殷凤仕,杨钢,李茹,田丽倩,徐振

• 1:山东理工大学机械工程学院
• 2:钢铁研究总院
• 3:北京北重汽轮电机有限责任公司

摘要(Abstract)：

试验研究了X12CrMoWVNbN10-1-1耐热钢的显微组织和高温力学性能。结果表明:该钢经1075℃#1 h油冷淬火+570℃×4 h,空冷一次回火+720℃×2 h,空冷二次回火后的显微组织为典型的回火板条状马氏体组织,在原奥氏体晶界和板条界分布M23C6型碳化物,在马氏体板条内分布有纳米尺寸的MX相,此外还有少量在淬火加热时未溶解的尺寸达到0.6μm的残余MX相;在500～650℃范围内抗拉强度和屈服强度随试验温度的升高而降低,伸长率和断面收缩率随试验温度的升高而升高;持久强度与Larson-Miller参数P=T(25+lg(tf))/1000之间符合抛物线关系。

关键词(KeyWords)： X12CrMoWVNbN10-1-1耐热钢;蠕变;持久强度

Abstract:

Keywords:

基金项目(Foundation): 国家高技术研究发展计划(863)项目资助(2009AA03Z509)

作者(Author): 殷凤仕,杨钢,李茹,田丽倩,徐振

DOI: 10.13289/j.issn.1009-6264.2012.12.015

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