Φ100mm自动轧管机组投坯方法的改进

分析了安阳钢铁股份有限公司无缝钢管厂Φ 100mm自动轧管机组均尺投坯生产热轧无缝钢管存在的问题,介绍了定尺投坯法的特点,比较了两种投坯方法的实施效果。实践证明,定尺投坯法是一种符合生产经营实际的投坯方法。     

Compensation Effect of Benzene Hydrogenation on Pt(111) and Pt(100) Analyzed by the Selective Energy Transfer Model

Kinetic measurements at low temperatures (310–360 K) using gas chromatography (GC) for benzene hydrogenation on Pt(100) and Pt(111) single crystal surfaces have been carried out at Torr pressures. These kinetic measurements demonstrated a linear compensation effect for the production of cyclohexane. A detailed application of the model of selective energy transfer to the experimentally obtained results yields the vibrational frequency of the adsorbate leading to reaction. This frequency is attributed to ring distortion modes. The vibrational frequency of the heat bath, or catalyst, is ascribed to a Pt-H mode. An approximate heat of adsorption of the reacting molecule is also calculated from the model.     

Corrosion of steel under the defected coating studied by localized electrochemical impedance spectroscopy

Corrosion of steel under the defected coating in near-neutral pH solution was investigated by localized electrochemical impedance spectroscopy (LEIS) measurements. The LEIS response is dependent on the size of the defect. For small defects, e.g., less than 200 μm in diameter, localized corrosion process and mechanism of steel, as indicated by the measured LEIS plots, change with time. The diffusion process dominates the interfacial corrosion reaction, which is due to the block effect of the deposited corrosion product combined with the geometrical factor of a large coating thickness/defect width ratio. In the presence of a big defect, e.g., up to 1000 μm, the LEIS responses measured at the defect are always featured by a coating impedance in the high-frequency range and an interfacial corrosion reaction in the low-frequency range. The block effect of corrosion product does not apply due to the relatively open geometry. Conventional EIS measurements on a macroscopic-coated electrode reflect the “averaged” impedance results from both coating and defect. The information of the localized electrochemical corrosion processes and mechanisms at the small defect is lost, and the coating impedance information is “averaged” out when a big defect is contained. LEIS measurement provides an essential technique to characterize microscopically the local electrochemical corrosion reaction of steel under the defected coating.     

10万m^3原油储罐罐壁板高强钢12MnNiVR的冬季焊接施工

通过对高强钢12MnNiVR焊接性能的分析,提出了高强钢冬季焊接施工带来的问题以及处理办法。得出可靠的焊前预热和焊后保温是确保10万m^3原油储罐冬季焊接施工质量的重要措施。     

X射线安检设备中双能量方式下R值的提取

R是与有效原子序数直接相关的量。根据已知物质的双能量透射图像的低、高能灰度值可以计算出R值。推证了用R值算法来获得被检物质属性，进而找出危险品的方法。     

用于MEMS中的硅基材料微观摩擦磨损性能研究

利用原子力显微镜考察了Si（100）表面的粘附、摩擦磨损性能,试验考虑了外界湿度、循环扫描次数等因素的影响,并初步提出了解决方案.结果表明：在AFM摩擦试验中,压电陶瓷的滞后效应和非线性效应的影响比较显著;随着外界湿度的增加,湿度对Si（100）表面粘附力和摩擦系数有较大的影响;此外,外加载荷和扫描循环次数直接决定Si（100）表面的耐磨性能.     

热作模具钢表面激光熔覆Stellite X-40钴基合金

利用2KWCO2连续激光在H13热作模具钢表面熔覆Steun X-40钴基合金,选择最佳的交互作用时间进行激光熔覆处理,可获得均匀细小的熔覆层组织。采用光学显微镜、扫描电子显微镜,X射线衍射仪、磨损试验机及动电位极化技术对熔覆层的组织结构、元素分布、磨损性能及电化学腐蚀性能进行了系统研究：结果表明,H13热作模具钢经激光熔覆SteuiteX-40钴基合金后,其抗磨损及腐蚀性能得到明显改善,经生产实际应用寿命考核,采用激光熔覆处理的H13钢模具,使用寿命提高3倍以上。     

Oblique Y-groove cracking test of the welding cold cracking susceptibility of domestic X-70 pipeline steel

“Gas Transmitting From West to East Project“ is significant.it should ensure the welding quality and safety of pipeline.The task is very arduous to guarantee the quality of the projcet in the condition of long line.complex weather and geolgy features.in this paper,the welding cold cracking susceptibility of domestic X-70 pipeline steel adopted by the project, which is one of the most interesting questions of welding quality about petrol pipeline,was studied by means of oblique Ygroove cracking test.The crack ration of surface and section was tested under the conditions of different welding materials and preheat temperature.The thickness of plate stell was 14.7mm and 10.3mm.The results reveal that X-70 pipeline steel has good crack resistance.The research has important value for the construction of large-scale pipeline engineering and the application of domestic X-70 pipeline steel.     

β-环糊精对曲拉通X-114紫外光谱抗干扰性能的影响

辛基苯基聚氧乙烯醚（曲拉通X-114）和脂肪醇聚氧乙烯醚（AEO-9）之间的相互作用能对水溶液中曲拉通X-114的紫外光谱产生明显影响。实验结果表明,在200～350nm范围内,曲拉通X-114的最大吸收波长为223nm,AEO-9的紫外吸光度接近于0;在水溶液中,AEO-9能减弱曲拉通X-114的紫外吸光度,降幅达3.4%;AEO-9还能显著降低曲拉通X-114的表观临界胶束浓度（cmc）,当AEO-9的浓度从0增加到0.050mmol/L 和0.100mmol/L时,曲拉通X-114的表观cmc从0.219mmol/L分别降至0.207mmol/L和0.202mmol/L。实验结果进一步表明,β-环糊精（β-CD）能有效降低AEO-9对曲拉通X-114的紫外吸光度及表观cmc的影响,在曲拉通 X-114和AEO-9复配水溶液中,按物质的量比1∶1加入β-CD,复配水溶液中曲拉通X-114的回收率从95.8%～103.3%变化至99.0%～100.1%,表明了β-CD能明显降低AEO-9对曲拉通X-114的干扰作用。红外光谱表征结果（FTIR）、核磁共振氢谱表征（¹H NMR）及热重差热分析表征结果（TG-DSC）表明,曲拉通X-114进入β-CD 分子空腔并形成包结物,是阻断曲拉通X-114分子形成混合胶束以及消除AEO对曲拉通X-114的干扰的主要原因。     

淬火温度对电弧微铸锻AerMet100钢组织与性能的影响

采用OM、XRD、SEM、TEM和力学性能试验方法,研究了在885～1150℃范围内不同淬火温度对电弧微铸锻增材制造AerMet100超高强度钢组织及力学性能的影响规律。结果表明,电弧微铸锻AerMet100钢原始态组织主要由板条马氏体和奥氏体组成,呈现出快速凝固的组织特征;随着淬火温度的升高,试验钢的凝固组织逐渐消失,当温度超过1050℃时基本上完全消除;断裂韧度随着淬火温度的升高表现出升高的趋势;抗拉强度和屈服强度随着淬火温度的升高没有明显变化;冲击吸收能量随着淬火温度的升高呈现先升高后下降的趋势,在淬火温度为1050℃时达到峰值。在试验温度范围内,1050℃左右淬火可获得优异的强韧性匹配,此时试验钢的断裂韧度为82.9 MPa·m^1/2,抗拉强度为2010 MPa,冲击吸收能量为50 J。