硅元素对TiN薄膜性能的影响

在TiN中加人不固溶于TiN晶格的Si元素，提高薄膜的硬度、韧性和弹性回复，从而增加了刀模具的使用寿命。     

350MW机组锅炉制粉系统调整分析

对华能大连电厂350MW机组4号锅炉MPS磨煤机在运行中存在的磨煤机振动、石子煤量较大、煤粉较粗、锅炉个别燃烧器出现脱火等问题进行分析，并通过试验对制粉系统进行优化，使磨煤机存在的问题得到有效解决，调整后的锅炉效率与性能考核时相比提高了0．98个百分点，结论及建议对锅炉运行和检修具有一定的指导作用。     

人工智能技术在电阻点焊过程控制中的应用与发展

综述了人工智能技术(人工神经网络、模糊控制、专家系统技术、智能主体等)在电阻点焊工艺参数设计、点焊过程控制、质量预测与评判等领域的应用特点,分析了人工智能技术在解决非线性、病态求解问题中的优势,并指出多种智能技术的集成已经成为人工智能技术在电阻点焊过程控制中应用的趋势。     

汽轮机排汽湿度的在线监测方法及工业试验研究

蒸汽湿度对汽轮机的安全性和经济性有重要的影响.该文提出了可以在线监测汽轮机排汽湿度的双区加热方法,将加热段分为蒸发段和过热段,各段独立加热,通过过热段测量蒸汽流量,简化了测量装置,提高了探针的可靠性.湿度测量探针设计中仔细考虑了散热损失、汽化长度、热阻力的影响,提高了测量精度,实现了对汽轮机排汽湿度的长期在线监测.对采用双区加热法研制的湿度测量探针进行了工业试验,试验结果表明测量结果是可信的.     

基于LoRa技术的矿用无线复合传感器设计与实现

随着无线传感器网络技术的发展,设备状态无线监测系统越来越得到重视。针对现有的矿用无线传感器终端存在功耗高、通信距离短、射频信号抗干扰能力差等问题,提出了基于LoRa技术的矿用无线复合传感器的设计方案,详细论述了传感单元、主控单元、射频单元等硬件模块的选型与设计,以及振动数据采集、温度数据采集、数据发送等软件模块,给出了各软件模块的程序流程图。搭建了测试系统,开展了设计的无线复合传感器的功耗、无传输距离和数据有效性等性能测试。测试结果表明,设计的无线复合传感器功耗低,丢包率小于10%时无线传输距离优于600米,采集的数据真实有效。研究成果为矿用设备状态无线监测系统提供了技术支持。     

改善电能质量的电网补偿技术

概要介绍了电力系统中为提高电能质量所使用的各种补偿技术及动态补偿方式，重点叙述了补偿技术的发展及其技术前景，讨论了正在开展的新的补偿技术以及补偿用能源的合理使用，并表明了对当前电网中应用各种补偿方式的看法和评价。     

Study on the effect of welding current during laser beam-resistance seam welding of aluminum alloy 5052

The effect of welding current on the weld shape and tensile shear load during laser beam-resistance seam welding (LB-RSW) of aluminum alloy 5052 is studied. Experimental results show that the penetration depth, weld width,tensile shear load and the ratio of penetration depth to weld width of LB-RSW are bigger than those of laser beam welding(LBW) under the same conditions and the former three parameters increase as welding current rises. The weld shape of LB-RSW below 5 kA welding current is nearly the same as that of LBW. The weld morphology is protuberant under the condition of 5 kA welding current and 0.8 m/min welding speed. Furthermore, the microstructure of the weld seam of LB-RSW is coarser than that of LBW.     

Study of diffusion bonding of Ti-6Al-4V and ZQSn10-10 with metal interlayer

The diffusion bonding was carried out to join Ti alloy (Ti-6Al-4V) and tin-bronze (ZQSn10-10) with Ni and Ni Cu interlayer. The microstructures of the diffusion bonded joints were analyzed by scanning electron microscope (SEM), energy dispersive spectroscopy (EDS) and X-ray diffraction (XRD). The results show that when the interlayer is Ni or Ni Cu transition metals both could effectively prevent the diffusion between Ti and Cu and avoid the formation of the Cu-Ti intermetallic compounds (Cu3Ti, CuTi etc.). But the Ni-Ti intermetallic compounds (NiTi, Ni3Ti) are formed on the Ti-6Al-4V/Ni interface. When the interlayer is Ni, the optimum bonding parameters are 830℃/10 MPa/30min. And when the interlayer is Ni Cu, the optimum bonding parameters are 850℃/10MPa/20min. With the optimum bonding parameters, the tensile strength of the joints with Ni and Ni Cu interlayer both are 155.8MPa, which is 65 percent of the strength of ZQSn10-10 base metal.