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Obtention, machining and wear of sintered alloys for automotive applications; Processamento, usinagem e desgaste de ligas sinterizadas para aplicacoes automotivas

Abstract

The aim of this work was the development of materials for automotive applications, in particular, valve seat inserts for gasoline combustion engines. The development involved the following activities: processing by powder metallurgy techniques, heat treatment, mechanical and microstructural characterization, machining and wear of materials. This work was undertaken aiming cost reduction of this component by the use of cheaper and less pollutant elements, eliminating the presence of Co and Pb due to their high cost and toxicological effects, respectively. The accomplishment of a thorough research into patents revealed that the materials studied here present particular compositions and were not yet produced. The results of hardness measurements and the transverse radial strength of the studied materials, after heat treatment, revealed superior properties than the commercial alloys applied at the moment. The machining tests of the material without heat treatment indicated a similar behaviour in comparison to the commercial alloy, suggesting that the new alloy chemistry composition was not deleterious in this sense. After heat treatment, the obtained alloys presented a cutting force increase in relation to the commercial alloy. Wear tests results of heat treated materials presented smaller friction coefficient and mass loss than the commercial alloy, in ali cases. This  More>>
Publication Date:
Jul 01, 2006
Product Type:
Thesis/Dissertation
Report Number:
INIS-BR-4104
Resource Relation:
Other Information: TH: Tese (Ph.D.); 120 refs., figs., tabs. Also available from the Library of the Brazilian Nuclear and Energy Research Institute (CNEN/IPEN), Sao Paulo, SP
Subject:
36 MATERIALS SCIENCE; EXPERIMENTAL DATA; HEAT TREATMENTS; MACHINING; NIOBIUM CARBIDES; POWDER METALLURGY; SCANNING ELECTRON MICROSCOPY; SINTERED MATERIALS; SINTERING; TEMPERATURE RANGE 1000-4000 K; TITANIUM CARBIDES; TUNGSTEN CARBIDES; WEAR
OSTI ID:
20871692
Research Organizations:
Instituto de Pesquisas Energeticas e Nucleares (IPEN), Sao Paulo, SP (Brazil)
Country of Origin:
Brazil
Language:
Portuguese
Other Identifying Numbers:
TRN: BR0746354039529
Availability:
Available from INIS in electronic form
Submitting Site:
BRN
Size:
164 pages
Announcement Date:
Jun 06, 2007

Citation Formats

Jesus Filho, Edson Souza de. Obtention, machining and wear of sintered alloys for automotive applications; Processamento, usinagem e desgaste de ligas sinterizadas para aplicacoes automotivas. Brazil: N. p., 2006. Web.
Jesus Filho, Edson Souza de. Obtention, machining and wear of sintered alloys for automotive applications; Processamento, usinagem e desgaste de ligas sinterizadas para aplicacoes automotivas. Brazil.
Jesus Filho, Edson Souza de. 2006. "Obtention, machining and wear of sintered alloys for automotive applications; Processamento, usinagem e desgaste de ligas sinterizadas para aplicacoes automotivas." Brazil.
@misc{etde_20871692,
title = {Obtention, machining and wear of sintered alloys for automotive applications; Processamento, usinagem e desgaste de ligas sinterizadas para aplicacoes automotivas}
author = {Jesus Filho, Edson Souza de}
abstractNote = {The aim of this work was the development of materials for automotive applications, in particular, valve seat inserts for gasoline combustion engines. The development involved the following activities: processing by powder metallurgy techniques, heat treatment, mechanical and microstructural characterization, machining and wear of materials. This work was undertaken aiming cost reduction of this component by the use of cheaper and less pollutant elements, eliminating the presence of Co and Pb due to their high cost and toxicological effects, respectively. The accomplishment of a thorough research into patents revealed that the materials studied here present particular compositions and were not yet produced. The results of hardness measurements and the transverse radial strength of the studied materials, after heat treatment, revealed superior properties than the commercial alloys applied at the moment. The machining tests of the material without heat treatment indicated a similar behaviour in comparison to the commercial alloy, suggesting that the new alloy chemistry composition was not deleterious in this sense. After heat treatment, the obtained alloys presented a cutting force increase in relation to the commercial alloy. Wear tests results of heat treated materials presented smaller friction coefficient and mass loss than the commercial alloy, in ali cases. This was especially achieved due to the advantages offered by heat treatment allied to the addition of NbC and Ti/W carbides. The materials obtained here showed to be potential candidates to substitute with advantages, valve seat inserts made of Fe-Co alloys for gasoline combustion engines. (author)}
place = {Brazil}
year = {2006}
month = {Jul}
}