The Role of Oxygen Transfer in Sintering of Low Alloy Steel Powder Compacts: A Review of the “Internal Getter” Effect

Abstract Ancorsteel 30 HP is a prealloyed low-alloy steel powder alloy with moderate hardenability. This datasheet provides information on composition, physical properties, hardness, and tensile properties. It also includes information on heat treating and powder metal forms. Filing Code: CS-151. Producer or source: Hoeganaes Corporation.

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The role of copper in microstructure and toughness of intercritically reheated coarse grained heat affected zone in a high strength low alloy steel

Materials Characterization ◽

10.1016/j.matchar.2021.111511 ◽

2021 ◽

pp. 111511

Author(s):

Jinliang Wang ◽

Wang Shuai ◽

Xiaohui Xi ◽

Gui Wang ◽

Liqing Chen

Keyword(s):

Alloy Steel ◽

Heat Affected Zone ◽

High Strength ◽

Coarse Grained ◽

Low Alloy Steel

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The Behaviour of Low Alloy Steel Powder during Uniaxial Cold Compaction – Influence of the Geometry

Journal of the Japan Society of Powder and Powder Metallurgy ◽

10.2497/jjspm.66.3 ◽

2019 ◽

Vol 66 (1) ◽

pp. 3-8

Author(s):

Ilaria CRISTOFOLINI ◽

Alberto MOLINARI ◽

Gianluca PEDERZINI ◽

Alex RAMBELLI

Keyword(s):

Alloy Steel ◽

Steel Powder ◽

Low Alloy Steel ◽

Cold Compaction

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Oxygen Transfer Reactions during Sintering of Ferrous Powder Compacts

Advanced Engineering Forum ◽

10.4028/www.scientific.net/aef.27.3 ◽

2018 ◽

Vol 27 ◽

pp. 3-13 ◽

Cited By ~ 1

Author(s):

Herbert Danninger ◽

Raquel de Oro Calderon ◽

Christian Gierl-Mayer

Keyword(s):

Oxygen Transfer ◽

Sintering Temperature ◽

Early Stage ◽

Oxygen Affinity ◽

Oxygen Removal ◽

Transfer Reactions ◽

Getter Effect ◽

Alloy Steels ◽

Powder Compacts ◽

Heating Up

Powder metallurgy products may be started from powders with widely varying oxygen affinity. Thus the natural oxygen content of the powder compacts also varies in reducibility in the early stages of sintering. Here it is shown that prealloyed powders containing Cr require higher temperatures for oxygen removal than e.g. unalloyed or Ni-Cu alloyed grades. In case of powder mixes of base iron powder with Cr, Mn or Si, oxygen transfer from Fe to the additive powders may occur during heating up to sintering temperature, the “internal getter effect”. A similar effect can be observed in Cr prealloyed powders in which iron oxides initially present on the powder surfaces are transformed to more stable oxides in a fairly early stage of heating. Finally, also the formation of CH4observed when sintering alloy steels containing Si, Mn or Cr in H2can be attributed to an oxygen transfer effect.

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