采用修正θ投影法预测Cr25Ni35Nb炉管钢的蠕变性能  

Prediction of Creep Properties for Cr25Ni35Nb Furnace Tube Steel by Modified θ Projection Method

作　　者：刘建杰[1] 巩建鸣[1] 姜勇[1] 沈利民[1] 耿鲁阳[1] 尹基奉[2] 

机构地区：[1]南京工业大学机械与动力工程学院,南京210009 [2]韩国中央大学材料机械学院

出　　处：《机械工程材料》2011年第1期89-92,共4页Materials For Mechanical Engineering

基　　金：国家"863"计划资助项目(2007AA04Z407);国家自然科学基金资助项目(50775107)

摘　　要：在不同温度和不同应力下对Cr25Ni35Nb炉管钢进行了蠕变试验;并采用修正后的θ投影法对该钢的蠕变曲线进行了拟合,得到了蠕变方程中参数iθ的数学表达式,建立了该钢在任意温度和应力条件下的蠕变曲线方程,并据此预测了950℃、18 MPa下该钢的蠕变曲线。结果表明:预测曲线和试验曲线吻合较好。The creep tests on the Cr25Ni35Nb furnace tube steel were performed under different temperatures and stresses,the creep curves for the steel were fitted by modified θ projection method.The mathematical expressions of the parameter θi were built and the creep curve equation of the steel under arbitrary temperatures and stresses was established.Then the creep curve at 950 ℃ and 18 MPa was predicted.The results indicate that the predicted creep curve showed a good agreement with the experimental one.

关 键 词：θ投影法 Cr25Ni35Nb钢 蠕变性能 预测 

分 类 号：TG113.25[金属学及工艺—物理冶金]