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Résultats pour
 brevets
1.
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INTERNAL COMBUSTION ENGINE PISTON AND METHOD FOR MANUFACTURING SAME
| Numéro d'application |
JP2015073143 |
| Numéro de publication |
2016/027808 |
| Statut |
Délivré - en vigueur |
| Date de dépôt |
2015-08-18 |
| Date de publication |
2016-02-25 |
| Propriétaire |
- ART METAL MFG. CO., LTD. (Japon)
- ADVANCED LASER TECHNOLOGY RESEARCH CENTER CO., LTD. (Japon)
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| Inventeur(s) |
- Narusawa, Hiroshi
- Kutsuna, Muneharu
- Watanabe, Tadashi
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Abrégé
[Problem] To provide an internal combustion engine piston having improved strength in a selected portion thereof, and a method for manufacturing the same. [Solution] The present invention solves said problem by an internal combustion engine piston 1 which at least has a portion having a dislocation density within a range of 109-1012 cm/cm3 inclusive and in which precipitates having a longer diameter of 0.2 μm or fine precipitates having a longer diameter less than 0.2 μm are produced by heating the portion having the dislocation density. The portion having the dislocation density exists within a depth range of 1 mm from the surface. The portion having the dislocation density may also be any one portion or at least two portions selected from the outer circumferential surface of the piston, the top surface thereof, the inner surface thereof, and the inner circumferential surface of a pin hole for inserting a piston pin. Also, it is preferable that the portion having the dislocation density be made of an Al-Si based alloy or an Al-Cu based alloy in which fine precipitates are produced by heating.
Classes IPC ?
- F02F 3/00 - Pistons
- B23K 26/00 - Travail par rayon laser, p. ex. soudage, découpage ou perçage
- B23K 26/122 - Travail par rayon laser, p. ex. soudage, découpage ou perçage sous atmosphère particulière, p. ex. dans une enceinte dans un liquide, p. ex. sous l’eau
- B23K 26/356 - Travail par rayon laser, p. ex. soudage, découpage ou perçage pour le traitement de surface par traitement par choc
- F16J 1/01 - PistonsPistons à fourreauPlongeurs caractérisés par l'emploi de matériaux particuliers
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2.
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PISTON AND PROCESS FOR PRODUCING PISTON
| Numéro d'application |
JP2014078040 |
| Numéro de publication |
2015/064434 |
| Statut |
Délivré - en vigueur |
| Date de dépôt |
2014-10-22 |
| Date de publication |
2015-05-07 |
| Propriétaire |
- AISIN SEIKI KABUSHIKI KAISHA (Japon)
- ADVANCED LASER TECHNOLOGY RESEARCH CENTER CO., LTD. (Japon)
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| Inventeur(s) |
- Niimi, Takuya
- Okamoto, Akihiro
- Sugano, Keiki
- Okazaki, Ryo
- Kutsuna, Muneharu
- Saito, Kiyotaka
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Abrégé
This piston is for use in internal combustion engines and comprises: a piston main body constituted of aluminum or an aluminum alloy; and a modification layer that has been formed on the surface of the portions of the piston main body which are to be strengthened, that has a surface constituted of aluminum oxide formed by plasma oxidation, and that has residual compression stress imparted thereto.
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