微结构进化和加强V-N微合金因瓦合金的机制,通过机械热处理加工
Shuo Zhang1, Xueting Liu1, Hui Liu1
1College of Materials Science and Engineering, Taiyuan University of Technology, Taiyuan 030024, China.
Materials (Basel, Switzerland)
|September 13, 2025
概括
这项研究通过结合冷变形和V(C,N) 沉强化来提高Invar合金的强度. 由此产生的高强度,低热膨胀合金是精密仪器的理想选择.
科学领域:
- 材料科学 材料科学 材料科学
- 金工业是一种金工业.
- 机械工程 机械工程
背景情况:
- 由于其低热膨胀,因华合金对于精密仪器至关重要.
- 传统的英华合金往往缺乏足够的机械强度,无法满足工程应用的要求.
- 对于提高Invar合金强度的方法,在不影响其低热膨胀系数 (CTE) 的前提下,有着至关重要的需求.
研究的目的:
- 研究提高Invar合金的强度,同时保持其低CTE.
- 探索变形强化和V (C,N) 降水强化的联合效应.
- 开发用于先进工程用途的高性能Invar合金.
主要方法:
- 结合冷变形与V(C,N) 沉强化.
- 调查突移密度增加对V (C,N) 降水的影响.
- 将冷和老化的合金与直接老化的合金的机械性能和CTE进行比较.
主要成果:
- 冷变形显著增加了V (C,N) 沉,增加了位移密度.
- 冷和老化的Invar合金与直接老化的对应物相比,具有更高的强度.
- 通过减少40%的冷和在650°C老化3小时达到最佳性能:907MPa的抗拉强度,6.9%的延长.
- 低CTE为1.31 × 10-6/°C,保持在20至100°C之间.
结论:
- 综合方法有效地提高了Invar合金的强度,同时保持了较低的CTE.
- 变形处理促进了沉增强,从而改善了机械性能.
- 这项研究为开发用于高强度,低膨胀应用的先进Invar合金提供了途径.
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