20CrMnMo钢渗碳后端淬试验的硬度分析
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摘要
运用端淬曲线模型对渗碳端淬试样的硬度场进行了模拟分析,首先拟合出不同碳含量下的端淬硬度曲线,然后通过温度场的分析得到特定温度区间的冷却曲线,最终实现了渗碳端淬试样硬度的分层模拟和云图显示。通过与试验结果对比,硬度分析结果具有较好的准确性,尤其是在端淬距离较小时,其余位置最大误差在5. 6 HRC以内。
By using the end quenching curve model,the hardness field of carburized end quenching specimen is simulated and analyzed,first the end quenching hardness curve under different carbon content is fitted,then the cooling curve of specific temperature zone is obtained by the analysis of temperature field,and finally,the layered simulation and cloud map display of the hardness of carburized end quenching specimen are realized.Compared with actual quenching test results,the hardness analysis results have good accuracy,especially when the distance from the end of Jominy specimen is smaller,maximum error at the remaining positions of the specimen is within 5.6 HRC.
By using the end quenching curve model,the hardness field of carburized end quenching specimen is simulated and analyzed,first the end quenching hardness curve under different carbon content is fitted,then the cooling curve of specific temperature zone is obtained by the analysis of temperature field,and finally,the layered simulation and cloud map display of the hardness of carburized end quenching specimen are realized.Compared with actual quenching test results,the hardness analysis results have good accuracy,especially when the distance from the end of Jominy specimen is smaller,maximum error at the remaining positions of the specimen is within 5.6 HRC.
引文
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[2]牛山廷.淬火冷却过程三维有限元模拟及工艺参数优化的研究[D].济南:山东大学,2007.Niu Shanting.Research on 3D finite element simulation and parameter optimization for quenching processes[D].Jinan:Shandong University,2007.
[3]高金柱,王爱香,顾敏,等.常用高合金齿轮渗碳钢渗层淬透性对比研究[J].金属加工(热加工),2010(15):40-42.
[4]张星,唐进元.17CrNiMo6钢内齿圈渗碳仿真关键技术研究[J].金属热处理,2015,40(3):185-189.Zhang Xing,Tang Jinyuan.Key technology in carburizing process simulation for 17CrNiMo6 steel annular gear[J].Heat Treatment of Metals,2015,40(3):185-189.
[5]Kim D W,Cho Y G,Cho H H,et al.A numerical model for vacuum carburization of an automotive gear ring[J].Metals and Materials International,2011,17(6):885-890.
[6]Sugianto A,Narazaki M,Kogawara M.Distortion analysis of axial contraction of carburized-quenched helical gear[J].Journal of Materials Engineering and Performance,2010,19:194-206.
[7]Sugianto A,Narazaki M,Kogawara M,et al.Numerical simulation and experimental verification of carburizing-quenching process of SCr420Hsteel helical gear[J].Journal of Materials Processing Tech,2009,209(7):3597-3609.