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A. A. Babakov 《Metal Science and Heat Treatment》1967,9(10):764-770
Conclusions Highly alloyed steels and alloys are produced in conformity with GOST or technical specifications in thick and thin sheets, beams and channels, bars, hot-rolled and cold-rolled pipe, and rod. Castings are produced in the specialized plant of the Ministry of Chemical and Petroleum Machine Building.The technology of welding stainless steels and alloys is given in [15] and [16].TsNIIChERMET. Translated from Metallovedenie i Termicheskaya Obrabotka Metallov, No. 10, pp. 43–50, October, 1967. 相似文献
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模具渗硼工艺及其发展应用 总被引:4,自引:0,他引:4
渗硼是提高模具使用寿命的重要途径,是在金属表面形成高硬度的金属硼化层,显著提高其耐磨性,且具有良好的耐热性和耐蚀性。近年来,随着渗硼工艺逐步改进和完善,已发展了复合渗、多元共渗及低温渗硼工艺,取得了良好的经济效果。 相似文献
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A. Yu. Tsivadze G. V. Ionova V. K. Mikhalko 《Protection of Metals and Physical Chemistry of Surfaces》2010,46(2):149-169
The possibility of using unique properties of lanthanides in the nanotechnology is demonstrated. The origination of linear
and nonlinear optical properties of lanthanide compounds with phthalocyanines, porphyrins, naphthalocyanines, and their analogs
in solutions and condensed state and the prospects of obtaining novel materials on their basis are discussed. Based on the
electronic structure and properties of lanthanides and their compounds, namely, optical and magnetic characteristics, electronic
and ionic conductivity, and fluctuating valence, molecular engines are classified. High-speed storage engines or memory storage
engines; photoconversion molecular engines based on Ln(II) and Ln(III); electrochemical molecular engines involving silicate
and phosphate glasses; molecular engines whose operation is based on insulatorsemiconductor, semiconductor-metal, and metal-superconductor
types of conductivity phase transitions; solid electrolyte molecular engines; and miniaturized molecular engines for medical
analysis are distinguished. It is shown that thermodynamically stable nanoparticles of Ln
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M
y
composition can be formed by d elements of the second halves of the series, i.e., those arranged after M = Mn, Tc, and Re.
Prospects of using lanthanide superconductors in nanotechnology are considered. 相似文献
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《稀有金属材料与工程》2006,23(4):23-26
结合近年来现场试验与施工实践,分析研究了中小型镍材(工业纯镍)设备与管道的特点、性能、焊接缺陷与产生原因,以及防止与消除其缺陷、优化制造施焊质量的工艺措施,并总结了若干条注意事项。 相似文献
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金刚石、CBN有序排列及择优取向工具的研发及应用 总被引:1,自引:0,他引:1
有序排列/择优取向超硬材料工具的技术创新,将广泛适用于电镀、树脂、陶瓷、金属结合剂制品工具中,使用超硬材料颗粒在结合剂中均匀排列并择优定向,以最大潜能的发挥超硬材料各个方面固有的特性。并针对不同的加工对象,有选择性的使用超硬材料各自不同的特性,从而使超硬材料工具将以经济、高质与高效的优势替代传统的超硬材料工具并将进入新兴的加工领域,为生产企业带来新的发展机遇。本文将对有序排列与择优取向技术的研究现状及其在不同的金刚石工具中的应用做一阐述。 相似文献
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V. Kulikovsky V. Vorlí?ek M. Stranyánek R. ?tvrtlík A. Kurdyumov 《Surface & coatings technology》2008,202(9):1738-1745
Hydrogen-free amorphous and nanocrystalline films were prepared by magnetron sputtering of the SiC or Si targets. Mechanical properties (hardness, elastic modulus, intrinsic stress) and film structures were investigated in dependence on the substrate bias and temperature. It was found that both hardness and elastic modulus of all amorphous a-SiC films prepared at different substrate temperatures and biases are always lower than those for bulk α-SiC single crystal while the hardness of partially crystalline SiC films is higher and the elastic modulus lower than those for α-SiC one. In contrast, both hardness and elastic modulus of all amorphous Si films are always lower than those for nanocrystalline Si films which show approximately the same value as the Si single crystal. 相似文献
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分析了油气管道焊工培训的现状,介绍了石油天然气集输气管道焊工培训的机构组成.阐述了焊工培训在油气管道施工中的重要作用以及对油气管道焊工培训、考核的具体内容,提出了对油气管道焊工培训技能教师的要求,展望油气管道焊工培训的发展趋势. 相似文献
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齿轮类零部件的选材及热加工分析 总被引:1,自引:0,他引:1
分析了齿轮类零部件材料的正确选择及热加工处理工艺(热处理工艺、焊接工艺).采用电子束焊接这类零部件,合理匹配齿轮的选材和热处理工艺,可有效防止在制造和运行时产生的失效,从而保证了零部件的制造质量和安全运行,提高了生产效率. 相似文献
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软起动器及其应用设计和调试 总被引:1,自引:0,他引:1
软起动是电机起动一种新概念,跟传统的直接起动、星三角起动,自耦降压起动相比,有很大的优点。本文在介绍软起动的基础上,分析了软起动器在应用没计、现场调试及使用中应注意的问题。 相似文献
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J. Chris Johnston Ph.D. David A. Thompson 《JOM Journal of the Minerals, Metals and Materials Society》1993,45(10):14-19
Scientific visualization is the application of modern techniques in computer graphics to make the results of science and engineering studies more effective. Visualization allows the researcher to take in a large quantity of data at a single glance, developing an understanding of the data and the relationship between factors that would be difficult to obtain with a more conventional presentation. The addition of animation provides even greater power, enabling one to better understand the changes that occur over time. 相似文献
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