JPH11200946A5 - - Google Patents
Info
- Publication number
- JPH11200946A5 JPH11200946A5 JP1998004470A JP447098A JPH11200946A5 JP H11200946 A5 JPH11200946 A5 JP H11200946A5 JP 1998004470 A JP1998004470 A JP 1998004470A JP 447098 A JP447098 A JP 447098A JP H11200946 A5 JPH11200946 A5 JP H11200946A5
- Authority
- JP
- Japan
- Prior art keywords
- hardened
- thickness
- relationship
- stress amplitude
- overlay
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
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Description
【００１１】
【課題を解決するための手段】
上記課題を解決する本発明の肉盛強化ピストンは、上面に高温耐食合金が多層に肉盛され、前記肉盛の厚さの上限が、肉盛材の特性である応力振幅と肉盛厚さとの関係と、応力振幅と繰り返し数との関係とに基づいて、エンジンの起動・停止の想定回数から、決定されていることを特徴とする。[0011]
[Means for solving the problem]
The hardened piston of the present invention, which solves the above-mentioned problems, is characterized in that a high-temperature corrosion-resistant alloy is hardened on the upper surface in multiple layers , and the upper limit of the hardened thickness is determined from the expected number of engine starts and stops, based on the relationship between stress amplitude and hardened thickness, which are characteristics of the hardened material, and the relationship between stress amplitude and number of cycles .
【００１２】
また、本発明の肉盛強化ピストンは、上面に高温耐食合金が多層に肉盛され、
前記高温耐食合金がニッケル５８重量％以上、クロム２０〜２３重量％、モリブデン８〜１０重量％を含む高ニッケル基合金鋼であり、
前記肉盛の厚さの上限が、肉盛材の特性である応力振幅と肉盛厚さとの関係と、応力振幅と繰り返し数との関係とに基づいて、エンジンの起動・停止の想定回数から、決定されていることを特徴とする。[0012]
In addition, the hardened piston of the present invention has a multi-layered hardened high-temperature corrosion-resistant alloy on the upper surface,
The high-temperature corrosion-resistant alloy is a high-nickel-based alloy steel containing 58% by weight or more of nickel, 20 to 23% by weight of chromium, and 8 to 10% by weight of molybdenum,
The upper limit of the thickness of the buildup is determined from the expected number of engine starts and stops, based on the relationship between stress amplitude and buildup thickness, which are characteristics of the buildup material, and the relationship between stress amplitude and number of repetitions .
【００２８】
【発明の効果】
以上、発明の実施の形態と共に具体的に説明したように、本発明の肉盛強化ピストンは、上面に高温耐食合金が多層に肉盛され、前記肉盛の厚さの上限が、肉盛材の特性である応力振幅と肉盛厚さとの関係と、応力振幅と繰り返し数との関係とに基づいて、エンジンの起動・停止の想定回数から、決定されていることを特徴とする。[0028]
[Effects of the Invention]
As specifically described above in conjunction with the embodiments of the invention, the hardened piston of the present invention is characterized in that a high-temperature corrosion-resistant alloy is hardened on the upper surface in multiple layers , and the upper limit of the hardened thickness is determined from the expected number of engine starts and stops, based on the relationship between stress amplitude and hardened thickness, which are characteristics of the hardened material, and the relationship between stress amplitude and the number of repetitions .
【００２９】
従って、この肉盛強化ピストンによれば、高温耐食合金（肉盛材）を多層に肉盛したことにより、高温耐食合金中の耐食性向上に効く成分がピストン母材の方へ拡散（希釈）するのを低減して、高温耐食合金の成分を確保することができる。このため、ピストン触火面（肉盛の表面）は、期待どおり耐食性が得られる。
また、この肉盛強化ピストンによれば、高ニッケル基合金鋼等の肉盛材を多層に肉盛する場合の肉盛り厚さの上限を合理的に決定することにより、エンジンの起動・停止に伴う温度変化サイクルによる熱疲労き裂が生じにくくなる。 [0029]
Therefore, with this hardened piston, the high-temperature corrosion-resistant alloy (hardened material) is hardened in multiple layers, which reduces the diffusion (dilution) of the components in the high-temperature corrosion-resistant alloy that are effective in improving corrosion resistance into the piston base material, thereby ensuring the components of the high-temperature corrosion-resistant alloy. As a result, the piston contact surface (hardened surface) can achieve the expected corrosion resistance.
Furthermore, with this hardened piston, by rationally determining the upper limit of the thickness of the hardened build-up when the build-up material such as high-nickel alloy steel is applied in multiple layers, thermal fatigue cracks caused by the temperature change cycles that accompany starting and stopping of the engine are less likely to occur.
【００３０】
また、本発明の肉盛強化ピストンは、上面に高温耐食合金が多層に肉盛され、前記高温耐食合金がニッケル５８重量％以上、クロム２０〜２３重量％、モリブデン８〜１０重量％を含む高ニッケル基合金鋼であり、前記肉盛の厚さの上限が、肉盛材の特性である応力振幅と肉盛厚さとの関係と、応力振幅と繰り返し数との関係とに基づいて、エンジンの起動・停止の想定回数から、決定されていることを特徴とする。[0030]
Furthermore, the hardened piston of the present invention has a multi-layered build-up of a high-temperature corrosion-resistant alloy on its upper surface, the high-temperature corrosion-resistant alloy being a high-nickel alloy steel containing 58% by weight or more of nickel, 20 to 23% by weight of chromium, and 8 to 10% by weight of molybdenum, and the upper limit of the build-up thickness is determined from the expected number of engine starts and stops, based on the relationship between stress amplitude and build-up thickness, which are characteristics of the build-up material, and the relationship between stress amplitude and the number of repetitions .
【００３１】
従って、この肉盛強化ピストンによれば、高ニッケル基合金鋼（肉盛材）を多層に肉盛したことにより、高ニッケル基合金鋼中の耐食性向上に効く成分（クロム及びモリブデン）がピストン母材の方へ拡散（希釈）するのを低減して、高ニッケル基合金鋼の成分を確保することができる。このため、ピストン触火面（肉盛の表面）は、期待どおり耐食性が得られる。
また、この肉盛強化ピストンによれば、高ニッケル基合金鋼等の肉盛材を多層に肉盛する場合の肉盛り厚さの上限を合理的に決定することにより、エンジンの起動・停止に伴う温度変化サイクルによる熱疲労き裂が生じにくくなる。 [0031]
Therefore, with this hardened piston, the high-nickel alloy steel (hardening material) is hardened in multiple layers, which reduces the diffusion (dilution) of the elements (chromium and molybdenum) in the high-nickel alloy steel that are effective in improving corrosion resistance into the piston base material, thereby ensuring the elements of the high-nickel alloy steel. As a result, the piston contact surface (the surface of the hardening) can achieve the expected corrosion resistance.
Furthermore, with this hardened piston, by rationally determining the upper limit of the thickness of the hardened build-up when the build-up material such as high-nickel alloy steel is applied in multiple layers, thermal fatigue cracks caused by the temperature change cycles that accompany starting and stopping of the engine are less likely to occur.
Claims (2)
前記肉盛の厚さの上限が、肉盛材の特性である応力振幅と肉盛厚さとの関係と、応力振幅と繰り返し数との関係とに基づいて、エンジンの起動・停止の想定回数から、決定されていることを特徴とする肉盛強化ピストン。High-temperature corrosion-resistant alloy is built up in multiple layers on the top surface ,
A hardened piston characterized in that the upper limit of the thickness of the overlay is determined from the expected number of engine starts and stops, based on the relationship between stress amplitude and overlay thickness, which are characteristics of the overlay material, and the relationship between stress amplitude and number of repetitions .
前記高温耐食合金がニッケル５８重量％以上、クロム２０〜２３重量％、モリブデン８〜１０重量％を含む高ニッケル基合金鋼であり、
前記肉盛の厚さの上限が、肉盛材の特性である応力振幅と肉盛厚さとの関係と、応力振幅と繰り返し数との関係とに基づいて、エンジンの起動・停止の想定回数から、決定されていることを特徴とする肉盛強化ピストン。 High-temperature corrosion-resistant alloy is built up in multiple layers on the top surface,
The high-temperature corrosion-resistant alloy is a high-nickel-based alloy steel containing 58% by weight or more of nickel, 20 to 23% by weight of chromium, and 8 to 10% by weight of molybdenum,
A hardened piston characterized in that the upper limit of the thickness of the overlay is determined from the expected number of engine starts and stops, based on the relationship between stress amplitude and overlay thickness, which are characteristics of the overlay material, and the relationship between stress amplitude and number of repetitions .
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP00447098A JP3835916B2 (en) | 1998-01-13 | 1998-01-13 | Manufacturing method of overlay reinforcement piston |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP00447098A JP3835916B2 (en) | 1998-01-13 | 1998-01-13 | Manufacturing method of overlay reinforcement piston |
Publications (3)
| Publication Number | Publication Date |
|---|---|
| JPH11200946A JPH11200946A (en) | 1999-07-27 |
| JPH11200946A5 true JPH11200946A5 (en) | 2004-12-09 |
| JP3835916B2 JP3835916B2 (en) | 2006-10-18 |
Family
ID=11585022
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP00447098A Expired - Lifetime JP3835916B2 (en) | 1998-01-13 | 1998-01-13 | Manufacturing method of overlay reinforcement piston |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3835916B2 (en) |
Families Citing this family (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE10063568A1 (en) * | 2000-12-20 | 2002-07-04 | Mahle Gmbh | Cooling channel piston for a diesel engine with direct injection with a piston diameter of 100 mm |
| CN101970811B (en) * | 2009-01-23 | 2013-06-12 | 曼柴油机涡轮机欧洲股份公司曼柴油机涡轮机德国分公司 | Movable wall component in the form of an exhaust valve stem or piston for an internal combustion engine and method for producing such a component |
| CN102472199B (en) | 2010-04-30 | 2014-04-23 | 丰田自动车株式会社 | Piston for engine |
| KR102163845B1 (en) * | 2014-02-28 | 2020-10-12 | 미츠비시 쥬고교 가부시키가이샤 | Mobile wall member and welding method |
| US9765727B2 (en) | 2014-03-03 | 2017-09-19 | Federal-Mogul Llc | One-piece piston featuring additive machining produced combustion bowl rim and cooling gallery |
| US11650173B2 (en) * | 2019-11-01 | 2023-05-16 | Caterpillar Inc. | Grading a piston with deposits using thermal scan data |
| CN116490317A (en) * | 2020-11-20 | 2023-07-25 | 康明斯有限公司 | Piston including superalloy based weld overlay |
-
1998
- 1998-01-13 JP JP00447098A patent/JP3835916B2/en not_active Expired - Lifetime
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