Open AccessExperimental Study of Recrystallization for C-Mn extruded Workpiece
Author(s) -
Yang Bao-jian,
Li Jiang,
Huijun Li,
Yonghua Zhong,
Jianhua Tang
Publication year - 2019
Publication title -
iop conference series. materials science and engineering
Language(s) - English
Resource type - Journals
eISSN - 1757-899X
pISSN - 1757-8981
DOI - 10.1088/1757-899x/562/1/012148
Subject(s) - recrystallization (geology) , materials science , nucleation , metallurgy , dynamic recrystallization , extrusion , composite material , hot working , microstructure , thermodynamics , geology , physics , paleontology
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 .