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It was found that increasing pressure for blank can improve the compactedness of blanks so as to make foam aluminium materials with homogeneous pores. Foaming temperature, as one of the main influencing factors on foaming process, should be controlled higher than the melting point of Al or Alalloy to a certain extant in order to keep a reasonable viscosity. Thus, the foam aluminum with homogeneous pores and high porosity is available. As shown by experiments, such materials should be made on conditions that they shall be protected with molten salt under 300?MPa pressure at 675~680?℃.

研究了粉末冶金法制备泡沫铝材料的方法讨论了发泡过程中的保护方式、制坯压力、发泡温度等参数对泡沫铝体积质量、孔隙率、孔结构的影响,并对发泡机理进行了探讨增大制坯压力使得金属坯致密,可以得到孔结构均匀的泡沫铝材料;发泡温度是影响发泡的主要因素之一,发泡温度控制在高于铝或铝合金熔点,同时保持熔体具有一定粘度的范围内,能够得到孔结构均匀、高孔隙率的泡沫铝材料实验结果表明:采用熔盐保护方式,在300MPa的压力下,温度在675~680℃时,可得到孔径均匀、孔隙率高的泡沫铝材料。

The low-phosphorus and low-carbon Al-Si-Mn ferroalloy is produced with aluminium and common silicomanganese in certain proportion and through adding proper amount of Ca-Ba dephosphorizing agent for high temperature dephosphorizing and decarbonizing and adding proper amount of pure aluminum and clean waste steel.

本发明按一定比例的铝、普通硅锰合金,加适量的钙、钡系脱磷剂进行高温脱磷脱碳,再根据产品成份的要求补加金属锰,加入所需的纯铝及纯净废钢,获得的低磷低碳铝硅锰铁合金的组成为:Al 5~20%,Mn 50~70%,Si 8~20%,C≤1.0%,P≤0.1%,S≤0.03%,余量为Fe。

In addition, a printing plate edge marked slopes or plate is too thin, or short-run printing of excessive wear lighter, so that the short-run suites and whitespace differences of high and low is too low and too soft pads, resulting in suites blank areaand, electro-chemical layer of aluminum foil, etc, should be made at the edge version slope near 90-degree right-angle (such as seihan with carving techniques that help you make little gradient edge version), according to the characteristics of the short-run suites, with thickness larger plate seihan, and a blank site, using a corrosion deeper stereoplasm lining for short-run; in addition, you should choose thin aluminized layer of anodized, adjust the appropriate business card printing and membership card making and adjusted pressure volume drum uponsize pressuer letoff drum.

此外,印版边沿存在明显的斜坡度或版材太薄,或印版过量烫印磨损变浅,使烫印版面与空白的高低差异太小,衬垫材料过软,造成版面空白部位与电化铝箔层接触等,应将版边沿坡度制成近90 度的直角(如采用雕刻工艺进行制版,可使版边沿几乎没有坡度),根据烫印版面的特点,采用厚度大一些的版材制版,并将空白部位腐蚀深一点,采用硬质包衬进行烫印;此外,应选择镀铝层较薄的电化铝,调整合适的制卡和会员卡制作压力,并适当调整压卷滚筒压力和收卷滚筒拉力。

In order to illustrate the phenomena occurred in the technological experiments, the infiltration dynamics of liquid aluminum into porous media was simulated in accordance with the laws of similitude. The results show that (1) the relation between the displacement of infiltration front and the advancing time is 〓;(2) the pressure of infiltration changes with time according to 〓;(3) the distribution of pressure in the direction of infiltration length is P=a〓+b〓L.(4) the change of temperature or viscosity of molten aluminum affects infiltration velocity in fillers of diameter in the range of 1. 5~5. 5mm very little, but this velocity in fillers of diameter 0.5mm is reduced with the decrease of AL temperature.

为了说明工艺试验中显示的各种现象,作者根据相似原理,采用模拟试验研究了铝液在多孔介质中的渗流过程,得到铝液渗流动力学规律如下:(1)渗流前沿位移—渗流进行时间关系为〓;(2)渗流压强随渗流时间的变化规律为〓;(3)渗流压强沿渗流长度分布为P=a〓+b〓L;(4)铝液温度降低或粘度加大时,对大于1.5mm的颗粒之间的渗流速度影响不大,但使0.5mm颗粒之间渗流速度减小。

The premary tests show that three of them can obviously improve the mechanical properties of soft PVC/L-CaCO3 materials;however, they almost heve no effect on PP/L-CaCO3 blends. This suggests that the coupling effect of the aluminates be not only re...

初步试验表明,有3种铝酸酯可明显提高软质PVC/L-CaCO_3共混物的力学性能,但4种铝酸酯对PP/L-CaCO_3共混物的力学性能均无改善,说明铝酸酯的偶联作用不但与它们的分子结构有关,而且和偶联的对象有关。

With the help of recommended abrasives and techniques, through the process of heating – roughly hot rolling – precisely hot rolling in a variety a machines, hot rolls can be shaped into high-precision aluminium belts, which shall better meet the growing needs of the PS baseboards for pots and the simifinished aluminium foil sheets, for there is a big market gap and high grade request for high-precision aluminium belts in the market.

三、建设规模:年产40万吨高精度铝板带热轧卷;工艺技术:采用国际先进的热轧生产技术,由铸锭经加热—热粗轧—多机架热精轧的生产工艺,配合引进的工艺技术磨具可满足制罐料 PS 板基、双零铝箔坯料等市场缺口大的高精度铝板带产品对热轧卷的质量要求;主要设备:包括铸锭铣床一台、推进式加热炉3台、2400mm1+4热连轧生产线一条、轧辊磨床2台(国外引进1台),预计引进设备需用外汇8000万美元。

The invention relates to a method for preventing a top metal layer of packaging chips from fracturing under high temperature, which avoids the fracture of the top metal layer caused by the inter-diffusion of a gold ball, an aluminum welding pad and a top layer metal by introducing a lower metal layer to the joint between the top layer wire and the aluminum welding pad and driving a metal plug to the joint between the top metal layer and the lower metal layer and a metal plug to the joint between the lower metal layer and the aluminum welding pad.

一种防止封装芯片上的顶层金属层在高温下断裂的方法,通过在顶层金属线和铝焊垫之间连接处引入下层金属层,并在顶层金属层和下层金属层之间的连接处以及下层金属层和铝焊垫之间的连接处打金属插塞,避免了因金球、铝焊垫以及顶层金属相互扩散造成的顶层金属层断裂。

The forming process and the characteristics of plastic deformation, the sites of the heavily strained zones with severe thickness reduction and their evolution, the influences of the main processing parameters, such as the plastic melt pressure and its distribution from the gate to the end of the mold, and of friction coefficient between the sheet flange and the mold, on these during the hybrid forming of the aluminum sheet have been revealed by the updated Lagrange finite element formulation for the finite elastic-plastic deformation.

运用弹塑性大变形更新的Lagrange有限元方法,揭示了铝薄板的成形过程和塑性变形的特点与规律、大塑性变形区的产生位置及其塑性变形特点,探明了复合成型过程中塑料熔体压力及其分布规律以及铝薄板凸缘与模具摩擦系数等主要工艺参数对铝薄板成形过程和塑性变形的影响规律。

The distribution of thickness rolled and profile are simulated by considering roll system elastic deformation theory, distributions of tension stresses theory and roll thermal crown theory during rolling of wide strip and high speed aluminum foil roughing mill the rolling technology and thermochemistry parameters are tested, etc, the paper verifies above theories.

采用差分法模拟了具有分段冷却装置的宽幅高速铝箔粗轧机轧辊的温度场及热凸度分布。对轧辊热形为特性进行了全面的研究。首次考虑铝箔轧制的辊系弹性变形理论。张应力分布理论及轧辊热变形理论模拟了宽幅高速铝箔粗轧机的轧后断面形状及板形。

Based on the index weight indicators and benchmarks,the paper discusses the design principles and ideas of establishing evaluation index system for recycling economy,establishes evaluation index calculation method of cleaner production in aluminum industrial enterprises in order to reach the following indic...

从确定指标权重以及指标基准值的角度入手,探讨了循环经济评价指标体系的设计原则、构建思路;给出了铝工业企业清洁生产评价指标的考核评分的计算方法,得出了铝行业企业的生产系统评价指数、企业综合评价指数;构建了电解铝行业循环经济的评价指标体系,并详细分析每个指标,为铝行业发展循环经济提供了参考依据和理论借鉴。

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