CLAM钢的高温蠕变行为

发布时间：2018-12-30 13:44

【摘要】：为了保证CLAM钢在服役条件下的安全性,避免蠕变对设备造成破坏,对CLAM钢的蠕变行为进行了研究。首先,在高温持久蠕变试验机上对CLAM钢进行蠕变试验,绘制了蠕变曲线并讨论了CLAM钢在试验条件下的蠕变变形机制,结果表明,CLAM钢具有很强的温度敏感性,第二相粒子强化机制为主要蠕变机制;其次,采用双对数等温线外推法和Larson-Miller参数法对CLAM钢的蠕变寿命进行了预测,确定了两种蠕变寿命预测模型;最后,比较了两种蠕变寿命预测模型的精度,结果显示,Larson-Miller参数法的外推精度更高,更能反映实际情况。
[Abstract]:In order to ensure the safety of CLAM steel under service conditions and avoid creep damage to the equipment, the creep behavior of CLAM steel was studied. Firstly, creep tests on CLAM steel are carried out on a high temperature creep tester. The creep curves are drawn and the creep deformation mechanism of CLAM steel under experimental conditions is discussed. The results show that CLAM steel is highly temperature-sensitive. The second phase particle strengthening mechanism is the main creep mechanism. Secondly, the double logarithmic isotherm extrapolation method and Larson-Miller parameter method are used to predict the creep life of CLAM steel, and two kinds of creep life prediction models are determined. Finally, the accuracy of the two creep life prediction models is compared. The results show that the extrapolation accuracy of the Larson-Miller parameter method is higher and can reflect the actual situation more effectively.
【作者单位】： 贵州大学材料与冶金学院;贵州省材料结构与强度重点实验室;
【基金】：国家自然科学基金资助项目(51461008)
【分类号】：TG142.1
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本文编号：2395659