本文選題：鋁鋼復(fù)合材料 + 結(jié)合機(jī)理　； 參考：《廣東工業(yè)大學(xué)》2017年碩士論文

【摘要】：隨著科學(xué)技術(shù)的進(jìn)步,以及國(guó)家對(duì)于新材料領(lǐng)域的大力支持,使得復(fù)合材料在生產(chǎn)應(yīng)用和科學(xué)研究上均得到了快速發(fā)展。鋁鋼復(fù)合材料是最新興起的一種新型金屬層狀復(fù)合材料,原始的單一金屬已不能滿足工業(yè)上的性能要求。鋁鋼復(fù)合材料,既具有鋼的高強(qiáng)度、抗腐蝕和較美觀的外觀表面等特性,又有鋁的質(zhì)輕、延展性好和導(dǎo)熱性佳等特性,因此使得鋁鋼復(fù)合材料適用于更為廣泛的領(lǐng)域。同時(shí)吸引了大量研究者對(duì)鋁鋼復(fù)合材料的研究。但是國(guó)內(nèi)外研究者們大多圍繞鋁鋼復(fù)合材料的組織性能和制備工藝參數(shù)等方面展開(kāi)研究,很少有對(duì)鋁鋼復(fù)合材料結(jié)合機(jī)理研究方面的報(bào)道。因此,研究鋁鋼復(fù)合材料結(jié)合機(jī)理對(duì)進(jìn)一步揭露和認(rèn)識(shí)復(fù)合材料的結(jié)合行為具有重要意義,同時(shí)為生產(chǎn)實(shí)際提供理論性指導(dǎo)。為探究鋁鋼復(fù)合材料結(jié)合機(jī)理,選用了4A60鋁和08Al鋼為軋制材料,根據(jù)生產(chǎn)實(shí)際選用軋制“三步法”對(duì)4A60鋁和08Al鋼進(jìn)行軋制復(fù)合。借用表面輪廓儀、超景深、金相顯微鏡(OM)、掃描電鏡(SEM)、能譜儀(EDS)、X射線衍射(XRD)、萬(wàn)能試驗(yàn)機(jī)和納米探針等儀器設(shè)備。系統(tǒng)地研究了鋁鋼復(fù)合材料的冷軋結(jié)合行為,揭示了鋁鋼軋制結(jié)合機(jī)理,并分析了退火過(guò)程中金屬間化合物對(duì)鋁鋼復(fù)合界面結(jié)合性能的影響,以及探究了鋁鋼復(fù)合界面金屬間化合物的生長(zhǎng)行為和生長(zhǎng)動(dòng)力學(xué)。具體研究?jī)?nèi)容和研究結(jié)果如下:在軋制復(fù)合過(guò)程中,為研究鋁鋼界面的結(jié)合行為,獲得界面結(jié)合機(jī)理模型,采用不同的處理方式對(duì)鋼層表面進(jìn)行預(yù)處理,從壓下量、加工硬化程度、表面形貌和鋼層氧化四個(gè)方面展開(kāi)研究。分析鋁鋼復(fù)合界面和各剝離表面形貌的演變,并根據(jù)界面結(jié)合性能分析和探究軋制復(fù)合過(guò)程中的結(jié)合行為。結(jié)果表明:鋁鋼復(fù)合材料的軋制結(jié)合行為為,在軋制力的作用下,鋼層表面加工硬化層和氧化層率先發(fā)生破裂,暴露出無(wú)氧化的鋼層內(nèi)部新鮮金屬,對(duì)面較軟的鋁在壓力的作用下擠入裂縫產(chǎn)生機(jī)械咬合,當(dāng)壓力足夠大的時(shí)候,鋁與鋼層內(nèi)部暴露的新鮮金屬緊密接觸并形成穩(wěn)定的結(jié)合。研究發(fā)現(xiàn)在退火處理過(guò)程中,鋁鋼復(fù)合材料界面易生成脆性的金屬間化合物,且對(duì)界面結(jié)合性能產(chǎn)生嚴(yán)重的影響,從而研究了退火條件下鋁鋼界面金屬間化合物的生長(zhǎng)行為和生長(zhǎng)動(dòng)力學(xué)。結(jié)果表明:界面金屬間化合物的生長(zhǎng)規(guī)律符合拋物線特性,且界面金屬間化合物的厚度隨退火溫度的升高或保溫時(shí)間的延長(zhǎng)而增加。當(dāng)界面金屬間化合物的厚度超過(guò)9μm時(shí),界面結(jié)合強(qiáng)度急劇降低。
[Abstract]:With the progress of science and technology and the great support of the state in the field of new materials, the application of composite materials in production and scientific research have been developed rapidly. Aluminum steel composite is a new type of metal laminated composite material. The original single metal can not meet the requirements of industrial performance. Aluminum-steel composite has the characteristics of high strength, corrosion resistance and beautiful appearance, light weight, good ductility and good thermal conductivity of aluminum. Therefore, aluminum steel composite is suitable for a wide range of fields. At the same time, a large number of researchers have been attracted to the study of aluminum steel composites. However, researchers at home and abroad mostly focus on the microstructure, properties and fabrication process parameters of aluminum steel composites, and there are few reports on the bonding mechanism of aluminum steel composites. Therefore, it is of great significance to study the bonding mechanism of aluminum steel composites to further reveal and understand the bonding behavior of the composite materials, and to provide theoretical guidance for the production practice at the same time. In order to study the bonding mechanism of aluminum steel composite, 4A60 aluminum and 08Al steel were selected as rolling materials. According to the production practice, the 4A60 aluminum and 08Al steel were rolled by "three-step method". Surface profilometer, superfield depth, metallographic microscope, scanning electron microscope (SEM), energy dispersive spectrometer (EDS), X-ray diffraction (XRD), universal testing machine and nanometer probe were used. The cold rolling bonding behavior of aluminum steel composites was systematically studied, the bonding mechanism of aluminum steel rolling was revealed, and the effect of intermetallic compounds on the bonding properties of aluminum steel composite interface during annealing was analyzed. The growth behavior and growth kinetics of intermetallic compounds at Al-steel composite interface were also investigated. The specific research contents and results are as follows: in order to study the bonding behavior of aluminum steel interface during rolling, the interface bonding mechanism model is obtained. Work hardening degree, surface morphology and oxidation of steel layer were studied. The evolution of interface and peeling surface morphology of aluminum steel was analyzed, and the bonding behavior during rolling process was analyzed and explored according to the interface bonding properties. The results show that the rolling bonding behavior of aluminum steel composite is that, under the action of rolling force, the surface working-hardening layer and oxidation layer of the steel layer are first cracked, and the fresh metal inside the steel layer without oxidation is exposed. When the pressure is high enough, the aluminum contacts closely with the fresh metal exposed inside the steel layer and forms a stable bond. It is found that during annealing treatment, brittle intermetallic compounds are easily formed at the interface of Al-steel composites, which have a serious effect on the interfacial bonding properties. The growth behavior and growth kinetics of intermetallic compounds at the interface of aluminum steel under annealing conditions were studied. The results show that the growth of intermetallic compounds conforms to the parabola property and the thickness of intermetallic compounds increases with the increase of annealing temperature or the prolongation of holding time. When the intermetallic compound thickness exceeds 9 渭 m, the interfacial bonding strength decreases sharply.
【學(xué)位授予單位】：廣東工業(yè)大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2017
【分類(lèi)號(hào)】：TB331;TG335

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