Tungsten alloys for penetrator application and method of making the same
원문보기
IPC분류정보
국가/구분
United States(US) Patent
등록
국제특허분류(IPC7판)
B22F-003/14
C22C-001/04
C22C-027/04
F42B-012/06
출원번호
US-0540620
(1995-10-27)
발명자
/ 주소
Kapoor, Deepak
출원인 / 주소
The United States of America as represented by the Secretary of the Army
인용정보
피인용 횟수 :
8인용 특허 :
10
초록▼
Disclosed is a flow-softening tungsten alloy having the general formula:W100-pAiBjCkDe wherein W is tungsten; A is one or more elements selected from the group consisting of nickel, iron, chromium and cobalt; B is in or more elements selected from the group consisting of molybdenum, niobium and tant
Disclosed is a flow-softening tungsten alloy having the general formula:W100-pAiBjCkDe wherein W is tungsten; A is one or more elements selected from the group consisting of nickel, iron, chromium and cobalt; B is in or more elements selected from the group consisting of molybdenum, niobium and tantalum; C is one or more of the elements selected from the groups consisting of titanium and aluminum; D is one or more elements selected from the group consisting of boron, carbon, and silicon; i is from about 5 to about 8 weight percent; j is from 0 to about 4 weight percent; k is from about 0.1 to about 4 weight percent; 1 is from 0 to about 0.1 weight percent; and p is greater than or equal to about 7 weight percent and less than or equal to about 20 weight percent. In this alloy p is approximately equal to the sum of i, j, k and 1. A method of preparing this alloy and a kinetic energy penetrator manufactured from it are also disclosed.
대표청구항▼
1. A composition comprising a metallic alloy having the general formula:W100-pAiBjCkDewherein W is tungsten; A is one or more elements selected from the group consisting of nickel, iron, chromium and cobalt; B is in or more elements selected from the group consisting of molybdenum, niobium and tanta
1. A composition comprising a metallic alloy having the general formula:W100-pAiBjCkDewherein W is tungsten; A is one or more elements selected from the group consisting of nickel, iron, chromium and cobalt; B is in or more elements selected from the group consisting of molybdenum, niobium and tantalum; C is one or more of the elements selected from the groups consisting of titanium and aluminum; D is one or more elements selected from the group consisting of boron, carbon, and silicon; i is from about 5 to about 8 weight percent; j is from 0 to about 4 weight percent; k is from about 0.1 to about 4 weight percent; l is from 0 to about 0.1 weight percent; and p is greater than or equal to about 7 weight percent and less than or equal to about 20 weight percent.2. The composition of claim 1 wherein p is approximately equal to the sum of i, j, k and l.3. The composition of claim 1 which exhibits flow-softening characteristics.4. The composition of claim 1 wherein the composition has a microstructure without intermetallic phases.5. The composition of claim 1 wherein the composition has a microstructure with an aluminide phase.6. The composition of claim 1 wherein the composition and amount of A, B, C and D are adjusted to form a thermomechanically unstable phase.7. A method for preparing a flow-softening tungsten alloy comprising the steps of:(a) forming a mixture of metallic powders having the general formula: W100-pAiBjCkDewherein W is tungsten; A is one or more elements selected from the group consisting of nickel, iron, chromium and cobalt; B is in or more elements selected from the group consisting of molybdenum, niobium and tantalum; C is one or more of the elements selected from the groups consisting of titanium and aluminum; D is one or more elements selected from the group consisting of boron, carbon, and silicon; i is from about 5 to about 8 weight percent; j is from 0 to about 4 weight percent; k is from about 0.1 to about 4 weight percent; l is from 0 to about 0.1 weight percent; and p is greater than or equal to about 7 weight percent and less than or equal to about 20 weight percent; and(b) hot consolidating the mixture formed in step (a). 8. The method of claim 7 wherein in step (a) p is approximately equal to the sum of i, j, k and l.9. The method of claim 7 wherein in step (a) the mixture comprises high purity elemental powders.10. The method of claim 7 wherein in step (a) the mixture comprises a prealloyed powder corresponding to the components of the desired alloy.11. The method of claim 7 wherein in step (a) the mixture contains a uniform distribution of tungsten particles in a continuous and homogeneous matrix.12. The method of claim 7 wherein in step (a) the metallic powders are thoroughly blended.13. The method of claim 8 wherein in step (b) the powder mixture is hot consolidated at temperatures which are high enough to achieve near full density but which are lower than the incipient melting temperatures of A, B, C and D.14. The method of claim 7 wherein in step (b) the powder mixture is hot consolidated at temperatures which are high enough to achieve near full density but lower than the incipient melting temperatures of the prealloyed powder.15. The method of claim 7 wherein in step (b) hot consolidation is carried out by hot isostatic pressing.16. The method of claim 7 wherein in step (b) hot consolidation is carried out by hot extrusion.17. The method of claim 7 wherein in step (b) hot consolidation is carried out by hot pressing.18. A kinetic energy penetrator comprised of a composition having the general formula:W100-pAiBjCkDewherein W is tungsten; A is one or more elements selected from the group consisting of nickel, iron, chromium and cobalt; B is in or more elements selected from the group consisting of molybdenum, niobium and tantalum; C is one or more of the elements selected from the groups consisting of titanium and aluminum; D is one or more elements selected from the group consisting of boron, carbon, and silicon; i is from about 5 to about 8 weight percent; j is from 0 to about 4 weight percent; k is from about 0.1 to about 4 weight percent; l is from 0 to about 0.1 weight percent; and p is greater than or equal to about 7 weight percent and less than or equal to about 20 weight percent.19. The kinetic energy penetrator of claim 18 wherein p is approximately equal to the sum of i, j, k and l.20. The kinetic energy penetrator of claim 18 wherein the composition of which it is comprised exhibits flow-softening characteristics.21. The kinetic energy penetrator of claim 18 wherein the composition of which it is comprised has a microstructure without intermetallic phases.22. The kinetic energy penetrator of claim 18 wherein the composition of which it is comprised has a microstructure with an aluminide phase.23. The kinetic energy penetrator of claim 18 wherein in the composition of which it is comprised amounts of A, B, C and D are adjusted to form a thermomechanically unstable phase.
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이 특허에 인용된 특허 (10)
Mullendore James A. (Towanda PA) Spencer James R. (Sayre PA), Elongated tungsten heavy metal aritcle and method for producing same.
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