Influence of Hot Compression on the Microstructure of GH4169 Alloy
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摘要: 系统研究了GH4169合金在900~1 150℃、变形量为50%、变形速率为10 s-1的压缩条件下的微观组织演变。结果表明,在设定的温度范围内,GH4169合金的微观组织逐渐由变形态向不完全再结晶态以及完全再结晶态发生转变。合金中的析出相主要有微米级别的块状碳化物和亚微米级别的颗粒状δ相。少量细小析出相的存在对合金的组织细化有着很好的促进作用,在相对较小的变形量下,合金的晶粒尺度同变形前相比显著减小。Abstract: A systematic study has been made to investigate the microstructural evolution of GH4169 alloy under hot compression at temperatures from 900 to 1 150 ℃ with a reduction in thickness of 50%.It is shown that with increasing temperature,the microstructure of the compressed alloy evolves from a deformed structure to a partially recrystallized structure and finally to a fully recrystallized structure.Block carbides with sizes in micron scale and granular δ-phase with sizes in submicron scale are the main precipitates of the compressed alloy,which shows a significant contribution to the structural refinement.The grain size of deformed steel had been significantly reduced even at only 50% reduction.
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Key words:
- superalloy /
- GH4169 /
- hot compression /
- microstructure
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