CN101362152B - Intermediate-frequency quenching hard-surface strain roller manufacture method - Google Patents
Intermediate-frequency quenching hard-surface strain roller manufacture method Download PDFInfo
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- CN101362152B CN101362152B CN2008100429115A CN200810042911A CN101362152B CN 101362152 B CN101362152 B CN 101362152B CN 2008100429115 A CN2008100429115 A CN 2008100429115A CN 200810042911 A CN200810042911 A CN 200810042911A CN 101362152 B CN101362152 B CN 101362152B
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- induction hardening
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Abstract
The invention relates to a tension roller used in a cold rolling production line, in particular to a tension roller with a mid-frequency quenching hard surface, and a manufacturing method thereof. The tension roller comprises a roller and round side covers which are fixedly and closely covered at the openings of the two ends of the roller, and the circle centers of the two side covers are in coupling connection with a left axle head and a right axle head respectively. The tension roller is characterized in that: the outer surface of the roller is covered with a spaying layer, the outsides of the two side covers are provided with concave grooves in a surrounding way, the concave groove is internally provided with a through hole communicated with the interior of the roller; the spaying layer adopts the functional metal ceramic coating which is composed of compound metal ceramics of WC/Co metal ceramics and metal or alloy. The tension roller mainly solves the technical problems that the existing product roller surface is sprayed with hard chromium plating on the outer surface and is easy to be pressed into concave pits or protuberances by sundries such as ferric oxide, etc. When in use, drawing stamps or stains are formed on the surface of the finished product, the band steel, thus influencing the surface quality of the band steel, and the tension roller is beneficial to radiating the interior of the roller when in use.
Description
Technical field
The jockey pulley that the present invention relates to use on the rolling mill production line, particularly a kind of mid frequency induction hardening hard-surface strain roller and manufacture method thereof.
Background technology
Operation along with the precious Japanese automobile plate of Baosteel rolling mill production line, the high-grade Automobile Plate of producing high added value has been widely used in the Shanghai Volkswagen, Shanghai GM and FAW-Volkswagen, sedan-making plants such as Huachen BMW, domestic increasing iron and steel manufacturing enterprise will be a template with the precious Japanese automobile plate of Baosteel rolling mill production line, set up the rolling mill production line of high-end product, as Baosteel five cold rolling CAPL and CGL production line is present domestic and external state-of-the-art rolling mill production line, the high-grade Automobile Plate of main production, quality requirement to belt steel surface is more and more higher, and the speed of service of band steel is also more and more faster, and is therefore also more and more higher to the requirement of all rollers on the production line.Existing jockey pulley and slewing rollers are generally the roll bending welding rolls, roll surface does not have the hardness requirement, and at outer surface spraying hard chrome plating, in use foreign material such as easy oxidized iron are pressed into pit or projection, draw trace or trace in the formation of finished strip surface, the surface quality of influence band steel.
In addition, after the tested cap seal in roller two ends of existing jockey pulley closes, gather heat in the roller easily in process of production, be unfavorable for that jockey pulley uses for a long time, and influence its service life easily.
Summary of the invention
The object of the present invention is to provide a kind of mid frequency induction hardening hard-surface strain roller and manufacture method thereof, mainly solve existing product roll surface and spray hard chrome plating at outer surface, in use foreign material such as easy oxidized iron are pressed into pit or projection, draw trace or trace in the formation of finished strip surface, the technical problem of the surface quality of influence band steel, and help in use to dispelling the heat in the roller.
For addressing the above problem, the present invention is achieved in that
A kind of mid frequency induction hardening hard-surface strain roller, it comprises that roller and fixed sealing are placed on the circular side cover of roller both ends open, two side cover circle centre positions be coupling respectively left spindle nose and right spindle nose, it is characterized in that: be coated with sprayed coating on this roller outer surface, two side cover outer rings are provided with groove, have the through hole that is communicated with in the roller in this groove; The functional metal-cermic coating that this sprayed coating uses, the composite cermet that it is made up of WC/Co cermet and metal or alloy constitutes; Wherein WC/Co cermet composition is as shown in the table:
This composite cermet, it is the mixed-powder that in above-mentioned WC cermet, mixes metal or alloy again, adopt churned mechanically mode to mix, wherein the WC cermet accounts for 80～100% of integral body, and Ni or NiCr alloy or NiCrFe alloy or Ni60 series alloy account for 0～20%.
WC is the hard phase in the WC/Co cermet, and Co is the bonding phase.The WC particle of hardness height, stable chemical performance is by the bonding of Co, and disperse is distributed in the metal-cermic coating, has played the effect of dispersion-strengtherning, thereby has improved the coating abrasion resistance properties.The adding of metal or alloy can further improve compactness, toughness and the decay resistance of coating, and can play a role to keeping the constant of roughness.
Advanced HVAF system has been adopted in the preparation of this metal-cermic coating, and by selecting for use following technological parameter can prepare the good composite cermet coating of abrasion resistance properties.
Its technological parameter is:
| Spray distance | 330～400mm |
| Oxygen flow, pressure | 1700～2200 +25scfh，180～230psi |
| Fuel flow, pressure | 4～8gph，140～190psi |
| Auxilliary throughput, pressure | 14～30scfh，40～70psi |
| Powder feeding rate | 30～90g/min |
| The gun barrel size | 4 cun or 6 cun or 8 cun |
The characteristics of this method are:
(1) the flame flame flow velocity degree and the particle rapidity height of HVAF, flame flow velocity degree can reach 1500～2000m/min, and under its heating and acceleration, powder particle speed can reach 400～600m/min;
(2) because the particle speed height has reduced the oxidation of element in the powder particle thus, the oxide content in the coating is few; Simultaneously, can obtain very high bond strength (〉 70MPa during spray metal-pottery); The coating that forms has compression, coating densification, the porosity low (＜1%);
(3) the flame flow diameter is little, energy-intensive, and powder particle is heated evenly in gun barrel, and 80% particle can effectively be accelerated at a high speed; Because flame temperature is low, avoid the decomposition decarburization of carbide material simultaneously, guaranteed the WC content and the coating premium properties of coating.
Described mid frequency induction hardening hard-surface strain roller is characterized in that: this through-bore axis is 15 ° to 45 ° in the roller axis angle.
Described mid frequency induction hardening hard-surface strain roller is characterized in that: two ends, the two side covers outside have chamfering, and two side covers are by chamfered section and the welding of roller two ends inwall.
Described mid frequency induction hardening hard-surface strain roller is characterized in that: be respectively equipped with square steel in these roller two ends, two side covers are set up on the square steel.
By technique scheme, the present invention has following advantage:
1, the present invention has improved the hardness of roll surface by at roller surface spraying sprayed coating, can avoid in use foreign material such as oxidized iron to be pressed into pit or projection, forms on the finished strip surface and draws trace or trace.
2, the side cover outer ring of roller of the present invention is provided with groove, has the through hole that is communicated with in the roller in this groove, can in use guarantee like this to communicate with the external world in the cylinder, helps discharging the hot gas in the roller, and has prolonged the service life of product.
Description of drawings
Fig. 1 is a structural representation of the present invention.
Fig. 2 is side cover and a roller Welding Structure schematic diagram among the present invention.
Among the figure:
1-roller;
21,22-side cover;
211,221-groove;
212,222-through hole;
213,223-chamfering;
3-left spindle nose;
4-right spindle nose;
5-square steel;
6-sprayed coating.
The specific embodiment
See also Fig. 1,2, the invention discloses a kind of mid frequency induction hardening hard-surface strain roller.As shown in the figure: it comprises that two ends, circular side cover 21,22, two side covers, 21,22 outside that roller 1 and fixed sealing are placed on roller 1 both ends open have chamfering 213,223, two side covers 21,22 by 213,223 ones of chamferings and roller 1 two ends inwall weldering.Being respectively equipped with square steel 5, two side covers 21,22 in these roller 1 two ends is set up on the square steel 5.Two side covers, 21,22 circle centre positions be coupling respectively left spindle nose 3 and right spindle nose 4.Be coated with sprayed coating 6, two side covers 21,22 outer rings on this roller 1 outer surface and be provided with groove 211,221, have the through hole 212,222 that is communicated with in the roller 1 in this groove 211,221, these through hole 212,222 axis are 15 ° to 45 ° in roller 1 axis angle.The matrix hardness HRC48 of roller 1～53, the roll surface specification requirement is: 1. weld seam flawless, pore and slag inclusion; After the roll surface grinding no grinding feed lines and the vibration lines; 3. spraying back spray-on coating roughness, thickness, Vickers hardness are in the drawing claimed range.
The manufacture method of described mid frequency induction hardening hard-surface strain roller comprises the steps:
A roller embryo forges;
The roughing of B roller embryo;
The modifier treatment of C roller embryo;
D assembles special tooling;
The mid frequency induction hardening of E roll surface;
The assembling of F roller;
The fine finishining of G roller;
The H roll surface cleans, preheating;
I roll surface sandblast texturing;
The spraying of J roll surface;
K roll surface rubbing down deglitch is handled.
Described step J uses the HVAF system, and its technological parameter is:
| Spray distance | 330～400mm |
| Oxygen flow, pressure | 1700～2200 +25scfh，180～230psi |
| Fuel flow, pressure | 4～8gph，140～190psi |
| Auxilliary throughput, pressure | 14～30scfh，40～70psi |
| Powder feeding rate | 30～90g/min |
| The gun barrel size | 4 cun or 6 cun or 8 cun |
Described step D is with increasing intermediate heat-treatment technology before the E, i.e. modifier treatment HB240-260, fining metal tissue is eliminated forging stress, improves body of roll comprehensive mechanical performance, effectively reduce after the deflection of its mid frequency induction hardening.
Described step D and E guarantee mid frequency induction hardening induction coil equidistant to roll surface, the uniformity of hardness after guaranteeing to quench by tool structure; In quenching process, workpiece moves with respect to mid frequency induction hardening induction coil spiral, has avoided the generation of soft band; Use the quenching supply frequency (general frequency 2500HZ) of 6000～8000HZ, reduced the amount of contraction of the body of roll in quenching process.
Being preferred embodiment of the present invention only in sum, is not to be used for limiting practical range of the present invention.Be that all equivalences of doing according to the content of the present patent application claim change and modification, all should be technology category of the present invention.
Claims (7)
1. the manufacture method of a mid frequency induction hardening hard-surface strain roller, it comprises that roller and fixed sealing are placed on the circular side cover of roller both ends open, two side cover circle centre positions be coupling respectively left spindle nose and right spindle nose, it is characterized in that: be coated with sprayed coating on this roller outer surface, two side cover outer rings are provided with groove, have the through hole that is communicated with in the roller in this groove; The functional metal-cermic coating that this sprayed coating uses, the composite cermet that it is made up of WC/Co cermet and metal or alloy constitutes; Wherein WC/Co cermet composition is:
This composite cermet, it is the mixed-powder that in above-mentioned WC/Co cermet, mixes metal or alloy again, adopt churned mechanically mode to mix, wherein the WC/Co cermet accounts for 80～100% of integral body, and Ni or NiCr alloy or NiCrFe alloy or Ni60 series alloy account for 0～20%; Its manufacturing technology steps is as follows:
A roller embryo forges;
The roughing of B roller embryo;
The modifier treatment of C roller embryo;
D assembles special tooling;
The mid frequency induction hardening of E roll surface;
The assembling of F roller;
The fine finishining of G roller;
The H roll surface cleans, preheating;
I roll surface sandblast texturing;
The spraying of J roll surface;
K roll surface rubbing down deglitch is handled.
2. method according to claim 1 is characterized in that described step J uses the HVAF system, and its technological parameter is:
3. method according to claim 1 is characterized in that described step D is with increasing intermediate heat-treatment technology, i.e. modifier treatment HB240-260 before the E, the fining metal tissue, eliminate forging stress, improve body of roll comprehensive mechanical performance, effectively reduce deflection in its mid frequency induction hardening of back.
4. method according to claim 3 is characterized in that described step D and E guarantee mid frequency induction hardening induction coil equidistant to roll surface, the uniformity of hardness after guaranteeing to quench by tool structure; In quenching process, workpiece moves with respect to mid frequency induction hardening induction coil spiral, has avoided the generation of soft band; Use the quenching supply frequency of 6000～8000HZ, reduced the amount of contraction of the body of roll in quenching process.
5. according to claim 1 or 2 or 3 or 4 described methods, it is characterized in that: the through-bore axis of this mid frequency induction hardening hard-surface strain roller and roller axis angle are 15 ° to 45 °.
6. according to claim 1 or 2 or 3 or 4 described methods, it is characterized in that: the two ends, the two side covers outside of this mid frequency induction hardening hard-surface strain roller have chamfering, and two side covers are by chamfered section and the welding of roller two ends inwall.
7. according to claim 1 or 2 or 3 or 4 described methods, it is characterized in that: be respectively equipped with square steel in the roller two ends of this mid frequency induction hardening hard-surface strain roller, two side covers are set up on the square steel.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN2008100429115A CN101362152B (en) | 2008-09-12 | 2008-09-12 | Intermediate-frequency quenching hard-surface strain roller manufacture method |
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| CN2008100429115A CN101362152B (en) | 2008-09-12 | 2008-09-12 | Intermediate-frequency quenching hard-surface strain roller manufacture method |
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| CN101362152B true CN101362152B (en) | 2010-08-11 |
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Families Citing this family (8)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN102601593B (en) * | 2012-03-30 | 2014-05-07 | 常州市武进广宇花辊机械有限公司 | Manufacturing process for large-diameter high-speed curtain coating roll |
| CN102864401B (en) * | 2012-09-23 | 2015-08-19 | 上海君山表面技术工程股份有限公司 | The method of tower top roller slag cleaning device and the scarfing cinder of tower top roller |
| CN103831580A (en) * | 2012-11-21 | 2014-06-04 | 上海宝钢工业技术服务有限公司 | Method for manufacturing hard-face roller of rolling mill |
| CN103182635B (en) * | 2013-04-15 | 2015-05-13 | 江苏华冶科技有限公司 | Processing method of hot expanding roller |
| CN107470854B (en) * | 2016-11-14 | 2019-01-11 | 常州宝菱重工机械有限公司 | The processing method of hot charging formula dam roller |
| WO2018092360A1 (en) * | 2016-11-17 | 2018-05-24 | Ｊｆｅスチール株式会社 | Sheet-passing method for steel sheet, and production equipment for thin steel sheet |
| CN111254375A (en) * | 2020-02-28 | 2020-06-09 | 鞍钢股份有限公司 | Production method of high-lubricity surface aluminum-zinc-plated plate |
| CN111389934A (en) * | 2020-04-01 | 2020-07-10 | 上海英佛曼纳米科技股份有限公司 | Nano coating with wear-resistant rough and super reduction-resistant cold rolling tension roller |
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