JP2004232074A5 - - Google Patents
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- JP2004232074A5 JP2004232074A5 JP2003034583A JP2003034583A JP2004232074A5 JP 2004232074 A5 JP2004232074 A5 JP 2004232074A5 JP 2003034583 A JP2003034583 A JP 2003034583A JP 2003034583 A JP2003034583 A JP 2003034583A JP 2004232074 A5 JP2004232074 A5 JP 2004232074A5
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- JP
- Japan
- Prior art keywords
- dew point
- surface layer
- annealing
- atmosphere
- contact resistance
- 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.)
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Description
光輝焼鈍：露点−３０℃以下の雰囲気で加熱
焼鈍雰囲気の露点が高くなると、比抵抗の高いＳｉ，Ｍｎの酸化物が多くなり不動態皮膜の表面接触抵抗が増加する。Ｃｕ／(Ｓｉ＋Ｍｎ)≧０.５で表層にＣｕを濃化させる上では、後述の実施例からも明らかなように露点−３０℃以下の焼鈍雰囲気で、好ましくは８５０〜１１００℃にステンレス鋼板を焼鈍する。光輝焼鈍により、マトリックスにＣｕリッチ相が均一に分散析出し、或いは表層にＣｕが濃化して表面接触抵抗の低い表層に改質される。
Bright annealing: heating in an atmosphere having a dew point of −30 ° C. or lower When the dew point in the annealing atmosphere increases, the oxides of Si and Mn having high specific resistance increase, and the surface contact resistance of the passive film increases. In enriching Cu in the surface layer with Cu / (Si + Mn) ≧ 0.5, a stainless steel sheet is preferably heated to 850 to 1100 ° C. in an annealing atmosphere having a dew point of −30 ° C. or less, as is clear from the examples described later. Anneal. By bright annealing, a Cu-rich phase is uniformly dispersed and precipitated in the matrix, or Cu is concentrated in the surface layer to be reformed into a surface layer having low surface contact resistance.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2003034583A JP4340448B2 (en) | 2002-03-28 | 2003-02-13 | Ferritic stainless steel for fuel cell separator and method for producing the same |
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2002092995 | 2002-03-28 | ||
| JP2002354690 | 2002-12-06 | ||
| JP2003034583A JP4340448B2 (en) | 2002-03-28 | 2003-02-13 | Ferritic stainless steel for fuel cell separator and method for producing the same |
Publications (3)
| Publication Number | Publication Date |
|---|---|
| JP2004232074A JP2004232074A (en) | 2004-08-19 |
| JP2004232074A5 true JP2004232074A5 (en) | 2006-03-30 |
| JP4340448B2 JP4340448B2 (en) | 2009-10-07 |
Family
ID=32966222
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2003034583A Expired - Lifetime JP4340448B2 (en) | 2002-03-28 | 2003-02-13 | Ferritic stainless steel for fuel cell separator and method for producing the same |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP4340448B2 (en) |
Families Citing this family (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2006302729A (en) * | 2005-04-22 | 2006-11-02 | Nisshin Steel Co Ltd | Stainless steel separator for polymer electrolyte fuel cell and polymer electrolyte fuel cell |
| WO2006137584A1 (en) | 2005-06-22 | 2006-12-28 | Nippon Steel Corporation | Separator for solid polymer electrolyte fuel cell of stainless steel, titanium or titanium alloy, process for producing the same, and method for evaluating warping and twisting of separator |
| JP5014644B2 (en) | 2006-02-27 | 2012-08-29 | 新日本製鐵株式会社 | Separator for polymer electrolyte fuel cell and method for producing the same |
| US8529709B2 (en) | 2007-03-06 | 2013-09-10 | Ati Properties, Inc. | Method for reducing formation of electrically resistive layer on ferritic stainless steels |
| KR100993412B1 (en) | 2008-12-29 | 2010-11-09 | 주식회사 포스코 | Stainless steel for polymer electrolyte membrane fuel cell and fabrication method for the same |
| CN102473935B (en) | 2009-08-03 | 2014-12-03 | 新日铁住金株式会社 | Titanium material for solid polymer fuel cell separator, and process for production thereof |
| JP6037882B2 (en) * | 2012-02-15 | 2016-12-07 | 新日鐵住金ステンレス株式会社 | Ferritic stainless steel sheet with excellent scale peel resistance and method for producing the same |
| JP6071608B2 (en) | 2012-03-09 | 2017-02-01 | 新日鐵住金ステンレス株式会社 | Ferritic stainless steel plate with excellent oxidation resistance |
| CA2907970C (en) | 2013-03-27 | 2021-05-25 | Nippon Steel & Sumikin Stainless Steel Corporation | Hot-rolled ferritic stainless-steel plate, process for producing same, and steel strip |
| JP2014198868A (en) * | 2013-03-29 | 2014-10-23 | 日立金属株式会社 | Method of manufacturing stainless steel for solid oxide fuel cell |
| JP6489770B2 (en) * | 2013-09-26 | 2019-03-27 | 日新製鋼株式会社 | Stainless steel sheet having a small amount of elution in non-aqueous electrolyte environment, method for producing the same, and exterior member of non-aqueous electrolyte secondary battery |
| JP7092280B2 (en) * | 2017-04-28 | 2022-06-28 | 株式会社Flosfia | Conductive member and its manufacturing method |
| KR20220092979A (en) * | 2020-04-15 | 2022-07-04 | 닛테츠 스테인레스 가부시키가이샤 | Ferritic stainless steel and its manufacturing method |
-
2003
- 2003-02-13 JP JP2003034583A patent/JP4340448B2/en not_active Expired - Lifetime
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