共查询到20条相似文献,搜索用时 62 毫秒
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在我国传统的制罐工艺中,罐体在缝焊后的焊缝处还要进行补涂,补涂一般为液态材料工艺较为复杂,而且质量也不易保证。近年来日益普及的粉末涂料喷涂工艺正越来越多地应用于三片饮料罐、食品罐、气雾罐的生产,对于制罐工业来说,粉末喷涂工艺虽不是什么新的技术,但人们真正开始重视它也才是近几年的事。早在20年前的美国,三片饮料罐、食品罐的焊缝内侧就已经采用粉末喷涂工艺进行生产。由于粉末喷涂的涂层比液体涂料涂装的涂层更厚,所以采用粉末涂装工艺可更 相似文献
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粉末涂装工艺分热涂和冷涂两大类,手动高压静电粉末喷涂工艺只是冷涂装工艺中的一种。该工艺采用100%的固体粉末涂料涂装工件表面,涂层坚固耐用,过喷粉末95%以上可回收利用。手动高压静电粉末喷涂工艺为我厂重点技改项目之一,本文仅就选用相关设备的经验与同行... 相似文献
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针对得载条件下工作的磨损零件进行喷涂修复后存在的问题,提出了用自熔合金粉末混加放热型粉末用于喷涂作业的新工艺,并经试验验证和实际应用,取得了较好的效果。 相似文献
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等离子喷涂工艺参数对粉末熔化的影响 总被引:7,自引:0,他引:7
改变真空等离子喷涂工艺条件可调节等离子功率,以及等离子炬的温度、速度和离子化率,从而决定粉末在等离子炬中的行为。本工作研究了喷涂工艺参数如电流、Ar流量、H2流量、气压和喷涂距离与等离子功率的定量关系,用喷扫实验测定了这工艺参数的变化驿钛粉末熔化程度的影响。等离子功率与电流、Ar和H2流量分别成正比、线性及平方根关系,与气压无关。电流和H2流量的影响最大,增加电流和H2流量大大促进粉末熔化。气和喷 相似文献
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E. Schüller L. Krone M. Bram H. P. Buchkremer D. Stver 《Materialwissenschaft und Werkstofftechnik》2004,35(5):326-331
As a promising method to produce thin porous NiTi sheets, Wet Powder Spraying (WPS) is applied for NiTi powders. Layers with a thickness of 150 μm are obtained from pre‐alloyed NiTi powders with a particle size of < 12 μm. Optimized process control for spraying and sintering was used. Microstructure and phase formation is characterized. The sheets with a porosity of 15 % show a high pseudoelastic flexibility at room temperature. Phase transformation temperatures are determined by Differential scanning calorimetry (DSC). The one way effect could be demonstrated. 相似文献
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Xiancheng ZHANG Jianming GONG ShandongDepartment of Mechanical Engineering Nanjing University of Technology Nanjing ChinaDepartment of Mechanical Engineering East China University of Science Technology Shanghai China 《材料科学技术学报》2004,20(2):149-153
The thermomechanical behavior and the distribution of residual stresses due to thermal spraying of NiCoCrAlY coating were studied by thermomechanical finite element analysis. The effects of phase transformation due to solidifying process of coating particles, thickness and material properties of coating on the residual stresses were discussed. Results showed that residual stress decreases little with the stress relaxation due to the phase transformation. For the substrates with the same thickness, the residual stress increases with the increase in coating thickness. The state of residual stresses relates to the material properties of coating and substrate closely. The stress-induced failure model of coating is also discussed. 相似文献
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包装机械零,部件在制造过程,内部都会产生残余应力,通过实验阐述了残余应力对包装机械腐蚀开裂性能的影响,以及防止腐蚀开裂的措施。 相似文献
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