發(fā)布時(shí)間：2018-12-30 13:44

【摘要】：為了保證CLAM鋼在服役條件下的安全性,避免蠕變對(duì)設(shè)備造成破壞,對(duì)CLAM鋼的蠕變行為進(jìn)行了研究。首先,在高溫持久蠕變?cè)囼?yàn)機(jī)上對(duì)CLAM鋼進(jìn)行蠕變?cè)囼?yàn),繪制了蠕變曲線并討論了CLAM鋼在試驗(yàn)條件下的蠕變變形機(jī)制,結(jié)果表明,CLAM鋼具有很強(qiáng)的溫度敏感性,第二相粒子強(qiáng)化機(jī)制為主要蠕變機(jī)制;其次,采用雙對(duì)數(shù)等溫線外推法和Larson-Miller參數(shù)法對(duì)CLAM鋼的蠕變壽命進(jìn)行了預(yù)測(cè),確定了兩種蠕變壽命預(yù)測(cè)模型;最后,比較了兩種蠕變壽命預(yù)測(cè)模型的精度,結(jié)果顯示,Larson-Miller參數(shù)法的外推精度更高,更能反映實(shí)際情況。
[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.
【作者單位】： 貴州大學(xué)材料與冶金學(xué)院;貴州省材料結(jié)構(gòu)與強(qiáng)度重點(diǎn)實(shí)驗(yàn)室;
【基金】：國(guó)家自然科學(xué)基金資助項(xiàng)目(51461008)
【分類號(hào)】：TG142.1
，

本文編號(hào)：2395659