退火工艺对低碳含镍DP钢组织及性能的影响
发布时间：2018-07-21 11:23
【摘要】：设计了一种低碳含镍DP钢,采用Gleeble-3500测试了CCT曲线,用金相显微镜观察了微观组织。依据CCT曲线进行了退火工艺设计,采用五因素四水平正交试验方法,结合力学性能测试、SEM组织观察和彩色金相等分析手段,探讨分析了不同工艺参数对DP钢组织性能的影响。试验结果表明,试验材料的A_(c1)为712℃,A_(c3)为928℃;连续冷却过程中,出现贝氏体相变的临界冷速为5℃/s,马氏体相变的临界冷速为30℃/s;退火温度对屈强比和伸长率影响最大,而退火时间对n值的影响最大,整体考虑3个性能指标,得出最合理的退火工艺为840℃退火210 s,缓慢冷却至740℃后快速淬火至350℃时效240 s。
[Abstract]:A low carbon nickel containing DP steel was designed. The CCT curve was measured by Gleeble-3500 and the microstructure was observed by metallographic microscope. The annealing process was designed according to the CCT curve. The effects of different process parameters on the microstructure and properties of DP steel were analyzed by means of five factors and four levels orthogonal test, SEM microstructure observation and color metallography analysis. The results show that the critical cooling rate of bainite transformation is 5 鈩，
本文编号：2135362
[Abstract]:A low carbon nickel containing DP steel was designed. The CCT curve was measured by Gleeble-3500 and the microstructure was observed by metallographic microscope. The annealing process was designed according to the CCT curve. The effects of different process parameters on the microstructure and properties of DP steel were analyzed by means of five factors and four levels orthogonal test, SEM microstructure observation and color metallography analysis. The results show that the critical cooling rate of bainite transformation is 5 鈩，
本文编号：2135362
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