JPH0225581A - Pretreatment of stainless steel bar or wire rod by lubrication - Google Patents
Pretreatment of stainless steel bar or wire rod by lubricationInfo
- Publication number
- JPH0225581A JPH0225581A JP17608688A JP17608688A JPH0225581A JP H0225581 A JPH0225581 A JP H0225581A JP 17608688 A JP17608688 A JP 17608688A JP 17608688 A JP17608688 A JP 17608688A JP H0225581 A JPH0225581 A JP H0225581A
- Authority
- JP
- Japan
- Prior art keywords
- stainless steel
- oxalate
- wire rod
- lubrication
- treatment
- 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
- 229910001220 stainless steel Inorganic materials 0.000 title claims abstract description 21
- 239000010935 stainless steel Substances 0.000 title claims abstract description 19
- 238000005461 lubrication Methods 0.000 title claims abstract description 10
- MUBZPKHOEPUJKR-UHFFFAOYSA-N Oxalic acid Chemical compound OC(=O)C(O)=O MUBZPKHOEPUJKR-UHFFFAOYSA-N 0.000 claims abstract description 21
- 150000004767 nitrides Chemical class 0.000 claims abstract description 16
- 238000005121 nitriding Methods 0.000 claims abstract description 15
- 150000002500 ions Chemical class 0.000 claims abstract description 9
- 238000005482 strain hardening Methods 0.000 claims abstract description 4
- 238000002203 pretreatment Methods 0.000 claims description 3
- 239000000463 material Substances 0.000 claims description 2
- 238000000034 method Methods 0.000 abstract description 16
- 229910000831 Steel Inorganic materials 0.000 abstract description 8
- 230000000694 effects Effects 0.000 abstract description 8
- 239000010959 steel Substances 0.000 abstract description 8
- 230000001050 lubricating effect Effects 0.000 abstract description 3
- 238000012545 processing Methods 0.000 description 5
- 239000002436 steel type Substances 0.000 description 5
- 238000010273 cold forging Methods 0.000 description 4
- 229910000963 austenitic stainless steel Inorganic materials 0.000 description 3
- 238000005491 wire drawing Methods 0.000 description 3
- QGZKDVFQNNGYKY-UHFFFAOYSA-N Ammonia Chemical compound N QGZKDVFQNNGYKY-UHFFFAOYSA-N 0.000 description 2
- 229910019142 PO4 Inorganic materials 0.000 description 2
- 238000004140 cleaning Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- NBIIXXVUZAFLBC-UHFFFAOYSA-K phosphate Chemical compound [O-]P([O-])([O-])=O NBIIXXVUZAFLBC-UHFFFAOYSA-K 0.000 description 2
- 239000010452 phosphate Substances 0.000 description 2
- 239000000344 soap Substances 0.000 description 2
- 238000012360 testing method Methods 0.000 description 2
- 239000002253 acid Substances 0.000 description 1
- 239000000654 additive Substances 0.000 description 1
- 229910021529 ammonia Inorganic materials 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 239000011248 coating agent Substances 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 238000010924 continuous production Methods 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000006378 damage Effects 0.000 description 1
- 238000000354 decomposition reaction Methods 0.000 description 1
- 238000004090 dissolution Methods 0.000 description 1
- 238000011156 evaluation Methods 0.000 description 1
- 238000009778 extrusion testing Methods 0.000 description 1
- 229940062993 ferrous oxalate Drugs 0.000 description 1
- 229910052736 halogen Inorganic materials 0.000 description 1
- -1 halogen ions Chemical class 0.000 description 1
- OWZIYWAUNZMLRT-UHFFFAOYSA-L iron(2+);oxalate Chemical compound [Fe+2].[O-]C(=O)C([O-])=O OWZIYWAUNZMLRT-UHFFFAOYSA-L 0.000 description 1
- 239000010410 layer Substances 0.000 description 1
- 229910000734 martensite Inorganic materials 0.000 description 1
- 230000009257 reactivity Effects 0.000 description 1
- 238000004904 shortening Methods 0.000 description 1
- 239000006104 solid solution Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 239000002344 surface layer Substances 0.000 description 1
- 229910000859 α-Fe Inorganic materials 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
- C23C22/00—Chemical surface treatment of metallic material by reaction of the surface with a reactive liquid, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals
- C23C22/05—Chemical surface treatment of metallic material by reaction of the surface with a reactive liquid, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals using aqueous solutions
- C23C22/06—Chemical surface treatment of metallic material by reaction of the surface with a reactive liquid, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals using aqueous solutions using aqueous acidic solutions with pH less than 6
- C23C22/46—Chemical surface treatment of metallic material by reaction of the surface with a reactive liquid, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals using aqueous solutions using aqueous acidic solutions with pH less than 6 containing oxalates
Landscapes
- Chemical & Material Sciences (AREA)
- General Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Mechanical Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Chemical Treatment Of Metals (AREA)
- Solid-Phase Diffusion Into Metallic Material Surfaces (AREA)
Abstract
Description
【発明の詳細な説明】
〔産業上の利用分野〕
本発明は、ステンレス棒・線材に対するシュウ酸塩処理
の前処理方法に関する。DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a pretreatment method for oxalate treatment of stainless steel rods and wires.
−Ｃに、ステンレス棒・線材の伸線・冷間鍛造の際は、
第２図に示すように、脱スケール１０、潤滑性を付与す
るためのシュウ酸塩処理１１、反応型面けん処理１３、
および伸線加工１４の各工程を含んでいる。ここで特に
重要なのが潤滑処理であり、普通側の場合、性能のよい
リン酸塩処理が適用されるが、本発明の対象であるステ
ンレス鋼においては、表面が化学的に不活性であるため
、リン酸塩被膜が形成されず、シュウ酸塩処理が施され
ている。-C, when drawing and cold forging stainless steel rods and wires,
As shown in FIG. 2, descaling 10, oxalate treatment 11 for imparting lubricity, reactive surface cleaning treatment 13,
and wire drawing processing 14. What is particularly important here is lubrication treatment, and in the case of normal phosphate treatment, which has good performance, is applied, but in the case of stainless steel, which is the subject of this invention, the surface is chemically inert. , no phosphate film is formed and oxalate treatment is applied.
しかし、シュウ酸塩処理を施すにしても、ステンレスの
鋼種により、表面活性度が異なるため、−律に適用でき
ず、鋼種に応じて、シュウ酸塩濃度、温度、添加剤、処
理時間等の処理条件を変化させる必要がある。例えば、
耐食性の高いオーステナイト系ステンレスでは表面被膜
を破壊して、表面をエツチングさせるため、Ｆ等のハロ
ゲンイオンがシュウ酸塩処理剤に添加されているのに対
して、フェライト系ステンレス用にはＦ等はあまり添加
されていない。However, even if oxalate treatment is applied, it cannot be applied universally because the surface activity differs depending on the type of stainless steel, and the oxalate concentration, temperature, additives, treatment time, etc. It is necessary to change the processing conditions. for example,
For highly corrosion-resistant austenitic stainless steel, halogen ions such as F are added to the oxalate treatment agent in order to destroy the surface coating and etch the surface. Not much added.
しかし、上記のように鋼種に応じて処理条件を変えるこ
とは、多数の鋼種を処理する場合、処理条件のコントロ
ールが極めて煩雑となる。また、このコントロールを怠
ると、所要のシュウ酸塩被膜が得られず、潤滑性が不十
分なため、次工程での伸線中の断線、加工焼付き等の原
因となり、生産性を阻害することになる。However, changing the processing conditions according to the steel type as described above makes controlling the processing conditions extremely complicated when a large number of steel types are processed. In addition, if this control is neglected, the required oxalate film will not be obtained and the lubricity will be insufficient, causing wire breakage during wire drawing in the next process, process seizure, etc., and hindering productivity. It turns out.
そこで本発明の主たる目的は、シュウ酸塩処理法の処理
条件変更の煩雑さを一掃し、ステンレス鋼の鋼種を問わ
ず、容易かつ画一的に適用できるシュウ酸塩処理の前処
理法を提供することにある。Therefore, the main purpose of the present invention is to provide a pretreatment method for oxalate treatment that can be easily and uniformly applied regardless of the type of stainless steel, by eliminating the complexity of changing the treatment conditions of the oxalate treatment method. It's about doing.
上記課題を解決するための本発明は、ステンレス棒・線
材の冷間加工の前処理としての潤滑処理において、スケ
ール除去後のステンレス棒・線材の表面にシュウ酸塩処
理を施す前に、その表面にイオン窒化を行いＦｅ、 Ｃ
ｒを主体とする窒化物を形成させることを特徴とするも
のである。In order to solve the above problems, the present invention provides a method for lubrication treatment as a pretreatment for cold working of stainless steel rods and wire rods. ion nitriding to Fe, C
This method is characterized by forming a nitride mainly composed of r.
ステンレス鋼表面が化学的に安定なのは、表面に形成さ
れている不働態膜に起因し、しかもこの不働態膜の強弱
は鋼成分に依存する。したがって、多鋼種に対しても同
一のシュウ酸塩処理法により良好な潤滑用被膜を形成さ
せるには、不（１１態膜を破壊して、鋼表面の活性度を
鋼種によらず同一レベルにする必要がある。The chemical stability of the stainless steel surface is due to the passive film formed on the surface, and the strength of this passive film depends on the steel components. Therefore, in order to form a good lubricating film on multiple steel types using the same oxalate treatment method, it is necessary to destroy the non-(11-state film) so that the activity of the steel surface is at the same level regardless of the steel type. There is a need to.
本発明では、イオン窒化法により、鋼表面にＦｅ。In the present invention, Fe is added to the steel surface by ion nitriding.
Ｃｒを主体とする窒化物を形成させ、強固な不働態膜を
破壊することにより、鋼種間の表面活性度の相違をなく
し、同一の潤滑性被膜の形成が可能となった。By forming nitrides mainly composed of Cr and destroying the strong passive film, it has become possible to eliminate differences in surface activity between steel types and form the same lubricating film.
鋼表面に形成されたＦｅ、 Ｃｒを主体とする窒化物に
よる不働態膜の破壊の機構については、推定の域を出な
いが、上記窒化物と鋼素地との間に局部電池が形成され
、表面の不働態膜の溶解を容易にしていること、および
表層の固溶Ｃｒを窒化により固定することにより、不働
態膜の自己修復能を減することが考えられる。Although the mechanism of destruction of the passive film by nitrides mainly composed of Fe and Cr formed on the steel surface is beyond speculation, it is believed that a local battery is formed between the nitrides and the steel base. It is conceivable that the self-healing ability of the passive film is reduced by facilitating the dissolution of the passive film on the surface and by fixing solid solution Cr in the surface layer by nitriding.
以下本発明をさらに詳説する。 The present invention will be explained in more detail below.
本発明では、スケールを除去して表面の清浄化されたス
テンレス棒または線材表面をシュウ酸塩処理する前に、
イオン窒化処理してその表面に、Ｆｅ、 Ｃｒを主体と
する窒化物を形成させることを特徴としている。窒化法
としては、一般にはアンモニア分解ガスを用いるガス窒
化法があるが、Ｆｅ。In the present invention, before applying oxalate treatment to the surface of the stainless steel rod or wire after removing scale and cleaning the surface,
It is characterized by ion nitriding to form a nitride mainly composed of Fe and Cr on the surface. As a nitriding method, there is generally a gas nitriding method using ammonia decomposition gas, but Fe.
Ｃｒとの窒化物形成に長時間を要する上、形成される窒
化物は目的とする表面活性度の均一化への寄与が小さい
ため、本発明では採用せず、代りにイオン窒化法を用い
ることとした。It takes a long time to form a nitride with Cr, and the formed nitride makes little contribution to the desired uniformity of surface activity. Therefore, this method is not adopted in the present invention, and an ion nitriding method is used instead. And so.
イオン窒化法は、後述する実施例で示すように、分から
秒のオーダーの短時間で表面にＦｅ、 Ｃｒ系の窒化物
を形成できるため、工程の連続化の要請にも応えられる
ものである。The ion nitriding method can form Fe and Cr-based nitrides on the surface in a short time, on the order of minutes to seconds, as shown in the examples described later, and therefore can meet the demand for continuous process.
Ｆｅ、Ｃｒ系の窒化物の生成量は、厚みにして１００Å
以上が好ましい、１００人未満では、シュウ酸塩処理の
画一化に効果が少ないからである。他方、上限について
は特に限定しないが、窒化物生成量の過剰な増加は、そ
の生成に長時間を要し、表面が硬化しすぎて、線材、棒
鋼の伸び、硬度等の特性が劣化し、コスト高になるとい
う短所が生じてくるので、これらの点を考慮して上限を
適宜決定すればよい。ただし、−船釣には１０１１ｍ以
下が好ましい。The amount of Fe and Cr-based nitrides produced is 100 Å in thickness.
The above is preferable because if the number of participants is less than 100, the effect on uniformity of oxalate treatment will be small. On the other hand, although there is no particular limit on the upper limit, an excessive increase in the amount of nitrides produced will take a long time to produce, the surface will become too hard, and the properties such as elongation and hardness of wire rods and steel bars will deteriorate. Since this has the disadvantage of high cost, the upper limit may be appropriately determined in consideration of these points. However, - for boat fishing, the distance is preferably 1011 m or less.
本発明におけるシュウ酸塩処理法としては、通常、ステ
ンレス鋼の冷間加工の前処理としての潤滑処理として採
用されている公知のシュウ酸塩処理技術をそのまま適用
できる。As the oxalate treatment method in the present invention, a known oxalate treatment technique that is normally employed as a lubrication treatment as a pretreatment for cold working of stainless steel can be applied as is.
本発明の対象となるステンレス鋼としては、オーステナ
イト系、マルテンサイト系、フェライト系のいずれの鋼
種でもよい。The stainless steel to which the present invention is applied may be any of austenitic, martensitic, and ferritic steels.
次に実施例を説明する。 Next, an example will be explained.
（実施例１）
径２４龍φのオーステナイト系ステンレス鋼（ｓｕｓ
３０４）を第１図に示すような処理工程により、２３１
１φ伸線材とし、その後冷間鍛造試験（前方多段押出し
試験）を行った。第１図中、脱スケール１はフッ硝酸（
ＩＩＦ３％、 ｌｌＮＯ３１０％）を用い、室温で２０
分間処理した。イオン窒化２は後記第１表に記載した通
りである。シュウ酸塩処理３はシュウ酸第１鉄（日本バ
ーカー製、フェルボンド３８０３、全強度１２ｐｔ）を
用い、９０℃で１５分間行った。また、反応型面けん処
理４は、石けん（日本バーカー社製、「パルーブ２３４
Ｊ 、濃度３ｐｔ）により、８０℃で６０秒間行った。(Example 1) Austenitic stainless steel (sus
304) through the processing steps shown in Figure 1, 231
A 1φ wire drawing material was prepared, and then a cold forging test (forward multistage extrusion test) was conducted. In Figure 1, descaling 1 is fluoronitric acid (
IIF 3%, 11NO3 10%) at room temperature for 20
Processed for minutes. Ionic nitriding 2 is as described in Table 1 below. Oxalate treatment 3 was performed at 90° C. for 15 minutes using ferrous oxalate (Felbond 3803, manufactured by Nippon Barker, total strength 12 pt). In addition, the reactive surface soap treatment 4 uses soap (manufactured by Nippon Barker Co., Ltd., “Parub 234
J, concentration 3pt) at 80°C for 60 seconds.
また、冷間鍛造のパススケジュールは、
２３φ→２１．３φ→１９．９φ→１８．４φ→１６．
９φ→１５．６φ→１４．４φ→１３．３φ
とした。Also, the pass schedule for cold forging is as follows: 23φ→21.3φ→19.9φ→18.4φ→16.
9φ → 15.6φ → 14.4φ → 13.3φ.
潤滑性の評価は、冷間鍛造での焼付きの有無により判定
し、焼付きなしを○、焼付き発生を×とした。The evaluation of lubricity was determined by the presence or absence of seizure during cold forging, and no seizure was evaluated as ○, and occurrence of seizure was evaluated as ×.
結果を第１表に示す。The results are shown in Table 1.
上表より、イオン窒化を行わない場合、ガス窒化を行っ
た場合はいずれも反応性に優れる窒化物層の生成は不可
能であることがわかった。From the above table, it was found that it was impossible to generate a nitride layer with excellent reactivity when ion nitriding was not performed and when gas nitriding was performed.
（実施例２）
フェライト系ステンレス鋼として、ＳＵＳ ４１０を用
い、実施例１と同様のテストを行い、評価した。(Example 2) Using SUS 410 as the ferritic stainless steel, the same test as in Example 1 was conducted and evaluated.
各処理条件、結果を第２表に示す。Table 2 shows each treatment condition and result.
〈考察〉
上記のように、潤滑前処理として、イオン窒化により表
面にＦｅ、 Ｃｒを主体とする窒化物を形成させること
により、オーステナイト系ステンレスではフェライト系
と同一の潤滑処理が可能となった。<Discussion> As mentioned above, by forming nitrides mainly composed of Fe and Cr on the surface by ion nitriding as a lubrication pretreatment, austenitic stainless steel can be subjected to the same lubrication treatment as ferritic stainless steel.
またフェライト系では時間の短縮化が可能となった。Also, with ferrite type, it is possible to shorten the time.
［発明の効果〕
以上の通り、本発明によれば、ステンレスの鋼種を問わ
ず、同一の潤滑付与処理が可能となり、煩雑なシュウ酸
塩処理条件のコントロール等が不要となり、処理時間の
短縮も可能となった。[Effects of the Invention] As described above, according to the present invention, it is possible to perform the same lubrication treatment regardless of the type of stainless steel, eliminating the need for complicated control of oxalate treatment conditions, and shortening the treatment time. It has become possible.
第１図は本発明の処理工程図、第２図は従来法の処理工
程図である。FIG. 1 is a process diagram of the present invention, and FIG. 2 is a process diagram of the conventional method.
Claims (1)
シュウ酸塩潤滑処理において、スケール除去後のステン
レス棒・線材の表面にシュウ酸塩処理を施す前に、その
表面にイオン窒化を行いＦｅ、Ｃｒを主体とする窒化物
を形成させることを特徴とするステンレス鋼材の潤滑前
処理方法。(1) In oxalate lubrication treatment as a pretreatment for cold working of stainless steel rods and wire rods, before applying oxalate treatment to the surface of stainless steel rods and wire rods after scale removal, ion nitriding is performed on the surface of the stainless steel rods and wire rods. A lubrication pretreatment method for stainless steel material, characterized by forming nitrides mainly composed of Fe and Cr.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP17608688A JPH0225581A (en) | 1988-07-14 | 1988-07-14 | Pretreatment of stainless steel bar or wire rod by lubrication |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP17608688A JPH0225581A (en) | 1988-07-14 | 1988-07-14 | Pretreatment of stainless steel bar or wire rod by lubrication |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH0225581A true JPH0225581A (en) | 1990-01-29 |
Family
ID=16007472
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP17608688A Pending JPH0225581A (en) | 1988-07-14 | 1988-07-14 | Pretreatment of stainless steel bar or wire rod by lubrication |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0225581A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5422322A (en) * | 1993-02-10 | 1995-06-06 | The Stackpole Corporation | Dense, self-sintered silicon carbide/carbon-graphite composite and process for producing same |
-
1988
- 1988-07-14 JP JP17608688A patent/JPH0225581A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5422322A (en) * | 1993-02-10 | 1995-06-06 | The Stackpole Corporation | Dense, self-sintered silicon carbide/carbon-graphite composite and process for producing same |
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