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采用发射光谱/脉冲分辨联用技术测定夹杂物粒度分布

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冶金分析 2013年第3期33卷 9-13页

作者： NASTASI G WESTEr r COLLA V NOLL r Scuola Superiore Sant'Anna-TeCIP institute Pisa 56124Italy fraunhofer-institut für lasertechnik Aachen 52074Germany

通过解析发射光谱和脉冲分辨分析联用技术(OES/PDA)数据确定钢铁中夹杂物的类型及计算其粒度分布需要借助于高等数学方法,以便在大量的数据中滤出那些与夹杂物相关的OES/PDA数据,从而找到可靠的该数据集的离群数据。强度及大多的质量分... 详细信息

通过解析发射光谱和脉冲分辨分析联用技术(OES/PDA)数据确定钢铁中夹杂物的类型及计算其粒度分布需要借助于高等数学方法,以便在大量的数据中滤出那些与夹杂物相关的OES/PDA数据,从而找到可靠的该数据集的离群数据。强度及大多的质量分布其分布函数都是非正态分布的,因此,通过对这些数据进行拟合即可得到非属于该正态分布的离群数据。离群数据确定后,通过这些信息可找到与一些特定夹杂物类型相关联的数据群。基于此目的,发现一种称为"自组织特征映射(SOM)"的数学方法非常适于进行此项研究。根据离群数据及夹杂物类型的相关信息,采用该方法可以计算出质量分布并能进一步进行不同夹杂物类型的粒度分布计算。

关键词：钢脉冲分辨技术夹杂数据处理

recent Developments in CO2 Lasers

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Recent Developments in CO2 Lasers

选区激光熔化制备原位TiN-Ti5Si3复合材料的显微组织

1992 International Conference on Lasers and Optoelectronics(ICLOE’92)

作者： Keming DU fraunhofer institut fr lasertechnik Steinbachstr.155100 AachenGermany

1 Introduction CO lasers have been used in industry mainly for such cutting,welding and surface *** conduct a broad spectrum of high-speed and high-quality applications,most of developments in industrial CO lasers at the ILT are aimed at increasing the output power,optimizing the beam quality and reducing the production

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金属学报 2010年第6期46卷 761-768页

作者：顾冬冬沈以赴南京航空航天大学材料科学与技术学院南京210016 fraunhofer-institut fiir lasertechnik ILT Aachen D-52074Germany Lehrstuhl für lasertechnik LLT Rheinisch Westfalische TechnischeHochschule(RWTH)AachenAachen D-52074Germany

利用高能球磨制备了Si_3N_4-Ti(摩尔比1:9)纳米复合粉末,Si_3N_4和Ti平均晶粒尺寸均小于20 nm,之后进行选区激光熔化成型,通过9Ti+Si_3N_4=4TiN+Ti_5Si_3反应生成TiN增强Ti_5Si_3基原位复合材料.延长球磨时间,Si_3N_4-Ti复合粉末颗粒细... 详细信息

利用高能球磨制备了Si_3N_4-Ti(摩尔比1:9)纳米复合粉末,Si_3N_4和Ti平均晶粒尺寸均小于20 nm,之后进行选区激光熔化成型,通过9Ti+Si_3N_4=4TiN+Ti_5Si_3反应生成TiN增强Ti_5Si_3基原位复合材料.延长球磨时间,Si_3N_4-Ti复合粉末颗粒细化且比表面积增加,激光成型的TiN-Ti_5Si_3复合材料致密度可增至97.2%,成型组织中TiN增强相形貌经历多棱角状→近圆形→枝晶状的转变.

关键词： TiN-Ti5Si3复合材料选区激光熔化显微组织

Laser-based manufacturing concepts for efficient production of tailor welded sheet metals

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Advances in Manufacturing 2014年第3期2卷 193-202页

作者： Marius Sp?ttl Hardy Mohrbacher WISCO lasertechnik GmbH RavensburgGermany NiobelCon bvba SchildeBelgium

Laser welding is an established manufacturing technology for a large variety of automotive applications due to its attractive properties such as low heat input, high precision and fast welding speed. Especially when welding high strength steels, which are dominantly used in today＇s car body construction, the low heat input by laser welding bears significant advantages with regard to the properties of the weld seam. The exploitation of the full application potential of laser welding in mass production requires an appropriate manufacturing concept and corresponding auxiliary technologies. The present paper demonstrates the integration of laser welding into the surrounding manu- facturing concepts by a modular setup with different levels of automation. This approach offers flexible solutions for individual needs thereby optimizing investment cost, labor cost and productivity. recently available laser sources enable exceptionally high welding speed on thin gauged sheet metals but require efficient material handling con- cepts to utilize the full speed potential. Industrial concepts are presented offering efficient material handling and high process robustness for mass production welding.

关键词： Laser welding Tailored blanks Tailoredcoils Material handling Process robustness Laser beamsplitting Turbo-welding Weld edge conditioning

Innovative manufacturing technology enabling light weighting with steel in commercial vehicles

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Advances in Manufacturing 2015年第1期3卷 3-18页

作者： Hardy Mohrbacher Marius Spottl Jesse Paegle NiobelCon bvba SchildeBelgium WISCO lasertechnik GmbH RavensburgGermany Gestamp Sao PauloBrazil

Improved manufacturing technology is often needed when working with high strength steel. In this re- spect manufacturing technology has to adapt to the altered （and typically reduced） formability and weldability of modern high strength steel. However, this is a rather passive approach from a manufacturing point of view. An indeed much more powerful approach is to generate synergies between innovative manufacturing technology, design and material enabling additional weight savings and efficiency gains. Laser-based material processing, in particular laser welding, offers a wide range of opportunities in this sense. furthermore, hot stamping and roll forming open up new possibilities for advanced manufacturing of commercial vehicle components. Applications and examples of these technologies will be given in terms of producing innovative semi-products as well as final components.

关键词： Commercial vehicles . Light weightingstrength steel . roll forming - Press forming - Hotstamping . Tailor-welded blanks .Tailor-welded coils

Targeting new ways for large-scale,high-speed surface functionalization using direct laser interference patterning in a roll-to-roll process

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International Journal of Extreme Manufacturing 2023年第3期5卷 569-583页

作者： Christoph Zwahr Nicolas Serey Lukas Nitschke Christian Bischoff Ulrich radel Alexandra Meyer Penghui Zhu Wilhelm Pfleging Laser Precision Manufacturing Fraunhofer Institute for Material and Beam Technology(IWS)DresdenGermany Topag lasertechnik GmbH DarmstadtGermany institute of Manufacturing Science and Engineering Technical University DresdenDresdenGermany institute for Applied Materials—Applied Materials Physics(IAM-AWP) Karlsruhe Institute of Technology(KIT)Eggenstein-LeopoldshafenGermany

Direct Laser Interference Patterning(DLIP)is used to texture current collector foils in a roll-to-roll process using a high-power picosecond pulsed laser system operating at either fundamental wavelength of 1064 nm or 2nd harmonic of 532 *** raw beam having a diameter of 3 mm@1/e^(2) is shaped into an elongated top-hat intensity profile using a diffractive so-called fBS■-L element and cylindrical *** shaped beam is split into its diffraction orders,where the two first orders are parallelized and guided into a galvanometer *** deflected beams inside the scan head are recombined with an f-theta objective on the working position generating the interference *** DLIP spot has a line-like interference pattern with about 15μm spatial *** fluences of up to 8 J cm^(-2) were achieved using a maximum pulse energy of 0.6 ***,an in-house built roll-to-roll machine was *** this setup,aluminum and copper foil of 20μm and 9μm thickness,respectively,could be *** to current collector structuring coating of composite electrode material took *** case of lithium nickel manganese cobalt oxide(NMC 622)cathode deposited onto textured aluminum current collector,an increased specific discharge capacity could be achieved at a C-rate of 1℃.for the silicon/graphite anode material deposited onto textured copper current collector,an improved rate capability at all C-rates between C/10 and 5℃ was *** rate capability was increased up to 100%compared to reference *** C-rates between C/2 and 2℃,the specific discharge capacity was increased to 200 mAh g^(-1),while the reference electrodes with untextured current collector foils provided a specific discharge capacity of 100 m Ah g^(-1),showing the potential of the DLIP technology for cost-effective production of battery cells with increased cycle lifetime.

关键词： DLIP lithium-ion battery surface texturing copper aluminum

Innovative Laser-based Manufacturing Concepts and Equipment for Efficient Steel Processing

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Innovative Laser-based Manufacturing Concepts and Equipment ...

第八届（2011）中国钢铁年会

作者： Spttl Marius Mohrbacher Hardy ThyssenK rupp lasertechnik GmbH RavensburgGermany NiobelC on bvba SchildeBelgium

Laser welding has seen countless applications over the last two decades due to its attractive properties such as low heat input, high precision and speed as well as versatile and automatic handling. The exploitation of the full application potential of laser welding requires an appropriate manufacturing concept and the corresponding technology. The integration of laser welding（and cutting） into larger manufacturing processes or into stand-alone systems will be demonstrated using examples of ThyssenK rupp lasertechnik’s experience of over 20 years in this field. More specifically the modular setup of such manufacturing concepts and the different level of automation will be indicated to offer individual solutions for different needs and budgets of small ＆ medium sized as well as large enterprises. The demonstrated applications range from flat sheet, profiles, tubes to rods made from carbon steel or stainless steel.

关键词： laser welding laser cutting coil welding tailored blanks tailored orbitals

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用新激光技术揭示潜伏的癌细胞

德国医学 2001年第2期18卷 112-114页

作者： MarkusSauer 武忠弼 Physikalisch-Chemisches institut der Universitat Heidelberg 华中科技大学同济医学院

将单个分子加以显示,是一个既重要又困难的研究课题,例如要想观察各种酶在细胞内是怎样互相合作的,就必须找到精巧的技术,诀窍之一就是使用带有发光染料的探针,一旦它发现了目标分子,该分子就会发光。德国海德堡大学物理化学研究所的Mar... 详细信息

将单个分子加以显示,是一个既重要又困难的研究课题,例如要想观察各种酶在细胞内是怎样互相合作的,就必须找到精巧的技术,诀窍之一就是使用带有发光染料的探针,一旦它发现了目标分子,该分子就会发光。德国海德堡大学物理化学研究所的Markus Sauer描述了这一方法,并认为其大有前途,例如可用于建立新的检测系统,以早期发现乳腺癌等。

关键词：癌细胞潜伏性激光技术