JP2002275651A - Lubricating film treatment method for stainless steel - Google Patents
Lubricating film treatment method for stainless steelInfo
- Publication number
- JP2002275651A JP2002275651A JP2001075574A JP2001075574A JP2002275651A JP 2002275651 A JP2002275651 A JP 2002275651A JP 2001075574 A JP2001075574 A JP 2001075574A JP 2001075574 A JP2001075574 A JP 2001075574A JP 2002275651 A JP2002275651 A JP 2002275651A
- Authority
- JP
- Japan
- Prior art keywords
- stainless steel
- steel material
- film
- films
- zinc phosphate
- 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.)
- Pending
Links
Landscapes
- Cleaning And De-Greasing Of Metallic Materials By Chemical Methods (AREA)
- Forging (AREA)
- Chemical Treatment Of Metals (AREA)
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明はステンレス鋼材の表
面に冷間加工（冷間鍛造）用の潤滑皮膜を形成する方法
に関する。The present invention relates to a method for forming a lubricating film for cold working (cold forging) on the surface of a stainless steel material.
【０００２】[0002]
【従来の技術】従来から鋼材の表面の腐食を防ぐために
燐酸塩皮膜を形成することが行われてきた。また、最近
では作業環境の向上、コスト削減などの要請により、熱
間鍛造に代わって冷間鍛造が重要視されている。鋼材を
冷間鍛造するには鋼材の表面に燐酸塩皮膜を形成するだ
けでは不充分であり、潤滑層を形成する必要があり、例
えば、燐酸塩皮膜とソーダ石鹸とを反応させて潤滑性に
富む金属石鹸層を形成することが一般的に行われてい
る。2. Description of the Related Art Conventionally, a phosphate film has been formed to prevent corrosion of the surface of a steel material. In recent years, cold forging has been emphasized in place of hot forging due to demands for improvement of work environment, cost reduction, and the like. To cold forge steel, it is not enough to form a phosphate film on the surface of the steel, and it is necessary to form a lubricating layer.For example, the phosphate film reacts with soda soap to improve lubricity. It is common practice to form a rich metal soap layer.
【０００３】しかしながら、ステンレス鋼材を冷間鍛造
しようとした場合、ステンレス鋼材にはＣrやＮiが含ま
れているので燐酸塩皮膜を付着させることが困難で、燐
酸塩皮膜とソーダ石鹸との反応によって金属石鹸層を形
成することができない。[0003] However, when cold forging a stainless steel material, it is difficult to deposit a phosphate film because the stainless steel material contains Cr and Ni, and the reaction between the phosphate film and the soda soap is difficult. Metal soap layer cannot be formed.
【０００４】上記の問題を解消するため、特開昭５７−
１７７９３２号公報には、ステンレス鋼材にショットブ
ラストを施し、次いで酸洗した後に燐酸塩皮膜の形成
（下地処理）を行い、潤滑処理を行うことが開示されて
いる。また、特開昭６３−１９２５２７号公報には、上
記特開昭５７−１７７９３２号公報のショットブラスト
を鉄・亜鉛粒を用いて行うことでステンレス鋼材の表面
に鉄・亜鉛合金層を形成し、この鉄・亜鉛合金層の上に
燐酸塩皮膜を形成する手段が開示されている。更に、特
公平１−２８１１１号公報には、ステンレス鋼材をシュ
ウ酸と接触させ、燐酸塩皮膜の代わりにＦe2Ｃ2Ｏ4・２
Ｈ2Ｏを主成分とするシュウ酸塩皮膜をつけることが開
示されている。To solve the above problem, Japanese Patent Laid-Open No.
Japanese Patent No. 177932 discloses that a stainless steel material is subjected to shot blasting, followed by pickling, followed by formation of a phosphate film (base treatment) and lubrication treatment. Also, in JP-A-63-192527, an iron-zinc alloy layer is formed on the surface of a stainless steel material by performing shot blasting of the above-mentioned JP-A-57-177932 using iron / zinc particles. Means for forming a phosphate film on the iron / zinc alloy layer is disclosed. Furthermore, Japanese Patent Publication No. 28111/1989 discloses that a stainless steel material is brought into contact with oxalic acid and Fe 2 C 2 O 4.
It is disclosed to apply an oxalate film containing H 2 O as a main component.
【０００５】[0005]
【発明が解決しようとする課題】特開昭５７−１７７９
３２号公報や特開昭６３−１９２５２７号公報に開示さ
れるように、ショットブラストによってステンレス鋼材
の表面を粗面にする方法は、冷間鍛造後の製品表面に粗
面が残ることが考えられ、好ましくない。Problems to be Solved by the Invention
As disclosed in Japanese Patent Publication No. 32 and JP-A-63-192527, the method of making the surface of a stainless steel material rough by shot blasting is considered to leave a rough surface on the product surface after cold forging. Is not preferred.
【０００６】また、特公平１−２８１１１号公報に開示
されるシュウ酸塩皮膜を形成した場合、耐熱性に問題が
あり、約１２０℃で皮膜の付着性が低下してしまう。Further, when an oxalate film disclosed in Japanese Patent Publication No. 28111/1989 is formed, there is a problem in heat resistance, and the adhesion of the film is reduced at about 120 ° C.
【０００７】[0007]
【課題を解決するための手段】上記課題を解決するため
本発明に係るステンレス鋼の潤滑皮膜処理方法は、以下
の第１工程から第６工程を含む構成とした。 第１工程：ステンレス鋼材の表面に付着する油脂分を取
り除く脱脂工程 第２工程：ステンレス鋼材の表面の酸化スケール及び錆
びを取り除く酸洗工程 第３工程：ステンレス鋼材の表面にシュウ酸塩皮膜を形
成する工程 第４工程：ステンレス鋼材の表面に形成した前記シュウ
酸塩皮膜を除去する酸洗工程 第５工程：ステンレス鋼材の表面に燐酸亜鉛皮膜を形成
する工程 第６工程：前記燐酸亜鉛皮膜の上に潤滑層を形成する工
程Means for Solving the Problems In order to solve the above problems, a method for treating a lubricating film on stainless steel according to the present invention comprises the following first to sixth steps. First step: Degreasing step for removing oils and fats adhering to the surface of stainless steel material Second step: Pickling step for removing oxidation scale and rust on the surface of stainless steel material Third step: Forming oxalate film on the surface of stainless steel material Step 4: Step of pickling to remove the oxalate film formed on the surface of the stainless steel material Step 5: Step of forming a zinc phosphate film on the surface of the stainless steel material Step 6: On the zinc phosphate film Of forming a lubrication layer on the surface
【０００８】本発明の特徴は、第２工程と第５工程の間
に、シュウ酸塩皮膜を形成し、再びこのシュウ酸塩皮膜
を除去する工程を入れた点にあり、この工程を入れるこ
とで金属表面が露出して表面を活性化することができ、
後工程でステンレス鋼材の表面に形成する燐酸亜鉛皮膜
の付着力を高めることができる。A feature of the present invention resides in that a step of forming an oxalate film and removing the oxalate film again is inserted between the second step and the fifth step. Can expose the metal surface and activate the surface,
The adhesion of the zinc phosphate film formed on the surface of the stainless steel material in a later step can be increased.
【０００９】本発明は上記の第１〜第６の工程を含むも
のであり、各工程間に必要に応じて、水洗、湯洗、中和
処理或いは乾燥工程を介在せしめる。また、第６工程の
潤滑層を形成する工程としては、ステアリン酸ソーダを
燐酸亜鉛皮膜と反応させて金属石鹸層を形成するのが一
般的であるが、これに限定されるものではない。The present invention includes the above-described first to sixth steps, and a water washing, a hot water washing, a neutralization treatment or a drying step is interposed between the respective steps as necessary. In the sixth step of forming a lubricating layer, it is common to react sodium stearate with a zinc phosphate film to form a metal soap layer, but the present invention is not limited to this.
【００１０】[0010]
【発明の実施の形態】以下に本発明の実施の形態を添付
図面に基づいて説明する。図１は本発明に係るステンレ
ス鋼の潤滑皮膜処理方法を工程順に説明したブロック
図、図２は本発明方法によって潤滑皮膜が形成されたス
テンレス鋼材の断面図である。Embodiments of the present invention will be described below with reference to the accompanying drawings. FIG. 1 is a block diagram illustrating a method of treating a lubricating film on stainless steel according to the present invention in the order of steps, and FIG. 2 is a cross-sectional view of a stainless steel material having a lubricating film formed by the method of the present invention.
【００１１】先ず第１工程では、脱脂剤を用いて、ステ
ンレス鋼材の表面に付着している油脂分、汚れ等を湿潤
・分散・乳化作用によって取り除く。脱脂剤としては、
パルクリーン３５７（日本パーカライジング社製）また
はＣ−７８（ＣＢケミカル社製）を用い、管理範囲は遊
離アルカリ度１０〜５０ポイント、油脂分０.３ポイン
ト以下、浸漬時間４分、処理温度８０℃とする。この
後、水洗してステンレス鋼材の表面に残っている脱脂剤
や油脂分、汚れを洗い流す。水洗の条件としては、例え
ば室温で３分間行う。First, in the first step, a fat and oil, dirt and the like adhering to the surface of the stainless steel material are removed by a wetting, dispersing and emulsifying action using a degreasing agent. As a degreasing agent,
Using Palclean 357 (manufactured by Nippon Parkerizing Co., Ltd.) or C-78 (manufactured by CB Chemical Co., Ltd.), the control range is a free alkalinity of 10 to 50 points, a fat and oil content of 0.3 point or less, a dipping time of 4 minutes, and a treatment temperature of 80 ° C. And After that, the surface of the stainless steel material is washed with water to remove the degreasing agent, oil and fat, and dirt. The condition of the water washing is, for example, at room temperature for 3 minutes.
【００１２】次いで、第２工程である酸洗を行って、表
面に付着する酸化スケール及び錆を取り除く。使用する
酸としては硫酸（１３％）または塩酸（１５％）とし、
管理範囲は遊離酸度１０〜２５ポイント、鉄分−１００
ｇ／ｌ、浸漬時間５分、処理温度は室温とする。この酸
洗の後は、水洗（例えば室温で３分間）を行って、表面
に残っている酸を洗い流す。Next, pickling, which is the second step, is performed to remove oxide scale and rust adhering to the surface. The acid used is sulfuric acid (13%) or hydrochloric acid (15%),
The control range is 10-25 points of free acidity, iron -100
g / l, immersion time 5 minutes, and treatment temperature at room temperature. After this pickling, washing with water (for example, at room temperature for 3 minutes) is performed to wash away the acid remaining on the surface.
【００１３】次いで、第３工程ではシュウ酸に浸漬し、
ステンレス鋼材の表面にシュウ酸塩皮膜を形成する。反
応式は以下の通りである。 Ｆe+Ｈ2Ｃ2Ｏ4→ＦeＣ2Ｏ4 また第３工程の管理範囲は、８０℃、５分、全酸度９〜
１２ポイントとする。シュウ酸塩皮膜を形成した後は、
水洗（例えば室温で３分間）を行って、表面に残ってい
るシュウ酸などを洗い流す。Next, in a third step, the substrate is immersed in oxalic acid,
An oxalate film is formed on the surface of stainless steel. The reaction formula is as follows. Fe + H 2 C 2 O 4 → FeC 2 O 4 The control range of the third step is 80 ° C., 5 minutes, total acidity 9 to
12 points. After forming the oxalate film,
Rinse with water (for example, at room temperature for 3 minutes) to wash away oxalic acid and the like remaining on the surface.
【００１４】次いで、第４工程において、シュウ酸塩皮
膜を形成したステンレス鋼材の表面を酸洗し、シュウ酸
塩皮膜を除去して金属表面を露出させる。酸洗の条件は
第２工程の酸洗の条件と同様とする。この酸洗によりス
テンレス鋼材の表面は活性化する。因みに、第２工程の
酸洗では燐酸塩皮膜が十分な付着力で形成されるほどに
ステンレス鋼材の表面は活性化しない。尚、第４工程の
後にも水洗（例えば室温で３分間）を行って、表面に残
っている汚れを洗い流す。Next, in a fourth step, the surface of the stainless steel material on which the oxalate film is formed is pickled, and the oxalate film is removed to expose the metal surface. The conditions for pickling are the same as the conditions for pickling in the second step. This pickling activates the surface of the stainless steel material. Incidentally, in the pickling in the second step, the surface of the stainless steel material is not activated to the extent that a phosphate film is formed with a sufficient adhesive force. Note that, after the fourth step, washing with water (for example, at room temperature for 3 minutes) is performed to wash away dirt remaining on the surface.
【００１５】この後、第５工程のリン酸亜鉛皮膜処理を
行って、ステンレス鋼材の表面に燐酸塩皮膜を形成す
る。反応式は以下の通りである。 ３Ｚn(Ｈ2ＰＯ4)＋２Ｆe→Ｚn3(ＰＯ4) 2＋２Ｆe(Ｈ2Ｐ
Ｏ4) 2＋Ｈ2 第４工程の酸洗から第５工程のリン酸亜鉛皮膜処理まで
の時間は、ステンレス鋼材の表面の活性が消失しないう
ちに行うため、出来るだけ短くすることが好ましい。Thereafter, a zinc phosphate film treatment in a fifth step is performed to form a phosphate film on the surface of the stainless steel material. The reaction formula is as follows. 3Zn (H 2 PO 4 ) + 2Fe → Zn 3 (PO 4 ) 2 + 2Fe (H 2 P
O 4 ) 2 + H 2 The time from the pickling in the fourth step to the zinc phosphate coating treatment in the fifth step is preferably set as short as possible because it is performed before the activity of the surface of the stainless steel material is lost.
【００１６】第５工程の後にも水洗（例えば室温で３分
間）を行い、更に中和する。中和剤には、プレバレン２
１（日本パーカライジング社製）またはフィナーレン８
２２（ＣＢケミカル社製）を用いる。After the fifth step, water washing (for example, at room temperature for 3 minutes) is performed to further neutralize. Prevalene 2 as a neutralizing agent
1 (manufactured by Nippon Parkerizing Co., Ltd.) or finale 8
22 (manufactured by CB Chemical Co., Ltd.).
【００１７】そして、中和が完了したならば、第６工程
において燐酸亜鉛皮膜の上に潤滑層を形成する。本実施
例にあっては、ステアリン酸ソーダを燐酸亜鉛皮膜と反
応させて金属石鹸層を形成する。反応式は以下の通りで
ある。 Ｚn3(ＰＯ4) 2＋６Ｃ17Ｈ35ＣＯＯＮa→３Ｚn(Ｃ17Ｈ35
ＣＯＯ) 2＋２Ｎa3ＰＯ4 When the neutralization is completed, a lubricating layer is formed on the zinc phosphate film in a sixth step. In this embodiment, a metal soap layer is formed by reacting sodium stearate with a zinc phosphate film. The reaction formula is as follows. Zn 3 (PO 4 ) 2 + 6C 17 H 35 COONa → 3Zn (C 17 H 35
(COO) 2 + 2Na 3 PO 4
【００１８】この後、乾燥させることで図２に示すよう
に、ステンレス鋼材の表面に燐酸塩皮膜層、金属石鹸
層、未反応石鹸層（ステアリン酸ソーダ）が準じ形成さ
れた鋼材が得られる。Thereafter, by drying, as shown in FIG. 2, a steel material having a phosphate film layer, a metal soap layer, and an unreacted soap layer (sodium stearate) formed on the surface of a stainless steel material is obtained.
【００１９】[0019]
【発明の効果】以上に説明したように本発明によれば、
ステンレス鋼材の表面を酸洗した後、いきなり燐酸亜鉛
処理液に浸漬せず、シュウ酸にてステンレス鋼材の表面
にシュウ酸塩皮膜を形成し、この皮膜を酸洗にて除去す
ることで、ステンレス鋼材の表面を活性化し、この活性
化した表面に燐酸亜鉛皮膜を形成するようにしたので、
燐酸亜鉛皮膜の付着力を強固なものにすることができ、
この上に形成する金属石鹸などの潤滑層の保持力も高く
なる。したがって、従来ステンレス鋼の冷間鍛造におい
て問題となっていた焼き付きなどを解消することができ
る。According to the present invention as described above,
After pickling the surface of the stainless steel material, immediately form a oxalate film on the surface of the stainless steel material with oxalic acid without suddenly immersing it in the zinc phosphate treatment solution. Since the surface of the steel material was activated and a zinc phosphate film was formed on the activated surface,
The adhesion of the zinc phosphate film can be strengthened,
The holding power of a lubricating layer such as a metal soap formed thereon also increases. Therefore, seizure, which has conventionally been a problem in cold forging of stainless steel, can be eliminated.
【図１】本発明に係るステンレス鋼の潤滑皮膜処理方法
を工程順に説明したブロック図FIG. 1 is a block diagram illustrating a method for treating a lubricating film on stainless steel according to the present invention in the order of steps.
【図２】本発明方法によって潤滑皮膜が形成されたステ
ンレス鋼材の断面図FIG. 2 is a cross-sectional view of a stainless steel material having a lubricating film formed by the method of the present invention.
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Claims (1)
を特徴とするステンレス鋼の潤滑皮膜処理方法。 第１工程：ステンレス鋼材の表面に付着する油脂分を取
り除く脱脂工程 第２工程：ステンレス鋼材の表面の酸化スケール及び錆
びを取り除く酸洗工程 第３工程：ステンレス鋼材の表面にシュウ酸塩皮膜を形
成する工程 第４工程：ステンレス鋼材の表面に形成した前記シュウ
酸塩皮膜を除去する酸洗工程 第５工程：ステンレス鋼材の表面に燐酸亜鉛皮膜を形成
する工程 第６工程：前記燐酸亜鉛皮膜の上に潤滑層を形成する工
程1. A method for treating a lubricating film on stainless steel, comprising the following first to sixth steps: First step: Degreasing step for removing oils and fats adhering to the surface of stainless steel material Second step: Pickling step for removing oxidation scale and rust on the surface of stainless steel material Third step: Forming oxalate film on the surface of stainless steel material Step 4: Step of pickling to remove the oxalate film formed on the surface of the stainless steel material Step 5: Step of forming a zinc phosphate film on the surface of the stainless steel material Step 6: On the zinc phosphate film Of forming a lubrication layer on the surface
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2001075574A JP2002275651A (en) | 2001-03-16 | 2001-03-16 | Lubricating film treatment method for stainless steel |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2001075574A JP2002275651A (en) | 2001-03-16 | 2001-03-16 | Lubricating film treatment method for stainless steel |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JP2002275651A true JP2002275651A (en) | 2002-09-25 |
Family
ID=18932631
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2001075574A Pending JP2002275651A (en) | 2001-03-16 | 2001-03-16 | Lubricating film treatment method for stainless steel |
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| JP2010514930A (en) * | 2006-12-28 | 2010-05-06 | ポスコ | Method for improving the surface properties of stainless steel for bipolar plates of polymer electrolyte membrane fuel cells |
| KR101219711B1 (en) * | 2010-08-09 | 2013-01-18 | 대영엔지니어링 주식회사 | The electropainting method |
| JP2017107999A (en) * | 2015-12-10 | 2017-06-15 | 昭和電工株式会社 | Heat sink and method of manufacturing the same |
-
2001
- 2001-03-16 JP JP2001075574A patent/JP2002275651A/en active Pending
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| JP2010514930A (en) * | 2006-12-28 | 2010-05-06 | ポスコ | Method for improving the surface properties of stainless steel for bipolar plates of polymer electrolyte membrane fuel cells |
| US9103041B2 (en) | 2006-12-28 | 2015-08-11 | Posco | Method for improving surface properties of the stainless steels for bipolar plate of polymer electrolyte membrane fuel cell |
| WO2009081639A1 (en) * | 2007-12-26 | 2009-07-02 | Sumitomo Metal Industries, Ltd. | Production method of internally-ribbed steel pipe |
| JP4462378B2 (en) * | 2007-12-26 | 2010-05-12 | 住友金属工業株式会社 | Manufacturing method of steel pipe with inner rib |
| JPWO2009081639A1 (en) * | 2007-12-26 | 2011-05-06 | 住友金属工業株式会社 | Manufacturing method of steel pipe with inner rib |
| WO2010047097A1 (en) * | 2008-10-23 | 2010-04-29 | Ntn株式会社 | Wheel bearing device |
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