【摘要】：金屬層合板作為可以充分發(fā)揮并且利用好各組元層的金屬性能的這樣一種材料，目前受到了多個(gè)行業(yè)的青睞。作為“可再生資源”的鎂合金，其自身的優(yōu)點(diǎn)使其有十分廣泛的應(yīng)用面，，但是其自身較差的耐蝕性限制了本身的發(fā)展。而鋁合金的綜合性能較好，更重要的是其有很好的耐腐蝕的性能，若將二者結(jié)合將會(huì)大大提高兩種材料的使用范圍，使其性能更優(yōu)，用途更廣。5052/AZ31/5052鎂鋁層合板作為新型復(fù)合型材料有著廣闊的應(yīng)用前景。本文考慮到層合板的組元層對(duì)層合板性能影響尤為重要，并且組元層所占比重不同會(huì)對(duì)層合板的成形性能有一定影響，所以本文主要研究了兩種厚度比下的鎂鋁層合板的力學(xué)性能和拉深性能，以此作為指導(dǎo)可以對(duì)鎂鋁層合板的設(shè)計(jì)制備提供一定借鑒。 本文首先研究了兩種厚度比的層合板在四道次熱軋成形下得到的厚度比和變形情況。研究表明：不同厚度比的鎂鋁層合板軋制后的表現(xiàn)均為鎂板的變形比鋁板變形更為容易，所以鎂板的變形量占總變形量的比重較大，軋制過后鋁板相對(duì)于鎂板占層合板的比重上升，并且當(dāng)鋁板厚度由0.7mm變?yōu)?.38mm時(shí)，鋁板趨于接近難變形區(qū)。 其次通過對(duì)比兩種不同厚度比的鎂鋁層合板的力學(xué)性能基本參數(shù)和微觀組織來比較何種厚度比的板材性能更好。試驗(yàn)結(jié)果表明：在室溫條件下厚度比為1:4:1的層合板綜合力學(xué)性能優(yōu)于厚度比為1:7:1的層合板，表現(xiàn)在前者屈強(qiáng)比小，延伸率高，并且硬度值也略高，但是在加熱溫度200℃時(shí)，厚度比為1:7:1的層合板力學(xué)性能得到明顯提高并且超過了厚度比為1:4:1的層合板。然而，在微觀組織方面，不同厚度比的層合板的結(jié)合界面層和組織形貌呈現(xiàn)基本一致的情況。 最后通過比較兩種厚度比的層合板在室溫、200℃和230℃三種成形溫度下的極限拉深比、拉深件的硬度以及最大減薄率等指標(biāo)，對(duì)比分析了組元層厚度比對(duì)層合板拉深性能的影響。試驗(yàn)結(jié)果得知：在室溫下，厚度比為1:4:1的層合板表現(xiàn)出更好的成形性能，其極限拉深比為1.32；然而在成形溫度為200℃和230℃時(shí)，厚度比為1:7:1的層合板表現(xiàn)出更好的成形性能，在200℃時(shí)，其極限拉深比達(dá)到3.1優(yōu)于厚度比為1:4:1得到的2.9，230℃時(shí)，厚度比為1:7:1的層合板的極限拉深比為3.0，同樣高于1:4:1的2.7，并且溫度升高，兩種厚度比的層合板拉深能力相差值增大。可見鋁合金在鎂鋁層合板中的占比不同會(huì)明顯影響層合板在不同成形溫度下的拉深性能。
[Abstract]:As a kind of material which can make full use of the metal properties of each element layer, metal laminate has been favored by many industries at present. Magnesium alloy, as a "renewable resource", has a wide range of applications due to its own advantages, but its poor corrosion resistance limits its own development. The comprehensive performance of aluminum alloy is better, and more important is that it has good corrosion resistance. The combination of the two materials will greatly improve the scope of use of the two materials, and make its properties better. 5052 / AZ31/5052 magnesium-aluminum laminate has a wide application prospect as a new composite material. In this paper, it is considered that the component layers of laminated plates are particularly important to the performance of laminated plates, and the different proportion of constituent layers will affect the formability of laminated plates to a certain extent. Therefore, the mechanical properties and drawing properties of magnesium-aluminum laminates with two thickness ratios are studied in this paper, which can be used as a reference for the design and preparation of magnesium-aluminum laminates. In this paper, the thickness ratio and deformation of two kinds of laminates with different thickness ratios are studied under four-pass hot rolling. The results show that the deformation of magnesium-aluminum laminate with different thickness ratio is easier than that of aluminum plate after rolling, so the deformation of magnesium-aluminum laminate is larger than that of aluminum plate, so the deformation of magnesium-aluminum laminate is larger than that of aluminum plate. After rolling, the proportion of aluminum plate to magnesium plate in laminate increases, and when the thickness of aluminum plate changes from 0.7mm to 0.38mm, the aluminum plate tends to approach the hard deformation region. Secondly, the mechanical properties and microstructure of two kinds of mg-Al laminates with different thickness ratios are compared to compare the thickness ratio of the plates with better mechanical properties. The experimental results show that the composite mechanical properties of the laminates with the thickness ratio of 1:4:1 at room temperature are better than those of the laminates with the thickness ratio of 1:7:1. The former has the advantages of smaller yield to strength ratio, higher elongation, and slightly higher hardness value than that of the laminates with the thickness ratio of 1:7:1. However, at the heating temperature of 200 鈩

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