直齿圆锥齿轮精锻模电极齿轮的化铣修形技术

研究了化学铣切方法在直齿圆锥齿轮精锻模电极齿轮的齿顶修边、齿宽鼓形加工和降低表面粗糙度等方面应用的技术，应用该技术可提高精锻齿轮精度1～2级。     

注射模CAE远程应用系统的研究与实现

研究了注射模CAE远程应用系统的实现方法。围绕建立最优系统模型 ,探讨了数据压缩算法和FTP文件服务 ,并采用主从服务器分离法提高系统性能。为进一步优化系统 ,运用了多线程、套接字、ADO和RAS远程拨号等技术。     

Effect of trace rare earth element Er on high pure Al

1　INTRODUCTIONAsit swellknown ,Chinaisrichinrareearths ,whoseprovedreservesare 80 %ofthetotalreservesoftheworld ,rankingfirstintheworld .Atpresent,theresearchandapplicationofREinsteel&ironareratherprofoundinChina .ThoughtheapplicationandstudiesaboutREinaluminumanditsalloysbeganearly ,it snotuntillateinthe 1970 sthattheinvesti gationandexploitationbeganonalargescaleandgraduallycametoaclimax[13] .Inthepast ,there searchofREaluminummainlyfocusedontheapplica tionofsomeelementssuchasLa ,…     

Simulation of local effect of reinforcement on temperature field during solidification of aluminum metal matrix composite

The effect of reinforcement on the solidification of pure metal matrix composites （MMCs） was simulated using a two-dimensional solidification temperature field model by the finite element method. The concept of the character length was proposed to describe the size of reinforcement local heat influential zone in MMCs solidification according to the change of the morphologies of solid-liquid interface. The relationship between the character length and the geometrical conditions, the boundary condition and physical properties of the reinforcement were studied, respectively. The results show that the width of the unit and the cold boundary temperature have no effect on the character lengths but have effect on the distance between cold boundary and reinforcement （/） and the thermal parameters of the reinforcement. An experimental rule to predict the value of the character length was derived and applied.     

Electroless deposition of Ni on template of halloysite and its magnetic property

Halloysite template, a ceramic substrate, is of a hollow cylindric structure, on which the fine Pd nanoparticles are uniformly formed by the reduction of palldate chloride to initiate electroless deposition. The electroless deposition of Ni is catalyzed by the Pd particles, which results in a uniform layer of Ni-P alloy on halloysite. The alloy is of a nanocrystalline structure, of which the average diameter is about 6 nm. After being heat-treated at 400 ℃, it contains both Ni and Ni12P5 crystal, meanwhile, the Ni crystal gets larger with an average size of 51.9 nm.The content of phosphorous in the Ni layer has a great influence on crystal structure. The metallized halloysite has a higher inherent coercive force, and a much lower saturation magnetization in its as-plated state, while after heattreatment, the inherent coercive force decreases drastically. These magnetic properties have great relationship with the superparamagnetism of Ni nanocrystalline and the stress anisotropy in Ni layer.     

机械合金化Ag-30Cr合金在0.1 Mpa纯氧气中的氧化

采用机械合金化方法制备了Cr含量为30％(质量分数)的两相颗粒极细的Ag—Cr合金，在700℃，800℃及0．1MPa纯氧气中氧化时，机械合金化Ag-30Cr合金外层为Ag层，其下方为复合氧化物AgCrO2，最内层为连续的Cr2O3，这一结构不同于粗晶粒粉末冶金Ag—Cr合金的复杂的混合氧化膜。这主要是由于晶粒的细化加快了Cr颗粒的溶解，加速了Cr从合金到膜的扩散，从而有效地促进Cr2O3层的形成。     

半固态铸造技术研究现状与展望

半固态铸造是一种新的材料成形技术，综述了半固态铸造合金的组织变化、坯料制备、充型过程数值模拟和应用等方面的研究成果，同时对我国发展半固态铸造技术提出了若干值得重视的问题。     

太阳能电池自动封装系统的研究

为了保证太阳能电池在恶劣的太空环境下能可靠运行，在太阳能电池布贴前，必须进行抗辐照玻璃盖片的封装操作，以达到保护太阳能电池的目的。抗辐照特性是空间太阳能电池区别于地面应用的太阳能电池的重要特征之一。抗辐照玻璃盖片的封装操作是空间太阳能电池方阵制造过程的重要环节。本文通过机器人技术与滴胶技术的结合，设计出一套太阳能电池自动封装系统，实现太阳能电池片的高精度定量喷涂和抗辐照玻璃盖片的非真空环境下的精确封装。文章详细介绍了设计要求、设计思想、系统组成、工作原理和实现过程，并分析了系统的技术特点。     

离心铸造CrMoWVNb白口铸铁轧辊的研究

应用离心铸造方法：以Cr,Mo,V,Nb为主要合金元素，研制成功了CrMoWVNb白口铸铁轧辊，分析了合金元素在轧辊中的作用，指出在轧辊中加入适量稀土和钛可细化轧辊组织，改善轧辊性能，同时还分析了轧辊生产中裂纹产生的原因，提出了消除裂纹的措施，并应用于高速线材轧机预精轧机架，使用寿命达到高镍铬无限冷硬铁轧辊的4－5倍。     

基于PMAC的数控系统控制性能的研究

研究了基于PMAC多轴数控系统的极限特性和动态特性及PID参数调节，并通过实验对参数变化在控制系统中的影响作了初步研究。