Purpose

This paper aims to investigate the influence of scan speed on the corrosion and tribocorrosion features of the CoCrMoW samples fabricated via the selective laser melting (SLM) process.

Design/methodology/approach

CoCrMoW samples were produced by SLM at different scan speeds. Produced samples were made via structural surveys (X-ray diffraction examinations and scanning electron microscopic analyses), hardness measurements and electrochemical and tribocorrosion experiments.

Findings

Outcomes displayed that the corrosion and tribocorrosion properties of CoCrMoW alloy were significantly influenced by scanning speeds. Also, these properties of the alloy increased with increasing scanning speeds. CoCrMoW samples produced at a laser scan speed of 1,000 mm/s showed the best resistance to corrosion and tribocorrosion. This could be related to the high hardness and low grain structure of the fabricated samples.

Originality/value

This paper may be a practical reference and offers insight into the effect of scanning speeds on the increase of hardness, tribological and corrosion performance of CoCrMoW alloys. This study can help in the further advancement of cobalt-chromium alloy in situ produced by SLM for both electrochemical and tribocorrosion behavior for biomedical applications.

中文翻译：

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扫描速度对激光选区熔化原位钴铬合金腐蚀及摩擦腐蚀性能的影响

目的

本文旨在研究扫描速度对通过选择性激光熔化 (SLM) 工艺制造的 CoCrMoW 样品的腐蚀和摩擦腐蚀特征的影响。

设计/方法论/途径

CoCrMoW 样品是通过 SLM 以不同的扫描速度生产的。生产的样品是通过结构测量（X 射线衍射检查和扫描电子显微镜分析）、硬度测量以及电化学和摩擦腐蚀实验制成的。

发现

结果表明，CoCrMoW 合金的腐蚀和摩擦腐蚀性能受扫描速度的显着影响。此外，合金的这些性能随着扫描速度的增加而增强。以 1,000 毫米/秒的激光扫描速度生产的 CoCrMoW 样品显示出最佳的耐腐蚀和摩擦腐蚀能力。这可能与制造的样品的高硬度和低晶粒结构有关。

原创性/价值

本文可作为实用参考，深入了解扫描速度对 CoCrMoW 合金硬度、摩擦学和腐蚀性能增加的影响。这项研究有助于进一步发展SLM原位生产的钴铬合金，以实现生物医学应用的电化学和摩擦腐蚀行为。