Transactions of Materials and Heat Treatment

Title：Hot formability of steel 20CrMnTiH based on hot processing map and simulation on hot forming of helical gear

Authors： Qin Fei Feng Wei

Unit： Wuhan University of Technology Hubei Key Laboratory of Advanced Technology of Automotive Parts

KeyWords： steel 20CrMnTiH hot processing map helical gear precision forming FEM dynamic recrystallization

ClassificationCode：TG142.1

year,vol(issue):pagenumber：2017,42(3):137-143

Abstract：

According to the requirement of hot processing optimization for steel 20CrMnTiH, the hot processing maps were established under different strains based on the dynamic material model (DMM), and the influences of strain on the hot workability were explored. Then, the safe region and instable region were determined, and the optimal hot processing window also could be obtained. Furthermore, combining microstructural observation and FEM simulation of microstructure, the reliability of hot processing map and the accuracy of microstructural simulation were verified. At last, the coupled finite element model of helical gear was established by DEFORM3D, and the microdeformation evolution laws were simulated by the optimal deformation temperature and strain rate region obtained by hot processing maps, which provided the theoretical and technical foundations for the hot forming of helical gear.

Funds：

国家自然科学基金资助项目（51475344）；湖北省自然科学基金资助项目（2014CFB855）

秦飞（1992-），男，硕士研究生冯玮 (1973-)，女，博士，副教授

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