CN104593713A - Preparation method for tension-roller thermal-sprayed coating - Google Patents
Preparation method for tension-roller thermal-sprayed coating Download PDFInfo
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- CN104593713A CN104593713A CN201310521480.1A CN201310521480A CN104593713A CN 104593713 A CN104593713 A CN 104593713A CN 201310521480 A CN201310521480 A CN 201310521480A CN 104593713 A CN104593713 A CN 104593713A
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- tensioning roller
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- 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
- C23C4/04—Coating by spraying the coating material in the molten state, e.g. by flame, plasma or electric discharge characterised by the coating material
- C23C4/10—Oxides, borides, carbides, nitrides or silicides; Mixtures thereof
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- 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
- C23C4/18—After-treatment
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- Chemical Kinetics & Catalysis (AREA)
- Materials Engineering (AREA)
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- Application Of Or Painting With Fluid Materials (AREA)
- Coating By Spraying Or Casting (AREA)
Abstract
The invention discloses a preparation method for a tension-roller thermal-sprayed coating. The method comprises: firstly pre-treating the surface of a tension roller to reach thermal spraying requirements; employing a WC-Co, WC-CoCr, WC-NiCr or WC-Ni powder material to perform thermal spraying processing under certain parameter conditions, so as to obtain a coating with the thickness of 0.2 mm or more; employing epoxy resin and a curing agent, mixing according to a ratio, then coating the surface of the tension roller coating with the mixture, and placing for 24 h or drying at 100-120 DEG C for 2-3 h; employing a whetstone or diamond abrasive belt to perform polishing processing on the coating surface; and performing texturing processing on the tension-roller surface by employing sand grains with different particle size according to the different roughness finally needed by the tension roller, so as to obtain the tension-roller coating surface with different roughness. The prepared tension-roller thermal-sprayed coating possesses excellent wear resistance, shock resistance and roughness retention capability, is strong in surface foreign-matter adhesion resistance, satisfies practical production usage requirements of a tension roller, and helps to improve the quality of strip steel products.
Description
Technical field
The present invention relates to a kind of preparation method of tensioning roller hot spray coating.
Background technology
Hot spray coating, owing to having very high cost performance, has obtained and has applied more and more widely, particularly in steel industry.On cold rolling of strip steel tinuous production, tensioning roller One's name is legion, tensioning roller adopts hot spray coating can significantly improve the performances such as its wear resistance, shock resistance, erosion resistance.In cold rolling of strip steel continuous seepage, tensioning roller directly contacts with the strip, and the performance on its surface guarantees the important factor of belt steel product quality, therefore also improves constantly the requirement of tensioning roller surface property.Current hot spray coating has been widely used in the improvement of tensioning roller surface property, and on the one hand because hot spray coating is comparatively hard, therefore, tensioning roller roll surface wearing amount is little, comparatively wear-resisting, long service life; But then because hot spray coating is comparatively hard, amplified from roll surface microcosmic especially, surface is spike pattern, therefore in actual use, tensioning roller easily causes scraping to belt steel surface, make the scrape of belt steel surface stick to tensioning roller surface, form the foreign matter adhesion defects of tensioning roller.Foreign matter adhesion defects not only can cause tensioning roller roll surface roughness to reduce, and makes tensioning roller not have the effect providing some tension of original design, causes band steel to skid.Meanwhile, foreign matter adheres to and belt steel surface also can be caused to form certain defect, as roll marks, stain, some scuffing, cut etc., has a strong impact on the quality of belt steel product.Therefore, original only carries out on tensioning roller surface the service requirements that thermospray one deck coating can not meet current tensioning roller, more needs the anti-foreign matter adhesive capacity improving tensioning roller hot spray coating.
Summary of the invention
Technical problem to be solved by this invention is to provide a kind of preparation method of tensioning roller hot spray coating, tensioning roller hot spray coating prepared by present method has excellent over-all properties, excellent wear resisting property, shock resistance and roughness retaining capability, its resistance to surface foreign matter adhesion property is strong, meet the requirement that tensioning roller uses in actual production, improve the quality of belt steel product.
For solving the problems of the technologies described above, the preparation method of tensioning roller hot spray coating of the present invention comprises the steps:
Step one, carry out pre-treatment to tensioning roller surface, surface residual oil stain and moisture are removed in heating, and roll surface carries out sandblast texturing process, reaches even surface roughness, no-reflection;
Step 2, thermal spraying treatment is carried out to tensioning roller surface, hot spray coating powder body material adopts the one in WC-Co, WC-CoCr, WC-NiCr or WC-Ni, thermal spray parameters is oxygen flow 850-950 liter/min, kerosene oil flow 0.28-0.35 liter/min, spray distance 300-500mm, for powder speed 50-100 gram/minute, the coat-thickness >=0.2mm obtained;
Step 3, sealing treatment is carried out to tensioning roller top coat, epoxy resin and solidifying agent are pressed the mass ratio configuration of 100:40, stir, adopt hairbrush directly to apply or adopt gun spraying to be coated on tensioning roller coatingsurface, apply rear placement 24 hours or dry 2-3h at 100-120 DEG C of temperature;
Step 4, rubbing down process is carried out to tensioning roller coatingsurface, adopt whetslate or diamond abrasive band, by tensioning roller coatingsurface coating roughness rubbing down to Ra0.5-1.5;
Step 5, to tensioning roller coatingsurface frosting treatment, needed for final tensioning roller, roughness is different, the sand grains of different-grain diameter is adopted to carry out frosting treatment to tensioning roller roll surface, obtain the different roughness of tensioning roller coatingsurface, the blasting pressure of frosting treatment is 0.45-0.55MPa, and sandblasting distance is 300-500mm.
Further, above-mentioned epoxy resin is diethylene glycol ether bisphenol A type epoxy resin, and described solidifying agent is polyglycol ether diamines.
Further, above-mentioned sand grains is Brown Alundum sand grains or white fused alumina sand grains.
Because the preparation method of tensioning roller hot spray coating of the present invention have employed technique scheme, namely first present method carries out pre-treatment to tensioning roller surface, to reach thermospray requirement; Adopt WC-Co, WC-CoCr, WC-NiCr or WC-Ni powder body material to carry out thermal spraying treatment under certain parameter, obtain coat-thickness >=0.2mm; Be coated on tensioning roller coatingsurface after adopting epoxy resin and solidifying agent to configure in proportion to place 24 hours or dry 2-3h at 100-120 DEG C of temperature; Whetslate or diamond abrasive band is adopted to carry out rubbing down process to coatingsurface; Needed for final tensioning roller, roughness is different, adopts the sand grains of different-grain diameter to carry out frosting treatment to tensioning roller roll surface, obtains the different roughness of tensioning roller coatingsurface.Tensioning roller hot spray coating prepared by present method has excellent over-all properties, excellent wear resisting property, shock resistance and roughness retaining capability, its resistance to surface foreign matter adhesion property is strong, meets the requirement that tensioning roller uses in actual production, improves the quality of belt steel product.
Accompanying drawing explanation
Below in conjunction with drawings and embodiments, the present invention is described in further detail:
Fig. 1 is the surface topography microgram of the direct hot spray coating of tensioning roller;
Fig. 2 is the surface topography microgram of the tensioning roller hot spray coating adopting present method to obtain.
Embodiment
The preparation method of tensioning roller hot spray coating of the present invention comprises the steps:
Step one, carry out pre-treatment to tensioning roller surface, surface residual oil stain and moisture are removed in heating, and roll surface carries out sandblast texturing process, reaches even surface roughness, no-reflection;
Step 2, thermal spraying treatment is carried out to tensioning roller surface, hot spray coating powder body material adopts the one in WC-Co, WC-CoCr, WC-NiCr or WC-Ni, thermal spray parameters is oxygen flow 850-950 liter/min, kerosene oil flow 0.28-0.35 liter/min, spray distance 300-500mm, for powder speed 50-100 gram/minute, the coat-thickness >=0.2mm obtained;
Step 3, sealing treatment is carried out to tensioning roller top coat, epoxy resin and solidifying agent are pressed the mass ratio configuration of 100:40, stir, adopt hairbrush directly to apply or adopt gun spraying to be coated on tensioning roller coatingsurface, apply rear placement 24 hours or dry 2-3h at 100-120 DEG C of temperature;
Step 4, rubbing down process is carried out to tensioning roller coatingsurface, adopt whetslate or diamond abrasive band, by tensioning roller coatingsurface coating roughness rubbing down to Ra0.5-1.5;
Step 5, to tensioning roller coatingsurface frosting treatment, needed for final tensioning roller, roughness is different, the sand grains of different-grain diameter is adopted to carry out frosting treatment to tensioning roller roll surface, obtain the different roughness of tensioning roller coatingsurface, the blasting pressure of frosting treatment is 0.45-0.55MPa, and sandblasting distance is 300-500mm.As needed roughness Ra 2-3,80# sand grains can be adopted; Need roughness Ra 3-4,60# sand grains can be adopted, need roughness Ra 4-5,46# sand grains can be adopted, need roughness Ra 5-7,36# sand grains can be adopted.
Further, above-mentioned epoxy resin is diethylene glycol ether bisphenol A type epoxy resin, and described solidifying agent is polyglycol ether diamines.
Further, above-mentioned sand grains is Brown Alundum sand grains or white fused alumina sand grains.
Present method is first at the certain thickness thermally sprayed coating of tensioning roller thermal spraying on surface, thus make tensioning roller surface possess excellent wear resisting property, secondly tensioning roller top coat is carried out sealing treatment, encapsulant penetrates in coat inside hole, the combination good with coating formation, makes coating be unlikely to produce localized delamination in the process of follow-up sandblasting rubbing down; Again by tensioning roller surface rubbing down to Ra0.5-1.5, removal has sprayed the spike pattern of rear coatingsurface; Finally by the texturing of tensioning roller surface sand-blasting to required roughness requirements, form new surface topography.New surface topography is compared with original spraying state surface topography, and crest height difference reduces, and crest wedge angle is rounder and more smooth, but roughness reaches the requirement of tensioning roller design.
If band steel and tensioning roller pressure are P, in unit surface, point of contact is n, if crest height difference reduces, the spacing of crest become evenly, lofty cusp reduces, then unit surface point of contact n becomes large, be then distributed to each point of contact pressure P/n and diminish, reduce so swipe with belt steel surface in tensioning roller surface, bur reduces.Crest wedge angle is rounder and more smooth, also can reduce surface scraping simultaneously.The tensioning roller adopting present method to prepare, not only maintains the antiwear characteristic of original hot spray coating, and new surface topography, more resistance to foreign matter adheres to, and makes roughness retentivity better, reduces because foreign matter adheres to the steel strip surface defect caused.And adopt the technological operation of present method and produce very easy, process controllability is very good.
Coupons is hung up in tensioning roller edge, wherein a kind of hot spray coating is complete directly takes off (comparison cases) afterwards, take off (case study on implementation) after another kind is disposed by present method, micro-hardness testing, falling-ball impact test (5g steel ball are carried out to two kinds of samples, 500 balls are each, 3m stroke), the service check test such as surface roughness Ra; Comparative result sees the following form, and its surface topography is as Fig. 1 and Fig. 2.
| Sequence number | Case | Coating hardness | Shock resistance | Ra | Surface topography |
| 1 | Comparison cases sample | HV1000~1200 | ≥20 | 3.5~4.5 | Difference |
| 2 | Case study on implementation sample | HV1000~1200 | ≥20 | 3.5~4.5 | Good |
From case study on implementation and comparison cases evaluation result, present method prepares the microhardness of sample, impact property is suitable with simple hot spray coating with Ra value; But although Ra value is suitable, from the surface topography of coating, the specimen surface pattern of present method is adopted obviously to be better than simple hot spray coating.As can be seen from Fig. 1 and Fig. 2 obviously, although two kinds of sample Ra values are substantially suitable, case study on implementation coating morphology is comparatively even, and its Wave crest and wave trough is alternately distributed, and amplitude is comparatively even, and crest height difference is less, and spacing is even.From surface topography, when being with steel 1 to contact with specimen surface 2, then the point of contact n of comparison cases in Fig. 1
1be about 8, and the point of contact n of case study on implementation in Fig. 2
2be about 27; When being with the pressure P of steel and sample to fix, obviously known, the pressure that case study on implementation is distributed to suffered by each point of contact than comparison cases is much little.Therefore, after taking present method to prepare tensioning roller top coat, its surface contacts with the strip more even, surface scraping reduces, bur reduces, and effectively can keep that hot spray coating is original wear-resistingly waits attribute preferably, and adopt present method can multiple different roughness requirement needed for acquisition easily and effectively.
The present invention is only better possible embodiments of the present invention using tensioning roller as routine solution, not thereby namely limits to the scope of the claims of the present invention, and the present invention can also be used for other occasions needing Surface hardening treatment.I.e. equivalence change described in every application description of the present invention, is all included within the scope of the present invention.
Claims (3)
1. a preparation method for tensioning roller hot spray coating, is characterized in that present method comprises the steps:
Step one, carry out pre-treatment to tensioning roller surface, surface residual oil stain and moisture are removed in heating, and roll surface carries out sandblast texturing process, reaches even surface roughness, no-reflection;
Step 2, thermal spraying treatment is carried out to tensioning roller surface, hot spray coating powder body material adopts the one in WC-Co, WC-CoCr, WC-NiCr or WC-Ni, thermal spray parameters is oxygen flow 850-950 liter/min, kerosene oil flow 0.28-0.35 liter/min, spray distance 300-500mm, for powder speed 50-100 gram/minute, the coat-thickness >=0.2mm obtained;
Step 3, sealing treatment is carried out to tensioning roller top coat, epoxy resin and solidifying agent are pressed the mass ratio configuration of 100:40, stir, adopt hairbrush directly to apply or adopt gun spraying to be coated on tensioning roller coatingsurface, apply rear placement 24 hours or dry 2-3h at 100-120 DEG C of temperature;
Step 4, rubbing down process is carried out to tensioning roller coatingsurface, adopt whetslate or diamond abrasive band, by tensioning roller coatingsurface coating roughness rubbing down to Ra0.5-1.5;
Step 5, to tensioning roller coatingsurface frosting treatment, needed for final tensioning roller, roughness is different, the sand grains of different-grain diameter is adopted to carry out frosting treatment to tensioning roller roll surface, obtain the different roughness of tensioning roller coatingsurface, the blasting pressure of frosting treatment is 0.45-0.55MPa, and sandblasting distance is 300-500mm.
2. the preparation method of tensioning roller hot spray coating according to claim 1, is characterized in that: described epoxy resin is diethylene glycol ether bisphenol A type epoxy resin, and described solidifying agent is polyglycol ether diamines.
3. the preparation method of tensioning roller hot spray coating according to claim 1, is characterized in that: described sand grains is Brown Alundum sand grains or white fused alumina sand grains.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310521480.1A CN104593713B (en) | 2013-10-30 | 2013-10-30 | The preparation method of jockey pulley hot-spraying coating |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201310521480.1A CN104593713B (en) | 2013-10-30 | 2013-10-30 | The preparation method of jockey pulley hot-spraying coating |
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| CN104593713A true CN104593713A (en) | 2015-05-06 |
| CN104593713B CN104593713B (en) | 2018-08-17 |
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| CN201310521480.1A Active CN104593713B (en) | 2013-10-30 | 2013-10-30 | The preparation method of jockey pulley hot-spraying coating |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111805435A (en) * | 2020-07-17 | 2020-10-23 | 合肥微睿光电科技有限公司 | Surface treatment method of metal base for PECVD (plasma enhanced chemical vapor deposition) process |
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| US5418012A (en) * | 1993-11-04 | 1995-05-23 | The Babcock & Wilcox Company | Conversion coatings on silicon carbide |
| CN101134868A (en) * | 2006-08-31 | 2008-03-05 | 上海宝钢设备检修有限公司 | Hot spraying coating sealing reagent and using method thereof |
| CN101362151A (en) * | 2008-09-12 | 2009-02-11 | 上海君山表面技术工程股份有限公司 | Hard-surface build-up welding strain roller and manufacture method thereof |
| CN102212772A (en) * | 2011-05-24 | 2011-10-12 | 德清县武康镇创智热喷涂厂 | Method for preparing thermally sprayed ceramic coating of plunger of high-pressure cleaning machine |
| CN102816990A (en) * | 2011-06-09 | 2012-12-12 | 中国钢铁股份有限公司 | Hole sealant for spraying coatings and hole sealing method |
-
2013
- 2013-10-30 CN CN201310521480.1A patent/CN104593713B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5418012A (en) * | 1993-11-04 | 1995-05-23 | The Babcock & Wilcox Company | Conversion coatings on silicon carbide |
| CN101134868A (en) * | 2006-08-31 | 2008-03-05 | 上海宝钢设备检修有限公司 | Hot spraying coating sealing reagent and using method thereof |
| CN101362151A (en) * | 2008-09-12 | 2009-02-11 | 上海君山表面技术工程股份有限公司 | Hard-surface build-up welding strain roller and manufacture method thereof |
| CN102212772A (en) * | 2011-05-24 | 2011-10-12 | 德清县武康镇创智热喷涂厂 | Method for preparing thermally sprayed ceramic coating of plunger of high-pressure cleaning machine |
| CN102816990A (en) * | 2011-06-09 | 2012-12-12 | 中国钢铁股份有限公司 | Hole sealant for spraying coatings and hole sealing method |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111805435A (en) * | 2020-07-17 | 2020-10-23 | 合肥微睿光电科技有限公司 | Surface treatment method of metal base for PECVD (plasma enhanced chemical vapor deposition) process |
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| CN104593713B (en) | 2018-08-17 |
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Address after: No. 3520 Tongji Road, Baoshan District, Shanghai, 201900 Patentee after: Baowu equipment Intelligent Technology Co., Ltd Address before: 201900, 335, Pu Pu Road, Shanghai, Baoshan District Patentee before: SHANGHAI BAOSTEEL INDUSTRY TECHNOLOGICAL SERVICE Co.,Ltd. |
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