Claims
- 1. Process for high speed fine wire-drawing comprising the following steps:
- (a) introducing a large diameter elongate workpiece into a wire-drawing machine having at least one reduction die;
- (b) lubricating the material during the drawing process with a fluorinated, inert fluid having a viscosity ranging from about 0.4 cSt to about 40 cSt and being selected from the group consisting of aliphatic perfluoroalkanes having the general formula C.sub.n F.sub.2n+2 ; perfluoromorpholines having the general formula C.sub.n F.sub.2n+1 ON, wherein n is at least 5, and a boiling point of at least 50.degree. C.; perfluoroamines having the general structure C.sub.n F.sub.2n+3 N, wherein n is at least 3, and a boiling point of at least 155.degree. C.; and highly fluorinated amines;
- (c) drawing the wire or rod through the die or dies lubricated with a perfluorocarbon fluid; and
- (d) repeating the process until the necessary wire size is obtained.
- 2. Process in accordance with claim 1 wherein, the material to be drawn is selected from the group consisting of refractory metals.
- 3. Process in accordance with any of claims 1-3 wherein the wire drawn has an average diameter between 5 mils (0.127 mm) and 20 mils (508 mm).
- 4. Process in accordance with claim 1 wherein the fluorinated, inert liquids comprise fluoroaliphatic compounds having 5 to 18 carbon atoms.
- 5. Process in accordance with claim 1 wherein the fluorinated, inert liquid compounds comprise at least one catenary heteroatom selected from the group consisting of divalent oxygen, hexavalent sulfur, or trivalent nitrogen and having a hydrogen content of less than 5% by weight.
- 6. Process in accordance with claim 1 wherein the perfluorocarbon fluid is selected from the group consisting of perfluoroalkanes.
- 7. Process in accordance with claim 1 wherein the perfluorocarbon fluid is selected from the group consisting of perfluoroamines.
- 8. Process in accordance with claim 1 wherein the perfluorocarbon fluid is selected from the group consisting of perfluoromorpholines.
- 9. Process in accordance with claim 2 wherein the refractory metal is tantalum.
- 10. Process in accordance with claim 5 wherein the one or more catenary heteroatoms has a hydrogen content of preferably less than 1% by weight.
- 11. Process in accordance with claim 6 wherein the perfluoroalkane is selected from the group consisting of perfluoropentane, perfluorohexane, perfluoroheptane, and perfluorooctane.
- 12. Process in accordance with claim 7 wherein the perfluoroamine is selected from the group consisting of perfluorotributylamine, perflurotriethylamine, perfluorotriisopropylamine, and perfluorotriamylamine.
- 13. Process in accordance with claim 8 wherein the perfluoromorpholine is selected from the group consisting of perfluoro-N-methylmorpholine, perfluoro-N-ethylmorpholine, and perfluoro-N-isopropylmorpholine.
Parent Case Info
This application is a continuation-in-part of co-pending U.S. patent application Ser. No. 08/439,525 filed 12 May, 1995, the disclosure of which is hereby incorporated by reference.
US Referenced Citations (6)
Continuation in Parts (1)
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Number |
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439525 |
May 1995 |
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