成分波动对17CrNiMo6齿轮钢渗碳速率及硬度的影响

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Abstract：Based on the compositional fluctuation characteristics in the mass production of 17CrNiMo6 gear steel forgings.Through Deform-3D multi physics coupling simulation，the influence mechanism of alloy compositional fluctuation oncarburizing rate and hardness distribution is revealed.Research has shown that the sensitivity of carbondiffusioncoefficienttocompositionalfluctuations is significantlyhigher than thatoftransfercoefficient，and compositional diferences only have a significant impact inthe early stages of heating and carburizing; The carbon flux during the initial stageofcarburization shows a negative correlation with the initial carbon content，and he carburization rate of the lowerlimit sample is higher than that of the upper limit sample; The carbonconcentration gradient in therootregion is higher than thatin the tooth profile，but itsspatial differences arenot significantly corelated with component fluctuations;The consistencyof surface hardnessis dominated by thecarburizing process， whilethe diference incorehardnessisdirectlycontrolled bycompositional fluctuations;Thegradientof toothroot hardnessis higher than thatof tooth profile，but its formation mechanism is independentof component fluctuations.

Keywords：component fluctuation;17CrNiMo6 steel; gear; carburizing rate;hardness

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随着现代制造业的飞速发展，对齿轮在高精、高速、重载及高可靠性方面的要求日益提高，这对制造工艺的稳定性与过程控制造成严峻挑战。（剩余11815字）