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Aço fundido bainítico com elevada resistência mecânica

Aço fundido bainítico com elevada resistência mecânica

          
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About the Book

Apresenta-se um tipo de aço fundido com estrutura nanoestruturada de bainita. Este aço não necessita de processamento termomecânico, pode ser produzido em grandes peças e apresenta a resistência mecânica em GPa. A estrutura especial consiste de finas placas de ferrita envolvidas por austenita retida supersaturada de carbono. O presente trabalho mostra os primeiros resultados do aço pesquisado no Brasil. O aço foi produzido em condições convencionais de fundição ao ar. A técnica dilatométrica foi utilizada para desenvolvimento dos ciclos térmicos. Foram obtidas combinações de resistência á tração e alongamento da ordem de 2,1 GPa e 1%; 1,7 GPa e 15%, respectivamente, para austêmpera a 200 e 300°C. Apresentam-se resultados inéditos de resistência à fadiga de alto ciclo por flexão rotativa com limite de vida a 10 milhões de ciclos, sendo obtido resultado de 593 MPa para austêmpera a 200°C e 516 MPa para austêmpera a 300°C. Esses resultados de resistência à fadiga são mais elevados do que os apresentados por importantes materiais de engenharia como os aços forjados e ferros fundidos nodulares austemperado.


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Product Details
  • ISBN-13: 9783639695205
  • Publisher: Novas Edicoes Academicas
  • Binding: Paperback
  • Language: Portuguese
  • Returnable: N
  • Spine Width: 11 mm
  • Width: 152 mm
  • ISBN-10: 3639695208
  • Publisher Date: 09 Oct 2014
  • Height: 229 mm
  • No of Pages: 184
  • Series Title: Portuguese
  • Weight: 276 gr


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