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托圈是支承和带动炼钢转炉倾动的重要部件,本文就强度分析中托圈的力学计算模型这一关键问题进行探讨。作者从一个简例的计算结果阐明其力学机理,提出托圈与转炉一并考虑的力学计算模型,并简要引用某钢铁公司120吨转炉托圈强度计算的结果。 相似文献
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转炉托圈温度应力模态分析 总被引:1,自引:0,他引:1
托圈是支承转炉炉体的大型结构件,研究表明,危及托圈的主要因素是热应力过大,热应力的数值一般为机械应力的2 ̄3倍。从温度场入手描述了托圈温度应力分布的一般情况,给出了环状托圈温度应力计算的经验公式,从温度应力的角度出发,提出了托圈结构的优化原则。 相似文献
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转炉炉体与托圈的连接装置是转炉体系统的关键设备之一,它的结构是否合理直接影响托圈和炉壳的寿命及钢产量.文章系统介绍了一种新型实用的转炉炉体与托圈的连接装置的结构及特点. 相似文献
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本文论述了氧气转炉托圈的工作状态和负荷情况,从改善托圈受力状况、清除诸多导致托圈损坏的因素着手,在结构、材质及加工制造工艺等方面阐述了国内外延长氧气转炉托圈寿命的方法。 相似文献
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随着转炉的逐步大型化及炉龄的增加,转炉托圈与炉壳的连接形式由传统的三点球面支承式逐步向连杆吊挂式和弹簧钢板吊笼式发展,通过国内外考察结合实际应用,介绍了常用的三种形式的特点,对新建转炉有一定的参考意义。 相似文献
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分析了构筑和谐宣钢的关键要素,认为只有以发展循环经济、建设“数字宣钢”、“绿色钢铁”为己任,才能将宣钢建设成北方优质钢结构用钢精品基地。 相似文献
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钢铁企业成本管理模式的比较分析 总被引:1,自引:0,他引:1
对宝钢、武钢、邯钢的成本管理模式进行了比较分析,认为应该将标准成本、目标成本和责任成本有机地结合起来,构建更先进、合理、科学的企业成本管理模式. 相似文献
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冷轧复合材料的复合工艺实验 总被引:1,自引:0,他引:1
进行了钢 铜、钢 铝冷轧复合实验,即表面处理+复合轧制+轧后热处理。结果表明,复合轧制前,必须对基材和复合材料进行表面清洗,基材钢需进行表面毛化处理,要求表面粗糙度为Rz=81~101 μm,较薄的复合材料如铜、铝可不经毛化处理直接复合轧制。钢 铝无张力复合轧制所需总相对压下量为40%≤ε≤60%,钢 铜无张力复合轧制所需的总相对压下量为ε≥70%。应严格控制热处理的退火温度和保温时间,保温时间过长,会削弱复合面的强度;钢 铝退火温度控制在320 ℃左右,保温时间约1 h;钢 铜退火温度在550~600 ℃范围内,保温时间约15 h。研究认为复合轧制过程中,带材之间的相对跑偏、厚度比控制是亟待解决的问题。 相似文献
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M Hoffman JC Xu C Smith C Fanelli V Pascal C Degaetano G Meenan M Lehrer M Lesser M Citron 《Canadian Metallurgical Quarterly》1997,15(6):542-547
Our previous results showed that hematopoietic stem cells from 16-week-old Sl/Sl(d) mice are not as competitive as congenic +/+ control stem cells. Possible explanations for these findings are that the Steel stem cells are either inherently defective or lose competitive ability by residence in an environment lacking membrane-bound Steel factor. In the present report, any long-term effects of the Steel microenvironment were eradicated by transferring neonatal Sl(d)/Sl(d) marrow and spleen cells into an irradiated but otherwise normal adult hematopoietic microenvironment. Host cells were completely replaced by donor cells within 6 weeks. Eight months after transplantation, the Sl(d)/Sl(d) and similarly treated +/+ littermate control cells from the primary recipient marrow were competed against genetically marked normal cells in an irradiated secondary host. The Steel cells were as competitive as the control cells demonstrating that Steel stem cells are not inherently defective. Results suggest that the stem cells, when retained in the mutant environs into adulthood, are either reduced in number or phenotypically altered by lack of the membrane-bound Steel factor. 相似文献
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The world’s first commercial installation for direct casting of low-carbon steel sheet utilizing CASTRIP® technology is undergoing production ramp-up at Nucor Steel’s plant in Crawfordsville, Indiana. Construction of the plant was initiated in February 2001 and the first ladle was delivered to the caster in May 2002. Since that time, Nucor Steel has been working with technology partners BlueScope Steel (formerly BHP Steel) and IHI (Ishikawajima-Harima Heavy Industries) to fully commercialize this exciting new technology for the direct production of steel sheet less than 2 mm in thickness. 相似文献
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