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Influence of Laser Hardening Substrate on Microstructure and Bonding of Electroplating Chromium Coating
Authors
张坤
徐向阳
罗耕星
陈光南
Publication date
1 January 2006
Publisher
Abstract
采用激光相变硬化的方法在电镀前对基体表层预先进行处理,以改善镀层与基体的结合强度,提高其承载能力。借助扫描电镜(SEM)分析镀铬层的组织和界面,对镀层、相变硬化区和基体的硬度变化进行分析,对镀层抗高温烧蚀能力进行测试。结果表明,基体经激光相变硬化处理后,既可以促进镀层外延生长,又可以在镀层和基体之间实现硬度的梯度过渡,从而可以改善结合,缓解应力,提高承载能力,镀层的抗剥落能力和使用寿命得到显著提高。激光相变硬化得到细小的淬火马氏体,位错密度显著增加,表面活性增强,是促进镀层外延生长的主要原因
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Institute Of Mechanics,Chinese Academy of Sciences
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Last time updated on 12/02/2018