JPH0733585B2 - Manufacturing method of oil-tempered wire with excellent fatigue resistance - Google Patents
Manufacturing method of oil-tempered wire with excellent fatigue resistanceInfo
- Publication number
- JPH0733585B2 JPH0733585B2 JP3474489A JP3474489A JPH0733585B2 JP H0733585 B2 JPH0733585 B2 JP H0733585B2 JP 3474489 A JP3474489 A JP 3474489A JP 3474489 A JP3474489 A JP 3474489A JP H0733585 B2 JPH0733585 B2 JP H0733585B2
- Authority
- JP
- Japan
- Prior art keywords
- oil
- wire
- tempered wire
- manufacturing
- fatigue 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.)
- Expired - Fee Related
Links
Landscapes
- Application Of Or Painting With Fluid Materials (AREA)
- Heat Treatment Of Steel (AREA)
- Other Surface Treatments For Metallic Materials (AREA)
Description
【発明の詳細な説明】 〔産業上の利用分野〕 この発明は、自動車エンジン用弁ばねをはじめとする一
般コイルばねの材料となるオイルテンパー線の製造方法
に関する。Description: TECHNICAL FIELD The present invention relates to a method for manufacturing an oil tempered wire which is a material for general coil springs such as valve springs for automobile engines.
従来のオイルテンパー線は、材料線の皮剥ぎ−熱処理−
伸線−オイルテンパー処理（連続焼入れ−焼もどし）の
工程で製造されている。Conventional oil-tempered wire strips material wire-heat treatment-
Manufactured in the process of wire drawing-oil tempering (continuous hardening-tempering).
上述した従来の製造法によると、皮剥ぎにより線材表面
の欠陥を完全に除去しても、後工程の熱処理からオイル
テンパー処理部に至るパスラインで線材表面に20μｍ以
下の微小疵が発生する。そのため、素線の引張り強さを
高くした場合、ばね形成時にその疵が起点となって線材
が折損したり、また、その疵が原因で製品化されたばね
の疲労強度が低下すると云う問題があった。According to the above-described conventional manufacturing method, even if the defect on the surface of the wire is completely removed by peeling, a minute flaw of 20 μm or less is generated on the surface of the wire in the pass line from the heat treatment in the subsequent process to the oil temper treatment part. Therefore, when the tensile strength of the wire is increased, there is a problem that the flaw is the starting point when the spring is formed and the wire breaks, and the fatigue strength of the commercialized spring is reduced due to the flaw. It was
この発明は、上記の問題点を解決するため、オイルテン
パー処理後の線材表面を機械的又は電気化学的に研磨し
て線材の表層部を約10〜20μｍの厚さ除去した後、研磨
面上に、三弗化エチレン系又は四弗化エチレン系樹脂を
塗布して目的とするオイルテンパー線を得る。In order to solve the above problems, the present invention mechanically or electrochemically polishes the surface of a wire after oil tempering to remove the surface layer of the wire to a thickness of about 10 to 20 μm, and Then, an ethylene trifluoride-based or tetrafluoroethylene-based resin is applied to obtain a desired oil tempered wire.
〔作用〕 オイルテンパー処理後に線材の表層部を約10〜20μｍの
厚さを研磨して除去すると、皮剥工程の以降に表層部に
発生する微小疵が無くなる。[Operation] When the surface layer portion of the wire rod is removed by polishing to a thickness of about 10 to 20 μm after the oil tempering treatment, fine flaws generated in the surface layer portion after the peeling process are eliminated.
また、表面研磨のみを行うと、皮剥ぎ後の熱処理によっ
て生じるFe3O4リッチの表面スケールが無くなって表面
の滑性が低下し、これに起因したコイリング性の低下が
避けられないが、研磨後の表面にはFe3O4リッチのスケ
ールよりも潤滑性に富む三弗化エチレン系樹脂、或いは
四弗化エチレン系樹脂を塗布してあるため、コイリング
性も従来以上に高まる。In addition, if only surface polishing is performed, the Fe 3 O 4 rich surface scale generated by the heat treatment after peeling is lost and the surface slipperiness is reduced. The subsequent surface is coated with ethylene trifluoride-based resin or tetrafluoroethylene-based resin, which is more lubricious than the Fe 3 O 4 -rich scale, so that the coiling property is also higher than before.
皮剥ぎ−熱処理−伸線−オイルテンパー処理を行った線
材の表面を電解研磨して厚さ約10〜20μｍ除去した。そ
の後、コイリング性の確保のために四弗化エチレン系樹
脂（PTFE）を塗布し、この発明の具体例としてのシリコ
ンクロム鋼オイルテンパー線、高炭素（0.60〜0.70％
Ｃ）シリコンクロム鋼オイルテンパー線及びＶ添加高炭
素（0.1〜0.2％Ｖ、0.60〜0.70％Ｃ）シリコンクロム鋼
オイルテンパー線を得た。The surface of the wire which had been subjected to skinning-heat treatment-wire-drawing-oil temper treatment was electrolytically polished to remove a thickness of about 10 to 20 m. After that, a tetrafluoroethylene resin (PTFE) was applied to secure coiling property, and a silicon chrome steel oil tempered wire as a specific example of the present invention, high carbon (0.60 to 0.70%
C) Silicon chrome steel oil tempered wire and V-added high carbon (0.1 to 0.2% V, 0.60 to 0.70% C) silicon chrome steel oil tempered wire were obtained.
そして、その中の高炭素（0.64％Ｃ）シリコンクロム鋼
オイルテンパー線、φ4mmを試料として従来法で得られ
た同一材質、同一サイズのオイルテンパー線との特性を
比較した。その結果を第１表に示す。Then, the characteristics of a high carbon (0.64% C) silicon chrome steel oil tempered wire among them and the oil tempered wire of the same material and the same size obtained by the conventional method using φ4 mm as a sample were compared. The results are shown in Table 1.
この表から判るように、この発明の方法で製造したオイ
ルテンパー線は疲労特性に優れる。これは、皮剥ぎの後
工程で生じる微小疵が除去されたことによるものであ
る。 As can be seen from this table, the oil tempered wire produced by the method of the present invention has excellent fatigue properties. This is due to the removal of minute flaws generated in the post-skin peeling process.
以下述べたように、この発明の方法で製造したオイルテ
ンパー線は、オイルテンパー処理後の表面研磨により皮
剥ぎの後工程で生じる微小疵を除去し、また、Fe3O4リ
ッチの表面スケールの消失による表面滑性の低下をフッ
ソ系樹脂の塗布によって補なってあるので、コイリング
性を悪化させずに、微小疵に起因したコイリング時の折
損、製品化後のばねの疲労強度低下を無くすことがで
き、コイルばねの信頼性向上、ばね成形時の製品の歩留
り向上等につながると云う効果がある。As described below, the oil-tempered wire produced by the method of the present invention removes microscopic flaws generated in the post-step of peeling by surface polishing after the oil-tempering treatment, and also has a Fe 3 O 4 -rich surface scale. Since the decrease in surface lubricity due to the disappearance is compensated by the application of the fluorine-based resin, there is no deterioration in the coiling property, and there is no breakage at the time of coiling due to micro flaws and no decrease in the fatigue strength of the spring after commercialization. Therefore, there is an effect that the reliability of the coil spring is improved, and the yield of products at the time of spring molding is improved.
Claims (1)
又は電気化学的に研磨して線材の表層部を約10〜20μｍ
の厚さ除去した後、研磨面上に、三弗化エチレン系又は
四弗化エチレン系樹脂を塗布する耐疲労性に優れたオイ
ルテンパー線の製造方法。1. The surface of the wire after the oil temper treatment is mechanically or electrochemically polished so that the surface layer of the wire is about 10 to 20 .mu.m.
A method for producing an oil-tempered wire having excellent fatigue resistance, which comprises applying an ethylene trifluoride-based resin or a tetrafluoroethylene-based resin on the polished surface after removing the thickness of the.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3474489A JPH0733585B2 (en) | 1989-02-14 | 1989-02-14 | Manufacturing method of oil-tempered wire with excellent fatigue resistance |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3474489A JPH0733585B2 (en) | 1989-02-14 | 1989-02-14 | Manufacturing method of oil-tempered wire with excellent fatigue resistance |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH02213417A JPH02213417A (en) | 1990-08-24 |
| JPH0733585B2 true JPH0733585B2 (en) | 1995-04-12 |
Family
ID=12422834
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP3474489A Expired - Fee Related JPH0733585B2 (en) | 1989-02-14 | 1989-02-14 | Manufacturing method of oil-tempered wire with excellent fatigue resistance |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0733585B2 (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP6617922B2 (en) * | 2016-03-22 | 2019-12-11 | 住友電気工業株式会社 | Oil tempered wire |
-
1989
- 1989-02-14 JP JP3474489A patent/JPH0733585B2/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| JPH02213417A (en) | 1990-08-24 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| LAPS | Cancellation because of no payment of annual fees |