工程科学学报2016，Vol.38Issue(7)：967-972,6.DOI:10.13374/j.issn2095-9389.2016.07.011
齿轮钢SAE8620 H高温变形行为及热加工图
High temperature deformation behavior and processing maps of SAE8620 H gear steel
摘要
Abstract
The high temperature deformation behavior of SAE8620H gear steel in a temperature range of 950 to 1100℃ and a strain rate range of 0. 01 to 10 s-1 was studied by high temperature compression tests. The flow stress of the steel has steady state char-acteristics. The flow stress decreases with the increase of deformation temperature and the decrease of strain rate. The constitutive e-quation of the steel can be described by a hyperbolic sine equation. Based on the related data of peak stress, strain rate and tempera-ture, the hot deformation activation energy of the steel was deduced to be about 280359. 9 J·mol-1 . The processing maps were drawn according to 40% and 60% deformation. The forming parameters can be determined by the processing maps. Low strain rate should be used for small deformation, while high strain rate and high forming temperature or low strain rate and low forming temperature should be used for large deformation.关键词
齿轮钢/高温/变形/流变应力/本构方程/热加工图Key words
gear steel/high temperature/deformation/flow stress/constitutive equations/processing maps分类
矿业与冶金引用本文复制引用
朱小星,王宝雨..齿轮钢SAE8620 H高温变形行为及热加工图[J].工程科学学报,2016,38(7):967-972,6.基金项目
国家自然科学基金资助项目(51375042) （51375042）
现代交通金属材料与加工技术北京实验室经费资助项目 （）
