熔体超温处理温度对新型镍基单晶高温合金溶质分配行为的影响
发布时间：2018-10-14 20:06
【摘要】：采用熔体超温处理技术对新型含Re和Ru的镍基单晶高温合金熔体进行不同温度的超温处理,利用EPMA研究了定向凝固过程中合金元素的溶质分布状态及溶质分配系数随熔体超温处理温度变化的演化规律.结果表明,在平界面定向凝固条件下,随熔体超温处理温度的升高,Al,Ta元素在固液界面前沿液相一侧的分布呈现先增大后减小的趋势,而Re,W,Ru,Co元素则呈现与之相反的规律,Mo,Cr元素无明显变化;而熔体超温处理温度对Ru,Co,Mo,Cr元素的溶质分配系数影响较小.熔体超温处理使合金熔体结构发生变化,进而影响元素分布,是导致溶质分配系数发生变化的主要原因.
[Abstract]:The melt overtemperature treatment technology was used to treat the new Ni-base single crystal superalloy melt containing Re and Ru at different temperatures. The solute distribution of alloy elements and the evolution of solute partition coefficient with melt overtemperature treatment temperature during directional solidification were studied by EPMA. The results show that with the increase of melt temperature, the distribution of Al,Ta elements in the liquid phase at the front of the solid-liquid interface increases first and then decreases under the condition of directional solidification at the flat interface. However, the Re,W,Ru,Co element showed the opposite rule, the Mo,Cr element had no obvious change, while the melt overtemperature treatment temperature had little effect on the solute partition coefficient of Ru,Co,Mo,Cr element. The structure of alloy melt was changed by melt overtemperature treatment, which affected the distribution of elements, which was the main reason for the change of solute partition coefficient.
【作者单位】： 西北工业大学凝固技术国家重点实验室;
【基金】：国家自然科学基金项目51331005;51472200和51272211 航空科学基金项目2015ZF53067 国家高技术研究发展计划项目2012AA03A511资助~~
【分类号】：TG132.3
[Abstract]:The melt overtemperature treatment technology was used to treat the new Ni-base single crystal superalloy melt containing Re and Ru at different temperatures. The solute distribution of alloy elements and the evolution of solute partition coefficient with melt overtemperature treatment temperature during directional solidification were studied by EPMA. The results show that with the increase of melt temperature, the distribution of Al,Ta elements in the liquid phase at the front of the solid-liquid interface increases first and then decreases under the condition of directional solidification at the flat interface. However, the Re,W,Ru,Co element showed the opposite rule, the Mo,Cr element had no obvious change, while the melt overtemperature treatment temperature had little effect on the solute partition coefficient of Ru,Co,Mo,Cr element. The structure of alloy melt was changed by melt overtemperature treatment, which affected the distribution of elements, which was the main reason for the change of solute partition coefficient.
【作者单位】： 西北工业大学凝固技术国家重点实验室;
【基金】：国家自然科学基金项目51331005;51472200和51272211 航空科学基金项目2015ZF53067 国家高技术研究发展计划项目2012AA03A511资助~~
【分类号】：TG132.3
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