固溶后冷却方式对Inconel X-750合金组织和性能的影响

采用SEM、TEM、EDAX和相分析等分析手段,研究Inconel X-750合金固溶后不同冷却方式下组织和性能的变化。结果显示:水冷和油冷抑制合金中γ′相的析出,时效后均析出球形的γ′相。炉冷后合金中析出一次立方体形γ′相和二次球形γ′相,时效后再次析出球形γ′相;水冷和油冷后晶界上无碳化物析出,时效后晶界上均析出细小针状M₂₃C₆。炉冷后合金晶界上析出块状M₂₃C₆,时效后碳化物尺寸略微长大,形状基本不变;炉冷+时效后合金的强度最高,水冷+时效后合金的冲击性能最好。

Effect of cooling mode on microstructure and properties of solution treated Inconel X-750 alloy

SEM,TEM,EDAX and phase analysis were used to study the changes of microstructure and properties of Inconel X-750 alloy after solid solution with different cooling mode. The results show that the water cooling and oil cooling inhibit γ’ precipitation,however spherical γ’ is precipitated after aging. After the furnace cooling,a cubic γ’ and a secondary spherical γ’ are precipitated in the alloy,and the spherical γ’ is precipitated again after aging. There is no carbide precipitation on the grain boundary after water cooling and oil cooling,fine needle-like M23C6 precipitates on the grain boundary after aging. The block M23C6 precipitates on the grain boundary of the alloy after furnace cooling. The carbide size grows slightly and the shape is basically unchanged after aging;the strength of the alloy is the highest after furnace cooling + aging,and the impact property of the alloy is the best after water cooling + aging.