JP2010107372A - 腐食疲労損傷の評価方法 - Google Patents
腐食疲労損傷の評価方法 Download PDFInfo
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- 230000007797 corrosion Effects 0.000 title claims abstract description 40
- 238000005260 corrosion Methods 0.000 title claims abstract description 40
- 238000000034 method Methods 0.000 title claims abstract description 16
- 238000012360 testing method Methods 0.000 claims abstract description 78
- 239000000463 material Substances 0.000 claims abstract description 21
- 238000001816 cooling Methods 0.000 claims abstract description 12
- 239000002826 coolant Substances 0.000 claims abstract description 9
- 230000035882 stress Effects 0.000 description 30
- 238000011156 evaluation Methods 0.000 description 20
- 238000005336 cracking Methods 0.000 description 9
- 238000010998 test method Methods 0.000 description 7
- 230000008646 thermal stress Effects 0.000 description 5
- 229910000831 Steel Inorganic materials 0.000 description 4
- 238000010586 diagram Methods 0.000 description 4
- 238000004512 die casting Methods 0.000 description 4
- 238000010438 heat treatment Methods 0.000 description 4
- 239000010959 steel Substances 0.000 description 4
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 4
- 230000003252 repetitive effect Effects 0.000 description 3
- 238000007789 sealing Methods 0.000 description 3
- FAPWRFPIFSIZLT-UHFFFAOYSA-M Sodium chloride Chemical compound [Na+].[Cl-] FAPWRFPIFSIZLT-UHFFFAOYSA-M 0.000 description 2
- 230000001133 acceleration Effects 0.000 description 2
- 238000001514 detection method Methods 0.000 description 2
- 238000009661 fatigue test Methods 0.000 description 2
- 239000008235 industrial water Substances 0.000 description 2
- 238000001878 scanning electron micrograph Methods 0.000 description 2
- 206010037660 Pyrexia Diseases 0.000 description 1
- 239000007864 aqueous solution Substances 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 238000005266 casting Methods 0.000 description 1
- 239000000470 constituent Substances 0.000 description 1
- 239000000498 cooling water Substances 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000003673 groundwater Substances 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 239000003595 mist Substances 0.000 description 1
- 238000010791 quenching Methods 0.000 description 1
- 230000000171 quenching effect Effects 0.000 description 1
- 239000011780 sodium chloride Substances 0.000 description 1
- 229910001220 stainless steel Inorganic materials 0.000 description 1
- 239000010935 stainless steel Substances 0.000 description 1
- 238000007655 standard test method Methods 0.000 description 1
- 239000008399 tap water Substances 0.000 description 1
- 235000020679 tap water Nutrition 0.000 description 1
- 238000005496 tempering Methods 0.000 description 1
Classifications
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N17/00—Investigating resistance of materials to the weather, to corrosion, or to light
- G01N17/04—Corrosion probes
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N3/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N3/32—Investigating strength properties of solid materials by application of mechanical stress by applying repeated or pulsating forces
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N17/00—Investigating resistance of materials to the weather, to corrosion, or to light
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N2203/0058—Kind of property studied
- G01N2203/0069—Fatigue, creep, strain-stress relations or elastic constants
- G01N2203/0073—Fatigue
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N2203/02—Details not specific for a particular testing method
- G01N2203/06—Indicating or recording means; Sensing means
- G01N2203/0617—Electrical or magnetic indicating, recording or sensing means
- G01N2203/0635—Electrical or magnetic indicating, recording or sensing means using magnetic properties
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N2203/02—Details not specific for a particular testing method
- G01N2203/06—Indicating or recording means; Sensing means
- G01N2203/0641—Indicating or recording means; Sensing means using optical, X-ray, ultraviolet, infrared or similar detectors
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- Life Sciences & Earth Sciences (AREA)
- Immunology (AREA)
- Pathology (AREA)
- Chemical & Material Sciences (AREA)
- Analytical Chemistry (AREA)
- Biochemistry (AREA)
- General Health & Medical Sciences (AREA)
- Health & Medical Sciences (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Biodiversity & Conservation Biology (AREA)
- Ecology (AREA)
- Environmental & Geological Engineering (AREA)
- Environmental Sciences (AREA)
- Testing Resistance To Weather, Investigating Materials By Mechanical Methods (AREA)
- Investigating Strength Of Materials By Application Of Mechanical Stress (AREA)
Abstract
【解決手段】 内部に形成した空間に腐食媒体を導入した試験片の表面に、繰り返し荷重を掛け、該荷重を掛けた後の試験片の内部空間の表面および/または断面を観察する腐食疲労損傷の評価方法である。
好ましくは、金型の材質からなる素材片に、該金型の内冷孔を模した空間を形成し、この空間に該金型の冷却媒体を模した腐食媒体を導入した試験片を準備して、この試験片の表面に、繰り返し荷重を掛け、該荷重を掛けた後の試験片の空間の表面および/または断面を観察する腐食疲労損傷の評価方法である。
【選択図】図1
Description
本発明に必要な腐食環境は、従来の「腐食雰囲気中に試験片を設置して形成する(つまり、試験片の表面側に腐食環境を形成する)」ものではなくて、「試験片中に形成した空間に腐食媒体を導入して形成する(つまり、試験片の内部に腐食環境を形成する)」ものである。よって、既存の簡便な疲労試験機を利用して、試験片の表面より繰り返し荷重を掛けることができる。
本発明の場合、実際の疲労部材に対しては、それに熱応力が発生するような場合であっても、該応力は機械的な荷重を付加することで再現できるので、試験片には熱応力の導入は必ずしも必要としない。よって、疲労試験機には、熱応力を発生させるための加熱機構や、それに伴う冷却機構といった特別な設備も不要である。したがって、既存の疲労試験機を利用することで、発生させ得る応力の制御範囲を広範にし、繰り返し荷重のサイクルタイムも短縮できるので、迅速かつ簡便な評価が行える。
本発明の腐食疲労損傷の評価とは、通常の評価項目に加えては、試験片における亀裂の有無や進展状況、破壊の有無、そのときの荷重の大きさや負荷回数を、腐食環境との対比によって行うこと等、応力腐食割れの評価に関するデータの1種以上の採取をいう。そして、その評価のためには、試験片の内部空間の表面および/または断面(例えば、亀裂発生面や破面も含む)の観察が必要である。
つまり、内部に内冷孔を有した実際の金型を、その腐食環境とともに模した試験片を作成する工程である。よって、試験片の材質は、その実際の金型に倣っては、JISに規定される各種工具鋼やその改良鋼に限らず、他の材質であっても当然に適用され得る。そして、腐食媒体についても、その実際の金型に使用される冷却媒体の様態に倣えばよく、試験条件に操作の必要性があれば、種類や濃度等の詳細を変更してもよい。そして、腐食媒体は、水蒸気やミスト、また気体など、液体に限られるものではない。
試験片の表面に荷重を掛ける本発明にとって、その荷重は、好ましくは使用中の金型の内部に生じる繰り返し応力に相当した荷重である。相当した荷重とは、その実際に使用中の金型の内部(つまり内冷孔を含む部位)に発生している応力が、それを模した試験片の空間にも発生し得る表面荷重をいう。そして、この表面荷重の設定値は、実際の金型内部に発生する応力値をそのままに再現できるものである以外には、加速試験等を行うための、操作値であっても勿論よい。
Claims (2)
- 内部に形成した空間に腐食媒体を導入した試験片の表面に、繰り返し荷重を掛け、該荷重を掛けた後の試験片の内部空間の表面および/または断面を観察することを特徴とする腐食疲労損傷の評価方法。
- 金型の材質からなる素材片に、該金型の内冷孔を模した空間を形成し、この空間に該金型の冷却媒体を模した腐食媒体を導入した試験片を準備して、この試験片の表面に、繰り返し荷重を掛け、該荷重を掛けた後の試験片の空間の表面および/または断面を観察することを特徴とする請求項1に記載の腐食疲労損傷の評価方法。
Priority Applications (5)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2008280037A JP5521311B2 (ja) | 2008-10-30 | 2008-10-30 | 金型材の腐食疲労損傷の評価方法 |
EP09823481.8A EP2352007B1 (en) | 2008-10-30 | 2009-10-16 | Method for evaluating corrosion fatigue damage |
KR1020117006314A KR101280343B1 (ko) | 2008-10-30 | 2009-10-16 | 부식 피로 손상의 평가 방법 |
CN200980142723.2A CN102197297B (zh) | 2008-10-30 | 2009-10-16 | 腐蚀疲劳损伤的评价方法 |
PCT/JP2009/067893 WO2010050368A1 (ja) | 2008-10-30 | 2009-10-16 | 腐食疲労損傷の評価方法 |
Applications Claiming Priority (1)
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---|---|---|---|
JP2008280037A JP5521311B2 (ja) | 2008-10-30 | 2008-10-30 | 金型材の腐食疲労損傷の評価方法 |
Related Child Applications (1)
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JP2013256757A Division JP5776990B2 (ja) | 2013-12-12 | 2013-12-12 | 腐食疲労損傷の評価方法 |
Publications (2)
Publication Number | Publication Date |
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JP2010107372A true JP2010107372A (ja) | 2010-05-13 |
JP5521311B2 JP5521311B2 (ja) | 2014-06-11 |
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JP2008280037A Active JP5521311B2 (ja) | 2008-10-30 | 2008-10-30 | 金型材の腐食疲労損傷の評価方法 |
Country Status (5)
Country | Link |
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EP (1) | EP2352007B1 (ja) |
JP (1) | JP5521311B2 (ja) |
KR (1) | KR101280343B1 (ja) |
CN (1) | CN102197297B (ja) |
WO (1) | WO2010050368A1 (ja) |
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
KR101144062B1 (ko) | 2009-11-06 | 2012-05-23 | 한국표준과학연구원 | 침식성 가스 손상가속화 충격 시험편 |
US9128018B2 (en) | 2013-03-19 | 2015-09-08 | Hitachi Metals, Ltd. | Method for evaluating corrosion-fatigue life of steel material |
JP2015163840A (ja) * | 2013-03-19 | 2015-09-10 | 日立金属株式会社 | 鋼材の腐食疲労寿命の評価方法 |
JP2017067653A (ja) * | 2015-09-30 | 2017-04-06 | 新日鐵住金株式会社 | 試験片 |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP2679978B1 (en) * | 2012-06-26 | 2020-01-08 | GE Oil & Gas UK Limited | Sample testing apparatus and method |
Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS4875086A (ja) * | 1972-01-08 | 1973-10-09 | ||
JPS6388739U (ja) * | 1986-11-28 | 1988-06-09 | ||
SU1576857A1 (ru) * | 1988-04-08 | 1990-07-07 | Киевский Политехнический Институт Им.50-Летия Великой Октябрьской Социалистической Революции | Образец дл испытани материалов в коррозионных средах |
JPH03210452A (ja) * | 1990-01-16 | 1991-09-13 | Nippon Steel Corp | 実管回転曲げ腐食疲労試験方法 |
Family Cites Families (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS6214035A (ja) * | 1985-07-12 | 1987-01-22 | Mitsubishi Heavy Ind Ltd | 疲労亀裂伝播試験用試験片 |
CN100494972C (zh) * | 2004-10-29 | 2009-06-03 | 宝山钢铁股份有限公司 | 油井管应力腐蚀开裂临界应力强度与敏感因子的评测方法 |
JP2007298467A (ja) | 2006-05-02 | 2007-11-15 | Daido Steel Co Ltd | 評価試験方法およびその装置 |
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2008
- 2008-10-30 JP JP2008280037A patent/JP5521311B2/ja active Active
-
2009
- 2009-10-16 CN CN200980142723.2A patent/CN102197297B/zh active Active
- 2009-10-16 EP EP09823481.8A patent/EP2352007B1/en active Active
- 2009-10-16 KR KR1020117006314A patent/KR101280343B1/ko active IP Right Grant
- 2009-10-16 WO PCT/JP2009/067893 patent/WO2010050368A1/ja active Application Filing
Patent Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS4875086A (ja) * | 1972-01-08 | 1973-10-09 | ||
JPS6388739U (ja) * | 1986-11-28 | 1988-06-09 | ||
SU1576857A1 (ru) * | 1988-04-08 | 1990-07-07 | Киевский Политехнический Институт Им.50-Летия Великой Октябрьской Социалистической Революции | Образец дл испытани материалов в коррозионных средах |
JPH03210452A (ja) * | 1990-01-16 | 1991-09-13 | Nippon Steel Corp | 実管回転曲げ腐食疲労試験方法 |
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
KR101144062B1 (ko) | 2009-11-06 | 2012-05-23 | 한국표준과학연구원 | 침식성 가스 손상가속화 충격 시험편 |
US9128018B2 (en) | 2013-03-19 | 2015-09-08 | Hitachi Metals, Ltd. | Method for evaluating corrosion-fatigue life of steel material |
JP2015163840A (ja) * | 2013-03-19 | 2015-09-10 | 日立金属株式会社 | 鋼材の腐食疲労寿命の評価方法 |
JP2017067653A (ja) * | 2015-09-30 | 2017-04-06 | 新日鐵住金株式会社 | 試験片 |
Also Published As
Publication number | Publication date |
---|---|
EP2352007A1 (en) | 2011-08-03 |
KR101280343B1 (ko) | 2013-07-01 |
CN102197297A (zh) | 2011-09-21 |
EP2352007B1 (en) | 2014-05-07 |
WO2010050368A1 (ja) | 2010-05-06 |
KR20110055672A (ko) | 2011-05-25 |
JP5521311B2 (ja) | 2014-06-11 |
EP2352007A4 (en) | 2012-04-25 |
CN102197297B (zh) | 2014-11-05 |
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