Zobrazeno 1 - 10
of 78
pro vyhledávání: '"Wagner Viana Bielefeldt"'
Autor:
Augusto Lachini Pereira, Julio Aníbal Morales Pereira, Wagner Viana Bielefeldt, Antônio Cezar Faria Vilela
Publikováno v:
Scientific Reports, Vol 13, Iss 1, Pp 1-11 (2023)
Abstract This work showed an application of computational tools to understand systematically the behavior of viscosity on CSAM systems relevant to industrial uses. Consequently in this study, the viscosity experimental data obtained from the literatu
Externí odkaz:
https://doaj.org/article/4209c18cf1554b93b377187aafb9ff87
Autor:
Vinicius Cardoso da Rocha, Pedro Cunha Alves, Julio Aníbal Morales Pereira, Letícia Pegoraro Leal, Wagner Viana Bielefeldt, Antônio Cezar Faria Vilela
Publikováno v:
Journal of Materials Research and Technology, Vol 8, Iss 1, Pp 861-870 (2019)
Slags from the CaO–SiO2–Al2O3–MgO system (CSAM) are commonly employed for the secondary refining treatment of special steels. Those slags must be designed to work in the refining reactions, presenting properties that maximize their capability t
Externí odkaz:
https://doaj.org/article/28ff486c1a1f4d119891da42bc19d2ba
Autor:
Julio Aníbal Morales Pereira, Vinicius Cardoso da Rocha, Pedro Cunha Alves, Wagner Viana Bielefeldt, Antônio Cezar Faria Vilela
Publikováno v:
Materials Research, Vol 23, Iss 1 (2020)
Abstract Al2O3 (alumina) and MgO·Al2O3 (spinel) inclusions cause valve obstruction (clogging) in continuous casting and can deteriorate the quality of the final product. In this context, industrial heats of the bearing steel SAE 52100 was examined.
Externí odkaz:
https://doaj.org/article/5cf61ef2afa44ebfb9350fe8d36e9a11
Autor:
Pedro Cunha Alves, Vinicius Cardoso da Rocha, Julio Aníbal Morales Pereira, Wagner Viana Bielefeldt, Antônio Cezar Faria Vilela
Publikováno v:
Journal of Materials Research and Technology, Vol 7, Iss 3, Pp 387-394 (2018)
During the steel secondary refining, the elimination of impurities, adjustment of the chemical composition and adjustment of the temperature of the liquid steel occurs. The removal of non-metallic inclusions usually occurs in this step, being perform
Externí odkaz:
https://doaj.org/article/dbcd050c8ebb4719bed3f070736b8d3c
Autor:
Vinicius Cardoso da Rocha, Julio Aníbal Morales Pereira, Ayumi Yoshioka, Wagner Viana Bielefeldt, Antônio Cezar Faria Vilela
Publikováno v:
Materials Research, Vol 20, Iss 6, Pp 1480-1491 (2017)
The process of vacuum degassing occurs during the secondary refining of special steels. Its main function is to remove undesirable gases. However, during this process, flotation phenomenon and inclusions absorption are reported. The aim of the presen
Externí odkaz:
https://doaj.org/article/90d7562a8f6f40039dbb3112c5ea3e13
Autor:
Rodolfo Arnaldo Montecinos de Almeida, Deisi Vieira, Wagner Viana Bielefeldt, Antônio Cezar Faria Vilela
Publikováno v:
Materials Research, Vol 20, Iss 2, Pp 474-480 (2017)
Slag foaming is part of steelmaking process and could bring several benefits: it helps to save energy, improves productivity, enhances the refractory service life, decreases noise pollution and protects the bath from nitrogen incorporation. Unfortuna
Externí odkaz:
https://doaj.org/article/af9bffa6d5b444d2a20cd3e08b8526dd
Autor:
Deisi Vieira, Rodolfo Arnaldo Montecinos de Almeida, Wagner Viana Bielefeldt, Antônio Cezar Faria Vilela
Publikováno v:
Materials Research, Vol 19, Iss 5, Pp 1127-1131 (2016)
In steel mills that operate with electric arc furnaces (EAF), it is interesting to ensure greater stability to the electric arc to aim at less distortion in the electrical system, with consequent reduction in electric power consumption. The slag foam
Externí odkaz:
https://doaj.org/article/e409fb8d60d24ceb8dfa389956c1c857
Autor:
Ricardo Thomé da Cruz, Gustavo Frassini Pelisser, Wagner Viana Bielefeldt, Saulo Roca Bragança
Publikováno v:
Materials Research, Vol 19, Iss 2, Pp 408-412 (2016)
The secondary steel refining process uses filler sand as a thermal insulating barrier that separates the liquid metal from direct contact with slide-gate system of the steel ladle. The effective use of this practice must provide a high free opening r
Externí odkaz:
https://doaj.org/article/80fcb93537db45a4b11b3e4460d3607e
Autor:
Julio Aníbal Morales Pereira, Vinicius Cardoso da Rocha, Ayumi Yoshioka, Wagner Viana Bielefeldt, Antônio Cezar Faria Vilela
Publikováno v:
Materials Research, Vol 21, Iss 5 (2018)
Secondary refining slag samples with different chemical compositions (45-54 % CaO, 7-13 % Al2O3, 20-29 % SiO2, 9-16 % MgO, 0-5 % CaF2) were investigated to verify the influence of their effective viscosity on inclusion cleanliness of DIN 38MnS6 in a
Externí odkaz:
https://doaj.org/article/cb0a08eb2c9d409a9e2b80c08804ba83
Autor:
Bruna Goulart Bartosiaki, Julio Aníbal Morales Pereira, Wagner Viana Bielefeldt, Antônio Cezar Faria Vilela
Publikováno v:
Journal of Materials Research and Technology, Vol 4, Iss 3, Pp 235-240 (2015)
The search for increasingly cleaner steels has heightened the demand for additional analysis techniques, especially for the evaluation of inclusions in steel where greater cleanliness is required. A range of factors should be taken into account when
Externí odkaz:
https://doaj.org/article/a1427436f26143b887cfca2807190240