共查询到19条相似文献,搜索用时 171 毫秒
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E.Lugscheider K.Bobzin L.Zhao F.Ernst J.Zwick 《机械工人(热加工)》2007,(5):20-23
冷喷涂工艺具有喷涂材料低氧化性与喷涂过程中基体和粒子表面氧化膜破裂的特性,因此广泛应用于铜焊技术。目前研究中,两种铜焊合金AlSi12和AlSi10Cu4可通过冷喷涂工艺喷涂在6063和3003铝合金上。喷涂参数对粒子速度的影响可通过DPV2000研究。喷涂材料和参数对涂层形成和涂层微观结构的影响已做研究。 相似文献
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冷喷涂Cu-Zn-Al_2O_3修复斯太尔发动机水道腐蚀区域的涂层性能分析 总被引:2,自引:0,他引:2
采用冷气体动力喷涂技术,喷涂超细Cu-Zn-Al2O3复合粉来修复斯太尔发动机水道腐蚀区域,并对冷喷涂层的显微结构、物相组成和力学性能进行了表征。实验表明,超细Cu-Zn-Al2O3复合粉经超音速冷喷涂制备的涂层可与发动机缸体基体结合牢固,显微组织致密,测得的涂层抗拉强度值达到28.87 MPa,涂层表面硬度均值143.6HV0.05,耐磨性是斯太尔发动机基体的5.035 5倍,延长了设备服役期。 相似文献
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本文研究了利用等离子弧喷涂技术将人造骨粉喷涂于金属人工关节表面时,喷涂工艺参数对涂层质量的影响,测定并分析了不同工艺参数下涂层的结合强度和显微组织。试验结果表明,选择合适的喷涂工艺参数和控制措施,可以获得结合性能较佳的以金属人工关节为基体的人造骨粉涂层。 相似文献
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Kirsten BOBZIN Lidong ZHAO Thomas SCHLAEFER Thomas WARDA 《Frontiers of Mechanical Engineering》2010,5(3):256
In the present study, samples of aluminium alloy 6060 were coated by cold spraying with a powder of brazing alloy Al12Si. The influence of the process gas temperature on particle velocities and coating build-up was investigated. The coated samples were heat-treated in air and under argon atmosphere to investigate the wetting behaviour of the deposited Al12Si and the diffusion processes between Al12Si coatings and substrates. Coated samples were brazed flux-free under argon atmosphere by an induction heating system. The microstructure of the coated, heat-treated, and brazed samples was investigated. The shear strength of the brazed joints was determined. The results show that the brazing alloy Al12Si could be very well deposited on the substrate by cold spraying. The particle velocity increased with increasing process temperature. Correspondingly, the thickness of Al12Si coatings increased with increasing process temperature. The heat treatments showed that a very good metallurgical bond between the Al12Si coatings and the substrate could be realized by the deposition using cold spraying. The coated samples could be well brazed without fluxes. The coating thickness and overlap width influenced the shear strength of the brazed joints. The highest shear strength of brazed joints amounts to 80 MPa. 相似文献
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Kirsten Bobzin Lidong Zhao Thomas Schlaefer Thomas Warda 《Frontiers of Mechanical Engineering in China》2010,5(3):256-260
In the present study, samples of aluminium alloy 6060 were coated by cold spraying with a powder of brazing alloy Al12Si.
The influence of the process gas temperature on particle velocities and coating build-up was investigated. The coated samples
were heat-treated in air and under argon atmosphere to investigate the wetting behaviour of the deposited Al12Si and the diffusion
processes between Al12Si coatings and substrates. Coated samples were brazed flux-free under argon atmosphere by an induction
heating system. The microstructure of the coated, heat-treated, and brazed samples was investigated. The shear strength of
the brazed joints was determined. The results show that the brazing alloy Al12Si could be very well deposited on the substrate
by cold spraying. The particle velocity increased with increasing process temperature. Correspondingly, the thickness of Al12Si
coatings increased with increasing process temperature. The heat treatments showed that a very good metallurgical bond between
the Al12Si coatings and the substrate could be realized by the deposition using cold spraying. The coated samples could be
well brazed without fluxes. The coating thickness and overlap width influenced the shear strength of the brazed joints. The
highest shear strength of brazed joints amounts to 80 MPa. 相似文献
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冷喷涂层为搅拌摩擦焊(Friction stir welding, FSW)接头提供了良好的防腐效果,但冷喷涂层对FSW接头力学性能的影响尚不明确。基于此,本研究通过拉伸和疲劳试验研究冷喷涂层对2024-T3铝合金接头力学性能的影响,并采用透射电子显微镜(Transmission electron microscope, TEM)与差示扫描量热法(Differential scanning calorimetry, DSC)表征冷喷涂前后接头显微组织的变化。试验结果表明,在2024-T3铝合金FSW接头上制备冷喷涂层后,接头的力学性能得到了一定改善,其抗拉强度从393.3 MPa提高到420.0 MPa,伸长率从4.3%增加到6.9%。当疲劳循环次数为1×107时,喷涂后的FSW接头在50%存活率下的疲劳强度比焊态高29.1%,在95%存活率下的比焊态高30.9%。TEM和DSC结果表明,喷涂后焊核区S相的数量、Cu与Mg原子偏聚区体积分数明显增多,这可能是接头力学性能提升的内在原因。 相似文献
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用氧乙炔焰加熔剂助熔一步法在12CrlMoV珠光体耐热钢和25号钢高温高压阀门密封面基体.上喷熔铁547B合金粉末.对喷熔工艺及喷熔层的硬度、时效硬化特性、热耐久性能、抗擦伤性能等使用性能进行较系统的试验研究。证明用喷熔铁547B合金粉末工艺修复电站高温高压阀门密封面裂纹是可行的。 相似文献
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高速冷喷涂技术及发展 总被引:5,自引:0,他引:5
高速冷喷涂是一项发展迅速的工业表面喷涂新技术,具有其它表面喷涂不可替代的优点,拥有潜在的广泛应用市场。文中根据国外最新研究资料对高速冷喷涂加工原理、应用、加工设备和系统构成进行了较为详实的介绍和论述。 相似文献
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