3Zr/A356鋁基復(fù)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(shù)下焊接接頭的顯微組織和耐腐蝕性能。結(jié)果表明，當(dāng)焊接電流為140 A時(shí)，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(xì)小的Al3Ti增強(qiáng)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(qiáng)顆粒的強(qiáng)化效果明顯。隨著在3.5% NaCl溶液中的浸泡時(shí)間延長，焊縫的點(diǎn)蝕程度增加，且大多發(fā)生在晶界和強(qiáng)化相周圍。微區(qū)電化學(xué)實(shí)驗(yàn)結(jié)果表明，當(dāng)焊接電流為140 A時(shí)，腐蝕電位波動小，腐蝕傾向低，耐腐蝕性能最好。;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."/>