LNG用9Ni钢控轧控冷工艺的热模拟研究  

Study on Thermal Simulation of Controlled Rolling and Cooling of 9Ni Steel Used in LNG

作　　者：孟传峰 崔天燮[1] 刘东风[1] 王采焕 

机构地区：[1]山西太钢不锈钢股份有限公司,山西太原030003

出　　处：《压力容器》2010年第9期7-10,15,共5页Pressure Vessel Technology

基　　金：国家高技术研究发展计划(863计划)资助项目:液化天然气储罐用超低温9%Ni钢开发应用技术(2007AA03Z555)

摘　　要：采用Gleeble 3800热模拟实验机测定了9N i钢的CCT曲线,进行不同终轧温度变形试验,分析了不同冷却速度对组织的影响,研究了不同终轧温度与组织、晶粒度、性能的关系。结果表明：轧后冷却速度大于5℃/s为马氏体组织,小于3℃/s为贝氏体组织,9N i钢的终轧温度选择800~850℃,晶粒细小,综合力学性能良好。CCT curves of 9Ni steel was tested by using the thermodynamic simulator Gleeble 3800,different finishing temperature after final deformation tests were experimented,different cooling rate on microstructure were analysed,the relations between different final deformation temperature and microstructure,grain size,performance were researched.The results show that martensite is available when cooling rate over 5 ℃/s or more after rolling,bainite is available less than 3 ℃/s,finishing rolling temperature′s scope keeps 800~850 ℃ is appropriate,the grain size is fine,the comprehensive mechanical properties of steel achieved good.

关 键 词：9NI钢 CCT曲线 控轧控冷 

分 类 号：TG142.1[一般工业技术—材料科学与工程]