喷射成形高速钢中残余奥氏体的X射线衍射定量分析

文章阐述了X射线残余奥氏体定量分析的基本原理.经过对马氏体相和奥氏体相的衍射线的分别标定,选定马氏体和奥氏体的一条衍射线,分别测出它们的累积强度,用残余奥氏体定量分析公式来计算残余奥氏体体积百分含量.利用X射线衍射残奥定量测定方法,对喷射成形高速钢圆坯中残余奥氏体含量进行了测定,阐明了喷射成形圆坯密度变化的原因和机理,同时还对喷射成形过程中圆坯的冷却条件对残余奥氏体量的影响进行了合理的分析.为喷射成型新材料的工艺研究,提供了一种新的测试手段.     

闪光对焊接头质量监控、判断的新方法

基于LabVIEW和Visual Bisic软件编制的高速采集和数据处理软件，把高速采集应用在闪光焊的焊接参数的采集中，得到了在50kHz采集频率下的焊接电流、焊接电压、烧化量等焊接质量参数的瞬时值；再根据在焊接过程中短路、断路、闪光时焊接电压、电流的特点，来判断焊接过程中的焊接状态，从而得到焊接过程加速阶段闪光率和低压Ⅱ阶段的闪光率；同时，通过数据处理，得到焊接总时间、焊接接头能量输入、烧化量。在此基础上，基于线性回归方法建立了焊接接头落锤质量和焊接过程特征量之间的关系方程，利用该方程．可以对接头的焊接质量进行预测和评判。     

广钢连轧厂四切分生产孔型优化

针对“四切分”生产中的关键问题——孔型，结合生产实际，提出对引进的四切分生产孔型进行优化，使孔型工艺布置更趋合理。     

干式空心限流电抗器技术特点

概述了限流电抗器的主要作用、参数的选取、结构和运行的检查维护等优势,并介绍上海MWB互感器有限公司干式空心电抗器的技术特点。     

动态冰浆蓄冷空调系统及特性

动态冰浆具有良好的热物理性和传热特性，现已应用于蓄冷空调系统和工业处理过程中。介绍冰浆的各种发生方法和装置，以及冰浆的动态特性和潜在应用领域，分析了动态冰浆蓄冷空调系统工作过程。     

影响气体质量流量计若干因素的研究

针对测量气体质量流量的特殊性，分析了气体科氏质量流量计的发展现状及存在的问题；基于气体科氏质量流计的工作机量，讨论了影响气体科氏质量流量计笥能的几种因素；给出了提高气体科氏质量流量计性能的思路与措施。初步研究表明：得到的研究结果与提出的技术措施具有较好实用效果。     

Birefringent non-polarizing thin film design

Recently, there has been an increasing interest in theoretical analysis, design anddeposition of birefringent thin films[1—4]. With the development of deposition and meas-urement technique, it is possible to prepare birefringent optical component, such as elec-tro-optic tunable filters[5], antireflection coating[6], phase compensator[7] and polarizers[8].For isotropic thin film, plane waves at oblique incidence having transverse electric (TEor s) and transverse magnetic (TM or p) fields, res…     

Studies on the microstructure,optical and electrical properties of organic microcavity devices based on a porous silicon reflector

Due to its low-cost and mature technology, Si has consistently been the mostwidely used semiconductor in microelectronic industry. Nevertheless, as the photolitho-graphic line for integrated circuit devices becomes narrower and narrower, the quantumsize effect appearing in the devices will further limit the development of electronic in-dustry. Si-based optoelectronic integration can increase the operational velocity of inte-grated circuits because photon can propagate three orders faster than …     

Characterization of Ionic Conducting Cross-linked Polyether Electrolytes

An appropriate amount of toluene 2,4-diisocyanate（TDI） was added into polyether（[（CH2CH2O）13 CH2O]n/Li salt electrolyte to form a cross-linked network,with improving the film proces sability and thermal stability.The relation between the structure and ioinc conductive properties of the cross-lined polyether electrolytes was investigated by means of Fourier transform infra-red spectroscopy（FTIR）,differential scanning calorimetry（DSC）,mechanical property and AC impedance spectroscopy.The electrolytes system is found to have two glass transitions,and it is found that the two Tgs increase with increasing salt concentration.At the some Li salt concentration,the conductivity of cross-liked polyether/LiN（CF3SO2）2 complex system is higher than that of LiClo4,At EO/Li=25：1（mol ratio）,the former conductivity changes with temperature,while the later coincids with Arrhenius formula（σ=Ae^-Ea/RT）.The cross-linked polyether/LiN（CF3 SO2）2 electrolyte exhibits the maximum σ=10^-4.75S/cm at 30℃.     

消除膨胀机系统的安全隐患

分析了膨胀机发生抱轴事故的原因,介绍了膨胀机系统存在的安全隐患,并提出了消除隐患的措施,简述了采取措施后的效果