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Updated: May 23, 2025

Negative Additive Manufacturing of Complex Shaped Boron Carbides
Published on: September 18, 2018
B含量对CrFeNiAlSi高合金微观结构和性能的影响
Ying Wen1, Jian Chen1, Gang Li2
1School of Mining, Liaoning Technical University, Fuxin 123000, China.
将 (B) 添加到-铁---高合金 (HEAs) 中,可以提高硬度和耐磨性. 然而,较高的含量增加了颗粒间腐蚀,同时提高了高温氧化阻力.
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.
- 腐蚀科学 腐蚀科学
背景情况:
- 高合金 (HEAs) 由于其多元素组成,具有独特的特性.
- 调查 (B) 等间歇性元素的作用对于定制HEA性能至关重要.
- 了解微观结构与属性关系是开发先进材料的关键.
研究的目的:
- 为了合成和描述一系列具有不同含量的CrFeNiAlSiB HEAs.
- 系统地评估对微观结构,相位形成,硬度,磨损,腐蚀和氧化抵抗的影响.
- 为特定的性能增强确定最佳度.
主要方法:
- 用于合金合成的真空弧化.
- 微结构分析 (树突形态,阶段识别).
- 机械测试 (硬度,耐磨性).
- 电化学测试 (NaCl溶液中的耐腐蚀性).
- 高温氧化试验. 高温氧化试验.
主要成果:
- CrFeNiAlSiB HEAs包括BCC, (Cr,Fe) 3Si,和 (Cr,Fe) B阶段.这些阶段包括:
- 添加形成了针状的第二阶段,增强了硬度,B0.3 HEA显示了峰值硬度 (1121 HV) 和最低磨损.
- B0.3 HEA 在3.5%重量NaCl中表现出优越的耐腐蚀性 (0.043 mm/a).
- 增加的含量导致了更粗的第二阶段,促进了颗粒间腐蚀.
- 通过加速保护膜的形成,提高了高温氧化阻力.
结论:
- 极大地影响了CrFeNiAlSiB HEAs的微观结构和特性.
- 适度的含量 (B0.3) 优化了硬度,耐磨性和耐腐蚀性.
- 较高度的可以对由于微观结构变化的耐腐蚀性产生负面影响.
- 添加有利于增强高温氧化阻力.
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