Experimental Study of Recrystallization for C-Mn extruded Workpiece

7th Annual International Conference on Materials Science and Engineering

Yang, Baojian^1 ; Jiang, Li^1 ; Li, Huijun^2 ; Zhong, Yonghua^1 ; Tang, Jianhua^1

Department of Intelligent Manufacturing, Wuyi University, Jiangmen, China^1

Department of Engineering, Wolongong Univeristy, Australia^2

关键词: Experimental scheme;    Heating temperatures;    Heating treatments;    Metallographic structure;    Recovery temperature;    Temperature constant;    Temperature rising;    Ultra-fine-grained;   

Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/562/1/012148/pdf
DOI  :  10.1088/1757-899X/562/1/012148

来源: IOP

【 摘 要 】

Recrystallization is a key step while conducting the composite process of severe extruding and heating treatment for fabricating the ultrafine-grained parts, howerer, the heating temperature palys a vital role that it directly effects the metallographic structure of extruded workpiece. In order to reveal the effects of heating temperature on metallographic structure of the extruded workpieces,three kinds of samples with different reduction ratio were put into the heating furnace when the temperature in frunace is over the recovery temperature of C-Mn extruded workpiece(about 450 °C), that is to shorten the temperature-rising time,thus the nucleation rate was increased simultaneously by doing so. During the heating process, the time-constant & temperature-varying together with time-varying & temperature-constant experimental scheme were adopted for different samples. Finally by measuring the hardness and analyzing the micro structures of C-Mn extruded workpiece, it can be concluded that fully recrystallization occurs in No.3 extruded workpiece with the condition of heating for 1 hour at 580 °C and cooled in the furnace, its average size is about 1 um.