电极感应化气体原子化和真空感应化原子化产生的粉末及其作为HIPed空白的属性
Xiaona Ren1, Yao Wang1, Zhenfan Wang1,2
1School of Materials Science and Engineering, University of Science and Technology Beijing, Beijing 100083, China.
Materials (Basel, Switzerland)
|February 13, 2025
概括
电极诱导的气体原子化 (EIGA) 产生比真空诱导的气体原子化 (VIGA) 更细的基于Ni的超合金粉末. 虽然EIGA粉末具有更好的表面质量,但由于微观结构的变化,VIGA衍生空白显示出略高的机械性能.
科学领域:
- 材料科学 材料科学 材料科学
- 粉末金工艺 在粉末金工艺
- 超级合金是一种超级合金.
背景情况:
- 惰性气体原子化,特别是真空诱导气体原子化 (VIGA),是大型超级合金粉末生产的标准.
- 一种新的无体电极诱导气体原子化 (EIGA) 技术为制备非包含超级合金粉末提供了潜力.
研究的目的:
- 为了比较基于Ni的超合金FGH4096粉末及其通过EIGA和VIGA制备的热同静压 (HIPed) 空白的性能.
- 评估不同原子化方法对粉末特性和随后材料性能的影响.
主要方法:
- 使用VIGA和EIGA方法制备FGH4096超合金粉末.
- 粉末空白通过直接热静态压力 (如HIPed) 形成近网形.
- 使用激光颗粒大小分析,SEM和TEM进行粉末颗粒大小,形态,微观结构和机械性能 (室温和650°C的拉力测试) 的比较分析.
主要成果:
- 与VIGA粉末相比,EIGA粉末的颗粒尺寸更细,表面质量更好,卫星颗粒更少.
- 来自EIGA粉末的As-HIPed空白显示了较低的二次γ'比率和略有降低的强度与VIGA空白相比.
- 两个样本之间的整体性能差异并不显著,尽管颗粒大小的变化影响了HIP的传热和空白特性.
结论:
- EIGA是一种有前途的方法,用于生产具有改进特性的高质量超级合金粉末.
- 虽然EIGA在粉末质量方面具有优势,但由于微观结构的差异,VIGA可能会在HIPed空白中产生略有更好的机械性能.
- 建议进一步优化HIP过程,以减轻因粉末特性差异而产生的性能变化.
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