Method of forming powder metal components having surface densification
AssigneeStackpole Limited
InventorsHuw David, Peter K. Jones, Roger Lawcock
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Abstract
A method for producing a powder metal article having a three dimensional shape and having at least one densified surface comprising: a) providing a blend of powdered metals; b) compacting said blend to form a pre-form having a general shape of said article; c) sintering said pre-form; d) densifying at least one cylindrical surface region of said pre-form; and, e) forming said pre-form to a final density and into the three dimensional shape of said article.
Claims21
A method for producing a powder metal article having a three dimensional shape and having at least one densified surface region, said method comprising:
- a) providing a blend of powdered metals;
- b) compacting the blend to form a pre-form having a general shape of the article, said preform being generally cylindrically shaped at a region corresponding to said at least one densified surface region;
- c) sintering said pre-form;
- d) densifying said at least one surface region of said pre-form;
- and,
- e) forming said pre-form to a desired final density and into a desired three dimensional shape of said article.
A method for producing a powder metal article having a three dimensional shape and having at least one densified surface region, said method comprising:
- a) providing a blend of powdered metals;
- b) compacting the blend to form a pre-form having a general shape of the article, said pre-form having a density of between 70% to 90% of the theoretical maximum density and being generally cylindrically shaped at a region corresponding to said at least one densified surface region;
- c) sintering said pre-form;
- d) densifying said at least one surface region of said pre-form to at least 80% of the theoretical maximum density;
- and,
- e) forming said pre-form to a desired final density and into a desired three dimensional shape of said article.
A powder metal pre-form having a general shape of a desired article, said pre-form having a density of between 70% to 90% of the theoretical maximum density and being generally cylindrically shaped at least one surface region.
Dependencies are inferred from the claim text.