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深冷溫度對AZ31鎂合金CMT接頭耐蝕性的影響
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太原科技大學,太原科技大學,太原科技大學,太原科技大學,太原科技大學,太原科技大學

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TG146.2

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山西省基礎研究項目(201601D011036)；山西省基礎研究項目(青年基金)(2015021130)；科大博士啟動基金(20122045)；科大博士后基金（20152031）


Effect of Cryogenic Treatment Temperature on Corrosion Resistance of AZ31 Magnesium Alloy CMT Weld Joint
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Taiyuan University of Science and Technology,Taiyuan University of Science and Technology,Taiyuan University of Science and Technology,Taiyuan University of Science and Technology,Taiyuan University of Science and Technology,Taiyuan University of Science and Technology

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    摘要:

    采用電化學方法研究了深冷處理溫度對AZ31鎂合金CMT(Cold Metal Transfer)焊接接頭腐蝕行為的影響。結(jié)果表明:與未深冷時相比,經(jīng)-100℃/4 h、-140℃/4 h、-180℃/4 h三組參數(shù)深冷處理后的接頭焊縫區(qū)耐蝕性能得到不同程度提高,隨著深冷溫度降低,耐蝕性能呈先升高后下降的趨勢變化,深冷處理對焊縫區(qū)中第二相的尺寸、含量及分布的改變是決定這一趨勢的關(guān)鍵因素。其中經(jīng)-140℃/4h深冷處理的焊縫區(qū)電荷轉(zhuǎn)移電阻和腐蝕產(chǎn)物膜電阻最大,腐蝕電流最低,耐蝕性能最佳。

    Abstract:

    Effect of cryogenic treatement temperature to corrosion behavior of AZ31 magnesium cold metal transfer(CMT) weld joint was studied by adopting electrochemical method.Result was that compared to non-cryogenic joint,the corrosion resistance of joints that were cryogenic treated under -100℃/4h,-140℃/4h,-180℃/4h were increased to a different extent.With the temperature decrease,the corrosion resistances show a downward curve after the initial raise.Critical cause of this trend are the change of the size,quantity and distribution of the second phase caused by cryogenic treatment. The weld zone that was cryogenic treated under -140℃/4h shows the best corrosion resistance because the charge transfer resistance and corrosion product film resistance of that reaches maximum and the corrosion current of that reaches minimum.

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陳金秋,吳志生,崔超,趙菲,帥朋,韓宇.深冷溫度對AZ31鎂合金CMT接頭耐蝕性的影響[J].稀有金屬材料與工程,2018,47(5):1543~1549.[Chen Jinqiu, Wu Zhisheng, Cui Chao, Zhao Fei, Shuai Peng, Han Yu. Effect of Cryogenic Treatment Temperature on Corrosion Resistance of AZ31 Magnesium Alloy CMT Weld Joint[J]. Rare Metal Materials and Engineering,2018,47(5):1543~1549.]
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  • 收稿日期:2017-04-06
  • 最后修改日期:2017-06-06
  • 錄用日期:2017-06-23
  • 在線發(fā)布日期: 2018-06-08
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