VC-WC-Fe基表面复合材料的显微组织研究

应用SEM和XRD研究了原位生成VC陶瓷颗粒及外加WC陶瓷颗粒增强Fe基表面复合材料的显微组织。结果表明，VC和WC能根据各自的含量相互固溶，这对增强相与基体的结合强度会产生有益的影响，将能明显提高表面层的抗冲击性和耐磨性。     

Research of novel oscillating wire feeding system using the AC servo motor

With the background of the control of additional mechanical force droplet transfer in MIG/MAG welding, regarding the AC servo motor as core, a novel oscillating wire feeding system has been developed with excellent performances of control and dynamic acceleration which is tested. System constitution and operation principle are introduced in this paper. Influences of parameters on dynamic acceleration performance are analyzed and discussed emphatically, such as oscillating frequency, oscillating amplitude and draw-back speed. Experimental result indicates that according to the technique of welding control, the novel wire feeding system responds rapidly to various kinds of control orders of wire feeding and draw-back, and realizes flexible control of welding wire axial movement, including dynamic shifting ,oscillating and so on.     

直列六缸柴油机曲轴平衡性分析

在外部平衡性良好的曲轴上加装平衡重,通常是为了减小曲轴所受弯矩,但是平衡重的安装将影响主轴承载荷的大小和分布,平衡重的施加还影响曲轴的内弯矩.本文分别采用了对曲柄臂施加四平衡重和八平衡重两种平衡方案进行对比.     

一种快速测定矿粉中金属含量的方法与装置

简述了一种可快速测定矿粉中金属含量的方法与装置，讨论了该装置的检测原理、设计方案及性能特点。利用该装置可实时测定出矿粉中的金属含量，在工业应用中替代繁琐的理化检验，具有较高的实用价值。     

平果铝氧化铝系统试生产和性能考核简况

对平果铝氧化铝工程试生产和引进设备性能考核情况进行了介绍，总结，并对存在问题进行了分析。     

捷克锻造技术的发展概况

本文介绍捷克在锻压技术方面的发展情况,主要叙述科研机构与研究开发的业务范围、生产厂家与生产的主要设备以及今后的发展目标。     

热浸镀铝钢材的抗高温氧化性能

将经热浸镀铝处理后的A3钢,在相同条件下与1Cr18Ni9Ti奥氏体不锈钢进行了高温抗氧化性能对比试验,结果表明.A3钢经热浸镀铝后,其抗高温氧化性能可与1Cr18Ni9Ti不锈钢相比     

Fabrication and structure characterization of ITO transparent conducting film by sol-gel technique

Using In（NO3）3·5H2O and acetylacetone as raw materials and anhydrous SnCl4 as dopant, the transparent conducting indium tin oxide（ITO） films were prepared by sol-gel and dip-coating technique. The phase transformation, structure properties and physical properties （sheet resistance and transmittance） of the films were investigated by DTA-TG, XRD, SEM, four-probe method and UV-Vis spectrometry. The results indicate that it is feasible to fabricate 1TO films on the quartz substrates by sol-gel technique, and the ITO films are formed by accumulating of particles with the size of several decades of nanometers. The prepared ITO film has cubic bixbyite structure, and （111） is its preferred plane. After five-times dip-coating, the 1TO film has a thickness less than 150 nm, a sheet resistance of 110Ω/□, a resistivity of 1.65×10^-3Ω· cm and a transparency of 90% .     

立式液压机械的故障分析与改进措施

分析了采用单向顺序阀、液控单向阀的平衡回路的液压机械，在生产中所产生的故障原因，提出了相应的解决措施。总结了排除故障的经验。对相应的工程技术人员具有一定的参考价值。     

巧用PC的移位寄存器

在PC的程序设计中，有时巧妙地使用移位寄存器，可以实现一些特殊功能，既减化了程序，又能使PC的功能和容量得到充分的利用。下面介绍几个实例：1．利用移位寄存器实现单按钮的起动和停止，可以扩展输入点数（图1）。图1移位在寄存器实现单按钮起动／停止在图1中．按钮接在X400端（F，型PC机）。当按钮第一次按下时，X400同时起动移位寄存器的数据输入和移位输入，M200被置“！”．并马上移位到M20！使M20为“l”态，M20！的常开接点闭合，使Y430有输出（设备起动）。当第二次按下按钮时，X400第二次闭合．由于M20常用接点封锁了第…