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Reducing Axial Segregation in a Continuous-Cast Semifinished Product by Micro-Alloying 总被引:1,自引:0,他引:1
Nosochenko O. V. Isaev O. B. Lepikhov L. S. Degtyarev P. A. Kharchevnikov V. P. Mel'nik N. P. Lyudkovskii V. M. 《Metallurgist》2003,47(5-6):244-247
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本文用视塑性法研究轧制过程金属塑性变形特性。通过网格法试验得到纯铅轧制时的流线,并对变形率为21%的薄轧件(8×60mm)之变形特性进行了全面分析,还对变形率为8.8%的厚轧件(40×30mm)作了初步计算。 相似文献
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通过MARC提供的开放接口和相应子程序系统,集成多尺度的计算模块,在MARC2010和FOR-TRON10.1平台对某钢厂中厚板热轧生产线某生产牌号产品的生产实现考虑微观组织演变的有限元数值模拟计算。对模拟结果中各场变量(再结晶分数、晶粒度和轧制力)在不同轧制道次的变化规律,进行了详细分析。对本文模型和周纪华模型的相应轧制力计算值与现场实测值进行了对比分析。进一步验证了本文的模拟计算是科学合理的。 相似文献
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采用三维大变形热-力耦合有限元法分析了辊速不等的非对称热轧板带变形区内轧件的变形情况,得到了不同辊速比条件下变形区内应力、应变和应变能量密度的分布规律。结果表明:在辊速比不同的非对称轧制条件下,会产生不同于普通压缩变形的附加剪切变形,而且这种附加剪切变形为组织细化提供了有利条件。 相似文献
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Reducing the amount of fuel used to heat continuous-cast semifinished products before rolling is an important problem in modern high-speed rolling operations. The heating furnaces of high-speed rolling mills are usually operating under nonsteady conditions, which makes it difficult to realize energy-saving regimes for heating the metal. Modern continuous furnaces are multi-zone units, and the prescribed temperature regime in each heated zone is maintained by controlling the consumption of fuel. From the standpoint of responsiveness and accuracy in obtaining the desired quality of heating and — in particular — reducing fuel consumption, the most promising approach is to instead control the temperature regime in the different heating zones on the basis of the temperature of the surface of the metal. The metal's surface temperature is most accurately measured using optical pyrometers installed in a side wall of the furnace. The article presents a block diagram showing how an energy-saving regime for heating continuous-cast semifinished products can be implemented in a modern continuous furnace on the basis of the temperature of the surface of the metal tsfc(τ). 相似文献
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分析了攀钢1450精轧变形抗力模型结构和相关的回归系数.根据现场的实测数据,发现模型中的问题与不足,提出了优化方法,完善变形抗力模型公式,满足了产品精度的需要;优化后的变形抗力预测精度得到了更高的精度. 相似文献
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