Structural and Magnetic Properties of Duplex Stainless steel (UNS S31803) Powders Obtained by high Energy Milling of Chips with Additions of NbC

• Published in: Materials research (São Carlos, São Paulo, Brazil) Vol. 21; no. 1; p. 1
• Main Authors: Mendonça, Claudiney de Sales Pereira, Oliveira, Adhimar Flávio, Oliveira, Leonardo Albergaria, Silva, Manoel Ribeiro da, Melo, Mirian de Lourdes Noronha Motta, Silva, Gilbert
• Format: Journal Article
• Language: English
• Published: Sao Carlos Universidade Federal do Sao Carlos, Departamento de Engenharia de Materiais 01-01-2018; ABM, ABC, ABPol; Associação Brasileira de Metalurgia e Materiais (ABM); Associação Brasileira de Cerâmica (ABC); Associação Brasileira de Polímeros (ABPol)
• Subjects: Ball milling; chips; Duplex stainless steel; Duplex stainless steels; ENGINEERING, CHEMICAL; Magnetic properties; martensite; Martensitic stainless steels; MATERIALS SCIENCE, MULTIDISCIPLINARY; Mechanical alloying; Mechanical milling; METALLURGY & METALLURGICAL ENGINEERING; Morphology; Niobium carbide; Particle size; Particle size distribution; Powder metallurgy; Scanning electron microscopy; Stainless steel; Transformations; Weight; X-ray diffraction; particle size; magnetic properties; chips; morphology; niobium carbide; mechanical milling; Duplex stainless steel; martensite
• ISSN: 1516-1439; 1980-5373; 1980-5373
• DOI: 10.1590/1980-5373-mr-2017-0717

In this study, the high energy mechanical milling was utilized to the production of duplex stainless steel powders from the recycling chips with and without the addition niobium carbide. The effect of milling time and addition carbide on the morphology, particle size and magnetic properties of the powders was investigated. The utilization of the powder metallurgy constitute an important alternative for the reuse of waste in the industrial sector. The milling was realized using a planetary ball mill for 20 hours at a milling speed of 350 rpm and ball-to-powder weight ratio of 15:1were used, and the (0% and 3 wt. %) niobium carbide (NbC) addition. Scanning electron microscopy and particle distribution analysis were used for characterization of morphology and measure of particle size. Also, to analyze the transformations of phases were investigated using the magnetic characterization and x-ray diffraction. The results indicated that the addition of niobium carbide results in the reduction of the particle size of steel of the order of 20%, besides the reduces the transformation of austenite into strain induced martensitic phase.