Microstructure Evolution and Dynamic Recrystallization Behavior of Hot Deformed AerMet100 Steel

Wang Xin; Dong Hongbo; Zou Zhongbo; Wang Mingzhu

doi:10.15980/j.tzzz.2016.02.003

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Microstructure Evolution and Dynamic Recrystallization Behavior of Hot Deformed AerMet100 Steel
Vol. 36, Issue 2, Pages: 121-125(2016)
Published： 2016 ，
DOI： 10.15980/j.tzzz.2016.02.003

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[1]王鑫,董洪波,邹忠波,王明主.AerMet100钢的热变形显微组织演变及动态再结晶行为[J].特种铸造及有色合金,2016,36(02):121-125.

Wang Xin, Dong Hongbo, Zou Zhongbo, et al. Microstructure Evolution and Dynamic Recrystallization Behavior of Hot Deformed AerMet100 Steel. [J]. Special Casting & Nonferrous Alloys 36(2):121-125(2016)
[1]王鑫,董洪波,邹忠波,王明主.AerMet100钢的热变形显微组织演变及动态再结晶行为[J].特种铸造及有色合金,2016,36(02):121-125. DOI： 10.15980/j.tzzz.2016.02.003.

Wang Xin, Dong Hongbo, Zou Zhongbo, et al. Microstructure Evolution and Dynamic Recrystallization Behavior of Hot Deformed AerMet100 Steel. [J]. Special Casting & Nonferrous Alloys 36(2):121-125(2016) DOI： 10.15980/j.tzzz.2016.02.003.

摘要

采用Gleeble-3500热模拟试验机对超高强度钢AerMet100进行热压缩试验

研究其在变形温度为850

150℃和应变速率为0.01

-1

条件下的动态再结晶行为。结果表明

通过分析应力-应变曲线的特征及金相观察

可知AerMet100钢在不同变形条件下呈现出加工硬化、动态回复及动态再结晶特征

且变形温度的升高与应变速率的降低均有利于发生动态再结晶。通过对热变形试验数据的分析计算

建立了高温变形本构关系

动态再结晶临界应变模型和动态再结晶体积分数模型。利用所建立模型对动态再结晶行为进行预测

得到变形温度的下降及应变速率的增加会推迟动态再结晶发生。

Abstract

The dynamic recrystallization（DRX）behavior of ultra-high strength AerMet100 steel during hot compression test was simulated at 850

150 ℃ and 0.01

-1

on a Gleeble-3500 thermo-mechanical simulator.The results show that the AerMet100 steel shows a working hardening

dynamic recovery（DRV）and dynamic recrystallization（DRX）behavior

respectively

under different deformation conditions.Meanwhile

the increase of temperature and the decrease of strain rate are beneficial to dynamic recrystallization.The constitutive relation

DRX critical strain model and DRX kinetics model were established by analysis of the experimental data of hot deformation.The DRX kinetics model predicts that the decrease of deformation temperature and the increase of strain rate can postpone occurrence of DRX.