稀有金属材料与工程
稀有金屬材料與工程
희유금속재료여공정
RARE METAL MATERIALS AND ENGINEERNG
2010年
3期
490-493
,共4页
史振学%李嘉荣%刘世忠%骆宇时%赵金乾
史振學%李嘉榮%劉世忠%駱宇時%趙金乾
사진학%리가영%류세충%락우시%조금건
Hf%DD6合金%单晶高温合金%铸态组织
Hf%DD6閤金%單晶高溫閤金%鑄態組織
Hf%DD6합금%단정고온합금%주태조직
Hf%DD6 alloy%single crystal superalloy%as-cast microstructure
采用OM,SEM及EDS等方法研究了不同Hf含量对DD6单晶高温合金铸态组织的影响.结果表明,增加Hf含量,DD6合金凝固组织一次枝晶间距先增加后减小;共晶含量增加;枝晶干的y'相无明显变化,枝晶间的y'相稍有减小;合金的显微疏松无明显改变,合金元素偏析程度略有减小;合金含有颜色深浅明显不同的两种碳化物.
採用OM,SEM及EDS等方法研究瞭不同Hf含量對DD6單晶高溫閤金鑄態組織的影響.結果錶明,增加Hf含量,DD6閤金凝固組織一次枝晶間距先增加後減小;共晶含量增加;枝晶榦的y'相無明顯變化,枝晶間的y'相稍有減小;閤金的顯微疏鬆無明顯改變,閤金元素偏析程度略有減小;閤金含有顏色深淺明顯不同的兩種碳化物.
채용OM,SEM급EDS등방법연구료불동Hf함량대DD6단정고온합금주태조직적영향.결과표명,증가Hf함량,DD6합금응고조직일차지정간거선증가후감소;공정함량증가;지정간적y'상무명현변화,지정간적y'상초유감소;합금적현미소송무명현개변,합금원소편석정도략유감소;합금함유안색심천명현불동적량충탄화물.
The effects of Hf content on the as-cast microstructures were investigated in DD6 single crystal superalloy by OM, SEM and EDS. The results show that with the Hf content increasing, primary dendrite arm spacing increases first and decreases afterwards, and the volume fraction of y/y' eutectic increases. The size of y' phase particles of dendritic core has no obvious change while that of interdendritic decreases a little. Microporosity has no apparent change and extent of elements segregation slightly decreases. There are two kinds of carbides with different color shades in alloys.
