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在钢筋混凝土排架结构厂房改造中,采用托梁截柱的方案,针对工程特点,辅之以树根桩加固地基,承台梁加固柱基础,钢板湿包法加固牛腿和厂房柱翼缘,利用厂房柱工字形横截面构造点,拆割腹板设置钢托梁托起厂房柱等技术手段,有效地解决了该厂房改造的难题,以及生产与施工的矛盾。 相似文献
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针对包钢集团轨梁生产线改造工程,结合生产工艺的使用要求,对原有轧钢车间矫直机跨U列和H列的137~#和142~#厂房下柱进行抽柱改造,采取"托梁截柱"的方案实施改造,仅将需抽掉的厂房柱下柱截除,上柱及屋面系统仍保留原有结构,采取可靠的设计构造和施工措施,既实现了新的生产工艺要求,又保证了厂房系统的空间整体性,并兼顾了改造工作经济合理性。 相似文献
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柳钢转炉扩容改造工程托梁拔柱是在边生产边施工的情况下完成的,施工中采用科学的工艺流程、多种技术措施和安全措施,最后顺利实现了设计意图。此次托梁拔柱的施工与常规的托梁拔柱施工也存在一些不同之处。 相似文献
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本文介绍一种与常规方法不同的设计方法。在不改变原有厂房结构与布置的情况下,通过对局部柱列托梁截柱的处理,即可满足新的工艺要求,以达到节省资金和工期的目的。 相似文献
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从我国经济走向世界经济竞争出发,在分析我国钢铁工业现状与大国如何转变为强国的基础上,具体剖析了安钢跨入“钢铁强厂”的实践和可能性,阐述了如何适应从钢铁大国走向强国的思路。 相似文献
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通过Thermecmastor-Z热模拟试验机研究了WL510钢(/%:0.090C、0.13Si、1.45Mn、0.005S、0.019P、0.040Al、0.020Ti、0.030Nb)粗轧后板坯(36 mm×1 500 mm)在1~36℃/s连续冷却条件下的相变和组织的变化,并用热膨胀法测定了试验钢连续冷却转变(CCT)曲线。结果表明,试验钢WL510在1~23℃/s低冷却速度下,主要形成多边形铁素体和少量珠光体;当冷却速度≥30℃/s时,主要组织为细针状铁素体、少量细珠光体和岛状马氏体/奥氏体(M/A)随着冷却速度的增加,试验钢组织明显变细。 相似文献
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Adina Basa Christian Thaulow Afrooz Barnoush 《Metallurgical and Materials Transactions A》2014,45(3):1189-1198
A highly stable austenite phase in a super duplex stainless steel was subjected to a combination of different gallium ion doses at different acceleration voltages. It was shown that contrary to what is expected, an austenite to ferrite phase transformation occurred within the focused ion beam (FIB) milled regions. Chemical analysis of the FIB milled region proved that the gallium implantation preceded the FIB milling. High resolution electron backscatter diffraction analysis also showed that the phase transformation was not followed by the typical shear and plastic deformation expected from the martensitic transformation. On the basis of these observations, it was concluded that the change in the chemical composition of the austenite and the local increase in gallium, which is a ferrite stabilizer, results in the local selective transformation of austenite to ferrite. 相似文献
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Dynamic CCT Diagram of Automobile Beam Steel With High Strength Produced by FTSR Technology 总被引:1,自引:0,他引:1
The dynamic continuous cooling transformation(CCT)diagram and phase transformation rules of 510 MPa automobile beam steel,which is produced by a continuous casting of thin slab of FTSR technology in Tangshan Iron and Steel Co.Ltd.,are researched by thermal simulation experiment.The microstructure characteristics of the beam steel under different test conditions are studied by means of optical microscope and scanning electron microscope.The test results show that the critical temperatures of phase transformation Ar3 and Ar1 will all decrease with the increase of the cooling rate.When the cooling rate is lower than 20 ℃·s-1,the ferrite and pearlite phase transformations are the main parts;when the cooling rate is higher than 20 ℃·s-1,the bainite phase appears.Moreover,the microstructures of 510 MPa automobile beam steel produced by FTSR technology are also studied,and the results are basically in accordance with the CCT diagram gained from the test. 相似文献
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带钢步进梁式加热炉节能技术的应用 总被引:1,自引:0,他引:1
莱风轧钢厂带钢国间采用步进梁式加热炉,在生产中应用了热送热装工艺,降低钢坯加热温度,对助燃空气进行预热,提高加热炉保温性能,采用高铲节能型燃烧器,实现计算机控制烧钢等节能技术,使煤气消耗平均降至1.1GJ/t。 相似文献
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