摘要
利用CCT-AWY型设备进行连续退火模拟试验,研究了不同临界区加热温度对冷轧超高强双相钢显微组织及力学性能的影响。试验结果表明,随着退火温度的升高,马氏体的体积分数不断增长;在适当的退火温度下,可以获得近等轴铁素体和均匀分布马氏体的双相组织。试验用钢的强度、延伸率、显微硬度以及断口形貌与加热温度、显微组织紧密相关。
The influence of intercritical annealing temperature on microstructures and mechanical properties of a cold rolled ultra high strength dual-phase steel was investigated. It was found that the volume fraction of martensite increased with increasing intereritical annealing temperature. Under appropriate intercritical annealing conditions, the microstructure of DP steel consists of nearly equiaxial ferrite and uniformly distributed martensite islands. The variation of strength, elongation, hardness and fracture mechanism of the specimens with intercritical annealing temperature were correlated with microstructural features.
出处
《宝钢技术》
CAS
2017年第2期15-18,共4页
Baosteel Technology
关键词
双相钢
临界区热处理
力学性能
显微组织
dual-phase steel
intercritical heat treatment
mechanical properties
microstructure
