铝合金

The characteristic of machined surface of high speed machining aluminum alloy 7050-T7451 is researched by micrographic experiments and analysis. The formation mechanics of machined metamorphism layer has been analyzed and studied. The dislocation-energy model in machined metamorphism layer was established and applied to explain the micrographic mechanics work-hardening using the thermo-mechanical coupling deformation theory and dislocation theory. The experimental results show that the interaction of high dislocation density effect on hardening is more remarkable than that of thermal stress in high speed machining.

利用显微观察方法对铝合金7050-T7451高速铣削加工的工件表面断面和不同深度的表层的微观形貌特征进行系统的研究，确定了高速切削加工铝合金7050-T7451的表面变质层深度为30～35μm；应用位错能量研究了高速铣削加工过程的热力耦合对变质层的影响机理，并通过微观形貌观察证明：与普通切削相比，高速铣削表层塑性变形的能量和位错密度更高；建立了位错密度的加工硬化的动力学模型，研究了加工硬化的热-力耦合形成机理；对微观裂纹的形成机理进行了理论分析，证明位错密度高的高速切削过程中较低速加工更容易产生明显的微裂纹，从分子级乃至原子级的水平进一步揭示高速切削加工表面变质层的形成特征。

For the effect of surface oxidation on emissivity:(1) most oxidized samples have higher emissivity than unoxidized samples, except AL 2024 and AL 7005. The exception is due to roughened surface caused by the onset of melt and the change of surface color at high heating temperature.

铝合金有氧化与无氧化对放射率的影响：(1)大部份铝合金有氧化的放射率皆大於无氧化的放射率，除了AL 2024与AL 7005，因为熔化造成表面粗糙度增加及高温加热时表面色泽的改变导致无氧化的放射率大於有氧化的放射率。

Overall, emissivity of both oxidized and unoxidized samples increases with increasing temperature;(2) emissivity of unoxidized sample doesn t change with time. However, emissivity of oxidized sample increases due to the growing oxide layer with time;(3) a stronger effect of alloy composition is evident for oxidized samples.

整体而言，有氧化与无氧化之放射率皆随著加热温度增加而上升；(2)铝合金於开放环境之放射率随加热时间增长而明显上升，但在真空腔体内之铝合金其放射率却不随加热时间增长而改变，因为氧化层会随著时间增加而成长进而造成表面放射率上升；(3)合金成份对放射率的影响在氧化下比无氧化呈现显著的差异。

The effects of Si and Fe in aluminum alloy on the soldering tendencies had been studied by hot dip aluminizing.

通过热浸铝试验，分析了铝合金中的Si、Fe元素对铝合金熔体与模具钢间的相互作用及焊合倾向性的影响。

The results showed that for both of the alloys grains were obviously refined to same extent with increase in Ti content, and the grain sizes were coarsened to some extent due to evident fading of Ti effect during melt holding period....

随着保温时间的延长，所有合金的晶粒尺寸均不同程度发生了粗化，Ti对晶粒的细化效果明显发生了衰退。电解加钛铝合金晶粒细化效果的抗衰退能力优于熔配加钛铝合金，这种趋势对Ti的质量分数为 0 。1%～ 0 。2 %的合金特别明显。

Series LQJ AL-alloy cable bracket is made of standard AL-alloy section material, In the course of manufacture the Company has absorbed the feature of large span from the foreign advanced similar products, improved the productive technology: after the oxygenating treatment for the rivets (it can overcome many evils due to the rust of general fasteners and the deformation from welding etc) there fore to raise the quality of products and prolong the service life.

LQJ系列铝合金电缆桥架是以高强度、耐腐蚀铝合金标准型格，根据国外同类产品，吸取了大跨距桥架的特点，改进生产工艺，各零部件表面经氧化处理后，采用不锈钢紧固件或铆钉固定成型，克服了一般紧固件锈蚀和焊接变形等许多弊病，从而提高了产品质量，延长了使用寿命。

The microstructure evolution of spray formed high silicon aluminum alloy s which arte reheat to semi-solid state and soaped in semi-solid temperature has been studied in this paper.

本文研究了喷射沉积高硅铝合金在半固态保温过程中组织演变规律，结果表明喷射沉积高硅铝合金在半固态保温过程中硅相的粗化符合 Ostwald 粗化规律，数学回归分析表明硅相平均直径的三次方与保温时间成正比例。

It greatly reduces the noise from the discontinuous spectrum in the arc and adapts to the seriously fluctuating welding current during the process and obtains the clear images of the welding pool using common industrial CCD camera.

在对铝合金焊接光谱分析的基础上，以焊接电弧光中的连续光谱作为光源，采用宽带滤波方法设计的全新的光学图像传感器，利用普通工业CCD摄像机获得了画面清晰、质量稳定的铝合金焊接熔池区域图像。

The effects of the composition of plating assistant agent. Temperature of hot-dip medium, time of working and contents of silicon on hot-dip Zn-Al alloy coating were investigated. Optimum galvanizing medium composition and technological conditions were also discussed.

研究了钢基热浸镀锌铝合金镀过程中，助镀剂的组成、镀液温度、浸镀时间、钢基硅含量等因素对镀层厚度的影响，获得了一种耐腐蚀性好、结合力强和光滑的热镀锌铝合金层。

The test results indicate that T2 Cu/2A50 Al alloy must first be done by blacksmith welding, and then heated between 515℃ and 525℃ for 180 min, the sample pressure is offered by heating and insulation in the process through special fixture, the joints of T2Cu/2A50Al alloy with metallurgy bond can be obtained, and there is obvious welding seam in the interface.

试验结果表明，T2铜／2A50铝合金，采用先锻接，后加热到515~525℃之间，保温180 min，并在加热和保温过程中通过特殊的夹具提供给试样压力，能得到冶金结合的T2铜／2A50铝合金接头，接头界面处出现了明显的焊缝。

They weren't aggressive, but I yelled and threw a rock in their direction to get them off the trail and away from me, just in case.

他们没有侵略性，但我大喊，并在他们的方向扔石头让他们过的线索，远离我，以防万一。

In slot 2 in your bag put wrapping paper, quantity does not matter in this case.

在你的书包里槽2把包装纸、数量无关紧要。