低合金高强钢形变奥氏体相变行为及其模型  

Continuous cooling transformation behavior and modeling of hot deformed austenite in a HSLA steel

作　　者：赵宝纯 张涛 李桂艳 林田子 严平沅 ZHAO Bao-chun;ZHANG Tao;LI Gui-yan;LIN Tian-zi;YAN Ping-yuan(Key Laboratory of Metal Materials for Marine Equipment and Application,Anshan 114009,Liaoning,China;Iron and Steel Research Institute of AnGang Group,Anshan 114009,Liaoning,China)

机构地区：[1]海洋装备金属材料及应用国家重点实验室,辽宁鞍山114009 [2]鞍钢集团钢铁研究院,辽宁鞍山114009

出　　处：《钢铁》2019年第7期98-102,共5页Iron and Steel

摘　　要：为了研究低合金高强钢的形变奥氏体连续冷却转变行为及组织变化规律,利用Gleeble-3800热力模拟试验机对试验钢进行了多道次轧制工艺模拟试验,并根据试验所得相变温度和各冷却速度下的室温组织相对量,回归出相变模型。结果表明,试验钢在变形后的连续冷却过程中发生铁素体、珠光体、贝氏体和马氏体转变,基于对各转变的温度和组织相对量得到的相变模型分析,证实了模型的可靠性。Multi-pass deformation simulation tests were performed on a high strength low alloy ( HSLA) steel by using a Gleeble-3800 thermo-mechanical simulator to study the continuous cooling transformation behaviors and the resultant microstructures. Based on the transformation temperatures or transformed microstructure volume fractions, the models for phase transformation of the tested steel were constructed. The results showed that there were ferrite,pearlite,bainite and martensite transformation occurring in the high strength low alloy steel. And the validity of the models for phase transformation temperatures or microstructure volume fractions resulting from the experimental data was confirmed.

关 键 词：低合金高强钢 形变奥氏体 连续冷却转变 相变模型 

分 类 号：TG142.33[一般工业技术—材料科学与工程]