RAFM钢表面粉末包埋法制备低活性渗铝层工艺研究  

Study on Pack Cementation Process for Preparation of Low Activity Pack Aluminizing Layer on RAFM Steel

作　　者：袁晓明[1] 杨洪广[1] 赵崴巍[1] 占勤[1] 朱欣欣[1] 

机构地区：[1]中国原子能科学研究院,北京102413

出　　处：《材料导报（纳米与新材料专辑）》2015年第1期66-68,共3页

基　　金：国家磁约束核聚变能研究专项资助(2009GB109005)

摘　　要：采用粉末包埋法在中国低活性铁素体马氏体钢（RAFM）基底上制备了低活性渗铝层，利用扫描电镜（SEM）和能谱分析（EDS）对渗铝层的形貌和成分进行了分析。结果表明：低活性渗铝层表面铝含量（原子分数）约40％，主要由厚度为15-20μm的FeAl、Fe3-Al及α-Fe（Al）相组成，该渗铝层表面易发生烧结。为避免表面烧结，重点研究了渗铝温度对渗铝层表面形貌的影响，当温度较高（750℃）时，表面产生大量渗铝剂颗粒烧结；当温度较低（650℃）时，表面无烧结但渗铝层生长不完整且存在较多孔洞；700℃下表面无烧结且渗铝层致密完整。To avoid any potential detrimental effect on the substrate mechanical properties, a pack cementation process was developed to coat the China reduced activation ferritic/martensitic （RAFM） steel at temperatures below its tempering temperature （750 ℃）. The morphology and element depth profile of aluminide coating were charaeterized by SEM, EDS, etc.. The aluminide coating is about 15-20μm thick and mainly consisted of FeAl, Fe3Al and α-Fe（Al） phase. Besides, some embedded pack particles entrap on the surface of the coating. In order to avoid surface sintering, the effect of aluminizing temperature on the surface morphology was investigated between 650-750 ℃.

关 键 词：粉末包埋法 RAFM钢 渗铝层 表面烧结 渗铝温度 

分 类 号：TL34[核科学技术—核技术及应用]