JPS61130459A - High-hardness non-magnetic shaft having superior corrosion resistance - Google Patents
High-hardness non-magnetic shaft having superior corrosion resistanceInfo
- Publication number
- JPS61130459A JPS61130459A JP25190984A JP25190984A JPS61130459A JP S61130459 A JPS61130459 A JP S61130459A JP 25190984 A JP25190984 A JP 25190984A JP 25190984 A JP25190984 A JP 25190984A JP S61130459 A JPS61130459 A JP S61130459A
- Authority
- JP
- Japan
- Prior art keywords
- magnetic
- shaft
- corrosion resistance
- cold
- steel
- 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.)
- Granted
Links
- 230000007797 corrosion Effects 0.000 title claims description 30
- 238000005260 corrosion Methods 0.000 title claims description 30
- 230000035699 permeability Effects 0.000 claims description 22
- 238000001816 cooling Methods 0.000 claims description 8
- 238000012545 processing Methods 0.000 claims description 6
- 229910052804 chromium Inorganic materials 0.000 claims description 5
- 230000006835 compression Effects 0.000 claims description 5
- 238000007906 compression Methods 0.000 claims description 5
- 238000005520 cutting process Methods 0.000 claims description 4
- 238000005098 hot rolling Methods 0.000 claims description 4
- 229910052759 nickel Inorganic materials 0.000 claims description 4
- 229910052799 carbon Inorganic materials 0.000 claims description 3
- 239000012535 impurity Substances 0.000 claims description 3
- 229910052710 silicon Inorganic materials 0.000 claims description 3
- 238000005491 wire drawing Methods 0.000 claims description 2
- 229910000831 Steel Inorganic materials 0.000 description 18
- 239000010959 steel Substances 0.000 description 18
- JEIPFZHSYJVQDO-UHFFFAOYSA-N iron(III) oxide Inorganic materials O=[Fe]O[Fe]=O JEIPFZHSYJVQDO-UHFFFAOYSA-N 0.000 description 13
- 239000011572 manganese Substances 0.000 description 9
- 229910001566 austenite Inorganic materials 0.000 description 8
- 230000005389 magnetism Effects 0.000 description 8
- 239000000203 mixture Substances 0.000 description 8
- 239000011651 chromium Substances 0.000 description 7
- 230000000694 effects Effects 0.000 description 6
- 238000002474 experimental method Methods 0.000 description 4
- 229910052748 manganese Inorganic materials 0.000 description 4
- 150000001247 metal acetylides Chemical class 0.000 description 4
- 230000007423 decrease Effects 0.000 description 3
- 230000006698 induction Effects 0.000 description 3
- 230000000087 stabilizing effect Effects 0.000 description 3
- 238000005482 strain hardening Methods 0.000 description 3
- 229910000851 Alloy steel Inorganic materials 0.000 description 2
- 230000007547 defect Effects 0.000 description 2
- 230000004907 flux Effects 0.000 description 2
- 230000006872 improvement Effects 0.000 description 2
- 229910052751 metal Inorganic materials 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 239000002244 precipitate Substances 0.000 description 2
- 238000001556 precipitation Methods 0.000 description 2
- 238000010008 shearing Methods 0.000 description 2
- 239000006104 solid solution Substances 0.000 description 2
- 238000003860 storage Methods 0.000 description 2
- 238000005728 strengthening Methods 0.000 description 2
- 238000012360 testing method Methods 0.000 description 2
- 241000251468 Actinopterygii Species 0.000 description 1
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- VYZAMTAEIAYCRO-UHFFFAOYSA-N Chromium Chemical compound [Cr] VYZAMTAEIAYCRO-UHFFFAOYSA-N 0.000 description 1
- 229910001208 Crucible steel Inorganic materials 0.000 description 1
- PWHULOQIROXLJO-UHFFFAOYSA-N Manganese Chemical compound [Mn] PWHULOQIROXLJO-UHFFFAOYSA-N 0.000 description 1
- 229910018651 Mn—Ni Inorganic materials 0.000 description 1
- 241000221535 Pucciniales Species 0.000 description 1
- 229910002065 alloy metal Inorganic materials 0.000 description 1
- 229910000963 austenitic stainless steel Inorganic materials 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 230000003749 cleanliness Effects 0.000 description 1
- 239000002131 composite material Substances 0.000 description 1
- 238000005336 cracking Methods 0.000 description 1
- 239000000835 fiber Substances 0.000 description 1
- 230000006870 function Effects 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000011159 matrix material Substances 0.000 description 1
- 238000002844 melting Methods 0.000 description 1
- 230000008018 melting Effects 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 238000007670 refining Methods 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 238000005096 rolling process Methods 0.000 description 1
- 239000010703 silicon Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Chemical compound O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
- 238000004804 winding Methods 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D8/00—Modifying the physical properties by deformation combined with, or followed by, heat treatment
- C21D8/06—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of rods or wires
- C21D8/065—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of rods or wires of ferrous alloys
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Manufacturing & Machinery (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Crystallography & Structural Chemistry (AREA)
- Mechanical Engineering (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Heat Treatment Of Steel (AREA)
Abstract
Description
【発明の詳細な説明】
（産業上の利用分野）
本発明は、耐食性のすぐれた高硬度非磁性軸、特に画像
音声記憶装置（ＶＴＲ）のビデオテープレコーダー、ビ
デオカメラ、ビデオテーブカセソト、音響装置のテープ
レコーダー、オーディオディスク、ダイレクトドライブ
モーター、コンピューター記憶装置等磁気を利用する装
置（以下、単に「磁気装置」と総称することもある）に
各種軸として使用する、表面硬さＨｖ ５００以上、透
磁率１゜０１以下であって、耐食性のすぐれた高硬度非
磁性軸に関する。Detailed Description of the Invention (Industrial Application Field) The present invention provides a high hardness non-magnetic shaft with excellent corrosion resistance, especially for use in video tape recorders, video cameras, video tape cassettes, and audio recording devices (VTRs). Surface hardness of Hv 500 or more, used as various shafts in devices that utilize magnetism (hereinafter sometimes simply referred to as "magnetic devices") such as tape recorders, audio discs, direct drive motors, computer storage devices, etc. The present invention relates to a highly hard non-magnetic shaft having a magnetic permeability of 1°01 or less and excellent corrosion resistance.
（従来の技術）
上述のような磁気を利用する装置に使用される軸として
はＶＴＲに使用するシリンダー軸、キャプスタン軸、案
内軸（ガイド、ガイドボール、ガイドピン、ガイドロー
ラｅｔｃ、 ）さらには磁気ディスクの回転軸等（以下
、本明細書では「軸」と総称する）があり、それらには
磁気的特性のみならず、機械的な特性においても厳しい
要求がなされている。(Prior Art) The shafts used in devices that utilize magnetism as described above include cylinder shafts, capstan shafts, guide shafts (guides, guide balls, guide pins, guide rollers, etc.) used in VTRs, and even There are rotating shafts of magnetic disks (hereinafter collectively referred to as "shafts" in this specification), and strict requirements are placed on them not only in terms of magnetic properties but also in mechanical properties.
例えば、ＶＴＲに使用するシリンダー軸は、磁気ヘッド
と一体的に組立てられ、このシリンダー軸と直結したモ
ーターからの回転を磁気ヘッドに伝える。この場合モー
ターの強力な磁気がシリンダー軸に誘導されるとこれに
直結した磁気ヘッドの磁気を不安定にし、画像音声の集
録再生に歪を与えてしまう。シリンダー軸としてはこの
ような磁気誘導を防止するため、非磁性特性が重要であ
る。またシリンダー軸が摩耗すると回転むらを生じ、磁
気テープの走行が不安定になり集録再生に歪を与えるこ
とになる。軸の摩耗を極少にするため軸表面硬さなどの
機械的特性にもすぐれた特性が要求される。For example, a cylinder shaft used in a VTR is assembled integrally with a magnetic head, and transmits rotation from a motor directly connected to the cylinder shaft to the magnetic head. In this case, when the strong magnetism of the motor is induced into the cylinder shaft, it destabilizes the magnetism of the magnetic head directly connected to it, causing distortion in the recording and playback of images and sounds. In order to prevent such magnetic induction, non-magnetic properties are important for the cylinder shaft. Furthermore, when the cylinder shaft wears out, uneven rotation occurs, making the running of the magnetic tape unstable and distorting recording and playback. In order to minimize shaft wear, excellent mechanical properties such as shaft surface hardness are required.
ビデオテープレコーダーと音響用テープレコーダーのキ
ャプスタン軸は磁気テープと直接接触走行する。一方、
ダイレクトドライブモーターのキャプスタン軸はこの軸
と直結したモーターの強力な磁界の変化で回転する。し
たがって、いずれの場合にあっても、もし、キャプスタ
ン軸に磁気が誘導したり、磁束が残留するとこれに接触
する磁気テープの記憶を狂わせることになる。The capstan shafts of video tape recorders and audio tape recorders run in direct contact with the magnetic tape. on the other hand,
The capstan shaft of a direct drive motor rotates due to changes in the strong magnetic field of the motor that is directly connected to this shaft. Therefore, in any case, if magnetism is induced in the capstan shaft or magnetic flux remains, the memory of the magnetic tape that comes into contact with it will be disturbed.
なお、キャプスタン軸の回転を支えるために含油合金メ
タルを使用するが、この軸のメタル接触面が摩耗すると
軸の回転がむらになり磁気テープの走行が不安定になる
。これは高品質磁気装置としては致命的なことである。Note that an oil-impregnated alloy metal is used to support the rotation of the capstan shaft, but if the metal contact surface of this shaft wears out, the rotation of the shaft becomes uneven and the running of the magnetic tape becomes unstable. This is fatal for a high quality magnetic device.
ＶＴＲ，ＶＴＲカメラ、ＶＴＲカセットのガイド、ガイ
ドポール、ガイドビン、ガイドローラーなどの磁気テー
プ案内軸は、磁気テープと直接接触するため、非磁性で
あることが必要であるばかりでなく、このような案内軸
はテープが高速で摺動するため摺動摩耗に強いことも必
要であり、また軸にきずがつくと接触テープにもきずを
つけるため、摺動摩耗に強くきずがつきにくいことが要
求される。Magnetic tape guide shafts such as guides, guide poles, guide bins, and guide rollers for VTRs, VTR cameras, and VTR cassettes come into direct contact with the magnetic tape, so they not only need to be non-magnetic, but also must be non-magnetic. The guide shaft must be resistant to sliding wear as the tape slides at high speed, and if the shaft is scratched, the contact tape will also be scratched, so it must be resistant to sliding wear and less susceptible to scratches. be done.
同様に、音響装置の磁気ディスク、コンピュータのフロ
ッピーディスク、電子スチルカメラは磁気ディスクを使
用する。この装置の磁気ディスクの回転軸と磁気ヘッド
の案内軸にはすぐれた非磁性と耐摺動摩耗性が要求され
る。Similarly, magnetic disks in audio equipment, floppy disks in computers, and electronic still cameras use magnetic disks. The rotating shaft of the magnetic disk and the guide shaft of the magnetic head of this device are required to have excellent non-magnetism and resistance to sliding wear.
このような磁気を利用した装置の近年における進歩はめ
ざましくそれに伴い要求される特性も益々厳しいものと
なっている。現在非磁性軸として目標となる特性は透磁
率１．０１以下、表面硬さＨｖ ５００以上である。In recent years, devices using magnetism have made remarkable progress, and the required characteristics have become increasingly strict. Currently, the target properties for a non-magnetic shaft are a magnetic permeability of 1.01 or less and a surface hardness of Hv 500 or more.
すなわち、磁気テープ、磁気ディスク、磁気ヘッドを使
用する装置の案内軸と、強力な磁界中で回転するダイレ
クトドライブモーターの回転軸とは、磁気誘導と残留磁
束密度とを最少限にするために実用上透磁率が１．０１
以下であることが必要である。That is, the guide shafts of devices that use magnetic tapes, magnetic disks, and magnetic heads, and the rotating shafts of direct drive motors that rotate in strong magnetic fields, are designed to minimize magnetic induction and residual magnetic flux density. Upper magnetic permeability is 1.01
It is necessary that the following is true.
また同時に、モーターと直結したシリンダー軸やダイレ
クトドライブキャプスタン軸などの回転軸は、メタルと
の接触面の摺動摩耗を小さくする必要がある。さらに、
磁気テープを案内する案内軸はテープとの接触面の摺動
摩耗を小さくする必要がある。このため磁気装置用軸と
しては高い表面硬さも要求され、実用上ビッカース硬さ
Ｈｖ ５００以上が必要である。At the same time, rotating shafts such as cylinder shafts and direct drive capstan shafts that are directly connected to motors need to minimize sliding wear on their contact surfaces with metal. moreover,
The guide shaft that guides the magnetic tape needs to minimize sliding wear on its contact surface with the tape. For this reason, shafts for magnetic devices are required to have high surface hardness, and practically require a Vickers hardness of Hv 500 or more.
ところで、磁気テープ、磁気ディスク、磁気ヘッドなど
を使用する装置は、さびの発生があってはならない。さ
びは剥離しやすく残留磁気がある。By the way, devices using magnetic tapes, magnetic disks, magnetic heads, etc. must be free from rust. Rust peels off easily and has residual magnetism.
軸に発生したさ′びが剥離し、テープ、ディスク、ヘッ
ドに付着するとその集録、再生を狂はせ不安定になるか
らである。また、剥離したさびが軸の回転部分や摺動部
分に付着すると軸が摩耗しやすくなる。一方、テープに
付着するとテープにきずをつける原因になるため特に耐
誘性のすぐれた耐食性が要求される。例えば６０℃、９
５％の恒温恒湿槽内で１００時間保持しても微少なさび
も発生しないすぐれた耐食性（本明細書では特にことわ
らない限りかかる耐食性を単に“耐食性”という）が要
求されるのである。This is because if the rust that develops on the shaft peels off and adheres to the tape, disk, or head, recording and playback will be disrupted and become unstable. Furthermore, if the peeled rust adheres to the rotating or sliding parts of the shaft, the shaft will be more likely to wear out. On the other hand, if it adheres to the tape, it may cause scratches on the tape, so it is particularly required to have excellent corrosion resistance and resistance to induction. For example, 60℃, 9
Excellent corrosion resistance (herein, unless otherwise specified, such corrosion resistance is simply referred to as "corrosion resistance") is required, with no slight rust occurring even after 100 hours of storage in a 5% constant temperature and humidity chamber.
すなわち、磁気装置用の軸は稼働中は温度が上昇し、装
置が停止すると温度が降下する。また外気の気温の上昇
降下にも影響される。軸の温度が急激に降下すると外気
中の水蒸気が結露し水分が付着することがある。その結
果発生するさびは磁気の集録再生を狂わせ、スムーズな
回転摺動を阻害するため、このように水分や湿気により
発銹してはならない。自然環境の大気の条件として高い
温度（６０℃）と高い湿度（９５％）でも発銹しない耐
食性が必要である。That is, the temperature of the shaft for a magnetic device increases during operation, and decreases when the device is stopped. It is also affected by the rise and fall of the outside temperature. If the temperature of the shaft suddenly drops, water vapor in the outside air may condense and moisture may adhere to it. Rust that occurs as a result disturbs magnetic acquisition and reproduction and inhibits smooth rotation and sliding, so moisture and humidity must not cause rust. It is necessary to have corrosion resistance that does not cause rust even under the atmospheric conditions of the natural environment, such as high temperature (60°C) and high humidity (95%).
従来かかる用途に使用する透磁率１．０１以下の非磁性
で高い表面硬さと耐食性のすぐれた軸は、ＳＵＳ ３０
４ 、ＳＯ５３０５，５ＩＩＳ ３１６ （７）オース
テナイト系ステンレス鋼、あるいは高Ｍｎ系オーステナ
イト鋼から製造されていた。Conventionally, the shaft used for such applications is SUS 30, which is non-magnetic, has a magnetic permeability of 1.01 or less, has high surface hardness, and has excellent corrosion resistance.
4, SO5305, 5IIS 316 (7) Manufactured from austenitic stainless steel or high Mn austenitic steel.
Ｓ［ＩＳ ３０４．５ＩＪＳ ３０５ 、ＳＯ５３１６
はすぐれた耐食性があるが、透磁率１．０１以下の非磁
性特性を付与しようとすると硬さＨｖ ３２０以下と軟
質となってしまう。耐摩耗性を得るためできるだけ硬化
させると５ＩＩＳ ３０４はＨｖ ３７０ですでに透磁
率２．５以上となり、ＳＯＳ ３０５はＨｖ ３４０で
透磁率１．０３以上、ＳＵＳ ３１６はＩｌｖ ３８０
で透磁率１．０２以上の高い透磁率となり、透磁率１．
０１以下の非磁性で表面硬さＨｖ ５００以上の耐摩耗
性のある軸は得られない。S [IS 304.5 IJS 305, SO5316
Although it has excellent corrosion resistance, when trying to impart non-magnetic properties with a magnetic permeability of 1.01 or less, it becomes soft with a hardness of Hv 320 or less. When hardened as much as possible to obtain wear resistance, 5IIS 304 already has a magnetic permeability of 2.5 or more at Hv 370, SOS 305 has a magnetic permeability of 1.03 or more at Hv 340, and SUS 316 has an Ilv 380.
The magnetic permeability is high, with a magnetic permeability of 1.02 or more, and the magnetic permeability is 1.02.
It is not possible to obtain a shaft that is non-magnetic with a surface hardness of 0.01 or less and has wear resistance with a surface hardness of Hv 500 or more.
ところで、高Ｍｎ鋼からは耐摩耗性のすぐれた、表面硬
さＨｖ ５００以上、透磁率１．０１以下の非磁性の軸
が得られるが、温度６０℃、湿度９５％の恒温恒湿槽内
で容易に発銹し、耐食性のすぐれた軸が得られない。By the way, a non-magnetic shaft with excellent wear resistance, a surface hardness of Hv 500 or more, and a magnetic permeability of 1.01 or less can be obtained from high Mn steel. It rusts easily, making it impossible to obtain a shaft with excellent corrosion resistance.
（発明が解決すべき問題点）
ここに本発明の目的とするところは、耐食性にすぐれ、
併せて透磁率１．０１以下、表面硬度Ｈｖ ５００以上
のすぐれた非磁性特性および機械的特性を備えた磁気装
置用の軸を提供することである。(Problems to be Solved by the Invention) The object of the present invention is to provide a material with excellent corrosion resistance,
Another object of the present invention is to provide a shaft for a magnetic device that has excellent nonmagnetic properties and mechanical properties, such as a magnetic permeability of 1.01 or less and a surface hardness of Hv 500 or more.
（問題点を解決するための手段）
本件発明者は上述の目的を達成すべく鋭意研究を続けた
ところ、多くの非磁性鋼のうち特定組成のものが耐食性
とともに加工硬化能が特にすぐれていることを見い出し
て本発明を完成した。(Means for Solving the Problems) The inventor of the present invention continued his intensive research to achieve the above-mentioned purpose, and found that among many non-magnetic steels, those with a specific composition have particularly excellent corrosion resistance and work hardening ability. They discovered this and completed the present invention.
すなわち、本発明の要旨とするところは、重量％で、
ｃ ： ０．１０−０．５０％、 Ｓｉ ： ０．６０
％以下、Ｍｎ ： １４〜２０％、 Ｎｉ ： Ｑ
、３〜２．０％、Ｃｒ ： １６〜１８％、 Ｎ
： ０．０４〜０．４％、残部Ｆｅおよび不可避不純物
からなる組成を有する鋼から成り、かつｔｏｏｏ℃以上
、１０５０℃以下の温度での熱間圧延、該熱間圧延終了
後の１５℃／ｓｅｃ以上の冷却速度での冷却、冷間伸線
、剪断刃による冷間剪断切断、さらにロールによる冷間
圧縮加工を経て得られた、表面硬さＨｖ ５００以上お
よび透磁率１．０１以下であることを特徴とする、耐食
性のすぐれた高硬度非磁性軸である。That is, the gist of the present invention is, in weight %, c: 0.10-0.50%, Si: 0.60
% or less, Mn: 14-20%, Ni: Q
, 3-2.0%, Cr: 16-18%, N
: Made of steel having a composition of 0.04 to 0.4%, the balance Fe and unavoidable impurities, and hot rolled at a temperature of 1050°C or higher, 15°C/ Surface hardness Hv 500 or more and magnetic permeability 1.01 or less obtained through cooling at a cooling rate of sec or more, cold wire drawing, cold shear cutting with a shear blade, and cold compression processing with a roll. This is a highly hard, non-magnetic shaft with excellent corrosion resistance.
このように、本発明によれば、冷間伸線鋼線に対し剪断
刃による冷間剪断切断とロールによる冷間圧縮加工を加
えることにより軸表面に高い塑性変形を加え、特に表面
０．１ｍｍ以上の厚さの層を冷間圧縮し、Ｈｖ ５００
〜５７０という高い表面硬さが得られ、また要求される
耐摺動摩耗性に必要なＨｖ ５００以上の表面硬さが得
られるのである。As described above, according to the present invention, high plastic deformation is applied to the shaft surface by applying cold shear cutting with a shear blade and cold compression processing with a roll to a cold drawn steel wire. A layer with a thickness of over 500 Hv is cold compressed.
A high surface hardness of ~570 can be obtained, and a surface hardness of Hv 500 or higher, which is necessary for the required sliding wear resistance, can be obtained.
本発明はその１の態様によれば、上記鋼組成を有する、
耐食性にすぐれた、表面硬さＨｖ ５００以上、透磁率
１．０１以下の磁気テープの案内軸である。According to one aspect of the present invention, the steel has the above-mentioned composition.
This is a magnetic tape guide shaft with excellent corrosion resistance, a surface hardness of Hv 500 or more, and a magnetic permeability of 1.01 or less.
さらに別の態様によれば、上記鋼組成を有する、耐食性
にすぐれた、表面硬さ）ｌｖ ５００以上、透磁率１．
０１以下の磁気装置駆動用のシリンダー軸である。According to yet another aspect, the steel has the above-mentioned composition, has excellent corrosion resistance, has a surface hardness of lv 500 or more, and has a magnetic permeability of 1.
This is a cylinder shaft for driving a magnetic device of 01 or less.
なお、さらに別の態様によれば、上記鋼組成を有する、
耐食性にすぐれた、表面硬さＨｖ ｓｏｏ以上、透磁率
１．０１以下の磁気テープ用のキヤプスタン軸である。In addition, according to yet another aspect, having the above steel composition,
This is a capstan shaft for magnetic tape with excellent corrosion resistance, a surface hardness of Hv soo or more, and a magnetic permeability of 1.01 or less.
（作用）
（１３鋼組成上の特徴：
本発明にあっては上述のように、ＭｎとＣｒの含有量が
高（、ＮｉとＮを含むため安定したオーステナイト系と
することができ、冷間加工によって表面硬さＨｖ ５０
０以上の軸とした場合でも一般に透磁率１．００２〜１
、００８と非磁性であって、本発明の目的である透磁
率１．０１以下を十分に満足している。(Function) (13 Characteristics of steel composition: As mentioned above, in the present invention, the content of Mn and Cr is high (contains Ni and N, so it can be made into a stable austenitic system, and Surface hardness Hv 50 due to processing
Even when the axis is 0 or more, the magnetic permeability is generally 1.002 to 1.
, 008, which is non-magnetic and fully satisfies the objective of the present invention, which is a magnetic permeability of 1.01 or less.
しかも、Ｃ「含有量が１６％以上あり、６０℃、９５％
の恒温恒湿槽内で１００時間保持しても直径０゜５μｍ
以上の微少なさびも発生しない耐食性のすぐれた軸であ
る。Furthermore, the C content is 16% or more, and at 60℃, 95%
Even if kept in a constant temperature and humidity chamber for 100 hours, the diameter remains 0°5 μm.
It is a shaft with excellent corrosion resistance that does not cause even the slightest rust.
本発明において鋼組成を上述のように限定した理由は次
の通りである。The reason why the steel composition is limited as described above in the present invention is as follows.
Ｃ（炭素）
Ｃはオーステナイトを安定にすると同時に固溶強化に寄
与する元素であって、本発明においては強度の確保のた
め０．１０％以上含有させる必要がある。一方、０．５
０％を超えるとオーステナイト結晶粒界に多量の炭化物
が析出しこれにより線材の延性が劣化すると共に、冷間
加工性や耐食性の低下につながる。したがって、本発明
にあってはＣ含有量を０．１０〜０．５０％と限定した
。C (Carbon) C is an element that stabilizes austenite and at the same time contributes to solid solution strengthening, and in the present invention, it must be contained in an amount of 0.10% or more to ensure strength. On the other hand, 0.5
If it exceeds 0%, a large amount of carbide will precipitate at the austenite grain boundaries, which will deteriorate the ductility of the wire and lead to a decrease in cold workability and corrosion resistance. Therefore, in the present invention, the C content is limited to 0.10 to 0.50%.
Ｓｉ （ケイ素）
Ｓｉは通常脱酸剤として精錬過程で溶鋼中に添加される
が、０．６０％を超えると非金属介在物が増加して鋼の
清浄度の悪化をもたらすため、その上限を０．６０％と
定めた。Si (Silicon) Si is normally added to molten steel as a deoxidizing agent during the refining process, but if it exceeds 0.60%, nonmetallic inclusions will increase and the cleanliness of the steel will deteriorate, so the upper limit should not be exceeded. It was set at 0.60%.
Ｍｎ （マンガン）
Ｍｎは安価にオーステナイト組織を安定化させる作用が
あるが、本発明にあっては鋼の特性を非磁性とするに必
要な元素である。そのためには１４％以上含有させる必
要がある。一方、２０％を超えても十分な改善は得られ
ないことから本発明では１４〜２０％と定めた。また非
磁性と耐食性の双方をさらに一層満足させる範囲として
は１５〜１８％がより望まし範囲といえる。Mn (Manganese) Mn has the effect of stabilizing the austenite structure at low cost, but in the present invention, it is an element necessary to make the steel non-magnetic. For this purpose, it is necessary to contain 14% or more. On the other hand, since sufficient improvement cannot be obtained even if it exceeds 20%, the present invention sets it at 14 to 20%. Further, a more desirable range is 15 to 18% to further satisfy both nonmagnetism and corrosion resistance.
Ｎｉ にノケル）
Ｎｉはオーステナイト組織を安定にし耐食性を改善する
のに有効な元素であり、本発明の目的には、少なくとも
０．３％以上添加する必要がある。しかし２，０％を超
えるとオーステナイト組繊の安定化に対してはｉｆＡ刺
であるばかりでなく、コスト上昇を招き好ましくない。Ni) Ni is an effective element for stabilizing the austenite structure and improving corrosion resistance, and for the purpose of the present invention, it is necessary to add at least 0.3% or more. However, if it exceeds 2.0%, it is not only undesirable for stabilizing the austenite composite fibers, but also increases costs.
したがって、本発明にあってＮｉ含有量の上限を２．０
％と定めた。好ましくは、１．Ｏ〜２．０％である。Therefore, in the present invention, the upper limit of the Ni content is set to 2.0
%. Preferably, 1. It is O~2.0%.
Ｃｒ （クロム）
ＣｒはＭｎ−Ｎｉを含む鋼のオーステナイト組織を著し
く安定なものにすると共にＨ１層欠陥エネルギーを小さ
くすることにより加工硬化能を高める効果がある。本発
明においてこれらの効果に加え耐食性の改善を併せては
かるには１６％以上の含有が必要である。しかし１８％
を超えると前記効果にそれ以上の向上が認められない。Cr (Chromium) Cr makes the austenite structure of steel containing Mn-Ni extremely stable, and has the effect of increasing work hardening ability by reducing the H1 layer defect energy. In the present invention, in order to improve corrosion resistance in addition to these effects, the content must be 16% or more. But 18%
If it exceeds this, no further improvement in the above effect will be observed.
したがって、本発明においてＣ「の含有量は１６〜１８
％と定めた。かかる狭い範囲において非磁性軸として特
にすぐれた効果が得られるのである。Therefore, in the present invention, the content of C' is 16 to 18
%. In such a narrow range, particularly excellent effects can be obtained as a non-magnetic shaft.
Ｎ （Ｍ素）
ＮはＣと同様オーステナイト組織を安定にすると同時に
固溶強化に寄与する元素である。Ｎは耐応力腐食割れ性
を改善する効果もあり、そのためには本発明にあっては
０．０４％以上の含有が必要である。これによって、オ
ーステナイト組織の安定、耐食性改善等を目的としたＮ
ｉ等の高価な元素の多量添加を回避することもできる。N (M element) Like C, N is an element that stabilizes the austenite structure and at the same time contributes to solid solution strengthening. N also has the effect of improving stress corrosion cracking resistance, and for this purpose, in the present invention, it is necessary to contain it in an amount of 0.04% or more. This allows N to stabilize the austenite structure and improve corrosion resistance.
It is also possible to avoid adding a large amount of expensive elements such as i.
一方、Ｎが０．４％を超えるような高Ｎｍは鋳込み鋼塊
中にブローホールによる欠陥を発生させる恐れがあり好
ましくない。したがってＮ含有量は０．０４〜０．４％
と定めた。On the other hand, a high Nm content exceeding 0.4% is undesirable because it may cause defects due to blowholes in the cast steel ingot. Therefore, the N content is 0.04-0.4%
It was determined that
（２）磁気的特性、機械的特性上の特徴：本発明によれ
ば、１０００℃以上、１０５０℃以下の温度で熱間圧延
を行い、次いで１５℃／秒以上の冷却速度で冷却するが
、これは本発明において利用する鋼のような高合金鋼の
熱間圧延に当たっては炭化物等の析出物をマトリクス中
に再固溶させる必要があるために、上記範囲の高温度に
加熱するのである。(2) Features in terms of magnetic properties and mechanical properties: According to the present invention, hot rolling is performed at a temperature of 1000°C or higher and 1050°C or lower, and then cooling is performed at a cooling rate of 15°C/second or higher. This is because when hot rolling a high alloy steel such as the steel used in the present invention, it is necessary to dissolve precipitates such as carbides into the matrix again, so the steel is heated to a high temperature within the above range.
また、そのような高合金鋼ではＭｎ、 Ｃｒ等の炭化物
が析出しやすく、線材を巻取ってから例えば１５℃／秒
以上というように強制冷却を行なわないと、これらの炭
化物の析出が避けられないからである。これらの炭化物
が析出すると延性、冷間加工性および耐食性の低下を招
くのである。In addition, carbides such as Mn and Cr are likely to precipitate in such high alloy steel, and the precipitation of these carbides cannot be avoided unless the wire is forcedly cooled at a rate of 15°C/sec or more after winding. That's because there isn't. Precipitation of these carbides causes a decrease in ductility, cold workability, and corrosion resistance.
このようにして得た熱間圧延線材を冷間伸線し、その冷
間伸線鋼線に対し冷間剪断切断とロールによる冷間圧縮
加工を加える。一連のかかる冷間加工によれば、表面硬
さＨｖ ５００以上とすることができるのであり、しか
もその場合にあっても透磁率は１．０１以下となり、磁
気装置用の非磁性軸として満足する特性を備えている。The hot rolled wire rod thus obtained is cold drawn, and the cold drawn steel wire is subjected to cold shear cutting and cold compression processing using rolls. Through a series of such cold workings, it is possible to obtain a surface hardness of Hv 500 or more, and even in that case, the magnetic permeability is 1.01 or less, which is satisfactory as a non-magnetic shaft for a magnetic device. It has characteristics.
次に、本発明を実施例によってさらに説明する。Next, the present invention will be further explained by examples.
実施例
電気炉でＣ： ０．１０−０．５０％、Ｓｔ ： ０．
６０％以下、 。Example electric furnace: C: 0.10-0.50%, St: 0.
60% or less.
Ｍｎ ： １４〜２０％、Ｎｉ ： ０．３〜２．０％
、Ｃｒ ： １６〜１８％、Ｎ ： ０．０４〜０．４
％を含有し、残部Ｆｅと若干の避けられない不純物から
なる、第１表の実験Ｎ［Ｌ１〜４の化学成分の鋼塊を溶
製した後、■０００″Ｃ以上、１０５０℃以下の温度で
熱間圧延を行い、圧延終了後冷却速度Ｉ５°Ｃ／ｓｅｃ
以上の冷却速度で冷却した直径５．５１１ＩＩ１１の線
材を冷間伸線し直径２．７２ｍ＋ｅの線に伸線した。Mn: 14-20%, Ni: 0.3-2.0%
, Cr: 16-18%, N: 0.04-0.4
After melting a steel ingot with the chemical composition of Experiment N [L1 to 4 in Table 1, which contains % Fe and some unavoidable impurities, Hot rolling was carried out at a cooling rate of I5°C/sec after rolling.
The wire rod having a diameter of 5.511II11 cooled at the above cooling rate was cold drawn into a wire having a diameter of 2.72 m+e.
直径２．７２ｍｍの線を剪断刃で冷間塑性剪断した後ロ
ーラーによる冷間圧縮の塑性加工を施こし、直ｉ蚤２．
６０ｍｍの軸を製作した。A wire with a diameter of 2.72 mm was subjected to cold plastic shearing with a shearing blade, and then subjected to cold compression plastic processing with a roller, and straight flea 2.
I made a 60mm shaft.
このようにして得た本発明に係る軸と従来の軸（第１表
において実験魚５〜１０で示す）とをその磁気特性、表
面硬さおよび耐食性について比較した。The thus obtained shaft according to the present invention and conventional shafts (indicated by experimental fish 5 to 10 in Table 1) were compared in terms of their magnetic properties, surface hardness, and corrosion resistance.
結果は同じく第１表にまとめて示すが耐食性の試験は６
０℃、９５％の恒温恒湿槽内で１００時間浸漬して行い
、試験終了後直径０．５μｍの微少なさびも発生しない
軸は○印を、耐食性が悪くさびやすいものはＸ印をつけ
て示す。The results are also summarized in Table 1, but the corrosion resistance test was 6
The shafts were immersed for 100 hours in a constant temperature and humidity chamber at 0°C and 95%. After the test, shafts with no trace of rust with a diameter of 0.5 μm are marked with an ○, and shafts with poor corrosion resistance and easy to rust are marked with an X. Shown.
従来の軸のうち実験１１ｈ５〜６の軸はさびやす（実際
には使用できなかった。実験阻７〜１０の軸は硬さがＨ
ｖ ４００以下の低さで、透磁率が１．０２以上で要求
する硬さと非磁性の特性をもった軸が得られなかった。Among the conventional shafts, the shafts in experiments 11h5 and 6 were susceptible to rust (they could not actually be used.The shafts in experiments 7 to 10 had a hardness of H).
When v is as low as 400 or less, a shaft with magnetic permeability of 1.02 or more and the required hardness and non-magnetic properties cannot be obtained.
しかしながら、本発明に係る軸（実験ぬ１〜４）は耐食
性がすぐれており、発銹がないぽかりか、表面硬さはＨ
ｖ ５１３〜５３９で耐摺動摩耗性の要求に適する。透
磁率は１ 、００２〜１．００８と非磁性で磁気装置に
使用する非磁性軸として特に通しているのが分かる。However, the shafts according to the present invention (experiments 1 to 4) have excellent corrosion resistance, do not rust, and have a surface hardness of H
v 513-539, suitable for sliding wear resistance requirements. It can be seen that it is non-magnetic, with a magnetic permeability of 1.002 to 1.008, and is especially suitable for use as a non-magnetic shaft used in magnetic devices.
Claims (1)
ｎ：１４〜２０％、Ｎｉ：０．３〜２．０％、Ｃｒ：１
６〜１８％、Ｎ：０．０４〜０．４％、残部Ｆｅおよび
不可避不純物 からなる組成を有する鋼から成り、かつ１０００℃以上
、１０５０℃以下の温度での熱間圧延、該熱間圧延終了
後の１５℃／ｓｅｃ以上の冷却速度での冷却、冷間伸線
、剪断刃による冷間剪断切断、さらにロールによる冷間
圧縮加工を経て得られた、表面硬さＨｖ５００以上およ
び透磁率１．０１以下であることを特徴とする、耐食性
のすぐれた高硬度非磁性軸。[Claims] In weight%, C: 0.10 to 0.50%, Si: 0.60% or less, M
n: 14-20%, Ni: 0.3-2.0%, Cr: 1
6 to 18%, N: 0.04 to 0.4%, balance Fe and unavoidable impurities, and hot rolling at a temperature of 1000°C or higher and 1050°C or lower; After cooling at a cooling rate of 15°C/sec or more, cold wire drawing, cold shear cutting with a shear blade, and cold compression processing with a roll, the surface hardness is Hv500 or more and the magnetic permeability is 1. A high hardness non-magnetic shaft with excellent corrosion resistance, characterized by a hardness of .01 or less.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP25190984A JPS61130459A (en) | 1984-11-30 | 1984-11-30 | High-hardness non-magnetic shaft having superior corrosion resistance |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP25190984A JPS61130459A (en) | 1984-11-30 | 1984-11-30 | High-hardness non-magnetic shaft having superior corrosion resistance |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS61130459A true JPS61130459A (en) | 1986-06-18 |
| JPH0143817B2 JPH0143817B2 (en) | 1989-09-22 |
Family
ID=17229758
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP25190984A Granted JPS61130459A (en) | 1984-11-30 | 1984-11-30 | High-hardness non-magnetic shaft having superior corrosion resistance |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS61130459A (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS63171865A (en) * | 1987-01-09 | 1988-07-15 | Kobe Steel Ltd | Surface hardening method for high-mn nonmagnetic steel materials |
| JPH02267245A (en) * | 1989-04-08 | 1990-11-01 | Kobe Steel Ltd | Wear-resistant and high-strength non-magnetic steel fiber for reinforcing concrete |
| US5882584A (en) * | 1996-04-09 | 1999-03-16 | Sunstar, Inc. | Interdental brush wire and interdental brush |
| JP2014181360A (en) * | 2013-03-18 | 2014-09-29 | Kurimoto Ltd | High-temperature wear-resistant material |
| CN110951957A (en) * | 2019-11-13 | 2020-04-03 | 江阴康瑞成型技术科技有限公司 | Non-magnetic stainless steel bar for low-permeability microelectronic product and production process thereof |
-
1984
- 1984-11-30 JP JP25190984A patent/JPS61130459A/en active Granted
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS63171865A (en) * | 1987-01-09 | 1988-07-15 | Kobe Steel Ltd | Surface hardening method for high-mn nonmagnetic steel materials |
| JPH02267245A (en) * | 1989-04-08 | 1990-11-01 | Kobe Steel Ltd | Wear-resistant and high-strength non-magnetic steel fiber for reinforcing concrete |
| US5882584A (en) * | 1996-04-09 | 1999-03-16 | Sunstar, Inc. | Interdental brush wire and interdental brush |
| JP2014181360A (en) * | 2013-03-18 | 2014-09-29 | Kurimoto Ltd | High-temperature wear-resistant material |
| CN110951957A (en) * | 2019-11-13 | 2020-04-03 | 江阴康瑞成型技术科技有限公司 | Non-magnetic stainless steel bar for low-permeability microelectronic product and production process thereof |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0143817B2 (en) | 1989-09-22 |
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