Fe-2.0Cu合金连续冷却过程中Cu的析出行为  

Precipitation behavior of Cu in Fe-2.0Cu alloy during continuous cooling process

作　　者：李闯[1] 王学敏[1] 尚成嘉[1] 郑长安[1] 贺信莱[1] 

机构地区：[1]北京科技大学材料科学与工程学院,北京100083

出　　处：《金属热处理》2009年第6期33-37,共5页Heat Treatment of Metals

基　　金：国家自然科学基金项目(50471089)

摘　　要：利用光学显微镜及高分辨透射电镜研究了Fe-2.0Cu合金连续冷却过程中的微观组织与沉淀析出,分析了不同冷速对沉淀析出的影响、硬度与组织及析出物三者之间的关系。结果表明,Fe-2.0Cu合金在连续冷却过程中,大量析出物以相间沉淀方式析出,随着冷却速度的增大析出物逐渐减少,对材料形成更强的强化作用。经过透射电镜能谱和衍射分析,确定析出物为富铜过渡相,这种富铜过渡相所形成的G.P区对合金起强化作用。The microstructure and precipitation of Fe-2.0Cu alloy during continuous cooling process were studied by optical microscope and HREM. The influence of cooling rate on precipitation and the relation among the hardness, microstructure and precipitates were also investigated. The results show that the cooling rate contributes to the precipitation; most of precipitates are inter-phase precipitates in the process of continuous cooling. With the cooling rate increasing, the quantity of precipitates is decreasing gradually. When cooled at a certain rate,the effect of strength is the maximal. EDS and electron diffraction are employed to ascertain the precipitates are copper-rich transition phase, the copper-rich G. P zone is the main cause to strengthen the alloy.

关 键 词：Fe-2.0Cu合金 连续冷却 相间沉淀 G.P区 

分 类 号：TG142.1[一般工业技术—材料科学与工程]