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7311.钻头和卡盘隔离器的革新以减少锚杆钻机的噪音
[黑色金属冶炼和压延加工业] [2014-03-20]
Among underground coal miners, hearing loss remains one of the most common occupational illnesses.This paper documents the evolution of the bit isolator and chuck isolator. Laboratory testing confirms that production bit and chuck isolators reduce the A-weighted sound level generated during drilling.
关键词：钢铁；煤矿；钻头；锚杆钻进；职业安全与健康；噪音阻尼
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7312.无铅奥氏体不锈钢的发展
[黑色金属冶炼和压延加工业] [2014-03-20]
Pb-free austenitic stainless steels were investigated by adding sulfur, rare earth (Re) elements and bismuth. The metallurgical properties, machinability and mechanical properties of both steels were examined. The results show that a significant amount of grey, spindle shaped inclusions were discovered in austenitic stainless steels, and they should belong to MnS inclusions containing bismuth element and rare earths oxide.
关键词：钢铁；机械加工性；无铅奥氏体不锈钢；稀土
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7313.铝桥面板的发展和配置
[黑色金属冶炼和压延加工业,金属制品业,建筑业] [2014-03-20]
This report contains the analysis and retrofit of a steel truss bridge on KY 974 over Howard Creek in Clark County, Kentucky. The bridge had major corrosion and damage to the steel stringers, along with cracking and leaching occurring in the concrete bridge deck.
关键词：钢铁；铝桥面板；裂化；腐蚀；配置
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7314.转炉脱磷的实证研究
[黑色金属冶炼和压延加工业] [2014-03-20]
The situations of smelting SPHD were analyzed for 150t converter in TangSteel. Based on the analysis of dephosphorization process and the thermodynamic conditions in converter, the operation of dephosphorization was optimized. The industrial tests for dephosphorization were carried out, and the results were analyzed. The results were shown that the distribution coefficient would be the highest value, when the alkalinity of slag was 3.5 and the FeO content was 21％ in making SPHD steel. The distribution coefficient would reduce, when the temperature was increased, especially more than 1700℃, so end point temperature should be best less than 1700℃.
关键词：钢铁；脱磷；转炉；热力学
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7315.正交异性钢桥面桥梁的设计、建造和维护指南
[建筑业,黑色金属冶炼和压延加工业] [2014-03-20]
This Manual covers the relevant issues related to orthotropic steel deck bridge engineering, including analysis, design, detailing, fabrication, testing, inspection, evaluation, and repair.
关键词：钢铁；高速公路桥；桥面；测试；分析；设计；检验；评估
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7316.一种新的高强度外包钢混凝土复合梁的性能研究
[黑色金属冶炼和压延加工业,非金属矿物制品业] [2014-03-20]
On the basis of the theoretical study and application of ordinary steel-encased concrete composite beam,this paper will focus on a new high-strength steel-encased concrete composite beam,and mainly studies high-performance steel Q420 and Q460,as well as high-strength concrete C60 and C80.Besides,an experimental study of 5 simply-supported beams is made,and the load-deflection curves of new SCCB are analyzed.The calculation formula of load which changes with depth of section and bending strength of the cross section is also analyzed.It is suggested that the calculated results announced should be identical with the experimental results.
关键词：钢铁；高强度外包钢混凝土复合梁；高性能；承载力
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7317.弗罗里达大桥桥面与钢梁的缝隙密封问题——概要
[黑色金属冶炼和压延加工业] [2014-03-20]
One of the biggest problems affecting bridges is the transverse cracking and deterioration of concrete bridge decks.This research identifies suitable sealing materials for deck cracks showing their ability to span cracks of various widths and achieving performance criteria such as penetration depth, bond strength to crack walls, elongation, viscosity, penetration, and suitability of the type of sealant.
关键词：钢铁；桥面；密封；裂缝；高分子量丙烯酸甲酯
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7318.提高外包尖晶石的AISI411铁素体不锈钢性能的表面处理
[黑色金属冶炼和压延加工业] [2014-03-20]
Ferritic stainless steels are promising candidates for IT-SOFC interconnect applications due to their low cost and resistance to oxidation at SOFC operating temperatures.To potentially extend interconnect lifetime and improve performance, a variety of surface treatments were performed on AISI 441 ferritic stainless steel coupons prior to application of a protective spinel coating.
关键词：钢铁；尖晶石；表面处理；不锈钢；互连材料；料电池
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7319.碳含量对耐候钢的耐蚀性的影响
[黑色金属冶炼和压延加工业] [2014-03-20]
The corrosion resistance performance of different carbon content weathering steels were investigated by cycle immersion corrosion test, rust layer micro-analysis and electrochemical impedance spectra techniques. The results show that the corrosion resistance performance is enhanced with decreasing carbon content of weathering steel. And the corrosion potential of rust layer becomes more positive, corrosion current density decreases, the anode dissolution of rust layer is impeded and the rust layer have more protect performance for test steel with decreasing carbon content of weathering steel.
关键词：钢铁；耐候钢；耐蚀性；锈层
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7320.探索美国和国际中钢渣集料在硅酸盐水泥混凝土中的应用
[非金属矿物制品业,黑色金属冶炼和压延加工业] [2014-03-20]
The issue of sustainability in the built environment is increasingly important, particularly in the transportation sector.In this research, laboratory investigations of the use of steel slag as a portland cement concrete (PCC) aggregate were reviewed. Much of this research took place outside the United States.
关键词：钢铁；钢渣集料；硅盐酸水泥混凝土
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