在JG4246A合金中不同模块截面的微观结构和属性特征模拟件
Hai-Tao Jiang1,2, Lei Jin1,2, Gao-Yang Jing1,2
1China Academy of Machinery Shenyang Research Institute of Foundry Co., Ltd., Shenyang 110022, China.
Materials (Basel, Switzerland)
|March 14, 2026
概括
这项关于-超级合金的研究表明,更快的冷却速度会产生更细的粒度和更高的件强度. 冷却速度较慢会导致粒度较大,机械性能降低.
科学领域:
- 材料科学 材料科学 材料科学
- 金工业是金工业的一个方面.
- 造技术 造技术 造技术
背景情况:
- 基于 (Ni3Al) 的超级合金对于高温应用至关重要.
- 了解造超级合金中的微观结构-属性关系对于性能优化至关重要.
- 造过程参数显著影响最终的微观结构和机械性能.
研究的目的:
- 为了研究冷却速度对造JG4246A Ni3Al基超合金的微观结构和室温机械性能的影响.
- 建立冷却速率,粒度大小,碳化物形态和机械性能之间的定量相关性.
- 为优化高温合金的造过程提供指导方针.
主要方法:
- 在受控的预热和倒温度下生产了JG4246A超合金的特征模拟造.
- 在件的不同部分对微观结构特征 (颗粒大小,碳化物大小) 的系统研究.
- 在不同位置测量室温机械性能,包括拉伸强度和度强度.
主要成果:
- 造部分的冷却速度各不相同,右上角的冷却速度最快,中下段的冷却速度最慢.
- 在更快的冷却速度下观察到更细粒度 (0.46毫米) 和更高的强度 (拉力 ~ 698 MPa,产量 ~ 581 MPa).
- 较大的颗粒大小 (1.55毫米) 和较低的强度 (拉力约612.5MPa,产量约524.5MPa) 与较慢的冷却速度有关.
- MC碳化物的大小和分布也各不相同,与延长等机械性质相关.
结论:
- 在造Ni3Al超合金中的冷却速率,微观结构和机械性能之间存在明确的定量关系.
- 优化造参数,特别是冷却速度,对于实现所需的微观结构统一性和机械性能至关重要.
- 这些发现为提高造过程和确保高温合金组件的微观结构一致性提供了宝贵的见解.
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