摘要
采用OM、SEM和力学性能测试等方法,研究了不同温度和时间的等温退火处理对50μm厚的Inconel 625合金箔材组织和性能的影响。结果表明,在650℃和700℃等温退火过程中,箔材发生再结晶,晶粒尺寸显著减小,同时在晶界处析出大量的富Ti和Nb的碳化物。由于再结晶导致的细晶强化和碳化物诱发的析出强化的共同作用,箔材的强度和塑性显著提升,特别是在650℃等温退火48 h后,抗拉强度达到了1513 MPa,相比于未退火前增加了近90%,伸长率也增加了105%。但是试验箔材经700℃等温退火48 h后,再结晶晶粒长大,使得力学性能显著下降。箔材的拉伸伸长率与晶粒尺寸密切相关。
Effects of isothermal annealing treatment at different temperatures and time on microstructure and properties of 50μm thick Inconel 625 alloy foils were studied by means of OM,SEM and mechanical properties test.The results show that during isothermal annealing at 650℃ and 700℃,the foils recrystallize,the grain size decreases significantly,and a large number of Ti-and Nb-rich carbides are precipitated at the grain boundaries.Due to the combined effect of recrystallization-induced fine-grain strengthening and carbide-induced precipitation strengthening,the strength and plasticity of the foils are significantly improved,especially after isothermal annealing at 650℃ for 48 h,the tensile strength reaches 1513 MPa,which is nearly 90% higher than that of the unannealed foils,and elongation also is increased by 105%.However,after isothermal annealing at 700℃for 48 h,the recrystallized grains become coarser,resulting in a significant decrease in mechanical properties.The tensile elongation of the foils is closely related to the grain size.
作者
王方军
刘应龙
时瑶
万红
刘斌斌
Wang Fangjun;Liu Yinglong;Shi Yao;Wan Hong;Liu Binbin(Chongqing Materials Research Institute Co.,Ltd.,Chongqing 400707,China;National Instrument Functional Materials Engineering,Chongqing 400707,China;State Key Laboratory for Advanced Metals and Materials,University of Science and Technology Beijing,Beijing 100083,China)
出处
《金属热处理》
CAS
CSCD
北大核心
2022年第3期77-81,共5页
Heat Treatment of Metals
基金
国家重点研发计划(2018YFB2003901)
重庆市技术创新与应用发展专项(cstc2019jscx-fxydX0011)。
