本文采用真空浸渗技术,对铸造铝合金(ZL101A)针孔缺陷进行修复,并研究其修复后的综合性能.修复前后的试样分别进行显微组织及能谱分析、摩擦磨损实验、盐雾腐蚀试验等性能测试.研究结果表明:真空浸渗工艺后的铸铝合金表面针孔有效得到填充;摩擦磨损曲线更加平滑,摩擦系数0.61小于未浸渗试样的摩擦系数0.73;盐雾实验测试防腐等级由3级升到6级,表明真空浸渗修复工艺较好地提高了铸造铝合金的力学性能与防腐蚀性能.
In this paper,the pinholes of cast aluminum alloy were repaired by vacuum infiltration technology.And the comprehensive performance of the repaired were studied.Before and after vacuum infiltration,the samples were tested for their microstructure,energy spectrum analysis,friction and wear test and salt spray test.The results show that the casting aluminum alloy surface after vacuum infiltration technology was effectively got filled.The friction and wear curve is smoother,and the coefficient of friction is reduced from 0.73 to 0.61.Salt spray test corrosion protection grade is increased from 3 to 6.These figures show the vacuum infiltration repair process can improve the mechanical properties and corrosion resistance of cast aluminum alloy.
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