固溶处理对Mg-Al-Zn系合金组织及耐腐蚀的性能的影响.doc

PAGE 摘 要 论述了Mg-Al-Zn系合金经过固溶处理后组织和耐腐蚀性能的变化。通过观察经固溶处理后的组织及塔菲尔曲线，对Mg-Al-Zn系合金固溶处理后的组织和电化学腐蚀行为进行了研究。结果表明，经过固溶处理后的镁合金显微组织晶粒长大明显，β-（Mg17Al12）相部分溶解在基体组织中，在温度达到560度以上时，组织发生过烧现象。与未经处理镁合金的耐腐蚀性能相比，经过固溶处理后的镁合金耐腐蚀性能无明显增加。 关键词：镁合金；固溶处理；显微组织；耐腐蚀性能 Title: Solution Treatment on Mg-Al-Zn alloys organizations and the impact of corrosion resistance Abstract Discusses the Mg-Al-Zn alloy after solution treatment and corrosion resistance after the organization changes. By observing the organization after solution treatment and the Tafel curves of Mg-Al-Zn alloy after solution treatment and electrochemical corrosion behavior was studied. The results showed that, after the magnesium alloy after solution treatment microstructure grain growth significantly, β-(Mg17Al12) phase partially dissolved in the matrix organization, in the temperature reaches 560 degrees, the tissue over-burning phenomenon. With untreated corrosion resistance of magnesium alloys compared to that after the magnesium alloy after solution treatment did not increase the corrosion resistance. Keywords： Magnesium alloy；Microstructure；Corrosion resistance  目录 TOC \o 1-4 \h \u HYPERLINK \l _Toc295479717 目录 PAGEREF _Toc295479717 \h 3 HYPERLINK \l _Toc295479718 第一章 绪论 PAGEREF _Toc295479718 \h 4 HYPERLINK \l _Toc295479719 1.1 选题的目的与意义 PAGEREF _Toc295479719 \h 4 HYPERLINK \l _Toc295479720 1.2 镁合金 PAGEREF _Toc295479720 \h 5 HYPERLINK \l _Toc295479721 1.2.1 镁合金的发展 PAGEREF _Toc295479721 \h 5 HYPERLINK \l _Toc295479722 1.2.2 镁合金的性能及应用 PAGEREF _Toc295479722 \h 6 HYPERLINK \l _Toc295479723 镁合金在汽车上的应用： PAGEREF _Toc295479723 \h 6 HYPERLINK \l _Toc295479724 镁合金在3C产品上的应用： PAGEREF _Toc295479724 \h 7 HYPERLINK \l _Toc295479725 1.2.3 镁合金的种类及发展趋势 PAGEREF _Toc295479725 \h 7 HYPERLINK \l _Toc295479726 镁合金的种类 PAGEREF _Toc295479726 \h 7 HYPERLINK \l _Toc295479727 镁合金的发展趋势 PAGEREF _Toc295479727 \h 8 HYPERLINK \l _Toc295479728 1.3 合金元素对镁合金组织和力学性能的影响 PAGEREF _Toc295479728 \h 10 HYPERLINK \l _Toc295479729 1.3.1 镁合金主