查询词典 hard alloy

The results show that the rare earth element Ce can codeposit with cobalt-base alloy, and with increase of mass added of Ce in solution, the content of Co, Ni, Ce in alloy increases and the content of B decreases. Ce can increase plating rate of alloy in some range of content. The rare earth makes deposition potential mve in positive direction and polarizability decrease.

结果表明，在水溶液中稀土元素Ce可以与钴基合金实现共沉积，且随着镀液中Ce的浓度的增大，合金镀层中Ce、Co和Ni的含量逐渐升高，B含量降低；且Ce在一定范围内能够明显提高合金的沉积速度；稀土还使Co-Ni-B合金的析出电位发生了正移，减小了极化度。

The results show that La can refine the microstructure of Zn-22%Al alloy, slow down the grain growth and reduce the equiaxial degree during ageing, that the strength of Zn-22%Al-alloys and Zn-22%Al alloy remains constant after ageing below the warm-rolling temperature, and that La can improve the strength and the stability of mechanical properties of Zn-22%Al alloy.

结果表明：La具有细化Zn-22%Al合金的组织并阻碍时效时晶粒长大和等轴程度降低的作用；在低于温轧温度(80 ℃)下时效时，加La和不加La的Zn-22%Al合金的室温力学性能保持不变； La可提高Zn-22%Al合金的强度以及时效时力学性能的稳定性。

The catalytic performance of all the amorphous alloy catalysts mentioned above was measured during liquid phase hydrogenation of furfural to furfuryl alcohol, together with the kinetic studies. The relationship between the catalyst performance and the structure of catalyst, surface electronic state of the amorphous alloy has been systematically studied based on a series of characterization of catalysts . Meanwhile, the promoting effects of the support on the thermal stability and catalytic activity of the amorphous alloy catalysts have been discussed.

本文采用一系列的表征方法(XRD、XPS、TEM、BET、氢吸附、TPD等)进一步研究非晶态合金催化剂的表面结构、表面电子态和催化性能之间的关系，探索电子效应和几何效应对催化剂活性中心结构的影响，探索非晶态合金的晶化失活和载体对非晶态结构的稳定化作用，以及修饰剂对催化性能的改善作用等。

The results show that a few cavitations distribute randomly and isolatedly in the gauge length in Mg-8.42Li alloy at 573 K and 1.67×103 s1. The transgranular fracture appears at 573 K and 5×104 s1 in Mg-8.42Li alloy and dimple fracture along grain boundary appears at 573 K and 1.67×103 s1 in Mg-7.83Li alloy.

结果表明：Mg-7.83Li和Mg-8.42Li合金分别获得850%和920%的最大超塑性；Mg-7.83Li合金在573 K时发生了显著的超塑性晶粒长大；在573 K和1.67×103 s1条件下制备的Mg-8.42Li合金中的空洞较少，且在变形区中随机而孤立地分布。

Combined with the observation of the metallograph and analysis of the change of chemical composition of alloys,we can draw the following conclusion:the addition of within the range of 40% once-used cobalt-chromium alloy to casting cobalt-chromium alloy wouldn't affect the quality of restorations,excessive addition of once-used alloy would damaged the microstructure and physical properties.

摘 要：通过比较不同比例的新旧钴铬合金铸造后的抗拉强度、屈服强度、延伸率、硬度等机械性能指标，并结合相应的金相观察及化学成份分析，得出结论：铸造钴铬合金中可加入不超过40％的仅铸造过一次的旧料而不影响合金的主要机械性能，超过这一比例，将影响修复体的质量。

Monel alloy, copper-chromium alloy additives can also be other alloy materials processing .

蒙乃尔合金，铜铬合金添加剂等，也可以来料加工其他合金材料。

The results show that, Au-19.25Ag-12.80Ge brazing alloy is better, its melting temperature range is 446.76494.40 ℃, and the temperature interval between the solidus and the liquidus is 47.64 ℃. When the brazing temperature is in the range of 510550 ℃, the alloy has a good spreadability and wettability with Ni. Interface structure observation reveals that there is one continuous intermetallic layer between the brazing alloy and the base metal Ni when welding. X-ray energy spectrum analysis results show that the intermetallic layer is Ge3Ni5, and because of its brittleness, the overthick intermetallic layer will decrease the shear strength of the welding joint, therefore, the welding technology should be controlled so as to gain an ideal welding interface structure.

研究结果表明：Au-19.25Ag-12.80Ge合金的性能较好，其熔化温度范围为446.76~494.40 ℃，结晶温度区间为47.64 ℃；焊接温度在510~550 ℃范围内时，Au-19.25Ag-12.80Ge钎料合金与Ni基体具有良好的铺展性和润湿性，焊接时钎料合金与Ni基体之间形成了一条连续的金属间化合物层，能谱分析表明该金属间化合物层为Ge3Ni5，由于该化合物较脆，过厚的金属间化合物层使焊接接头的剪切强度下降，故应适当控制焊接工艺以获得理想的焊接界面组织。

Through the analysis of the alloy electroplating solution in gradients, the process variables and their relationship between content of manganese in the alloy coating, the optimum process has been obtained, the additive to improve the cathode current efficiency was found; it was found that the deposits with a manganese content 40～60% exhibit excellent corrosion resistance; the corrosion resistance of zinc-manganese alloy coating will be even better after"phosphated"and passivated.

研究发现Na〓SeO〓能显著提高锌锰合金电沉积电流效率。首次用循环伏安法、恒电势电解法、恒电流阶跃法研究了Na〓SeO〓提高电流效率的作用机理。研究发现Na〓SeO〓在锌锰共沉积的条件下在阴极是分两步还原，即：首先在-0.9V处被还原为单质硒，然后在-1.25V处被还原为多硒阴离子。证明了多硒和多硒阴离子都在阴极存在特性吸附

It is possible to produce low-titanium aluminum alloy directly. Three months of periods of industrial test for production low-titanium aluminum alloy was conducted using the 80kA prebake electrolysis cells. The test results showed that the electrolysis cell can work stably, and the effect of TiO2 added into electrolyte on electrolytic process parameters, current efficiency, consumes of materials and energyare trifling. The titanium content in alloys is stable and the absorbility of Ti is high. The microstructure of electrolytic low-titanium aluminum alloy is homogeneous. The grain refinement effect is excellent comparing with that of alloys added titanium by melting Al-Ti master alloys and both alloys have the same grain refinement trend.

在80KA中型预焙电解槽上进行了为期三个月的低钛铝合金的工业试验，结果表明，电解槽工作状态稳定，TiO_2的加入对电解槽的主要工艺参数、电流效率、物料和能源消耗影响不大，合金的钛含量稳定，钛的吸收率高；所生产的电解低钛铝基合金的微观组织均匀，晶粒细化效果好，与熔配加钛的细化规律相同。

La-Mg-Ni system La0.83Mg0.17Ni Mn0.1 (x=3.4, 3.6) hydrogen storage, alloy electrode has been explored. Different time annealing treatment at 1173K has been applied to the alloy. XRD and Rietveld refinement method and Scanning Electron Microscopy analysis showed that the alloy annealed at 1173K for 8h singler type A2B7 and A5B19 phase composition can be obtained.

以La-Mg-Ni系La0.83Mg0.17NiMn0.1(x=3.4， 3.6)为研究对象，合金在1173K进行不同时间退火处理，通过XRD及Rietveld全谱拟合方法和扫描电镜背散射分析表明，在1173K退火8h分别可得到较单一的A2B7与A5B19型相结构合金。

No, it's unnecessary. I don't think I have a fever.

不，没有必要，我想我没有发烧。

We live in a culture of instant gratification.

我们生活在即时满足的文化中。