6 documents found, page 1 of 1
Microstructural characterization of grade 300 and grade 350 maraging steels and...
Flórez, Mauro Andrés Cerra; Pereira, Úrsula Cid; Cardoso, Jorge Luiz; Oliveira, Francisco José dos Santos; Araújo, Walney Silva; Ribas, Gemma FargasThe electrochemical behavior of solution-annealed grade 300 and grade 350 maraging steels subjected to two different aging temperatures in an aqueous hydrofluoric acid (HF) medium was evaluated. The microstructural and hardness studies showed the effects of the chemical composition and heat treatments on the material properties. Although it is not possible to observe them, the fine intermetallic composites depo...
Oxidation behavior of Maraging 300 Alloy exposed to nitrogen/water vapor atmosp...
Flórez, Mauro Andrés Cerra; Ribas, Gemma Fargas; Cardoso, Jorge Luiz; García, Antonio Manuel Mateo; Rovira, Joan Josep Roa; Bastos Neto, MoisésAging heat treatments in maraging steels are fundamental to achieve the excellent mechanical properties required in several industries, i.e., nuclear, automotive, etc. In this research, samples of maraging 300 alloy were aged using a novel procedure that combines different steps with two atmospheres (nitrogen and water vapor) for several hours. The oxidized surface layer was chemical, microstructural and microm...
Avaliação da resistência a corrosão de aços alto manganês e o aço 9% níquel em ...
Lima, Marcos Natan da Silva; Flórez, Mauro Andrés Cerra; Maia, Pedro Paulo Nunes; Araújo, Walney Silva; Abreu, Hamilton Ferreira Gomes deThe present study aims to evaluate the corrosion resistance of twohigh manganese steels with respect to the 9% Nickel steel in 0.001M NaCl electrolyte solution. For this research, twosteels with 22%, 27% manganese were used, and the alloy of 9% Nickel which is widely used in the petrochemical industry. The tests carried out to compare the corrosion resistance were the open circuit potential (OCP) and anodic lin...
Estudo da resistência à corrosão entre vergalhões com diferentes microestrutura...
Vieira, Matheus de Lima; Silva, Francisco Alberto Marreiros da Rocha da; Flórez, Mauro Andrés Cerra; Silva, Marcelo José Gomes da; Araújo, Walney SilvaThe rebar are produced by hot rolling process. In the process studied here there are two distinct production routes. Prior to the hot rolling process, one route uses the reheat step through the furnace, and the other uses the semi-finished steel product directly from the solidification process. When establishing a comparison between the routes, the obtained microstructures show some differences. The objective o...
Síntese e caracterização de um filme de óxido tipo espinélio obtido durante o t...
Flórez, Mauro Andrés Cerra; Sousa, Ana Beatriz Ferreira; Mata, Stephany Aparecida Santos da; Bastos Neto, Moisés; Silva, Marcelo José Gomes daThe aging treatment in maraging steels is very important for to acquire excellent mechanical properties, reasons of their applications in several types of industries. In nuclear industry, the initial motivation of this investiation, maraging steels are used in ultra-centrifugal parts for uranium enrichment. In view of this, this study aimed to producing, during the heat treatment, an oxide film that behaves as ...
Avaliação da resistência a corrosão de dois aços alto manganês e o aço 9% níque...
Flórez, Mauro Andrés Cerra; Vieira, Matheus de Lima; Guedes, Thiago César Souza; Araújo, Walney Silva; Silva, Marcelo José Gomes daThe present study aims to evaluate the corrosion resistance of two high Manganese steels in relation to the 9%Nickel steel in electrolyte solution 0.001M of H2SO4. For this research, two steelswith 22% and 26% of Manganese were used, and the 9% Nickel steel that is widely used in petrochemical industry. The tests carried out to compare the corrosion resistance are: Open Circuit Potential (OCP) and Anodic Linear...