Effect of Rolling Schedule on Section Inhomogeneity of Heavy Plate Microalloyed with VN
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摘要: 在厚板轧制过程中,由于板厚所引起的由表面到心部变形不均匀,将导致组织与力学性能沿厚度方向上有较大差异,最终影响钢板的整体质量。因此合理选择控轧工艺对于厚板生产至关重要。该研究采用有限元方式模拟了50 mm厚板的轧制过程,得出了不同轧制条件下的厚板截面不同位置的变形情况。同时结合Gleeble热模拟实验,研究了不同控轧工艺对VN微合金化50 mm厚钢板截面效应的影响。结果表明,对于VN微合金化厚板,870℃终轧并保温可得到最佳的截面均匀性。Abstract: During hot rolling of heavy plate,deformation inhomogeneity along the thickness direction will lead to the inhomogeneity of microstructure and mechanical properties.Therefore it is very important to choose a suitable rolling schedule.To investigate the effect of rolling schedule on the microstructure and mechanical properties of plate,finite element method (FEM) was used to simulate the rolling process of 50 mm thick plate.And the deformation at different position of the plate was obtained.Combining the simulation results with Gleeble physical simulation,the effect of rolling schedule on the section effect of VN microalloyed heavy plate was studied.The results indicate that the best section homogeneity can be obtained when the plate was given heat preservation after final rolled at 870℃.
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Key words:
- heavy plate /
- controlled rolling /
- Section effect /
- FEM /
- VN microalloying
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