Iron-based powder containing chromium, molybdenum and manganese
AssigneeHöganäs AB
InventorsCaroline Lindberg, Per Engdahl
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Abstract
The invention concerns an iron-based powder for powder-metallurgically producing components by powder compacting and sintering. The powder which essentially consists of 0.7-2.0% of Mo, 0.2-2.5% by weight of Cr and 0-3.0% by weight of Cu, 0.05-0.25% by weight of Mn and 0.3-1.0% by weight of C, wherein Fe, Mo and Mn are present as a prealloyed, water atomised FeMoMn base powder, Cr is present as FeCr, Cu is present as a metal or partially prealloyed powder and C is present as a graphite, exhibits very interesting properties. The invention also includes a method for preparing sintered components from this iron powder.
Claims20
An iron-based powder for producing components by powder compacting and sintering essentially consisting of
- 0.7-2.0% by weight of Mo
- 0.2-2.5% by weight of Cr
- 0-3.0% by weight of Cu
- 0,05-0.25% by weight of Mn
- 0.3-1.0% by weight of C,
- the balance being Fe
- and not more than 1% by weight of inevitable impurities, characterised in that Fe,Mo and Mn are present as a prealloyed, water atomised FeMoMn base powder, Cr is present as FeCr, Cu is present as a metal powder or is partially prealloyed to the base powder and C is present as graphite.
A method of powder-metallurgically producing sintered components, characterised by using an iron-based powder which in addition to iron essentially consists of
- 0.7-2.0% by weight of Mo
- 0.2-2.5% by weight of Cr
- 0-3.0% by weight of Cu
- 0,05-0.25% by weight of Mn
- 0.3-1.0% by weight of C,
- the balance being Fe
- and not more than 1% by weight of inevitable impurities, wherein Fe,Mo and Mn are present as a prealloyed, water atomised FeMoMn base powder, Cr is present as FeCr, Cu is present as a metal or partially prealloyed powder and C is present as graphite;
- compacting the powder into the desired shape and sintering the compact at a temperature above 1150.degree. C.
Dependencies are inferred from the claim text.