[특허]Method of forming high strength aluminum alloy parts containing L12 intermetallic dispersoids by ring rolling

[미국특허] Method of forming high strength aluminum alloy parts containing L12 intermetallic dispersoids by ring rolling 원문보기

IPC분류정보
국가/구분	United States(US) Patent 등록
국제특허분류(IPC7판)	C22F-001/04 C22C-021/02 C22F-001/043 B22F-003/17 B22F-005/10 C22C-001/04 C22C-021/00 C22C-021/06 C22C-021/08 C22C-021/10 C22C-021/12 C22C-021/14 C22C-021/16 C22C-021/18 B22F-009/08
출원번호	US-0578889 (2009-10-14)
등록번호	US-9194027 (2015-11-24)
발명자 / 주소	Pandey, Awadh B.
출원인 / 주소	United Technologies Corporation
대리인 / 주소	Kinney & Lange, P.A.
인용정보	피인용 횟수 : 0 인용 특허 : 76

초록 ▼

A method and apparatus produces high strength aluminum alloy parts from a powder containing L12 intermetallic dispersoids. The powder is degassed, sealed under vacuum in a container, heated, consolidated into billet form by vacuum hot pressing. The billet is then shaped into a ring preform by extrus

대표청구항 ▼

1. A method for forming a ring rolled high strength aluminum alloy part containing L12 dispersoids, comprising the steps of: placing a quantity of a powder containing L12 Al3X dispersoids in an aluminum alloy matrix consisting of a matrix element that is 4-25 weight % silicon, 0.2-6 weight % copper and/or 3-12 weight % zinc, and the balance aluminum in a container wherein X is at least one first element selected from the group consisting of about 0.1 to about 15.0 weight percent thulium, about 0.1 to about 25.0 weight percent ytterbium, and about 0.1 to about 25.0 weight percent lutetium; and at least one second element selected from the group consisting of about 0.1 to about 20.0 weight percent gadolinium, about 0.1 to about 20.0 weight percent yttrium, and about 0.05 to about 10.0 weight percent hafnium;the powder having a mesh size of less than 450 mesh;vacuum degassing the powder at a temperature of about 300° F. (149° C.) to about 900° F. (482° C.) for about 0.5 hours to about 8 days;sealing the degassed powder in the container under vacuum;heating the sealed container to about 300° F. (149° C.) to about 900° F. (482° C.) for about 15 minutes to eight hours;vacuum hot pressing the heated container to form a billet;removing the container from the formed billet;forging the billet into a ring preform using an anvil and hammer, such that the preform is donut shaped, having a first diameter and wall thickness; andring rolling the preform to substantially decrease the wall thickness and increase the diameter into a finished product. 2. The method of claim 1, wherein the container is aluminum having a configuration with a central axis, and vacuum hot pressing is done along the axis while restraining radial movement of the container. 3. The method of claim 1, wherein the vacuum hot pressing includes blind die compaction for about 1 minute to about 8 hours at a temperature of 300° F. (149° C.) to about 900° F. (482° C.) under uni-axial pressure of about 5 ksi (35 MPa) to about 100 ksi (690 MPa). 4. The method of claim 1, wherein the forging temperatures are between about 300° F. (149° C.) and 900° F. (482.2° C.). 5. The method of claim 1, wherein the rolling temperatures are between about 400° F. (204.4° C.) and 900° F. (482.2° C.). 6. The method of claim 1, wherein the matrix element is 4-25 weight % silicon.

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[미국특허] Method of forming high strength aluminum alloy parts containing L12 intermetallic dispersoids by ring rolling 원문보기

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[미국특허] Method of forming high strength aluminum alloy parts containing L12 intermetallic dispersoids by ring rolling 원문보기

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