组织对含铜钢中析出行为的影响  

Influence of microstructure on precipitation of steel bearing copper

作　　者：李闯[1] 王学敏[1] 尚成嘉[1] 吴辉[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：《材料科学与工艺》2011年第4期6-10,共5页Materials Science and Technology

基　　金：国家科技研究发展计划资助项目(2008AA03Z501)

摘　　要：为研究含铜钢在连续冷却过程中的析出行为,采用不同冷却速度及中间淬火温度获得不同的金相组织.利用金相显微镜和透射电镜研究不同组织对析出的影响.实验结果表明:当冷却后组织为铁素体时,随着铁素体的产生,在铁素体内产生第二相析出颗粒,当冷却产物为贝氏体及马氏体时,并未观察到第二相析出.当相变后产物为多种组织时,仅在铁素体中发现第二相析出颗粒.第二相颗粒为富铜相,以相间沉淀方式析出.To investigate the precipitation behavior of Cu-bearing steels during continuous cooling,different microstructure resulting from different cooling rates and temperature of interrupted cooling and quenching was obtained.The optical microscope and TEM were employed to study the influence of microstructure on the precipitation process.The results show that when the microstructure is ferrite the second-phase precipitates occurs.However there are no obvious precipitates in bainite and martensite.When the microstructure is complex,the precipitates are observed in the ferrite only.The second-phase precipitates are copper-rich particles which are formed by the way of inter-phase precipitation.

关 键 词：连续冷却 中间淬火 铁素体 贝氏体 马氏体 相间沉淀 

分 类 号：TG142.1[一般工业技术—材料科学与工程]