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| 热轧和退火对Au-20Sn合金箔材组织和性能的影响 |
| Effect of hot rolling and annealing treatment on microstructure and properties of Au-20Sn alloy foil |
| Received:January 14, 2021 |
| DOI： |
| 中文关键词: 金属材料 Au-Sn合金 热轧 退火 |
| 英文关键词: metal materials Au-Sn alloy hot rolling annealing |
| 基金项目: |
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| 中文摘要: |
| 采用热轧方法制备了Au-20Sn合金箔材，研究轧制和退火处理对合金箔材微观组织和硬度的影响。结果表明，铸态Au-20Sn合金组织由枝晶状Au5Sn初生相及交替生长形成的片层状共晶组织组成。铸态合金经热轧后发生了动态再结晶，粗大的片层状共晶组织转变为沿轧制方向拉长的两相组织。经退火处理，合金热轧组织逐渐转变为均匀的等轴状。随退火时间和退火温度的增加，合金硬度逐渐降低。经合适条件退火，能够提高箔材变形性能，避免冲压焊片过程中产生边部的裂纹缺陷。 |
| 英文摘要: |
| Au-20Sn alloy foil is prepared by hot rolling in the present work. The effects of hot rolling and annealing treatment on microstructure and hardness of the foil are investigated. The results show that the microstructure of as-cast Au-20Sn alloy is composed of dendritic Au5Sn primary phases and lamellar eutectic structure. It is clear that a fully recrystallization takes place during hot rolling process. And the coarse lamellar eutectic structure transforms to elongated two-phase structure along the rolling direction. After annealing heat treatment, the initial elongated structure gradually develops into the uniform equiaxed grain microstructure. The hardness decreases with the increase of annealing time and temperature. Reasonable annealing treatment can remarkably improve the forming performance of Au-20Sn alloy foil, thus the edge cracks can be avoided during stamping manufacturing. |
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