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船用低合金钢10CrNiMo感应快速加热时温度分布不均匀导致淬火后组织性能不均匀是其感应淬火工艺的难点。通过运用有限元方法模拟无预热采用单级线圈直接加热(方案一)和有预热改用两级线圈加热(方案二)2种工艺方案下移动低合金钢感应加热淬火的温度场。结果显示:方案二工艺条件下棒材出线圈时心部和表面的瞬时温差很小且温度场分布均匀。同时在方案二的工艺条件下进行感应加热淬火处理实验。实验结果显示:实验钢温度的实测值与模拟结果吻合性较好,其力学性能也满足服役条件。验证了有限元仿真的可行性,为船用低合金钢感应加热淬火处理提供了可靠的工艺参数。
Marine low alloy steel 10CrNiMo induction heating fast temperature uneven distribution of the microstructure after quenching caused by uneven performance of its induction hardening process difficult. By using the finite element method to simulate the non-preheating, the temperature field of the low-alloyed steel under induction heating and quenching under the two schemes of direct heating with single-stage coil (Scheme 1) and heating with two-stage coil with preheating (Scheme 2) The results show that the instantaneous temperature difference between the core and the surface of the bar under the second condition of the second scheme is small and the temperature field is evenly distributed. At the same time in the second process conditions for induction heating quenching experiments. The experimental results show that the measured temperature of the experimental steel is in good agreement with the simulation results and its mechanical properties also meet the service conditions. The feasibility of finite element simulation was verified, which provided reliable process parameters for induction hardening of low alloy steel for shipbuilding.