The Creep Rupture Properties of 9% Chromium Steels and the Influence of Oxidation on Strength
The Creep Rupture Properties of 9% Chromium Steels and the Influence of Oxidation on Strength
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%20蠕变%20破裂%20属性%20的%209%%20铬%20钢%20和%20的%20影响%20的%20氧化%20对%20强度
DOI：
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发表时间：
2001
期刊：
影响因子：
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通讯作者：
W. J. Quadakkers
中科院分区：
文献类型：
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作者：
H. Nickel;P. Ennis;W. J. Quadakkers
用二次蠕变速率和持久寿命估算了9%铬合金钢Fe9Cr1MoVNb(P91)、Fe9Cr1MolWVNb(E911)和Fe9CrMo2WVNb(P92)的持久数据，并与文献中Fe9Cr1Mo(P9)和12Cr1MoV的数据进行了比较。为了预测9%铬钢的长期持久强度，进行了外推程序。讨论了影响外推可靠性的因素。P92的600℃/100000 h持久强度略高于E911的300℃/100 000 h持久强度。评估了氧化对断裂寿命的影响；对于壁厚小于6 mm的部件，在进行使用寿命预测时，应考虑氧化造成的承载截面损失。
Abstract Creep rupture data for the 9% chromium steels Fe9CrlMoVNb (P91), Fe9CrlMolWVNb (E911) and Fe9Cr Mo2WVNb (P92) have been evaluated using the secondary creep rate as well as the stress rupture life and compared with literature data for Fe9CrlMo (P9) and 12CrlMoV. Extrapolation procedures have been carried out in order to predict the long-terms stress rupture strengths of the 9% Cr Steels. The factors affecting the reliability of the extrapolations are discussed. The 600°C/100 000 h stress rupture strength of P92 was slightly higher than that of E911 based on data of up to 30 000h duration. The effect of oxidation on rupture life was assessed; for components of wall thickness below about 6 mm, the loss of load-bearing cross-section due to oxidation should be taken into account for service life prediction.