Patent US4281528A successfully refreshed from Google Patents.
US4281528A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for isothermally shaping a titanium-containing metal workpiece
Assignee: Northrop Grumman Space and Mission Systems Corp
•
Filing: 1978-07-27
•
Granted: 1981-08-04
•
Expires: 1998-07-27
Abstract
Abstract There is provided an improved process for isothermal shaping of a titanium-containing workpiece in a hot die. A precoat lubricant composition including a glassy component and a solid lubricant such as graphite dispersed in an organic medium is applied to the workpiece, and the workpiece heated to a temperature sufficient to remove the organic medium to leave a residue of glassy material and graphite on the workpiece. The workpiece is then inserted in a heated split die, and the die loaded to alter the shape of the workpiece. The ratio of the solid lubricant to the glassy component is at least one to one. The particle size of the glassy component is important to the surface character of the finally shaped workpiece.
Inventors
- 👤 William D. Spiegelberg
- 👤 Donald J. Moracz
- 👤 Frank N. Lake
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 19:00
CPC Classifications
C; C10; C10M; C10M103/00; B; B21; B21J; B21J3/00; C10M2201/00; C10M2201/04; C10M2201/041; C10M2201/042; C10M2201/06; C10M2201/061; C10M2201/062; C10M2201/063; C10M2201/10; C10M2201/102; C10M2201/105; C10M2201/12; C10M2201/16; C10M2201/18; C10M2205/00; C10M2205/02; C10M2205/022; C10M2205/024; C10M2205/026; C10M2205/04; C10M2205/14; C10M2209/00; C10M2209/02; C10M2209/08; C10M2209/084; C10M2209/10; C10M2209/101; C10M2211/00; C10M2211/06; C10M2213/00; C10M2213/02; C10M2213/06; C10M2213/062; C10M2217/00; C10M2217/02; C10M2217/026; C10M2229/00; C10M2229/02; C10M2229/04; C10M2229/041; C10M2229/05; C10N; C10N2010/00; C10N2010/02; C10N2010/04; C10N2040/00; C10N2040/20; C10N2040/24; C10N2040/241; C10N2040/242; C10N2040/243; C10N2040/244; C10N2040/245; C10N2040/246; C10N2040/247
Claims Analysis
Total Claims: 14
Claim 1
Independent Claim
198 words
A process for isothermally shaping a titanium-containing metal workpiece in a hot die including the steps of providing a precoat separation lubrication composition which is a liquid dispersion of a vitreous component and a finely divided solid lubricant selected from graphite, boron nitride and mixtures of graphite and boron nitride in a solution of an organic solvent and a resin binder soluble in said solvent and wherein the particle size of the vitreous component and the solid lubricant is less than about 200 mesh, U.S. Standard sieve size, and the weight ratio of solid lubricant to vitreous component is at least 1:1, said vitreous component having a melting point above 800° F. and below the temperature of isothermal shaping, coating said workpiece with said precoat composition, heating said workpiece to attain a temperature between 1000° F. and 1400° F. for from 1 to 30 minutes to volatilize the organic solvent and thermally decompose the resin binder to leave a residue of vitreous material and solid lubricant on said workpiece, transferring the workpiece in a preheated die system, attaining a temperature of from 1350° F. to 1750° F. and loading said die to alter the shape of said workpiece.
Claim 2
Dependent Claim
198 words
A process for isothermally shaping a titanium-containing metal workpiece in a hot die including the steps of providing a precoat separation lubrication composition which is a liquid dispersion of a vitreous component and a finely divided solid lubricant selected from graphite, boron nitride and mixtures of graphite and boron nitride in a solution of an organic solvent and a resin binder soluble in said solvent and wherein the particle size of the vitreous component and the solid lubricant is less than about 200 mesh, U.S. Standard sieve size, and the weight ratio of solid lubricant to vitreous component is at least 1:1, said vitreous component having a melting point above 800° F. and below the temperature of isothermal shaping, coating said workpiece with said precoat composition, heating said workpiece to attain a temperature between 1000° F. and 1400° F. for from 1 to 30 minutes to volatilize the organic solvent and thermally decompose the resin binder to leave a residue of vitreous material and solid lubricant on said workpiece, transferring the workpiece in a preheated die system, attaining a temperature of from 1350° F. to 1750° F. and loading said die to alter the shape of said workpiece.
Claim 3
Dependent Claim
14 words
A process in accordance with claim 1 in which the solid lubricant is graphite.
Claim 4
Dependent Claim
182 words
A process for isothermally forging a titanium-containing metal workpiece in a hot superalloy die including the step of providing a precoat separation lubrication composition which is a liquid dispersion of a vitreous component and graphite in a solution of an organic solvent and a resin binder soluble in said solvent and wherein the graphite size of the vitreous component and the graphite is less than about 200 mesh, U.S. Standard sieve size, and the weight ratio of the graphite to the vitreous component is from 1:1 to 5.67:1, said vitreous component having a melting point above 800° F. and less than the temperature of isothermal forging, coating said workpiece with said precoat lubricant composition, heating said workpiece to attain a temperature between 1000° F. and 1400° F. for from 1 to 30 minutes to volatilize the organic solvent and thermally decompose the resin binder to leave a residue of vitreous material and graphite on said workpiece, transferring the workpiece in a preheated die system, attaining a temperature of from 1350° F. to 1750° F., and loading said die to forge said workpiece.
Claim 5
Dependent Claim
182 words
A process for isothermally forging a titanium-containing metal workpiece in a hot superalloy die including the step of providing a precoat separation lubrication composition which is a liquid dispersion of a vitreous component and graphite in a solution of an organic solvent and a resin binder soluble in said solvent and wherein the graphite size of the vitreous component and the graphite is less than about 200 mesh, U.S. Standard sieve size, and the weight ratio of the graphite to the vitreous component is from 1:1 to 5.67:1, said vitreous component having a melting point above 800° F. and less than the temperature of isothermal forging, coating said workpiece with said precoat lubricant composition, heating said workpiece to attain a temperature between 1000° F. and 1400° F. for from 1 to 30 minutes to volatilize the organic solvent and thermally decompose the resin binder to leave a residue of vitreous material and graphite on said workpiece, transferring the workpiece in a preheated die system, attaining a temperature of from 1350° F. to 1750° F., and loading said die to forge said workpiece.
Claim 6
Dependent Claim
169 words
A process for isothermally sizing a titanium-containing metal workpiece in a hot superalloy die including the steps of providing a precoat separation lubrication composition which is a liquid dispersion of a vitreous component and graphite in a solution of an organic solvent and a resin binder soluble in said solvent and wherein the particle size of the vitreous component and the graphite is less than about 200 mesh, U.S. Standard sieve size, and the weight ratio of the graphite to the vitreous component is from 1:1 to 9.5:1, coating said workpiece with said precoat lubricant composition, heating said workpiece to attain a temperature between 1000° F. and 1400° F. for from 1 to 30 minutes to volatilize the organic solvent and thermally decompose the resin binder to leave a residue of vitreous material and graphite on said workpiece, transferring the workpiece into a preheated sizing die system, attaining a temperature of from 1350° F. to 1750° F. and loading said die to shape said workpiece to its final size.
Claim 7
Dependent Claim
169 words
A process for isothermally sizing a titanium-containing metal workpiece in a hot superalloy die including the steps of providing a precoat separation lubrication composition which is a liquid dispersion of a vitreous component and graphite in a solution of an organic solvent and a resin binder soluble in said solvent and wherein the particle size of the vitreous component and the graphite is less than about 200 mesh, U.S. Standard sieve size, and the weight ratio of the graphite to the vitreous component is from 1:1 to 9.5:1, coating said workpiece with said precoat lubricant composition, heating said workpiece to attain a temperature between 1000° F. and 1400° F. for from 1 to 30 minutes to volatilize the organic solvent and thermally decompose the resin binder to leave a residue of vitreous material and graphite on said workpiece, transferring the workpiece into a preheated sizing die system, attaining a temperature of from 1350° F. to 1750° F. and loading said die to shape said workpiece to its final size.
Claim 8
Dependent Claim
25 words
A process according to any of claims 1, 2, 3, and 4 wherein the vitreous component includes B 2 O 3 and SiO 2 .
Claim 9
Dependent Claim
44 words
A process according to any of claims 1, 2, 3, and 4 wherein the precoat lubricant composition as applied to the workpiece is from 5% to 30% by weight of combined vitreous component and graphite, with the balance being organic solvent and resin binder.
Claim 10
Dependent Claim
26 words
A process according to any of claims 1, 2, 3, and 4 wherein the particle size of the vitreous component and the graphite is 10 microns.
Claim 11
Dependent Claim
21 words
A process according to any of claims 1, 2, 3, and 4 wherein the resin binder is a polymethyl silicone resin.
Claim 12
Dependent Claim
21 words
A process according to any of claims 1, 2, 3, and 4 wherein the resin binder is a polymethyl methacrylate resin.
Claim 13
Dependent Claim
18 words
A process according to claims 1, 2, 3, and 4 wherein the resin binder is a polystyrene resin.
Claim 14
Dependent Claim
20 words
A process according to any of claims 1, 2, 3, and 4 wherein the resin binder is a polybutene resin.
References Cited (Backward Citations)
GB905989A
Cited
US3154849A
Cited
US3254401A
Cited
US3384581A
Cited
US3411564A
Cited
US3584487A
Cited
US3635068A
Cited
US3575858A
Cited
US3840461A
Cited
US4096076A
Cited
US4055975A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1984-08-03 | 1985-02-02 | 1985-08-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1988-08-03 | 1989-02-02 | 1989-08-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1992-08-03 | 1993-02-02 | 1993-08-04 | $7700.00 | Window Closed / Lapsed |