A5083鋁合金焊縫缺陷渦流檢測及缺陷評級
[Abstract]:A5083 aluminum alloy and its welded joints have important applications in industry. At present, multi-pass MIG welding is often used, which inevitably leads to various defects in the welding process. The multi-frequency eddy current testing technique can be used to study the signal regularity of these defects. At the same time, the BS7910-2005 standard is used to evaluate the defects and determine the quality grade of welded joints, which provides the basic data for the structural design of welded joints with defects. Firstly, the multi-frequency eddy current technique is used to detect the defects in different weld joints (butt, lap, corner) and different surface states (grinding, unpolished) in different directions and depths, and the morphological characteristics of the defect signals are analyzed. The variation rule of signal amplitude is studied in detail. At the same time, the welding joint with cracks and pores was successfully manufactured by reasonable method, and the quality of the joint was tested and judged. For the samples with different joint types or different surface states, the surface defects are basically "impeller" characteristics, and the "impeller" shape characteristics of the near surface defect signals are not obvious, and the signal irregularity is greater. This is due to the influence of machining accuracy of buried defects. There is obvious entanglement in the local signal of weld surface defects in corner joints, but not in butt welds. In addition to the butt joint of surface grinding profile, the amplitude of longitudinal defect signal of joints with different surface states is more concentrated, while the amplitude difference of transverse defect is relatively large in different types of joints. With the increase of groove depth, the amplitude of defect signal increases, and the amplitude of transverse buried defect signal is smaller than that of transverse surface defect signal. In different joint types, except for transverse buried defects, the defect signal amplitude of butt weld is the largest, which is obviously different from that of lap weld and fillet weld. For transverse defects of specimens with different surface states, the signal amplitude of weld grinding state is higher than that of non-grinding state, while the longitudinal defect signal shows opposite rule. The quality grade of weld seam of standard specimen, crack specimen and gas hole specimen is evaluated. The results are Q2, Q2 and Q3.The results are as follows: Q2, Q3.
【學位授予單位】:西南交通大學
【學位級別】:碩士
【學位授予年份】:2017
【分類號】:TG115.28
【參考文獻】
相關(guān)期刊論文 前10條
1 張巍;;一種用于鋁合金材料的多頻渦流測試技術(shù)[J];世界有色金屬;2016年16期
2 周林軍;;基于斷裂力學的焊接接頭缺陷評定及規(guī)范[J];石油和化工設(shè)備;2015年09期
3 師俊杰;邵季飛;石家銘;;電磁無損檢測技術(shù)在電力生產(chǎn)中的應用[J];科技資訊;2015年20期
4 孫吉;;10CrNi3MoV船體鋼焊縫斷裂韌度的試驗研究[J];電焊機;2013年09期
5 薛楠;董麗虹;徐濱士;張之敬;王慧鵬;;四通道多頻渦流定量評價曲軸圓角疲勞裂紋深度的試驗研究[J];北京理工大學學報;2013年07期
6 楊斌;張利欣;金瑩;孫冬柏;;工程材料失效檢測技術(shù)現(xiàn)狀及發(fā)展趨勢[J];機械設(shè)計與制造;2012年11期
7 林俊明;;淺析多頻渦流與脈沖渦流檢測技術(shù)間的關(guān)系[J];無損檢測;2012年03期
8 高軍哲;潘孟春;羅飛路;陳棣湘;;譜分析型多頻渦流檢測的信號處理方法研究[J];電子測量與儀器學報;2011年01期
9 張東利;陳振茂;武美先;毛贏;;多頻渦流裂紋重構(gòu)方法及其在金屬夾芯板焊部裂紋定量檢測中的應用[J];無損檢測;2010年08期
10 高軍哲;潘孟春;羅飛路;;基于最小二乘法的多頻渦流檢測信號參數(shù)分析[J];測試技術(shù)學報;2010年02期
相關(guān)博士學位論文 前3條
1 李曰兵;基于概率分析的反應堆壓力容器缺陷評定方法[D];浙江工業(yè)大學;2014年
2 何峗澤;電磁無損檢測缺陷識別與評估新方法研究[D];國防科學技術(shù)大學;2012年
3 高軍哲;多頻渦流無損檢測的干擾抑制和缺陷檢測方法研究[D];國防科學技術(shù)大學;2011年
相關(guān)碩士學位論文 前9條
1 李巖松;脈沖渦流檢測頻域特征提取與缺陷表征研究[D];廈門大學;2014年
2 依秀平;紫銅焊接接頭組織與高周疲勞性能的研究[D];東北大學;2013年
3 續(xù)曉君;焊接結(jié)構(gòu)可靠性評定系統(tǒng)研究[D];哈爾濱工業(yè)大學;2009年
4 陳寧;基于多頻電渦流檢測方法的多參數(shù)測量分析與研究[D];西安理工大學;2009年
5 馮婷婷;雙頻渦流無損檢測關(guān)鍵技術(shù)研究[D];國防科學技術(shù)大學;2008年
6 劉明;大型壓力管道焊接缺陷的強度分析與安全評定[D];西南交通大學;2008年
7 盧黎明;未焊透缺陷壓力管道安全評定工程方法研究[D];南昌大學;2006年
8 黃越雯;電渦流檢測在電機鐵芯生產(chǎn)過程中的應用[D];浙江大學;2004年
9 黃誠;焊接缺陷斷裂的可靠性評定[D];大連理工大學;2002年
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