JPS6114227B2 - - Google Patents
Info
- Publication number
- JPS6114227B2 JPS6114227B2 JP56191825A JP19182581A JPS6114227B2 JP S6114227 B2 JPS6114227 B2 JP S6114227B2 JP 56191825 A JP56191825 A JP 56191825A JP 19182581 A JP19182581 A JP 19182581A JP S6114227 B2 JPS6114227 B2 JP S6114227B2
- Authority
- JP
- Japan
- Prior art keywords
- surface treatment
- inorganic
- sprayed layer
- substance
- glassy
- 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
Links
- 238000004381 surface treatment Methods 0.000 claims description 20
- 239000000126 substance Substances 0.000 claims description 16
- 229910010272 inorganic material Inorganic materials 0.000 claims description 13
- 239000011147 inorganic material Substances 0.000 claims description 13
- 239000000463 material Substances 0.000 claims description 13
- 238000000034 method Methods 0.000 claims description 12
- 229910018072 Al 2 O 3 Inorganic materials 0.000 claims description 10
- 229910004298 SiO 2 Inorganic materials 0.000 claims description 5
- 239000000203 mixture Substances 0.000 claims description 2
- 239000011248 coating agent Substances 0.000 description 17
- 238000000576 coating method Methods 0.000 description 17
- 230000000873 masking effect Effects 0.000 description 14
- 239000000843 powder Substances 0.000 description 8
- 238000011282 treatment Methods 0.000 description 6
- 239000011521 glass Substances 0.000 description 5
- 238000005255 carburizing Methods 0.000 description 4
- 230000035939 shock Effects 0.000 description 4
- 238000005507 spraying Methods 0.000 description 4
- 238000009792 diffusion process Methods 0.000 description 3
- 238000002844 melting Methods 0.000 description 3
- 230000008018 melting Effects 0.000 description 3
- 230000035515 penetration Effects 0.000 description 3
- 238000007751 thermal spraying Methods 0.000 description 3
- 238000007796 conventional method Methods 0.000 description 2
- 238000005336 cracking Methods 0.000 description 2
- 238000005121 nitriding Methods 0.000 description 2
- 230000002265 prevention Effects 0.000 description 2
- 239000007921 spray Substances 0.000 description 2
- 239000000758 substrate Substances 0.000 description 2
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- 238000005299 abrasion Methods 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 238000005422 blasting Methods 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 239000000919 ceramic Substances 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000000155 melt Substances 0.000 description 1
- 238000007750 plasma spraying Methods 0.000 description 1
- 238000007747 plating Methods 0.000 description 1
- 239000011148 porous material Substances 0.000 description 1
- 229920005989 resin Polymers 0.000 description 1
- 239000011347 resin Substances 0.000 description 1
- 239000011800 void material Substances 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
- C23C10/00—Solid state diffusion of only metal elements or silicon into metallic material surfaces
- C23C10/04—Diffusion into selected surface areas, e.g. using masks
-
- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
- C23C4/00—Coating by spraying the coating material in the molten state, e.g. by flame, plasma or electric discharge
- C23C4/01—Selective coating, e.g. pattern coating, without pre-treatment of the material to be coated
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Materials Engineering (AREA)
- Mechanical Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Physics & Mathematics (AREA)
- Plasma & Fusion (AREA)
- Coating By Spraying Or Casting (AREA)
- Other Surface Treatments For Metallic Materials (AREA)
Description
【発明の詳細な説明】
本発明は、浸炭、拡散浸透透処理のように高温
で表面処理する際の非処理部分の表面処理防止方
法に関するものである。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method for preventing surface treatment of untreated portions during surface treatment at high temperatures such as carburization and diffusion permeation treatment.
表面処理技術は基材が有していない特性を比較
的容易に付加するもので、耐食性、耐摩耗性、装
飾性等の向上に非常に有効な手段として用いられ
ている。一般にこれらの表面処理は基材の特性を
生かす機能上および経済上の理由から、その処理
を必要とされる部分にのみ局部的に施し、非処理
部分にはマスキングと呼ばれる被覆を設けて行な
つている。 Surface treatment technology relatively easily adds properties that the base material does not have, and is used as a very effective means for improving corrosion resistance, abrasion resistance, decorativeness, etc. In general, these surface treatments are applied locally only to the areas where they are needed, for functional and economical reasons that take advantage of the characteristics of the base material, and the untreated areas are covered with a mask called masking. ing.
このマスキングは、表面処理が常温で行なわれ
るメツキなどの場合には、樹脂等の有機性被覆剤
が有効である。しかしながら浸炭、浸窒、ホウ
化、拡散浸透処理など、表面処理が高温で行なわ
れる場合には、有機性被覆剤では溶融してしまう
ため無機系の被覆剤が用いられる。 For this masking, organic coating agents such as resins are effective in cases such as plating where surface treatment is performed at room temperature. However, when surface treatments such as carburizing, nitriding, boriding, and diffusion/penetration treatments are carried out at high temperatures, organic coatings melt, so inorganic coatings are used.
従来、無機系の被覆剤を用いてマスキングする
方法としては、例えばSiO2粉や、Al2O3粉をペー
スト状にしたものを基材に塗布する方法がある
が、これは得られた被覆が多孔質であるため表面
処理ガスが透過し易い上、熱衝撃によつて亀裂を
生じ易い。このため厚い被覆を形成しているが、
これでも十分に防止できず、また後処理で被覆す
る除去する手間もかかるなどの問題があつた。ま
た被覆剤としてガラス状物質を塗布する方法もあ
るが、高温処理中にガラス状物質が溶融して流動
するため被覆厚さが不均一となり、防止効果の信
頼性に乏しく、亀裂も生じ易いなどの欠点があつ
た。 Conventional methods for masking using inorganic coating agents include applying a paste of SiO 2 powder or Al 2 O 3 powder to the substrate; Since it is porous, it is easy for surface treatment gas to pass through it, and it is also easy to crack due to thermal shock. For this reason, a thick coating is formed, but
Even with this method, the problem could not be sufficiently prevented, and there were also problems such as the need to remove the coating in post-treatment. Another method is to apply a glassy substance as a coating, but the glassy substance melts and flows during high-temperature treatment, resulting in uneven coating thickness, poor prevention effectiveness, and easy cracking. There were some shortcomings.
本発明はかかる点に鑑みなされたもので、高温
で表面処理において高いマスキング特性を有し、
しかも熱衝撃に対して安定性の高い表面処理防止
方法を提供するものである。 The present invention was made in view of this point, and has high masking properties in surface treatment at high temperatures.
Moreover, it provides a method for preventing surface treatment that is highly stable against thermal shock.
即ち本発明方法は、基材の所定部分を残して局
部的に表面処理を行なう際、非処理部分の表面に
無機物質を溶射して多孔質の無機物質溶射層を付
着した後、更にこの表面に前記無機物質よりも軟
化点の低いガラス状物質を融着させることを特徴
とするものである。 That is, in the method of the present invention, when performing local surface treatment while leaving a predetermined portion of the base material, after spraying an inorganic material onto the surface of the untreated portion to adhere a porous inorganic material spray layer, this surface is further coated. The method is characterized in that a glassy substance having a softening point lower than that of the inorganic substance is fused to the inorganic substance.
以下本発明方法を詳細に説明する。 The method of the present invention will be explained in detail below.
本発明において、基材の非処理部分の表面に、
溶射により付着する無機物質としては、例えば
Al2O3，ZnO2，SiO2などのセラミツク粉末の何れ
か１種または２種以上混合したものを用いる。こ
の無機物質溶射層は通常行なわれる溶射に比べて
多孔質に形成し、その理論密度は60〜80％程度の
範囲とする。この場合理論密度が60％末満ではこ
の表面に融着させるガラス状物質の浸透が多く、
均一な膜形成がし難く、また80％を超えると表面
処理の際高温に昇温中割れが入り易くなる。 In the present invention, on the surface of the untreated part of the base material,
Examples of inorganic substances deposited by thermal spraying include:
One or a mixture of two or more of ceramic powders such as Al 2 O 3 , ZnO 2 , and SiO 2 is used. This inorganic material sprayed layer is formed to be more porous than the normally-performed sprayed layer, and its theoretical density is in the range of about 60 to 80%. In this case, when the theoretical density is less than 60%, there is a lot of penetration of the glassy substance to be fused to this surface.
It is difficult to form a uniform film, and if it exceeds 80%, cracks are likely to occur during surface treatment when the temperature is raised to high temperatures.
無機物質溶射層の表面に形成するガラス状物質
としてはCaO，PbO等の軟化点を低下させる酸化
物を含んだSiO2等で形成されている。このガラ
ス状物質の融着方法としてはガラス粉末を溶射す
る方法の他、ガラス粉末を塗布して火炎で溶融す
るか、またはガラス粉末を塗布した後、炉内に投
入して溶融する方法など何れでも良い。 The glassy substance formed on the surface of the inorganic material sprayed layer is made of SiO 2 or the like containing oxides such as CaO and PbO that lower the softening point. Methods for fusing this glass-like substance include spraying glass powder, applying glass powder and melting it with flame, or applying glass powder and then putting it in a furnace and melting it. But it's okay.
ガラス状物質の厚さは20〜30μｍ程度であれば
十分であるが、均一な膜形成が可能な場合にはこ
れより薄くても良い。 It is sufficient that the thickness of the glassy substance is about 20 to 30 μm, but it may be thinner than this if uniform film formation is possible.
従つて本発明では基材の非処理部分の表面に無
機物質を溶射して多孔質の無機物質溶射層を形成
した後、この表面にガラス状物質を融着させる
と、このガラス状物質は多孔質の無機物質溶射層
の表面に緻密な膜を形成すると共に、その一部は
無機物質溶射層に充填されて、この表面側を外部
から完全に遮断する。 Therefore, in the present invention, after spraying an inorganic material onto the surface of the untreated portion of the base material to form a porous sprayed layer of inorganic material, when a glassy material is fused to this surface, this glassy material becomes porous. A dense film is formed on the surface of the inorganic material sprayed layer, and a part of the film is filled in the inorganic material sprayed layer, completely shielding this surface side from the outside.
この結果、表面処理ガスの透過を確実に防止
し、基材の非処理部分を完全に保護する。またマ
スキング被覆は高融点の無機物質溶射層で形成さ
れているので高温でも安定であり、浸炭、浸窒、
ホウ化、拡散浸透処理など高温中における表面処
理に好適である。更に基材と、多孔質の無機物質
溶射層とは接し、互に熱膨張係数も近いので熱衝
撃に対して強く、基材の昇温や炉中投入によつて
もクラツチの発生を防止することができる。また
表面処理後、マスキングした被覆を除去する際に
は、無機物質溶射層は通常の溶射層に比べて多孔
質であるので、軽く割ることにより容易に剥離で
き、またプラスト処理により短時間で剥離するこ
とができる。 As a result, permeation of the surface treatment gas is reliably prevented and the untreated portion of the substrate is completely protected. In addition, the masking coating is made of a sprayed layer of inorganic material with a high melting point, so it is stable even at high temperatures, and is free from carburizing, nitriding, and
Suitable for surface treatments at high temperatures such as boriding and diffusion/penetration treatments. Furthermore, the base material and the porous inorganic material sprayed layer are in contact with each other and have similar coefficients of thermal expansion, so they are resistant to thermal shock and prevent the occurrence of clutches even when the base material is heated or placed in a furnace. be able to. In addition, when removing the masked coating after surface treatment, the inorganic material sprayed layer is more porous than a normal sprayed layer, so it can be easily removed by cracking it lightly, and it can be removed in a short time using the blast treatment. can do.
次に本発明の実施例について説明する。 Next, examples of the present invention will be described.
第１図に示すように、レバー１の摺動部分２に
耐摩耗性を向上させるために浸炭を行なう際、他
の非処理部分３は靭性を損なわないように浸炭を
防止する必要がある。 As shown in FIG. 1, when the sliding portion 2 of the lever 1 is carburized to improve wear resistance, it is necessary to prevent carburization of the other untreated portion 3 so as not to impair toughness.
先ず摺動部分２の表面をアルミニウム薄板で覆
つた後、レバー１の露出した非処理部分３の表面
にプラズマ溶射により第２図に示すようにAl2O3
を0.3mm厚さに付着してAl2O3溶射層４を形成し
た。この場合非処理部分３の表面とプラズマ溶射
ガンとの距離を、通常の溶射が行なわれる距離の
約２倍とし、得られたAl2O3溶射層４の理論密度
を約80％の多孔質とした。 First, the surface of the sliding part 2 is covered with a thin aluminum plate, and then the surface of the exposed untreated part 3 of the lever 1 is coated with Al 2 O 3 by plasma spraying as shown in FIG.
was deposited to a thickness of 0.3 mm to form an Al 2 O 3 sprayed layer 4. In this case, the distance between the surface of the untreated portion 3 and the plasma spray gun is approximately twice the distance for normal spraying, and the theoretical density of the resulting Al 2 O 3 sprayed layer 4 is approximately 80% porous. And so.
次にAl2O3溶射層の表面にCaO5重量％、
PbO30重量％残部SiO2からなるガラス粉末を溶射
して厚さ0.1mmのガラス状物質層５を融着した。
このように２層の溶射層で形成されたマスキング
被覆６の断面を拡大した状態は第２図に示すよう
に、非処理部分３の表面に多孔質のAl2O3溶射層
４が付着し、更にこの表面にガラス状物質層５が
融着して、その一部がAl2O3溶射層４の空孔７に
充填されていた。 Next, 5% by weight of CaO was added to the surface of the Al 2 O 3 sprayed layer.
A glass powder layer 5 having a thickness of 0.1 mm was fused by thermal spraying a glass powder consisting of 30% by weight of PbO and the balance being SiO 2 .
As shown in FIG. 2, an enlarged cross-section of the masking coating 6 formed of two sprayed layers shows that the porous Al 2 O 3 sprayed layer 4 is attached to the surface of the untreated portion 3. Further, a glassy material layer 5 was fused to this surface, and a portion of the glassy material layer 5 filled the pores 7 of the Al 2 O 3 sprayed layer 4 .
次いで溶射によつてマスキング被覆６を形成し
たレバー１を浸炭処理炉に投入して、所定の条件
で浸炭処理したところ、マスキング被覆６を設け
た非処理部分３には炭素濃度の増加による組識変
化は全く認められず確実にマスキング被覆されて
いたことが確認された。またマスキング被覆６を
除去するためにブラスト処理を行なつたが、従来
に比べ1/5程度の短時間の処理で除去することが
できた。 Next, when the lever 1 on which the masking coating 6 was formed by thermal spraying was put into a carburizing furnace and carburized under predetermined conditions, the untreated portion 3 where the masking coating 6 was provided had a structure due to an increase in carbon concentration. No changes were observed, and it was confirmed that the masking coating had been applied reliably. Furthermore, blasting was performed to remove the masking coating 6, but it was possible to remove it in a processing time that was about 1/5th that of the conventional method.
以上説明した如く、本発明に係わる表面処理防
止法によれば、高温での表面処理において高いマ
スキング被覆特性を有し、しかも熱衝撃に対して
安定性の高いマスキング被覆を得ることができる
ものである。 As explained above, according to the surface treatment prevention method of the present invention, it is possible to obtain a masking coating that has high masking coating properties in surface treatment at high temperatures and is highly stable against thermal shock. be.
第１図は浸炭処理を行なうレバーの斜視図、第
２図は本発明の一実施例により形成したマスキン
グ被覆の拡大断面図である。
１…レバー、２…摺動部分、３…非処理部分、
４…Al2O3溶射層、５…ガラス状物質層、６…マ
スキング被覆、７…空孔。
FIG. 1 is a perspective view of a lever for carburizing, and FIG. 2 is an enlarged sectional view of a masking coating formed according to an embodiment of the present invention. 1...Lever, 2...Sliding part, 3...Non-processed part,
4... Al 2 O 3 sprayed layer, 5... Glassy material layer, 6... Masking coating, 7... Void.
Claims (1)
行なう際、非処理部分の表面に無機物質を溶射し
て理論密度60〜80％の多孔質の無機物質溶射層を
付着した後、更にこの表面に前記無機物質よりも
軟化点の低いガラス状物質を融着させることを特
徴とする表面処理防止方法。 ２ 無機物質としてAl2O3，ZnO2，SiOｍ何れか
１種または２種以上を混合したものを用いること
を特徴とする特許請求の範囲第１項記載の表面処
理防止方法。 ３ ガラス状物質としてCaO，PbOなどを含む
SiO2を用いることを特徴とする特許請求の範囲
第１項記載の表面処理防止方法。[Claims] 1. When performing local surface treatment while leaving a predetermined portion of the base material, an inorganic material is thermally sprayed onto the surface of the untreated portion to form a porous inorganic material sprayed layer with a theoretical density of 60 to 80%. 1. A method for preventing surface treatment, which comprises: adhering the inorganic substance to the surface of the inorganic substance, and then fusing a glassy substance having a softening point lower than that of the inorganic substance. 2. The method for preventing surface treatment according to claim 1, characterized in that one or a mixture of two or more of Al 2 O 3 , ZnO 2 , and SiOm is used as the inorganic substance. 3 Contains CaO, PbO, etc. as glassy substances
The method for preventing surface treatment according to claim 1, characterized in that SiO 2 is used.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP56191825A JPS5893865A (en) | 1981-12-01 | 1981-12-01 | Method for preventing surface from thermal shock |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP56191825A JPS5893865A (en) | 1981-12-01 | 1981-12-01 | Method for preventing surface from thermal shock |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS5893865A JPS5893865A (en) | 1983-06-03 |
| JPS6114227B2 true JPS6114227B2 (en) | 1986-04-17 |
Family
ID=16281141
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP56191825A Granted JPS5893865A (en) | 1981-12-01 | 1981-12-01 | Method for preventing surface from thermal shock |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5893865A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2017098854A1 (en) * | 2015-12-09 | 2017-06-15 | 日本電気硝子株式会社 | Sealer, sealer coating solution, corrosion resistant film, high temperature member, and method for manufacturing high temperature member |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS59169347U (en) * | 1983-04-27 | 1984-11-13 | 光洋精工株式会社 | Shaft with keyway |
| JPH02217482A (en) * | 1989-12-16 | 1990-08-30 | Yoshikawa Kogyo Co Ltd | Vitreous film-coated formed part |
| JPH02298249A (en) * | 1990-04-14 | 1990-12-10 | Koyo Seiko Co Ltd | Method for carburizing shaft provided with keyway |
| WO2018159195A1 (en) * | 2017-02-28 | 2018-09-07 | 日本電気硝子株式会社 | Sealer, sealer application liquid, corrosion-resistant film, high-temperature member, and methods for producing same |
-
1981
- 1981-12-01 JP JP56191825A patent/JPS5893865A/en active Granted
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2017098854A1 (en) * | 2015-12-09 | 2017-06-15 | 日本電気硝子株式会社 | Sealer, sealer coating solution, corrosion resistant film, high temperature member, and method for manufacturing high temperature member |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS5893865A (en) | 1983-06-03 |
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