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钢和高温合金的热强性能数据(蠕变极限、持久强度极限),是火电机组等现代工业的研究与设计中,不可缺少的依据。也是判定在长期运行后材料寿命以及指导研制新型优质材料的重要资料。由于火力发电设备的使用期限较长,一般为十万小时至廿万小时。当然,要进行这么长期的试验是不容易的,因此,人们致力于从分析短期试验数据出发,来内推长期强度性能。高温热强试验的外推理论研究也就普遍引起了重视。外推方法大多数首先是针对持久强度的,但也适用于蠕变。一般地说,外推方法无非是在合理收集短期数据的基础上,设法建立起时间、温度、应力三者之间的
Thermal performance data of steel and superalloy (creep limit, ultimate strength limit) are indispensable basis for the research and design of modern industry such as thermal power plant. It is also important information to determine the material life after long-term operation and to guide the development of new high-quality materials. Due to the long service life of thermal power generation equipment, it generally ranges from 100,000 hours to 200,000 hours. Of course, it is not easy to carry out such a long-term test, so people are committed to inferring long-term strength performance from the analysis of short-term test data. The extrapolation theory research of high-temperature hot-strength test has also drawn great attention. Most of the extrapolation methods are primarily for long-lasting strength, but also for creep. In general, the extrapolation method is nothing more than a reasonable collection of short-term data on the basis of trying to establish the time, temperature, stress between the three