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US 7,682,558 B2Granted
Metallurgical powder composition
AssigneeHöGanäS AB (Publ)
InventorsPer Knutsson, Per-Olof Larsson, Hilmar Vidarsson
Life of this patent
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Abstract
A metallurgical composition is provided for making compacted parts, comprising: (a) at least about 80 percent by weight of an iron or iron-based powder; (b) up to about 20 percent by weight of at least one alloying powder; (c) from about 0.05 to about 2 percent by weight of a binding agent comprising a C14-C30 fatty alcohol; and (d) from about 0.001 to about 0.2 percent by weight of a flow agent.
Claims12
A metallurgical powder composition for making compacted parts, comprising:
- (a) at least about 80 percent by weight of an iron or iron-based powder;
- (b) up to about 20 percent by weight of at least one alloying powder;
- (c) from about 0.05 to less than 2 percent by weight of a binding agent comprising C14-C30 fatty alcohol;
- (d) from about 0.001 to about 0.2 percent by weight of a flow agent, and
- (e) an organic metal-free pulverulent lubricant selected from the group consisting of stearic amide, arachidic amide, behenic amide, stearylstearic amide, ethylene bis-stearamide, and combinations thereof,
- wherein the total amount of binding agent (c), flow agent (d), and organic metal-free lubricant (e) is from 0.1 to 2 percent by weight of said metallurgical powder composition, and wherein said binding agent (c) is present in a concentration of 10 to 90 percent by weight based on the total weight of said binding agent (c), said flow agent (d), and said organic metal-free lubricant (e).
3 more elements
A method of producing a metallurgical powder composition for making compacted parts, comprising:
- providing the following components:
- (a) at least about 80 percent by weight of an iron or iron-based powder, (b) up to about 20 percent by weight of at least one alloying powder, (c) from about 0.05 to less than 2 percent by weight of a binding agent comprising C14-C30 fatty alcohol, (d) from about 0.001 to 0.2 percent by weight of a flow agent and (e) an organic metal-free pulverulent lubricant selected from the group consisting of stearic amide, arachidic amide, behenic amide, stearylstearic amide, ethylene bis-stearamide, and combinations thereof, wherein the total amount of binding agent (c), flow agent (d), and organic metal-free lubricant (e) is from 0.1 to 2 percent by weight of said metallurgical powder composition, and wherein said binding agent (c) is present in a concentration of 10 to 90 percent by weight based on the total weight of said binding agent (c), said flow agent (d), and said organic metal-free lubricant (e),
- mixing said above components at a temperature above the melting point of said binding agent (c);
- and
- cooling the mixture.
2 more elements
Dependencies are inferred from the claim text.