DP590冷轧板热处理的组织和性能  

Microstructure and Performance of DP590 Cold Rolled Steel Strip After Heat Treatment Processes

作　　者：霍刚[1] 李振兴[1] 岑一鸣[1] 李国栋[1,2] 

机构地区：[1]东北大学轧制技术及连轧自动化国家重点实验室,辽宁沈阳110819 [2]本钢浦项冷轧薄板有限责任公司,辽宁本溪117000

出　　处：《东北大学学报（自然科学版）》2013年第7期944-947,970,共5页Journal of Northeastern University(Natural Science)

基　　金：国家自然科学基金资助项目(51174057;51274062);国家高技术研究发展计划项目(2012AA03A503)

摘　　要：为了加速国内双相钢的开发和应用,采用CAS-300Ⅱ模拟退火实验机,通过模拟退火实验,研究了加热速率、临界区退火温度、过时效温度、过时效时间对DP590双相钢组织性能的影响.结果表明,加热速率在5～60℃/s内增加时,屈服强度、抗拉强度均增加,延伸率、强塑积均减小;临界区退火温度在780～850℃内增加时,屈服强度、抗拉强度先减小后增加,延伸率、强塑积均增加;过时效温度在260～400℃内增加时,屈服强度增加,抗拉强度减小,延伸率整体呈增加趋势,屈强比增加;在280℃进行过时效,过时效时间在240～480 s内增加时,屈服强度、抗拉强度均减小,延伸率、强塑积先减小后增加.In order to accelerate the development and application of the domestic dual phase steel,the effects of the heating speed,intercritical annealing temperature,overaging temperature,and the time of overaging on the microstructure and properties of DP590 dual phase steels were studied by a CAS-300Ⅱannealing simulator.The results showed that the yield strength and tensile strength both increased and the elongation and product of strength and ductility both decreased with the increase of the heating speeds between 5 and 60 ℃/s.The yield strength and tensile strength both decreased first,then increased,the elongation and product of strength and ductility both increased with the increase of intercritical annealing temperatures between 780 and 850 ℃,The yield strength increased,the tensile strength decreased,the elongation increased generally,the yield ratio increased apparently with the increase of the overaging temperature between 260 and 400 ℃.When the overaging temperature was 280 ℃,the yield strength and tensile strength both decreased,the elongation and product of strength and ductility decreased first,then increased with the increase of the over aging time within the range of 240~480 s.

关 键 词：冷轧板 双相钢 热处理 显微组织 力学性能 

分 类 号：TG156.1[金属学及工艺—热处理]