铸造2025，Vol.74Issue(6)：738-744,7.
固溶温度对轻质DZ417G合金蠕变性能的影响研究
Effect of Solution Temperature on Creep Properties of Lightweight DZ417G Alloy
韩奇 1肖旋 2管现军 3蔡航 3曲天壬2
作者信息
- 1. 沈阳理工大学材料科学与工程学院,辽宁沈阳 110000||中国科学院金属研究所,辽宁沈阳 110000
- 2. 沈阳理工大学材料科学与工程学院,辽宁沈阳 110000
- 3. 中国科学院金属研究所,辽宁沈阳 110000
- 折叠
摘要
Abstract
To investigate the influence of solid solution treatment temperature on the microstructure and mechanical properties of DZ417G alloy,this study conducted high-temperature tensile testing at 900 ℃ and high-temperature creep testing at 980 ℃/165 MPa on DZ417G alloys subjected to different solid solution treatments((1 230-1 250)℃ ×4 h+air cooling).Furthermore,to understand the micro-mechanisms behind the effects of solid solution treatment temperature on the mechanical properties,the microstructures of the DZ417G alloys before and after mechanical property testing were systematically characterized using scanning electron microscopy(SEM)and transmission electron microscopy(TEM).The results indicated that at 1 250 ℃,the DZ417G alloy exhibited uniform,fine,and highly cubic γ'precipitates.Compared to the creep lives of alloys treated at 1 230 ℃ and 1240 ℃,the alloy treated at 1 250℃ exhibited the highest creep life,reaching 204.9 h,indicating that 1 250 ℃ was the optimal solid solution treatment temperature for DZ417G alloy.SEM and TEM analyses suggested that smaller misfits and higher cubicity,along with a higher volume fraction of γ'precipitates,were the primary reasons for the superior creep life of DZ417G alloy after treatment at 1 250℃ for 4 h.关键词
DZ417G合金/γ'相/固溶温度/蠕变寿命/显微组织/力学性能Key words
DZ417G alloy/γ'phase/solution temperature/creep life/microstructure/mechanical property分类
矿业与冶金引用本文复制引用
韩奇,肖旋,管现军,蔡航,曲天壬..固溶温度对轻质DZ417G合金蠕变性能的影响研究[J].铸造,2025,74(6):738-744,7.
