摘要
研究采用光学显微镜(OM)、扫描电镜(SEM)、能谱分析(EDS)和透射电镜(TEM)等试验技术,分别对2205双相不锈钢在700、750℃时效处理0.5、12、h后组织中的析出相进行分析。结果表明:在700℃时效处理的条件下,2205双相不锈钢的析出相主要是Cr2N和χ相;750℃时效处理的条件下,析出相主要由Cr2N、χ相以及σ相组成。结合室温冲击功的测量结果,随着时效时间的延长,该钢的冲击功明显降低;在相同时效时间条件下,与700℃时效处理相比,经750℃时效处理后的2205双相不锈钢冲击功较低,这主要是由于组织中σ相的析出造成的。
A serial aging treatments of 2205 duplex stainless steel（DSS） at the temperature of 700℃ and 750 ℃ for different time intervals （0.5,1,2 h） were carried out. Aided by optical metallography, SEM＆EDS and TEM analysis, the evolution of precipitation in 2205 DSS during aging treatment was determined. The results show that the main type of precipitation in 2205 DSS are Cr2N, X phase at 700℃ aging and Cr2N, χ and o phase at 750℃ aging. The impact toughness experimental results show that the impact energy of 2205 DSS decreases with prolonged keeping time; in addition, the impact energy of 2205 DSS at 750℃ aging is lower than that at 700℃ aging due to the o phase precipitated in microstructure of 2205 DSS.
出处
《钢铁》
CAS
CSCD
北大核心
2010年第6期84-87,101,共5页
Iron and Steel
基金
国家自然科学基金资助项目(50671061)
宝钢基金及上海市教委优秀青年教师科研专项基金资助(shu05004)
关键词
2205双相不锈钢
时效
析出相
冲击性能
2205 duplex stainless steel （DSS）
aging treatment
precipitation phase
impact property
