王若民,段谟刚,张健,陈国宏,陈学进,缪春辉,汤文明

• 1:安徽新力电业科技咨询有限责任公司
• 2:国网安徽省电力有限公司电力科学研究院
• 3:合肥工业大学材料科学与工程学院
• 4:国投宣城发电有限责任公司

摘要(Abstract)：

在服役态HR3C耐热钢管显微组织结构研究的基础上,比较有无缺口HR3C耐热钢管试样的拉伸性能及断口形貌的差异,评价服役态HR3C耐热钢的缺口敏感性。结果表明:605℃服役导致HR3C耐热钢中奥氏体晶粒长大,在奥氏体晶界、孪晶界析出M_(23)C_6,导致其强度增加,塑性下降。缺口导致供货态及服役态HR3C耐热钢抗拉强度及伸长率下降,但屈服强度增大。随着服役时间的延长,伴随着组织老化,服役态HR3C耐热钢的缺口敏感性增加。HR3C耐热钢管表面划伤造成尖端应力集中,导致服役态HR3C耐热钢管强度损失严重,甚至爆管失效。

关键词(KeyWords)： HR3C耐热钢管;显微组织;拉伸性能;缺口敏感性

Abstract:

Keywords:

基金项目(Foundation): 安徽新力电业科技咨询有限责任公司科研项目(2016咨-CL-01)

作者(Author): 王若民,段谟刚,张健,陈国宏,陈学进,缪春辉,汤文明

DOI: 10.13289/j.issn.1009-6264.2020-0126

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