铜/钢双金属复合制备工艺技术研究现状

介绍了目前国内外生产铜/钢双金属复合材料的主要制备工艺以及它们的原理和特点,在此基础上分析了铜/钢复合界面的冶金结合行为和铜/钢双金属复合材料制备的研究动态,并对铜/钢复合材料在各方面的应用做了简单介绍,最后对各制备工艺的未来发展趋势进行总结。     

碳纤维电沉积铜解决碳纤维／铝复合材料界面问题

碳纤维／铝复合材料界面相容性差，界面反应生成Ａｌ＿４Ｃ＿３。为此采用连续三步电沉积法对碳纤维电沉积铜获得碳／铜复合丝，使界面结合强度得到改善。本文对碳纤维／铝复合材料界面问题及连续三步电沉积工艺，作了初步分析讨论。     

铜钢复合材料和放热焊接技术在石油化工企业接地系统中的应用

接地网腐蚀是导致石油化工企业发生事故的主要因素之一,直接关系石油化工装置的运行安全及运行人员的安全。论述了铜钢复合材料的生产工艺、性能及连接方式,阐述了铜钢复合材料和放热焊接技术在石化企业接地网的应用。同时,对铜钢复合材料的应用状况和存在的问题进行了分析讨论。     

钛／钢复合板超声检测与结合质量的研究

钛／钢复合板在超声波检测过程中,根据钛与铜两种材料的声阻抗相差大,采用超声波探伤对界面波的高低与结合强度大小进行研究,从而找出钛／钢复合板超声探伤一次底波后面界面波与结合质量的对应关系,同时,为判断钛／钢复合材料后期加工中所承担风险提供相应超声探伤方面的依据。     

钛与钢及钛复合钢板的焊接性研究(Ⅱ)

介绍了国外钛与钢焊接基本概况,论述了用铌与铜做中间填料进行钛 铌 铜 钢间接焊接方法、接头的组织与性能。     

碳纤维增强铜基（碳／铜）复合材料的研究现状与展望

概述了国内，外碳／铜复合材料制造工艺，碳纤维与铜合金粉末的混合；碳／铜复合材料的成型工艺等。     

镀钛金刚石／铜复合材料的热导率

采用粉末冶金法在高温热压炉中制备金刚石／铜复合材料,研究了钛镀层、烧结温度、金刚石颗粒体积分数对金刚石／铜复合材料热导率的影响。结果表明：钛镀层能改善金刚石／铜复合材料的界面浸润性,降低孔隙率,提高热导率。烧结温度低于980℃时,烧结驱动力不足,致使金刚石／铜复合材料的致密度下降,热导率降低;烧结温度高于980℃时,由...     

熔渗法制备的钨铜复合材料及其显微组织

采用粉末预处理、添加诱导铜粉和还原气氛下熔渗的方法制备了用于电子封装／热沉的钨铜金属基复合材料。对比了不同工艺条件下采用熔渗法制备的钨铜复合材料的显微组织，并讨论了钨粉粒径、添加诱导刺等不同工艺条件对钨铜复合材料组织的影响。实验结果表明，当钨粉粒径为5～9μm，诱导铜粉粒径-500目时，经预烧结与熔渗过程得到的钨铜复合材料具有较高的组织均匀性和相对密度及良好的物理性能。     

碳毡／铜复合材料的制备及其物理性能研究

选用廉价的碳毡作为增强体，成功地摸索出用电沉积法制取碳毡／铜复合材料的工艺。研究了碳毡／铜复合材料的导电性能、热膨胀性能及电磁屏蔽性能。实验结果表明，该材料是一种较廉价且性能优越的新型功能复合材料。     

钛与钢及钛复合钢板的焊接性研究(Ⅲ)

介绍了钛 铌 铜 钢间接焊接接头模拟结构试验方法,对用钒做中间填料的钛 钒 钢间接式焊接进行了研究。     

电厂烟囱用钛-钢复合板钛复材焊接缺陷产生原因及预防措施

对于钛-钢复合板而言,钛自身的焊接性有若干显著的特点,而且钛和钢熔焊的焊缝会产生脆裂,进一步增加了钛-钢复合板中钛复材焊接的复杂性。本文分析了电厂烟囱用钛-钢复合板钛复材焊接缺陷的产生原因,并提出了相应的预防措施。     

爆炸-轧制钛/钢复合板界面结合性能研究

爆炸-轧制法是先通过爆炸复合制坯,再进行轧制生产复合板的一种方法。本文研究了爆炸-轧制法生产的钛/钢复合板的界面金相、结合界面的元素分布情况以及退火温度对界面结合强度的影响等问题,结果表明:爆炸轧制法生产的钛钢复合板的界面近似呈平直状,在界面钢侧有一脱碳层,引起界面附近碳元素的重新分布,对结合性能有重要影响;获得高强度结合的界面特征是:剥离界面钢层上的Ti元素含量在一定范围内,钛层大量粘铁;退火温度对界面的结合强度影响较大,而在相应保温下保温时间影响不明显。     

论钛钢复合板覆层钛板特性及对爆炸复合板的影响

本文论述了爆炸钛钢复合板的覆层用钛板的特性和工艺要求,分析了爆炸强化对覆层钛板的影响,并结合爆炸钛钢复合板的生产实践论述了用于爆炸复合的钛板的特点及对生产、检验、使用的影响,指出爆炸复合板用钛板其更低的杂质含量及良好的塑性更适合于生产爆炸复合板,而且耐腐蚀性更优良,其强度也会在爆炸过程得到提高。     

BFe30-1-1/10CrNi3 Mo V复合钢板热成形及热处理后焊接工艺研究

研究了BFe30 1 1 10CrNi3MoV复合钢板的焊接工艺和热成形工艺 ,结果表明 ,焊接后的复层铜与基层钢熔合良好 ,有效地阻止了钢侧中Fe离子对复层铜焊缝的污染。热循环引起的界面松弛对界面的剪切强度有一定的影响。     

层状金属复合材料生产工艺及其新进展

综述了金属层状复合技术的发展，介绍了国内外生产层状金属复合材料的工艺方法及其优缺点，在此其础上介绍了几种高效、低耗、短流程的制备层状金属复合材料的新技术，阐述了自蔓延高温合成（SHS）焊接技术的原理、工艺，并对其研究和应用的前景进行了分析。     

Weld overlay cladding of high strength low alloy steel with austenitic stainless steel – Structure and properties

The present work aims at studying structure–property correlations in a weld overlay clad high strength low alloy steel with austenitic stainless steel of American Institute for Steel and Iron (AISI) 347 grade. Optical microscopy studies revealed that the interface between the two steels was nearly flat. The base plate had ferrite plus bainite microstructure adjacent to the interface and tempered bainite/martensite structure away from the interface. Grain coarsening and decarburization were observed near the interface. The stainless steel exhibited austenite dendritic structure. Tensile strength, notch-tensile strength and charpy impact energy of the base plate were found to be higher than those for the interface. The microhardness was observed to be maximum on the clad layer near interface. The shear bond strength of the weld overlay-interface was higher than the shear strength of the base plate. Fractography was carried out using scanning electron microscope on tensile, notch-tensile and shear bond test specimens of the interface as well as shear test specimens of the base plate. It revealed the presence of predominantly dimpled rupture. Charpy impact specimens of the interface failed in mixed mode while impact specimens of the base plate failed in ductile mode. Electron probe microanalysis across the bond interface indicated linear change in concentrations of Cr, Ni, Mn, Cu, Mo, Nb and Si between the levels appropriate to the clad layer and base metal.     

金属复合板的工艺研究现状与发展

简要介绍了金属复合板的工艺研究现状及发展趋势,分析了现有工艺方法中存在的不足,指出随着研究的深入以及制备技术的不断发展,轧制复合法将成为金属复合板生产方法的主流方向。     

钛-不锈钢复合棒等强结合的特性

钛-不锈钢复合棒是航空航天领域中一种金属新材料,其性能的可靠性是保证各类航天器安全运行的重要条件,在工艺优化条件下生产的钛-不锈钢复合棒,具有与母材钛强度相等的结合强度,进一步证实了"爆炸焊接金属的极限强度等于或大于母材金属中较弱者的强度"这一说法.文章从金相、拉剪强度及钛材性能改变方面分析复合棒的显著特点,说明等强结...     

Deep surface transformation and cladding of net shape commercial steel parts by simultaneous multiple pulsed laser radiation

 A key innovation in materials processing of pre-formed metal parts is reported herein. The ”QQC Process” involves the judicious selection of exposure parameters to three pulsed lasers (excimer, Nd-YAG and CO₂) simultaneously for treatment of the work piece. Pre-formed commercial steel parts are hardened and/or toughened, and/or clad with TiC improving performance by at least one order of magnitude. Two examples are detailed: a punch for aluminum can production and a fuel injector nozzle. In the latter case it has been shown that some tens of microns of the metal are transformed to a noncrystalline phase, in the middle of the workpiece. Received: 10 December 1998 / Reviewed and accepted: 18 December 1998     

High‐performance Cu/Al laminated composites fabricated by horizontal twin‐roll casting

Horizontal twin‐roll casting technology was successfully introduced to produce high‐performance copper/aluminum (Cu/Al) laminated composites. The interface morphology, electrical properties and peeling strength after different annealing and cold rolling processes were investigated and contrasted with Cu/Al clad plates fabricated by conventional methods. The results show that sound metallurgical bonding between the copper and aluminum matrix can be attained after the horizontal twin‐roll casting processes and Al₂Cu is the only intermetallics at the interfacial region, the thickness of interfacial interlayer is about 0.7 μm. The peeling strength is 31.4 N/mm and can be further increased to 37.1 N/mm after annealing at 250 °C. However, higher temperature like 400 °C will cause the excessive growth of intermetallics so that peeling strength sharply decreases to 9.2 N/mm. Electrical conductivity of the clad plate is 51 MS/m. At the same electrical current intensity, the temperature‐rise of the composite plate is between the pure copper plate and the aluminum plate, and closer to the copper plate. All of the properties are outstanding than that of Cu/Al clad plate fabricated by conventional methods.