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不锈钢复合板生产可以采用坯料非对称真空复合、爆炸复合和对称焊接复合等工艺制坯。针对以上三种制坯方式以及相应不锈钢复合板坯料轧制工艺展开研究、对比分析,确定不同组坯方式对复合板轧制的影响,从而设计出合理的制坯工艺。 相似文献
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介绍了不锈钢─碳钢大厚复合板坯的爆炸焊接和热、冷轧工艺,及其在不同状态下的成分、组织和性能。探讨了爆炸焊接和爆炸复合材料轧制的机理。叙述了这种复合材料的用途。 相似文献
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不锈钢——碳钢大厚复合板坯的爆炸焊接和轧制 总被引:9,自引:1,他引:8
介绍了不锈钢-碳钢大厚复合板坯的爆炸焊接和热,冷轧工艺,及其在不同状态下的成分,组织和性能,探讨了爆炸焊接和爆炸复合材料轧制的机理,叙述了这种复合材料的用途。 相似文献
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加大铜带卷的焊接先进工艺 在连续挤压初始咬入中圆坯料与工具的接触的变形规律性 熔炼铝合金时温度差的分析 由铜中氢和氧的含量决定的盘条质量 撞拔光亮铜盘条的工艺性 (?)弹性合金的应力腐蚀开裂 熔炼黄铜炉渣的成分和结构 相似文献
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郑远谋 《有色金属材料与工程》2003,24(4):161-165
介绍了对称碰撞爆炸焊接的实验方法,总结了它的实际应用。指出,这种爆炸焊接的工艺和技术,不仅在研究爆炸复合材料内部的物理和化学现象中有重要的理论价值,而且在生产大厚复合板坯方面更有优势。 相似文献
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爆炸焊接在我国还是一种新的焊接方法,它可以将两种大面积的金属板焊接成双金属板。我厂大电流石墨化炉导电母线和铜铝母线接头,原先采用螺栓直接压接,经过几年运行接触面电腐蚀严重。我们采用爆炸焊接新工艺,爆炸成300×300×20mm铜板与300×300×3mm铝板的双金属过渡板。现在已用于石墨化炉,解决了铜铝直接压接电腐蚀严重的问题。铜铝过渡接头的接触电阻为铜铝直接压接电阻的四分之一;稳定性好,经一年的运行,接触 相似文献
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C. Genevois M. Girard B. Huneau X. Sauvage G. Racineux 《Metallurgical and Materials Transactions A》2011,42(8):2290-2295
Commercially pure copper was joined to a 1050 aluminum alloy by friction stir welding. A specific configuration where the
tool pin was fully located in the aluminum plate was chosen. In such a situation, there is no mechanical mixing between the
two materials, but frictional heating gives rise to a significant thermally activated interdiffusion at the copper/aluminum
interface. This gives rise to the formation of defect-free joints where the bonding is achieved by a very thin intermetallic
layer at the Cu/Al interface. Nanoscaled grains within this bonding layer were characterized using transmission electron microscopy
(TEM). Two phases were identified, namely, Al2Cu and Al4Cu9 phases. The nucleation and growth of these two phases are discussed and compared to the standard reactive interdiffusion
reactions between Cu and Al. 相似文献
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Yoshihiko Hangai Shinji Koyama Makoto Hasegawa Takao Utsunomiya 《Metallurgical and Materials Transactions A》2010,41(9):2184-2186
Aluminum foam/dense steel composites were fabricated by friction stir welding (FSW). It is expected that both mixing a blowing
agent into aluminum and bonding the aluminum precursor to steel can be conducted simultaneously by FSW. It was shown that
although heat treatment of the precursor evolved a brittle intermetallic compound layer, the bonding strength of the interface
consisting of the intermetallic compound layer was relatively high compared with the fracture strength of the aluminum foam
itself. 相似文献
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S. Muthukumaran S. Senthil Kumaran Saket Kumar 《Transactions of the Indian Institute of Metals》2011,64(3):255-260
In the present study, friction welding of tube to tube plate using an external tool (FWTPET) was used to weld copper tubes
with aluminum plates. Tubes were prepared with holes along the faying surfaces of tubes and cleaned before welding. The weld
microstructure shows line of stir zone (SZ), a narrow thermo mechanically affected zone and heat affected zone (HAZ). The
welded samples were found to have satisfactory joint strength and the XRD study showed the presence of AlCu intermetallic
in the weld zone. The hardness survey revealed that there was a slight increase in hardness adjacent to the weld interface
due to grain refinement. Better weld joints were achieved when the tool rotation speed and interference are 1500 rpm and 0.8
mm respectively. The present study confirms that a high quality copper tube to aluminium tube plate joint can be achieved
by FWPET process. 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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超细晶材料综合性能优异,但组织热稳定性较差,焊接后接头组织容易发生异常长大,使其性能急剧下降。因此,合适的连接工艺对大尺寸超细晶结构件的应用具有重要工程意义。以超细晶铜、粗晶铝以及粗晶铜、粗晶铝作为结构母材,采用热输入量小的搅拌摩擦焊(FSW)工艺进行连接探索,系统观察了铜铝接头组织与性能。结果表明,超细晶铜与铝接头界面处元素互扩散能力较强,形成较多的Al4Cu9 金属间化合物;在焊接过程中,当搅拌头转速为1000 r/min,焊接速度为50 mm/min时,粗晶铜与铝接头硬度可达HV 211,超细晶铜与铝焊接接头可获得良好的力学性能。 相似文献
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Ivan Galv?o Altino Loureiro David Verdera Daniel Gesto Dulce Maria Rodrigues 《Metallurgical and Materials Transactions A》2012,43(13):5096-5105
In this work, a systematic analysis of the effect of tool offsetting on the morphological, structural, and mechanical properties of 6082-T6 aluminum to copper-DHP friction-stir welds was performed, enabling full understanding of Al-Cu bonding structure and failure mechanisms. Important relations between tool positioning and the thermomechanical phenomena taking place during welding were established. Tool offsetting was revealed to be an effective way of solving one of the most important concerns in Al/Cu friction-stir welding, i.e., the formation of large amounts of intermetallic-rich structures, which deeply influence the final strength and surface morphology of the welds. Actually, for welds produced without tool offsetting, it was found that the formation of fluidized intermetallic-rich structures promote the formation of internal decohesion areas inside the nugget, which have a detrimental effect on weld strength. For welds carried out with tool offsetting, intermetallic formation is almost suppressed, but important metallurgical discontinuities in the vicinity of large copper fragments, dispersed over the nugget, and at the nugget/copper interface were also found to have a detrimental effect on weld strength. 相似文献
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为了开发同时具有超高强度和良好韧性的低合金超高强度钢板,采用30MnCrNiMo连铸坯和33MnCrNi3Mo钢锭,经过真空复合焊接,高温轧制,淬火+低温回火热处理工艺研制出15 mm CrNiMo-CrNi3MoCrNiMo三层复合超高强度钢板;利用探伤、拉伸、冷弯、冲击、硬度等试验检验其结合度和力学性能;利用光学显微镜、扫描电镜等分析三层复合超高强度钢的组织和冲击断口形貌。结果表明,采用该工艺生产的三层复合超高强度钢板结合性良好,能够满足GB/T 7734-2015Ⅰ级探伤要求;复合钢板的综合力学性能良好,结合面处硬度值存在明显的过渡区域;结合面组织和基体组织均为回火马氏体组织。 相似文献