摘要
采用扫描电镜(SEM)、拉伸试验等手段研究了两相区退火温度对热轧态0.2C-8Mn-2Al钢微观组织与力学性能的影响。结果表明,退火态0.2C-8Mn-2Al钢组织主要为奥氏体和铁素体。在780~900℃区间内,随着退火温度的升高,拉伸前后0.2C-8Mn-2Al钢的奥氏体转变体积分数逐渐提高,0.2C-8Mn-2Al钢的抗拉强度、伸长率和强塑积先升高后降低。900℃退火的0.2C-8Mn-2Al钢的奥氏体转变体积分数最高,达到43.4%,840℃退火的0.2C-8Mn-2Al钢的抗拉强度、伸长率和强塑积均达到最大值,分别为1208.6 MPa、31.2%和37.71 GPa·%,840℃为热轧态0.2C-8Mn-2Al钢的最佳退火温度。
Effects of intercritical annealing temperature on the microstructure and mechanical properties of hot rolled 0.2C-8Mn-2Al steel were studied by using scanning electron microscope(SEM)and tensile testing.The results show that microstructure of the annealed O.2C-8Mn-2Al steel is mainly composed of austenite and ferrite.In the range of 780℃to 900℃,with the increase of annealing temperature,the volume fraction of austenite transformation in the 0.2C-8Mn-2Al steel before and after stretching gradually increases.Meanwhile,the tensile strength,elongation and product of strength and elongation of the O.2C-8Mn-2Al steel first increase and then decrease.The austenite transformation volume fraction of the 0.2C-8Mn-2Al steel annealed at 900 C is the highest,reaching 43.4%.The tensile strength,elongation and product of strength and elongation of the 0.2C-8Mn-2Al steel annealed at 840℃reach maximum values,which are 1208.6 MPa,31.2%and 37.71 CPa·%,respectively.840 C is the optimal annealing temperature for the hot rolled 0.2C-8Mn-2Al steel.
作者
曹中玉
贾华坡
赵保伟
Cao Zhongyu;Jia Huapo;Zhao Baowei(School of Mechanical Engineering,Zhengzhou University of Science and Technology,Zhengzhou Henan 450000,China;School of Mechanical and Electrical Engineering,Henan University of Technology,Zhengzhou Henan 450001,China)
出处
《金属热处理》
CAS
CSCD
北大核心
2024年第9期247-251,共5页
Heat Treatment of Metals
基金
河南省高等学校重点科研项目(24B460030)。
