李红英,胡继东,李阳华

• 1:中南大学材料科学与工程学院
• 2:衡阳华菱钢管有限公司

摘要(Abstract)：

研究了4种含不同微合金元素的X70管线钢的韧性,采用夏比冲击试验和落锤撕裂试验,借助金相显微镜(OM)、扫描电镜(SEM)与背散射电子衍射技术(EBSD)等手段,分析了微观组织、晶粒尺寸、晶粒取向及取向差和夹杂物等因素对X70管线钢韧性的影响。结果表明,含Mo、Ni元素的管线钢夏比冲击韧性和落锤性能都较好,含Cr元素的管线钢落锤性能偏低,大角度晶界比率越高,晶粒尺寸越细小,夹杂物含量越少的管线钢具有更高的韧性。

关键词(KeyWords)： X70管线钢;韧性;EBSD;晶粒尺寸;夹杂物

Abstract:

Keywords:

基金项目(Foundation): 湖南省重大科技专项(2008FJ1003)

作者(Author): 李红英,胡继东,李阳华

DOI: 10.13289/j.issn.1009-6264.2012.01.022

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