陈国宏,白小龙,刘俊建,王家庆,汤文明

• 1:国网安徽省电力公司电力科学研究院
• 2:合肥工业大学材料科学与工程学院

摘要(Abstract)：

HR3C及T92两种典型超(超)临界机组耐热钢分别在650~700℃进行高温时效,研究时效过程中显微组织结构和硬度的变化规律,建立硬度与Larson-Miller参数(P函数)间关系数学模型。结果表明,两种耐热钢的硬度均随时效温度升高显著降低;温度不变,随着时效时间的延长,HR3C耐热钢的硬度先增加后减小,而T92钢硬度单调下降,最后都趋于稳定。孪晶界消失以及晶界与晶内析出相的析出、长大是导致时效过程中两种耐热钢硬度变化的主要原因。采用线性拟合的方法,得到了时效耐热钢硬度与其P函数关系模型。基于相同P函数,计算所得时效钢硬度与测量的硬度吻合,该模型可用于服役耐热钢管服役寿命预测。

关键词(KeyWords)： 耐热钢;高温时效;硬度;P函数;服役寿命

Abstract:

Keywords:

基金项目(Foundation): 安徽省电力科学研究院技术开发基金([2011]QTXM1336)

作者(Author): 陈国宏,白小龙,刘俊建,王家庆,汤文明

DOI: 10.13289/j.issn.1009-6264.2014.s1.024

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