Abstract：In this paper, 18CrNiMo7-6 gear steel is used as the object, through the finite element method, the temperature field, phase transformation field, and stress field of high temperature carburizing and quenching of Navy-C type specimens are simulated, and the deformation law of high temperature carburizing and quenching is studied. The results show that the established multi-field coupled finite element model can more accurately simulate the deformation law of high temperature carburizing and quenching by comparing the simulation and measured deformation results; the thermal stress and martensitic transformation stress during carburizing and quenching of Navy-C type specimens. The interaction causes the C-shaped gap opening displacement to show a trend of first increasing, then decreasing and then increasing. When the martensite content in the central part is 50%, the gap opening displacement is the smallest.
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2021, Vol. 28 