摘要
采用SEM、TEM、XRD、室温拉伸等手段,研究了0.1C-7.2Mn钢两相区温轧淬火配分处理钢的组织形貌、碳化物析出、残留奥氏体体积分数及其中的C含量及力学性能。结果表明,随着温轧压下率的增大,两相区温轧淬火配分处理后试样的马氏体板条得到细化并逐渐平行于轧制方向;两相区温轧淬火配分处理后试样的显微组织由马氏体和残留奥氏体组成,并且有碳化物析出;随着温轧压下率的增大,碳化物的平均尺寸粗化,残留奥氏体的体积分数逐渐升高,并且残留奥氏体中的C含量先升高后降低,屈服强度和抗拉强度均先升高后降低,伸长率先降低后升高。当温轧压下率为80%时,强塑积达到最高31.50 GPa·%。
Microstructure,carbide precipitation,volume fraction of retained austenite and C content,and mechanical properties of 0.1 C-7.2 Mn steel with intercritical warm-rolling quenching and partitioning treatment were studied by means of SEM,TEM,XRD and room temperature tensile test.The results show that the martensite lath of specimen after quenching and partitioning by intercritical warm-rolling is refined and parallel to the rolling direction gradually with the increase of warm-rolling reduction ratio.The microstructure of the specimen is composed of martensite and retained austenite,and carbides are precipitated after intercritical warm-rolling quenching and partitioning treatment.With the increase of warm-rolling reduction ratio,the average size of carbide coarsens,the volume fraction of retained austenite gradually increases,and the C content in retained austenite,the yield strength and tensile strength first increase and then decrease,but the elongation decreases first and then increases.When the reduction ratio of warm-rolling is 80%,the product of strength and elongation reaches the maximum of 31.50 GPa·%.
作者
陈连生
房宁
曹仲乾
杨子旋
李红斌
潘红波
田亚强
Chen Liansheng;Fang Ning;Cao Zhongqian;Yang Zixuan;Li Hongbin;Pan Hongbo;Tian Yaqiang(Key Laboratory of the Ministry of Education for Modern Metallurgy Technology,North China University of Science and Technology,Tangshan Hebei 063210,China;Key Laboratory of Impact and Safety Engineering,Ministry of Education of China,Ningbo University,Ningbo Zhejiang 315211,China;Key Laboratory of Metallurgical Emission Reduction and Resources Recycling of Ministry of Education,Anhui University of Technology,Ma'anshan Anhui 243002,China)
出处
《金属热处理》
CAS
CSCD
北大核心
2022年第3期28-33,共6页
Heat Treatment of Metals
基金
国家自然科学基金(51801106,U1860105)
河北省钢铁联合基金(E2020209124)
河北省高等学校科学技术研究项目(QN2019051,ZD2019064)。
关键词
中锰钢
两相区温轧
压下率
残留奥氏体
强塑积
medium-manganese steel
intercritical warm-rolling
reduction ratio
retained austenite
product of strength and elongation
