發(fā)布時(shí)間：2018-04-18 19:40

  本文選題：Deform-3D + 鋁合金箔軋　； 參考：《北方工業(yè)大學(xué)》2017年碩士論文

【摘要】：在鋁合金箔材的軋制過程中,鋁合金箔材的表面質(zhì)量主要受到黏度、添加劑含量、和坯料潔凈度的影響。與此同時(shí),有的雜質(zhì)元素是固定存在于工業(yè)純鋁中,但有些雜質(zhì)元素是刻意添加進(jìn)去的,就像Ti和B是作為晶粒細(xì)化劑添加進(jìn)去的。雖然這些雜質(zhì)元素的含量很低,但對(duì)箔材的各種性能產(chǎn)生影響。在工業(yè)純鋁中總是會(huì)存在著FeSiAl化合物,在冷軋制過程中幾乎不會(huì)發(fā)生種類、形態(tài)和個(gè)數(shù)的變化,這些會(huì)保存到最后的鋁合金箔材產(chǎn)品中,但第二相的類型、粒徑、形狀、區(qū)域分布、顆粒數(shù)量等卻會(huì)對(duì)材料的強(qiáng)度、加工的性能、耐疲勞性以及耐腐蝕性等性能產(chǎn)生重要的影響。第二相顆粒與潤(rùn)滑油膜之間在箔材軋制的過程中的相互作用還是未知,本文旨在探究在鋁合金箔材軋制過程中,第二相顆粒與潤(rùn)滑油膜的相互作用機(jī)理。本文的計(jì)算基于有限元軟件Deform-3D,研究發(fā)現(xiàn)當(dāng)?shù)诙囝w粒的硬度值與基體硬度值的比接近的時(shí)候(硬度比接近于1),第二相顆粒對(duì)位錯(cuò)的阻礙作用類似于位錯(cuò)切割機(jī)制。當(dāng)?shù)诙囝w粒的硬度值與基體硬度值的比介于1-6之間時(shí),第二相顆粒對(duì)基體的強(qiáng)化機(jī)制從位錯(cuò)切割機(jī)制向奧羅萬強(qiáng)化機(jī)制轉(zhuǎn)變。當(dāng)?shù)诙囝w粒的硬度值與基體硬度值的比高于6的時(shí)候,第二相顆粒對(duì)位錯(cuò)的阻礙運(yùn)動(dòng)完全變成了奧羅萬強(qiáng)化機(jī)制。第二相顆粒在軋制過程中從基體中的暴露時(shí)間與顆粒深度呈線性關(guān)系,位錯(cuò)機(jī)制也會(huì)隨著第二相顆粒距離基體表面深度的變化而變化,當(dāng)?shù)诙囝w粒距離基體表面較近或是較遠(yuǎn)時(shí),隨軋制的進(jìn)行第二相顆粒沒有破碎。處于2-4 μ m之間的第二相顆粒隨著壓下量的增加會(huì)破碎。
[Abstract]:In the process of aluminum foil rolling, the surface quality of aluminum alloy foil is mainly affected by viscosity, additive content and blank cleanliness.At the same time, some impurity elements are fixed in industrial pure aluminum, but some impurity elements are added deliberately, just as Ti and B are added as grain refiners.Although the content of these impurity elements is very low, it has an effect on the properties of chaff.In industrial pure aluminum, there are always FeSiAl compounds. During cold rolling, there will be almost no change in type, shape and number. These will be preserved in the final aluminum foil products, but the type, size, shape of the second phase,The regional distribution and the number of particles have an important effect on the strength, processing performance, fatigue resistance and corrosion resistance of the material.The interaction between the second phase particle and lubricating oil film in foil rolling is still unknown. This paper aims to explore the interaction mechanism between the second phase particle and lubricating oil film in the process of aluminum alloy foil rolling.Based on the finite element software Deform-3D, it is found that when the hardness ratio of the second phase particle is close to that of the matrix (the hardness ratio is close to 1), the hindrance of the second phase particle to the dislocation is similar to that of the dislocation cutting machine.When the ratio of the hardness of the second phase particle to the matrix hardness value is between 1-6, the strengthening mechanism of the second phase particle to the matrix changes from dislocation cutting mechanism to Orovan strengthening mechanism.When the ratio of hardness value of the second phase particle to that of the matrix hardness value is higher than 6, the hindering movement of the second phase particle's dislocation becomes the mechanism of Orovan strengthening completely.The exposure time of the second phase particle in the rolling process is linearly related to the particle depth, and the dislocation mechanism changes with the change of the depth of the second phase particle from the surface of the matrix.When the second phase particle is near or far from the substrate surface, the second phase particle does not break with rolling.The second phase particles in the range of 2-4 渭 m will break up with the increase of reduction.
【學(xué)位授予單位】：北方工業(yè)大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2017
【分類號(hào)】：TG339

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