J. Mater. Sci. Technol. ›› 2005, Vol. 21 ›› Issue (06): 803-806.

• 论文 • 上一篇    下一篇

Mathematical Model for Tempering Time Effect on Quenched Steel Based on Hollomon Parameter

宛农;熊惟皓;索进平   

  1. 华中科技大学材料科学与工程学院
  • 收稿日期:2004-12-15 修回日期:2005-03-09 出版日期:2005-11-28 发布日期:2009-10-10
  • 通讯作者: 宛农

Mathematical Model for Tempering Time Effect on Quenched Steel Based on Hollomon Parameter

Nong WAN, Weihao XIONG, Jinping SUO   

  1. State Key Laboratory of Die & Mould Technology, Huazhong University of Science and Technology, Wuhan 430074, China...
  • Received:2004-12-15 Revised:2005-03-09 Online:2005-11-28 Published:2009-10-10
  • Contact: Nong WAN

摘要: 基于状态函数特性和Holloman参数通用表达式,通过微分和积分运算推导出火钢回火时间效应模型,即不同温度下回火硬度与回火时间的关系.利用所建模型从理论上证明了回火硬度与回火时间的半对数关系,将不同回火时间下的硬度试验简化为不同温度下一小时回火硬度的测量.采用该模型对200~600℃温度回火的42CrMo 和T8Mn钢在不同时间下的回火硬度进行了计算,结果表明该模型计算值与试验值相符.

Abstract: Through the differentiating and integrating process, a mathematical model for tempering time effect on quenched steel was derived based on the attribute of state function and the general equation of Hollomon parameter, which correlates the tempering hardness with the tempering time at different tempering temperature. Using the established model, the linear relationship between the tempering hardness and the tempering time in logarithm was proved theoretically, and the tempering hardness for various tempering time was reduced to the measurement and calculation of a hardness experiment tempered for 1~h at different tempering temperatures. Moreover, the hardness of steel 42CrMo and T8Mn tempered for various times at 200~600℃ was calculated using this method. The predicted results are in good agreement with those of the available experiments.

Key words: Tempering, Time effect, Mathematical model, Hollomon parameter