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In this study, two distinct quenching processes for large-scale gears fabricated from G35CrNiMo steel during induction hardening were experimentally and numerically investigated. The temperature profiles at various depths, the additional strain accumulation due to temperature gradient alterations, and the transient stress distributions during quenching were meticulously examined to evaluate the efficacy of these processes. The results conclusively demonstrated that the optimized quenching process, entailing gas quenching followed by water quenching, is eminently more suitable for large gears. The relationships among residual stress, micro-hardness, and microstructure at different depths were comprehensively discussed. Notably, the residual stresses obtained through simulation exhibited a remarkable concordance with the experimental data.

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G35CrNiMo Steel Large Gear Quenching Process: Optimization Strategy and Influence on Microstructure and Properties

  • 会议论文

  • 发表日期：

    2025年

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  • Sheng Song

摘要

In this study, two distinct quenching processes for large-scale gears fabricated from G35CrNiMo steel during induction hardening were experimentally and numerically investigated. The temperature profiles at various depths, the additional strain accumulation due to temperature gradient alterations, and the transient stress distributions during quenching were meticulously examined to evaluate the efficacy of these processes. The results conclusively demonstrated that the optimized quenching process, entailing gas quenching followed by water quenching, is eminently more suitable for large gears. The relationships among residual stress, micro-hardness, and microstructure at different depths were comprehensively discussed. Notably, the residual stresses obtained through simulation exhibited a remarkable concordance with the experimental data.