临界区退火对含磷低硅TRIP钢组织性能的影响  

Effects of Intercritical Annealing on Microstructure and Mechanical Properties of Low Silicon TRIP Steel with Phosphorus Addition

作　　者：陈蓬[1] 许云波[1] 沈春豫 王国栋[1] 

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

出　　处：《东北大学学报（自然科学版）》2013年第11期1562-1565,1588,共5页Journal of Northeastern University(Natural Science)

基　　金：国家自然科学基金资助项目(51174059;U1260204);国家重点基础研究发展计划项目(2011CB606306);中央高校基本科研业务费专项资金资助项目(N090407001;N120607001)

摘　　要：在实验条件下对含磷TRIP(transformation-induced plasticity)钢进行临界区退火研究,主要研究了不同退火条件对实验钢组织和力学性能的影响.通过添加P元素降低钢中的Si含量,可改善表面质量,解决镀锌问题,且P价格低廉,成本降低.结果表明:随等温时间增加,贝氏体含量增加,抗拉强度增加;在两种等温温度下,残余奥氏体量都是呈先增加后降低的趋势,780℃等温时在180 s时得到最大的残余奥氏体量22%,800℃等温时在90 s时得到最大的残余奥氏体量20%;780℃等温180 s时获得最佳力学性能,强塑积达22 854 MPa·%,P的加入并未引起力学性能损失,各项力学性能优良.The microstructure and mechanical properties for low silicon transformation-induced plasticity （TRIP） steels with phosphorus addition under different annealing conditions were investigated in laboratory. The addition of low price element phosphorus reduced the silicon content which improved surface qualityand solved galvanizing problem with lowercosts. The results showed that the tensile strength increased with the increase of the annealing time, the tendency of the amount of the retained austenite first increased and then decreased at both intercritical temperatures. The largest amount of the retained austenite was 22% at the constant temperature of 780 ~C for 180 s while 20% at the constant temperature of 800 ~（2 for 90 s. The steels had excellent mechanical properties with the product of the tensile strength and elongation of 22 854 MPa -% when annealing at constant temperature of 780 ~C for 180 s. No mechanical property loss were caused by the phosphorus addition and the mechanical properties of the low silicon TRIP steels were excellent.

关 键 词：TRIP钢 临界区退火 含磷 低硅 组织机械性能 

分 类 号：TP142.1[自动化与计算机技术—控制理论与控制工程]