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文章对铜带荷叶边形成的原理进行了分析,指出剪切工艺参数影响铜带的边部质量;刀轴精度、刀具及橡胶环精度影响剪切时的水平间隙和重叠量。生产中应及时调整铜带在圆盘剪出入口的位置和铜带方向,避免荷叶边的产生。 相似文献
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油气输送用耐腐蚀双金属复合管 总被引:2,自引:0,他引:2
双金属复合管外层为碳钢,如B(L245)、X42(L290)、X52(L360)、X60(L415)、X70(L485)等钢级,钢管内层为18-8型奥氏体不锈钢或铁素体-奥氏体双相不锈钢。介绍了内外层复合工艺、外覆防腐技术、管体间焊接工艺和双金属复合管的性能和使用。 相似文献
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对铜带拉弯矫直机组的主要设备进行了分析,介绍了我院研制开发的第一台国产高精度铜带拉弯矫直机组的主要特点、工艺参数及实际生产效果。 相似文献
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为了获得高质量的层状金属复合材料,依据双辊薄带复合铸轧技术,探究工艺参数间的耦合作用对复合铸轧的影响。采用有限元软件构建了铜和铝的固-液复合铸轧仿真模型,基于该模型,研究了铝板出口厚度、轧制速度、熔池高度、铜带厚度和浇注温度对Kiss点高度的影响,并对正交试验得到的Kiss点高度进行极差分析,得到了铝板出口厚度、轧制速度和铜带厚度3个强耦合参数,给出了这3个参数两两耦合下耦合强度的变化规律。铝板出口厚度和铜带厚度、铜带厚度和轧制速度对Kiss点高度的耦合影响随参数值的增大其效果逐渐减弱,铝板出口厚度和轧制速度对Kiss点高度的耦合影响随参数值的增大其效果逐渐增强。同时,利用复合铸轧熔池物理场的变化,分析了产生耦合的原因。 相似文献
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This paper presents the experimental results of the first phase of a study undertaken at the American University of Beirut to examine the effectiveness of fiber reinforced polymer (FRP) wraps to confine steel reinforcement in a tension lap splice region anchored in high-strength reinforced-concrete beams. Seven beam specimens were constructed. The specimens were reinforced on the tension side with three deformed bars spliced at midspan. The splice region was devoid of any transverse reinforcement to allow a full examination of the FRP wrap contribution. Glass fiber reinforced polymer (GFRP) sheets were used. The main test variables were the GFRP configuration in the splice region (one strip, two strips, or a continuous strip), and the number of layers of the GFRP wraps placed around the splice region (one layer or two layers). All GFRP wraps were U-shaped. Except for the epoxy adhesive, no other anchorage mechanism or bonding procedure was applied for the GFRP wraps on the concrete beam. Following the application of the GFRP wraps, the beams were tested in positive bending. The test results demonstrated that GFRP wraps were effective in enhancing the bond strength and ductility of failure mode of the tension lap splices, especially when continuous strips were applied over the splice region. 相似文献
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以我国接插元件弹性铜合金带材为阐述对象,阐明接插元件弹性铜合金带材种类、工艺特点、应用领域和性能要求,介绍国内外接插元件弹性铜合金的研究成果和新动态,指出我国弹性铜合金带材生产中存在的问题,提出我国弹性铜带材料开发、工艺改善的发展方向. 相似文献
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采用非平衡态的高能铜离子注入技术,对钼芯材表面进行改性并一次覆铜形成过渡铜层,将原本不固溶的的钼/铜界面转化为铜/铜界面,制得高界面结合强度的铜/钼/铜叠层复合材料;采用近终形的热等静压复合技术进行二次覆铜,结合小变形量冷轧工艺进行复合板材精整,降低各层协同变形量,保证了叠层复合材料的板形、芯层质量、表面粗糙度及平行度。本方法所制备的铜/钼/铜叠层复合材料具有界面结合强度高、板形良好、芯层质量好且平行度好的优点,可作为一种电子封装材料或热沉材料应用于电子、信息技术领域。 相似文献
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研究探讨了改善半导体框架材料表面特性的方法,这种通过在高强度铜合金表面电解沉积一层纯铜层,然后再经过轧制和热处理的生产工艺,可获得与无氧铜相同的优良表面特性而又不降低母材强度的复合材料。 相似文献
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During heat treatment of cladded steel composites, element redistribution may occur between the various plating materials. Depending on alloy composition and the particular time–temperature profile, Carbon (C) diffusion between the plating materials is observed. Herein, C diffusion between different layers of roll-cladded steel composites during typical production routes is numerically simulated with the thermokinetic software package MatCalc. Two material combinations, 340LA–22MnB5 and 340LA–34MnB5, are compared with experimental results of large-scale manufactured steel composite material at different production steps, from hot strip to hardened cold strip material. The simulation agrees qualitatively and quantitatively well with the experimental results. It is demonstrated that even short heat treatment intervals can have significant influence on the C redistribution within the steel composite. 相似文献