The effect of cold forming on structure and properties of 32 CDV 13 steel by radial forging process

• Published in: Materials research (São Carlos, São Paulo, Brazil) Vol. 17; no. 2; pp. 445 - 450
• Main Authors: Arreola-Herrera, Rodolfo, Cruz-Ramírez, Alejandro, Suárez-Rosales, Miguel Ángel, Sánchez-Álvarado, Ricardo Gerardo
• Format: Journal Article
• Language: English
• Published: ABM, ABC, ABPol 01.04.2014; Associação Brasileira de Metalurgia e Materiais (ABM); Associação Brasileira de Cerâmica (ABC); Associação Brasileira de Polímeros (ABPol)
• Subjects: 32 CDV 13 steel; Cold forging; Deformation; ENGINEERING, CHEMICAL; fractography; Fracture mechanics; Fracture toughness; MATERIALS SCIENCE, MULTIDISCIPLINARY; METALLURGY & METALLURGICAL ENGINEERING; Plastic deformation; Radial forging; Reduction; Structural steels; fractography; 32 CDV 13 steel; radial forging; cold forging
• ISSN: 1980-5373; 1516-1439; 1980-5373
• DOI: 10.1590/s1516-14392014005000041

The present study focuses on the effect of various degrees of plastic deformation generated by cold radial forging on the mechanical properties and the fracture morphology of 32 CDV 13 steel. The cold forging percentage was evaluated for 17.45, 33.30, 42.0 and 46.47%. The microstructural analysis of the steel shows tempered martensite. The tensile strength, yield strength and hardness were found to increase with the increase of cold forging percentage due to the energy stored in the material during cold forging. For higher cold forging percentage, the toughness of the material was decreased according to the reduction of absorbed energy obtained during deformation. Fractography of the Charpy impact specimens shows a surface roughness and dimple pattern for the steel as was acquired and for 17.45 and 33.3% of cold forging; while for 42 and 46.47% of cold forging a cleavage fracture pattern was observed.