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。
The temperature distribution of the marine low-alloy steel 10CrNiMo is uneven by rapid induction heat-ing.As a result,microstructure and mechanical properties also appear uneven.Therefore,two different process schemes during induction quenching,single coil without preheating (scheme one)and using two-stage coil (scheme two),were studied and simulated by the finite-element analysis.It was found that the temperature distribution in bar appears homogeneity by scheme two process.And the experimental results comparing with the simulated nu-merical results show that the feasibility of finite element simulation is verified,and reliable technical parameters are provided for marine low-alloy steel induction heating quenching process.
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