Abstract: The metallurgical composition comprises a main particulate metallic material, for example iron or nickel, and at least one alloy element for hardening the main metallic material, which form a structural matrix; a particulate solid lubricant, such as graphite, hexagonal boron nitride or mixture thereof; and a particulate alloy element which is capable of forming, during the sintering of the composition conformed by compaction or by injection molding, a liquid phase, agglomerating the solid lubricant in discrete particles. The composition may comprise an alloy component to stabilize the alpha-iron matrix phase, during the sintering, in order to prevent the graphite solid lubricant from being solubilized in the iron. The invention further refers to the process for obtaining a self-lubricating sintered product.
Type:
Grant
Filed:
December 4, 2015
Date of Patent:
January 1, 2019
Assignees:
Whirlpool, S.A., Universidade Federal de Santa Catarina(UFSC), Lupatech S.A.
Abstract: The metallurgical composition includes a main particulate metallic material, for example iron or nickel, and at least one alloy element for hardening the main metallic material, which form a structural matrix; a particulate solid lubricant, such as graphite, hexagonal boron nitride or mixture thereof; and a particulate alloy element which is capable of forming, during the sintering of the composition conformed by compaction or by injection molding, a liquid phase, agglomerating the solid lubricant in discrete particles. The composition may include an alloy component to stabilize the alpha-iron matrix phase, during the sintering, in order to prevent the graphite solid lubricant from being solubilized in the iron. The invention further refers to a self-lubricating sintered product, obtained from the composition, and to the process for obtaining said product.
Type:
Grant
Filed:
September 9, 2009
Date of Patent:
January 26, 2016
Assignees:
Whirlpool S.A., Universidade Federal De Santa Catarina (UFSC), Lupatech S.A.
Abstract: Industrial plasma reactor for plasma assisted thermal debinding of power injection-molded parts is a reactor used for the plasma assisted debinding and sintering of metallic or ceramic parts produced by the powder injection molding process, comprising a vacuum chamber (1) containing a cathode-anode (7,8) system for plasma generation and a resistive heating system (6) in the same vacuum chamber (1) ambient.
Type:
Grant
Filed:
July 14, 2005
Date of Patent:
May 18, 2010
Assignee:
Lupatech S.A.
Inventors:
Ricardo Machado, Waldyr Ristow, Jr., Aloisio Nelmo Klein, Joel Louis Rene Muzart, Marcio Celso Fredel, Paulo Antonio Pereira Wendhausen, Davi Fusão, Paulo Roberto Alba, Nilton Francisco Oliveira da Silva, Luciano Antonio Mendes
Abstract: A process for the removal of binder material from powder injected molded parts that employs a low pressure plasma reactor to generate reactive species which react with the binder material in the injected molded part is presented. The reactive species cause the binder material to break down into smaller molecules and thereby be removed from the injected molded part.
Type:
Grant
Filed:
October 19, 2001
Date of Patent:
June 17, 2003
Assignee:
LupaTech S.A.
Inventors:
Aloisio Nelmo Klein, Joel Louiz R. Muzart, Antonio Rogerio Souza, Marcio Celso Fredel, Paulo Antonio Pereira Wendhausen, Maribondo do Nascimento Rubens