THERMOCHEMICAL SOLID CEMENTATION TREATMENT USING RICE HUSK ASH AND CHARCOAL ON SAE 1020 STEEL. - de Oliveira, Ana Cláudia Costa; Leite Dyer, Paulo Paiva Oliveira; da Silva, Maria Margareth; da Silva Dyer, Silvelene Alessandra; de Vasconcelos, Getulio (Revista UniVap, 2026)