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李洋,马立峰,姜正义,黄志权,林金宝,姬亚峰.AZ31镁合金中厚板轧制温度场的数值模拟与实验验证[J].稀有金属材料与工程(英文),2019,48(7):2185~2192.[Li Yang,Ma Lifeng,Jiang Zhengyi,Huang Zhiquan,Lin Jinbao and Ji Yafeng.Numerical Simulation and Experimental Verification of Temperature Field in Medium Plate Rolling of AZ31 Magnesium Alloy[J].Rare Metal Materials and Engineering,2019,48(7):2185~2192.]
Numerical Simulation and Experimental Verification of Temperature Field in Medium Plate Rolling of AZ31 Magnesium Alloy
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Received:June 06, 2018  Revised:June 27, 2018
DOI:
Key words: AZ31 magnesium alloy  plastic deformation heat  isothermal rolling  rolling process
Foundation item:国家自然科学基金资助项目(U1610253;51604181);山西省重点研发计划(201603D111004;201603D121010);山西省自然科学基金(201601D011012)。
Author NameAffiliation
Li Yang,Ma Lifeng,Jiang Zhengyi,Huang Zhiquan,Lin Jinbao and Ji Yafeng  
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Abstract:
      The temperature distribution of the AZ31 magnesium alloy in the rolling deformation zone was analyzed by numerical simulation. The empirical formula of the average temperature of the magnesium plate after rolling with respect to the roll temperature, the rolling velocities, the rolling reduction rate, and the thickness of the plate was established and supplemented with corresponding experiments. verification. The results show that when the magnesium plate is thin and the rolling velocity is small, the plastic deformation heat of the center layer of the magnesium plate is transferred to the surface in the rolling deformation zone. The temperature rise of the center layer cannot represent the temperature rise caused by the deformation of the magnesium plate. The average temperature of the magnesium plate after rolling is positively related to the roll temperature, rolling velocity and rolling reduction rate, and inversely related to the sheet thickness. The maximum relative error between the calculated and experimental values of the formula is 8.34%, and the average relative error is 7.4%. The formula can well predict the average temperature of the magnesium plate after rolling. The proposed empirical formula for magnesium plate temperature prediction is conducive to the realization of "isothermal rolling" control of AZ31 magnesium alloy sheet; it is of guiding significance for the reasonable formulation of magnesium alloy rolling process system and the selection of subsequent rolling equipment