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材料工程  2013 

X80管线钢埋弧焊接头冲击韧性及其断口形貌分析

DOI: 10.3969/j.issn.1001-4381.2013.06.010, PP. 50-54

Keywords: X80管线钢,焊接接头,冲击韧性,韧脆转变温度,断口形貌

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Abstract:

对X80管线钢埋弧焊焊接接头进行了-80~20℃温度范围的夏比冲击实验。测试了其冲击吸收功和脆性断面率,用扫描电镜观察了其断口形貌,分析了焊接接头断裂形式和断口形貌,讨论了焊接接头的韧脆转变温度和冲击断裂的力学行为。结果表明,室温时断口为韧窝状分布,焊接接头的韧脆转变温度为-28℃;断口形貌由韧性断裂向脆性断裂转变,断口主要表现为解理断裂。

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