摘要
对Mn-10Cu4Cr合金进行850℃固溶40min和不同时效处理(400~600℃时效8h和440℃时效0~120h),研究了合金在时效后的组织结构演变和力学性能。结果表明,Mn-10Cu-4Cr合金经固溶处理后的基体TEM组织呈条纹状形貌,条纹宽度约为1.5nm,还存在无条纹形貌的富铜区,表明由于调幅分解的发生导致了合金成分的不均匀性。此外,组织中还含有α-Mn析出相,随着时效温度的增加或者时效时间的延长,合金的晶粒尺寸无明显变化,而强度和硬度明显增加,伸长率下降,其原因是时效处理导致了富铜纳米颗粒的形成、长大、粗化以及α-Mn相在晶粒内部以及晶粒之间析出。
Microstructure evolution and mechanical properties of Mn-10Cu-4Cr alloy after solution treatment at 850℃for 40 min and aging at 400-600℃for 8 h and at 440℃for 0-120 h were studied.The results show that the matrix of the alloy after solution treatment shows stripe morphology with width of about 1.5 nm under TEM,and there is a copper-rich region without stripe morphology,indicating that the occurrence of spinodal decomposition leads to the inhomogeneity of alloy composition.Moreover,there is alsoα-Mn precipitated phase in the microstructure.With the increase of aging temperature and the extension of aging time,the grain size of the alloy changes lttle,while the hardness and strength increase significantly and the elongation decreases,which is due to the formation,growth and coarsening of Cu-rich nanoparticles,and the formation of theα-Mn phase within and between grains caused by aging treatment.
作者
王文龙
孙立赢
刘硕
龙旦风
张华伟
殷福星
Wang Wenlong;Sun Liying;Liu Shuo;Long Danfeng;Zhang Huawei;Yin Fuxing(Zhanjiang Branch of CNO0C Ltd.,Zhanjiang Guangdong 524057,China;Institute of New Materials,Guangdong Academy of Sciences,Guangzhou Guangdong 510650,China;Tianjin Key Laboratory of Materials Laminating Fabrication and Interface Control Technology,School of Materials Science and Engineering,Hebei University of Technology,Tianjin 300130,China;Institute of Intelligent Manufacturing,Guangdong Academy of Sciences,Guangzhou Guangdong 510070,China)
出处
《金属热处理》
CAS
CSCD
北大核心
2024年第10期175-178,共4页
Heat Treatment of Metals
基金
广东省自然科学基金面上项目(2024A1515011287)。
