用四种耐热钢分别在同一应力不同温度下进行了一系列的蠕变试验.又分析了文献上四种耐热钢和五种镍基合金的蠕变及蠕变断裂数据.所有自己的试验温度以及文献上原始数据的试验温度都在每一种耐热钢或高温合金的0.45T_m(T_m是熔点的绝对温度)以上.根据自己的试验以及分析文献数据的结果,指出在所研究的温度范围内,对于所研究的不同类型的耐热钢和高温合金说来,高温蠕变过程中存在激活能是一个普遍的现象.文中指出了通过激活能用提高温度法缩短蠕变试验时间的可能性,并讨论了这种外推方法所适用的温度范围和它的误差.
A series of creep tests has been made on four types of heat-resistant steels under different temperatures and under the same stress for each type of steel. Creep and rupture date of five types of Nimonic alloys and four types of heat-resistant steels obtained from the literature have been analyzed. The temperatures of our creep test and those given in the literature are all above 0.45 T_m (absolute melting temperature) for each type of steel or alloy. From our results of analyses, it is shown that, for the temperatures investigated, in the process of high temperature creep, the existance of activation energy is a general phenomenon for different types of heat-resistant steels and alloys given above. To accelerate creep tests by an elevation of temperature through activation energy is shown to be possible, the temperature range for the application of this extrapolation method and the errors involved are discussed.
参考文献
| [1] | |
| [2] |
- 下载量()
- 访问量()
- 您的评分：
-
10%
-
20%
-
30%
-
40%
-
50%