查询词典 ageing

By adding appropriate copper stearated, melamine, the PVC U products have excellent properties of pulverization preventing and ageing resistance such as inoxidizable, uvioresistant, weatherproof, ageing resistant properties, and excellent heat stabilization.

在户外用PVC U型材配方中加入适量的硬脂酸铜和蜜胺，既可防止PVC U表面的粉化现象，同时又能抑制其耐热老化性能的降低。

Based on the failure analysis of hot roll, this paper optimizedly adjusts alloy system and summarizes the experience of rolling wiresand improves ail processing properties. Then, it analyses the effects on some natural parameters such as alloy transfer coefficient, surfacing layers, welding current and arc voltage etc.. It confirms the fitting ageing technique. Also, it discusses the microscopic structural transformation back and forth ageing and the effects on hardness change of overlaying metal by some alloying elements including C, Cr, V, W, Mo, Ni, Mn, B, Re through OM, SEM and X-ray diffraction analyses. Finally the abrasive resistance, red hardness, thermal fatigue property and anti-high temperature oxidability are investigated in experimentation.

全文在热轧辊失效分析的基础上优化调整合金体系，总结了焊丝轧制的经验，改善各种工艺性能，分析了几个特性参数的影响，确定了适宜的时效工艺，并通过光学显微镜、扫描电镜和X-射线衍射对时效前后的显微组织转变以及部分合金元素如C、Cr、V、W、Mo、Ni、Mn、B、Re对堆焊层硬度变化的影响进行分析，最后通过试验考察了堆焊层金属的耐磨粒磨损性能、红硬性、耐热疲劳性和抗高温氧化性。

The cation radical film exhibits an ageing effect, i.e. the changes in the physical or chemical properties of the film with time, following its deposition. It was found that because of a strong intermolecular interaction, ageing effect resulted in different aggregation states of cation radicals in the deposited film, and the film lost its reoxidation activity.

实验表明，由于分子间存在强烈的相互作用，陈化效应导致沉积膜中阳离子基具有多种不同的聚集状态，并导致沉积膜失去重新氧化的活性。

Again, there are two kinds: increasing ageing and extinguishing and breaking ageing.

当然，这而有两类成长的衰老熄灭和破坏的衰老。

The results show: TiC particulates can act as nucleates of α-Al and enter into α-Al during solidification. They also can act as nucleates of S' phase during ageing, there are a lot dislocations around TiC particalates, which accelerate ageing process of 2024/TiC composites.

研究表明：TiC颗粒能作为α—Al形核核心，在凝固过程中进入α—Al基体；在时效过程中，TiC颗粒可以作为S′相的衬底，其周围存在大量位错，加快了复合材料的时效进程。

Not mainly the ageing of resins and asphaltenes but that of saturates and aromatics cause the ageing of asphalt.

沥青热氧老化的原因主要是饱和分和芳香分的氧化，而不是胶质和沥青质的氧化。

The influence of light stabilizing agents, antioxidant agents, colour masterbatch and filler of CaCO 3 on ageing behavior of speciality was studied by artificial accelerated ageing tests of carbon arc lamp and fluorescent UV-B type light.

选择国产基础树脂与稳定剂，采用碳弧灯和B型荧光紫外灯人工加速老化试验，研究了光稳定剂品种、用量、与抗氧剂的复配及色母粒、重钙母粒对专用料老化性能的影响。

The results show that the damping capacity of Zn-22%Al remains constant for ageing temperature below 80℃, the warm rolling temperature. Traces of Ce and La can improve the damping capacity of water quenched and warm rolled Zn-22%Al, and decrease the reduction of the damping capacity of Zn-22%Al during ageing at 150℃.

结果表明，经水淬后80℃温轧的Zn-22%Al合金在低于温轧温度下时效时，其阻尼性能保持稳定；微量Ce，La的加入，提高了经水淬后80℃温轧的Zn-22%Al合金的阻尼性能，减缓了经150℃时效后阻尼性能的降低。

The results show that BS 460MPa grade reinforced bar can be produced all from Q235 or 20MnSi billet by the remained heat treatment process but the production cost of the former is lower. When the water pressure minishes, the intensities of reinforced bar reduce; the higher the temperature at the entrance of cooling bed is, the lower the intensities are. Therefore, the commendatory process parameters are that five stages coolers should be opened, water pressure should be all 1.8～2.0MPa and the temperature at the entrance of cooling bed of Q235 reinforced bar should lower than 650℃. The typical microstructure(Q235): the surface layer is tempered sorbite; the transition layer is pearlite and ferrite, and the partial ferrite is acicular; the core is pearlite and ferrite and the grain fineness is 8～10 grade. The yield strength is reduced by 10～20MPa after natural ageing and it can be simulated by artificial ageing(100℃×2h or 200℃×1h).

结果表明，Q235和20MnSi钢都可以利用余热处理工艺生产出性能合格的钢筋，但前者的生产成本较低；水压减小，钢筋强度降低，上冷床温度越高，强度越低，推荐5段水冷器全开，水压均为1.8～2.0MPa，Q235钢筋的上冷床温度应控制在650℃以下；钢筋典型的金相组织（Q235）表层为回火索氏体，过渡层为珠光体+铁素体且部分铁素体呈针状，心部为珠光体+铁素体，晶粒度8～10级；自然时效后屈服强度下降10～20MPa，用人工时效可以模拟自然时效，工艺是100℃×2h或200℃×1h。

Ageing : we process a 12 months barrel ageing in oak tuns i.e.

陈年：橡木桶陈年12个月。

When this condition occurs, inbound replication with the source partner is stopped on the destination domain controller and event ID 2042 is logged in the Directory Services event log.

计算机密码学是研究计算机信息加密、解密及其变换的科学，是数学和计算机的交义学科，也是一门新兴的学科。

Instructions: click on the thumbnails to see a larger image, then use the left-right arrow keys to scroll through the slideshow.

使用说明：滑鼠点在小图上即可放大观赏。开启后键盘左右键可用来换照片。