【摘要】：本文通過金相顯微鏡、顯微維氏硬度儀、萬能拉伸機(jī)、微分差熱分析儀(DSC)、電化學(xué)工作站以及覆膜法與抑菌環(huán)檢測方法,研究Cu、Ag復(fù)合,Zn、Ag復(fù)合,RE、Ag復(fù)合以及多種合金元素復(fù)合對Al-Mg-Si合金組織、力學(xué)性能、耐蝕性及抗菌性能的影響。研究發(fā)現(xiàn);Cu、Ag復(fù)合能夠細(xì)化Al-Mg-Si合金晶粒,提高合金硬度與抗拉強(qiáng)度,促進(jìn)合金中β″相的析出,降低β″相析出的激活能。B2合金(3%Cu、0.1%Ag)的β″相析出的激活能為46.5 kJ/mol,低于A合金(只含0.1Ag)β″相析出的激活能(58.6 kJ/mol)。在相同的時(shí)效條件下,Cu、Ag復(fù)合可縮短峰值出現(xiàn)的時(shí)間,提高峰值時(shí)效硬度。但Cu、Ag復(fù)合會(huì)降低合金耐蝕性,通過時(shí)效處理可提高合金的耐蝕性。Cu、Ag復(fù)合可提高Al-Mg-Si合金的抗菌性,時(shí)效處理后,B1合金(1%Cu、0.1%Ag)的抗菌率為98.6%,B2合金的抗菌率為99.5%。Zn、Ag復(fù)合能夠細(xì)化合金晶粒,提高合金硬度與抗拉強(qiáng)度,降低合金延伸率。在相同的時(shí)效條件下,提高Zn含量可縮短含Ag合金達(dá)到峰值硬度的時(shí)間,提高合金峰值時(shí)效硬度。Zn、Ag復(fù)合可促進(jìn)合金β″相的析出,降低β″相析出溫度。C2合金(3%Zn、0.1%Ag)β″相析出的激活能為EC2=51.2 kJ/mol,低于A合金β″相析出的激活能(EA=58.6kJ/mol)。隨著含Ag合金中Zn含量的增加,合金的耐蝕性降低。時(shí)效處理可提高Zn、Ag復(fù)合合金的耐蝕性。Zn、Ag復(fù)合可提高合金的抗菌性,隨著Zn含量的增加,合金的抗菌性提高,時(shí)效處理可進(jìn)一步提高合金的抗菌性,時(shí)效處理后,C1、C2合金的抗菌率分別為95.8%,97.2%。RE、Ag復(fù)合能夠細(xì)化合金晶粒,提高合金硬度與抗拉強(qiáng)度。當(dāng)RE含量過高時(shí),會(huì)導(dǎo)致合金晶粒粗化,合金性能下降。在相同的時(shí)效條件下,RE、Ag復(fù)合可提高合金峰值時(shí)效硬度,RE含量過高會(huì)導(dǎo)致合金的峰值時(shí)效硬度降低。RE、Ag復(fù)合可降低β″相析出的激活能,促進(jìn)β″相析出。D1合金(0.1%RE、0.1%Ag)β″相析出的激活能為ED1=53.5kJ/mol,低于A合金β″相析出的激活能,RE、Ag復(fù)合可提高合金中β′相與β相的析出溫度,抑制β′相與β相的析出。隨著合金中RE含量的增加,合金的耐蝕性提高。時(shí)效處理可進(jìn)一步提高合金的耐蝕性。RE、Ag復(fù)合可提高合金的抗菌性能,隨著合金中RE含量的增加合金的抗菌性提高。時(shí)效處理可進(jìn)一步提高合金的抗菌性,經(jīng)時(shí)效處理后,D1合金的抗菌率約為90.8%,D2合金的抗菌率約為93.4%。復(fù)合添加劑能夠細(xì)化Al-Mg-Si合金的晶粒,提高合金的力學(xué)性能,降低合金的耐蝕性,時(shí)效處理可提高合金的耐蝕性。復(fù)合添加劑促進(jìn)Al-Mg-Sig合金β″相的析出,降低相變溫度,降低β″相析出的激活能。E合金β″相析出的激活能為EE=48.6 kJ/mol,低于A合金β″相析出的激活能(EA=58.6 kJ/mol)。E合金的抗菌性較好,時(shí)效處理后E合金的抗菌率明顯高于其他組合金。
[Abstract]:In this paper, Cu,Ag composite, Zn,Ag compound, RE, were studied by metallographic microscope, microhardness tester, universal stretching machine, (DSC), electrochemical workstation, film mulching method and bacteriostasis ring detection method. Effects of Ag and multiple alloy elements on microstructure, mechanical properties, corrosion resistance and antibacterial properties of Al-Mg-Si alloys. Research findings; Cu,Ag composite can refine the grain size of Al-Mg-Si alloy, improve the hardness and tensile strength of the alloy, promote the precipitation of 尾 "phase in the alloy, and decrease the activation energy of the precipitation of 尾" phase. The activation energy of 尾 "phase precipitated by 0.1%Ag is 46.5 kJ/mol, lower than that of A alloy (0.1Ag only) 尾" phase (58.6 kJ/mol). Under the same aging condition, Cu,Ag compound can shorten the time of peak appearance and increase the peak age hardness. However, the corrosion resistance of Cu,Ag alloy can be reduced by aging treatment, and the corrosion resistance of Al-Mg-Si alloy can be improved by aging treatment. The antibacterial rate of 0.1%Ag is 98.6% and 99.5% respectively. The composite can refine the grain size, improve the hardness and tensile strength of the alloy, and decrease the elongation of the alloy. Under the same aging conditions, increasing the content of Zn can shorten the time of reaching peak hardness of the alloy containing Ag, and increase the peak age hardness of the alloy. Zn,Ag composite can promote the precipitation of 尾 "phase in the alloy." The activation energy of C _ 2 alloy (3ZnN _ (0.1) Ag) 尾 "phase precipitates is lower than that of A alloy's 尾" phase (EA=58.6kJ/mol). The corrosion resistance of Ag alloy decreases with the increase of Zn content. Aging treatment can improve the corrosion resistance of Zn,Ag composite alloy, Zn,Ag composite can improve the antibacterial property of the alloy, with the increase of Zn content, the antibacterial property of the alloy can be improved, and the aging treatment can further improve the antibacterial property of the alloy. The antibacterial rate of C2 alloy is 95.8% and 97.2%, respectively. The composite can refine the grain size of the alloy and improve the hardness and tensile strength of the alloy. When the content of RE is too high, the grain size of the alloy will be coarsened and the properties of the alloy will be decreased. Under the same aging condition, the peak aging hardness of the alloy can be increased by RE,Ag composite, and the peak aging hardness of the alloy will be decreased when the content of RE is too high. The activation energy of 尾 "phase precipitation can be decreased by RE,Ag composite. The activation energy of 尾 "phase precipitation in D1 alloy is lower than that in A alloy 尾" phase, and the activation energy of 尾 "phase precipitation in D1 alloy is lower than that in A alloy 尾" phase, and the activation energy of 尾 "phase precipitation in D1 alloy is lower than that in A alloy 尾" phase. The precipitation temperature of 尾 'phase and 尾 phase can be increased by Ag composite, and the precipitation of 尾' phase and 尾 phase can be inhibited. The corrosion resistance of the alloy increases with the increase of RE content. Aging treatment can further improve the corrosion resistance of the alloy, RE,Ag composite can improve the antibacterial properties of the alloy, and the antibacterial property of the alloy increases with the increase of the content of RE in the alloy. After aging treatment, the antibacterial rate of D1 alloy was about 90.8% and that of D2 alloy was 93.4%. The composite additive can refine the grain size of the Al-Mg-Si alloy, improve the mechanical properties of the alloy, and reduce the corrosion resistance of the alloy. The aging treatment can improve the corrosion resistance of the alloy. The composite additive can promote the precipitation of 尾 "phase in Al-Mg-Sig alloy, decrease the phase transition temperature and reduce the activation energy of 尾" phase precipitation. The activation energy of 尾 "phase precipitation in E alloy is EE=48.6 kJ/mol,." The activation energy of EA=58.6 kJ/mol). E alloy is lower than that of A alloy 尾 "phase. The antibacterial rate of aging treated E alloy is obviously higher than that of other combination gold.
【學(xué)位授予單位】：山東建筑大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2017
【分類號(hào)】：TG146.21

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本文編號(hào)：2313809