JPH02112805A - Surface treatment for hot plastic working tool - Google Patents
Surface treatment for hot plastic working toolInfo
- Publication number
- JPH02112805A JPH02112805A JP26680388A JP26680388A JPH02112805A JP H02112805 A JPH02112805 A JP H02112805A JP 26680388 A JP26680388 A JP 26680388A JP 26680388 A JP26680388 A JP 26680388A JP H02112805 A JPH02112805 A JP H02112805A
- Authority
- JP
- Japan
- Prior art keywords
- powder
- working tool
- hot plastic
- plastic working
- tool
- 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
- 238000004381 surface treatment Methods 0.000 title claims description 9
- UQSXHKLRYXJYBZ-UHFFFAOYSA-N Iron oxide Chemical compound [Fe]=O UQSXHKLRYXJYBZ-UHFFFAOYSA-N 0.000 claims abstract description 32
- 239000011248 coating agent Substances 0.000 claims abstract description 30
- 239000000843 powder Substances 0.000 claims abstract description 25
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 claims abstract description 24
- 230000003746 surface roughness Effects 0.000 claims abstract description 12
- NTHWMYGWWRZVTN-UHFFFAOYSA-N sodium silicate Chemical compound [Na+].[Na+].[O-][Si]([O-])=O NTHWMYGWWRZVTN-UHFFFAOYSA-N 0.000 claims abstract description 10
- 238000002156 mixing Methods 0.000 claims abstract description 9
- 235000019353 potassium silicate Nutrition 0.000 claims abstract description 8
- 239000000203 mixture Substances 0.000 claims abstract description 3
- 238000000034 method Methods 0.000 claims description 19
- GUTLYIVDDKVIGB-UHFFFAOYSA-N cobalt atom Chemical compound [Co] GUTLYIVDDKVIGB-UHFFFAOYSA-N 0.000 claims description 13
- 238000009413 insulation Methods 0.000 claims description 8
- 238000001035 drying Methods 0.000 claims description 3
- 238000000576 coating method Methods 0.000 abstract description 17
- 239000000463 material Substances 0.000 abstract description 9
- 238000010438 heat treatment Methods 0.000 description 16
- 238000012360 testing method Methods 0.000 description 9
- 238000005553 drilling Methods 0.000 description 7
- 229910000831 Steel Inorganic materials 0.000 description 6
- 239000002184 metal Substances 0.000 description 6
- 229910052751 metal Inorganic materials 0.000 description 6
- 229910044991 metal oxide Inorganic materials 0.000 description 6
- 150000004706 metal oxides Chemical class 0.000 description 6
- 239000010959 steel Substances 0.000 description 6
- 230000000694 effects Effects 0.000 description 5
- 229910052759 nickel Inorganic materials 0.000 description 4
- 239000011230 binding agent Substances 0.000 description 3
- 238000005422 blasting Methods 0.000 description 3
- XEEYBQQBJWHFJM-UHFFFAOYSA-N iron Substances [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 3
- 229910052748 manganese Inorganic materials 0.000 description 3
- 238000012545 processing Methods 0.000 description 3
- 239000004115 Sodium Silicate Substances 0.000 description 2
- 230000015572 biosynthetic process Effects 0.000 description 2
- 229910052804 chromium Inorganic materials 0.000 description 2
- 238000007796 conventional method Methods 0.000 description 2
- SZVJSHCCFOBDDC-UHFFFAOYSA-N ferrosoferric oxide Chemical compound O=[Fe]O[Fe]O[Fe]=O SZVJSHCCFOBDDC-UHFFFAOYSA-N 0.000 description 2
- 230000006698 induction Effects 0.000 description 2
- 230000001590 oxidative effect Effects 0.000 description 2
- 239000002245 particle Substances 0.000 description 2
- 238000005245 sintering Methods 0.000 description 2
- 229910052911 sodium silicate Inorganic materials 0.000 description 2
- 239000010935 stainless steel Substances 0.000 description 2
- 229910001220 stainless steel Inorganic materials 0.000 description 2
- 229910000851 Alloy steel Inorganic materials 0.000 description 1
- 230000001070 adhesive effect Effects 0.000 description 1
- 238000007605 air drying Methods 0.000 description 1
- 229910017052 cobalt Inorganic materials 0.000 description 1
- 239000010941 cobalt Substances 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 238000007602 hot air drying Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 230000003647 oxidation Effects 0.000 description 1
- 238000007254 oxidation reaction Methods 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 230000000630 rising effect Effects 0.000 description 1
- 238000010583 slow cooling Methods 0.000 description 1
- 239000007921 spray Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 238000010998 test method Methods 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Chemical compound O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Landscapes
- Lubricants (AREA)
Abstract
Description
【発明の詳細な説明】
〔産業上の利用分野〕
本発明は、継目無鋼管製造の際の熱間穿孔工程に使用す
る穿孔プラグなど熱間塑性加工工具の表面に断熱性およ
びｉｌ′ｆｌｌ滑性に優れた被膜を形成させる表面処理
方法に関する。Detailed Description of the Invention [Industrial Field of Application] The present invention provides thermal insulation and il'fl l slip on the surface of hot plastic processing tools such as drilling plugs used in the hot drilling process during the production of seamless steel pipes. The present invention relates to a surface treatment method for forming a film with excellent properties.
［従来の技術〕
熱間塑性加工工具として例えば継目無鋼管穿孔用プラグ
は、一般に１２００°Ｃ以上に加熱された鋼片を穿孔す
るために使用する工具であるので、高温、高圧条件下で
焼付、変形、摩耗等に耐えるものでなければならない。[Prior Art] As a hot plastic working tool, for example, a seamless steel pipe drilling plug is a tool that is generally used to drill a steel billet heated to 1200°C or higher, so it does not seize under high temperature and high pressure conditions. It must be resistant to deformation, wear, etc.
従ってプラグ表面には断熱性、潤滑性に優れた被膜の存
在が望ましく、従来、〜静的には酸化性雰囲気中で熱処
理することにより酸化被膜を形成させて使用している。Therefore, it is desirable to have a film with excellent heat insulation and lubricity on the plug surface, and conventionally, statically, an oxide film is formed by heat treatment in an oxidizing atmosphere.
その−例を述べると、重量％でＣ：約０．３％、Ｍｎ：
約０．５％、Ｃｒ：約３％、Ｎ皇；杓１％、残部が実質
的にＦｅからなる材ｔ４で鋳造されたプラグを、水蒸気
を含むフ囲気中で９００°Ｃ〜１゜００°Ｃに加熱後徐
冷する熱処理を施し、プラグ表面に密着性に優れた酸化
被膜を形成させる方法がとられている。To give an example, C: about 0.3%, Mn:
A plug cast from a material T4 consisting of approximately 0.5% Cr, approximately 3% N; 1% ladle, and the remainder substantially Fe was heated at 900°C to 1°00 in an atmosphere containing water vapor. A method of forming an oxide film with excellent adhesion on the surface of the plug is performed by performing a heat treatment of heating to °C and then slowly cooling it.
然しなから、例えばステンレス鋼等、高合金鋼の穿孔に
際しては、材料の変形抵抗が高いために面圧が高くなり
、プラグ表面の酸化被膜の消耗が多くなるとともに被加
工材からの酸化鉄の種石が少なく、結果としてプラグ表
面の酸化被膜の寿命が短く、如何に良好な被膜を形成し
ても数回以下のバスで酸化被膜が消耗し、プラグの焼付
、変形等のために使用不能になることがある。However, when drilling in high-alloy steel such as stainless steel, the surface pressure increases due to the high deformation resistance of the material, which increases the wear of the oxide film on the plug surface and increases the amount of iron oxide from the workpiece. There are few seed stones, and as a result, the life of the oxide film on the plug surface is short, and no matter how good the film is formed, the oxide film will wear out after a few baths, and the plug will become unusable due to seizure, deformation, etc. It may become.
また密着性の良好な酸化被膜を形成させるための熱処理
条件は、前記した加熱後の徐冷を例えば５０°Ｃ／ Ｈ
ｒ程度に遅くすることが必要であり、熱処理に長時間を
要する。従って酸化被膜が消耗した場合、再形成させる
熱処理を繰り返し直ちに間に合わせることができないと
いう問題がある。The heat treatment conditions for forming an oxide film with good adhesion are, for example, slow cooling at 50°C/H after the above-mentioned heating.
It is necessary to slow down the heat treatment to about 100 m, and the heat treatment takes a long time. Therefore, when the oxide film is consumed, there is a problem in that it is not possible to repeat the heat treatment to re-form it immediately in time.
本発明は上記の問題点を解決し、熱間塑性加工工具の表
面に断面性と潤滑性に優れた被膜を容易に形成でき、ま
た迅速に再形成もできる表面処理方法の従供を目的とす
る。The present invention solves the above-mentioned problems, and aims to provide a surface treatment method that can easily form a film with excellent cross-sectional properties and lubricity on the surface of a hot plastic working tool, and can also quickly re-form it. do.
〔問題点を解決するための手段］
熱間塑性加工工具として縫目無鋼管穿孔用プラグを例に
とるならば、従来の酸化性雰囲気中で熱処理することに
より穿孔プラグ表面に形成せしめた酸化被膜が、断熱性
および潤滑性に優れた効果があることはよく知られてい
るが、この被膜成分からなる物質を単にプラグ表面に塗
布するだけでは穿孔時の面圧と摩擦とによって簡単に剥
離して使用に耐えない。[Means for solving the problem] Taking a seamless steel pipe drilling plug as an example of a hot plastic processing tool, an oxide film formed on the surface of the drilling plug by heat treatment in a conventional oxidizing atmosphere. Although it is well known that this film has excellent heat insulation and lubricity properties, simply applying a substance consisting of this film component to the plug surface will easily peel off due to surface pressure and friction during drilling. It cannot withstand use.
本発明者は、耐剥離性に優れた酸化被膜を形成させるた
めの塗布剤について種へ・研究を行った結果次の様な知
見を得た。The present inventor conducted extensive research on a coating agent for forming an oxide film with excellent peeling resistance, and as a result, the following findings were obtained.
■ 断熱性に優れた金属酸化°吻粉末と、ニッケル、コ
バルト等の金属粉末を混合した状態で加熱、加圧下で使
用することにより、金属酸化物粉末の場合よりも強固な
被膜が形成される。■ By using a mixture of metal oxide powder with excellent heat insulation properties and metal powders such as nickel and cobalt under heat and pressure, a stronger film is formed than with metal oxide powder. .
■ 下地表面を適当な表面粗さに調整する事により塗布
剤の付着性が良好となる。■ Adjusting the base surface to an appropriate surface roughness improves the adhesion of the coating agent.
■ 金属酸化物粉末、金属粉末に結合剤を混合して下地
に塗布し乾燥するという簡単な処理で、従来の熱処理に
よって形成された酸化被膜に匹敵し乃至はそれ以上の効
果をもつ被覆が得られる。■ By a simple process of mixing metal oxide powder or metal powder with a binder, applying it to the base, and drying, it is possible to obtain a coating that is comparable to or even more effective than the oxide film formed by conventional heat treatment. It will be done.
本発明は、以上の知見によって完成されたものであって
、その要旨とするところは、熱間塑性加工工具の表面を
Ｒｍａｘ １０μｍ〜１００μｍの範囲の表面粗さに調
整し、該表面に、酸化鉄粉末とニッケルわ）末とをニッ
ケル粉末／酸化鉄粉末（重量）で０．１〜１．０の範囲
で混合した粉末と水ガラスとを混合してなる塗布剤を塗
布 乾燥して断熱性および潤滑性に優れた被膜を形成す
る表面処理方法にある。なお上記塗布剤のニッケル粉末
は、−・部または全部を等量のコバルトわ）末でおき換
えることができる。The present invention has been completed based on the above findings, and its gist is to adjust the surface roughness of a hot plastic working tool to a surface roughness in the range of Rmax 10 μm to 100 μm, and to apply oxidation to the surface. Apply a coating agent made by mixing iron powder and nickel powder (nickel powder/iron oxide powder (weight) in the range of 0.1 to 1.0) and water glass.Dry to create a heat insulating property. and a surface treatment method for forming a coating with excellent lubricity. Note that part or all of the nickel powder in the coating agent can be replaced with an equal amount of cobalt powder.
（作 用］
以下に、本発明の方法における作用を詳細に説明し、合
せて限定理由ならびに好適な範囲を記載する。(Function) The function of the method of the present invention will be explained in detail below, and the reasons for limitation and preferred ranges will also be described.
本発明は熱間塑性加工工具の表面をｌｌ！ｌ当な粗さに
調整するとともに断熱性に優れた金属酸化物と金属粉お
よび結合剤とからなる塗布剤を工具表面に塗布、乾燥す
る熱間塑性加工工具の表面処理法である。金属酸化物と
して酸化鉄粉末、金属粉としてニッケル粉末またはコバ
ルト粉末、さらに結合剤として水ガラスを混合して形成
せしめた被膜は、工具の表面粗さによる付着性と、使用
時の高温加熱によってニッケルまたはコバルト粉末によ
る焼結効果も加わって良好な耐剥離性の被膜を形成し、
被加工材からの入熱を抑制して工具の温度上昇を防ぐと
ともに、酸化鉄と、水ガラスの成分である硅酸ナトリウ
ムによる潤滑性を発渾する。The present invention improves the surface of hot plastic processing tools! This is a surface treatment method for hot plastic working tools that adjusts the roughness to an appropriate level and coats the tool surface with a coating agent made of a metal oxide, metal powder, and binder that has excellent heat insulation properties and dries it. The coating formed by mixing iron oxide powder as a metal oxide, nickel powder or cobalt powder as a metal powder, and water glass as a binder has adhesive properties due to the roughness of the tool surface and nickel due to high temperature heating during use. Alternatively, the sintering effect of cobalt powder is added to form a coating with good peeling resistance.
It suppresses heat input from the workpiece and prevents the temperature of the tool from rising, and also develops lubricity due to iron oxide and sodium silicate, a component of water glass.
本発明の方法を継目無口管穿孔用プラグの例をとって具
体的に詳述すると、次のとおりである。The method of the present invention will be specifically described in detail below using an example of a plug for piercing a seamless pipe.
先ず、プラグ表面粗さを調整し、後述する塗布剤の付着
性を良好にする。その表面粗さはＲｍａｘで１０８ｍか
ら１００８ｍの範囲が良好で、Ｒｍａｘ １０８ｍ未満
では充分な密着性が得ろれす、また１００μｍを超えて
も密着性は劣化する。この表面粗さを付与する手段は、
特に規定するものではないが、−Ｓ的にはショツトブラ
スト或いはグリソトブラストが適当である。First, the surface roughness of the plug is adjusted to improve the adhesion of the coating agent described later. The surface roughness is good when the Rmax is in the range of 108 m to 1008 m; if the Rmax is less than 108 m, sufficient adhesion cannot be obtained, and if it exceeds 100 μm, the adhesion deteriorates. The means for imparting this surface roughness is
Although not particularly specified, shot blasting or glysotho blasting is suitable for -S.
次に、上記表面に塗布剤を塗布する。Next, a coating agent is applied to the above surface.
塗布剤として金属酸化物粉末の種類は、多くのものが考
えられるが、材質への影響や経済性の点から酸化鉄わ）
末が最も適当であると判断される。There are many types of metal oxide powders that can be used as a coating agent, but iron oxide is preferred due to its effect on the material and economic efficiency.
The end is judged to be the most appropriate.
また金属粉末はニソケノ目５）末またはコバルト粉末が
良好な成績が得られ、ニッケル粉末の一部または全部を
コバルトわ）末におき換えても同様の効果が得られるが
、コバルト粉末は高価であるのでニッケル粉末の使用が
推奨される。In addition, good results have been obtained with metal powders such as Nisokeno 5) powder or cobalt powder, and the same effect can be obtained by replacing part or all of the nickel powder with cobalt powder, but cobalt powder is expensive. Therefore, it is recommended to use nickel powder.
酸化鉄粉末はＦ ｅ ｚ ０３ 、 Ｆ ｅ ３０４
等の一般市販品でよく、粒径は特に規定するものではな
いが、分散性、塗布性の点から１０μｍ以下のものが望
ましい。Iron oxide powder is F ez 03, F e 304
The particle size is not particularly limited, but it is preferably 10 μm or less in terms of dispersibility and coating properties.
ニッケル粉末（またはコバルト粉末、以下間し）も同様
に１０μｍ以下の粒径のものが望ましい
上記酸化鉄粉とニッケル粉末を重量比でニッケル粉末／
酸化鉄粉末−０，１〜１．０の範囲で混合し、これを重
量で略々同量の水ガラス（珪酸ナトリウム）に分散させ
たものを塗布剤とする。Similarly, the nickel powder (or cobalt powder, hereinafter referred to as "cobalt powder") preferably has a particle size of 10 μm or less.The weight ratio of the above iron oxide powder and nickel powder is nickel powder/
A coating agent is prepared by mixing iron oxide powder in a range of -0.1 to 1.0 and dispersing it in approximately the same weight of water glass (sodium silicate).
ここでニッケル粉末／酸化鉄粉末の割合が０．１より少
ない場合には加熱されることによる焼結の効果が少なく
、被膜の密着性が悪くなり好ましくない。If the ratio of nickel powder/iron oxide powder is less than 0.1, the effect of sintering due to heating will be small and the adhesion of the coating will deteriorate, which is not preferable.
また、ニッケル粉末／酸化鉄粉末の割合が１．０を超す
場合はプラグ表面と被加工材との間に焼付が発生し易く
なり好ましくない。Further, if the ratio of nickel powder/iron oxide powder exceeds 1.0, seizure may easily occur between the plug surface and the workpiece, which is not preferable.
本発明の方法においては、このようにつくられた塗布剤
をプラグ表面に塗布した後、乾燥して被膜を形成する。In the method of the present invention, the coating agent thus prepared is applied to the plug surface and then dried to form a film.
塗布はスプレー塗布でもよく、また刷毛塗りでも良い。Application may be by spray application or by brush application.
乾燥は自然乾燥でも良いが熱風乾燥が短時間で行えるの
でより好ましい。被膜の厚さは少な（とも表面粗さのＲ
ｈ＋ａｘ以上は必要があり、通常、乾燥状態で１００μ
ｍ以上が必要である。Although air drying may be used for drying, hot air drying is more preferable since it can be carried out in a short time. The thickness of the coating is small (also known as surface roughness R).
H + ax or more is required, usually 100μ in dry condition
m or more is required.
上記の如くにして形成された被膜は、従来の最も密着性
に優れた酸化被膜に較べ、耐〃り離性、断熱性、潤滑性
ともに同等以上であり、しかも被膜形成処理が簡単、迅
速にできるから、例えばバス毎に被膜を再形成して工具
の寿命の一層の延長をはかることができる。The film formed as described above has peeling resistance, heat insulation, and lubricity that are at least the same as the conventional oxide film with the best adhesion, and the film formation process is simple and quick. For example, the coating can be re-coated after each bath to further extend the life of the tool.
これらの形成被膜の高温材料に対する潤滑性、咬いは被
膜を形成した工！！（プラグ）の変形等を評価するため
に第１図に示す方法で試験を行った。The lubricity of these formed films against high-temperature materials and their bite are the processes that formed the films! ! In order to evaluate the deformation of the plug, etc., a test was conducted using the method shown in FIG.
すなわち同図に示す如く、工具（プラグ）に相当する試
験片１（外径１０価φ、内径２０ｍｍφ、高さ１０＋ｎ
ｍ）の端面ａに第１表及び第２表に示す各種の表面処理
を施し、被加工材に相当する試験片２（外径５０ｍｍ）
を回転させながら高周波誘導加熱コイル３で１２００°
Ｃに加熱した・瑞面すに圧力Ｐ＝１ｋｇ／Ｍ”で１０分
間押しつけ、その摩擦係数と、工具相当試験片ｌの試験
前後の高さｈの変化を変形量として測定した。この場合
の材質は、試験片ｌは０．２５％Ｃ１０，５％Ｍｎ、３
％Ｃ「、１％Ｎｉ鋼であり、試験片２は５ＵＳ３１０ス
テンレス鋼である。That is, as shown in the same figure, a test piece 1 corresponding to a tool (plug) (outer diameter 10 mm φ, inner diameter 20 mm φ, height 10+n
The various surface treatments shown in Tables 1 and 2 were applied to the end surface a of m), and a test piece 2 (outer diameter 50 mm) corresponding to the workpiece was prepared.
1200° with high frequency induction heating coil 3 while rotating
The material was pressed against a surface heated to C for 10 minutes at a pressure of P = 1 kg/M'', and the friction coefficient and the change in height h of the tool-equivalent test piece l before and after the test were measured as the amount of deformation. The material is 0.25% C10, 5% Mn, 3
%C'', 1%Ni steel, and specimen 2 is 5US310 stainless steel.
第１表及び第２表にその結果を示す。第１表１は酸化鉄
粉末として最も一般的なＦｃア０□を使用した例である
。熱処理に依る従来法の場合は同表最下段に示す通りで
、この場合の摩擦係数０゜４０、Ｆ２！擦による変形Ｉ
ｔ０．５２ ｍｍ ニ比し、摩擦係数が低く、且つ摩擦
による変形量の少ないものを良好な被膜と評価できる。The results are shown in Tables 1 and 2. Table 1 shows an example using FcA0□, which is the most common iron oxide powder. In the case of the conventional method based on heat treatment, as shown in the bottom row of the same table, the friction coefficient in this case is 0°40, F2! Deformation due to rubbing I
A film with a low coefficient of friction and a small amount of deformation due to friction can be evaluated as a good coating.
なお、第１表−２は酸化鉄としてＦｅ３Ｏ４を使用した
場合の例であるが、この場合もＦｃ２０３と略々同様の
結果が得られた。Note that Table 1-2 shows an example in which Fe3O4 was used as the iron oxide, and almost the same results as Fc203 were obtained in this case as well.
また、第２表は金属粉としてニッケル粉末のほかにコバ
ルト粉末を使用した場合の例であり、ニッケル粉末の−
・部或いは全部を等量のコバルト粉末でおき換えた場合
でもニノケノ日′、）末の場合とほぼ同様の結果がｔ！
）られた。In addition, Table 2 shows an example of using cobalt powder in addition to nickel powder as the metal powder.
・Even if part or all of the cobalt powder was replaced with an equal amount of cobalt powder, the results were almost the same as those at the end of the day.
) was given.
ｌ
表
第
表
なお本発明に基づき重量％でＣ：０．２５％、Ｍｎ：０
．５％、Ｃｒ ： ３．１％、Ｎｉ：０．９％、残部実
質的にＦｅからなる鋳造プラグをショツトブラストでＲ
ｍａｘ５０μｍおよび１００μｍの表面粗さに３Ｆ］整
し、Ｎｉ／Ｆｅｔ０３を０．１および１．０のｌ具合粉
末と、同量の水ガラスを混合してなる塗布剤を塗布、乾
燥して約２００μｍ厚の被膜を形成したプラグを使用し
て、５ＵＳ３０４材の６０φ×３００１の鋼片を１２０
０ ”Ｃで穿孔してプラグの寿命を従来の熱処理により
酸化被膜を形成したプラグの寿命と比較した結果、第３
表に示すように本発明法のものは従来法のものと同等以
上の寿命を有することが判明した。さらに本発明の特徴
の一つが被膜形成処理が迅速、簡単にできることにあり
、例えばｌバス毎に被膜の再形成が可能であるので、繰
り返し処理することによって第４表に示すようにプラグ
の寿命の一層の延長が可能であった。l Table Note that based on the present invention, C: 0.25%, Mn: 0 in weight%
．． A cast plug consisting of 5%, Cr: 3.1%, Ni: 0.9%, and the remainder substantially Fe was rounded by shot blasting.
The surface roughness was adjusted to a maximum of 50 μm and 100 μm (3F), and a coating agent made by mixing 0.1 and 1.0 l powder of Ni/Fet03 with the same amount of water glass was applied and dried to a surface roughness of about 200 μm. Using a plug with a thick coating, a 60φ x 3001 piece of 5US304 steel was
As a result of comparing the life of a plug drilled with 0"C with that of a plug with an oxide film formed by conventional heat treatment, the third
As shown in the table, it was found that the products produced by the method of the present invention had a lifespan equal to or longer than those produced by the conventional method. Furthermore, one of the features of the present invention is that the film formation process can be performed quickly and easily. For example, the film can be re-formed every 1 bath, so by repeating the process, the service life of the plug can be extended as shown in Table 4. Further extension of the period was possible.
ＭはＮｉ＋Ｃｏを表わず
〔発明の効果〕
本発明によれば、熱間塑性加工工具の表面に極めて迅速
、容易に被膜が形成でき、その被膜は従来の最も密着性
に優れた酸化被膜に比し、断熱性、潤滑性、耐変形性と
もに同等以上であり、しかも被膜形成処理が簡単、迅速
にできるから、例えば１パス毎に被膜を再形成して工具
寿命を大幅に向上できる等の効果がある。M does not represent Ni+Co [Effects of the Invention] According to the present invention, a film can be formed extremely quickly and easily on the surface of a hot plastic working tool, and the film is superior to the conventional oxide film with the highest adhesiveness. In comparison, the heat insulation properties, lubricity, and deformation resistance are all the same or better, and the coating can be formed easily and quickly, so for example, the coating can be re-formed after each pass, greatly extending tool life. effective.
【図面の簡単な説明】
第１図は被膜の潤滑性と耐変形性を評価するための熱間
摩擦試験方法を示す。
ｌ；工具相当試験片、２；被加工材相当試験片、３；高
周波誘導加熱コイル、ａ；試験片ｌの端面、ｂ：試験片
２の端面。BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 shows a hot friction test method for evaluating the lubricity and deformation resistance of coatings. l: test piece equivalent to a tool, 2: test piece equivalent to a workpiece, 3: high-frequency induction heating coil, a: end face of test piece l, b: end face of test piece 2.
Claims (1)
０μｍの範囲の表面粗さに調整し、該表面に、酸化鉄粉
末とニッケル粉末とをニッケル粉末／酸化鉄粉末（重量
）で０．１〜１．０の範囲で混合した粉末と水ガラスと
を混合してなる塗布剤を塗布、乾燥して断熱性および潤
滑性に優れた被膜を形成することを特徴とする熱間塑性
加工工具の表面処理方法。 ２、請求項（１）に記載の表面処理方法において、塗布
剤のニッケル粉末の一部または全部を等量のコバルト粉
末でおき換えた塗布剤を使用することを特徴とする熱間
塑性加工工具の表面処理方法。[Claims] 1. The surface of the hot plastic working tool has an Rmax of 10 μm to 10 μm.
The surface roughness was adjusted to a range of 0 μm, and the surface was coated with a mixture of iron oxide powder and nickel powder (nickel powder/iron oxide powder (weight) in a range of 0.1 to 1.0) and water glass. 1. A method for surface treatment of a hot plastic working tool, which comprises applying a coating agent made by mixing the above and drying to form a film having excellent heat insulation and lubricity. 2. In the surface treatment method according to claim (1), a hot plastic working tool characterized in that a coating agent in which part or all of the nickel powder in the coating agent is replaced with an equal amount of cobalt powder is used. surface treatment method.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP26680388A JPH02112805A (en) | 1988-10-21 | 1988-10-21 | Surface treatment for hot plastic working tool |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP26680388A JPH02112805A (en) | 1988-10-21 | 1988-10-21 | Surface treatment for hot plastic working tool |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH02112805A true JPH02112805A (en) | 1990-04-25 |
Family
ID=17435897
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP26680388A Pending JPH02112805A (en) | 1988-10-21 | 1988-10-21 | Surface treatment for hot plastic working tool |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH02112805A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2014041787A1 (en) * | 2012-09-11 | 2014-03-20 | Ｊｆｅスチール株式会社 | Plug for rolling seamless steel pipe, method for manufacturing said plug, and method for manufacturing seamless steel pipe in which said plug is used |
| CN105177441A (en) * | 2015-08-31 | 2015-12-23 | 铜陵市大明玛钢有限责任公司 | Manufacturing process for cold-roll steel sheet used for liquid crystal screen framework |
-
1988
- 1988-10-21 JP JP26680388A patent/JPH02112805A/en active Pending
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2014041787A1 (en) * | 2012-09-11 | 2014-03-20 | Ｊｆｅスチール株式会社 | Plug for rolling seamless steel pipe, method for manufacturing said plug, and method for manufacturing seamless steel pipe in which said plug is used |
| JP2014054637A (en) * | 2012-09-11 | 2014-03-27 | Jfe Steel Corp | Seamless steel pipe rolling plug and method for manufacturing the same |
| CN104619434A (en) * | 2012-09-11 | 2015-05-13 | 杰富意钢铁株式会社 | Plug for rolling seamless steel pipe, method for manufacturing said plug, and method for manufacturing seamless steel pipe in which said plug is used |
| US10441982B2 (en) | 2012-09-11 | 2019-10-15 | Jfe Steel Corporation | Plug for rolling of seamless steel pipe, method for manufacturing the same and method for manufacturing seamless steel pipe using the same |
| CN105177441A (en) * | 2015-08-31 | 2015-12-23 | 铜陵市大明玛钢有限责任公司 | Manufacturing process for cold-roll steel sheet used for liquid crystal screen framework |
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