Evaluación de las propiedades tribológicas de materiales compuestos de matriz metálica (MMCs) procesados por técnicas de fabricación aditiva con haz láser (SLM)
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Universidad Industrial de Santander
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En este artículo se investigaron las propiedades mecánicas y tribológicas de materiales compuestos de matriz de acero (acero inoxidable 316L reforzado con partículas cerámicas Cr3C2) procesados por tecnologías de fabricación aditiva de fusión selectiva con láser (SLM). Se estudió el comportamiento a desgaste con el ensayo “pin-on-disk” a temperatura ambiente y se observó la superficie desgastada mediante microscopía electrónica de barrido (SEM). Los resultados indicaron que el coeficiente de fricción no tiene una tendencia clara o relación directa cuando se varía el porcentaje de refuerzo mientras que la tasa de desgaste disminuye con el aumento del contenido de refuerzo. Las mejores propiedades se obtuvieron con un 6% en peso de refuerzo.
The mechanical and tribological properties of steel matrix composites (316L stainless steel reinforced with Cr3C2 ceramic particles) were investigated. The steel matrix composites (SMC) with three reinforcing percentages (3, 6, and 9 wt.%) were manufactured by Additive Manufacturing technologies (SLM: Selective Laser Melting). The wear behaviour was studied by using a pin-on-disk wear test at room temperature. The worn surface was analysed using Scanning Electron Microscopy (SEM). The results indicated that the friction coefficient does not have a clear tendency or direct correlation with the reinforcement variation while the wear rate decreases with increasing content of reinforcement. The better properties combination were achieved with 6 wt.% of reinforcement.
The mechanical and tribological properties of steel matrix composites (316L stainless steel reinforced with Cr3C2 ceramic particles) were investigated. The steel matrix composites (SMC) with three reinforcing percentages (3, 6, and 9 wt.%) were manufactured by Additive Manufacturing technologies (SLM: Selective Laser Melting). The wear behaviour was studied by using a pin-on-disk wear test at room temperature. The worn surface was analysed using Scanning Electron Microscopy (SEM). The results indicated that the friction coefficient does not have a clear tendency or direct correlation with the reinforcement variation while the wear rate decreases with increasing content of reinforcement. The better properties combination were achieved with 6 wt.% of reinforcement.
Keywords
Pin-on-disk test, friction coefficient, wear rate, metal matrix composites (MMCs), additive manufacturing (AM), selective laser melting (SLM), worn surface, Ensayo “pin-on-disk”, coeficiente de fricción, tasa de desgaste, materiales compuestos de matriz metálica (MMCs), fabricación aditiva (AM), fusión selectiva con láser (SLM), superficie de desgaste modelo