| 高强钢焊接接头CTOD试验允许值与离散性问题探讨 |
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| 引用本文： | 牛利娜,陈小娟,苗张木.高强钢焊接接头CTOD试验允许值与离散性问题探讨[J].武汉水运工程学院学报,2013(6):1355-1359. |
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| 作者姓名： | 牛利娜 陈小娟 苗张木 |
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| 作者单位： | 武汉理工大学交通学院,武汉430063 |
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| 基金项目： | 国家工业与信息化部项目资助（批准号：工信部装[2009]382号） |
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| 摘 要： | 对EQ70高强钢焊接接头进行了低温CTOD试验（-10℃），用局部压缩法和高K比法保证了疲劳裂纹前沿平直度，但熔合线试样的试验结果较差且具有较大分散性，增加试样个数之后分散性也没有得到改善。不同的预疲方法得到的结果不同，认为应该规定不同的允许值。另外，提出了统一化标准法，为今后接头试样（尤其是熔合线试样）的CTOD试验评定方法提供思路，作为解决离散性等问题的方向。
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| 关 键 词： | 高强钢 焊接接头 CTOD 允许值 统一化标准法 |
Research on acceptable value and scatter of CTOD tests on high strength weld butt joints |
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| Authors: | NIU Lina CHEN Xiaojuan MIAO Zhangmu |
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| Institution: | (School of Transportation, WHUT, Wuhan 430063,China) |
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| Abstract: | CTOD tests are carried out on high strength steel-EQ70 weld butt joints in low temperature（-10℃）。Method of local compression and high K ratio is used to ensure qualify weld specimens ratio. But results show lower CTOD values and bigger scatter which is not improved after more tests. Values from different pre-cracking methods will be different, and different acceptable values should be used, which is studied. Besides, as scatters exist, Method of unified standards are introduced which will acts as a way of assessment of CTOD, especially for specimens of fusion line. |
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| Keywords: | high-strength steel weld butt joint CTOD acceptable value method of unified standards |
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