共查询到20条相似文献,搜索用时 213 毫秒
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<正>上海2011年中国国际工业博览会期间,西门子在新闻发布会上宣布对自动化、驱动和工业业务领域进行调整。通过此次调整重申了"领先科技,提升客户可持续价值"的承诺。从2011年10月1日起,西门子工业业务领域开始实施新的组织架构,调整后的工业业务领域由工业自动化、驱动技术、客户服务3个业务集 相似文献
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工业射线照相技术的未来-数字化检测 总被引:2,自引:0,他引:2
介绍几种目前还应用在医用领域或刚刚开始应用到工业领域的数字化射线照相方法,展望了将来可能广泛应用到工业领域中的数字化射线照相检测新技术;并探讨了实现过程中的一些需要解决的问题。 相似文献
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《特种铸造及有色合金》2021,(8)
正科学技术的高效创新与经济社会的快速发展有效带动了工业的不断进步与优化,其为工业发展提供了有效的技术支持与经济保证,这使我国的工业发展正朝向全球领军行列进发。现阶段,全球的工业发展进程进入了一个新的历史纪元,智能技术、信息技术与数字化技术正不断被融入到新兴的工业领域中。这个新的工业发展阶段被当下工业研究学者称为第四次工业革命,即工业4.0。在工业4.0中,像人工智能、自动化机械等技术及技术成果得到了工业生产相关领域的高度重视,各国家研究学者正不断努力将上述新兴技术融入到实际工业生产之中。在工业发展的历史进程中,机械制造行业一直担当着为工业中各领域提供设备支持的重要基础性角色,而在机械制造业中,机械铸造环节尤为重要,优劣与否决定着产出产品的质量及性能。因此,大力推动机械铸 相似文献
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溶胶—凝胶碳热还原法制备碳化硅超细粉末的研究 总被引:1,自引:0,他引:1
以工业水玻璃和碳黑为主要原料,采用溶胶凝胶和碳热还原法制备了碳化硅超细粉末,研究了原料组成和制备工艺对超细粉末质量的影响。结果表明:该方法可直接制备纯度较高、颗粒直径分布范围小,粒径可在一定范围内控制的碳化硅超细粉末。 相似文献
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Ambat M. V. Frazer D. Popovic M. P. Balooch M. Stevenson S. Scott A. Kabel J. Hosemann P. 《JOM Journal of the Minerals, Metals and Materials Society》2020,72(1):170-175
JOM - Composites formed by SiC fiber reinforcement of a SiC matrix are materials of interest for use in high temperature, high strength, and high irradiation condition applications. These materials... 相似文献
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工业合成SiC的节能提质技术及CO收集 总被引:3,自引:1,他引:3
碳化硅生产是高耗能行业。本文在简述各种炉体改进和工艺改进的基础上,详细阐述了多热源工业合成碳化硅新技术的节能降耗提质理论及CO回收技术。工业实践表明,三热源合成炉较单热源炉产量提高48.1%,特、一级品率提高30%,节能10%以上,杜绝了单热源生产中频繁喷炉事故,炉体易实现大型化。多热源合成炉炉气中CO含量高达92%,利用新型高温涂塑布气体收集装置收集CO,可提纯利用,生产甲醇进而生产洁净燃料二甲醚。研究成果对于碳化硅工业生产的环境污染控制和提高经济效益具有重要意义。 相似文献
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在生产条件下采用冲入法制备了改性纳米SiC粉体强韧化ZGMn13耐磨材料,研究了SiC粉体对ZGMn13显微组织和力学性能的影响。结果表明:经表面活性处理的纳米SiC粉体能够明显改善高锰钢凝固组织。经水韧处理后,组织更加细小,碳化物基本固溶到基体中。在本实验研究范围内,随着SiC加入量增加,力学性能也不断提高,其强化机理主要是细晶强化和第二相粒子弥散强化的综合作用。当纳米SiC粉体加入量为0.1%时,抗拉强度、硬度和韧性最优,分别提高了8.2%、19%和22%。 相似文献
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Lirong Tong Ramana G. Reddy 《JOM Journal of the Minerals, Metals and Materials Society》2006,58(4):62-66
The thermal plasma synthesis of nanopowders is a relatively new technology with great potential for future industrial applications.
This article introduces research carried out in the plasma processing laboratory at the University of Alabama in Tuscaloosa,
Alabama. Ceramic nanopowders and nanofibers (SiC, TiC, and B4C) and nanocomposite powders (TiC−Al(Ti), TiC−Fe(Ti), and TiN−Fe (Ti)) were successfully synthesized by thermal plasma technology. 相似文献
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Jianjun Chen Qiang ShiLipeng Xin Yang LiuRenjuan Liu Xiaoyan Zhu 《Journal of Alloys and Compounds》2011,509(24):6844-6847
A large number of SiC nanowires were fabricated by a simple catalyst-free method using silicon powders and expandable graphite as raw materials. Digital camera, X-ray diffractometer, Fourier transform infrared spectrometer, field-emission scanning electron microscopy and transmission electron microscopy demonstrate that a large number of loose products were obtained in graphite crucible. The products are composed of single crystalline 3C-SiC nanowires with lengths up to several tens of micrometers and diameters of 20-60 nm. The vapor-solid mechanism was proposed to interpret the growth procedure of SiC nanowires. The expandable graphite as carbon source can provide enough growth space for nanowires, which is helpful to improve the yield of SiC nanowires. The simple method provides a promising candidate for industrial fabrication of SiC nanowires. 相似文献
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多炉芯法工业生产SiC材料研究 总被引:1,自引:1,他引:1
设计、研制成功了具有多炉芯结构的新型SiC冶炼炉,实验对比了在各种条件一致的情况下,传统的Acheson法与多炉芯加热法冶炼SiC产品。该技术在SiC工业生产中得到实际应用,工业生产实践表明多炉芯加热法的确的显著的节能降耗、提高产率和产量的作用,而且喷炉现象少、运行平稳、便于进一步使炉型大型化,具有重要和社会价值。 相似文献
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The use of heat-resistant titanium alloys for the manufacture of gas turbine engines components for aerospace/energy applications has become a routine exercise. However, components with complex designs specifications might pose manufacturing challenges especially when finishing processes are needed to enable their compliance with tight industrial standards for workpiece surface integrity. Information on polishing processes for such sensitive industrial applications is scarce. The paper reports on the influence of polishing methods/strategies on the quality and integrity of workpiece surfaces obtained after different polishing methods on Ti-6-4 heat-resistant alloy. The research focuses on identifying an “optimised” polishing strategy that will enable finishing a family of targeted safety critical aero-engine (TSCA-E) components, on which the simultaneous fulfillment of the following technological/quality criteria is required: (i) tool life to enable polishing of minimum of workpiece surface areas that are related with specific features of TSCA-E components; (ii) removal of pre-machining (i.e. milling) marks while obtaining required surface finish; (iii) generation of damage-free polished surfaces, i.e. high workpiece surface integrity. Two (belt; bob) polishing methods with various media/grades (Al2O3, SiC, polycrystalline diamond) of the abrasive materials in conjunction with three cutting media (dry; chilled air; minimum quantity of lubricant) have been tested to address the overall finishing of TSCA-E components. Although significant differences in tool life performance exist between belt and bob polishing methods, both are capable to meet the requirements of minimum workpiece surface coverage if “optimised” operating parameters are employed. When considering surface roughness criteria, Al2O3 belts and SiC bob tools were found appropriate. Furthermore, surfaces obtained with these tools when employing cooling media (chilled air for belt polishing and minimum quantity of lubricant (MQL) for bob polishing) showed compliance with the tight requirements of industrial standards for workpiece surface integrity (metallurgical damage and residual stresses). This proved that belt and bob polishing methods can be employed in conjunction as “hybrid” technique to enable automated overall finishing of complex geometrical components. 相似文献
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SiC颗粒增强铝基复合材料具有高的比强度、高的比模量、高的耐磨性以及优异的抗腐蚀性能,在机械结构轻量化设计方面是替换传统钢铁的最佳选择材料之一,在汽车、机械、航空及电子封装等领域具有广阔的应用前景。因此,备受各界科研工作者的关注。对SiC颗粒增强铝基复合材料的制备方法、性能、强韧化机制进行了归纳总结,分析并探讨了SiC/Al复合材料的制备技术难点及改进方法,最后对SiC/Al复合材料的研究及应用进行了总结与展望。 相似文献