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
8期
1334-1338
,共5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
DD6单晶高温合金%Hf%持久性能
DD6單晶高溫閤金%Hf%持久性能
DD6단정고온합금%Hf%지구성능
DD6 single crystal superalloy%Hf%stress rupture properties
研究了Hf含量对DD6单晶高温合金热处理组织和持久性能的影响.结果表明,在本实验研究范围内,随着Hf含量的增加,热处理后合金残余共晶量增加,枝晶干的γ'相尺度无明显变化,枝晶间的γ'相尺度有所减小.在1100℃,140MPa条件下,随着Hf含量的增加,合金的持久寿命先升高后降低,持久延伸率先快速增加,然后慢速增加.讨论了不同Hf含量合金的显微组织与持久性能的关系.
研究瞭Hf含量對DD6單晶高溫閤金熱處理組織和持久性能的影響.結果錶明,在本實驗研究範圍內,隨著Hf含量的增加,熱處理後閤金殘餘共晶量增加,枝晶榦的γ'相呎度無明顯變化,枝晶間的γ'相呎度有所減小.在1100℃,140MPa條件下,隨著Hf含量的增加,閤金的持久壽命先升高後降低,持久延伸率先快速增加,然後慢速增加.討論瞭不同Hf含量閤金的顯微組織與持久性能的關繫.
연구료Hf함량대DD6단정고온합금열처리조직화지구성능적영향.결과표명,재본실험연구범위내,수착Hf함량적증가,열처리후합금잔여공정량증가,지정간적γ'상척도무명현변화,지정간적γ'상척도유소감소.재1100℃,140MPa조건하,수착Hf함량적증가,합금적지구수명선승고후강저,지구연신솔선쾌속증가,연후만속증가.토론료불동Hf함량합금적현미조직여지구성능적관계.
The effect of Hf content on the microstructures after heat treatment and stress rupture properties of DD6 single crystal superalloy was investigated. The results show that with increasing of Hf content in the range of current research, the residual γ/γ' eutectic increases apparently, the size of γ' particles in dendritic cores has no obvious change and that in interdendritic decreases after heat treatment. With the increase of Hf content, the stress rupture life increases at first and decreases afterwards, and the elongation displays fast increasing first, and slow rising afterwards at 1100 ℃, 140 MPa. At last the relationship between the microstructures and stress rupture properties of DD6 alloy with different Hf contents was discussed.
