优化Ti-45Nb合金的弹性模块温度系数通过老化诱导的纳米沉α相
Fujian Guo1,2, Guangyi Lu2, Wenle Liu2,3
1School of Materials Science and Engineering, Guangdong Ocean University, Yangjiang 529500, China.
Materials (Basel, Switzerland)
|December 17, 2024
概括
热处理显著提高了 - (TiNb) 合金中的弹性模块的温度系数. 优化的老化降低了这个系数,使得TiNb合金适用于精密制表应用.
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.
- 物理化学 物理化学
背景情况:
- - (TiNb) 合金以其优越的性能而闻名,包括抗磁特性,使其在航空航天,医疗和制表行业具有价值.
- 弹性模块的温度系数对于评估材料在温度变化中的稳定性至关重要,特别是在计时器中的平衡弹.
研究的目的:
- 研究热处理对Ti-45Nb合金微结构和弹性模量温度系数的影响.
- 确定最佳的热处理条件,以提高TiNb合金在制表行业的适用性.
主要方法:
- 对Ti-45Nb合金进行微结构分析,该合金经过不同时间的老化.
- 在低温老化过程中追踪相变 (β → β + β' → β + ω → β + ω + α).
- 使用低温动态弹性模块测试仪测量弹性模块温度系数.
主要成果:
- 短期老化导致在谷物边界的 ω 颗粒丰富;长期老化引入了 α 阶段.
- 该材料的弹性模量原始温度系数很高 (50220 × 10−6·°C−1).
- 长期老化,特别是经过48小时的热保存后,使系数显著降低到0±30 × 10−6°C−1,符合行业标准 (-11~35 × 10−6°C/°C).
结论:
- 热处理,特别是长期老化,通过引入α相,有效地改变了Ti-45Nb合金的微观结构.
- 这种微观结构的进化显著降低了弹性模块的温度系数,提高了材料的稳定性.
- 优化Ti-45Nb合金的热处理为需要热稳定的高性能腕表组件提供了可行的解决方案.
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