Tin-containing iron base powder and process for making

Details Tin-containing iron base powder and process for making Tin-containing iron base powder and process for making

C - Chemistry, Metallurgy

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C

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C22C 38/00 (2006.01) B22F 1/02 (2006.01) B22F 9/22 (2006.01) C23C 20/04 (2006.01) H01F 1/06 (2006.01)

Patent

CA 1239812

ABSTRACT The invention provides a tin-containing iron base powder comprising iron base particulates each having tin-rich portions on the surface in which at least a part of the tin forms a compound with iron, wherein the total tin content ranges from 1 to 20% by weight of the powder. The invention also provides a process for making such a tin-containing iron base powder by mixing an iron base powder with a powder tin compound capable of generating metallic tin upon thermal decomposition, and heating the mixture to a temperature of 450 to 700°C in a reducing or non-oxidizing atmosphere. Using this tin-containing iron base powder as a sintering material, there can be obtained sintered products having a high density and excellent magnetic properties.

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