采用CCT和TTT曲线预测感应淬火硬化层组织和硬度  

Forecast on microstructure and hardness of induction quenching hardened layer by CCT and TTT curves

作　　者：张鹏飞 杨柱 赵正阳[1] 叶金涛 张根元[1] Zhang Pengfei, Yang Zhu, Zhao Zhengyang, Ye Jintao, Zhang Genyuan(College of Mechanical and Electrical Engineering, Hohai University, Changzhou Jiangsu 213022, Chin)

机构地区：[1]河海大学机电工程学院

出　　处：《金属热处理》2018年第3期76-81,共6页Heat Treatment of Metals

摘　　要：基于不同奥氏体化温度和组织含量的45、40Cr和42Cr Mo钢的CCT和TTT曲线,建立了轴感应淬火过程物理模型,用于预测钢感应淬火淬硬层深度、组织及硬度。结果表明：CCT和TTT曲线物理模型的模拟结果相一致,并与Maynier模型的预测结果和轴感应淬火处理的实测结果相吻合。钢的奥氏体化温度、合金元素含量增加,则相应增加感应淬硬层深度,改变了轴径向的组织和硬度分布,钢中含碳量变化使感应淬火的具有相同主要组织含量位置的硬度波动,主要组织含量和相应硬度计算值的误差在0%~5%内波动,表明采用CCT和TTT曲线预测钢感应淬火淬硬层组织硬度具有普适性。Based on CCT and TTT curves of 45,40 Cr and 42 Cr Mo steels with different austenitizing temperature and microstructure content,the simulated physical model in induction quenching process were established to predict the depth,microstructure and hardness of induction hardened steel. The results show that the simulation results of the CCT and TTT curves are in agreement with the results of the prediction of the Maynier model and the measured results of the axial induction hardening treatment. The increasing of steel induction hardened layer depth and changing of the microstructure and hardness distribution along axial radial direction are dependent upon increasing austenitizing temperature and content of alloying element,the hardness fluctuation of the same main microstructure content in induction hardened layer is influenced by the change of carbon content in steel,the calculated value of main microstructure content and its corresponding hardness are waved from 0% to 5%,which means that the forecast of microstructure and hardness in induction hardened layer by using CCT and TTT curves is appropriate.

关 键 词：感应淬火 CCT曲线 TTT曲线 组织 硬度 

分 类 号：TB115[理学—数学] TG156.3[理学—应用数学]