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热量输入对接微观结构的影响以及Invar 36合金在钥匙孔TIG接中的性能
Hongbing Liu1,2, Shanhui Lv1, Yang Xuan3
1School of Materials Engineering, Shanghai University of Engineering Science, Shanghai 201620, China.
Materials (Basel, Switzerland)
|May 27, 2023
概括
用于飞机机翼模具的Invar 36合金 Keyhole-tungsten惰性气 (K-TIG) 接显示了奥氏体微观结构. 增加的热量输入减少了冲击性能,但仍然适合用于航空航天应用.
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.
- 航空航天工程 航空航天工程
背景情况:
- 由于其低热膨胀,因瓦尔合金对于飞机机翼模具制造至关重要.
- 连接厚厚的Invar板块需要强大的接技术来保持材料的完整性和性能.
研究的目的:
- 研究热量输入对K-TIG接Invar 36合金的微观结构,形态和机械性能的影响.
- 通过评估关节特性,评估K-TIG接工艺适用于航空航天应用的适用性.
主要方法:
- 钥匙孔黄惰气 (K-TIG) 接10毫米厚的Invar 36合金板.
- 使用扫描电子显微镜 (SEM) 和高能同步子X射线衍射进行微结构分析.
- 机械性能评估,包括微硬度测绘,拉力测试和冲击测试.
- 测量热膨胀系数的方法.
主要成果:
- 接的Invar 36合金仅由奥氏体组成,颗粒大小因热量输入而有很大变化.
- 热量输入影响了融合区的纹理,正如通过同步辐射观察到的.
- 接接头的冲击性能随着输入热量的增加而下降.
- 测量了接接头的热膨胀系数.
结论:
- K-TIG接是连接用于航空航天应用的Invar 36合金板的可行方法.
- 优化热量输入对于平衡微观结构和机械性能,特别是冲击强度至关重要.
- 接接头具有适合飞机机翼模具制造的苛刻要求的性能.
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