Hf对IC10高温合金凝固特性的影响  

Effect of Hf on Solidification Characterization of IC10 Superalloy

作　　者：王艳丽[1] 赵希宏[1] 范映伟[2] 黄朝晖[1] 王祺[2] 

机构地区：[1]北京航空材料研究院先进高温结构材料重点实验室,北京100095 [2]北京航空材料研究院,北京100095

出　　处：《航空材料学报》2012年第6期50-55,共6页Journal of Aeronautical Materials

摘　　要：采用等温凝固和差热分析相结合的方法,研究Hf含量对定向凝固柱晶IC10高温合金凝固特性的影响,得到Hf含量变化时合金在不同温度的凝固组织和凝固顺序。结果表明:随着Hf含量增加,合金的液相线及固相线温度均降低,凝固温度范围扩大,γ+γ'共晶析出温度提高。增加Hf含量还缩小了枝晶间丧失补缩能力温度与固相线温度的温度范围,并降低枝晶间液池保持连通时所需的最小液体量,提高IC10合金的铸造性能。The effect of hafnium on the solidification characterization of IC10 superalloy was studied by the method of DSC and isother- mal solidification experiment. The solidified structure at different temperature and solidification sequence were obtained. It is found that with the increasing hafnium content,temperatures of liquidus and solidus decrease, in the same time, the solidification range of the al- loy and the temperature of euteetie increase . Hafnium narrowed down the temperature range between the lost of interdendritie capillary feeding action and solidus, as well as decreased the liquid content necessary for linking the interdendritie pools in the late solidifica- tion. The Hf-rich melts in interdendritic zone had superior fluidity. So the increasing of hafnium content increased the castability of IC10 superalloy.

关 键 词：高温合金 定向凝固 HF 微观组织 

分 类 号：TG132.32[一般工业技术—材料科学与工程]