JP2584552B2 - Surface treatment method for titanium cookware - Google Patents
Surface treatment method for titanium cookwareInfo
- Publication number
- JP2584552B2 JP2584552B2 JP3159122A JP15912291A JP2584552B2 JP 2584552 B2 JP2584552 B2 JP 2584552B2 JP 3159122 A JP3159122 A JP 3159122A JP 15912291 A JP15912291 A JP 15912291A JP 2584552 B2 JP2584552 B2 JP 2584552B2
- Authority
- JP
- Japan
- Prior art keywords
- titanium
- gas
- heat treatment
- treatment method
- atmosphere
- 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
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- Solid-Phase Diffusion Into Metallic Material Surfaces (AREA)
- Cookers (AREA)
Description
【０００１】[0001]
【産業上の利用分野】この発明はチタン製の中華なべや
フライパン等の加熱料理器具の表面処理方法に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for treating the surface of a cooker such as a titanium wok or a frying pan made of titanium.
【０００２】[0002]
【従来技術及び発明が解決しようとする課題】中華なべ
やフライパンなどの加熱料理器具は多くの場合、その表
面に黒色硬化処理が施されている。これは黒色化により
熱吸収効率を改善し、また表面硬化により調理器具との
接触によるキズの発生を防止するためである。2. Description of the Related Art In many cases, cooked cooking utensils such as woks and pans are subjected to a black curing treatment on their surfaces. This is to improve the heat absorption efficiency by blackening and to prevent scratches due to contact with the cooking utensil by surface hardening.
【０００３】ところで、チタンは優れた耐食性と軽量性
を有しており、このような特性を生かして、チタンを加
熱料理器具へ応用をする試みが現在なされている。[0003] Incidentally, titanium has excellent corrosion resistance and light weight, and attempts are currently being made to apply titanium to heated cooking utensils by utilizing such characteristics.
【０００４】しかしながら、上記目的でチタン表面に黒
色硬化処理を施しても、チタン表面に黒色硬化層を形成
することは困難であり、以下に述べるように、これまで
に考案されている方法を用いても硬化層形成には不十分
である。[0004] However, it is difficult to form a black cured layer on the titanium surface even if the titanium surface is subjected to a black curing treatment for the above-mentioned purpose, and as described below, a method which has been devised so far is used. However, it is insufficient for forming a cured layer.
【０００５】チタン表面を黒色化させる方法は化成処理
による方法が一般的であり、例えば特許公報昭６２−２
６００７０号がある。しかし、この化成処理による表面
黒色層は母相との密着性が不十分である。The method of blackening the titanium surface is generally a chemical conversion method.
No. 60070. However, the surface black layer formed by the chemical conversion treatment has insufficient adhesion to the mother phase.
【０００６】密着性を改善する方法として、化成処理後
加熱処理を行う方法（例えば特許公報平１−１２３０８
２号、平１−１２７６８１号）が考案されている。しか
し、これらの方法を採用した場合でも超音波洗浄後に表
面黒色層を残存させるのが精一杯であった。As a method of improving the adhesion, a method of performing a heat treatment after a chemical conversion treatment (for example, Japanese Patent Application Laid-Open No. 1-13083).
No. 2, Hei 1-127681) has been devised. However, even when these methods are employed, it has been the best to leave the surface black layer after the ultrasonic cleaning.
【０００７】一方、チタン表面を硬化させる他の方法と
しては、イオンプレーティングによるＴｉＮコーティン
グや表面酸化による硬化（例えば特許公報昭６２−２５
６９５６号）等がある。On the other hand, other methods for hardening the titanium surface include TiN coating by ion plating and hardening by surface oxidation (for example, Japanese Patent Laid-Open No. 62-25 / 1987).
No. 6956).
【０００８】しかし、ＴｉＮイオンプレーティングは処
理費用が高価であるという欠点を有し、得られる表面も
金色を呈し、黒色とはほどとおい。[0008] However, TiN ion plating has a disadvantage that the processing cost is expensive, and the obtained surface also has a golden color, which is not so black.
【０００９】表面酸化による硬化では酸素雰囲気で加熱
するのみで十分であり、簡便に表面硬化層が得られる。
しかし、最表層には白色でかつ、剥離性のスケール層を
生じてしまい、黒色度、表面安定性の面で問題がある。For curing by surface oxidation, heating in an oxygen atmosphere is sufficient, and a surface hardened layer can be easily obtained.
However, a white and peelable scale layer is formed on the outermost layer, and there is a problem in blackness and surface stability.
【００１０】この発明はかかる事情に鑑みてなされたも
のであって、黒色でかつ十分な安定性をもつ表面硬化層
を安価に形成することができるチタン製加熱料理器具の
表面処理方法を提供することを目的とする。The present invention has been made in view of the above circumstances, and provides a surface treatment method for a titanium heating cookware capable of forming a surface hardened layer which is black and has sufficient stability at low cost. The purpose is to:
【００１１】[0011]
【課題を解決するための手段及び作用】この発明は、上
記課題を解決するために、チタン製加熱料理器具をＣＯ
2 ガスを含む雰囲気で加熱処理し、チタン材表面でＣＯ
2 が還元されて生成した酸素と炭素とをチタン表面から
内部に拡散させ、表面を黒色化することを特徴とするチ
タン製加熱料理器具の表面処理方法を提供する。SUMMARY OF THE INVENTION In order to solve the above-mentioned problems, the present invention relates to a cooking device made of titanium and made of CO.
2 Heat treatment in an atmosphere containing gas
Oxygen and carbon generated by reduction of 2 are removed from the titanium surface
Provided is a method for treating a surface of a cooked titanium cookware, characterized in that the cookware is made to diffuse inside and blacken the surface.
【００１２】この雰囲気中のＣＯ2 ガスはチタン表面で
還元されＣＯ，Ｃ，Ｏとなる。このため、チタン表面層
よりＣ，Ｏの両元素が内部に向って高濃度に拡散し、
Ｃ，Ｏの両元素が固溶した強固な硬化層が形成されるこ
ととなる。そしてこのＣ，Ｏの両元素が固溶した表面硬
化層は黒色を示し、かつ十分な安定性を有している。ま
た、ＣＯ2 ガスを含む雰囲気で加熱処理するだけである
から、極めて安価に黒色処理を行うことができる。The CO 2 gas in this atmosphere is reduced on the titanium surface to CO, C, O. For this reason, both elements of C and O diffuse inward from the titanium surface layer to a high concentration,
A strong hardened layer in which both elements of C and O form a solid solution is formed. The hardened surface layer in which both elements of C and O form a solid solution shows black color and has sufficient stability. Further, since only the heat treatment is performed in an atmosphere containing CO 2 gas, the black treatment can be performed at very low cost.
【００１３】この場合に、加熱処理雰囲気は、ＣＯ2 ガ
スと、Ａｒ，Ｈｅ及びＮ2 のうちの１種以上を含むガス
との混合ガス雰囲気であることが好ましい。Ａｒ，Ｈ
ｅ，Ｎ2 等のガスはＣＯ2 ガスを希釈し、チタンによる
ＣＯ2 の還元により生じたＯによる過剰酸化を防止す
る。従って、このような過剰酸化防止の観点からはＣＯ
2 ガス分圧が１／２以下であることが好ましい。ＣＯ2
ガス分圧が１／２を超える場合には表面にスケールを生
じやすく白色化し、この白色層が剥離しやすく、表面の
安定性に欠ける。In this case, the heat treatment atmosphere is preferably a mixed gas atmosphere of a CO 2 gas and a gas containing at least one of Ar, He and N 2 . Ar, H
Gases such as e and N 2 dilute the CO 2 gas and prevent excessive oxidation by O generated by reduction of CO 2 by titanium. Therefore, from the viewpoint of preventing such excessive oxidation, CO 2
The partial pressure of the two gases is preferably 1/2 or less. CO 2
If the gas partial pressure exceeds ２, the surface tends to be scaled and whitened, the white layer is easily peeled off, and the surface lacks stability.
【００１４】また加熱処理温度は６５０℃以上であるこ
とが好ましい。これは６５０℃以下の場合、ＣＯ2 ガス
のチタン表面での還元が十分起こらず、したがって表面
黒色化が不十分になる虞があるからである。The heat treatment temperature is preferably 650 ° C. or higher. This is because, when the temperature is 650 ° C. or lower, the reduction of the CO 2 gas on the titanium surface does not sufficiently occur, and therefore, the surface blackening may be insufficient.
【００１５】なお、ここでいうチタンは、純チタン及び
チタン合金の両方を含むことを意図するものである。[0015] The term titanium as used herein is intended to include both pure titanium and titanium alloys.
【００１６】[0016]
【実施例】以下、この発明の実施例について詳細に説明
する。Embodiments of the present invention will be described below in detail.
【００１７】板厚１ｍｍのＣＰ２種チタン板を用い、内
径２５０ｍｍの中華なべを製作し、表面黒色化処理を施
した。この場合の加熱処理は、表１、表２に示す種々の
雰囲気で行った。A wok of 250 mm in inner diameter was manufactured using a 1 mm thick CP2 type titanium plate, and the surface was blackened. The heat treatment in this case was performed in various atmospheres shown in Tables 1 and 2.
【００１８】表１は空気組成のガス中に分圧が１／１２
及び１／２のＣＯ2を添加した実施例と、添加しなかっ
た比較例とについて、５００〜９５０℃で加熱処理を行
い、明度測定を行った結果を示したものである。なお、
明度の欄は、実施例については、スケ−ルの発生がなく
表面黒色化されている領域の表面明度を示す。Table 1 shows that the partial pressure in a gas having an air composition is 1/12.
FIG. 4 shows the results obtained by performing a heat treatment at 500 to 950 ° C. and measuring the lightness of Examples in which CO 2 was added and 1/2 of CO 2 and Comparative Examples in which CO 2 was not added. In addition,
The lightness column shows the surface lightness of an area where no scale is generated and the surface is blackened in the embodiment.
【００１９】[0019]
【表１】 [Table 1]
【００２０】表１から明らかなように、実施例の場合に
は表面明度が小さく、充分に黒色化されていることが確
認された。これに対して比較例の場合は全面にスケ−ル
が形成されており、明度が高く、黒色化が不充分である
ことが確認された。すなわち、ＣＯ2 ガスを含む雰囲気
で加熱処理することにより、黒色度を高めることができ
ることが確認された。As is clear from Table 1, in the case of the example, it was confirmed that the surface lightness was small and the surface was sufficiently blackened. On the other hand, in the case of the comparative example, the scale was formed on the entire surface, and it was confirmed that the brightness was high and the blackening was insufficient. That is, it was confirmed that the blackness can be increased by performing the heat treatment in an atmosphere containing a CO 2 gas.
【００２１】表２は、ガスとしてＣＯ2 ，Ｏ2 ，Ａｒ，
Ｈｅ，Ｎ2 を、単独又は混合ガスとして用い、ＣＯ2 ガ
ス分圧を１〜１／１０と変化させ、加熱処理温度を５０
０℃〜９５０℃の範囲に設定して加熱処理を行い、表面
黒色化処理の評価を行った結果を示すものである。表面
黒色化処理の評価は明度計による表面明度の測定と、内
容量５００ｇの野菜いためを５０回行った後の表面安定
性（表面キズの発生や表面ムラの発生の有無）を目視で
判定して行い、さらにスケ−ルの有無を調べることによ
って行った。なお、明度の欄はいちばん明度が高い領域
を測定した結果を示すものである。また、スケ−ル発生
の欄は○が発生しなかったもの、×が発生したものを示
す。Table 2 shows that CO 2 , O 2 , Ar,
He or N 2 is used alone or as a mixed gas, the CO 2 gas partial pressure is changed from 1 to 1/10, and the heat treatment temperature is 50
It shows the results of evaluating the surface blackening treatment by performing a heat treatment at a temperature set in the range of 0 ° C. to 950 ° C. The evaluation of the surface blackening treatment was carried out by measuring the surface lightness with a lightness meter and visually determining the surface stability (whether or not surface scratches or surface unevenness had occurred) after performing 50 times of vegetable pickling with a content of 500 g. The test was performed by checking the presence or absence of the scale. The column of lightness shows the result of measurement of the region with the highest lightness. In the column of scale occurrence, those in which ○ did not occur and those in which x did occur are shown.
【００２２】[0022]
【表２】 [Table 2]
【００２３】この表２に示すように、ＣＯ2 ガスを含む
雰囲気中で行ったものの中では、Ａｒ，Ｈｅ及びＮ2 の
うちの１種以上を用い、ＣＯ2 ガス分圧が１／２以下で
あり、処理温度が６５０℃以上のものが特に良好な値と
なったことが確認された。すなわち、本発明により黒色
度及び表面安定性に優れた表面処理を施すことが可能で
ある。As shown in Table 2, among those performed in an atmosphere containing CO 2 gas, one or more of Ar, He and N 2 were used, and the partial pressure of CO 2 gas was 以下 or less. It was confirmed that those having a processing temperature of 650 ° C. or higher had particularly good values. That is, according to the present invention, it is possible to perform a surface treatment excellent in blackness and surface stability.
【００２４】なお、実施例では例として中華なべの例を
示したが、本発明がフライパン等他のチタン製加熱料理
器具に適用可能なことはもちろんである。また、実施例
では例としてＣＰ２種チタン製中華なべの例を示した
が、素材としてＣＰ２種チタンの他の各種チタン、チタ
ン合金に適用可能であることも言うまでもない。In the embodiment, the example of a wok is shown as an example, but it is needless to say that the present invention is applicable to other cooked titanium cookware such as a frying pan. Further, in the embodiment, an example of a wok made of CP2 type titanium is shown as an example, but it goes without saying that the present invention is applicable to various other titanium and titanium alloys as a material.
【００２５】[0025]
【発明の効果】この発明によれば、黒色でかつ十分な安
定性をもつ表面硬化層を安価に形成することができるチ
タン製加熱料理器具の表面処理方法を提供することがで
きる。According to the present invention, it is possible to provide a surface treatment method for a titanium cookware in which a hardened black surface layer having sufficient stability can be formed at low cost.
───────────────────────────────────────────────────── フロントページの続き (72)発明者 石川 操 東京都千代田区丸の内一丁目１番２号 日本鋼管株式会社内 (72)発明者 大屋 廣茂 神奈川県厚木市上依知字上ノ原3012番地 ３ 大屋熱処理株式会社内 (72)発明者 伊藤 経教 神奈川県厚木市上依知字上ノ原3012番地 ３ 大屋熱処理株式会社内 (56)参考文献 特開 昭56−62959（ＪＰ，Ａ) 特開 平２−153017（ＪＰ，Ａ) 特開 平２−294461（ＪＰ，Ａ) 特開 平２−251090（ＪＰ，Ａ) 特開 平２−195255（ＪＰ，Ａ) ────────────────────────────────────────────────── ─── Continuing on the front page (72) Inventor Misao Ishikawa 1-2-1, Marunouchi, Chiyoda-ku, Tokyo Nippon Kokan Co., Ltd. (72) Inventor Hiromo Oya 3012 Uenohara Uenohara, Aoyagi-shi, Kanagawa 3 Heat treatment by Oya Co., Ltd. (72) Inventor Keikyo Ito 3012 Uenohara Uenohara, Atsugi-shi, Kanagawa 3 Oya Heat Treatment Co., Ltd. (56) References JP-A-56-62959 (JP, A) JP-A-2-153017 (JP) JP-A-2-294461 (JP, A) JP-A-2-251090 (JP, A) JP-A-2-195255 (JP, A)
Claims (4)
雰囲気で加熱処理し、チタン材表面でＣＯ 2 が還元され
て生成した酸素と炭素とをチタン表面から内部に拡散さ
せ、表面を黒色化することを特徴とするチタン製加熱料
理器具の表面処理方法。1. A heating apparatus made of titanium is heated in an atmosphere containing CO 2 gas to reduce CO 2 on the surface of the titanium material.
Oxygen and carbon generated by the diffusion from the titanium surface to the inside
A method for treating the surface of a cooked titanium cooking utensil , wherein the surface is blackened.
ｒ，Ｈｅ及びＮ2 のうちの１種以上を含むガスとの混合
ガス雰囲気であることを特徴とする請求項１に記載のチ
タン製加熱料理器具の表面処理方法。2. The heat treatment atmosphere comprises CO 2 gas, A
r, the surface treatment method of titanium heating cooking appliance according to claim 1, characterized in that a mixed gas atmosphere of a gas containing one or more of He and N 2.
を特徴とする請求項１又は２に記載のチタン製加熱料理
器具の表面処理方法。3. The method according to claim 1, wherein the heat treatment temperature is 650 ° C. or higher.
を特徴とする請求項１乃至３いずれか１項に記載のチタ
ン製加熱料理器具の表面処理方法。4. The surface treatment method for a titanium cookware according to claim 1, wherein the partial pressure of CO 2 gas is １ ／ or less.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3159122A JP2584552B2 (en) | 1991-06-28 | 1991-06-28 | Surface treatment method for titanium cookware |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3159122A JP2584552B2 (en) | 1991-06-28 | 1991-06-28 | Surface treatment method for titanium cookware |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH059702A JPH059702A (en) | 1993-01-19 |
| JP2584552B2 true JP2584552B2 (en) | 1997-02-26 |
Family
ID=15686720
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP3159122A Expired - Fee Related JP2584552B2 (en) | 1991-06-28 | 1991-06-28 | Surface treatment method for titanium cookware |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2584552B2 (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| LT4241B (en) | 1997-03-03 | 1997-11-25 | Danielius Lazauskas | Ventilating device |
| US7008669B2 (en) * | 2001-06-13 | 2006-03-07 | Seiko Epson Corporation | Ceramic and method of manufacturing the same, dielectric capacitor, semiconductor device, and element |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5662959A (en) * | 1979-10-22 | 1981-05-29 | Mitsubishi Electric Corp | Blackening method for surface of metal |
| JPH02153017A (en) * | 1988-12-02 | 1990-06-12 | Daido Steel Co Ltd | Method for controlling composition of atmosphere gas in furnace |
| JP2592517B2 (en) * | 1989-01-25 | 1997-03-19 | 日本碍子株式会社 | Apparatus for measuring carbon potential in furnace air in reducing atmosphere furnace |
| JP2693209B2 (en) * | 1989-03-22 | 1997-12-24 | 日本碍子株式会社 | Measuring method of furnace air in reducing atmosphere furnace |
| JPH02294461A (en) * | 1989-05-09 | 1990-12-05 | Mazda Motor Corp | Carburizing treating method for steel member |
-
1991
- 1991-06-28 JP JP3159122A patent/JP2584552B2/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| JPH059702A (en) | 1993-01-19 |
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