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sheet     
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    Study on Key Technologies of Aluminum Alloy Sheet Warm Forming
    铝合金温成形关键技术的研究
短句来源
    Numerical Simulation of the Forming Defects for Multi-point Forming of Sheet Metal and Study on the Digital Manufacture of Titanium Prosthesis for Cranioplasty
    材多点成形缺陷的数值模拟及颅骨钛假体数字化制造研究
短句来源
    THE FRACTOGRAPHY OF A HOT-ROLLED 3% Si-Fe SHEET STEEL AND ITS DUCTILE-BRITTLE TRANSITION TEMPERATURE RANGE
    3%Si-Fe热轧脆变温区及其断口考察
短句来源
    QUALITY CONTROL IN THE WELDING OF 0.3mm THICK STAINLESS STEEL SHEET
    0.3mm不锈钢焊接质量控制的研究
短句来源
    SELECTION OF LONGITUDINAL STIFFNESS COEFFICIENT FOR WORKING STAND OF SHEET/BAND MILL
    带轧机工作机座纵向刚度系数的选择
短句来源
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  板材
    Finite Element Method Simulation and Experimental Research on Sheet Metal Shearing and Blanking Process
    板材剪切与冲裁加工过程有限元模拟及实验研究
短句来源
    Research on Intelligent Control Technologies for V Shaped Free Bending of Sheet Metal
    板材V型自由弯曲智能化控制技术的研究
短句来源
    Numerical Simulation of the Forming Defects for Multi-point Forming of Sheet Metal and Study on the Digital Manufacture of Titanium Prosthesis for Cranioplasty
    板材多点成形缺陷的数值模拟及颅骨钛板假体数字化制造研究
短句来源
    A NEW HIGH STRENGTH Mg-Zn-Y-Zr SHEET ALLOY
    高强度Mg-Zn-Y-Zr合金板材的研究
短句来源
    The Simplification of Forming Limit Curves of Sheet Metals and the Effect of Sheet Directionality on FLC
    板材成形极限曲线的简化及板材方向性对FLC的影响
短句来源
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  薄板
    The Study of Finite Element Analysis on Multi-Point Forming Process of Sheet Metal
    薄板多点成形过程有限元分析的研究
短句来源
    Prediction and Control of Welding Deformation of Sheet Structures
    薄板结构焊接变形的预测与控制
短句来源
    The Research on Springback Prediction and Its Application Technology in Sheet Forming
    薄板冲压回弹仿真计算及应用技术研究
短句来源
    Multiscale Simulation of Ni-Cr Sheet Deposited by EB-PVD
    EB-PVD Ni-Cr薄板沉积的多尺度模拟
短句来源
    EFFECT OF COPPER ON THE RECRYSTALLIZATION TEXTURE OF COLD ROLLED LOW CARBON STEEL SHEET
    铜对低碳镇静钢冷轧薄板再结晶织构的影响
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  板料
    Study on Principle and Process of NC Incremental Sheet Metal Forming
    金属板料数控渐进成形机理及工艺的研究
短句来源
    Drawbead Mechanics Characters and Influences in Sheet Forming
    板料成形中拉深筋的力学性能及影响因素研究
短句来源
    A Study of Drawabiliiy of Sheet Metal
    金属板料压延性能的研究
短句来源
    An Experimental Study of Superplastic Tensile Test and Blow Forming of TC3 Titanium Alloy Sheet
    TC3钛合金板料的超塑性拉伸及吹塑成形试验
短句来源
    A Research of Sheet Metal Forming Limit
    金属板料成形极限的研究
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  sheet
Let BH = {BH(t ), t ∈ ?N} be an (N, d)-fractional Brownian sheet with index H = (H1, .
      
Let $B^H=\{B^H(t), t\in {\Bbb R}_+^N\}$ be an (N, d)-fractional Brownian sheet with Hurst index H = (H1,...,HN) ∈ (0, 1)N.
      
In particular, we show that offsets to ellipses and hyperbolas are ofnonzero genus except for the circles, and somewhat surprisingly, that offsets to paraboloids and hyperboloids with one sheet can all be rationally parametrized.
      
From the FTIR spectra, it was found that during the transition process of polyamide 618, the intensity of the intra-sheet hydrogen bonds becomes weak.
      
This approach is different from the method of equivalent distributed current sheet and more suitable for electric machines, which have concentrated coils and deeper slots.
      
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Results of a comprehensive investigation on the sticking of thin steel sheets

本文叙述关于热叠轧薄板粘结的研究结果。比较全面和深入的研究说明,薄板粘结与许多因素有关,因此必须较全面地控制轨料、工具和加热情况以及轧制条件,才能较有效地减少粘结。实验结果指出,温度为影响粘结的主要因素之一,粘结随温度升高而增加。粘结随压下率的增加亦有增加。轧制速度适当地提高可以减少粘结。辊面光洁度对粘结亦有一定的影响,经常保持辊面的光洁度可以减少粘结。薄板轨后的冷却速度和方式,对粘结也有很大影响,故板堆不宜过高,且应使之加速冷却。氧化铁皮亦为影响粘结的主要因素之一,毫无氧化铁皮的表面可以在轧制过程中结为牢固的整体。加热和轧制均能改变薄板内磷的分布’而使薄板表面层的磷含量增加,因此少量的磷对减少粘结可以起显著的作用。粘结区的显微结构表现有五种不同的特征,足以说明造成粘结的多种原因。

Experience shows that plastic auisotropy between in plane of sheet and in thickness' direction of sheet as well as strain-hardenming of metal are benificial to its drawability. The main purpose of this survey is to indicate the relationship between them, and further-more a method of qualitative assessment of drawability (Calculation of limiting drawing ratio) is proposed. In this connexion, only a simple tention test is required. When solving the question, how to get a correct and reliable strength...

Experience shows that plastic auisotropy between in plane of sheet and in thickness' direction of sheet as well as strain-hardenming of metal are benificial to its drawability. The main purpose of this survey is to indicate the relationship between them, and further-more a method of qualitative assessment of drawability (Calculation of limiting drawing ratio) is proposed. In this connexion, only a simple tention test is required. When solving the question, how to get a correct and reliable strength of the critical cross-section in deep-drawing is the main point to be considered. In response to this, considering the combining effect of anisotropy and strain-hardenning of sheet metals and the condition oi collapse due to tention in complicated stress' condition, the author is proposing a formula to calculate the strength of critical cross-section in deep-drawing. The reliability of the formula and the correctness of the method for calculating limiting drawing ratio have been confirmed by the experimental results of seven diferent materials.

实践表明,金属板料在板平面与厚度方向之间的塑性異性,以及材料的应变刚,两者皆对其压延性能有利。本文从理论上分析了它们与压延性能之间关系,并进而提出一种定量评定板料压延性能的方法(计算极限压延系数),此时只须进行简单的拉伸机械试验即可。解决该问题的关键在于,如何可靠地确定压延危险断面强度。为此,本文考虑到上述的板料各向异性及应变刚的综合作用,并利用板料在复杂应力状态下的受拉失稳条件,得出了压延危险断面强度的计算公式。该公式本身以及计算极限压延系数的方法,其可靠性为七种板料的试验研究结果所证实。 本文为作者在北京航空学院付教授唐荣锡指导下,所完成的研究生毕业论文之一部分。在实验工作方面得到实验室同志的大力支持,在此顺致谢意。

The impact-toughness of a hot-rolled 3% Si-Fe sheet steel has been measured to in-

为了研究硅钢热轧板脆性随温度的变化,测定了不同温度下材料的冲击韧性值,得出3% Si-Fe的热轧板,存在一脆性转变温区,其上、下限温度分别约为+100°和0℃。在此范围内,冲击韧性对温度的变化极为敏感,变化量可达一个数量级以上;在此温区外,冲击韧性几乎不因温度而变化.可以解释为:3%Si-Fe的热轧板,在脆性转变温区的上限内处于塑性状态;低于下限温度时则处于脆性状态。因此,冷轧前将板卷预热到60—80℃是避免断裂的有效措施,此时,它处于塑性状态,也不致产生损坏最终磁性的时效现象。观察3%Si-Fe热轧板断口看出:脆性断口上占绝对优势的是沿{100}面的解理断裂,介于各解理面系间较窄的过渡区的晶面多属{110},在解理面上往往可以发现(110)滑移面露头的痕迹,解理的主要走向与这些滑移痕迹几乎平行,解理面上较大的解理台阶的面多属{110}:塑性断裂时,断口上存在大量区别于{110}面系的高指数面,即使在塑性断裂时也存在少量沿{100}的解理断裂。

 
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