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介绍了宣钢连轧中型生产线矫直机改造情况.因800矫直机矫直能力不足,限制了更大规格、更高强度钢种产品及矿用U型钢的开发生产,技术人员根据连轧中型生产线工艺布置及设计品种的工艺要求,对矫直机改造提出技术要求.根据现场使用经验,自主设计了各规格矫直辊;在矫直机初步设计审查中,对矫直机部分结构提出改进方案,使矫直机更适用于现场工艺.通过矫直机改造,提高了矫直能力,增加了矫直产品规格,提高了产品产量和质量,满足了市场需求. 相似文献
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简述了首钢第三炼钢厂2号、3号方坯铸机高效化改造的重要性,概述了结晶器、结昌器振动装置、拉矫机的特点和功能,分析了铸机弧型段、水系统、二冷室抽蒸气道改造后的效果,并介绍其生产应用和考核情况。 相似文献
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本文介绍了安钢第三炼钢厂1500mm板坯连铸机结晶器液面及拉矫力的控制原理,分析了结晶器液面波动及拉矫力波动产生的原因,处理方法和生产实际效果。 相似文献
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A new continuous bending and straightening casting curve with the aim of full using of high-temperature creep deformation was proposed.The curvature of bending and straightening segment varies as sine law with arc length.The basic arc segment is shortened significantly so that the length of bending and straightening area can be extended and the time of creep behavior can be increased.The distance from solidifying front in the slab was calculated at 1 200°C by finite element method.The maximum strain rate of new casting curve at different locations inside the slab is 6.39×10~(-5) s~(-1) during the bending segment and it tends to be 3.70×10-5 s~(-1) in the straightening segment.The minimum creep strain rate is 7.45×10~(-5) s~(-1)when the stress is 14 MPa at 1 200°C.The strain rate of new casting machine can be less than the minimum creep strain rate.Thus,there is only creep deformation and no plastic deformation in the bending and straightening process of steel continuous casting.Deformation of slabs depending on creep behavior only comes true.It is helpful for the design of the new casting machine and improvement of old casting machine depending on high temperature creep property. 相似文献
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