扩散结合321级不钢:故障和多式联接特性
Isac Lazar1, Axel Knutsson2, Hector Pous Romero2
1Department of Physics, Division of Synchrotron Radiation Research, Lund University, 221 00 Lund, Sweden.
概括
不钢321H的真空扩散粘合在高温应用中受到Ti (C,N) 沉的阻碍. 这项研究揭示了Ti在氧化物上的扩散和核化,影响了键的强度.
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.
- 化学工程是化学工程的重要组成部分.
背景情况:
- 印刷电路换热器对于下一代能源系统至关重要,这些系统需要高温和高压能力.
- 真空扩散粘合是这些应用的关键连接技术.
- 高温材料通常由于结合线上的沉而表现出较差的结合强度,阻碍了谷物边界迁移.
研究的目的:
- 调查真空扩散结合321H等级不钢机械性能差的原因.
- 阐明在高温扩散结合过程中结合线上的微观结构演变和沉机制.
主要方法:
- 在现场研究321H等级不钢的扩散粘合.
- 对结合线上的沉量进行分析.
- 研究扩散及其与其他沉物的相互作用.
主要成果:
- 在等级321H中,机械性能差的原因是结合线上的Ti (C,N) 沉.
- 观察到在高温下从体积扩散到交配表面.
- 观察到一种新的核心外结构,其中Ti (C,N) 在Al/Mg氧化物沉物上核化.
结论:
- 合金元素,即使是少量,也会显著影响扩散键质量.
- 了解粘合过程中的微结构演变对于优化高温材料应用至关重要.
- 对结合条件和合金效应的进一步研究是有必要的.
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