共查询到19条相似文献,搜索用时 88 毫秒
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在两种不同的铸模中铸造成形一种新型铝青铜合金,在奥林巴斯金相显微镜下观察其组织并采用40MVDTM型维氏硬度计测定合金硬度,采用D8ADVANCE型X射线衍射仪测定试样的相组成,采用JSM6390LV型扫描电镜及其配备的能谱仪进行形貌观察及微区成分分析,随后采用自制MPX-2000型盘销式摩擦磨损试验机考察了该铸造铝青铜的摩擦磨损性能,并简单探讨了其摩擦磨损机理。实验结果表明,采用金属型铸造成形的合金组织及综合力学性能较好;在相同滑动速度下,实验载荷对铸造铝青铜合金的干摩擦系数和磨损率的影响十分明显。 相似文献
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提出了一种冷喷涂辅助原位合成高铝青铜合金涂层的方法,使用该方法在45~#钢基体上制备了高铝青铜涂层。通过SEM、EDS、XRD分析涂层微观形貌和物相组织;采用销-盘式摩擦磨损试验机测试涂层的摩擦磨损性能;用CHI660D电化学测试系统测合金涂层耐腐蚀性能。结果表明:冷喷涂辅助原位合成高铝青铜合金涂层的组织是以β相、α相、γ_2相和k相为主的典型高铝青铜合金组织。原位合成的高铝青铜合金涂层结构致密、孔隙率低,具有良好的机械性能和耐磨、耐腐蚀性能,与铸态块体高铝青铜合金的性能接近。涂层的硬度(HV)为3570 MPa,与氧化铝的干摩擦系数为0.320。在3.5%Na Cl和5.0%H_2SO_4(质量分数)腐蚀介质中的稳定电压分别为-366和-387 m V。 相似文献
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新型铝青铜及其喷涂层中Ce元素的作用(英文) 总被引:2,自引:0,他引:2
采用一次共装熔炼、砂型铸造Al含量超过Cu-Al二元合金共析点的新型铝青铜合金Cu-14Al-4.5Fe,在45#中碳钢表面制备铝青铜等离子喷涂层。通过扫面电镜、X射线衍射分析、电子探针、透射电镜和显微硬度计分析Ce元素对新型铝青铜合金及喷涂层表面组织形貌和维氏硬度的影响。结果表明:添加0.6%Ce到铸态合金及喷涂层可以使细化的κ相均匀分布于基体,并提高材料硬度。等离子喷涂层快速凝固,保留铝青铜涂层中Fe元素的过饱和固溶体,避免生成(α+γ2)共析相。含Ce喷涂层中的堆垛层错是提高材料力学性能的因素。 相似文献
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Al—Pb—Cu减摩合金的研制 总被引:2,自引:1,他引:1
本文采用正交试验等方法,设计了Al—Pb—Cu减摩合金的成分和组织,研制了一种新型铝基减摩合金。 试验结果表明,该合金可代替锡青铜制得轴瓦、轴套类滑动配件,铸件成本比ZQSn6-6-3减少4/5。 相似文献
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应用电化学测试手段,针对20、2Cr13、QAl 9-2、QA
l 10-3-15和QAl 10-4-4五种材料试件,分别测定了它们在NaCl溶液中的腐蚀电位及与QAl 9-2偶接时的电偶腐蚀电流的变化.并对几种铝青铜材料和QAl 9-2构成的摩擦副进行了摩擦磨损性能分析.结果表明,铝青铜材料的抗腐蚀性比钢好.其中QAl 10-4-4的腐蚀电位最为偏正,但它与QAl 9-2配副会对QAl 9-2产生较大的阳极电偶腐蚀;QAl 9-2与QAl 9-2相配时的电偶腐蚀最小,但其摩擦相溶性最差;而QAl 9-2与QAl 10-3-15材料副的抗电偶腐蚀能力和摩擦相溶性均佳. 相似文献
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Preparation, mechanical properties and wear behaviors of novel aluminum bronze for dies 总被引:8,自引:0,他引:8
1 Introduction The materials currently used for precise stretching and squeezing dies are the cast-iron alloys, such as Cr12, W18Cr4V, 35CrMo steels and other hardened alloys. However, a bonding phenomenon often occurs during the squeezing and stretching… 相似文献
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Aluminium oxide films may be electrolytically treated in order to modify or enhance their physical characteristics, with electrocolouring being the common application. This research has shown that the incorporation of a metallic deposit into the porous oxide film can also improve the tribological properties of the film using methodology similar to electrocolouring. Performance of this coating system has been evaluated for two common aluminium alloys using standard mechanical tests, LIMA surface analysis and electron microscopy. Such films treated with In, Sn or In-Sn have shown improved abrasion resistance and reduced coefficient of friction compared to a ‘standard’ film making them especially suited to applications requiring low friction properties and good sliding wear resistance. 相似文献
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XU Jian-lin WANG Zhi-ping CHEN Chao .State Key Lab of Gansu New Non-ferrous Metal Materials Lanzhou University of Science Technology Lanzhou China .College of Mechanic-Electronic Engineering Lanzhou University of Science Technology Lanzhou China 《材料热处理学报》2004,25(5)
ALUMINUM BRONZE is an important engineeringmetal.It has been widely used to manufacture parts thatrequire high wear resistance and high stress based onsome important properties,such as high strength,certain ductility,excellent wear resistance andcorrosion resistance,etc.Typical applications includemarine propeller,valves,mould,gear blanks and so on.In recent years,tribological behaviors of aluminumbronze have been intensively investigated.For example,some researches were focused on the e… 相似文献
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In order to obtain a homogeneous distribution of fine Si particles in aluminium matrix and thus to improve the adaptability of Al-Si alloy for aerospace and automobile applications, Si particulate reinforced aluminium matrix composites have been processed by using powder metallurgy method. The Si pariticulates with 20–40 μm size and Al alloy powders were mixed, degassed and extruded at 350°C or 400°C depending on the composition of the matrix alloy. The microstructural characteristics of the composites such as interfacial stability at high temperatures have been investigated by various experimental techniques. Wear properties of the composites were investigated by using a pin-on-disk type wear tester. The results were compared with these obtained from the conventionally cast hypereutectic Al-Si alloys and discussed in terms of the observed microstructural characteristics and physical properties such as hardness and tensile properties. 相似文献
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古代青铜文物保护研究现状及AMT的应用 总被引:8,自引:0,他引:8
介绍了古代青铜文物腐蚀的主要产物、青铜病的起因 及危害,概述了国内外青铜文物保护现状,在作者前期研究结果基础上,总结了2-氨基-5- 巯基-1,3,4-噻二唑(AMT)作为青铜文物缓蚀保护剂的缓蚀性能和保护机制,指出了AMT用于青 铜文物保护的优势和未来的研究方向. 相似文献