工程科学学报2016，Vol.38Issue(1)：77-86,10.DOI:10.13374/j.issn2095-9389.2016.01.011
Cr-Co-Mo-Ni齿轮钢的热变形行为及模锻工艺的有限元模拟
Hot deformation behavior of Cr-Co-Mo-Ni gear steel and finite element simulation of the die forging process
摘要
Abstract
Large strain isothermal compression tests were carried out on a Gleeble-3800 thermal simulator to study the high temperature deformation behavior of Cr-Co-Mo-Ni gear steel.The constitutive equation and hot processing map of the steel were established based on experiment data.The results show that the flow stress decreases with increasing temperature,but increases with increasing strain rate.The flow stress can be described by the constitutive equation in a hyperbolic sine function and the averaged value of activation energy is 487.21 kJ·mol-1.The proper hot working regions shown by the hot processing map are the temperature of 1000-1100 ℃ and the strain rate of 0.1-1 s-1.In addition,the forging processes were simulated by finite element method based on the experiment,the effects of initial forging temperature and passes on the temperature and strain rate of forgings were analyzed,and the proper forging process parameters were obtained which are the initial forging temperature of 1000-1100 ℃ and the forging passes of 15.关键词
齿轮钢/本构方程/热加工图/模锻/有限元法Key words
gear steel/constitutive equations/hot processing maps/die forging/finite element method分类
矿业与冶金引用本文复制引用
唐海燕,杨卯生,孟文佳,李京社..Cr-Co-Mo-Ni齿轮钢的热变形行为及模锻工艺的有限元模拟[J].工程科学学报,2016,38(1):77-86,10.基金项目
国家高技术研究与发展计划资助项目(2012AA03A503) （2012AA03A503）
钢铁冶金新技术国家重点实验室自主研发基金资助项目(41603014) （41603014）
