NUMERICAL SIMULATION OF THE THERMO-MECHANICAL PROCESS FOR BEAM BLANK CONTINUOUS CASTING

金属学报(英文版), 2007, 20(4): 241-250.

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1.Key Laboratory of Metastable Materials Science and Technology, College of Materials Science and Engineering, Yanshan University, Qinhuangdao 066004, China;College of Metallurgy and Energy Engineering, Hebei Polytechnic University,Tangshan 063009, China

2.College of Metallurgy and Energy Engineering, Hebei Polytechnic University,Tangshan 063009, China

3.College of Metallurgy and Energy Engineering, Hebei Polytechnic University,Tangshan 063009, China

4.College of Metallurgy and Energy Engineering, Hebei Polytechnic University,Tangshan 063009, China

5.Tangshan Heavy Plate Co. Ltd., Tangshan 063610, China

6.Hebei Jinxi Steel Stock Co. Ltd, Tangshan 064302, China

7.College of Mechanical Engineering, Yanshan University, Qinhuangdao 066004, China

基金项目: 河北省自然科学基金(E2007000591)

NUMERICAL SIMULATION OF THE THERMO-MECHANICAL PROCESS FOR BEAM BLANK CONTINUOUS CASTING

Keywords： beam blank

The aim of this study was to simulate the solidification process of beam blank continuous casting,and then find the reasons for the typical defects of the beam blank. A two-dimensional transient coupled finite element model has been developed to compute the temperature and stress profile in beam blank continuous casting. The enthalpy method was used in the heat conduction equation.The thermo-mechanical property in the mushy zone was taken into consideration in this calculation.It is shown that at the mold exit the thickness of the shell had its maximum value at the flange tip and its minimum value at the fillet. The temperature had a great fluctuation on the surface of the beam blank in the secondary cooling zone. At the unbending point, the surface temperature of the web was in the brittleness temperature range under the present condition. To ensure the quality, it is necessary to weaken the intensity of secondary cooling. At the mold exit the equivalent stress and strain have higher values at the flange tip and at the web. From the spray 1 to the unbending point, the maximum values of stress and strain gradually moved to the internal section of the flange tip and the web. However, whenever, there were bigger stress and strain values near the flange tip and the web than in the other parts, it must be very easy to generate cracks at those positions. Now, online verification of this simulation has been developed, which has proved to be very useful and efficient to instruct the practical production of beam blank continuous casting.

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NUMERICAL SIMULATION OF THE THERMO-MECHANICAL PROCESS FOR BEAM BLANK CONTINUOUS CASTING

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