JPH0413857A - Formation of coating film having corrosion resistance to molten metal - Google Patents
Formation of coating film having corrosion resistance to molten metalInfo
- Publication number
- JPH0413857A JPH0413857A JP11285390A JP11285390A JPH0413857A JP H0413857 A JPH0413857 A JP H0413857A JP 11285390 A JP11285390 A JP 11285390A JP 11285390 A JP11285390 A JP 11285390A JP H0413857 A JPH0413857 A JP H0413857A
- Authority
- JP
- Japan
- Prior art keywords
- molten metal
- self
- carbide
- layer
- 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.)
- Granted
Links
- 229910052751 metal Inorganic materials 0.000 title claims abstract description 16
- 239000002184 metal Substances 0.000 title claims abstract description 16
- 230000007797 corrosion Effects 0.000 title claims abstract description 9
- 238000005260 corrosion Methods 0.000 title claims abstract description 9
- 239000011248 coating agent Substances 0.000 title abstract description 12
- 238000000576 coating method Methods 0.000 title abstract description 12
- 230000015572 biosynthetic process Effects 0.000 title 1
- 239000000956 alloy Substances 0.000 claims abstract description 16
- 229910045601 alloy Inorganic materials 0.000 claims abstract description 16
- 239000000463 material Substances 0.000 claims abstract description 14
- 238000005507 spraying Methods 0.000 claims abstract description 8
- 238000000034 method Methods 0.000 claims description 7
- 238000007751 thermal spraying Methods 0.000 abstract description 9
- 238000007789 sealing Methods 0.000 abstract description 4
- 230000004927 fusion Effects 0.000 abstract 1
- 239000011148 porous material Substances 0.000 abstract 1
- 230000002035 prolonged effect Effects 0.000 abstract 1
- 239000007921 spray Substances 0.000 description 3
- 238000005422 blasting Methods 0.000 description 2
- 239000011651 chromium Substances 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 150000001247 metal acetylides Chemical class 0.000 description 2
- 229910052759 nickel Inorganic materials 0.000 description 2
- MTPVUVINMAGMJL-UHFFFAOYSA-N trimethyl(1,1,2,2,2-pentafluoroethyl)silane Chemical compound C[Si](C)(C)C(F)(F)C(F)(F)F MTPVUVINMAGMJL-UHFFFAOYSA-N 0.000 description 2
- HCHKCACWOHOZIP-UHFFFAOYSA-N Zinc Chemical compound [Zn] HCHKCACWOHOZIP-UHFFFAOYSA-N 0.000 description 1
- 229910002091 carbon monoxide Inorganic materials 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- CMMUKUYEPRGBFB-UHFFFAOYSA-L dichromic acid Chemical compound O[Cr](=O)(=O)O[Cr](O)(=O)=O CMMUKUYEPRGBFB-UHFFFAOYSA-L 0.000 description 1
- 238000002844 melting Methods 0.000 description 1
- 230000008018 melting Effects 0.000 description 1
- FXNGWBDIVIGISM-UHFFFAOYSA-N methylidynechromium Chemical compound [Cr]#[C] FXNGWBDIVIGISM-UHFFFAOYSA-N 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 235000019353 potassium silicate Nutrition 0.000 description 1
- 239000002893 slag Substances 0.000 description 1
- NTHWMYGWWRZVTN-UHFFFAOYSA-N sodium silicate Chemical compound [Na+].[Na+].[O-][Si]([O-])=O NTHWMYGWWRZVTN-UHFFFAOYSA-N 0.000 description 1
- UONOETXJSWQNOL-UHFFFAOYSA-N tungsten carbide Chemical group [W+]#[C-] UONOETXJSWQNOL-UHFFFAOYSA-N 0.000 description 1
- 229910052725 zinc Inorganic materials 0.000 description 1
- 239000011701 zinc Substances 0.000 description 1
Landscapes
- Coating With Molten Metal (AREA)
- Coating By Spraying Or Casting (AREA)
- Other Surface Treatments For Metallic Materials (AREA)
- Preventing Corrosion Or Incrustation Of Metals (AREA)
Abstract
Description
【発明の詳細な説明】
〔産業上の利用分野〕
本発明は溶融金属浴中ロール等の耐久性向上のために行
う溶射処理において、自溶性合金溶射により基材との密
着性を高め、溶融金属耐食性の下地自溶性合金層を比較
的厚く溶射し、その上に溶融金属の濡れ性に優れる炭化
物層を薄（熔射し皮膜の耐久性を向上する二層溶射方法
に関するものである。Detailed Description of the Invention [Industrial Application Field] The present invention is applied to a thermal spraying treatment carried out to improve the durability of rolls, etc. in a molten metal bath. This method relates to a two-layer thermal spraying method in which a relatively thick base self-fluxing alloy layer with metal corrosion resistance is thermally sprayed, and a thin carbide layer with excellent wettability for molten metal is then thermally sprayed to improve the durability of the coating.
〔従来の技術及び発明が解決しようとする課題〕二層な
いし多層溶射の概念は従来からない訳ではないが、従来
は同一溶射法により成分変化を順次与え、外層皮膜の特
性を充分発揮させるものである。下地に自溶性合金層を
つくり、その上に特に薄い炭化物層を溶射し、溶融金属
耐食性皮膜を得る溶射方法については提案されていない
。[Prior art and problems to be solved by the invention] The concept of two-layer or multi-layer thermal spraying is not new, but conventionally the same thermal spraying method was used to sequentially change the composition in order to fully demonstrate the characteristics of the outer layer coating. It is. No proposal has been made regarding a thermal spraying method in which a self-fusing alloy layer is formed on the base and a particularly thin carbide layer is thermally sprayed on top of it to obtain a molten metal corrosion-resistant coating.
本発明は、ロール軸部品等の基材の表面に自溶性合金を
溶射しフュージング後、その上に主成分がＷＣ等の炭化
物である溶射材料を５〜１００μｍの厚さに射溶射する
ことを特徴とする溶融金属耐食性皮膜形成方法を要旨と
するものである。The present invention involves spraying a self-fusing alloy onto the surface of a base material such as a roll shaft component, fusing it, and then spraying a thermal spray material whose main component is a carbide such as WC to a thickness of 5 to 100 μm. The gist of this paper is a method for forming a molten metal corrosion-resistant film.
自溶性合金としては外層の炭化物層が侵されても耐食性
を発揮する成分のものが好ましく、ＷＭｏ、 Ｃｒおよ
びこれらの炭化物を含む自溶性合金がよい。当然自溶性
を与えるためにはＢ、Ｓｉ等を若干含むことになる。The self-fusing alloy preferably has a component that exhibits corrosion resistance even if the outer carbide layer is attacked, and self-fusing alloys containing WMo, Cr, and their carbides are preferred. Naturally, in order to provide self-solubility, a small amount of B, Si, etc. will be included.
自溶性合金のＷ１Ｍｏ＋ Ｃｒ等の含有量は好ましくは
いずれも２５％以下がよい。又Ｂ、Ｓｉはいずれも５％
以下が好ましい。Ｃは熔融金属中での接触摩耗を少なく
するため、又炭化物形成のため最大１．５％まで含むこ
とができる。合金ベース成分としてはＣｏ系が良く、こ
れに若干のＮｉを含有する自溶性合金を使用する。皮膜
厚さは溶融金属に対する腐食時間を長くするために、比
較的厚くする。The content of W1Mo+Cr, etc. in the self-fluxing alloy is preferably 25% or less. Also, B and Si are both 5%
The following are preferred. C can be included up to 1.5% to reduce contact wear in the molten metal and to form carbides. The alloy base component is preferably Co-based, and a self-fluxing alloy containing a small amount of Ni is used. The coating thickness is made relatively thick in order to prolong the corrosion time for molten metal.
好ましくは５００ｐ以上の厚さにとるのがよい。Preferably, the thickness is 500p or more.
フュージングの温度としては、自溶性合金の溶融温度の
直上に加熱して行う。この場合形成されるｓ、ｉｏ２．
Ｂ２Ｏ３等の表面のスラグは上層炭化物溶射のために
、ショツトブラスト等で除去する。Fusing is carried out at a temperature just above the melting temperature of the self-fusing alloy. In this case formed s, io2.
Surface slag such as B2O3 is removed by shot blasting or the like for upper layer carbide spraying.
炭化物層の溶射は自溶性合金層のショツトブラスト面に
密着し、大きい密着強度を示す材料が必要である。従っ
て、１００％炭化物の溶射材料の他、若干の結合用金属
を含む炭化物系溶射材料を使用する。金属成分としては
２０％以下のＣｏ、 Ｎｉ等が好ましい。しかしこれら
の金属成分が過量の場合には、炭化物層の効果がなくな
るので注意しなければならない。又炭化物層が厚くなる
と剥離し易くなり、密着強度の低下を起こすので本発明
では炭化物層の皮膜厚さを特に薄く５〜１００μｍとす
る。炭化物としてはタングステン炭化物（ＷＣ） 。Thermal spraying of a carbide layer requires a material that adheres closely to the shot-blasted surface of the self-fusing alloy layer and exhibits high adhesion strength. Therefore, in addition to the 100% carbide spray material, a carbide spray material containing some bonding metal is used. As the metal component, 20% or less of Co, Ni, etc. is preferable. However, if these metal components are present in excessive amounts, the effect of the carbide layer will be lost, so care must be taken. Further, if the carbide layer becomes thick, it becomes easy to peel off and the adhesion strength decreases, so in the present invention, the film thickness of the carbide layer is particularly thin, 5 to 100 μm. The carbide is tungsten carbide (WC).
クロム炭化物（ＣｒＣ） 、チタン炭化物（ＴｉＣ）等
を使用することが可能で、用途によってはこれらを併用
しても良い。Chromium carbide (CrC), titanium carbide (TiC), etc. can be used, and depending on the application, these may be used in combination.
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.
本実施例ではロール表面にＷ１３％、Ｃｒ１９％Ｃ１，
４％、Ｓｉ３．５％、８３％、残部Ｎｉ又はＣＯ等より
なる自溶性合金を溶射し、フュージング、ショツトブラ
スト後、その上にＷＣ８８％の託系溶射材を１５μｍ厚
さに高速ガス溶射法で吹付た。これをＷＣ系溶射皮膜の
ない場合の溶融亜鉛浴中での耐久寿命と比較したが、使
用可能期間が約３倍に向上した（同程度の損傷のものと
の比較）。In this example, the roll surface has W13%, Cr19%C1,
After thermal spraying a self-fusing alloy consisting of 4% Si, 3.5% Si, 83% Ni or CO, etc., fusing and shot blasting, a high-speed gas spraying material of 88% WC was applied on top to a thickness of 15 μm. Sprayed with. This was compared with the durability life in a molten zinc bath without a WC sprayed coating, and the usable life was approximately three times longer (compared to a product with the same degree of damage).
第１図は本発明の実施の態様を示す説明図で、本発明に
より溶融金属耐食性皮膜を形成されたロールの部分拡大
図を示す。図において１はりＣ等の炭化物系皮膜、２は
自溶性合金皮膜、３はロール本体である。FIG. 1 is an explanatory diagram showing an embodiment of the present invention, and shows a partially enlarged view of a roll on which a molten metal corrosion-resistant coating is formed according to the present invention. In the figure, 1 is a carbide coating such as beam C, 2 is a self-fusing alloy coating, and 3 is a roll body.
又ロール材上にＷＣ系材料のみで１５μｍ溶射したもの
は溶射層のないロール材に比較して、耐用期間は約２倍
に向上したに過ぎなかった。Furthermore, when the roll material was thermally sprayed with only the WC material to a thickness of 15 μm, the service life was only about twice as long as that of the roll material without a thermally sprayed layer.
（発明の効果）
前記の如く、本発明によれば溶融金属浴中ロール等の耐
久寿命を著しく延長することができるので、その工業上
の利用価値は大きいといえる。(Effects of the Invention) As described above, according to the present invention, the durability life of rolls, etc. in a molten metal bath can be significantly extended, so it can be said that the present invention has great industrial utility value.
尚、ＷＣ系溶射層の上に封孔処理を行うことにより使用
寿命をより長く出来る。封孔処理剤としては水ガラス系
の材料１重クロム酸材料等があり、封孔処理を併用する
溶射方法も本発明に含まれるものである。Incidentally, by performing a sealing treatment on the WC sprayed layer, the service life can be made longer. Examples of the sealing agent include water glass-based materials, dichromic acid materials, and the like, and a thermal spraying method that uses a sealing treatment in combination is also included in the present invention.
第１図は本発明の実施の態様を示す説明図である。
図において１はＷＣ等の炭化物系皮膜、２は自溶性合金
皮膜、３はロール本体である。
特許出願人 日鉄ハード株式会社FIG. 1 is an explanatory diagram showing an embodiment of the present invention. In the figure, 1 is a carbide coating such as WC, 2 is a self-fusing alloy coating, and 3 is a roll body. Patent applicant Nippon Steel Hard Co., Ltd.
Claims (1)
フュージング後、その上に主成分がＷＣ等の炭化物であ
る溶射材料を５〜１００μｍの厚さに射溶射することを
特徴とする溶融金属耐食性皮膜形成方法。It is characterized by spraying a self-fusing alloy onto the surface of a base material such as a roll shaft part, fusing it, and then spraying a spraying material whose main component is a carbide such as WC to a thickness of 5 to 100 μm. Method for forming molten metal corrosion-resistant film.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP11285390A JP2949443B2 (en) | 1990-04-28 | 1990-04-28 | Method for forming molten metal corrosion resistant film |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP11285390A JP2949443B2 (en) | 1990-04-28 | 1990-04-28 | Method for forming molten metal corrosion resistant film |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0413857A true JPH0413857A (en) | 1992-01-17 |
| JP2949443B2 JP2949443B2 (en) | 1999-09-13 |
Family
ID=14597168
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP11285390A Expired - Lifetime JP2949443B2 (en) | 1990-04-28 | 1990-04-28 | Method for forming molten metal corrosion resistant film |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2949443B2 (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH06117537A (en) * | 1992-10-01 | 1994-04-26 | Hitachi Zosen Corp | Piston ring |
| US5316859A (en) * | 1992-03-30 | 1994-05-31 | Tocalo Co., Ltd. | Spray-coated roll for continuous galvanization |
| US5397650A (en) * | 1991-08-08 | 1995-03-14 | Tocalo Co., Ltd. | Composite spray coating having improved resistance to hot-dip galvanization |
| US5472793A (en) * | 1992-07-29 | 1995-12-05 | Tocalo Co., Ltd. | Composite spray coating having improved resistance to hot-dip galvanization |
| US6129994A (en) * | 1995-03-08 | 2000-10-10 | Tocalo Co., Ltd. | Member having composite coating and process for producing the same |
| JP2005272998A (en) * | 2004-03-23 | 2005-10-06 | Hokkaido | Parts thermally sprayed with self-fluxing alloy which does not exfoliate |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP5019948B2 (en) * | 2007-05-23 | 2012-09-05 | 日鉄ハード株式会社 | Roll with excellent pressure resistance |
-
1990
- 1990-04-28 JP JP11285390A patent/JP2949443B2/en not_active Expired - Lifetime
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5397650A (en) * | 1991-08-08 | 1995-03-14 | Tocalo Co., Ltd. | Composite spray coating having improved resistance to hot-dip galvanization |
| US5316859A (en) * | 1992-03-30 | 1994-05-31 | Tocalo Co., Ltd. | Spray-coated roll for continuous galvanization |
| US5472793A (en) * | 1992-07-29 | 1995-12-05 | Tocalo Co., Ltd. | Composite spray coating having improved resistance to hot-dip galvanization |
| JPH06117537A (en) * | 1992-10-01 | 1994-04-26 | Hitachi Zosen Corp | Piston ring |
| US6129994A (en) * | 1995-03-08 | 2000-10-10 | Tocalo Co., Ltd. | Member having composite coating and process for producing the same |
| JP2005272998A (en) * | 2004-03-23 | 2005-10-06 | Hokkaido | Parts thermally sprayed with self-fluxing alloy which does not exfoliate |
| JP4565434B2 (en) * | 2004-03-23 | 2010-10-20 | 地方独立行政法人北海道立総合研究機構 | Self-fluxing alloy sprayed parts that do not peel |
Also Published As
| Publication number | Publication date |
|---|---|
| JP2949443B2 (en) | 1999-09-13 |
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