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7251.无防护涂层的304奥氏体不锈钢的激光冲击强化实验研究
[黑色金属冶炼和压延加工业] [2014-03-31]
Laser Shot Peening without protective Coating (LPPC) was performed on SS304 austenitic stainless steel using a 300 mJ, 10 ns pulse, 1064 nm wavelength Nd:YAG laser with three different pulse densities. A thin layer of water was used as a confinement layer. The peened specimen was characterised with XRD, AFM and a Profilometer. The stress evaluated at the surface of the laser peened sample shows a maximum compressive stress of 1.6 GPa. The surface roughness and depth profile of microhardness before and after LPPC were investigated.The LPPC region indicate substantial improvement in microhardness and compressive residual stress, with marginal increase of surface roughness.
关键词：钢铁；激光冲击强化；脉冲密度；局限层
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7252.3d钢房材料的层次分析
[黑色金属冶炼和压延加工业,建筑业] [2014-03-28]
This paper proposed a hierarchical architecture of steel house materials. The proposed architecture will include the detailed information of the components. For this, we made description about steel house design method and material change task ontology. Especially AFM is composited with total four steps. Using the method, the solution process of possible problems occurred in a steel house can be converted to an otology. Also we made category about composite patterns of steel house materials.
关键词：钢铁；钢房；材料；3D；AFM
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7253.基于量子蚁群优化算法的冷轧带钢的缺陷识别
[黑色金属冶炼和压延加工业] [2014-03-28]
To enhance plate quality of cold rolling strip steel, a method based on Ant Colony Optimization with Quantum Action (ACO-QA) is developed. In this method, each ant position is represented by a group of quantum bits, and a new quantum rotation gates are designed to update the position of the ant. In order to makes full efficiency, a pretreatment using fuzzy method is firstly adapted before resolving the mathematical model with ACO-QA. This method overcomes the shortcoming of ACO, which is easy to fall into local optimums and has a slow convergence rate in continuous space.
关键词：钢铁；缺陷识别；冷轧；量子算法；蚁群优化算法
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7254.2014年宏观经济及国内钢铁市场展望
[综合,黑色金属冶炼和压延加工业] [2014-03-28]
从主要经济体来看，2014年美国经济复苏前景较好，有望成为全球经济的推动力，而日本和欧元区均存在不确定因素，经济仍然存在下滑风险；我国经济仍然以稳定增长为主基调，增速预期与2013年水平相当，呈现小幅波动走势。2014年我国钢铁行业供求矛盾预期出现好转，但仍然维持供过于求的局面，新的一年钢铁业将面对严峻的环保压力与结构调整的艰巨任务，由于政策因素与贸易环境趋于恶化，我国钢铁出口压力仍较大。
关键词：经济；美国；日本；欧元；钢铁；出口；供求
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7255.钢冷却过程中膜状沸腾的计算流体动力学模拟
[黑色金属冶炼和压延加工业] [2014-03-28]
关键词：钢铁;射流冲击冷却;膜状沸腾；CFD；VOF；热传系数
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7256.带钢热轧机电气回路的应用
[黑色金属冶炼和压延加工业] [2014-03-27]
This paper introduced the application of the loop on the hot strip mill.The loop mainly support the strip steel,form the loop variable which can adjust the dynamic speed of the mill,keep the pulling force of the strip steel between the framework,participate the speed control of the framework of the finishing rolling and the quality of the strip steel is ensured.
关键词：钢铁；回路；带钢
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7257.轧钢厂淬火温度自动监控系统
[黑色金属冶炼和压延加工业] [2014-03-27]
In forging process,quenching temperature is the critical factor on affecting products solidity and wear resistance.In order to guarantee products quality and improve work efficiency,it is very essential to monitor and control quenching temperature automatically.To keep quenching temperature in normal range,a novel automatic supervisory control system based on SCM minimum system was designed.By selecting appropriate sensor and corresponding signal processing,the system realized functions of many furnace temperature supervisory,temperature excursion alarming and temperature regulating By simulation results,the system can realize automatic and intelligent supervisory,also,the system has characteristics of simple hardware,high reliability,powerful functions and strong practicality.
关键词：钢铁；淬火温度；自动监控；模拟；信号处理
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7258.基于双场检测的带钢表面缺陷检测的自适应预处理方法
[黑色金属冶炼和压延加工业] [2014-03-27]
A new Processing flow is put forward. Firstly, the suspected defect images are filtered out, and only the images that contain defects can be processed in the follow programs. Secondly, the retained suspected defect images are divided into two categories. Different categories are handled by different process. The simulation experiment result shows that: it not only makes full use of the advantages of the double field method, and greatly reduces the image data quantity, at the same time ensuring the real-time of the system.
关键词：钢铁；带钢；缺陷检测；实时
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7259.表面渗铝氧化处理后8407钢的抗熔损性能研究
[黑色金属冶炼和压延加工业] [2014-03-27]
The melting-loss properties of specimens with aluminization and oxidation treatment and without treatment in liquid aluminum alloy of ADC 12 under rotation condition were evaluated by weight loss method.Sample surface conditions were observed by digital camera and microstructures of sample cross sections were observed by metallographic microscope after melting-loss test.Finally,the anti-melting-loss mechanism of oxide film under dynamic condition was clarified.The results show that the formed Fe3O4·Al2O3 film can improve dynamic melting-loss resistance due to isolating steel substrate from liquid aluminum.
关键词：钢铁；8407钢；室温硬质阳极化；熔损性
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7260.冷却过程中钢板的材料模型
[黑色金属冶炼和压延加工业] [2014-03-27]
The time-dependent inhomogeneous temperature distribution in steel plates during the cooling increases thermal-strains which,in turn,generate plastification and thus residual stresses.Moreover,phase transformation from the parent austenite phases into a product phase typically entails not only metallurgical strains but also accounts for transformation induced plasticity (TRIP),which again generates transformation related residual stresses.A unified material model that consisting of all relevant contributions to the total strain rate,i.e.,elastic,plastic,thermal,metallurgical and TRIP strain contributions could be built in this paper.
关键词：钢铁；钢板；冷却；相位变换；残留应力；材料模型
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