JPH07157847A - Material for exterior ornamental parts of clock and exterior ornamental parts for clock - Google Patents
Material for exterior ornamental parts of clock and exterior ornamental parts for clockInfo
- Publication number
- JPH07157847A JPH07157847A JP30838493A JP30838493A JPH07157847A JP H07157847 A JPH07157847 A JP H07157847A JP 30838493 A JP30838493 A JP 30838493A JP 30838493 A JP30838493 A JP 30838493A JP H07157847 A JPH07157847 A JP H07157847A
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- content
- nieq
- manganese
- fcal
- mcal
- Prior art date
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Abstract
Description
【発明の詳細な説明】Detailed Description of the Invention
【０００１】[0001]
【産業上の利用分野】本発明は非磁性で耐食性に優れた
マンガンを含有するオーステナイト鋼を生地とした時計
外装部品用材料及び時計用外装部品に関するものであ
る。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a material for timepiece exterior parts and a timepiece exterior part which are made of austenitic steel containing manganese which is non-magnetic and has excellent corrosion resistance.
【０００２】[0002]
【従来の技術】従来の時計用外装部品には、非磁性で耐
食性に優れた材料として主にニッケル系のオーステナイ
ト系ステンレス鋼が使用されている。しかし、ニッケル
は耐食性、靭性、延性に有効な元素であるが高価であ
る。このために、例えば特開平２−３１００３７号公報
に開示されているように、ニッケルを含有しないフェラ
イト系ステンレス鋼を使用し、それに有機被膜を形成さ
せることが提案されている。しかし、フェライト系ステ
ンレス鋼は非磁性でないことや耐食性などにおいて、時
計用外装部品として使用するにはなお問題があった。2. Description of the Related Art In conventional exterior parts for watches, nickel-based austenitic stainless steel is mainly used as a material which is non-magnetic and has excellent corrosion resistance. However, nickel is an element effective for corrosion resistance, toughness, and ductility, but it is expensive. For this reason, as disclosed in, for example, Japanese Patent Application Laid-Open No. 2-310037, it has been proposed to use nickel-free ferritic stainless steel and form an organic coating on it. However, since ferritic stainless steel is not non-magnetic and has corrosion resistance, there is still a problem in using it as an exterior part for a timepiece.
【０００３】[0003]
【発明が解決しようとする課題】本発明は上記の問題点
を解決するものであって、マンガンを含有するオーステ
ナイト鋼あるいはその微粉末に、選択した成分を含有さ
せることによって、非磁性でかつ耐食性を有し、さらに
加工性、切削性の優れた時計用外装部品材料、および非
磁性で耐食性の優れた時計用外装部品を提供することに
ある。DISCLOSURE OF THE INVENTION The present invention is to solve the above-mentioned problems. By adding a selected component to a manganese-containing austenitic steel or its fine powder, non-magnetic and corrosion-resistant It is an object of the present invention to provide a timepiece exterior component material having excellent workability and machinability and a nonmagnetic and excellent corrosion resistance timepiece exterior component.
【０００４】[0004]
【問題を解決するための手段】本発明者らは、種々の成
分系と熱処理条件の製造実験を行い、該時計用外装部品
として非磁性で優れた耐食性を確保することができるマ
ンガンを含有する成分系と、耐食性および磁気特性につ
いて検討を行った結果、これらの関係について解明し、
安定して良好な製品の製造を可能ならしめるように該成
分の選択によって上記問題が有利に解決できることを見
出だした。[Means for Solving the Problems] The inventors of the present invention conducted a manufacturing experiment using various component systems and heat treatment conditions, and contained manganese as an exterior part for a watch, which was non-magnetic and capable of ensuring excellent corrosion resistance. As a result of investigating the component system, corrosion resistance and magnetic properties, elucidation of these relationships,
It has been found that the above problems can be advantageously solved by the choice of the components so that a stable and good product can be produced.
【０００５】すなわち本発明は重量％で炭素含有量：
０．０１〜０．６％、シリコン含有量：０．０５〜２．
０％、マンガン含有量：９．０〜２０．０％、クロム含
有量：１２．０〜２０．０％、モリブデン含有量：１．
０〜５．０％、銅含有量：０．０５〜４．０％、窒素含
有量：０．１〜０．５％、さらに必要に応じて、硫黄含
有量：０．００５〜０．４％および錫含有量：０．０５
〜２．０％の一種または二種、残部を鉄と不可避不純物
から構成され、下式により求めたフェライト量（Ｆｃａ
ｌ％）およびマルテンサイト量（Ｍｃａｌ％）の指標値
をＦｃａｌ％≦０％、Ｍｃａｌ％≦０％とするクロム−
マンガン系オーステナイト鋼を生地としたことを特徴と
する時計外装部品用材料および時計外装部品である。That is, the present invention has a carbon content in% by weight:
0.01-0.6%, silicon content: 0.05-2.
0%, manganese content: 9.0-20.0%, chromium content: 12.0-20.0%, molybdenum content: 1.
0-5.0%, copper content: 0.05-4.0%, nitrogen content: 0.1-0.5%, and, if necessary, sulfur content: 0.005-0.4 % And tin content: 0.05
.About.2.0% of one or two kinds, and the balance of iron and unavoidable impurities, and the amount of ferrite (Fca
1%) and martensite amount (Mcal%) as index values Fcal% ≦ 0% and Mcal% ≦ 0%
A material for timepiece exterior parts and a timepiece exterior part, which are made of manganese austenitic steel.
【０００６】Ｆｃａｌ％＝１．３８Ｃｒｅｑ−Ｎｉｅｑ
−６ Ｍｃａｌ％＝−０．８２Ｃｒｅｑ−Ｎｉｅｑ＋３３ ここで、Ｃｒｅｑ＝Ｃｒ％＋１．５Ｓｉ％＋Ｍｏ％ Ｎｉｅｑ＝Ｎｉ％＋３０Ｃ％＋３０Ｎ％＋０．５Ｍｎ％
＋０．５Ｃｕ％ なお、本発明における材料とは前記成分から成る非磁性
オーステナイト鋼を溶製して、連続鋳造または造塊した
鋳造品を熱間圧延し、または熱間圧延と冷間圧延した板
状またはコイル状にしたもの、および該オーステナイト
溶鋼を水アトマイズ法またはガスアトマイズ法などによ
り２０μｍ以下の粉末状にしたものを称する。また時計
用外装品は前記粉末から射出成形したものをも含むもの
である。Fcal% = 1.38 Creq-Nieq
-6 Mcal% =-0.82 Creq-Nieq + 33 Here, Creq = Cr% + 1.5Si% + Mo% Nieq = Ni% + 30C% + 30N% + 0.5Mn%
+ 0.5Cu% Note that the material in the present invention is a sheet obtained by hot-rolling a cast product obtained by continuously casting or ingot-making a non-magnetic austenitic steel composed of the above components, or hot-rolling and cold-rolling. Or a coil, and a powder of the austenitic molten steel having a particle size of 20 μm or less by a water atomizing method or a gas atomizing method. Further, the exterior parts for a watch include those produced by injection molding from the above powder.
【０００７】[0007]
【作用】発明者らは、種々の組成のマンガンを含有する
オーステナイト鋼について製造実験を行い、試験片につ
いて人口汗浸漬による腐食試験および磁気特性調査を行
った結果、該時計用外装部品として非磁性で優れた耐食
性を確保することができるニッケルを含有しない鋼が開
発でき、安定して良好な該時計外装用部品の製造を可能
ならしめることができた。The inventors of the present invention conducted a manufacturing experiment on austenitic steels containing manganese having various compositions, and performed a corrosion test on artificial test pieces by immersion in artificial sweat and a magnetic property investigation. It has been possible to develop a nickel-free steel capable of ensuring excellent corrosion resistance, and it has been possible to stably and favorably manufacture the watch exterior part.
【０００８】表１、図１に結果の一例を示す。表１にお
いて、必要な成分調整を行い、フェライト量（Ｆ値）お
よびマルテンサイト量（Ｍ値）が零以下である実施例１
〜５は何れも非磁性を示し、また耐食性（人口汗浸漬試
験結果）も良好であった。しかし、Ｍｎ含有量の低い比
較例６は耐食性は良好であるが、Ｆ値およびＭ値が高
く、非磁性とはならず、時計外装部品用材料としては不
向である。また、Ｆ値、Ｍ値共に低い比較例７は非磁性
であるが、Ｍｏ，Ｃｕが低い成分構成であるため、耐食
性に劣る。比較例８はＣｒ含有量が高くＦ値がプラスと
なっている磁性鋼であり、かつＭｏ，Ｃｕ等が低いので
耐食性も十分ではない。比較例９，１０はいずれも耐食
性は良好であるが、共に磁性を有し時計外層部品として
適していない。図１はＮｉｅｑとＣｒｅｑとの関係でフ
ェライト量（Ｆｃａｌ）と、マルテンサイト量（Ｍｃａ
ｌ）が＜０の領域を示すものであり、この図に表１の試
料をプロットしている。An example of the results is shown in Table 1 and FIG. In Table 1, the necessary components were adjusted, and the amount of ferrite (F value) and the amount of martensite (M value) were zero or less. Example 1
No. 5 to 5 showed non-magnetism, and the corrosion resistance (result of artificial sweat immersion test) was good. However, Comparative Example 6 having a low Mn content has good corrosion resistance, but has a high F value and M value, does not become nonmagnetic, and is unsuitable as a material for watch exterior parts. Further, Comparative Example 7 having a low F value and a low M value is non-magnetic, but has a low composition of Mo and Cu, and thus is inferior in corrosion resistance. Comparative Example 8 is a magnetic steel with a high Cr content and a positive F value, and since Mo, Cu, etc. are low, the corrosion resistance is not sufficient. Comparative Examples 9 and 10 both have good corrosion resistance, but both have magnetism and are not suitable as parts for timepiece outer layers. FIG. 1 shows the relationship between Nieq and Creq and the amount of ferrite (Fcal) and the amount of martensite (Mca).
1) indicates the region of <0, and the samples in Table 1 are plotted in this figure.
【０００９】[0009]
【表１】 [Table 1]
【００１０】このように本発明は、含有する成分を調整
しフェライト≦０％、マルテンサイト≦０％で時計用外
装部品として使用可能な非磁性となり、そして成分とし
ては、重量％で炭素含有量０．０１〜０．６％、シリコ
ン含有量０．０５〜２．０％、マンガン含有量９．０〜
２０．０％、クロム含有量１２．０〜２０．０％、モリ
ブデン含有量１．０〜５．０％、銅含有量０．０５〜
４．０％、窒素含有量０．１〜０．５％、また硫黄含有
量０．００５〜０．４％および錫含有量０．０５〜２．
０％の一種または二種、残部を鉄と不可避不純物から構
成された成分系であり、望ましくは炭素０．０３〜０．
３％、シリコン０．２〜１％、マンガン１１〜１５％、
クロム１３〜１８％、モリブデン１．５〜３．０％、銅
０．１〜３％、窒素０．２〜０．４％、またはさらに硫
黄０．０５〜０．３％および錫０．２〜１．５％の一種
または二種添加されたオーステナイト鋼にすることによ
り切削性が良好で、人口汗に対する耐食性は一般的なニ
ッケルを含有するオーステナイト系ステンレス鋼のＳＵ
Ｓ３０４よりも良好なことがわかった。As described above, according to the present invention, by adjusting the contained components, ferrite ≦ 0% and martensite ≦ 0%, it becomes non-magnetic which can be used as an exterior part for a watch, and as a component, the carbon content is% by weight. 0.01-0.6%, silicon content 0.05-2.0%, manganese content 9.0
20.0%, chromium content 12.0 to 20.0%, molybdenum content 1.0 to 5.0%, copper content 0.05 to
4.0%, nitrogen content 0.1-0.5%, sulfur content 0.005-0.4% and tin content 0.05-2.
It is a component system composed of 0% of one or two kinds and the balance of iron and unavoidable impurities, and preferably contains 0.03 to 0.
3%, silicon 0.2-1%, manganese 11-15%,
Chromium 13-18%, molybdenum 1.5-3.0%, copper 0.1-3%, nitrogen 0.2-0.4%, or even sulfur 0.05-0.3% and tin 0.2. ~ 1.5% of austenite steel with one or two additions provides good machinability and corrosion resistance to artificial sweat is generally nickel-containing austenitic stainless steel SU.
It was found to be better than S304.
【００１１】非磁性の得るためにはニッケルを含有する
オーステナイト系ステンレス鋼のようにオーステナイト
鋼にする必要があるが、そのためには図１に示したよう
に、Ｗｅｌｄ．Ｊ．，５２（１９７３），ｐ２８１に示
されたＷ．Ｔ．ＤｅＬｏｎｇの提案した鋼の成分とフェ
ライト量の関係図を参考にし修正数式化した（１）、
（２）式で示されるフェライト量（Ｆｃａｌ％）および
マルテンサイト量（Ｍｃａｌ）の値を零以下にする必要
がある。以下含有量は全て重量％とする。 Ｆｃａｌ％＝１．３８Ｃｒｅｑ−Ｎｉｅｑ−６・・・・・・・・・（１） Ｍｃａｌ％＝−０．８２Ｃｒｅｑ−Ｎｉｅｑ＋３３・・・・・・・（２） ここで Ｃｒｅｑ＝Ｃｒ％＋１．５Ｓｉ％＋Ｍｏ％ Ｎｉｅｑ＝Ｎｉ％＋３０Ｃ％＋３０Ｎ％＋０．５Ｍｎ％
＋０．５Ｃｕ％ すなわち、ニッケル、炭素、窒素、マンガン、銅はオー
ステナイト安定化元素であり含有量は高い方が良く、ク
ロム、シリコン、モリブデンはフェライト安定元素であ
るため低くした方がよいが、上記成分のうちオーステナ
イト生成元素として、高価なニッケルの代わりに、炭
素、マンガン、窒素、銅を高める必要がある。In order to obtain non-magnetism, it is necessary to use austenitic steel such as nickel-containing austenitic stainless steel. For that purpose, as shown in FIG. J. , 52 (1973), p281. T. A modified mathematical formula was created with reference to the relationship diagram between the composition of steel and the amount of ferrite proposed by DeLong (1),
The values of the amount of ferrite (Fcal%) and the amount of martensite (Mcal) shown by the formula (2) need to be zero or less. All the contents below are% by weight. Fcal% = 1.38Creq-Nieq-6 ... (1) Mcal% =-0.82Creq-Nieq + 33 ... (2) where Creq = Cr% + 1.5Si % + Mo% Nieq = Ni% + 30C% + 30N% + 0.5Mn%
+ 0.5Cu% That is, nickel, carbon, nitrogen, manganese, and copper are austenite stabilizing elements, and the higher the content, the better, while chromium, silicon, and molybdenum are ferrite stabilizing elements, the lower the content, the better. Among the components, carbon, manganese, nitrogen, and copper must be increased instead of expensive nickel as an austenite forming element.
【００１２】以下にこれらの各元素を添加する理由を説
明する。炭素は極めて優れたオーステナイト形成元素で
あり、かつ強度を付与する元素であり、その効果を得る
ために下限を０．０１％とする必要があるが、高い場合
クロム炭化物が生成され、その結果その隣接部にクロム
量が低くなるクロム欠乏層が生成され耐食性が悪くなる
ため上限は０．６％とし、０．０１〜０．６％、望まし
くは０．０３〜０．３％とした。The reason for adding each of these elements will be described below. Carbon is an extremely excellent austenite forming element and an element that imparts strength, and it is necessary to set the lower limit to 0.01% in order to obtain the effect, but when it is high, chromium carbide is generated, and as a result, Since a chromium deficient layer having a low chromium content is generated in the adjacent portion and the corrosion resistance is deteriorated, the upper limit is made 0.6%, 0.01 to 0.6%, preferably 0.03 to 0.3%.
【００１３】窒素は炭素と同様にオーステナイトを極め
て安定化させるとともに加工硬化能と耐食性を付与する
元素であり、その効果を得るために下限を０．１％とす
る必要があるが、高過ぎた場合、窒化物の生成や溶湯か
らの凝固時に過飽和による窒素ガス気泡の生成の問題が
あるため上限を０．５％とし０．１〜０．５％、望まし
くは０．２〜０．４％とした。Nitrogen is an element which, like carbon, extremely stabilizes austenite and imparts work hardening ability and corrosion resistance. To obtain this effect, the lower limit must be 0.1%, but it was too high. In this case, there is a problem of generation of nitrogen gas bubbles due to supersaturation at the time of forming nitrides and solidifying from molten metal, so the upper limit is made 0.5% and 0.1 to 0.5%, preferably 0.2 to 0.4%. And
【００１４】マンガンはオーステナイト鋼の安定化する
ために高い方がよく、その効果を得るために下限を９％
とする必要があるが、マンガン１５％以上ではクロム１
５％以上になると衝撃値や耐食性を低下させるσ相が生
成されるので上限は２０％とし、９〜２０％、望ましく
は１１〜１５％とした。また銅添加はオーステナイト生
成元素であり耐食性も向上し、その効果を得るために下
限は０．０５％必要であるが、高すぎると脆化するので
上限は４％とし、０．０５〜４％、望ましくは０．１〜
３％とした。It is preferable that manganese is high in order to stabilize the austenitic steel, and in order to obtain the effect, the lower limit is 9%.
However, if manganese is 15% or more, chromium 1
When it is 5% or more, a σ phase that reduces the impact value and the corrosion resistance is generated, so the upper limit was made 20%, 9 to 20%, and preferably 11 to 15%. Further, copper addition is an austenite-forming element and also improves corrosion resistance, and the lower limit is required to be 0.05% in order to obtain the effect, but if it is too high, embrittlement occurs, so the upper limit is 4% and 0.05-4%. , Preferably 0.1
It was 3%.
【００１５】一方耐食性の点からクロムは安定な不動態
を保つ最低限として１２％が必要であるが、フェライト
形成元素のため上限は２０％、望ましくは１３〜１８％
とした。モリブデンは不動態を非常に安定化し耐食性を
向上させるため下限を１％とする必要があるが、高すぎ
るとフェライトを生成し非磁性が不安定となるととも
に、σ相が析出し衝撃値や耐食性を低下させる危険性が
あるため、モリブデンの必要十分な量として１〜５％、
望ましくは１．５〜３．０％とした。On the other hand, from the viewpoint of corrosion resistance, chromium needs to be 12% as a minimum for maintaining stable passivation, but the upper limit is 20% because of the ferrite forming element, and preferably 13-18%.
And Molybdenum has a lower limit of 1% in order to stabilize passivation and improve corrosion resistance, but if it is too high, ferrite is generated and the non-magnetism becomes unstable, and the σ phase precipitates and impact value and corrosion resistance As a necessary and sufficient amount of molybdenum is 1 to 5%,
It is preferably set to 1.5 to 3.0%.
【００１６】シリコンは脱酸元素であり、溶鋼の精錬凝
固過程でＣＯガスの発生のないように０．０５以上必要
であるが、フェライト形成元素のため上限は２％とし、
０．０５〜２％、望ましくは０．２〜１％とした。アル
ミニュームは脱酸として０．０２％以下を添加すること
もできる。Silicon is a deoxidizing element and needs to be 0.05 or more so as not to generate CO gas in the refining and solidifying process of molten steel. However, since it is a ferrite forming element, the upper limit is 2%,
It was set to 0.05 to 2%, preferably 0.2 to 1%. Aluminum may be added as deoxidizing in an amount of 0.02% or less.
【００１７】時計用外装部品の製造法としては、一般的
な機械加工成形法や粉末成形法で行われる。特に、精密
な機械仕上げ加工が必要な時計外装用部品において良好
な切削性が要求されるが、切削性が改善される元素の添
加は一般的に加工性を悪くする。しかし、粉末成形法は
圧延や鍛造加工はないので切削性を改善した高硫黄含有
鋼や高錫含有鋼など加工性が悪い成分系においてでも該
問題はなく良好な製品が歩留よく製造できる。この粉末
成形用材料の粒径は細い方が成形後の製品密度が高くな
り良好であるが、該密度を９６％以上にするために、該
平均粒径は２０μｍ以下にする必要がある。As a method of manufacturing the exterior parts for a timepiece, a general mechanical working molding method or a powder molding method is used. In particular, good machinability is required for parts for watch exteriors that require precise mechanical finishing, but addition of an element that improves machinability generally deteriorates machinability. However, since the powder molding method does not involve rolling or forging, a good product can be produced with good yield without such problems even in a composition system having poor machinability such as high-sulfur content steel or high-tin content steel with improved machinability. The smaller the particle size of this powder molding material is, the higher the product density after molding is, which is preferable. However, in order to make the density 96% or more, the average particle size needs to be 20 μm or less.
【００１８】ここで、硫黄を０．００５〜０．４％およ
び錫含有量０．０５〜２．０％、望ましくは硫黄０．０
５〜０．３％および錫０．２〜１．５％の一種または二
種を添加することによって、切削性が大きく改良され
た。しかし、硫黄または錫の添加は鋼の靭性など機械的
性質を悪くするため上記範囲を超える添加はよくない。Here, 0.005 to 0.4% of sulfur and 0.05 to 2.0% of tin content, preferably 0.0 of sulfur
The machinability was greatly improved by adding one or two of 5 to 0.3% and tin of 0.2 to 1.5%. However, the addition of sulfur or tin deteriorates the mechanical properties such as toughness of steel, so addition in excess of the above range is not good.
【００１９】かくして、前記問題点が解決され、優れた
耐食性のある非磁性のマンガンを含有するオーステナイ
ト鋼あるいは該粉末からなる時計外装部品用材料および
これらの材料を加工、成形して得られる時計用外装部
品、射出成形部品が安定して製造することが可能になっ
た。Thus, the aforesaid problems are solved, and austenitic steel containing non-magnetic manganese having excellent corrosion resistance or materials for watch exterior parts made of the powder, and for timepieces obtained by processing and molding these materials. It has become possible to stably manufacture exterior parts and injection molded parts.
【００２０】[0020]
〔実施例１〕重量％で炭素含有量０．１２％、シリコン
含有量０．２４％、マンガン含有量１３．５％、クロム
含有量１６．４％、モリブデン含有量１．８％、窒素含
有量０．３０％、銅含有量１．６０％、硫黄含有量０．
００８％、残部を鉄と不可避不純物から構成され、フェ
ライト量＜０％となった成分の溶鋼をＡＯＤ炉で溶製し
た。ニッケルは不純物として０．０７％であった。その
溶鋼を造塊した鋼塊から、鍛造と熱間圧延によって製造
された熱延鋼板から時計ケース、バンド裏蓋部品を制作
し、常温と５０℃の人口汗に２０〜４８時間浸漬し腐食
および変色の発生を調査した結果、オーステナイト系ス
テンレス鋼のＳＵＳ３０４Ｌより良好でＳＵＳ３１６Ｌ
並であり、透磁率計による磁気特性調査結果、非磁性で
あり、時計用外装部品材として十分使用可能なことがわ
かった。[Example 1] Carbon content 0.12% by weight, silicon content 0.24%, manganese content 13.5%, chromium content 16.4%, molybdenum content 1.8%, nitrogen content Content 0.30%, copper content 1.60%, sulfur content 0.
Molten steel composed of 008% and the balance iron and unavoidable impurities and having a ferrite content of <0% was melted in an AOD furnace. Nickel was 0.07% as an impurity. A watch case and a band back cover component are produced from a hot-rolled steel plate produced by forging and hot rolling from the steel ingot in which the molten steel is ingot, and are immersed in artificial sweat at room temperature and 50 ° C for 20 to 48 hours to cause corrosion and corrosion. As a result of investigating the occurrence of discoloration, it is better than SUS304L of austenitic stainless steel and SUS316L
As a result, it was found that it was non-magnetic and could be sufficiently used as a material for exterior parts for timepieces.
【００２１】〔実施例２〕重量％で炭素含有量０．１６
％、シリコン含有量０．３２％、マンガン含有量１４．
１％、クロム含有量１７．２％、モリブデン含有量２．
４％、銅２．２％、窒素含有量０．３２％、さらに切削
性を良くするために硫黄含有量０．２３％添加し、残部
を鉄と不可避不純物から構成されるフェライト量＜０％
となったマンガン系オーステナイト溶鋼を溶製し、その
注入流に１５００kg／cm2 の高圧水アトマイズにより噴
霧急冷し、平均粒径６μｍの微粉末を製造した後、射出
成形法によって時計用バンド部品を製造した。時計ケー
ス、バンド裏蓋部品を製作し、常温と５０℃の人口汗に
２０〜４８時間浸漬し腐食および変色の発生を調査した
結果、オーステナイト系ステンレス鋼のＳＵＳ３１６Ｌ
並であり、非磁性部品の製造ができた。Example 2 Carbon content of 0.16% by weight
%, Silicon content 0.32%, manganese content 14.
1%, chromium content 17.2%, molybdenum content 2.
4%, copper 2.2%, nitrogen content 0.32%, and sulfur content 0.23% to improve machinability, the balance being iron and unavoidable impurities <0%
Smelted manganese austenitic steel melt became, spray quenched by high-pressure water atomizing of 1500 kg / cm 2 to the injection flow, after producing a fine powder of an average particle diameter of 6 [mu] m, the watch band components by injection molding Manufactured. As a result of making watch case and band back cover parts, immersing them in artificial sweat at room temperature and 50 ° C for 20 to 48 hours and examining the occurrence of corrosion and discoloration, austenitic stainless steel SUS316L
It was normal, and non-magnetic parts could be manufactured.
【００２２】〔実施例３〕重量％で炭素含有量０．０９
％、シリコン含有量０．３５％、マンガン含有量１４．
５％、クロム含有量１５．３％、モリブデン含有量２．
１％、窒素含有量０．３２％、銅含有量０．１５％、硫
黄含有量０．３１％、残部を鉄と不可避不純物から構成
されるフェライト量が０％以下のマンガン−クロム系オ
ーステナイト溶鋼を溶製し、１５００kg／cm2 高圧水に
より平均粒径６μｍの微粉末を製造した後、射出成形法
によって時計用バンド部品を製造した。その部品を常温
と５０℃の人口汗に２０〜４８時間浸漬し腐食および変
色の発生を調査した結果、オーステナイト系ステンレス
鋼のＳＵＳ３１６Ｌ並であり、非磁性部品の製造ができ
た。Example 3 Carbon content of 0.09% by weight
%, Silicon content 0.35%, manganese content 14.
5%, chromium content 15.3%, molybdenum content 2.
1%, Nitrogen content 0.32%, Copper content 0.15%, Sulfur content 0.31%, Manganese-chromium austenitic molten steel with a balance of 0% or less of ferrite composed of iron and unavoidable impurities. Was melted to produce fine powder having an average particle size of 6 μm with 1500 kg / cm 2 high pressure water, and then a watch band component was manufactured by an injection molding method. As a result of immersing the part in artificial sweat at room temperature and 50 ° C. for 20 to 48 hours and investigating the occurrence of corrosion and discoloration, it was possible to manufacture a non-magnetic part, which is comparable to SUS316L of austenitic stainless steel.
【００２３】その他、実施例４では錫含有量を１．１
％、実施例５では硫黄含有量０．２３％および錫含有量
０．６％添加した場合について、実施例３と同じ方法で
時計外装用部品を製造した結果、実施例３と同様の結果
が得られた。また、比較例６〜１０はＦｃａｌ％及び／
又はＭｃａｌ％の値が正の値となった場合で図１に×印
しで示したように非磁性とならなかったものであり、比
較例７と８はＭｏ＜１．０％，Ｃｕ＜０．０５％であっ
て本発明の範囲外であり、耐食性が不良となった例であ
る。In addition, in Example 4, the tin content is 1.1.
%, In Example 5, when the sulfur content of 0.23% and the tin content of 0.6% were added, the result of producing the timepiece exterior component by the same method as in Example 3 was the same as that of Example 3. Was obtained. Further, Comparative Examples 6 to 10 have Fcal% and / or
Alternatively, when the value of Mcal% was a positive value, it did not become non-magnetic as shown by the mark X in FIG. 1, and Comparative Examples 7 and 8 were Mo <1.0%, Cu < This is an example of 0.05%, which is outside the range of the present invention, and the corrosion resistance is poor.
【００２４】[0024]
【発明の効果】この発明によって製造される時計外装用
材料およびその部品や腕時計はマンガンを含有するオー
ステナイト鋼であり、非磁性で耐食性、被削性に優れ、
アレルギー感作性を保持する人物でも皮膚炎およびかぶ
れを起こすことがなくなる効果を発揮する。Industrial Applicability The timepiece exterior material, parts thereof and wristwatches produced by the present invention are austenitic steels containing manganese, and are non-magnetic, excellent in corrosion resistance and machinability.
Even people who have allergic sensitization will have the effect of preventing dermatitis and rash.
【図１】ＮｉｅｑとＣｒｅｑとの関係でＦｃａｌ＜０、
Ｍｃａｌ＜０となる領域を示す図である。FIG. 1 is a relation between Nieq and Creq, Fcal <0,
It is a figure which shows the area | region which becomes Mcal <0.
───────────────────────────────────────────────────── フロントページの続き (72)発明者 平居 正純 東京都千代田区大手町１−６−１ 大平洋 金属株式会社内 ─────────────────────────────────────────────────── ─── Continued Front Page (72) Inventor Masazumi Hirai 1-6-1 Otemachi, Chiyoda-ku, Tokyo Hiroshi Ohira Metals Co., Ltd.
Claims (5)
たフェライト量（Ｆｃａｌ％）≦０％、マルテンサイト
量（Ｍｃａｌ％）≦０％とするクロム−マンガン系オー
ステナイト鋼を生地としたことを特徴とする時計外装部
品用材料。 Ｆｃａｌ％＝１．３８Ｃｒｅｑ−Ｎｉｅｑ−６ Ｍｃａｌ％＝−０．８２Ｃｒｅｑ−Ｎｉｅｑ＋３３ ここで、Ｃｒｅｑ＝Ｃｒ％＋１．５Ｓｉ％＋Ｍｏ％ Ｎｉｅｑ＝Ｎｉ％＋３０Ｃ％＋３０Ｎ％＋０．５Ｍｎ％
＋０．５Ｃｕ％1. By weight%, carbon content: 0.01 to 0.6%, silicon content: 0.05 to 2.0%, manganese content: 9.0 to 20.0%, chromium content 12.0 to 20.0%, molybdenum content: 1.0 to 5.0%, copper content: 0.05 to 4.0%, nitrogen content: 0.1 to 0.5% A chrome-manganese austenitic steel having a ferrite content (Fcal%) ≦ 0% and a martensite content (Mcal%) ≦ 0%, which is composed of iron and unavoidable impurities, is used as a material. Materials for watch exterior parts. Fcal% = 1.38Creq-Nieq-6 Mcal% =-0.82Creq-Nieq + 33 Here, Creq = Cr% + 1.5Si% + Mo% Nieq = Ni% + 30C% + 30N% + 0.5Mn%
+ 0.5Cu%
たフェライト量（Ｆｃａｌ％）≦０％、マルテンサイト
量（Ｍｃａｌ％）≦０％とするクロム−マンガン系オー
ステナイト鋼を生地としたことを特徴とする時計外装部
品用材料。 Ｆｃａｌ％＝１．３８Ｃｒｅｑ−Ｎｉｅｑ−６ Ｍｃａｌ％＝−０．８２Ｃｒｅｑ−Ｎｉｅｑ＋３３ ここで、Ｃｒｅｑ＝Ｃｒ％＋１．５Ｓｉ％＋Ｍｏ％ Ｎｉｅｑ＝Ｎｉ％＋３０Ｃ％＋３０Ｎ％＋０．５Ｍｎ％
＋０．５Ｃｕ％2. By weight%, carbon content: 0.01 to 0.6%, silicon content: 0.05 to 2.0%, manganese content: 9.0 to 20.0%, chromium content 12.0 to 20.0%, molybdenum content: 1.0 to 5.0%, copper content: 0.05 to 4.0%, nitrogen content: 0.1 to 0.5%, and Sulfur content: 0.005-0.4% and tin content: 0.05-2.0%, one or two, the balance being composed of iron and unavoidable impurities, and the ferrite content (Fcal %) ≤ 0%, martensite content (Mcal%) ≤ 0%, and a material for watch exterior parts, characterized by using a chrome-manganese austenitic steel as a material. Fcal% = 1.38Creq-Nieq-6 Mcal% =-0.82Creq-Nieq + 33 Here, Creq = Cr% + 1.5Si% + Mo% Nieq = Ni% + 30C% + 30N% + 0.5Mn%
+ 0.5Cu%
ロム−マンガン系オーステナイト鋼を生地としたことを
特徴とする時計外装部品。3. A timepiece exterior component using a chromium-manganese austenitic steel having the composition according to claim 1 or 2 as a cloth.
るオーステナイト鋼の溶湯より平均粒径が２０μｍ以下
の微粉末にしたことを特徴とする時計外装部品成形用微
粉末材料。4. A fine powder material for molding a watch exterior part, characterized in that a fine powder having an average particle diameter of 20 μm or less is formed from the molten austenitic steel having the chemical composition according to claim 1 or 2.
製造されたことを特徴とする時計用外装部品。5. A timepiece exterior component manufactured by injection molding from the fine powder according to claim 4.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP30838493A JP3486936B2 (en) | 1993-12-08 | 1993-12-08 | Material for watch exterior parts and watch exterior parts |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP30838493A JP3486936B2 (en) | 1993-12-08 | 1993-12-08 | Material for watch exterior parts and watch exterior parts |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH07157847A true JPH07157847A (en) | 1995-06-20 |
| JP3486936B2 JP3486936B2 (en) | 2004-01-13 |
Family
ID=17980424
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP30838493A Expired - Fee Related JP3486936B2 (en) | 1993-12-08 | 1993-12-08 | Material for watch exterior parts and watch exterior parts |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3486936B2 (en) |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH1192885A (en) * | 1997-07-29 | 1999-04-06 | Union Sider Nord Est Fr <Usinor> | Austenitic stainless steel with extremely low nickel content |
| US6682581B1 (en) | 1999-05-26 | 2004-01-27 | Basf Aktiengesellschaft | Nickel-poor austenitic steel |
| US20160124391A1 (en) * | 2013-06-12 | 2016-05-05 | Nivarox-Far S.A. | Component for a timepiece movement |
| JP2017061741A (en) * | 2015-09-25 | 2017-03-30 | ザ・スウォッチ・グループ・リサーチ・アンド・ディベロップメント・リミテッド | Nickel-free austenitic stainless steel |
| EP3176653A1 (en) * | 2015-12-03 | 2017-06-07 | Cartier International AG | Clock component having a magnetic shielding function and comprising a steel alloy |
| CN111492081A (en) * | 2017-12-20 | 2020-08-04 | 株式会社Posco | Non-magnetic austenitic stainless steel with improved strength and surface conductivity |
| EP3739076A1 (en) * | 2019-05-16 | 2020-11-18 | The Swatch Group Research and Development Ltd | Austenitic stainless steel nickel-free powder composition and part manufactured by sintering by means of said powder |
| CN112779477A (en) * | 2019-11-11 | 2021-05-11 | 精工爱普生株式会社 | Timepiece component and timepiece |
-
1993
- 1993-12-08 JP JP30838493A patent/JP3486936B2/en not_active Expired - Fee Related
Cited By (15)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH1192885A (en) * | 1997-07-29 | 1999-04-06 | Union Sider Nord Est Fr <Usinor> | Austenitic stainless steel with extremely low nickel content |
| US6682581B1 (en) | 1999-05-26 | 2004-01-27 | Basf Aktiengesellschaft | Nickel-poor austenitic steel |
| US20160124391A1 (en) * | 2013-06-12 | 2016-05-05 | Nivarox-Far S.A. | Component for a timepiece movement |
| US11079722B2 (en) * | 2013-06-12 | 2021-08-03 | Nivarox-Far S.A. | Component for a timepiece movement |
| JP2017061741A (en) * | 2015-09-25 | 2017-03-30 | ザ・スウォッチ・グループ・リサーチ・アンド・ディベロップメント・リミテッド | Nickel-free austenitic stainless steel |
| EP3176653A1 (en) * | 2015-12-03 | 2017-06-07 | Cartier International AG | Clock component having a magnetic shielding function and comprising a steel alloy |
| EP3705595A4 (en) * | 2017-12-20 | 2020-09-09 | Posco | Non-magnetic austenitic stainless steel having improved strength and surface conductivity |
| CN111492081A (en) * | 2017-12-20 | 2020-08-04 | 株式会社Posco | Non-magnetic austenitic stainless steel with improved strength and surface conductivity |
| CN111492081B (en) * | 2017-12-20 | 2021-11-19 | 株式会社Posco | Non-magnetic austenitic stainless steel with improved strength and surface conductivity |
| EP3739076A1 (en) * | 2019-05-16 | 2020-11-18 | The Swatch Group Research and Development Ltd | Austenitic stainless steel nickel-free powder composition and part manufactured by sintering by means of said powder |
| WO2020229325A1 (en) * | 2019-05-16 | 2020-11-19 | The Swatch Group Research And Development Ltd | Austenitic stainless steel powder composition without nickel and part made by sintering by means of said powder |
| CN113811631A (en) * | 2019-05-16 | 2021-12-17 | 斯沃奇集团研究和开发有限公司 | Nickel-free austenitic stainless steel powder composition and parts produced by sintering said powder |
| CN113811631B (en) * | 2019-05-16 | 2022-11-04 | 斯沃奇集团研究和开发有限公司 | Nickel-free austenitic stainless steel powder composition and parts produced by sintering said powder |
| CN112779477A (en) * | 2019-11-11 | 2021-05-11 | 精工爱普生株式会社 | Timepiece component and timepiece |
| CN112779477B (en) * | 2019-11-11 | 2023-09-29 | 精工爱普生株式会社 | Timepiece component and timepiece |
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