US3620289A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method for casting directionally solified articles
Assignee: RTX Corp
•
Filing: 1970-04-01
•
Granted: 1971-11-16
•
Expires: 1990-04-01
Abstract
Abstract Articles in which the crystalline structure is directionally controlled as, for example, in directionally solidified or single crystal articles are cast in individual molds with a mechanism to control the cooling rate and direction such that orientation of the crystalline structure is precisely controlled. A graphite susceptor surrounds the individual molds and in cooperation with a chill plate provides the necessary control of the cooling rate and direction.
Inventors
- 👤 Charles M Phipps Jr
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 17:48
CPC Classifications
B; B22; B22D; B22D27/00; B22D27/04; B22D27/045; C; C30; C30B; C30B11/00; C30B11/002; C30B11/003
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
83 words
In the process of producing directionally oriented castings the steps of providing a susceptor having a plurality of parallel openings therein, placing a mold in each of said openings, each mold having an article forming portion heating the susceptor and mold to a temperature above the melting point of the alloy, filling the article forming portion with molten alloy and then bringing a chill plate into contact with the end of the susceptor and with the ends of the molds in the susceptor.
Claim 2
Dependent Claim
83 words
In the process of producing directionally oriented castings the steps of providing a susceptor having a plurality of parallel openings therein, placing a mold in each of said openings, each mold having an article forming portion heating the susceptor and mold to a temperature above the melting point of the alloy, filling the article forming portion with molten alloy and then bringing a chill plate into contact with the end of the susceptor and with the ends of the molds in the susceptor.
Claim 3
Dependent Claim
30 words
The process of claim 1 in which the mold has a slug receiving cavity above the article forming portion to be melted during the heating of the mold and susceptor.
Claim 4
Dependent Claim
24 words
The process of claim 1 in which the heating is accomplished in part by a plurality of vertically spaced induction coils around the susceptor.
Claim 5
Dependent Claim
30 words
The process of claim 3 in which the induction coils are turned off successively from the chill plate to the top of the mold as solidification of alloy takes place.
Claim 6
Dependent Claim
106 words
The process of making, from high temperature alloys, castings in which the crystal structure is directionally oriented as in single crystal or directionally solidified castings, the steps of heating a plurality of molds in a susceptor having a plurality of openings to receive the individual molds therein, each mold having an article forming portion at the bottom heating the molds and susceptor to a temperature above the melting point of the alloy, filling at least the article forming portions of the molds with melted alloy, and contacting the bottom of the molds and the susceptor with a chill plate for solidifying the alloy in the molds.
Claim 7
Dependent Claim
106 words
The process of making, from high temperature alloys, castings in which the crystal structure is directionally oriented as in single crystal or directionally solidified castings, the steps of heating a plurality of molds in a susceptor having a plurality of openings to receive the individual molds therein, each mold having an article forming portion at the bottom heating the molds and susceptor to a temperature above the melting point of the alloy, filling at least the article forming portions of the molds with melted alloy, and contacting the bottom of the molds and the susceptor with a chill plate for solidifying the alloy in the molds.
Claim 8
Dependent Claim
47 words
The process as in claim 5 in which each mold has a circuitous passage formed in the mold at the extreme lower end for forming single crystal solidification, and contacting the extreme lower end of the mold with the chill plate to start solidification at this point.
Claim 9
Dependent Claim
49 words
The process as in claim 6 with the additional step of providing spaced induction coils around the susceptor for heating the susceptor and molds therein. 8 The process as in claim 7 with the additional step of placing the molds and susceptor in a vacuum furnace for additional heating.
Claim 10
Dependent Claim
43 words
The process as in claim 6 with the additional step of making each mold long enough above the article forming portion to receive a slug of alloy thereon, and placing such a slug in the mold prior to heating the mold and susceptor.
References Cited (Backward Citations)
US3234609A
Cited
US3435878A
Cited
US3376915A
Cited
US3366362A
Cited
US3346309A
Cited
US3435170A
Cited
US3405220A
Cited
US3417809A
Cited
US3385346A
Cited
US3401738A
Cited
US3515205A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-11-15 | 1975-05-17 | 1975-11-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-11-15 | 1979-05-17 | 1979-11-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-11-15 | 1983-05-17 | 1983-11-16 | $7700.00 | Window Closed / Lapsed |