JPH08158034A - Strengthening of sprayed coating - Google Patents
Strengthening of sprayed coatingInfo
- Publication number
- JPH08158034A JPH08158034A JP6321207A JP32120794A JPH08158034A JP H08158034 A JPH08158034 A JP H08158034A JP 6321207 A JP6321207 A JP 6321207A JP 32120794 A JP32120794 A JP 32120794A JP H08158034 A JPH08158034 A JP H08158034A
- Authority
- JP
- Japan
- Prior art keywords
- thermal spray
- spray coating
- coating
- sealing
- strengthening
- 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.)
- Withdrawn
Links
Landscapes
- Coating By Spraying Or Casting (AREA)
Abstract
Description
【０００１】[0001]
【産業上の利用分野】本発明は、耐摩耗性、耐食性、耐
熱性などを付与するために行なう金属、サーメットまた
はセラミックス溶射を行なって構造部材の長寿命化を図
るにあたり、形成される溶射皮膜の強化方法に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a thermal spray coating formed in order to extend the life of structural members by performing thermal spraying of metal, cermet or ceramics for imparting wear resistance, corrosion resistance, heat resistance and the like. Regarding the method of strengthening.
【０００２】[0002]
【従来の技術】通常、構造部材の表面改質手段として、
金属、サーメットまたはセラミックス溶射を施し、溶射
皮膜を形成することは各種工業用構造部材に対して適用
されている。従来は、構造部材表面に形成された溶射皮
膜に封孔処理が必要な場合、目的厚さの溶射皮膜を完成
したのちに封孔処理が行なわれている。2. Description of the Related Art Generally, as means for modifying the surface of structural members,
Applying thermal spraying of metal, cermet or ceramics to form a thermal spray coating is applied to various industrial structural members. Conventionally, when a thermal spray coating formed on the surface of a structural member requires a sealing treatment, the sealing treatment is performed after completing the thermal spray coating having a target thickness.
【０００３】したがって、前記した通常の封孔処理の場
合、封孔剤の皮膜内への浸入は高密度皮膜ではその表面
から２〜５μｍ、浸透性の良い皮膜でもせいぜい２０μ
ｍの封孔層が形成されるに過ぎず、５μｍ以上の深さに
なると不完全な封孔が行なわれているのみであった。Therefore, in the case of the above-mentioned ordinary sealing treatment, the penetration of the sealing agent into the film is 2 to 5 μm from the surface of the high density film, and 20 μm at most even if the film has good permeability.
However, only a m-thick sealing layer was formed, and at a depth of 5 μm or more, incomplete sealing was only performed.
【０００４】[0004]
【発明が解決しようとする課題】そのため、溶射皮膜を
形成した構造部材の使用中に表面層が劣化したり摩耗す
ると、封孔処理の効果が低下して構造部材の耐用寿命が
短くなるという問題があった。封孔剤の浸透性を高める
ために、減圧下で封孔処理を行なうことも考えられる
が、コスト高であり、緻密な溶射皮膜の場合には浸透性
に限度があり、皮膜内部までの緻密化には不十分であっ
た。Therefore, if the surface layer is deteriorated or worn during use of the structural member having the sprayed coating, the effect of the sealing treatment is lowered and the service life of the structural member is shortened. was there. It may be possible to perform the sealing treatment under reduced pressure in order to increase the permeability of the sealing agent, but this is costly, and in the case of a dense thermal spray coating, there is a limit to the permeability, and the denseness inside the coating is limited. It was not enough.
【０００５】本発明は、前記した従来の問題点を解決
し、緻密な溶射皮膜の内部まで封孔処理することにより
その緻密性を高めて強化するとともに、耐剥離性に優れ
た溶射皮膜の強化方法を提供することを目的としてい
る。The present invention solves the above-mentioned conventional problems and enhances the denseness of the dense sprayed coating by sealing the inside of the sprayed coating, thereby strengthening the sprayed coating excellent in peel resistance. It is intended to provide a way.
【０００６】[0006]
【課題を解決するための手段】上記目的を達成するた
め、本発明者等は鋭意研究を重ねた結果、溶射層形成の
途中で、封孔剤が完全に固形物化する封孔処理を施すこ
とが有効であることを知見し、本発明を完成するに至っ
た。In order to achieve the above object, the inventors of the present invention have conducted diligent research and as a result, during the formation of the sprayed layer, a sealing treatment for completely solidifying the sealing agent is performed. Was found to be effective, and the present invention has been completed.
【０００７】前記知見に基づいてなされた本発明は、溶
射皮膜を形成するにあたり最終厚さ以下の溶射皮膜形成
段階において、形成された溶射皮膜に対し封孔剤による
封孔処理を行ない、封孔剤を完全に乾燥して固形物化し
た後、さらに溶射皮膜形成を継続することを特徴とする
皮膜内部の封孔緻密化による溶射皮膜の強化方法を要旨
としており、前記溶射皮膜形成工程と封孔処理とを交互
に複数回繰り返すこと、あるいは封孔処理後に加熱およ
びブラッシングのいずれかまたは双方の処理をすること
よりなる皮膜内部の封孔緻密化による溶射皮膜の強化方
法も本発明の要旨である。また本発明は、最上部の仕上
げ溶射層を封孔処理することよりなる皮膜内部の封孔緻
密化による溶射皮膜の強化方法も要旨としており、封孔
処理後、溶射皮膜内にＣｒ2Ｏ3、ＳｉＯ2、Ａｌ2Ｏ3、
ＺｒＯ2、ＣｒＢ2、ＷＢ、Ｍｏ2Ｂ、ＳｉＣ、ＴｉＣ、
ＶＣ、Ｃｒ7Ｃ3、ＮｂＣのいずれか、あるいは２種以上
の共存または混合物を生成する封孔剤を使用すること、
また、封孔処理前後において溶射皮膜材質が異なってい
る溶射皮膜を形成すること、さらに高温、高圧容器内で
封孔処理を行なうことも本発明要旨に含まれている。The present invention made on the basis of the above-mentioned findings is to perform a sealing treatment with a sealing agent on the formed thermal spray coating in the step of forming the thermal spray coating having a final thickness or less when forming the thermal spray coating. After the agent is completely dried and solidified, the thermal spray coating is further formed by continuing to form the thermal spray coating. A method of strengthening a thermal spray coating by densifying the inside of the coating by alternately repeating the treatment and a plurality of treatments, or performing either or both treatments of heating and brushing after the sealing treatment is also the subject matter of the present invention. . The present invention also has a gist of a method for strengthening a sprayed coating by densifying the inside of the coating by sealing the topmost sprayed layer, and after the sealing treatment, Cr 2 O 3 is contained in the sprayed coating. , SiO 2 , Al 2 O 3 ,
ZrO 2 , CrB 2 , WB, Mo 2 B, SiC, TiC,
Use of any of VC, Cr 7 C 3 , and NbC, or a sealing agent that produces a coexistence or a mixture of two or more kinds,
Further, it is also included in the scope of the present invention to form a thermal spray coating having different thermal spray coating materials before and after the sealing treatment and to perform the sealing treatment in a high temperature and high pressure vessel.
【０００８】[0008]
【作用】本発明の構成と作用を説明する。本発明では、
適当な厚さの溶射層を形成したのち、封孔処理後、溶射
皮膜内に酸化物、硼化物、炭化物またはこれらの共存ま
たは混合物を生成する封孔剤あるいは金属アルコキシド
アルコール液などの封孔剤により封孔処理して十分に乾
燥させる。さらに必要に応じて封孔処理表面を１００℃
以上に加熱し、封孔固形物の形成を図る。その後再度同
質または異質の溶射皮膜を形成する工程を施すが、溶射
前に、表面を軽度にブラッシングし、不要の固形物を除
去すると効果的である。さらに加熱処理により封孔剤を
安定化合物にしてもよい。このようにして、封孔処理後
再溶射を行なうことにより溶射皮膜の深層部まで封孔緻
密化をすることが可能となる。The structure and operation of the present invention will be described. In the present invention,
After forming a sprayed layer with an appropriate thickness, after sealing treatment, a sealing agent that forms oxides, borides, carbides or their coexistence or mixture in the sprayed coating, or a sealing agent such as a metal alkoxide alcohol liquid. Sealing treatment is carried out by means of and dried sufficiently. Furthermore, if necessary, the sealing surface may be heated to 100 ° C.
The above heating is performed to form a solid sealing material. After that, a step of forming the same or different thermal spray coating is performed again, but it is effective to lightly brush the surface to remove unnecessary solid matter before thermal spraying. Further, the sealing agent may be made into a stable compound by heat treatment. In this way, by performing re-spraying after the sealing treatment, it becomes possible to densify the sealing up to the deep layer portion of the sprayed coating.
【０００９】前記した工程を繰り返すことにより、厚肉
溶射皮膜の封孔処理を皮膜厚さ全体にわたって十分に行
なうことができる。また、使用目的に応じて、封孔処理
厚さを任意に設定することが可能となる。By repeating the above steps, the sealing treatment of the thick sprayed coating can be sufficiently performed over the entire thickness of the coating. Further, it is possible to arbitrarily set the sealing treatment thickness according to the purpose of use.
【００１０】本発明によれば、従来の封孔処理溶射皮膜
における欠点、すなわち、封孔処理層の厚さが少ない点
は解消され、溶射皮膜を形成した構造部材の寿命は飛躍
的に向上することが約束される。According to the present invention, the drawback of the conventional thermal spray coating for sealing treatment, that is, the point that the thickness of the sealing treatment layer is small is solved, and the life of the structural member on which the thermal spray coating is formed is dramatically improved. Is promised.
【００１１】本発明で使用する封孔剤の濃度や種類は、
溶射皮膜の用途に応じ、また封孔処理時間は溶射皮膜厚
みとの関係によって決定する。普通、クロム酸系の封孔
剤あるいは金属アルコキシドアルコール液などの封孔剤
が使用されるが、耐熱・耐摩耗性ならびに溶射皮膜との
密着性が高い封孔成分を主体とするものであれば、封孔
物組成が酸化物系に限らず、硼化物系や炭化物系あるい
はこれらの混合物系のいずれも使用可能である。封孔処
理を適用する溶射皮膜としては、比較的気孔率の高いサ
ーメットあるいはセラミックス系の皮膜のほうが効果が
あるが、金属系の溶射皮膜に適用してサーメット化する
手段としても利用できる。この場合には封孔剤による生
成固形物を金属層中に分散させることにより、サーメッ
ト皮膜とすることができる。また、この場合必要に応
じ、最終処理として熱処理を適用することにより、溶射
皮膜の緻密化をさらに高めることが可能である。The concentration and type of the sealing agent used in the present invention are
The sealing treatment time is determined according to the application of the thermal spray coating and the relationship with the thickness of the thermal spray coating. Usually, a chromic acid-based sealing agent or a sealing agent such as a metal alkoxide alcohol solution is used, but if it is mainly composed of a sealing component having high heat resistance / wear resistance and high adhesion to a thermal spray coating. The composition of the sealing material is not limited to the oxide type, and any boride type, carbide type or a mixture thereof may be used. As a thermal spray coating to which the pore-sealing treatment is applied, a cermet or ceramic-based coating having a relatively high porosity is more effective, but it can also be used as a means for applying it to a metal-based thermal spray coating to form a cermet. In this case, a cermet film can be obtained by dispersing the solid product produced by the pore-sealing agent in the metal layer. Further, in this case, if necessary, by applying a heat treatment as a final treatment, it is possible to further increase the densification of the thermal spray coating.
【００１２】[0012]
【実施例】本発明を、主に鉄鋼製造ラインで使用される
構造部材の製造に適用した実施例により具体的に説明す
るが、これによって本発明が限定されることはない。 実施例１ 本発明により溶融亜鉛めっき浴中ロールの処理を行なっ
た。薄鋼板の溶融亜鉛めっき浴中ロール表面にサーメッ
トまたはセラミックス溶射を適用した。先ず、素材ロー
ル表面に皮膜厚さ７０μｍの硼化物−ＷＣ系サーメット
の高速ガス溶射を行ない、つづいて形成された皮膜にク
ロム酸系溶液（Ｃｒ2Ｏ3濃度３０％）またはＳｉアルコ
キシドアルコール系封孔剤の単独または両方を塗布し、
十分に乾燥させ、２パスの硼化物−ＷＣ系サーメット溶
射またはＣｒ2Ｏ3系セラミックス溶射の単独もしくは両
方（厚さ約２０μｍ）を行なった。さらにその上に前記
クロム酸系溶液またはＳｉアルコキシドアルコール系封
孔剤の単独もしくは両方を塗布し、４００℃で焼成し
た。EXAMPLES The present invention will be described in more detail with reference to examples in which the present invention is mainly applied to the production of structural members used in steel production lines, but the present invention is not limited thereto. Example 1 A roll in a hot dip galvanizing bath was treated according to the present invention. Cermet or ceramic spraying was applied to the roll surface in a hot dip galvanizing bath for thin steel sheets. First, high-speed gas spraying of a boride-WC cermet with a film thickness of 70 μm was performed on the surface of the material roll, and then the chromic acid solution (Cr 2 O 3 concentration 30%) or Si alkoxide alcohol system seal was applied to the formed film. Apply pores alone or both,
After sufficient drying, two-pass boride-WC based cermet thermal spraying or Cr 2 O 3 based ceramics thermal spraying alone or both (thickness about 20 μm) were performed. Further, the chromic acid-based solution or the Si alkoxide alcohol-based sealing agent alone or both were applied thereon and baked at 400 ° C.
【００１３】この場合、封孔処理層の深さは４０μｍに
達し、最終仕上げとしてのみ封孔処理を行なう従来例に
比べ２倍以上の厚さの封孔処理層がえられた。このロー
ルによる実操業ではクロム酸系溶液またはＳｉアルコキ
シドアルコール系封孔剤の単独使用の場合はいずれも使
用限界寿命が５０日であり、両方を塗布した場合は６０
日の使用限界寿命であった。また、上層溶射を硼化物−
ＷＣ系サーメット溶射またはＣｒ2Ｏ3系セラミックス溶
射の単独で使用した場合、いずれも使用限界寿命は５０
日であった。両方を溶射した場合通常の亜鉛−アルミニ
ウム浴（０．２％Ａｌ）では５０日で差はなかったが、
２〜３％アルミニウム−亜鉛浴で使用した場合は、単独
溶射の場合よりも明らかに効果のあることが判明した。
従来例のロールによる実操業では使用限界寿命が３０日
であり、大きく改善されていることがわかる。これは、
従来法による封孔処理では、表面の封孔層が短時間に摩
耗して劣化が早くなるためと推定される。In this case, the depth of the pore-sealing layer reached 40 μm, and the pore-sealing layer was twice as thick as that of the conventional example in which the pore-sealing treatment was performed only as the final finish. In the actual operation with this roll, the limit life of use is 50 days in both cases where the chromic acid solution or the Si alkoxide alcohol sealant is used alone, and 60 when both are applied.
It was the service life limit of the day. In addition, the upper layer sprayed boride-
When WC-based cermet thermal spraying or Cr 2 O 3 ceramics thermal spraying is used alone, the service life limit is 50
It was a day. When spraying both, there was no difference in 50 days in a normal zinc-aluminum bath (0.2% Al),
When used in a 2-3% aluminum-zinc bath, it was found to be significantly more effective than when sprayed alone.
In the actual operation using the roll of the conventional example, the service life limit is 30 days, which shows that it has been greatly improved. this is,
It is presumed that in the sealing treatment by the conventional method, the sealing layer on the surface is worn in a short time and the deterioration is accelerated.
【００１４】また、溶射加工の最終の１パス溶射を行な
う前に、前工程と同様の封孔処理を行なった場合には封
孔層の密度が上がり、ロール表面への溶融亜鉛付着が少
なくなって溶射皮膜の腐食進行が飛躍的に減少し、通板
している鋼板の品質が著しく向上した。この場合、溶融
亜鉛めっき浴中ロールの使用限界寿命はさらに延びて５
０日以上に達した。Further, when the same sealing treatment as in the previous step is performed before the final one-pass thermal spraying of the thermal spraying process, the density of the sealing layer increases and the adhesion of molten zinc to the roll surface decreases. As a result, the progress of corrosion of the sprayed coating has been dramatically reduced, and the quality of the steel sheet that has been threaded has significantly improved. In this case, the service life of the roll in the hot dip galvanizing bath is further extended by 5
It has reached zero or more days.
【００１５】実施例２ 本発明をハースロールの製造に適用した。ＭＣｒＡｌＹ
系サーメット溶射ロールは、主として連続焼鈍炉および
連続亜鉛めっきラインの焼鈍炉ハースロールとして使用
されている。このロールの溶射皮膜形成後の表面にクロ
ム酸溶液（Ｃｒ2Ｏ3濃度３０％）による封孔処理を行な
ったものは、耐ビルドアップ性に優れていることが知ら
れている。しかし、表面が摩耗してくると、生産量にも
よるが２年程度で耐ビルドアップ性がやや劣化してく
る。Example 2 The present invention was applied to the manufacture of hearth rolls. MCrAlY
The system cermet spraying roll is mainly used as a hearth roll for annealing in a continuous annealing furnace and a continuous galvanizing line. It is known that the surface of the roll on which the sprayed coating has been formed is subjected to a pore-sealing treatment with a chromic acid solution (Cr 2 O 3 concentration of 30%), and has excellent build-up resistance. However, if the surface becomes worn, the build-up resistance will deteriorate slightly in about 2 years depending on the production amount.
【００１６】そこで本発明により、素材ロールにＭＣｒ
ＡｌＹ系サーメットを溶射する際、最後の１パスを残し
て溶射を止め、その表面に実施例１で使用したクロム酸
系溶液で封孔処理をし、２００℃に軽く焼成した後に最
終パスを１５μｍ厚溶射して、その上に前記溶液による
封孔処理を行なった後４００℃の炉中で焼成した。この
結果封孔処理層の厚みが増し、同時に溶射皮膜密度も上
昇して、表面が多少摩耗しても耐ビルドアップ性が低下
しないことが確認された。Therefore, according to the present invention, the material roll is MCr.
When spraying the AlY-based cermet, the spraying was stopped by leaving the last one pass, and the surface was sealed with the chromic acid-based solution used in Example 1, lightly baked at 200 ° C., and then the final pass was 15 μm. Thick thermal spraying was performed, and the solution was sealed with the above solution, and then fired in a furnace at 400 ° C. As a result, it was confirmed that the thickness of the pore-sealing layer was increased, the density of the sprayed coating was increased at the same time, and the buildup resistance was not deteriorated even if the surface was slightly worn.
【００１７】実施例３ 本発明を、酸性溶液中で使用されるブラッシュアップ・
ブライドルロールの製造に適用した。従来、８０℃の５
％硫酸溶液中において使用されるブラッシュアップ・ブ
ライドルロールとしては、ＷＣ−ＮｉＣｒ系サーメット
を溶射した表面皮膜にＳｉアルコキシドアルコール系封
孔剤（Ｓｉ含有量１５％）による封孔処理を行ない、ロ
ール寿命の向上を図ってきた。しかしながら、ロール使
用中、その表面皮膜がブラッシングにより摩耗すると封
孔処理の効果がなくなり、使用限界寿命は１〜２年であ
った。Example 3 The present invention was applied to a brush-up used in an acidic solution.
Applied to the manufacture of bridle rolls. Conventionally, 5 at 80 ℃
% As a brush-up bridle roll used in a sulfuric acid solution, the surface of the WC-NiCr cermet sprayed is sealed with a Si alkoxide alcohol-based sealant (Si content 15%) to achieve roll life. Has been improved. However, when the surface film of the roll was worn by brushing during use, the effect of the sealing treatment was lost, and the service life was 1-2 years.
【００１８】これに対し本発明を適用して、素材ロール
にＷＣ−ＮｉＣｒ系サーメットを溶射するに際し、最終
２パス（３０μｍ）を残して前記Ｓｉアルコキシドアル
コール系封孔剤による封孔処理を行ない、２００℃に表
面焼成後２パス溶射を施して、さらにその上に同一封孔
剤により封孔処理を行なった。その結果、使用限界寿命
は３〜５年に向上した。On the other hand, when the present invention is applied and the WC-NiCr cermet is sprayed on the material roll, a sealing treatment with the Si alkoxide alcohol-based sealing agent is performed with the final two passes (30 μm) left. After surface burning at 200 ° C., two-pass thermal spraying was performed, and a sealing treatment was further performed thereon with the same sealing agent. As a result, the service life limit has been improved to 3 to 5 years.
【００１９】実施例４ 本発明を内燃機関のピストンロッドの製造に適用した。
通常、内燃機関ピストンロッドの耐摩耗性を向上させる
ために、ピストンロッドの摺動部分に酸化クロム系セラ
ミックスの溶射が行なわれている。これに対して本発明
を適用し、ピストンロッドの摺動部分に先ずセラミック
ス溶射を溶射皮膜全厚（３０μｍ）の半分だけ施し、そ
の上にクロム酸系溶液（Ｃｒ2Ｏ3濃度３０％）による封
孔処理を行ない、温度２００℃で表面焼成後、残りの半
分の厚さを溶射し、さらに封孔処理を施してから炉内で
温度４００℃において完全焼成した。その結果、ピスト
ンロッドの使用寿命は、従来法製品に比べ１．５倍長く
なった。Example 4 The present invention was applied to the manufacture of piston rods for internal combustion engines.
Usually, in order to improve the wear resistance of the piston rod of the internal combustion engine, the sliding portion of the piston rod is sprayed with chromium oxide ceramics. On the other hand, applying the present invention, first, ceramics thermal spraying is applied to the sliding portion of the piston rod only to half of the total thickness (30 μm) of the thermal spray coating, and then a chromic acid-based solution (Cr 2 O 3 concentration 30%) After carrying out a sealing treatment and surface baking at a temperature of 200 ° C., the remaining half of the thickness was sprayed and further subjected to a sealing treatment and then completely baked at a temperature of 400 ° C. in a furnace. As a result, the service life of the piston rod is 1.5 times longer than that of the conventional method product.
【００２０】実施例５ 本発明を連続鋳造モールドの製造に適用した。通常連続
鋳造モールドは、耐摩耗性、耐熱亀裂性の向上を目的と
して、Ｎｉめっきの下地処理をしたのちＮｉ−Ｃｒ系の
自溶合金溶射が行なわれている。これに対して本発明を
適用し、鋳造モールド表面にＮｉめっきの下地処理をし
た後、Ｎｉ−Ｃｒ系の自溶合金またはサーメット溶射に
際して、最終２パス（５０μｍ）を残してクロム酸系溶
液（Ｃｒ2Ｏ3濃度３０％）を塗布し十分に乾燥させ、２
パス溶射を行なった。さらにその上に前記溶液を塗布
し、最終処理として４００℃の熱処理を施した。その結
果耐熱亀裂性、耐腐食性が向上し、実操業では従来例に
比べ、寿命が２倍以上となった。Example 5 The present invention was applied to the production of a continuous casting mold. Usually, in a continuous casting mold, Ni-Cr based self-fluxing alloy spraying is carried out after an undertreatment of Ni plating for the purpose of improving wear resistance and heat crack resistance. On the other hand, when the present invention is applied to the surface of the casting mold and the surface of the casting mold is subjected to Ni plating, a chromic acid-based solution ( Cr 2 O 3 concentration of 30%) and apply sufficient drying to
The pass was sprayed. Further, the above solution was applied thereon, and a heat treatment at 400 ° C. was performed as a final treatment. As a result, the heat crack resistance and the corrosion resistance were improved, and the life was more than twice as long as in the conventional example in actual operation.
【００２１】実施例６ 本発明を熱延工場のテーブルローラーの製造に適用し
た。熱延工場のテーブルローラーは、耐摩耗性、耐焼付
性、耐スリップ性が要求されるが、従来は、高Ｃｒ鋳鉄
系鋳造ロールに自溶合金溶射を施して使用されていた。
これに対して本発明を適用し、素材ロールにＮｉＣｒ−
ＷＣ系の自溶合金またはサーメット溶射を行なうに際し
て、最終２パス（５０μｍ）を残してクロム酸系溶液
（Ｃｒ2Ｏ3濃度３０％）を塗布して十分に乾燥させた
後、２パス溶射を行なった。さらにその上に前記溶液を
塗布し、最終処理として４００℃の熱処理を施した。こ
の結果得られたテーブルローラーは、従来の高Ｃｒ鋳鉄
系鋳造ロールの２０倍以上の耐摩耗性を有し、ＮｉＣｒ
−ＷＣ系のサーメット溶射のみでは使用できなかった冷
却水がかかる腐食環境で使用しても、溶射層の剥離が生
じないことが実操業で確認された。Example 6 The present invention was applied to the production of table rollers in a hot rolling mill. The table roller in the hot rolling factory is required to have wear resistance, seizure resistance, and slip resistance, but conventionally, a high Cr cast iron-based casting roll has been used after being sprayed with a self-fluxing alloy.
The present invention is applied to this, and NiCr- is used for the material roll.
When performing WC-based self-fluxing alloy or cermet thermal spraying, a chromic acid-based solution (Cr 2 O 3 concentration 30%) is applied leaving the final 2 passes (50 μm) and sufficiently dried, followed by 2-pass thermal spraying. I did. Further, the above solution was applied thereon, and a heat treatment at 400 ° C. was performed as a final treatment. The table roller obtained as a result has a wear resistance that is 20 times or more that of a conventional high Cr cast iron-based casting roll.
It was confirmed in actual operation that the sprayed layer does not peel even when used in a corrosive environment where cooling water is used, which could not be used only with -WC-based cermet spraying.
【００２２】実施例７ 本発明を腐食環境ライナーの製造に適用した。従来、水
および海水の腐食環境下で使用される耐摩耗性ライナー
は、高Ｃｒ鋳鉄系の鋳かけライナー、サーメットまたは
自溶合金溶射ライナーが使用されていたが、鋳かけライ
ナーは耐摩耗性と欠損が、サーメット溶射ライナーは長
期間使用することによる腐食が問題となっていた。これ
に対して素材ライナーに本発明を適用し、ＮｉＣｒ−Ｗ
Ｃ系のサーメット溶射に際して最終２パス（２０μｍ）
を残してクロム酸系溶液（Ｃｒ2Ｏ3濃度３０％）を塗布
し十分に乾燥させ、２パス溶射を行なった。さらにその
上に前記溶液を塗布し、最終処理として４００℃の熱処
理を施した。この結果、従来の高Ｃｒ鋳鉄系鋳かけライ
ナーに比べ、実操業で寿命が３倍以上に向上した。Example 7 The present invention was applied to the production of a corrosive environment liner. Conventionally, as a wear resistant liner used in a corrosive environment of water and seawater, a high Cr cast iron type cast liner, a cermet or a self-fluxing alloy spray liner has been used. However, the cermet spray liner had a problem of corrosion due to long-term use. On the other hand, the present invention is applied to a material liner, and NiCr-W
Final 2 passes (20 μm) for C-based cermet spraying
A chromic acid-based solution (Cr 2 O 3 concentration: 30%) was applied while leaving the above, sufficiently dried, and two-pass thermal spraying was performed. Further, the above solution was applied thereon, and a heat treatment at 400 ° C. was performed as a final treatment. As a result, in comparison with the conventional high Cr cast iron-based cast liner, the life was improved three times or more in actual operation.
【００２３】実施例８ 本発明を製紙工場の製紙用ロール製造に適用した。通常
製紙用ロールの耐摩耗性を向上させるために、素材ロー
ル表面に対してＷＣ系サーメットの溶射が行なわれてい
る。この場合硫酸系の腐食液が使用されるところでは、
耐食性を付与するための封孔処理が必要である。これに
対して素材ロールに本発明を適用し、先ずサーメット溶
射を溶射皮膜全厚（１００μｍ）の半分だけ施し、その
上にクロム酸系溶液（Ｃｒ2Ｏ3濃度３０％）塗布による
封孔処理を行ない、２００℃で表面を焼成した後、残り
の半分を溶射し、さらに前記溶液による封孔処理を施し
てから、炉内で温度４００℃において完全焼成した。そ
の結果、製紙用ロールの使用寿命は、従来法製品に比べ
て１．５倍長くなった。Example 8 The present invention was applied to the manufacture of papermaking rolls in a paper mill. In order to improve the wear resistance of a papermaking roll, a WC-based cermet is usually sprayed on the surface of the material roll. In this case, where a sulfuric acid-based etchant is used,
Sealing treatment is required to impart corrosion resistance. On the other hand, the present invention is applied to a material roll, and first, cermet thermal spraying is applied only to half of the total thickness of the sprayed coating (100 μm), and a chromic acid-based solution (Cr 2 O 3 concentration of 30%) is applied on the sealing hole for sealing. After baking the surface at 200 ° C., the other half was sprayed, and the pores were sealed with the solution, and then completely baked at a temperature of 400 ° C. in the furnace. As a result, the service life of the papermaking roll is 1.5 times longer than that of the conventional method product.
【００２４】[0024]
【発明の効果】本発明は以上説明したように構成されて
いるから、従来通常の封孔処理を施した溶射皮膜に比較
して耐摩耗性、耐食性、耐熱性などが向上し、構造部材
の長寿命化を図ることができるという優れた効果が奏さ
れ産業上極めて有用である。Since the present invention is constructed as described above, it has improved wear resistance, corrosion resistance, heat resistance, etc. as compared with a conventional sprayed coating which has been subjected to a conventional sealing treatment, and the structural member It has an excellent effect that the life can be extended, which is extremely useful in industry.
Claims (7)
下の溶射皮膜形成段階において、形成された溶射皮膜に
対し封孔剤による封孔処理を行ない、封孔剤を完全に乾
燥して固形物化した後、さらに溶射皮膜形成を継続する
ことを特徴とする皮膜内部の封孔緻密化による溶射皮膜
の強化方法。1. When forming a thermal spray coating, in the step of forming a thermal spray coating having a final thickness or less, the formed thermal spray coating is subjected to a sealing treatment with a sealing agent, and the sealing agent is completely dried to be solidified. After that, a method for strengthening a thermal spray coating by further densifying the pores inside the coating is characterized in that the thermal spray coating is further formed.
複数回繰り返す請求項１記載の皮膜内部の封孔緻密化に
よる溶射皮膜の強化方法。2. The method for strengthening a thermal spray coating by densifying the internal pores of the coating according to claim 1, wherein the thermal spray coating forming step and the sealing treatment are alternately repeated a plurality of times.
異なっている溶射皮膜を形成する請求項１または２記載
の皮膜内部の封孔緻密化による溶射皮膜の強化方法。3. The method for strengthening a thermal spray coating by densifying the internal pores of the coating according to claim 1, wherein the thermal spray coating is formed of different materials before and after the sealing treatment.
いずれかまたは双方の処理をする請求項１、２または３
記載の皮膜内部の封孔緻密化による溶射皮膜の強化方
法。4. A heating treatment, a brushing treatment, or both treatments are performed after the sealing treatment.
A method for strengthening a thermal spray coating by densifying the pores inside the coating described.
求項１ないし４のいずれかに記載の皮膜内部の封孔緻密
化による溶射皮膜の強化方法。5. The method for strengthening a thermal spray coating by densifying the internal pores of the coating according to claim 1, wherein the uppermost finish sprayed layer is subjected to a sealing treatment.
ｉＯ2、Ａｌ2Ｏ3、ＺｒＯ2、ＣｒＢ2、ＷＢ、Ｍｏ2Ｂ、
ＳｉＣ、ＴｉＣ、ＶＣ、Ｃｒ7Ｃ3、ＮｂＣのいずれか、
あるいは２種以上の共存または混合物を生成する封孔剤
を使用する請求項１ないし５のいずれかに記載の皮膜内
部の封孔緻密化による溶射皮膜の強化方法。6. After sealing treatment, Cr 2 O 3 , S in the thermal spray coating.
iO 2 , Al 2 O 3 , ZrO 2 , CrB 2 , WB, Mo 2 B,
Any of SiC, TiC, VC, Cr 7 C 3 , NbC,
Alternatively, the method for strengthening the thermal spray coating by densifying the pores inside the coating according to any one of claims 1 to 5, wherein a pore-sealing agent that forms two or more types of coexisting or mixture is used.
求項１ないし６のいずれかに記載の皮膜内部の封孔緻密
化による溶射皮膜の強化方法。7. The method for strengthening a thermal spray coating by densifying the inside of the coating according to claim 1, wherein the sealing treatment is carried out in a high temperature and high pressure vessel.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP6321207A JPH08158034A (en) | 1994-12-01 | 1994-12-01 | Strengthening of sprayed coating |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP6321207A JPH08158034A (en) | 1994-12-01 | 1994-12-01 | Strengthening of sprayed coating |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH08158034A true JPH08158034A (en) | 1996-06-18 |
Family
ID=18130002
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP6321207A Withdrawn JPH08158034A (en) | 1994-12-01 | 1994-12-01 | Strengthening of sprayed coating |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH08158034A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO1997045566A1 (en) * | 1996-05-24 | 1997-12-04 | Nippon Steel Hardfacing Co., Ltd. | Method of strengthening sprayed coating |
| JP2004190136A (en) * | 2002-11-28 | 2004-07-08 | Tokyo Electron Ltd | Member inside plasma treatment vessel |
| JP2013067836A (en) * | 2011-09-22 | 2013-04-18 | Nisshin Steel Co Ltd | Corrosion resistant roll and method for manufacturing the same |
| JP2013095973A (en) * | 2011-11-02 | 2013-05-20 | Tocalo Co Ltd | Member for semiconductor manufacturing device |
-
1994
- 1994-12-01 JP JP6321207A patent/JPH08158034A/en not_active Withdrawn
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO1997045566A1 (en) * | 1996-05-24 | 1997-12-04 | Nippon Steel Hardfacing Co., Ltd. | Method of strengthening sprayed coating |
| JP2004190136A (en) * | 2002-11-28 | 2004-07-08 | Tokyo Electron Ltd | Member inside plasma treatment vessel |
| JP2013067836A (en) * | 2011-09-22 | 2013-04-18 | Nisshin Steel Co Ltd | Corrosion resistant roll and method for manufacturing the same |
| JP2013095973A (en) * | 2011-11-02 | 2013-05-20 | Tocalo Co Ltd | Member for semiconductor manufacturing device |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| A300 | Withdrawal of application because of no request for examination |
Free format text: JAPANESE INTERMEDIATE CODE: A300 Effective date: 20020205 |