| 引用本文: | 邢海燕,徐敏强,陈鑫彧,秦萍.焊缝两种典型缺陷的磁记忆特征对比[J].材料科学与工艺,2011,19(6):65-69.DOI:10.11951/j.issn.1005-0299.20110612. |
| XING Hai-yan,XU Min-qiang,CHEN Xin-yu,QIN Ping.Two kinds of welded joint typical defects comparison based on MMM characteristics[J].Materials Science and Technology,2011,19(6):65-69.DOI:10.11951/j.issn.1005-0299.20110612. |
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| 摘要: |
| 为了将金属磁记忆检测技术应用于焊缝不同典型缺陷的定性和定量评价上,对Q235钢未焊透和固体夹渣两种缺陷进行实验研究,通过比较0、150和230 kN不同载荷级别下的磁记忆信号检测结果,提取了焊缝未焊透和夹渣两种缺陷的不同磁记忆信号特征,结果表明,未焊透的磁记忆特征信号波宽D的变化更为突出,而固体夹渣的磁记忆特征信号梯度K变化明显,并进一步从磁记忆机理的角度加以推导分析.分别以相应载荷级别下焊缝X射线检测结果作为依据,验证了磁记忆特征信号在焊缝缺陷种类确定和缺陷严重程度定量评价上的可行性与有效性. |
| 关键词: 磁记忆检测 焊缝缺陷 信号特征 |
| DOI：10.11951/j.issn.1005-0299.20110612 |
| 分类号:TG441.7 |
| 基金项目:黑龙江省教育厅普通高等学校青年学术骨干支持计划项目(1155G02) |
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| Two kinds of welded joint typical defects comparison based on MMM characteristics |
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XING Hai-yan1,2, XU Min-qiang2, CHEN Xin-yu1, QIN Ping1
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1.School of Mechanical Science and Engineering,Northeast Petroleum University,Daqing 163318,China;2.School of Astronautics,Harbin Institute of Technology,Harbin 150001,China
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| Abstract: |
| To evaluate welded joint defects qualitatively and quantitatively,the signal characteristics of metal magnetic memory(MMM) is investigated by comparing experiments between weld lacking of penetration and weld slag inclusion.The experiments were carried out on DSS-10T-S tension testing machine.Given are the MMM signal rules of the two kinds of welded defects under different tension loading level 0,150 kN and 230 kN.The experiment results show that,for the weld lacking of penetration specimens,the MMM peak amplitude ΔHp and the peak width D adds along with load increasing.As for the weld slag inclusion specimens,the ΔHp and K enhances along with load increasing,but the D varies a little.Comparing the two kinds of weld defects,the MMM gradient K is more sensitive to weld lacking of penetration than weld slag inclusion defects,but the peak width D is on the reverse.For a more step,the X ray examinations under the same loading levels were studied,which showed the feasibility and effective of MMM quantitative evaluation on damage degree of welded joint defects. |
| Key words: metal magnetic memory testing welding defects signal characteristic |
