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作者： PODDA Philippe MIGNARD Francois GEORGES Stephane Vice President Cold Band Siemens VAI MTSaint-ChamondFrance Technical Sales Director Siemens VAI MTSaint-ChamondFrance Electric and Automation Product Lifecycle Manager for cold mills and processing lines.Siemens AG ErlangenGermany

＜正＞Within the last 10 years,Chinese steel producers have invested in continuous annealing facilities leading to a high install base *** of these plants is sized for approximately 0,6 to 1 million tons per year to serve massively the construction,industrial and automotive market with various product sizes and grades such:·Low carbon Al killed steel·IF steel for drawing qualities·High strength steel·Advanced high strength steel,DP,TRIP The continuous annealing Line process is now facing several challenges taking place at the same time,namely:·Serve Automotive demanding Industry,·Development of new steel grades especially AHSS,·Be responsible towards Health and Safety Environment by reducing energy consumption and emissions. These challenges are manageable through a very high Quality Manufacturing aiming down-grading reduction prime quality yield *** this purpose,Siemens is offering SIROLL PL,a set of powerful tools issued from years of research and *** from the Mechanic and Electric ＆ Automation point of view,these solutions can be advantageously use by Steel Producers.

关键词： steel CAL continuous annealing lines processing line surface inspection Siemens SIROLL SIFLAT SIAS SINAMICS China automotive

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Study on strip buckling in continuous annealing lines/hot galvanizing

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Baosteel Technical Research 2010年第S1期4卷 38-页

作者： LI Jun~(1)) and ZHANG Lixiang~(1,2)) 1) Research Institute,Baoshan Iron & Steel Co.,Ltd.,Shanghai 201900,China 2) Shanghai Jiao Tong University,Shanghai 200240,China

In continuous annealing lines/hot galvanizing,strips are guided by upper and lower rolls in an alternate up and down vertical *** kind of process consisting of heating,soaking,and cooling furnaces(or zones) has several advantages in terms of productivity and product *** problems encountered in continuous annealing lines are misguiding and formation of *** strip buckling causes the strip to be rejected and,in the worst case,the strip breaks and the continuous annealing lines are compelled to *** this paper the elastic-plastic model of the strip traveling and the corresponding boundary condition were constructed dependant on the theory of *** are performed in two ***,a homogeneous longitudinal tensile stress is applied at one end of the strip,the other end of the strip and the roll are *** the second step,the applied tension remains constant.A uniform displacement is applied to the other end of the strip and a rotation to the roll. The transverse compressive stress,the buckling formation during strip traveling process,the location for the buckling taking place and the buckling criterion were investigated *** result shows that the transverse compressive stress increases with the increase of the tensile stress and the crown of the tapered roll. Because the contact area between the tapered roll and the strip increase with the decrease of the crown,the tensile stress distribution is more homogeneous in the transverse direction of the *** additional transverse compressive stress is created and a buckling is also observed due to the friction during the strip motion in the second *** the buckling is appearance,it is very hard to be removed only through decreasing the applied longitudinal tension,because the strip wrinkle still keeps high level due to the effect of the buckled strip,the wrinkle would evolve into buckling *** buckling formation process predicted by the finite

关键词： strip continuous annealing lines buckling transverse compressive stress

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