近年来马钢一烧球团生产的技术进步及效果

马钢一烧竖炉球团系统投产后，通过设备改造和技术创新，包括优化配料方案、增设润磨工艺、探索热工参数，设计新型烘干炉、改造竖炉炉型等，并对生产设备采用计算机系统控制及数据信息自动采集处理，竖炉作业率、利用系数，球团矿产量、合格率，膨润土单耗等多项指标达全国先进水平。     

T122耐热钢平衡相转变的热力学计算和分析

采用Thermc-Calc热力学计算软件，对820～1200℃时T122高铬耐热钢（％：0．11～0．12C，11．37～11．97Cr，1．90～1．93W，0．38Mo，0．86～0．90Cu，0．05Nb，0．19～0．20V，0．58～0．67N，0，0023～0．0028B）在820～1200℃的热力学平衡相及合金元素Cr、Al、Ti对6铁素体和主要析出相的影响进行了研究。结果表明，T122耐热钢残留有较多的6铁素体，其主要析出相为M23C6、Laves和MX。在950～1050℃时6铁素体最少，其含量为15．7％～18．9％。M23C6析出开始温度为940℃，Laves相为750℃，MX则较稳定为〉1250℃。Cr对δ铁素体含量影响很大，但对析出相影响较小。降低Al、Ti有助于降低δ铁素体含量，增加MX含量。     

C194铜合金的强化机制研究

为了研究C194铜合金的强化机制，对比分析了两种成分略有不同的C194铜合金带材的力学性能及其微观组织。研究发现C194合金组织中的析出相包括α—Fe和Fe3P两种，其中α—Fe是C194铜合金的主要强化相，而不是Fe3P。如果合金中P含量较高，则多余的P与合金元素Fe结合形成金属间化合物Fe3P，并以粗大颗粒形式析出，这将导致起主要强化作用的α-Fe相数量减少，从而使材料强度降低，同时由于P对合金的导电、导热性能均有显著影响，对材料综合性能不利，因此在生产中应严格控制P的含量，且尽量取下限，抑制Fe3P的形成和析出，促进α-Fe在时效过程的弥散析出，从而达到理想的强化效果。     

皮江法炼镁技术的缺陷及改进途径

概略介绍了镁的优良性能、应用前景及皮江法在中国的应用前景,最后主要介绍了目前皮江法炼镁技术存在的缺陷,同时对改进途径进行了探讨。     

A Virtual System for Vision Based SPC

A virtual system for vision based SPC (Statistical Process Control) is explored and constructed in this article for the purpose of the preliminary tests. Its performance is compared with that of a real vision system in a case study. The similarity between the virtual and real systems is examined with a chi-square test and an X chart experiment. The results suggest that the virtual system can be used to replace the real system in the preliminary test. The virtual system has many advantages, such as low cost, easy setup, wide adaptability, and being heuristic in nature. The use of the virtual system may help promote the applications of vision system to SPC.     

MINI-MPM连轧无缝管机组主要设备机械特征分析

对国内两套MINI-MPM连轧管机组(Φ159mm和Φ180mm)的结构(连轧管机、再加热炉、穿孔机、定径机及换辊机构等)和性能特点进行了分析比较,指出了各自的特点,可供新建MINI-MPM连轧管机组时参考.     

Fracture criterion for kinking cracks in a tri-material adhesively bonded joint under mixed mode loading

The fracture behavior of a composite/adhesive/steel bonded joint was investigated by using double cantilever beam specimens. A starter crack is embedded at the steel/adhesive interface by inserting Teflon tape. The composite adherend is a random carbon fiber reinforced vinyl ester resin composite while the other adherend is cold rolled steel. The adhesive is a one-part epoxy that is heat cured. The Fernlund-Spelt mixed mode loading fixture was employed to generate five different mode mixities. Due to the dissimilar adherends, crack turning into the adhesive (or crack kinking) associated with joint failure, was observed. The bulk fracture toughness of the adhesive was measured separately by using standard compact tension specimens. The strain energy release rates for kinking cracks at the critical loads were calculated by a commercial finite element analysis software ABAQUS in conjunction with the virtual crack closure technique. Two fracture criteria related to strain energy release rates were examined. These are (1) maximum energy release rate criterion (G_max) and, (2) mode I facture criterion (G_II = 0). They are shown to be equivalent in this study. That is, crack kinking takes place at the angle close to maximum G or G_I (also minimum G_II, with a value that is approximately zero). The average value of G_IC obtained from bulk adhesive tests using compact tension specimens is shown to be an accurate indicator of the mode I fracture toughness of the kinking cracks within the adhesive layer. It is concluded that the crack in tri-material adhesively bonded joint tends to initiate into the adhesive along a path that promotes failure in pure mode I, locally.     

Thermal Properties Measurement of Micro-electromechanical System Sensors by Digital Moire Method

Abstract:  The thermal properties of a micro-electromechanical system sensor were analysed by a novel digital moiré method. A double-layer micro-cantilever sensor (60  μ m long, 10  μ m width and 2  μ m thick) was prepared by focused ion beam milling. A grating with frequency of 5000 lines mm⁻¹ was etched on the cantilever. The sensor was placed into a scanning electron microscope system with a high temperature device. The observation and recording of the thermal deformation of the grating were realised in real-time as the temperature rose from room temperature to 300 °C at intervals of 50 °C. Digital moiré was generated by interference of the deformed grating and a digital virtual grating. The thermal properties including strain distribution of the sensor and the linear expansion coefficient of polysilicon were accurately measured by the phase-shifted moiré patterns.     

RPR技术在教育城域网中的应用

弹性分组环(RPR)是一种新的城域网技术,它不仅保留了SDH/SONET的可靠性,而且比SDH/SONET能更有效地分配带宽和传输数据。介绍了RPR技术的特点,特别分析了其在教育城域网的应用。     

卫生检验实验室信息管理系统(H-LIMS)的开发设计

卫生检验实验室信息管理系统(H-LIMS)是一个用于卫生检验业务管理的软件系统,是针对产品检验和防病检验业务从样品受理、检验到报告编制、签发、发出的金过程进行计算机管理,对人员、设备、物料、环境、质量文件等影响检验质量的各个要素进行规范化管理.