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141.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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142.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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143.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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144.高铬钢辊在锻造退火状态的微观结构分析
[黑色金属冶炼和压延加工业] [2014-03-24]
This paper investigates the annealed microstructure of a new high chrome steel for roiler,using methods of SEM、DES、XRD and hardness tests.The results show that the spheroidizing annealed high chromium steel is constitutive of ferrite and globular cementite,and the microstructure is relatively reasonable.But there are disadvantage characters such as small holes in the vicinity of the grain boundary,and residual lamellar pearlite exists in local area.In this paper,generation mechanisms of these characters are explained,and prevention methods are given for the weakness of the high chorme steel for roller.
关键词：钢铁；高铬钢辊；球化退火；微观结构
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145.通过提高成碳减小高分子材料的可燃性——总结报告
[黑色金属冶炼和压延加工业,有色金属冶炼和压延加工业,化学原料和化学制品制造业] [2014-03-24]
One weak aspect of synthetic polymer materials compared with steel and other metals is that these materials are combustible under certain conditions. Thus, the majority of polymer-containing end products must pass some type of regulatory test to assure public safety from fire. The main objective of this research is to apply combined effects of a catalyst in a clay-based polymer nanocomposite to enhance formation of char from a resin to form a protective layer consisting of char enhanced clay network during burning.
关键词：钢铁；高分子；碳化；可燃性；复合材料
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146.自应力陶粒钢管混凝土短柱火灾后轴向压缩行为的研究
[非金属矿物制品业,黑色金属冶炼和压延加工业] [2014-03-24]
The post-fire axial compressive behavior of a set of self-stress lightweight aggregate concrete filled steel tubes (noted as SSLC-ST) after exposure to fire was studied.Effect of the fire temperatures of the specimens and some parameters on the axial compressive behavior of the specimens was especially discussed.The results show that the initial circumferential strain of surface of the steel tubes is much larger than the longitudinal strain of the steel tubes,and the specimens of SSLC-ST have higher post-fire axial compression bearing capacity and better plastic deformation.It was concluded that the local buckling and overall failure of the specimens take place in succession while the specimens are axially loaded,and there are a lot of slip lines with angle of 45° on surface of the steel tubes.
关键词：钢铁；钢管混凝土；自应力陶粒钢管；火灾后行为；轴向挤压
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147.铠装钢和钨合金的本构模型参数研究
[有色金属冶炼和压延加工业,黑色金属冶炼和压延加工业] [2014-03-24]
The study revealed that no single combination of Johnson-Cook model parameters provides superior overall prediction of penetration depth over the other possible combinations across the full range of rod L/D considered. The study provides valuable guidance on the selection of material model parameters future studies of kinetic energy penetration.
关键词：钢铁；铠装钢；钨合金；积木式分析；人因工程学
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148.烫印过程中DP钢发动机罩的结构分析和质量预测
[汽车制造业,黑色金属冶炼和压延加工业] [2014-03-24]
In the paper,it took the hot stamping process of DP steel engine hood for example and took DP800 as object of research.The forming limit,variation of major strain,minor strain and thickness,as well as the potential equality defects were analyzed by using eta/DYNAFORM software.The research results show that duplex steel plate can meet the performance requirements of car engine dumping plank forming,which offers theory basis for the production of similar parts.
关键词：钢铁；应变分析；发动机罩；烫印
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149.氢发射环境中高强度钢材的寿命预测模型开发
[黑色金属冶炼和压延加工业] [2014-03-24]
Hydrogen embrittlement of high strength steel is the most predominant unforeseen hurdle since high strength materials show sensitivity to the phenomena and the source of the hydrogen can be anything within the fabrication process, maintenance practice, or the natural corrosion cycle. Historically, the various aerospace defense contractors have each tested in their own manner, which has led to the national standard incorporating many approved test geometries and grey procedures. This work evaluated hydrogen susceptibility over a range of material strength, load level, and hydrogen emitting environment (weight- percent sodium chloride NaCl) which demonstrated performance with parameter ranges, not as pass/fail results, while developing life predictive models for each geometry.
关键词：钢铁；刚强度合金；氢脆；航天系统；寿命预测模型
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150.V型防烟火自动阀的故障模式分析
[黑色金属冶炼和压延加工业] [2014-03-24]
Current V-shaped stainless steel pyrovalve initiators have rectified many of the deficiencies of the heritage Y-shaped aluminum design. However, a credible failure mode still exists for dual simultaneous initiator (NSI) firings in which low temperatures were detected at the booster cap and less consistent ignition was observed than when a single initiator was fired. In order to asses this issue, a numerical framework has been developed for predicting the flow through pyrotechnically actuated valves.
关键词：钢铁；v型不锈钢；故障模式；烟火装置；调节阀；计算流体动力学
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