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Research on Quenching of 65Mn Friction Plates in Internal-Circulation Water Channel Molds Based on Finite Element
Yu Wang1,2, Ziheng Zhao1, Jingang Liu1
1School of Mechanical Engineering and Mechanics, Xiangtan University, Xiangtan 411105, China.
None:
To address uneven surface hardness distribution in 65Mn external tooth friction plates after furnace quenching and disc mold tempering, we adopted an integrated quenching and forming process, using an internal-circulation mold. By simultaneously implementing pressure forming and quenching within the internal-circulation mold, the hardness uniformity of the friction plate during forming was improved, effectively suppressing warping deformation. A multi-field coupled model of the friction plate quenching in the internal-circulation mold was established to simulate the dynamic evolution of the temperature field, the microstructural transformation, and the stress field, thus obtaining the complete heat treatment response of the martensitic transformation. The experimentally observed microstructure agreed well with the simulation results. Data analysis showed that after quenching in the internal-circulation mold, the surface hardness difference of a single friction plate was reduced from 3 HRC to 0.9 HRC, and the end face runout decreased from 0.1-0.15 mm to no more than 0.06 mm, significantly improving the product's dimensional accuracy and performance consistency.
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