前言金属的高温持久强度是高温构件设计的主要指标。众所周知,金属材料的高温持久强度受化学成分、冶金工艺、热处理制度以及试验条件的影响。因而试验数据具有较大的分散性,只有应用统计分析方法来处理,才会得到满意的结果。特别是用短时间的试验数据,外推十万小时的持久强度必然会造成较大误差,如何正确评价材料的高温性能是关系到高温下工作部件的安全性和可靠性 Foreword High-temperature, long-lasting strength of metal is a key indicator of high-temperature component design. It is well known that the high-temperature long-term strength of metal materials is affected by chemical composition, metallurgical process, heat treatment system and test conditions. Therefore, the test data has a larger dispersion, only the application of statistical analysis to deal with, will get satisfactory results. Especially with a short period of test data, the extrapolation of long-lasting strength of 100,000 hours will inevitably lead to greater errors, how to correctly evaluate the material’s high temperature performance is related to the high temperature working parts of the safety and reliability