冷卻速度對Waspaloy合金凝固過程中偏析和液體密度的影響

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基金項目:

國家自然科學基金資助項目(No.50371006)

Effect of cooling rate on the segregation and liquid density of Waspaloy alloy during solidification process

1. School of Materials Science and Engineering, University of Science and Technology Beijing, Beijing 100083, China;
2. College of Math and Physics, Nanjing University of Information Science and Technology, Nanjing 210044, China

摘要: 通過不同冷速下的重熔凝固實驗,利用掃描電鏡和能譜儀系統研究了冷速變化對Waspaloy合金凝固過程偏析行為和液體密度的影響.結果表明:隨著冷速的增大,Waspaloy合金中元素的偏析會減小,凝固過程中偏析最嚴重的是富集于枝晶間的正偏析元素Ti;元素偏析導致剩余液體的密度發生變化,而且液體密度基本上呈現反轉趨勢,當凝固溫度到1300℃時,出現最大的密度反轉.
- Waspaloy合金 /
- 凝固組織 /
- 冷速 /
- 凝固偏析 /
- 液體密度
Abstract: Remelting tests at different cooling rates for Waspaloy alloy were performed and the effect of cooling rate on the segregation behavior and the liquid density of Waspaloy alloy during solidification process was systematically investigated by SEM and EDAX. The results show that the element segregation decreases with increasing cooling rate and Ti segregation is the most serious during solidification which is a positive segregation element and congregates in interdendritic area. The liquid density exhibits an in-version trend due to the element segregation. The maximum liquid density inversion occurs near the solidification temperature of 1 300℃.
- Waspaloy alloy /
- solidification structure /
- cooling rate /
- solidification segregation /
- liquid density