THE EFFECT OF FINE COAL IN TUBE MOLDS WHEN POURING ALUMINUM ALLOY 6061 ON WEAR RATE AND HARDNESS VALUE. International Journal of Geomate, [S. l.], v. 19, n. 76, p. 48–53, 2020. Disponível em: https://geomatejournal.com/geomate/article/view/872. Acesso em: 9 oct. 2026.