共查询到19条相似文献,搜索用时 812 毫秒
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0151水溶性半无机硅钢片漆的研制与应用 总被引:1,自引:1,他引:0
开发合成了不含铬盐和酚醛树脂的水溶性树脂,采用不同粒径的无机粒子,使其在体系中达到50%的比例充当涂层的主体。通过有机物、无机物、助剂三者的优化组合及工艺设计,实现有机组分和无机组分之间的很好结合,功能互补。开发的涂层既能保持无机涂层的耐热性能,耐FranKlin烧损试验,又具有较好的柔韧性和铺展性,且能增强涂层的冲剪性能。应用实验结果表明,0151水溶性半无机硅钢片漆用于冲片的涂层片间绝缘电阻达到9 999 MΩ,FranKlin烧损试验最大泄露电流值为0.053 9 A,其他各项性能均与国外某公司进口漆性能水平相当,完全能满足大中型发电设备的技术要求和生产需要。 相似文献
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为了结合陶瓷的性能优势和搪瓷的工艺优势,利用先进的等离子喷涂工艺制备了臭氧发生器介质涂层。对涂层进行了微观结构分析和介电性能测试,并设计制作了管式臭氧发生器样机,研究了不同涂层对臭氧产生性能的影响。研究结果显示等离子喷涂涂层满足臭氧发生器的设计要求,且可以获得更高的相对介电常数εr,其中氧化铝(Al2O3)加氧化钛(TiO2)的双涂层方案具有最佳的臭氧生成性能。等离子喷涂工艺具有很强的灵活性,可替代玻璃和搪瓷成为臭氧发生器新的介质层负载工艺,具有良好的应用前景。 相似文献
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我厂转子铸铝由压铸取代离心转铝工艺后,从对比试验数据看到,电机效率降低了,温升提高了,和滑差也增加了。如表一、二。如何设法降低压铸工艺转子的附加损耗呢?我厂经过多次经验,以磷酸二氢铝为基的无机绝缘材料配成涂料,浸涂在转子槽壁上,涂层约15~25微米。在JO_251-2、JO_252-2 相似文献
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发电厂引风机普遍存在风机叶片磨蚀问题,此类问题会造成较大经济损失。而精细结构陶瓷具有一般金属难以比拟的耐磨性能,因而,耐磨陶瓷覆层风机叶片是目前开发的一项新型防磨技术,该文提出了一种自蔓延高温合成风机叶片耐磨陶瓷覆层新技术。图2参3 相似文献
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燃煤锅炉轴流式引风机叶片耐磨涂层的应用研究 总被引:2,自引:0,他引:2
针对燃煤锅炉轴流式引风机叶片的磨损机理,设计并制备了Ni60及NiWC35喷熔层、3Cr13火焰喷涂层、LX88A电弧喷涂层、微米结构及纳米结构WC-12Co超音速火焰(HVOF)喷涂层。研究分析了不同喷涂层的组织结构、硬度及抗冲蚀磨损性能,探讨了HVOF喷涂的纳米结构WC-12Co涂层的抗冲蚀磨损机理。研究表明:HVOF喷涂的纳米结构WC-12Co涂层与普通微米结构的WC-12Co涂层相比组织结构更致密,显微硬度提高50%左右,在所有的试验涂层中具有最优良的抗冲蚀磨损性能,其耐磨性比微米WC-12Co涂层提高1倍左右,可望在轴流式引风机上得到广泛的应用。 相似文献
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G. V. Kachalin A. F. Mednikov A. B. Tkhabisimov D. A. Arkad’ev S. G. Temkin N. A. Senina 《Thermal Engineering》2016,63(12):848-851
Fatigue test results of the rotating steel blades of the fourth stage of the K-25-0.6 low pressure cylinder Geo steam turbine manufactured in the Kaluga Turbine Plant (hereinafter, KTP) with the ion-plasma coating were presented. Coating formation was carried out at the National Research University (MPEI) on the Gefest vacuum pilot plant by the magnetron sputtering method. Characteristics of the obtained coating were analyzed with the use of the scientific-research equipment of the National Research University (MPEI). Fatigue tests of the rotating blades and determination of the fatigue strength of the material with the ion-plasma coating were carried out on the electrodynamic vibration machines VEDS-400A in the KTP structural laboratory. The following characteristics were obtained after tests: Ti-TiN composition, 10–11 μm thickness, 1200 HV 0.05 microhardness. Fatigue tests showed that destruction, regardless of availability or nonavailability of the coating, took place by cross-section in the root zone both on the leading and trailing edges of the blade, i.e., in the most stressed zones. It was found out that the maximum stresses during tests were revealed in the root section along the trailing edge on the blade pressure side, and the less stresses were on the leading edge. Fatigue strength of the working blades after coating formation increased by 12% minimum. Results of the fatigue tests prove the previously obtained data concerning 10–12% increase of the fatigue strength of the blade steel with the ion-plasma coating and allow claiming that the process of their formation exerts the positive influence on the fatigue characteristics of the blade materials. 相似文献
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N. V. Mozhaiskaya A. V. Moshnikov V. V. Rtishchev A. I. Rybnikov G. D. Pigrova 《Thermal Engineering》2011,58(2):126-134
We present the results obtained from a comprehensive study of the plasma metalloceramic coating applied on the external surfaces
and diffusion coating applied on the internal surfaces of rotor blades and guide vanes used in stages 1–3 of a GTE-65 gas
turbine unit. 相似文献
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防覆冰涂料的研究与进展 总被引:2,自引:0,他引:2
覆冰灾害常常会造成巨大的损失,对比现有不同的防覆冰措施,认为采用防覆冰涂料是一个切实有效的方法。系统总结了目前对防覆冰涂料的测试方法、影响冰在基材表面附着力的基本因素和国外防覆冰涂料的一些研究进展,提出在我国开展防覆冰涂料的研究开发的必要性。 相似文献