Fabricación y caracterización de carburos de wolframio WC-X (X = Co, Ni) obtenidos por vía pulvimetalúrgica//Fabrication and characterisation of tungsten carbide WC-X(X=Co, Ni) obtained by powder metallurgy

Authors

  • Luis Carlos Ardila-Téllez Universidad Nacional de Colombia. Facultad de Ingeniería. Bogotá

Abstract

La industria pulvimetalúrgica es una tecnología que en Colombia es poco investigada a pesar de su éxito a nivel mundial. A nivel nacional, el sector de máquina-herramienta, automotriz y oil & gas son los mayores consumidores de este tipo de aleaciones. En este artículo se incursionó en la pulvimetalúrgica de materiales
cerámico-metálico. Se sinterizaron y caracterizaron exitosamente las aleaciones 90WC8Co2Ni y 94WC6Ni usadas en boquillas y asientos de válvula de la industria petrolera y se compararon con calidades comerciales. Los análisis EDS y de DRX de las 2 aleaciones, laboratorio y comerciales, son similares; no obstante su
microestructura y dureza difieren debido al proceso de fabricación y tamaño de grano de WC. Las aleaciones comerciales tienen dureza 15-19 % superior a las de laboratorio. En la composición comercial con sólo níquel se observan defectos asociados al proceso mientras que en las muestras de laboratorio no se observan dichas anomalías.

Palabras claves: pulvimetalurgia, metal duro, microestructura, caracterización, tamaño de grano.
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Abstract

Powder metallurgy is a technology poorly developed in Colombia despite of worldwide success. At local level, machine tool, automotive and oil & gas sectors are the largest consumers of this kind of alloys. This article address in the PM process of ceramicmetallic materials known as CERMETS. Were successfully sinteredand characterised the alloys 90WC8Co2Ni and 94WC6Ni used in oil & gas nozzle and valve seats and they were compared with commercial ones. EDS and XRD of the two alloys, laboratory and commercial, are similar; however, its microstructure and hardness differ due to manufacturing process and WC grain size. Commercial alloys have hardness 15-19% higher than laboratory. In the commercial composition, with only nickel, defects associated to the manufacturing process were detected. Meanwhile laboratory samples not show those anomalies.

Key words: powder metallurgy, hardmetal, microstructure, characterisation, grain size.

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How to Cite

1.
Ardila-Téllez LC. Fabricación y caracterización de carburos de wolframio WC-X (X = Co, Ni) obtenidos por vía pulvimetalúrgica//Fabrication and characterisation of tungsten carbide WC-X(X=Co, Ni) obtained by powder metallurgy. Ing. Mec. [Internet]. 2017 Jan. 4 [cited 2025 Sep. 13];20(1):6-13. Available from: https://ingenieriamecanica.cujae.edu.cu/index.php/revistaim/article/view/551

Issue

Vol. 20 No. 1 (2017): enero-abril

Section

Original article

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