High Strength Sintered Steels Fabrication by In-Situ Solid Solution Strengthening and Grain Growth Prevention During Sintering

Due to the known Powder Metallurgy advantages of sintered structural steel parts fabrication, intensive researches are performed to overcome its known limitations concerning realizable mechanical properties. Both solid solution dispersion strengthening and crystal grain refining are known methods of...

Full description

Saved in:
Bibliographic Details
Published inEuropean Congress and Exhibition on Powder Metallurgy. European PM Conference Proceedings pp. 1 - 6
Main Authors Orban, Radu L, Orban, Magdalena, Sechel, Niculina, Dihoru, Luiza
Format Conference Proceeding
LanguageEnglish
Published Shrewsbury The European Powder Metallurgy Association 01.01.2016
Subjects
Alloys
Carbides
Dispersion strengthening
Grain growth
Grain refinement
Graphite
Handbooks
High strength low alloy steels
Homogenization
Mechanical properties
Microalloying
Niobium
Oxidation
Oxidation resistance
Powder metallurgy
Precipitation hardening
Prevention
Sintering
Sintering (powder metallurgy)
Solid solutions
Solution strengthening
Steel
Structural steels
Titanium
Vanadium
United Kingdom > UK
United States > US
Israel
Online AccessGet full text

Cover

More Information
Summary:Due to the known Powder Metallurgy advantages of sintered structural steel parts fabrication, intensive researches are performed to overcome its known limitations concerning realizable mechanical properties. Both solid solution dispersion strengthening and crystal grain refining are known methods of mechanical properties of alloys enhancing. They are successfully applied to HSLA wrought steels elaboration by microalloying with interstitial carbide/nitide/carbonitride forming elements (Nb, V, Ti). Unfortunately, this method was not yet extended to sintered steels, probably due to difficulties to prevent oxidation of microalloying elements - with high affinity for oxygen, and also to assure their good homogenization with the iron base powder at the required small proportions. Only few information are published on this matter. This paper presents a synthesis of results obtained by authors concerning possibilities of Nb, V and Ti carbides/nitrides formation in the Fe matrix at sintering, of their oxidation prevention and good homogenization to overcome mentioned difficulties, appropriate technological routes being proposed.