Published 1987 | Version v1
Miscellaneous Open

Sintered steels of high resistance alloyed to Nb, Mo, Mn and Si

Creators

  • 1. Santa Catarina Univ., Florianopolis (Brazil)

Description

Sinterability, homogenization and mechanical properties of Nb-Mo-Mn-Si alloyed steels obtained by means of compaction and sintering at 12500C, are investigated on the basis of dilatometry, microstructural analysis, and tensile and hardness properties. The alloy components are combined on a single master alloy (in adequate proportions) wich presents only phases with easy dissolution ib iron, resulting in improvement of the kinectics of sintering and homogenization processes. Optimal compositions show simultaneously an excelent dimensional stability during sintering and strength superior to 920 MPa and up to 1250 MPa when an additional heat treatment is made. (Author)

Availability note (English)

MF available from INIS under the Report Number.

Abstract (Portuguese)

A sinterizacao, homogeneizacao e propriedades mecanicas de acos obtidos por compactacao a frio e sinterizacao a 12500C, utilizando os elementos de liga Nb, Mo, Mn e Si, sao analisadas com base em resultados dilatometricos e microestruturais, e ensaios de tracao e dureza. Os elementos de liga encontram-se todos, nas proporcoes adequadas, numa unica liga mestre (masteralloy) que apresenta somente fases de facil dissolucao no ferro, influenciando beneficamente a cinetica dos processos de sinterizacao e homogeneizacao. Composicoes otimas mostram uma excelente estabilidade dimensional durante a sinterizacao, associada a resistencias superiores a 920MPa ou ate 1250MPa quando da realizacao de tratamentos termicos adicionais. (Autor)

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Additional details

Additional titles

Original title (Portuguese)
Acos sinterizados de elevada resistencia ligados ao Nb, Mo, Mn e Si

Publishing Information

Imprint Pagination
8 p.
Report number
INIS-BR--804

Conference

Title
2. Meeting on Technology and Utilization of Brazilian Steels.
Dates
18-22 May 1987.
Place
Rio de Janeiro, RJ (Brazil).

INIS

Country of Publication
Brazil
Country of Input or Organization
Brazil
INIS RN
18075912
Subject category
S36: MATERIALS SCIENCE; S36: MATERIALS SCIENCE;
Resource subtype / Literary indicator
Conference
Descriptors DEI
MANGANESE; MECHANICAL PROPERTIES; MOLYBDENUM; NIOBIUM; POWDER METALLURGY; SILICON; SINTERING; STEELS; TEMPERATURE DEPENDENCE
Descriptors DEC
ALLOYS; CARBON ADDITIONS; ELEMENTS; FABRICATION; IRON ALLOYS; IRON BASE ALLOYS; METALLURGY; METALS; SEMIMETALS; TRANSITION ELEMENTS