高强度船板钢奥氏体晶粒长大的规律  

Study on Austenite Grain Growth Behavior of High-Strength Shipbuilding Steel

作　　者：彭晟[1] 朱松鹤[1] 张恒华[1] 邵光杰[1] 许珞萍[1] 

机构地区：[1]上海大学材料科学与工程学院,上海200072

出　　处：《钢铁》2009年第2期72-74,82,共4页Iron and Steel

摘　　要：利用光学显微镜和H-800透射电镜研究了不同加热温度和不同保温时间下高强度船板钢奥氏体晶粒长大规律。结果表明,该钢在高温加热时具有较好的抗晶粒粗化能力,奥氏体晶粒粗化温度在1 250℃左右;在1 100℃和1 200℃保温时,奥氏体晶粒等温长大规律较好地服从抛物线型经验表达式;随着温度的升高,钢中的第二相质点逐渐减少,当加热至1 250℃时,钢中仅存TiN颗粒。Austenite grain growth behavior of the high-strength shipbuilding steel at various temperatures and holding for different time was studied by optical microscope and TEM. The results show that the steel has good anticoarsening ability at elevated temperature, the austenite grain coarsening temperature was about 1 250℃, the isothermal growth equation of austenite grains obeyed the parabolic expression at 1 100℃ and 1200 ℃, and with the in- crease of heating temperatures the precipitates were dissolved,onlv TiN was observed at 1250℃.

关 键 词：高强度船板钢 奥氏体晶粒长大 抗粗化能力 析出相 

分 类 号：TG142.15[一般工业技术—材料科学与工程]