Method for sintering a carbon steel part using a hydrocolloid binder as carbon source
AssigneeMetals Process Systems
InventorChrister Aslund
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Abstract
The invention refers to a new method for preparing sintered structural parts of carbon or tool steels or high speed steel having a carbon content of up to 2% by weight, wherein an agglomerated spherical powder comprising at least 0.5% of a thermo-reversible hydrocolloid is pressed to a green body of high density which is then heated at 450-650° C. to remove the non-carbon content of the hydrocolloid and subsequently sintered at about 1100-1400° C. to structural parts having high strength properties.
Claims6
A method for preparing a sintered structural steel part with a carbon content of up to 2% by weight, wherein an agglomerated spherical soft iron-based powder comprising at least 0.5% by weight of a thermo-reversible hydrocolloid as a binder is pressed to a green body of high density, characterized in that the green body is heated to a temperature of about 450-650° C. under a controlled atmosphere to remove the non-carbon content of the binder, and then sintered at a temperature of about 1100-1400° C. to allow the remaining carbon to diffuse homogeneously into the sintered body, giving structural parts of high density and having high strength properties.
Dependencies are inferred from the claim text.