3Zr/A356鋁基復合材料（AMCs）。通過X射線衍射儀、掃描電子顯微鏡、能譜儀和顯微硬度測試，研究了不同鎢極氬?。═IG）焊焊接參數下焊接接頭的顯微組織和耐腐蝕性能。結果表明，當焊接電流為140 A時，焊縫成形最好，沒有氣孔或裂紋等焊接缺陷。焊接過程中生成細小的Al3Ti增強顆粒，呈球形和短棒狀，并分散在基體中。焊接接頭的硬度高于基體金屬的硬度，增強顆粒的強化效果明顯。隨著在3.5% NaCl溶液中的浸泡時間延長，焊縫的點蝕程度增加，且大多發(fā)生在晶界和強化相周圍。微區(qū)電化學實驗結果表明，當焊接電流為140 A時，腐蝕電位波動小，腐蝕傾向低，耐腐蝕性能最好。"/>

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TIG焊Al3Zr/A356復合材料的顯微組織特征和耐腐蝕性能
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1.江蘇科技大學 材料科學與工程學院，江蘇 鎮(zhèn)江 212000;2.深南電路股份有限公司，江蘇 無錫 214142;3.烏克蘭國家科學院金屬和合金物理技術研究所，烏克蘭 基輔 03115

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基金項目:

National Natural Science Foundation of China, No. 51605206


Microstructure Characterization and Corrosion Resistance of TIG-Welded Al3Zr/A356 Composites
Author:
Affiliation:

1.School of Materials Science and Engineering, Jiangsu University of Science and Technology, Zhenjiang 212000, China;2.Shennan Circuits Co., Ltd, Wuxi 214142, China;3.Phisico-technological Institute of Metals and Alloys of National Academy of Science of Ukraine, Kyiv 03115, Ukraine

Fund Project:

National Natural Science Foundation of China (51605206); Postgraduate Research & Practice Innovation Program of Jiangsu Province (SJCX21_1769, SJCX22_1941); Ministry of Science and Technology High-End Foreign Experts Introduction Program Project (G2022014043, G2022014134L)

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    摘要:

    通過原位反應法制備了增強相含量為3%（質量分數，下同）的Al3Zr/A356鋁基復合材料（AMCs）。通過X射線衍射儀、掃描電子顯微鏡、能譜儀和顯微硬度測試，研究了不同鎢極氬弧（TIG）焊焊接參數下焊接接頭的顯微組織和耐腐蝕性能。結果表明，當焊接電流為140 A時，焊縫成形最好，沒有氣孔或裂紋等焊接缺陷。焊接過程中生成細小的Al3Ti增強顆粒，呈球形和短棒狀，并分散在基體中。焊接接頭的硬度高于基體金屬的硬度，增強顆粒的強化效果明顯。隨著在3.5% NaCl溶液中的浸泡時間延長，焊縫的點蝕程度增加，且大多發(fā)生在晶界和強化相周圍。微區(qū)電化學實驗結果表明，當焊接電流為140 A時，腐蝕電位波動小，腐蝕傾向低，耐腐蝕性能最好。

    Abstract:

    The Al3Zr/A356 aluminum matrix composites (AMCs) with 3wt% reinforcing phase were prepared by in-situ reaction method. Through X-ray diffractometer, scanning electron microscope, energy dispersive spectrometer, and microhardness tests, the microstructures and corrosion resistance of the welded joints after tungsten inert gas (TIG) welding with different welding parameters were investigated. Results show that when the welding current is 140 A, the formation of weld seam is optimal, and no welding defects, such as pores or cracks, appear. The fine Al3Ti reinforcing particles are generated during the welding process, presenting the spherical and short rod shapes, and they are dispersed in the matrix. The hardness of the welded joint is higher than that of the base metal, and the strengthening effect of the reinforcing particles becomes obvious. With prolonging the immersion duration in 3.5wt% NaCl solution, the pitting degree of weld seam is aggravated, and the pitting mainly occurs around the grain boundaries and strengthening phases. The micro-area electrochemical experiment results show that when the welding current is 140 A, the corrosion potential fluctuation is small, the corrosion tendency is low, and the corrosion resistance is optimal.

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李惠,陸圣波,孫才智,韓旭東,沃洛德梅爾,謝列茨基.TIG焊Al3Zr/A356復合材料的顯微組織特征和耐腐蝕性能[J].稀有金屬材料與工程,2023,52(5):1616~1623.[Li Hui, Wang Feng, He Wei, Lu Shengbo, Sun Caizhi, Han Xudong. Microstructure Characterization and Corrosion Resistance of TIG-Welded Al3Zr/A356 Composites[J]. Rare Metal Materials and Engineering,2023,52(5):1616~1623.]
DOI：10.12442/j. issn.1002-185X. E20220021

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歷史
  • 收稿日期:2022-09-07
  • 最后修改日期:2023-02-08
  • 錄用日期:2023-02-21
  • 在線發(fā)布日期: 2023-05-31
  • 出版日期: 2023-05-29