Agradecimentos: The authors would like to thank Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP – Projects 2009/08478-1 and 2011/19997-0), Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq – Project 47081-2006-6) and Fundação Coordenação de Aperfeiçoamento de Pessoal...

Agradecimentos: The authors would like to thank Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP – Projects 2009/08478-1 and 2011/19997-0), Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq – Project 47081-2006-6) and Fundação Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES) for the financial support received, and the Faculty of Mechanical Engineering at the University of Campinas (FEM/UNICAMP) for the infrastructure received

This paper proposes and tests new Fe-2.6wt%C-2.8wt%Cr-1.8wt%Si specially designed for thixoforming processing. Samples were heated to the semisolid state at 1195 °C and held at this temperature for 0, 30, 60 and 90s, and then subjected to compression tests. Two-platen compression tests were carried...

This paper proposes and tests new Fe-2.6wt%C-2.8wt%Cr-1.8wt%Si specially designed for thixoforming processing. Samples were heated to the semisolid state at 1195 °C and held at this temperature for 0, 30, 60 and 90s, and then subjected to compression tests. Two-platen compression tests were carried out in order to determine the semisolid behavior. The holding time in the semisolid range simulates the industrial heating process that is time-controlled rather than temperature controlled. Morphological characterization pointed to an as cast microstructure composed by pearlite matrix plus chromium based carbides and nodular graphite and heated conditions composed by pearlitic matrix plus chromium based carbides without free graphite. The semisolid behavior indicated that at 1195 °C the thixoforming procedure requires a maximum stress of 2.5 MPa and maximum apparent viscosity of 4.8x105 Pa.s for the 0s soaking time condition, 2.0 MPa and 4.6x105 Pa.s for 30 s, 1.7 MPa and 3.7x105 Pa.s for 60 s and 1.2MPa and 3.3x105 Pa.s for 90 s of holding time, best condition achieved

FUNDAÇÃO DE AMPARO À PESQUISA DO ESTADO DE SÃO PAULO - FAPESP

2009/08478-1; 2011/19997-0

CONSELHO NACIONAL DE DESENVOLVIMENTO CIENTÍFICO E TECNOLÓGICO - CNPQ

47081-2006-6

COORDENAÇÃO DE APERFEIÇOAMENTO DE PESSOAL DE NÍVEL SUPERIOR - CAPES

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