粉末冶金

The wettabilities of CuSn alloy and Fe are so high that accelerate the alloying process of sintering so as to improve greatly the strength,hardness and notch toug...

其中当Fe增加到15%时，冲击韧性达20.6 J/cm2，抗拉伸强度为163.2 MPa，布氏硬度为53.8，达到和超过了TB/T1842.1-2002电力机车粉末冶金滑板铁道行业标准，为高速列车受电弓滑板提供了新的材料。

Due to the unorderly microstructure and the tin oxide assemble in matrix, the electric conductivity of composite fabricated by powder metallurgy became lower than that composite fabricated by reactive synthesis.

粉末冶金法制备的材料由于其杂乱的组织结构以及氧化锡的团聚而使材料的导电性较差。

At the same time run the powder metallurgy machinery industry \ Bimetal bearings and bushings for sale.

同时兼营机械行业的粉末冶金制品＼轴承及双金属复合衬套销售。

Using modified conventional powder metallurgy process for sintered Nd-Fe-B magnets , including annealing of ingot alloy, hydrogen decrepitating, modified jet mill and adding additive during jet milling, we have mass-produced high performance and high corrosion resistance sintered Nd-Fe-B magnets from a conventional ingot alloy without strict protections against oxidation.

利用改进的传统粉末冶金工艺(铸锭热处理、氢爆、改进型气流磨设备以及在气流磨中掺入添加剂等)，在无严格的防氧保护情况下，从传统合金铸锭出发，工业化生产出具有高耐蚀性的N48～50档烧结Nd-Fe-B 磁体。

In order to improve the conductivity and abrasive resistance of copper-graphite composite brush,influence of carbon fiber content on the electrical wear behaviors of the copper-graphite brush were investigated under two conditions of electrifying and non-electrifying.

结果表明，在试验条件下，在合金接触线-黄铜粉末冶金滑块系统的电磨损过程中，Cu-Cr-Zr合金接触线的电磨损率随电流强度升高显著加强，由加载较小电流引起的磨损份额为0。

Al-Ti, Al-Fe, Al-SiCp(130nm), Al-SiCp(14 m) composites are performed with cold-press sintering plus hot extrusion powder metallurgy technique in this article, microstructure, hardness, extensibility behavior and traction-wear behavior are studied ,some innovative outcome is got.

本文采用&冷压烧结+热挤压&的粉末冶金方法制备出Al-Ti、Al-Fe、Al-SiCp(130nm)、Al-SiCp(14μm)复合材料，研究了显微组织、致密度、硬度、抗拉行为以及耐磨行为，取得了一些创新成果。

The microstructure and properties of copper-graphite and Cu/Copper-coated graphite composites have been compared to those prepared by powder metallurgy.

比较了用粉末冶金法制备的铜-镀铜石墨复合材料的显微组织与部分性能。

Powder metallurgy ; Cu/Copper-coated graphite composite ; structure and properties

粉末冶金；铜-镀铜石墨复合材料；组织与性能

The copper-coated graphite/silver matrix composites have been made by the method of powder metallurgy. The properties of the composites, such as volume density, resistivity, hardness, bending strength and tribological behavior were tested, and comparison was made with silver-graphite composite of the same content graphite.

将镀铜石墨粉与银粉用粉末冶金法制备成镀铜石墨－银基复合材料，对其密度、电阻率、硬度、抗弯强度和摩擦磨损性能进行测试，并与相同石墨含量的银－石墨复合材料进行对比。

The upsetting test of metal powder sintered preform by blow speed of the hydraulic press,crank press,pneumatic hammer and high energy rate forging hammer was reported.

研究了用液压机、曲柄压力机、空气锤及高速锤的打击速度对粉末冶金烧结体进行的镦粗试验。

On the other hand, the more important thing is because the urban housing is a kind of heterogeneity products.

另一方面，更重要的是由于城市住房是一种异质性产品。

Climate histogram is the fall that collects place measure calm value, cent serves as cross axle for a few equal interval, the area that the frequency that the value appears according to place is accumulated and becomes will be determined inside each interval, discharge the graph that rise with post, also be called histogram.

气候直方图是将所收集的降水量测定值，分为几个相等的区间作为横轴，并将各区间内所测定值依所出现的次数累积而成的面积，用柱子排起来的图形，也叫做柱状图。