摘要
利用光学显微镜、扫描电镜、电子万能拉伸机和EBSD、XRD分析技术研究了中锰TRIP钢热轧后不同退火温度对组织和性能的影响。结果表明,经过热轧后,组织中有δ-铁素体条带、马氏体和残留奥氏体。当退火温度从600℃增加到900℃时,屈服强度由610.3 MPa下降到496.7 MPa,抗拉强度从757.3 MPa下降至630.4 MPa。热轧试验钢在700℃退火时伸长率最大,为44.9%。从整体上看,当热轧试验钢在700℃退火后综合力学性能最优,强塑积最高,为33.8 GPa·%。
Effects of different annealing temperatures on the microstructure and properties of hot rolled medium manganese TRIP steel were investigated by means of optical microscope,scanning electron microscope,electronic universal drawing machine,EBSD and XRD analysis.The results show that the hot rolled microstructure of the steel isδ-ferrite strips,martensite and retained austenite.When the annealing temperature increases from 600℃to 900℃,the yield strength decreases from 610.3 MPa to 496.7 MPa,and the tensile strength decreases from 757.3 MPa to 630.4 MPa,while at 700℃the maximum elongation(44.9%)can be obtained.On the whole,when the hot rolled tested steel is annealed at 700℃,the comprehensive mechanical properties are the best and the strength-elongation product is the highest,which is 33.8 GPa·%.
作者
张馨月
冯运莉
曹阔
Zhang Xinyue;Feng Yunli;Cao Kuo(College of Metallurgy and Energy,North China University of Science and Technology,Tangshan Hebei 063210,China)
出处
《金属热处理》
CAS
CSCD
北大核心
2020年第7期23-27,共5页
Heat Treatment of Metals
基金
国家自然科学基金(51674123)
河北省自然科学基金(E2017209237)。
关键词
中锰TRIP钢
热轧
退火
组织
力学性能
medium manganese TRIP steel
hot rolling
annealing
microstructure
mechanical properties
