CN101362151A - Hard-surface build-up welding strain roller and manufacture method thereof - Google Patents
Hard-surface build-up welding strain roller and manufacture method thereof Download PDFInfo
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- CN101362151A CN101362151A CNA2008100429064A CN200810042906A CN101362151A CN 101362151 A CN101362151 A CN 101362151A CN A2008100429064 A CNA2008100429064 A CN A2008100429064A CN 200810042906 A CN200810042906 A CN 200810042906A CN 101362151 A CN101362151 A CN 101362151A
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Abstract
The invention relates to a hard-surface bead welding stretching roller and a production method thereof. The stretching roller comprises a drum and round side covers which are fixedly and closely covered at the openings of the two ends of the drum; the centers of the two side covers are in coupling connection with a left shaft head and a right shaft head respectively; the outer surface of the drum is covered with a spraying layer; the external sides of the two side covers are provided with sockets which stretch from the middle of the side covers to the edge; the external sides of the two sides covers are provided with chamfer angles in a surrounding way; the two side covers are welded with the inner walls at the two ends of the drum by the chamfer angles and the sockets; the spraying layer uses a functional metal ceramic coat which is composed of composite metal ceramic formed by WC/Co metal ceramics and metal or alloy. The roller solves the technical problems that as the external surface of the existing product roller surface is sprayed with hard plating, in the process of use, the coat is easy to produce pits or bumps owing to the press of sundries such as iron oxide, etc., and drawing stamps or stains are formed on the surface of finished product, strip steel, therefore, the surface quality of the strip steel is influenced; simultaneously, the technical problem that in the process of use, heat is easy to enter the inner side of the drum from the joint between the drum and the close cover is solved, therefore, the solution of the problems is beneficial to the longer service life of the stretching roller.
Description
Technical field
The jockey pulley that the present invention relates to use on the rolling mill production line, particularly a kind of hard-surface build-up welding 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, the heat that is gathered mainly is that the junction by roller and capping enters in the roller, also there is junction to enter in the roller by spindle nose and capping, jockey pulley can not be used 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 hard-surface build-up welding 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, heat enters the technical problem in the roller easily in solve using simultaneously from the junction of roller and capping, and it helps jockey pulley and uses for a long time.
For addressing the above problem, the present invention is achieved in that
A kind of hard-surface build-up welding 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, this groove extends to the edge in the middle of side cover, two side cover outer rings are provided with chamfering, and two side covers are by chamfering and groove and the welding of roller two ends inwall; This sprayed coating function of use metal-cermic coating, 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 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 hard-surface build-up welding strain roller is characterized in that: the depth capacity of this groove be side cover the thickest position 1/2-3/2.
Described hard-surface build-up welding 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, two side cover outer rings of roller of the present invention are provided with groove, this groove extends to the edge in the middle of side cover, two side cover outer rings are provided with chamfering, two side covers are by chamfering and groove and the welding of roller two ends inwall, this structure helps fully filling welding material in groove and chamfering, the joint gap place that helps enters in the roller, helps roller and uses for a long time.
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;
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 hard-surface build-up welding strain roller.It comprises that roller 1 and fixed sealing are placed on the circular side cover 21,22 of roller 1 both ends open, is respectively equipped with square steel 5, two side covers 21,22 in these roller 1 two ends and 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 on this roller 1 outer surface, two side covers, 21,22 outer rings are provided with groove 211,221, this groove 211,221 extends to the edge in the middle of side cover 21,22, two side covers, 21,22 outer rings are provided with chamfering 213,223, two side covers 21,22 by chamfering 213,223 and groove 211,221 and roller 1 two ends inwall welding.The depth capacity of this groove 211,221 be side cover 21,22 the thickest position 1/2-3/2, can guarantee to fill in the groove 211,221 enough welding materials like this to guarantee welded seal, also guaranteed bonding strength simultaneously.
The manufacture method of described hard-surface build-up welding strain roller is characterized in that it comprises the steps:
A] welding of roller embryo roll bending;
The roughing of B embryo;
C assembles special tooling;
The built-up welding of D roll surface;
The assembling of E roller;
The fine finishining of F roller;
The G roll surface cleans, preheating;
H roll surface sandblast texturing;
The spraying of I roll surface;
J roll surface rubbing down deglitch is handled.
Use the HVAF system among the described step I, 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 |
In order to guarantee the interlayer temperature of built-up welding, avoid the generation of pore, crackle among the described step D,, be full of heat-preservation cotton, reduce thermal loss, guarantee the uniformity of body of roll temperature in body of roll inside except that body of roll external application resistance wire and flame heat.
These roller 1 matrix hardness HS 〉=65, surperficial sprayed wc coating.The roll surface specification requirement is:
1. hardness checks that with the Li Shi hardometer hardness is in claimed range.
The roll surface flawless, do not have defective greater than pore and the slag inclusion of 0.5mm.
3. visual examination does not have wire or the soft band of ring-type after the roll surface grinding.
After the roll surface grinding no grinding feed lines and the vibration lines.
5. spraying back spray-on coating roughness, coating layer thickness, Vickers hardness are in the drawing claimed range.
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 (6)
1. hard-surface build-up welding 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, this groove extends to the edge in the middle of side cover, two side cover outer rings are provided with chamfering, and two side covers are by chamfering and groove and the welding of roller two ends inwall; This sprayed coating function of use metal-cermic coating, 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 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%.
2. hard-surface build-up welding strain roller according to claim 1 is characterized in that: the depth capacity of this groove be side cover the thickest position 1/2-3/2.
3. hard-surface build-up welding strain roller according to claim 1 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.
4. the manufacture method as hard-surface build-up welding strain roller as described in claim 1 or 2 or 3 is characterized in that it comprises the steps:
A] welding of roller embryo roll bending;
The roughing of B embryo;
C assembles special tooling;
The built-up welding of D roll surface;
The assembling of E roller;
The fine finishining of F roller;
The G roll surface cleans, preheating;
H roll surface sandblast texturing;
The spraying of I roll surface;
J roll surface rubbing down deglitch is handled.
5. method according to claim 4 is characterized in that using the HVAF system among the described step I, and its technological parameter is:
6. method according to claim 4 is characterized in that among the described step D avoiding the generation of pore, crackle in order to guarantee the interlayer temperature of built-up welding, except that body of roll external application resistance wire and flame heat, be full of heat-preservation cotton in body of roll inside, reduce thermal loss, guarantee the uniformity of body of roll temperature.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2008100429064A CN101362151B (en) | 2008-09-12 | 2008-09-12 | Hard-surface build-up welding strain roller |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2008100429064A CN101362151B (en) | 2008-09-12 | 2008-09-12 | Hard-surface build-up welding strain roller |
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| CN101362151A true CN101362151A (en) | 2009-02-11 |
| CN101362151B CN101362151B (en) | 2011-02-16 |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102553929A (en) * | 2011-12-20 | 2012-07-11 | 苏州东君橡胶机械厂 | Roller taking dug iron as base material and manufacturing technology thereof |
| CN102658453A (en) * | 2012-04-28 | 2012-09-12 | 黄石山力大通热工设备有限公司 | Processing method of high manganese steel tension roller |
| CN103182635A (en) * | 2013-04-15 | 2013-07-03 | 江苏华冶科技有限公司 | Processing method of hot expanding roller |
| CN103882364A (en) * | 2014-03-20 | 2014-06-25 | 安徽再制造技术研究院有限公司 | Hypersonic flame spraying remediation method for ferrous metallurgy roller component |
| CN104593713A (en) * | 2013-10-30 | 2015-05-06 | 上海宝钢工业技术服务有限公司 | Preparation method for tension-roller thermal-sprayed coating |
| CN108453135A (en) * | 2017-10-31 | 2018-08-28 | 武钢新日铁（武汉）镀锡板有限公司 | A kind of jockey pulley journal structure |
| CN110142570A (en) * | 2019-05-15 | 2019-08-20 | 安徽马钢表面技术股份有限公司 | A kind of wear-resisting, resisting viscosity steel composite coating, preparation method and application |
-
2008
- 2008-09-12 CN CN2008100429064A patent/CN101362151B/en active Active
Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102553929A (en) * | 2011-12-20 | 2012-07-11 | 苏州东君橡胶机械厂 | Roller taking dug iron as base material and manufacturing technology thereof |
| CN102658453A (en) * | 2012-04-28 | 2012-09-12 | 黄石山力大通热工设备有限公司 | Processing method of high manganese steel tension roller |
| CN102658453B (en) * | 2012-04-28 | 2014-11-19 | 黄石山力大通热工设备有限公司 | Processing method of high manganese steel tension roller |
| CN103182635A (en) * | 2013-04-15 | 2013-07-03 | 江苏华冶科技有限公司 | Processing method of hot expanding roller |
| CN103182635B (en) * | 2013-04-15 | 2015-05-13 | 江苏华冶科技有限公司 | Processing method of hot expanding roller |
| CN104593713A (en) * | 2013-10-30 | 2015-05-06 | 上海宝钢工业技术服务有限公司 | Preparation method for tension-roller thermal-sprayed coating |
| CN104593713B (en) * | 2013-10-30 | 2018-08-17 | 上海宝钢工业技术服务有限公司 | The preparation method of jockey pulley hot-spraying coating |
| CN103882364A (en) * | 2014-03-20 | 2014-06-25 | 安徽再制造技术研究院有限公司 | Hypersonic flame spraying remediation method for ferrous metallurgy roller component |
| CN108453135A (en) * | 2017-10-31 | 2018-08-28 | 武钢新日铁（武汉）镀锡板有限公司 | A kind of jockey pulley journal structure |
| CN108453135B (en) * | 2017-10-31 | 2023-10-13 | 武钢新日铁（武汉）镀锡板有限公司 | Tension roller shaft neck structure |
| CN110142570A (en) * | 2019-05-15 | 2019-08-20 | 安徽马钢表面技术股份有限公司 | A kind of wear-resisting, resisting viscosity steel composite coating, preparation method and application |
| CN110142570B (en) * | 2019-05-15 | 2020-11-27 | 安徽马钢表面技术股份有限公司 | Wear-resistant and anti-stick steel composite coating, preparation method and application |
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| Publication number | Publication date |
|---|---|
| CN101362151B (en) | 2011-02-16 |
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