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超高强度汽车钢的微观结构演变和内部含量在两个典型的工业生产流程中
Zhiyuan Chang1, Jingjing Yin1, Long Li1
1State Key Laboratory of Vanadium and Titanium Resources Comprehensive Utilization, Pangang Group Research Institute Co., Ltd., Panzhihua 617000, China.
Materials (Basel, Switzerland)
|May 14, 2025
概括
汽车钢的热冲压涉及微观结构变化,不受Al-Si涂层的影响. 在制造过程中,Al-Si涂层形成脆薄的层,并增加含量.
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.
- 表面工程是什么?表面工程是什么?
背景情况:
- 热冲压对于生产具有精确尺寸的高强度汽车钢件至关重要.
- 了解Al-Si涂料热冲压过程中的微结构演变和的行为,对于材料性能至关重要.
研究的目的:
- 在工业热冲压过程中调查汽车钢的微观结构演变和含量.
- 分析Al-Si涂层的组成和相位结构及其对基板的影响.
- 为了比较使用和不使用Al-Si热浸的生产流程.
主要方法:
- 在不同生产阶段对微观结构变化的描述.
- 使用能量分散光谱法 (EDS) 和电子反射散射衍射法 (EBSD) 分析Al-Si涂层组成和相位结构.
- 在涂层和未涂层钢样品中量化含量.
主要成果:
- 钢基板微观结构经过几个阶段的演变,包括珍珠岩,铁岩,马氏体和炼马氏体,独立于Al-Si热浸.
- Si涂层呈现出多个子层结构,FeAl和Fe2Al5相交替,Fe2Al5相中出现微裂.
- 与赤裸钢相比,Al-Si涂层的样本始终显示出较高的含量,这是由于加工过程中的生成和吸收.
结论:
- 在热印过程中,Al-Si热并不会改变钢基板的基本微结构演变.
- Si涂层的多层结构,包括易碎的Fe2Al5,提出了潜在的挑战.
- 制造过程,特别是热化,显著增加了钢中的吸收.
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