摘要
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, mechanical properties and retained austenite stability of CMnAlCu-TRIP steel were investigated. The cold-rolled steel sheet with a thickness of lmm was intercritically annealed at 820℃ for 2min then isothermally treated at 500℃, 450℃ and 400℃ for different time. The microstructures of the specimens were observed, and the mechanical properties, the volume fraction of retained austenite and its carbon concentration of the steel were measured. The results show that aluminum and copper can increase the volume fraction of retained austenite and its carbon concentration, CMnAlCu-TRIP steel has an excellent mechanical properties. The best mechanical properties are obtained when the steel is treated at 450℃ for 60s. Compared with the traditional CMnSi-TRIP steel, CMnAlCu-TRIP steel exhibits higher retained austenite stability due to the higher carbon content, which is the crucial factor determining the retained austenite stability.
出处
《材料热处理学报》
EI
CAS
CSCD
北大核心
2009年第2期67-70,共4页
Transactions of Materials and Heat Treatment
基金
山东省博士后创新项目(20070225)
建设部科技计划项目(2008-K4-7)
山东省中青年科学家奖励基金(2008BS04023)
关键词
相变诱发塑性
铝
铜
力学性能
残余奥氏体稳定性
TRIP
aluminum
copper
mechanical properties
retained austenite stability
