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7321.硅钢的磁致伸缩量测的测量方法和样本选择研究
[黑色金属冶炼和压延加工业] [2014-03-20]
Magnetostriction of silicon steel is the main cause of the noise of transformer,while its measuring method is argumentative.It was investigated in this paper the effect of sample size on the measuring stability and reproducibility using laser displacement meter method.It was found that for the sample size 100mm×500mm the measuring stability and repeatability are the best comparing to the size of 30mm×300mm,30mm× 100mm and 60mm× 100mm.For samples with the above for sizes cutting from the same sheet,the magnetostriction of 100mmx500mm size sample is the smallest.
关键词：钢铁；磁致伸缩；硅钢；稳定性
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7322.Ti6Al4V钢制品在真空中的磨损性能研究
[黑色金属冶炼和压延加工业] [2014-03-19]
This investigation was prompted by results of a qualification test of a mechanism to be used for the James Webb Space Telescope.The wear phenomena were investigated using dedicated laboratory experiments. Tests were done using a vacuum roller rig for a range of roller misalignment angles. The wear in these tests was mainly adhesive wear. The measured wear rates were highly correlated to the misalignment angle.
关键词：钢铁；磨损度；钛合金；铝合金；轧辊；性能测试
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7323.一种新型钢铁的高温渗碳处理
[黑色金属冶炼和压延加工业] [2014-03-19]
This program was undertaken to develop a microalloy-modified grade of standard carburizing steel that can successfully exploit the high temperature carburizing capabilities of current commercial low pressure (i.e. 'vacuum') carburizing systems.
关键词：钢铁；渗碳；算法；材料加工
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7324.低价、高性能钢铁在基础设施应用中的发展与销售
[黑色金属冶炼和压延加工业] [2014-03-19]
This project addressed the goal of National Strategy for Surface Transportation Research to improve highway structures by enhanced materials, in particular by design and implementation of new, drastically improved steels with respect to strength, low-temperature fracture toughness, weldability, and weatherability.
关键词：钢铁；销售；高速公路建设；桥梁
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7325.2014年中国钢管市场需求预测与分析
[金属制品业,黑色金属冶炼和压延加工业] [2014-03-19]
由于国家“稳中求进”的经济方针，随着新型城镇化的稳步推进，国家在基础设施建设、绿色能源方面的投资将加大，建筑、汽车、家电等行业对钢材的需求将保持一定的增长，钢管市场与其他钢材市场相比，市场需求仍保持增长势头，预计2014年钢管市场需求同比增长约3%，出口增长约5%。
关键词：钢管；需求
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7326.肯尼迪航天中心关于验证柠檬酸可替代硝酸钝化不锈钢的实验指南
[黑色金属冶炼和压延加工业] [2014-03-19]
The primary objective of this effort is to demonstrate and validate citric acid as an alternative to nitric acid for the passivation of stainless steels.The primary objective of this effort is to demonstrate and validate citric acid as an alternative to nitric acid for the passivation of stainless steels.This project will use the results from that testing to determine what process parameters will be used in the preparation of test coupons. This Test Protocol contains the critical requirements and tests necessary to qualify citric acid as an alternative to nitric acid for use at KSC.
关键词：钢铁；柠檬酸；硝酸；不锈钢；氮氧化物；污染控制
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7327.裂变电力系统应用中钎焊的微观结构纲要
[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] [2014-03-19]
This investigation is part of the development of several braze joints crucial for the heat exchanger transfer path from a hot-side heat exchanger to a Stirling engine heat acceptor.This paper addressed the long-term microstructural stability of various braze alloys used to join 316L stainless steel heater head to the high conductivity oxygen-free copper acceptor toensure the endurance of the critical metallic components of this sophisticated heat exchanger.
关键词：钢铁；钎焊；微观结构；低碳钢；金属结合；热传递
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7328.利用螺旋切口扭转试验开发疲劳预制裂纹步骤以评估管线钢断裂韧性的研究
[黑色金属冶炼和压延加工业] [2014-03-19]
The reliability of structure components, particularly resistance to damage and failure in the intended service environment, is highly dependent on the selected materials. An effective surveillance program is also necessary to monitor the material degradation during the course of service. Steels have been proven to be desirable for hydrogen infrastructure. However, hydrogen embrittlement is an important factor that limits steel performance under high-pressure hydrogen conditions.In order to reach the above goal, we have proposed an innovative technology, based on spiral notch torsion test (SNTT) methodology, to effectively investigate the material performance of X52 pipeline steel.
关键词：钢铁；切口实验；疲劳性能；管线钢；氢脆性
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7329.2014年3月上半月钢铁行业要闻综述
[黑色金属冶炼和压延加工业] [2014-03-18]
《新京报》03月03日报道，在库存高企、需求不振和“压钢治霾”等多重不利因素影响下，春节后国内钢市依旧惨淡，迟迟不见好转。最新数据显示，2月份国内钢铁行业PMI指数为39.9%，较上月回落0.8个百分点。这一指数已连续3个月下降。在钢材产量和价格持续回落之外，需求低迷的态势也没有改观。2月份，钢铁业新订单指数为32.4%，环比回落1.1个百分点，连续6个月处于50%以下的收缩区间。
关键词：钢铁行业；要闻综述
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7330.2014年生产资料分析与预测（第一期）
[汽车制造业,综合,橡胶和塑料制品业,有色金属冶炼和压延加工业,黑色金属冶炼和压延加工业,采矿业,石油加工、炼焦和核燃料加工业] [2014-03-13]
2014 年，伴随着政策效应和改革红利释放，新型城镇化建设加快推进、市场活力和经济内生增长动力进一步增强，宏观经济将延续“稳中向好”发展态势。从生产资料市场发展来看，预计行业运行中的有利条件和积极因素趋于增多，整体环境改善，特别是城镇化建设加快和物流业发展，将为生产资料市场发展带来较大空间，市场供需增速将继续加快，企业经营状况将有所好转，市场价格也有望止跌趋稳。
关键词：生产资料；石油；煤炭；钢材；有色金属；天然橡胶；汽车
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