JPH037191A - Kitchen knife of excellent corrosion resistance - Google Patents
Kitchen knife of excellent corrosion resistanceInfo
- Publication number
- JPH037191A JPH037191A JP14212989A JP14212989A JPH037191A JP H037191 A JPH037191 A JP H037191A JP 14212989 A JP14212989 A JP 14212989A JP 14212989 A JP14212989 A JP 14212989A JP H037191 A JPH037191 A JP H037191A
- Authority
- JP
- Japan
- Prior art keywords
- thickness
- titanium nitride
- titanium
- stainless steel
- corrosion 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.)
- Pending
Links
- 230000007797 corrosion Effects 0.000 title claims abstract description 21
- 238000005260 corrosion Methods 0.000 title claims abstract description 21
- NRTOMJZYCJJWKI-UHFFFAOYSA-N Titanium nitride Chemical compound [Ti]#N NRTOMJZYCJJWKI-UHFFFAOYSA-N 0.000 claims abstract description 29
- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical compound [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 claims abstract description 19
- 239000010936 titanium Substances 0.000 claims abstract description 19
- 229910052719 titanium Inorganic materials 0.000 claims abstract description 19
- 229910001220 stainless steel Inorganic materials 0.000 claims abstract description 18
- 239000010935 stainless steel Substances 0.000 claims abstract description 18
- 239000011247 coating layer Substances 0.000 claims abstract description 11
- 238000010411 cooking Methods 0.000 claims description 12
- 229910052751 metal Inorganic materials 0.000 claims description 5
- 239000002184 metal Substances 0.000 claims description 5
- 239000011248 coating agent Substances 0.000 abstract description 16
- 238000000576 coating method Methods 0.000 abstract description 16
- 239000000463 material Substances 0.000 abstract description 3
- 238000002955 isolation Methods 0.000 abstract 1
- 150000001455 metallic ions Chemical class 0.000 abstract 1
- 230000007547 defect Effects 0.000 description 4
- 230000000694 effects Effects 0.000 description 3
- JEIPFZHSYJVQDO-UHFFFAOYSA-N iron(III) oxide Inorganic materials O=[Fe]O[Fe]=O JEIPFZHSYJVQDO-UHFFFAOYSA-N 0.000 description 3
- 239000010410 layer Substances 0.000 description 3
- 229910021645 metal ion Inorganic materials 0.000 description 3
- 230000003746 surface roughness Effects 0.000 description 3
- 238000003487 electrochemical reaction Methods 0.000 description 2
- 238000010828 elution Methods 0.000 description 2
- 238000005240 physical vapour deposition Methods 0.000 description 2
- 230000015572 biosynthetic process Effects 0.000 description 1
- 239000000919 ceramic Substances 0.000 description 1
- 230000006866 deterioration Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000003628 erosive effect Effects 0.000 description 1
- 150000002500 ions Chemical class 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000005498 polishing Methods 0.000 description 1
- 230000001737 promoting effect Effects 0.000 description 1
- 239000011347 resin Substances 0.000 description 1
- 229920005989 resin Polymers 0.000 description 1
- 150000003839 salts Chemical class 0.000 description 1
- 239000007921 spray Substances 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Landscapes
- Knives (AREA)
Abstract
Description
【発明の詳細な説明】
〈産業上の利用分野〉
本発明は耐食性に優れたｔ二１理用コーティング刃物に
関するものである。DETAILED DESCRIPTION OF THE INVENTION <Industrial Application Field> The present invention relates to a T21 coated cutlery with excellent corrosion resistance.
〈従来の技術〉
従来からステンレスｗ４製刃物の表面に物理痕着法など
により、ｌｕ−前後の膜厚でピンホールなどの欠陥のな
い窒化チタン（ＴｉＮ）膜をコーティングすることによ
り、耐食性の向上を計るとともに、料理用刃物において
は、金属イオンの溶出による料理の味の低下を防ぐ試み
が特開昭６１−１１０７６９号公報等においてなされて
いる。<Conventional technology> Corrosion resistance has been improved by coating the surface of stainless steel W4 cutlery with a titanium nitride (TiN) film with a thickness of around lu-1 and free of defects such as pinholes using physical marking methods. At the same time, attempts have been made in Japanese Patent Laid-Open No. 110769/1983 to prevent deterioration of the taste of dishes due to elution of metal ions in cooking cutlery.
しかし、料理用刃物の表面は通常の研磨仕上げで、表面
粗度Ｒａ５０ｎｌ＋ （ナノメーター）以上と粗く、窒
化チタンの１μｓｎり後の膜Ｊ７では多数のピンホール
が発生するという欠点があった。However, the surface of the cooking cutlery had a conventional polishing finish and was rough with a surface roughness Ra of 50 nl+ (nanometers) or more, and the film J7 of titanium nitride after 1 μsn had the drawback that many pinholes were generated.
窒化チタンのコーテイング膜のピンホール部分において
は、露出したステンレス鋼は電気化学的により責な窒化
チタンとｔＩ触した状態で環境中におかれるため、所謂
ガルバニ−浸食により、コーティングしていないステン
レス鋼単独の刃物より一層激しく腐食される。このため
、料理用刃物においては美観をｍい、金属イオンの溶出
も一層激しく、コーティングによる特性が向上されない
ばかりでなく逆効果となっていた。In the pinhole part of the titanium nitride coating film, the exposed stainless steel is left in the environment in contact with the more sensitive titanium nitride electrochemically, so that so-called galvanic erosion occurs, causing the uncoated stainless steel to deteriorate. It corrodes more severely than a single knife. For this reason, the appearance of cooking cutlery is poor, metal ions are more strongly eluted, and the properties of the coating are not only not improved but also have the opposite effect.
従来、このような場合には窒化チタン膜を厚くしたり、
窒化チタン膜の上から樹脂コーティングをしたりして腐
食を防いでいたが、ｔ４理包丁としての切れ味が十分で
なかった。Conventionally, in such cases, the titanium nitride film was made thicker,
A resin coating was applied over the titanium nitride film to prevent corrosion, but the knife was not sharp enough to be used as a T4 knife.
〈発明が解決しようとする５題〉
本発明は、＠項の問題に対し金属イオンの溶出もなく、
耐食性に優れ、しかも切れ味がよく、黄金色の美観を有
する窒化チタンをコーティングした料理用刃物を提案す
ることを目的とするものである。<Five problems to be solved by the invention> The present invention solves the problem of the @ term without elution of metal ions,
The purpose of the present invention is to provide a titanium nitride-coated cooking cutler that has excellent corrosion resistance, sharpness, and a beautiful golden appearance.
〈課題を解決するための手段〉
本発明は、基地がステンレス鋼で、その表面に厚みが０
．１〜０．５μ−のチタン金属のコーティング層を有し
、さらにその上にコーティング層全体の厚みが１．０−
１．５μ−の範囲になる窒化チタンのコーティング層を
有すること特徴とする耐食性に優れた料理用刃物である
。<Means for Solving the Problems> In the present invention, the base is made of stainless steel and the surface has a thickness of 0.
．． It has a titanium metal coating layer with a thickness of 1 to 0.5μ, and further has a coating layer with a total thickness of 1.0μ.
This cooking knife has excellent corrosion resistance and is characterized by having a coating layer of titanium nitride with a thickness in the range of 1.5μ.
く作用〉
窒化チタンのように耐食性に優れた物質を刃物に、物理
蒸着法（ＰＶＤ）等でコーティングした場合、コーティ
ング時の膜のピンホールなどの欠陥という問題さえなけ
れば耐食性の優れたセラミックで刃物の表面が覆われて
いるため、さびない、しかも切れ味が持続するという理
想的な刃物が得られるはずである。しかし、刃物として
通常の表面ＩＩＩさに加工されたステンレス鋼製料理用
刃物に１．５μ−以下の窒化チタン膜をコーティングし
たのでは膜のピンホールの発生は、さけられなかった。Effect> When a knife is coated with a highly corrosion-resistant material such as titanium nitride using physical vapor deposition (PVD), it will be treated as a highly corrosion-resistant ceramic unless there are defects such as pinholes in the coating. Since the surface of the knife is covered, it should be possible to obtain an ideal knife that does not rust and retains its sharpness. However, when a stainless steel cooking cutler that has been processed to have a normal surface roughness is coated with a titanium nitride film of 1.5 μm or less, the occurrence of pinholes in the film cannot be avoided.
その結果、このピンホールを通して地のステンレスと窒
化チタンが電池作用をし、さびの発生が促進する。As a result, the underlying stainless steel and titanium nitride act as a battery through these pinholes, promoting the formation of rust.
このコーテイング膜中に発生したピンホール部分におけ
る、ステンレス鋼と窒化チタンとの電気化学的反応をお
さえることが出来れば優れた耐食性が得られるはずであ
る。このためには、ステンレス鋼と窒化チタン膜の間に
ステンレス鋼と電位差の小さい金属膜を入れるとよいと
いう発想に基づいて、チタン金属の選定とかつ適切なチ
タン膜厚とコーテイング膜全体の膜厚を見出した。その
結果、コーテイング刃物の耐食性が一段と改善された。If it is possible to suppress the electrochemical reaction between stainless steel and titanium nitride in the pinholes generated in this coating film, excellent corrosion resistance should be obtained. To this end, based on the idea that it is better to insert a metal film with a small potential difference between the stainless steel and the titanium nitride film, it is necessary to select the titanium metal, the appropriate thickness of the titanium film, and the thickness of the entire coating film. I found out. As a result, the corrosion resistance of the coated cutter was further improved.
ところで、通常のコーティングされていない料理用刃物
の表面粗さはＲａ４０〜１５０ｎ−程度が一般的である
が、これにコーティングするチタン膜の膜厚が０．１μ
−未満では刃物表面にチタン膜が均一にコーティングさ
れず、第２層目の窒化チタン膜とステンレス鋼との接触
が起るので、チタン膜は０．１μ蒙以上必要である。し
かし、チタン膜を厚くしすぎると包丁の使用に際し、ス
テンレス地と窒化チタンの密着性や硬さが保てず、切れ
味を保つ耐久性が短かくなるので０．５μｍ以下に限定
される。By the way, the surface roughness of ordinary uncoated cooking cutlery is generally about Ra40 to 150n-, but the thickness of the titanium film coated on it is 0.1μ.
If it is less than -, the titanium film will not be uniformly coated on the surface of the cutter, and the second layer of titanium nitride film will come into contact with the stainless steel, so the titanium film needs to be 0.1 μm thick or more. However, if the titanium film is made too thick, it will not be possible to maintain the adhesion and hardness between the stainless steel base and titanium nitride when using the knife, and the durability to maintain sharpness will be shortened, so it is limited to 0.5 μm or less.
また、コーテイング膜全体の膜厚を１．０μ−より薄く
するとピンホール等の欠陥が大きくなり、ステンレス鋼
と窒化チタン膜との接触が起るので、チタン金属層と窒
化チタン層の合計厚みは１．０μ園以上に限定される。Furthermore, if the thickness of the entire coating film is made thinner than 1.0 μ-, defects such as pinholes become large and contact between the stainless steel and the titanium nitride film occurs, so the total thickness of the titanium metal layer and the titanium nitride layer is Limited to 1.0 μ or more gardens.
またコーテイング膜全体の膜厚が１．５／／ｓ超だと、
刃先のコーテイング膜のダレの丸味が大きくなり、料理
用刃物としての良好な切れ味が得られないので、１．５
μ−以下に限定される。Also, if the thickness of the entire coating film exceeds 1.5//s,
1.5 because the coating film on the edge of the blade becomes more rounded, making it impossible to obtain good sharpness as a cooking knife.
Limited to μ− or less.
〈実施例〉
５ＵＳ４４０＾製の料理用刃物に、イオンブレーティン
グ法により、０．０５〜１．４μ−の膜厚のチタンをし
かる後０，１〜２．０μ−の窒化チタンをコーティング
した。全体の膜厚は第１図のような断面の５０倍写真を
１影して測定し、チタン膜、窒化チタンｌｌ１ｆｆ、比
は窒化チタンコーティング時のＮ、ガス導入時間で！１
ｌｆｌｆｆ＋、た。耐食性は塩水噴１１１Ｘ験を１時間
実施し、さびの発生しなかったものを良好とした。<Example> A cooking cutlery made of 5US440^ was coated with titanium with a thickness of 0.05 to 1.4 .mu.m and then with titanium nitride with a thickness of 0.1 to 2.0 .mu.m by ion blating. The total film thickness is measured by taking a 50x photograph of the cross section as shown in Figure 1 and measuring the titanium film, titanium nitride ll1ff, and the ratio is determined by N during titanium nitride coating and gas introduction time! 1
lflff+, ta. For corrosion resistance, a salt water spray 111X test was conducted for 1 hour, and those with no rust were evaluated as good.
切れ味試験は３ｋｇの荷重を正味の刃当り１００鰭に加
え５往復引き切りにより幅１０ｍ５の新聞紙重ねた束を
切断した。切れ味試験初期において切断枚数が３０枚以
上を初期切れ味良好とし、またこのような試験を１００
回繰り返した時の切断枚数が３０枚以上の場合は切れ味
耐久性良好とした。結果を第１表に示す、試料１〜５は
本発明品で耐食性、切れ味とも良好である。試料Ｎｏ、
６．７．９はチタン膜厚が厚すぎ、耐食性、切れ味耐久
性が不良である。試料Ｎｏ、８は耐食性が良いが全膜厚
が厚すぎ、初期の切れ味が劣る。試料Ｎｏ、 １０はチ
タン膜厚が薄いが、全体の膜厚が厚く、耐食性は良好で
あるが切れ味が不良である。試料Ｎｏ、ｌＩ、１２は全
体の膜厚が本発明の範囲外でＮｏ、１１は薄すぎて耐食
性不良、Ｎｏ。In the sharpness test, a stack of newspapers with a width of 10 m5 was cut by applying a load of 3 kg to 100 fins per net blade and pulling the blade back and forth 5 times. In the initial sharpness test, if the number of sheets cut is 30 or more, the initial sharpness is considered to be good.
If the number of sheets cut when repeated several times was 30 or more, the sharpness durability was considered to be good. The results are shown in Table 1. Samples 1 to 5 are products of the present invention and have good corrosion resistance and sharpness. Sample No.
No. 6.7.9 has too thick titanium film and has poor corrosion resistance and sharpness durability. Sample No. 8 has good corrosion resistance, but the total film thickness is too thick and the initial sharpness is poor. Sample No. 10 has a thin titanium film, but has a large overall film thickness, and has good corrosion resistance but poor sharpness. Samples No., 1I, and 12 have a total film thickness outside the range of the present invention, and No. 11 is too thin, resulting in poor corrosion resistance.
１２は厚すぎて切れ味が不良である。 ｂｔｊｌ Ｎｏ
、１３は全体の膜厚ならびにチタン膜厚とも本発明の範
囲より薄ずぎて耐食性不良である。 ｆｌＫｔ４ Ｎｏ
、１４は本発明のｆ！四囲外チタン膜厚が厚すぎて切れ
味が不良である。No. 12 is too thick and has poor sharpness. btjl No
, No. 13 have poor corrosion resistance because both the overall film thickness and the titanium film thickness are thinner than the range of the present invention. flKt4 No
, 14 is f! of the present invention. The outer titanium film is too thick and the cutting quality is poor.
〈発明の効果〉
本発明により、ステンレス鋼と窒化チタンとの電気化学
的反応をおさえることができ、コーテイング膜にピンホ
ール等の欠陥があっても耐食性にすぐれ、料理用刃物と
して十分な切れ味が得られ、なお、コーティング刃物表
面が窒化チタンに覆われているので黄金色の美観も備え
た料理用刃物が得られた。<Effects of the Invention> According to the present invention, the electrochemical reaction between stainless steel and titanium nitride can be suppressed, and even if the coating film has defects such as pinholes, it has excellent corrosion resistance and has sufficient sharpness as a cooking knife. Furthermore, since the surface of the coated knife was covered with titanium nitride, a cooking knife was obtained which also had a beautiful golden appearance.
第１図は本発明のコーテイング刃物の刃先の断面を示す
図である。
ｌ・・・窒化チタン膜、
２・・・チタン膜、
３・・・素材ステンレス鋼刃物。FIG. 1 is a cross-sectional view of the cutting edge of the coated cutter of the present invention. l...Titanium nitride film, 2...Titanium film, 3...Material stainless steel cutter.
Claims (1)
５μｍのチタン金属のコーティング層を有し、さらにそ
の上にコーティング層全体の厚みが１．０〜１．５μｍ
の範囲になる窒化チタンのコーティング層を有すること
を特徴とする耐食性に優れた料理用刃物。The base is made of stainless steel, and its surface has a thickness of 0.1 to 0.
It has a titanium metal coating layer of 5 μm, and the total thickness of the coating layer is 1.0 to 1.5 μm on top of that.
A cooking cutler with excellent corrosion resistance characterized by having a titanium nitride coating layer having a coating layer of titanium nitride.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP14212989A JPH037191A (en) | 1989-06-06 | 1989-06-06 | Kitchen knife of excellent corrosion resistance |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP14212989A JPH037191A (en) | 1989-06-06 | 1989-06-06 | Kitchen knife of excellent corrosion resistance |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH037191A true JPH037191A (en) | 1991-01-14 |
Family
ID=15308052
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP14212989A Pending JPH037191A (en) | 1989-06-06 | 1989-06-06 | Kitchen knife of excellent corrosion resistance |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH037191A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2417252A (en) * | 2004-08-21 | 2006-02-22 | Harris L G & Co Ltd | Decorating tool head with titianium coating |
| WO2006019469A1 (en) * | 2004-07-19 | 2006-02-23 | Cooper Brands, Inc. | Hand tool with cutting blade having cutting surfaces with wear-enhancing coating thereon |
-
1989
- 1989-06-06 JP JP14212989A patent/JPH037191A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2006019469A1 (en) * | 2004-07-19 | 2006-02-23 | Cooper Brands, Inc. | Hand tool with cutting blade having cutting surfaces with wear-enhancing coating thereon |
| GB2417252A (en) * | 2004-08-21 | 2006-02-22 | Harris L G & Co Ltd | Decorating tool head with titianium coating |
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