摘要
以四种具有不同Al含量的Fe-19Mn-xAl-0.3Si-0.8C(x=3.5、6、8、11)热轧高锰轻质钢为研究对象,通过室温拉伸、XRD、金相检测和断口扫描等研究手段,研究Al元素对力学性能、显微组织、应变硬化行为以及断裂行为的影响。研究结果表明,随着Al含量的增加,铁素体含量增加、奥氏体晶粒尺寸减小、屈服强度和抗拉强度增加、伸长率和应变硬化能力下降,并呈现三个阶段的应变硬化特点。Al含量分别为3.5wt%、6wt%和8wt%时钢的断裂方式为韧性断裂,而Al含量为11wt%的钢呈韧性和准解理混合型断裂。
Four hot rolled high-Mn light-weight steels of Fe-19Mn-xAl-0. 3Si-0. 8C（ x = 3. 5,6,8,11） with different Al contents were investigated. The effect of Al element on mechanical properties,microstructure,strain hardening behavior and fracture behavior was analyzed by means of room temperature tensile test,XRD,metallography observation and fracture scanning,etc. The results show that with the increase of Al content,ferrite content increases,grain size of austenite decreases,yield strength and tensile strength increase,ductility and strain hardening capacity decrease,and the steels exhibit three-stage strain hardening characteristics. The 3. 5Al,6Al,8Al steels exhibit ductile fractures and the 11 Al steel exhibits a mixed fracture of ductility and quasi-cleavage.
出处
《金属热处理》
CAS
CSCD
北大核心
2016年第11期62-66,共5页
Heat Treatment of Metals
关键词
高锰轻质钢
显微组织
力学性能
应变硬化行为
断裂行为
high-Mn light-weight steels
microstructure
mechanical properties
strain hardening behavior
fracture behavior
