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7281.回火温度对35crmnsimo铸钢的微观结构和机械性能的影响
[黑色金属冶炼和压延加工业] [2014-03-26]
The tempering temperature on microstructure and mechanical properties of 35CrMnSiMo cast steel are studies in this article.Results showed that 880℃ x30min 35CrMnSiMo cast steel after quenching water,hardness up to 49.6HRC,reached 39.04 J/cm2 toughness.
关键词：钢铁；回火温度；微观结构；机械性能
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7282.利用15crmo钢测定拉森米勒方程中的C值
[黑色金属冶炼和压延加工业] [2014-03-25]
A new method of determination of C parameter of Larson-Miller equation was introduced.For 15CrMo steel,the optimal value of parameter C in the equation was derived.The reliability of the obtained results was analyzed.
关键词：钢铁；拉森米勒方程；15crmo钢；参数确定
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7283.钢铁企业电力生产优化模型及其应用
[电力、热力、燃气及水生产和供应业,黑色金属冶炼和压延加工业] [2014-03-25]
On the base of the analysis of the electricity production and consumption characteristics of iron and steel enterprises,this paper has established a optimization model of electricity production in iron and steel enterprises which comprehensive considered the electricity,gas,and steam.It can do joint optimization scheduling from electricity production and outsourcing,gas distribution,and steam production three sides,so that it can provide a reasonable electricity production and outsourcing strategy for iron and steel enterprises to reduce the system operation costs.
关键词：钢铁；钢铁企业；电力；优化；节能
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7284.AISI1005钢在气体保护金属极电弧焊中计算模型的结构演化
[黑色金属冶炼和压延加工业] [2014-03-25]
A fully coupled (two-way), transient, thermal-mechanical finite-element procedure is developed to model conventional gas metal arc welding (GMAW) butt-joining process. Two-way thermal-mechanical coupling is achieved by making the mechanical material model of the workpiece and the weld temperaturedependent and by allowing the potential work of plastic deformation resulting from large thermal gradients to be dissipated in theform of heat.
关键词：钢铁；AISI1005；有限元模型；气体保护金属极弧焊；对接焊接；结构演化
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7285.不锈钢管冷轧工艺过程的有限元仿真分析
[黑色金属冶炼和压延加工业] [2014-03-25]
关键词：钢铁；不锈钢；冷轧；FEM
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7286.对850℃时效处理下2205双相不锈钢金属间相的定量分析
[黑色金属冶炼和压延加工业] [2014-03-25]
The precipitates in 850℃ aging 2205 Duplex stainless steel were extracted by the method of carbon extraction replicas.The method makes precipitates disperse uniformly and the contrast between precipitates and matrix distinct.TEM(Transmission Electron Microscope),EDS(Energy Dispersive Spectrometer) and SEM (Scanning Electron Microscope) were applied for the observation ofmicrostructure.The SEM micrographs were used for intermetallic size statistic,which revealed that the sizes of intermetallic increased with aging time.
关键词：钢铁；2205双相不锈钢；850℃时效处理；金属间化合物；碳萃取
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7287.单肋式箱形截面钢弓弦拱桥面内和面外的不稳定耦合分析
[建筑业,黑色金属冶炼和压延加工业] [2014-03-25]
Steel single rib box section arch bridge is established on the basis of secondary development using parametric language of large-scale finite element software ANSYS.On the premise of same sectional area A of arch rib,height breadth ratio h/b is changed,and both the spatial instability mode under the condition of arch bridge's dead weight and the stability safety coefficient under the condition of the first step instability mode is calculated.With the aim to optimize distribution of stiffness and stability of single rib arch bridge,the target is to find out a height breadth ratio h/b which can make in-plane and out-plane instability mode coupling,that is to say,equivalent stiffness of in-plane and out-plane of the mode.
关键词：钢箱单肋拱桥；不稳定模式；安全系数；ANSYS；抗弯刚度
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7288.钢铁坯料在高温下的抗氧化涂层
[黑色金属冶炼和压延加工业] [2014-03-25]
A new kind of anti-oxidation coating for steel billets at high temperature was prepared.The resistance property of the coatings for oxidation was investigated.The result indicated that the coatings could decrease the oxidation loss at 1300℃.The anti-oxidation mechanism of the coatings on the surface of steel billets at high temperature was proposed at the same time.
关键词：钢铁；高温抗氧化性能；钢铁坯料；涂层
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7289.应用于锅炉气热回收中高压蒸发器的SA210钢管的腐蚀失效分析
[通用设备制造业,黑色金属冶炼和压延加工业] [2014-03-25]
The corrosion failure analysis of an SA210 steel used in high pressure evaporator tube is conducted by XRD,SEM,OM.The result shows that the corrosion products in the inner wall of the steel tube is Fe3O4,mainly caused by the residual water in the evaporator tube corroding its inner wall with oxygen after the hydrostatic test of the boiler,finally leading to the corrosion leak of the tube.
关键词：钢铁；SA210钢管；高压蒸发器；气热回收锅炉；氧腐蚀
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7290.2013年钢铁相关行业运行情况及发展趋势
[专用设备制造业,金属制品业,汽车制造业,通用设备制造业,黑色金属冶炼和压延加工业] [2014-03-24]
2013年1-11月，全国规模以上工业增加值继续保持增长态势，增加值同比增长9.7%.比2012年同期回落0.3个百分点，比2011年同期回落4.3个百分点。预计2013年全年累计同比增长率难以超过10%。分行业来看，黑色金属冶炼及压延加工业呈现下滑趋势，金属制品业、通用设备制造业、专用设备制造业保持稳定增长，汽车制造业增长幅度扩大。
关键词：钢铁；机械工业；运营
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