重载齿轮轴感应淬火技术研究应用

Research and Application of Induction Hardening Technology for Heavy Duty Gear Shafts

通过对重载齿轮轴进行渗碳、调质及感应淬火试验研究,分析讨论了不同电流频率感应淬火对齿轮轴表面硬度、齿根硬度、齿心部硬度、硬度梯度、金相组织的影响。研究表明,18Cr2Ni4WA钢齿轮轴渗碳、调质加感应淬火,可以有效提高工件表面硬度至58 HRC以上,并整体提高淬硬层硬度梯度值,改善硬化层的金相组织;同时,确保齿心部硬度最佳,提高齿轮轴的弯曲疲劳强度。对含有较多Cr、Ni、W、Mo等低碳合金钢齿轮材料,提供了可提高产品质量的一种热处理工艺方法。

The effects of induction quenching with different current frequency on the surface hardness,tooth root hardness,tooth core hardness,hardness gradient and metallography of gear shafts are analyzed anddiscussed by carburizing,tempering and induction quenching experiments of heavy-duty gear shafts. The re-sults show that carburizing,quenching and tempering and induction quenching of 18Cr2Ni4 WA steel gearshafts can effectively improve the surface hardness of the workpiece to more than 58 HRC,and improve thehardness gradient value of hardened layer. Improve the metallographic structure of hardened layer,and ensurethe best hardness of the tooth core,so as to increase the bending fatigue strength of gear shafts. Therefore,aheat treatment method is provided for the low carbon alloy steel gear material containing more Cr,Ni,W andMo after carburizing,which can improve the product quality.