共查询到18条相似文献,搜索用时 171 毫秒
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窄脉冲保形全方位离子注入技术 总被引:2,自引:0,他引:2
叙述了全方位离子注入过程中,由于被处理零件与其周围离子鞘层之间厚度的增加,引起零件与鞘层之间保形性变差,导致零件表面注入剂量不均匀性;文中系统分析了注入电压、等离子体密度、脉冲宽度和脉冲频率等处理工艺参数对注入剂量不均匀性的影响,用鞘层动力学计算机数值模拟方法从理论上研究了轴承内外圈处理中工艺参数对注入剂量不均匀性的影响,并用实验方法进行了测量验证,理论研究和试验测量结果的一致性,说明所提出的窄脉冲保形全方位离子注入技术完全适用于复杂形状零件表面均匀强化处理。 相似文献
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论述了CADD5软件包中CVNCM2/M3技术及FIDIA数控技术结合万能铣头在洗衣机联体桶模具生产中的应用。减少了工件在加工过程中定位次数,提高了加工精度,降低了对刀具长度的苛刻要求,从而缩短了加工时间,保证了加工周期。 相似文献
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内螺纹冷挤压成形加工技术在加工车间早已得到应用。但是,近年来,随着丝锥几何形状的优化设计和涂层技术的不断进步,这种无屑加工技术已能适用于越来越广泛的工件材料。例如,埃莫克公司(Emuge Corp.)开发的Innoform冷挤压成形丝锥系列产品有30种几何形状与涂层的组合,可应用于7大类工件材料的加工, 相似文献
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工作辊擦辊器的上、下擦辊梁在加工中存在工件易变形、堆焊合金层厚度均匀性要求高、槽加工难度大等问题。对工件的工艺流程和机械加工工艺进行了合理的安排,优化生产工序,使加工工艺满足了设计要求,保证了产品质量和生产进度。 相似文献
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镁合金以其优越的性能在工业上的应用越来越广泛,但是其耐蚀性、耐磨性较差,硬度较低的缺点限制了它的大量使用.利用改进的金属蒸发弧放电离子源(MEVVA)在AZ31镁合金表面注入Ti离子,形成Ti离子注入改性层,以期提高镁合金表面的耐蚀性能.注入能量为45keV,注入剂量为3×1017 cm-2.注入后镁合金表面形成厚度约为450nm的注入层,用SEM、XRD分析了Ti离子注入层的表面形貌和相结构.用CS300P型电化学工作站测试了注入前后镁合金的耐蚀性,结果表明镁合金表面耐蚀性能显著提高. 相似文献
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等离子体浸没离子注入(PⅢ)在材料表面改性中的应用及发展 总被引:1,自引:0,他引:1
等离子体浸没离子注入(PⅢ)是一种用于材料表面改性的新的离子注入技术.系统地分析和讨论了等离子体浸没离子注入技术的原理和特点:该技术直接将待处理材料浸没在等离子体中进行注入,保留了常规束线离子注入(CBⅡ)技术的主要特点,消除了常规束线离子注入所固有的视线限制,克服了保持剂量问题,使注入装置变得简单和价廉.综述了等离子体浸没离子注入技术在金属材料、半导体材料和高分子材料改性方面的应用.展示了等离子体浸没离子注入技术应用的发展前景. 相似文献
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A new approach to the development of advanced coating deposition and ion implantation method including an application of filtered dc metal plasma and high-frequency short-pulsed negative bias voltage with a duty factor in the range of 10-99% are considered. The ion energy spectrum for different negative bias potential pulse durations (120-1100 ns) was measured. The chart of various methods of ion beam and plasma material treatment using high-frequency short pulse metal plasma immersion ion implantation or deposition depending on bias pulse duty factor and amplitude for Cu plasma is presented. The ion assisted coating deposition has been examined depending on samples conductivity and thickness, plasma concentration, pulse repetition rate, amplitude, and duty factor. 相似文献
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YANG Jian-hua'''' GONG Yun-guo'''' CHENG Ming-fei> ZHANG Tong-he .Department of Physics Nantong University Jiangsu China .Department of Physics Nantong Institute of Technology Jiangsu China . Radiation Beam Materials Engineering Lab Beijing Normal University Beijing China 《材料热处理学报》2004,25(5)
IN severe working and operating conditions tin filmsfabricated by conventional methods may also fail.Therefore,the investigations were towards furthersurface treatments,aiming at modifying the wearresistance of TiN films.Among the post surfacetreatment methods,MEVVA ion implantation hasshown to be particularly promising for surfacemodification|2l Some studies have shown that the wearand friction of implanted TiN films were improved afterMEVVA ion implantation,irrespective of the type ofi… 相似文献
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W. L. Lin X. J. Ding J. M. Sang J. Xu X. M. Yuan 《Journal of Materials Engineering and Performance》1994,3(5):587-590
Ion implantation, as an efficient surface processing technique, has developed to include the implantation of various metallic
ions for improving not only wear properties, but also such other surface properties as solid lubrication, fatigue, chemical
stability, and engineering reliability. The high-dose metal ion implantation that can be accumulated in a short time over
a relatively large implanting area makes metal vapor vacuum arc (MEVVA) source ion implantation well suited to practical surface
engineering modification applications. 相似文献