焦化废水处理全面达标的试验与探讨

针对宝钢焦化废水经A－O工艺处理后，COD、F、T－CN、色度超标问题进行工艺改进和化学处理法试验，结果用A－O－O法处理焦化废水，再加上化学处理使宝钢焦化废水全面达标。     

一种普通冲床的数控改造

本文针对J94A－4型普通冲床的工作特点,提出了应用单片机技术进行数控改造的设计方案,介绍了数控系统的硬件构成和软件设计。     

斜端面特种起重轨的窄间隙电弧焊

介绍了采用窄间隙电弧焊方法焊接斜端面、特种轨型起重轨的方法。焊接分两个阶段进行：第1阶段焊接轨底部分，采用φ4mm焊条，焊接电流140－160A，每道焊完进行清渣；第2阶段焊接轨腰和轨头部分，采用φ5mm焊条，焊接电流180－200A。轨腰和轨头部分焊接连续进行，每层焊道之间不进行除渣。焊接接头经过实际应用，情况良好。     

结构用Ti—6Al—2Sn—2Zr—2Cr—2Mo—Si钛合金的热机械加工和热处理

Ti－6A1－2Sn－2Zr－2Cr－2Mo－Si（Ti－6－22－22S）是由喷气发动机公司（RMI）研制的一种α-β合金，旨在使截面尺寸为100mm的工件获得高强度、良好的断裂韧性／强度、高于Ti-6A1－4V的弹性模量和相对较好的中温蠕变性能．为了达到上述目标，合金设计是在Ti－6A1的基础上，添加β同晶型元素钼和β共析元素铬和硅，以及中性元素锡和锆．通过适当平衡这些合金元素使。一厂合金达到所要求的性能．原始合金中硅的名义成分为0．23Wt％，进行。－p加工和。一产热处理后，可使拉伸性能最佳化．该合金现在可以以量标准的加工产品形式进行…     

翼片水浸超声探伤

探索了水浸超声波在检测特殊形状5A06－O（LF6－M）3．0mm炮弹翼片质量中的应用。通过数据分析得出了探测波形的种类及检测方法,制定了验收的标准．经实际应用,确保了翼片的质量和安全使用,减少了经济损失,保证了供货期,同时也验证了检测方法的可行性,为特殊形状薄板内部质量的控制提供了较科学的依据。     

台式多功能声显微镜的研制

研制成功了一台THSAM－M型台式多功能声显微镜,在PC机内插入采样速率为10^9次／s的超高速A／D卡以及快脉冲产生和接收卡,利用软件完成信号检测和显示功能,仪器工作频率为1－100MHz;在检测样品时,可同时显示A,B,C扫描结果,并可观察样品的多样层B,C扫描图象,还可显示样品的内部三维结构,该系统已成功应用于多个领域的样品测量,获得了一定效果。该机体积小,功能强、成成本 较低,具有广阔的应用前景。     

含Pb、As、Sn D型石墨铸铁抗氧化性能的研究

利用含Pb、As、Sn地方生铁制取D型石墨铸铁并测定了这种铸铁的抗氧化性能。结果表明：这种含Pb、As、Sn D型石墨铸铁的抗氧化性能明显优于A型石墨铸铁。在600℃时，其抗氧化性能比A型石墨铸铁提高了56％－64％；在900℃时，其抗氧化性能也比A型石墨铸铁提高了约5％－27％。     

提高2A12—O铝合金型材伸长率的工艺研究

对不同时期生产的2A12－O铝合金进行对比，找出了影响近期的生产的2A12－O铝合金型材伸长率的因素，进行了调整工艺试验，确定了提高型材伸长率的途径。     

机具、配件及材料

襄樊斯普瑞电力电子有限公司 主要产品：UDS三相整流桥系列（200－600A，适用于CO2气保焊机）；UDQ单相整流桥系列（40－600A，适用于焊机和充电器）；     

8011A—O铝合金10—13μm箔材生产工艺研究

介绍了8011A－O铝合金10－13μm箔的试制工艺方案，根据试验结果制定了生产工艺制度。     

Influence of Fe on Microstructure and Mechanical Properties in Pdoped Ni–Cr–Fe Alloys

The influence of Fe on the microstructure and mechanical properties of P-doped Ni–Cr–Fe alloys has been investigated.Results showed that increasing Fe content refined the dendrite microstructure and enhanced the solubility of P in as-cast alloys. The change of microhardness in different dendrite regions was attributed to the segregation of P atoms in solid solution state, which had strengthening effects. Increasing Fe contents from 15.2 to 60.7 wt% reduced the yield strength and tensile strength but had little influence on the elongation of alloys. The stress rupture life of alloys after heat treatment decreased with the increment of Fe contents, and the failure fracture modes transferred from transgranular to intergranular fracture mode. The change of fracture modes was due to the weakness of grain boundaries caused by the increment of Fe.In addition, the precipitation of M_(23)C_6 was believed to be related to the segregation of P toward grain boundaries, which led to the fluctuation of carbon and chromium atoms near the grain boundaries in alloys with low Fe contents. Consequently, the increment of Fe decreased the strength of matrix and changed the existence of P atoms and the precipitates at grain boundaries.     

Antimony Induced Crystallization of Amorphous Silicon

Antimony induced crystallization of PVD (physics vapor deposition) amorphous silicon can be observed on sapphire substrates. Very large crystalline regions up to several tens of micrometers can be formed. The Si diffraction patterns of the area of crystallization can be observed with TEM (transmission electron microscopy). Only a few and much smaller crystals of the order of 1μm were formed when the antimony layer was deposited by MBE (molecular beam epitaxy) compared with a layer formed by thermal evaporation. The use of high vacuum is essential in order to observe any Sb induced crystallization at all. In addition it is necessary to take measures to limit the evaporation of the antimony.     

Effects of Sub-zero Celsius Treatment and Tempering on the Stability of Retained Austenite in Bearing Steel

In this work, the influence of sub-zero Celsius treatment and tempering on the mechanical and thermal stability of retained austenite in bearing steel were assessed by tensile test and DSC. Compared with traditional quenched and tempered treatment, sub-zero Celsius treatment obviously decreases the volume fraction of retained austenite. Moreover, the mechanical stability of retained austenite was enhanced due to the accumulation of compressive stresses in retained austenite after sub-zero Celsius treatment and tempering. Meanwhile, the morphology of retained austenite changed from film-like to blocky with austenitization temperature increasing, and the mechanical stability of film-like retained austenite is higher than that of blocky one. The DSC results showed that the activation energy of retained austenite decomposition slightly increased through sub-zero Celsius treatment and tempering. This result may probably be ascribed to partitioning of carbon during tempering. However, the temperature at which retained austenite starts to decompose is unchanged.     

The First Phase of the SRIF Industrialized Base in ＂West Area＂ Has Been Put into Operation

After nearly two years＇ tense construction, the first phase of industrialized base of Shenyang Research Institute of Foundry （SRIF）, located at the Tiexi Casting and Forging Industrial Park in the west of Tiexi District, has now been completed and formally put into operation.     

The Electrochemical Behavior of Oceanic Microbiological Influenced Corrosion on Carbon Steel

The corrosion behavior of carbon steel in the medium of marine microorganisms was investigated by electrochemical impedance spectra, polarization curves, and so on. Experimental results showed that the corrosion potential of carbon steel moved in a negative direction in the unpurified marine microorganism solution, and the polarization style of the cathodic process did not change. The electrochemical impedance spectra showed that the impedance value of the electrode decreased in the medium with bacteria, which indicated that the existence of microorganism could accelerate the corrosion progress of carbon steel.     

Ultrasonic welding of polyamide sealing gaskets using infrared radiation

A method of ultrasonic welding polyamide sealing gaskets using infrared radiation is developed. A method of thermal ultrasonic butt welding of polyamides which increases the strength, quality and endurance of the welded joints is described. The results of mechanical and service tests of the welded joints in polyamide are presented.     

FINITE ELEMENT NUMERICAL SIMULATION OF TEMPERATURE FIELD IN METAL PATTERN CASTING SYSTEM AND ＂REVERSE METHOD＂ OF DEFINING THE THERMAL PHYSICAL COEFFICIENT

With the technology support of virtual reality and ANSYS software, an example on the simulation of temperature distribution of casting system during the solidification process was provided, which took the latent heat of phase change, the conditions for convection, and the interface heat transfer coefficient into consideration. The result of ANSYS was found to agree well with the test data. This research offers an unorthodox way or "reverse method" of defining the relevant thermal physical coefficient.     

Effects of Tungsten and Boron Contents on Crystallization Temperature and Microhardness of Tungsten Based Metallic Glasses

Effects of tungsten and boron contents on the thermal properties and microhardness of W-Fe-B metallic glass system were studied. Thin foils, with thicknesses of 20 and 100 μm, of the alloys were produced by piston and anvil method in an arc furnace. The structures of the foils were investigated by X-ray diffraction. Thermal stabilities of the alloys were examined by using differential scanning calorimetry. 20-μm- thick foils of all the alloys were determined to be fully amorphous, but crystalline phases were detected in the 100-μm-thick foils. It was found that crystallization temperatures of the alloys are between 1060 and 1177 K. Tungsten and boron content increases improve the crystallization temperature and microhardness of the alloys significantly, but deteriorate the glass forming ability of the alloys. It was also observed that for constant Fe content, increasing tungsten content to the level higher than that of boron content does not result in any further improvement in crystallization temperature, but improves glass forming ability significantly. The alloy containing highest total amount of tungsten and boron, W₃₅Fe₃₅B₃₀, has the highest crystallization temperature, 1177 K, and microhardness, 1634 HV.     

Microstructure Evolution and Mechanical Hardening of Hypereutectoid Pearlitic Steel During Cold Rolling

The microstructure evolution of different cold rolling reductions (from 0 to 81.6%) was studied by SEM (scanning electron microscopy) and TEM (transmission electron microscope). The study showed that the orientation multiplicity of pearlitic lamellas resulted in inhomogeneous deformation of different pearlitic lamellas, and with the increase of reduction, the microstructure underwent a course of "homogeneity → inhomogeneity → homogeneity". The result of XRD (X-ray diffraction) analysis indicated that cementite did not decompose and dissolve into ferrite; the results of the mechanical property test suggested that the relationship between Rp0.2 (yield strength) and ε (true strain) was in good agreement with Hollomon relationship. With the equation Rp0.2 = 1465ε0.18, the yield strength of the steel in different reductions could be well predicted.     

微生物生物膜下的钢铁材料腐蚀研究进展

综述了近年来有关SRB引起的钢铁腐蚀研究进展,分析了SRB生物膜的形成机制,介绍了传统SRB腐蚀机理、生物催化硫酸盐还原阴极反应腐蚀机理,以及SRB诱导生物矿化作用形成的沉淀垢膜下的碳钢腐蚀研究现状,着重介绍了生物能量学和生物电化学在推动SRB导致的微生物腐蚀机理研究中的重要作用,并在此基础上介绍了目前最新的对生物膜下SRB的控制技术和方法,为SRB腐蚀及控制提供参考。