steels.