基于数值模拟的20MnCr5钢齿轮渗碳淬火工艺优化

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Abstract： Aiming at the issue of significant energy consumption in the carburizing and quenching process，the process seting parameters of 2OMnCr5 steel gear were enhanced under the precondition of guaranteing the surface hardness.Byconducting an analysisof the coupling among temperature，structure，and hardness，the theoretical calculation model forcarburizingand quenching isestablished.Basedonthematerialcompositionof thegear，the JMatPro software was employed to calculate the material performance parameters. Several groups of simulation experiments were designed by orthogonal experiments，and the finite element software Deform was employed to simulate the process. Based on the simulated hardnessoutcomes， the range analysis was conducted respectively on carburizing temperature，carburizing time，quenching temperature，tempering temperature，and tempering time， and the influence of each parameter on the surface hardness was analyzed.The results indicated that the lower the quenching temperature was，the higher the surface hardnessof the gear would be.Compared with the original scheme，the ultimately selected process increased the surface hardness by 2.2HRC while reducing the production energy consumption.It can offer a reference for actual production.

Keywords： 2OMnCr5 steel; carburizing and quenching; finite element; orthogonal test; range analysis

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作为热处理工艺的一种，渗碳淬火是一个复杂耦合的工艺过程，工件内部随时会发生温度、组织及应力的变化，因此常规的测量手段很难准确及时反映工件全过程的变化，一般只能检测生产结束状态的结果。（剩余9965字）