共查询到20条相似文献,搜索用时 798 毫秒
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为扩大品种范围、提升产品竞争力,成渝钒钛科技有限公司决定在高线产线上开发φ6 mm HRB400E带肋钢筋盘条。设计了带肋钢筋盘条化学成分,通过控轧控冷工艺参数对热轧盘条组织性能影响的相关分析,制定了轧制工艺参数,并研究了不同风冷工艺对其组织性能的影响。结果表明,通过控轧控冷工艺的优化,可以稳定生产出φ6 mm热轧带肋钢筋盘条,盘条微观组织均匀,各项指标均符合国家标准对抗震钢筋的要求;轧后风冷速度对盘条组织性能的影响较大,当冷速过快时钢筋组织中会出现贝氏体,使钢筋出现无屈服平台现象,应采用适当冷速。 相似文献
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新疆八一钢铁股份有限公司在高速线材生产线上成功地开发出Φ10、Φ12mm带肋钢筋 ,介绍了Φ12mm带肋钢筋的孔型设计、控轧控冷工艺及试生产效果。 相似文献
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1 概况钢筋轧后控冷工艺受到了国内外的普遍重视,仅1989年国外生产控冷钢筋即为400×10~4t;1978年以来,我国也有不少单位采用“轴向湍流式冷却装置及轧后余热处理工艺”,使产品质量明显提高,不少企业的产品达到了国际水平。我国已采用钢筋控冷工艺的企业,其工艺布置多为横列式。下面探讨在连轧工艺布置上如何采用控冷技术。 相似文献
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研究了Q235普碳钢控轧控冷轧制HRB335和HRB400钢筋工艺中冷却速度和终轧温度对产品组织和性能的影响。试验结果表明,通过控制轧制和轧后控制冷却,采用Q235普碳钢轧制HRB335,HRB400钢筋的生产工艺是可行的,并提出了相关的控轧控冷工艺参数。 相似文献
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高速线材轧机控轧控冷工艺探索 总被引:1,自引:0,他引:1
通过采用控轧控冷工艺,对在高线轧机上用普碳钢生产KL400Ⅲ级螺纹钢筋进行探讨,经试轧,生产出Φ8mm的KL400Ⅲ级螺纹钢筋。结果表明,在具有低温轧制能力的高线轧机生产线上,采用控轧控冷工艺生产高强度钢筋是可行的。 相似文献
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介绍了影响钢管尺寸精度的主要因素及近年来国外开发的γ射线在线无损检测钢管外径和壁厚的检测与控制技术。比较了不同钢管生产方法壁厚控制的特点。不管采用何种钢管生产方法,都可通过优化模具设计和工艺制度,提高钢管的尺寸精度。 相似文献
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介绍了唐山国丰钢铁有限公司连铸连轧生产线的工艺流程、产品大纲、主要工艺设备和工艺特点以及实际生产情况。该生产线主要以薄规格的冷轧基板为主导产品,实物质量好,投产仅1年就收回了一半的投资。 相似文献
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通过对我国石油专用管业所面临的国际国内市场形势以及国际钢管企业重组的情况进展及特点的分析,认为重组已成为国际国内市场发展的必然趋势,企业重组不只出现在强势企业对弱势企业,强强联合也逐渐增多。对中国石油专用管生产企业的重组以及建议重组的原则、范围、方式及举措提出了见解。 相似文献
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1999年9月加拿大铝业公司收购了大韩线缆公司荣州轧制厂、组建成加铝-大韩铝业公司(ATA),加拿大铝业公司占66%股份,2000年。ATA公司收购了现代集团的韩国铝业公司蔚山轧制厂,从此,ATA公司拥有荣州轧制厂和蔚山轧制厂及一个研究中心,目前,ATA公司热轧板带生产能力500kt/a,冷轧带材生产能力300kt/a,荣州轧制厂将增建2台大型冷轧机,到2005年公司冷轧带材的生产能力将增加到500kt/a,成为世界上最大的铝板带轧制厂之一,荣州轧制厂有1条(1 3)式2438mm热连轧生产线、1条1676mm双机架冷轧机生产线、1台2235mm4辊不可逆式冷轧机,蔚山轧制厂有1台2800mm单机架4辊可逆式双卷取热轧机,2台2250mm4辊不可逆式冷轧机。 相似文献
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根据上海一钢(集团)公司的现状以及产业结构、技术装备水平的评估,探讨了一钢集团的发展战略,提出近期发展以坚持挖潜革新改造,提高整体实力为目标,在已组建集团公司的情况下,长远统筹规划,建设合理快畅高效的钢铁物流体系,实行集约化经营生产的构想。 相似文献
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Cu-0.4 wt.%Cr-0.12 wt.%Zr-0.02 wt.%Si-0.05 wt.%Mg was prepared by casting, quenching, aging and cold drawing. The microstructure was studied by electron microscope and X-ray diffraction. Vickers hardness was measured for the alloy after the annealing treatment at different temperatures covering a wide temperature range from room temperature to 700 °C. The ribbonlike structure is replaced by gross equiaxed grains. The crystal orientation is gradually approaching the full annealed specimen and the hardness difference between longitudinal and transverse directions vanishes by recovery and recrystallization. The thermal analysis was carried out and the stored energy was calculated. The release of stored energy and the reduction of resistivity are primarily due to the decrease of dislocation density. The main strengthening effect is attributed to dislocation mechanism. 相似文献
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Cold drawing was conducted at room temperature to impose high strain on Cu-0.4 wt.%Cr-0.12 wt.%Zr-0.02 wt.%Si-0.05 wt.%Mg. The microstructure was studied by X-ray diffraction and transmission electron microscope. The thermal analysis was carried out for the alloy at different draw ratios and then the stored energy was calculated to estimate the dislocation density and the flow stress. Results indicate that the microstrain gradually increases and the 〈1 1 1〉 texture is formed with the draw ratio rising. Meanwhile, the stored energy also increases with the draw ratio rising and a peak is reached with draw ratio of 6.7. The release of stored energy is primarily due to the decrease of dislocation density. The flow stress estimated from the stored energy has a similar variation trend with the measured data with a stress difference ∼20 to 120 MPa. The main strengthening effect is attributed to dislocation mechanism. 相似文献
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The as-cast eutectic Cu–71.8 wt.% Ag was prepared. The orientation relationship and interface structure of Cu and Ag phases were investigated using high-resolution transmission electron microscopy. The interface energies and nucleation rates in the formation of different orientation relationships were discussed. The Cu and Ag eutectic lamellae can form the cube-on-cube and hetero-twin orientation relationships and the occurrence probabilities of the two orientation relationships are approximate in the solidification of the eutectic structure. There are misfit dislocations and monolayer steps at the interface between both phases having the cube-on-cube or hetero-twin relationship. The twin fault and lattice mismatch energies at the interface result only in an insignificant effect on the formation of different orientation relationships between both phases of the eutectic laminae. 相似文献