对L-PBF 316L不钢的疲劳和腐蚀评价,该不钢经过了自终止蚀刻工艺,用于改善表面表面
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Updated: May 12, 2026

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Potentiodynamic Corrosion Testing
Published on: September 4, 2016
Stephanie Prochaska1, Subbarao Raikar2, Owen Hildreth2
1Department of Mechanical Engineering, Materials Science Program, Colorado School of Mines, Golden, Colorado, USA.
3D printing and additive manufacturing
|October 3, 2024
概括
自动终止蚀刻工艺 (STEP) 显著提高了激光粉床融合316L不钢的性能.
科学领域:
- 材料科学 材料科学 材料科学
- 增材制造 增材制造 增材制造
- 表面工程是什么?表面工程是什么?
背景情况:
- 正如打印 (AP) 激光粉末床融合 (L-PBF) 316L不钢表现出不良的表面表面,对疲劳和耐腐蚀性产生负面影响.
- 自动终止蚀刻工艺 (STEP) 是一种后加工技术,可以提高表面粗度高达76%.
研究的目的:
- 评估STEP对L-PBF 316L不钢的疲劳寿命和腐蚀性能的影响.
- 研究STEP前热处理 (减压和溶液回火) 对表面表面,微观结构,疲劳和腐蚀性能的影响.
主要方法:
- 使用L-PBF 316L不钢的样品经过了STEP后处理.
- 进行的比较分析包括按印刷 (AP),减压+STEP (SR+STEP) 和溶液化+STEP (SA+STEP) 条件.
- 在化电解质中评估了表面粗度 (Sa和Sv),微观结构,疲劳性能和耐腐蚀性.
主要成果:
- 在SR+STEP处理过程中,最好的SA粗度得到了改善,而SA+STEP在Sv粗度方面得到了最大的改善.
- 尽管Sv粗度有所改善,但SA + STEP标本由于粗粒和内部多孔性而表现最差的疲劳性能.
- 与AP样本相比,SR + STEP样本显示出显著增强的疲劳寿命 (10x在275 MPa,2-3x在350 MPa) 和优越的耐腐蚀性.
结论:
- 前STEP压力减轻,其次是STEP是一个有效的后加工策略,用于提高L-PBF 316L不钢的疲劳寿命和耐腐蚀性.
- 微观结构,特别是颗粒大小和多孔性,在加工后的L-PBF零件的疲劳性能中起着至关重要的作用.
- 步骤处理,特别是当与适当的热处理相结合时,可以克服L-PBF组件中印刷表面的局限性.
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