Eventos Anais de eventos
COBEM 2017
24th ABCM International Congress of Mechanical Engineering
Recycling of duplex steel through of powder metallurgy with isostatic compaction
Submission Author:
Michele Stanziola , MG
Co-Authors:
Michele Stanziola, Claudiney Sales Pereira Mendonça, Mirian de Lourdes Noronha Motta Melo, Gilbert Silva, Bruno Gonçalves Andrade, Valesca Oliveira
Presenter: Michele Stanziola
doi://10.26678/ABCM.COBEM2017.COB17-2846
Abstract
High energy milling applied on duplex stainless steel chips resulting from machining was used in this research for waste recycling. The high energy milling was performed in a planetary ball mill with an addition of 3% vanadium carbide, in the time of 50 hours in argon atmosphere, rotation of 350 rpm and mass/ ball ratio of 1:20. Before compacting, the powder it was subjected to a tension relief treatment at 1050°C for 30 minutes. The samples were compacted in isostatic pressing and were sintered in vacuum at a 1250°C for 1 hour. By means of the granulometric analysis, it was verified that the milling resulted in particles with size around 49 μm. Through the X-ray diffraction analysis, it was observed that the powder resulting from the milling has a tendency to amorphized, while the same material after the stress relief treatment presented the ferrite, austenite and martensite phases, which remained even after sintering. There was a density of the sintered material of the 6.57 g/cm³ and porosity of 18%.
Keywords
Stainless steel duplex, Chips, High-energy ball milling, Isostatic pressing
