IPC분류정보
국가/구분 |
United States(US) Patent
공개
|
국제특허분류(IPC7판) |
|
출원번호 |
US-0288788
(2005-11-29)
|
공개번호 |
US-0081315
(2006-04-20)
|
우선권정보 |
JP-2001-284046(2001-09-18); JP-2001-284055(2001-09-18) |
발명자
/ 주소 |
|
출원인 / 주소 |
- Honda Giken Kogyo Kabushiki Kaisha
|
대리인 / 주소 |
|
인용정보 |
피인용 횟수 :
0 인용 특허 :
0 |
초록
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A solution treatment is firstly performed for a non-heat-treated Ni based alloy having a composition equivalent to that of Inconel 718 (registered trademark). Subsequently, a primary aging treatment is applied by holding the Ni based alloy at 610째 to 660째 C. for 5 to 10 hours. After that, a secondar
A solution treatment is firstly performed for a non-heat-treated Ni based alloy having a composition equivalent to that of Inconel 718 (registered trademark). Subsequently, a primary aging treatment is applied by holding the Ni based alloy at 610째 to 660째 C. for 5 to 10 hours. After that, a secondary aging treatment is performed by holding the Ni based alloy at 710째 to 760째 C. for 5 to 10 hours. There are 700 or more precipitates per μm2, in which each precipitate has a longer diameter of not less than 0.5 nm, in a metal microstructure of the Ni based alloy. Some of the precipitates are large precipitates having average diameters of 25 nm to 1 μm. There are 10 or more large precipitates per μm2. A forging die can be produced with the Ni based alloy.
대표청구항
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What is claimed is: 1. A method of producing an Ni based alloy, wherein said Ni based alloy includes not less than 700 precipitates per μm 2 thereof when observed two-dimensionally with a transmission electron microscope having an electron beam transmission thickness normalized to 10 nm, each
What is claimed is: 1. A method of producing an Ni based alloy, wherein said Ni based alloy includes not less than 700 precipitates per μm 2 thereof when observed two-dimensionally with a transmission electron microscope having an electron beam transmission thickness normalized to 10 nm, each of said precipitates having a longer diameter of not less than 0.5 nm, said precipitates including a number of large precipitates having an average diameter of between about 25 nm to 1 μm, said average diameter defined as: (longer diameter+shorter diameter)/2, said method for producing said Ni based alloy comprising: applying a solution treatment to a non-heat-treated Ni based alloy containing 50 to 55 wt % Ni, 17 to 21 wt % Cr, 2.8 to 3.3 wt % Mo, 4.75 to 5.5 wt % Ta and Nb in total provided that Ta is not more than 0.1 wt %, 0.65 to 1.15 wt % Ti, 0.2 to 0.8 wt % Al, and Fe and unavoidable impurity as a residue; performing a primary aging treatment at a fist temperature after said solution treatment; and performing a secondary aging treatment at a second temperature higher than said first temperature. 2. The method according to claim 1, wherein said non-heat-treated Ni based alloy further contains not more than 0.08 wt % Co, not more than 0.01 wt % B, not more than 0.08 wt % Cu, not more than 0.08 wt % C, not more than 0.35 wt % Si, not more than 0.35 wt % Mn, not more than 0.015 wt % P, and not more than 0.015 wt % S. 3. The method according to claim 1, wherein said first temperature is between 610 to 660째 C., and said second temperature is between 710 to 760째 C. 4. The method according to claim 1, wherein said precipitates are primarily γ" phase precipitates. 5. The method according to claim 1, wherein the holding time associated with each of said primary aging treatment and said secondary aging treatment is between 5 to 10 hours. 6. The method according to claim 1, wherein a crystal grain size of base metal in said non-heat-treated Ni based alloy is not less than ASTM No. 8. 7. The method according to claim 1, wherein said Ni based alloy includes between 700 and 1,100 precipitates per μm 2. 8. A method of producing a forging die having improved physical properties, comprising: providing a non-heat-treated Ni based alloy containing 50 to 55 wt % Ni, 17 to 21 wt % Cr, 2.8 to 3.3 wt % Mo, 4.75 to 5.5 wt % Ta and Nb in total provided that Ta is not more than 0.1 wt %, 0.65 to 1.15 wt % Ti, 0.2 to 0.8 wt % Al, and Fe and unavoidable impurity as a residue; forming an unhardened forging die from said non-heat-treated Ni based alloy; applying a solution treatment to said unhardened forging die; subjecting said unhardened forging die to a primary aging treatment at a fist temperature after said solution treatment thereof; and subjecting said unhardened forging die to a secondary aging treatment at a second temperature higher than said first temperature; wherein the resulting alloy of said treated forging die includes not less than 700 precipitates per μm2 thereof when observed two-dimensionally with a transmission electron microscope having an electron beam transmission thickness normalized to 10 nm, each of said precipitates having a longer diameter of not less than 0.5 nm, said precipitates including a number of large precipitates having an average diameter of between about 25 nm to 1 μm, said average diameter defined as: (longer diameter+shorter diameter)/2. 9. The method according to claim 8, wherein said non-heat-treated Ni based alloy further contains not more than 0.08 wt % Co, not more than 0.01 wt % B, not more than 0.08 wt % Cu, not more than 0.08 wt % C, not more than 0.35 wt % Si, not more than 0.35 wt % Mn, not more than 0.015 wt % P, and not more than 0.015 wt % S. 10. The method according to claim 8, wherein said first temperature is between 610 to 660째 C., and said second temperature is between 710 to 760째 C. 11. The method according to claim 8, wherein said precipitates are primarily γ" phase precipitates. 12. The method according to claim 8, wherein the holding time associated with each of said primary aging treatment and said secondary aging treatment is between 5 to 10 hours. 13. The method according to claim 8, wherein a crystal grain size of base metal in said non-heat-treated Ni based alloy is not less than ASTM No. 8. 14. The method according to claim 8, wherein the alloy of said treated forging die includes between 700 and 1,100 precipitates per μm2. 15. A method of producing an Ni based alloy having improved physical properties, comprising: applying a solution treatment to a non-heat-treated Ni based alloy containing 50 to 55 wt % Ni, 17 to 21 wt % Cr, 2.8 to 3.3 wt % Mo, 4.75 to 5.5 wt % Ta and Nb in total provided that Ta is not more than 0.1 wt %, 0.65 to 1.15 wt % Ti, 0.2 to 0.8 wt % Al, and Fe and unavoidable impurity as a residue; after said solution treatment, performing a primary aging treatment at a temperature of between 610 to 660째 C. for between 5 to 10 hours; and after said primary aging treatment, performing a secondary aging treatment at a temperature of between 710 to 760째 C. for between 5 to 10 hours; wherein the resulting Ni based alloy includes not less than 700 precipitates per μm2 thereof when observed two-dimensionally with a transmission electron microscope having an electron beam transmission thickness normalized to 10 nm, each of said precipitates having a longer diameter of not less than 0.5 nm, said precipitates including a number of large precipitates having an average diameter of between about 25 nm to 1 μm, said average diameter defined as: (longer diameter+shorter diameter)/2. 16. The method according to claim 15, wherein said non-heat-treated Ni based alloy further contains not more than 0.08 wt % Co, not more than 0.01 wt % B, not more than 0.08 wt % Cu, not more than 0.08 wt % C, not more than 0.35 wt % Si, not more than 0.35 wt % Mn, not more than 0.015 wt % P, and not more than 0.015 wt % S. 17. The method according to claim 15, wherein said precipitates are primarily γ" phase precipitates. 18. The method according to claim 15, wherein a crystal grain size of base metal in said non-heat-treated Ni based alloy is not less than ASTM No. 8. 19. The method according to claim 15, wherein said improved Ni based alloy includes between 700 and 1,100 precipitates per μm2.
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