CN106337178A - Laser cladding treatment process for heating furnace hearth roll collar surface - Google Patents
Laser cladding treatment process for heating furnace hearth roll collar surface Download PDFInfo
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- CN106337178A CN106337178A CN201510391477.1A CN201510391477A CN106337178A CN 106337178 A CN106337178 A CN 106337178A CN 201510391477 A CN201510391477 A CN 201510391477A CN 106337178 A CN106337178 A CN 106337178A
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Abstract
The invention relates to a laser cladding treatment process for a heating furnace hearth roll collar surface. The process comprises the steps of: cleaning a heating furnace hearth roll collar surface; conveying Co based alloy powder by a coaxial or paraxial powder feeding mode, selecting a carbon dioxide laser to rapidly scan the cleaned roll collar surface by means of narrowband or broadband scanning so as to realize alloying treatment of the heating furnace hearth roll collar surface, thus obtaining an alloying layer; and conducting crack and flaw detection and judging whether crack is produced. The process provided by the invention reinforces the hearth roll collar surface, improves the service life of the roll collar, basically solves the problem of nodulation on the roll collar surface, saves the roll changing time and maintenance time, improves the heating furnace work efficiency, and reduces the production cost.
Description
Technical field
The present invention relates to heating-furnace bottom roller collars surface intensified technique field, specially a kind of Laser Cladding Treatment technique in heating-furnace bottom roller collars face.
Background technology
Hearth roll is the key components and partss in metallurgy industry various heat treatment part course of conveying, and it is widely used in various heat-treatment furnaces, including continuous annealing furnace, heating furnace, heat treatment normalizing furnace etc..Heating-furnace bottom roller plays the effect of transporting steel billet, and in order to ensure that steel billet occurs without quality problems in the follow-up operation of rolling, prevents from forming dross thing on steel rod surface when steel rod and steel plate high temperature contact most important.Heating-furnace bottom roller collars uses co50 alloy material now commonplacely, and this kind of material to be hearth roll manufacture the top material in field, cost intensive, it is in use, collars face also cannot overcome the problem of dross completely, result in the need for the online hearth roll of periodic replacement and carry out even scrapping except tumor reparation of collars, have a strong impact on manufacturing schedule, considerably increase the operating cost of heating furnace.
Heating-furnace bottom roller is the key components and partss of transporting steel billet, and existing have the manufacture for heating-furnace bottom roller for the kinds of processes method, and the selection of wherein co sill occupies highly important status.As collars total part adopts co50 material, made using integral casting method, it is characterized in high temperature oxidation resisting, and have the ability keeping hardness under certain high temperature, it also has original realization in terms of elevated temperature strength, heat shock resistance and abrasion resistance properties, but the hearth roll being manufactured with this kind of method, the average manufacturing cost of single roller is 7-9 ten thousand/only, sufficiently expensive, and also cannot avoid the generation of collars face dross phenomenon in lifetime, therefore, the manufacture that application method for surface hardening carries out hearth roll is also the direction of people's effort always.Praxair company employs under the working environment more than 900 DEG C for the furnace temperature and carries out chromium carbide and the process meanses of cobalt-based high-temperature alloy spraying in roll surface, result hearth roll also can occur dross in use, or even partial coating produces initial failure, comes off.Also there is the trial in hearth roll surface spray-coating oxide ceramics at present, as zirconia-yttria system and alumina chromia system, these ceramic coatings have very strong anti-dross effect at high temperature, but unstable at high operating temperatures, or even can separate out element generation chemical reaction with surface of steel plate.
Laser surface alloying processing method, as heat spraying method, is a kind of surface intensified technique means.Prepare functional type coating using it in material surface and form a layer function coating with using heat spraying method in general material surface, thus reach mentality of designing that is cost-effective and ensureing product serviceability purpose coming down in a continuous line.For the dross of hearth roll collars face, have the advantage that 1. laser surface alloying methods using laser surface alloying process than traditional heat spraying method, what the strengthened coat that it forms and base material were formed is metallurgical binding rather than mechanical bond, and therefore coating will not produce early fallout；2. its compactness of coating top layer of application laser surface alloying method preparation is better than sprayed coating, and the mechanism and cause due to hearth roll furnace sow, and its imitative nodulation ability of coating surface of laser surface cladding method preparation is better than sprayed coating.
From same coated powder system, laser surface cladding method keep above-mentioned be compared to heat spraying method advantage while do not lose that its machining deformation is little, strengthening layer tissue is fine and closely woven again, high degree of automation the advantages of, therefore apply it to carry out surface alloying process to hearth roll collars face.
Content of the invention
Technical problem solved by the invention is to provide a kind of Laser Cladding Treatment technique in heating-furnace bottom roller collars face, to solve the problems, such as to propose in above-mentioned background technology.
Technical problem solved by the invention employs the following technical solutions to realize:
A kind of Laser Cladding Treatment technique in heating-furnace bottom roller collars face, comprises the following steps that:
(1) heating-furnace bottom roller collars face is cleaned；
(2) using coaxial or paraxonic automatic powder feeding system conveying co base alloy powder, arrowband or the scan mode in broadband, from laser power p=2000 ~ 5000w, clean collars face in the quick scanning step of the carbon dioxide laser (1) of scanning speed v=200 ~ 800mm/min, realize the Alloying Treatment in heating-furnace bottom roller collars face, obtain alloying layer；
(3) alloying layer of preparation in step (2) is carried out with crack-detecting detects and the crackle that gets the wrong sow by the ear produces.
As the further scheme of the present invention: step (1) is: with abluent, oil removing, rust cleaning are carried out to heating-furnace bottom roller collars face under room temperature, and clean with alcohol washes.
As the further scheme of the present invention: the co base alloy powder described in step (2) according to the concrete composition of percentage by weight is:
As the further scheme of the present invention: a width of d=10mm of band of step (2) middle width strip.
As the further scheme of the present invention: a width of d=3mm of band of arrowband in step (2).
As the further scheme of the present invention: select laser power p=3500w, the carbon dioxide laser of scanning speed v=500mm/min in step (2).
The present invention adopts laser surface alloying technique, alloying layer structures are mainly made up of chromium carbide and the ultra-fine as-cast structure of supersaturated solid solution, keep stiffness capabilities very strong under this tissue hyperthermia, and in the presence of strengthening mechanism in refined crystalline strengthening, solution strengthening, dispersion-strengtherning three, the hardness number of cladding layer can be maintained at higher level, and is not less than the coating of heat spraying method preparation.In addition, the alloying layer being formed according to existing theory, Laser Alloying Treatment, its high temperature wear resistant performance, pyro-oxidation resistance, high-temperature corrosion resistance performance are all very excellent.For the problem of hearth roll collars face dross, the high-compactness of cladding layer and high rigidity ensure that the good behaviour of its resistive connection tumor, and product also shows anti-Noduling ability well in use really.
Beneficial effect
Invention enhances hearth roll collars face, improve collars service life, substantially solve the problems, such as collars face dross, saved roll changing time and maintenance time, improve heating furnace working performance, reduce production cost.
Specific embodiment
In order that realize technological means, creation characteristic, reached purpose and effect of the present invention are easy to understand, with reference to embodiment, the present invention is expanded on further.
Embodiment 1
A kind of Laser Cladding Treatment technique in heating-furnace bottom roller collars face, comprises the following steps that:
(1) with abluent, oil removing, rust cleaning are carried out to heating-furnace bottom roller collars face under room temperature, and clean with alcohol washes；
(2) paraxonic automatic powder feeding system is adopted to convey co base alloy powder, broadband scanning mode (d=10mm), from laser power p=3800w, clean collars face in the quick scanning step of the carbon dioxide laser (1) of scanning speed v=600mm/min, the cladding realizing heating-furnace bottom roller collars face is processed；
(3) cladding layer of preparation in step (2) is carried out with crack-detecting detects and the crackle that gets the wrong sow by the ear produces.
Embodiment 2
A kind of Laser Cladding Treatment technique in heating-furnace bottom roller collars face, comprises the following steps that:
(1) with abluent, oil removing, rust cleaning are carried out to heating-furnace bottom roller collars face under room temperature, and clean with alcohol washes；
(2) co base alloy powder is conveyed using coaxial powder-feeding mode, narrow band scanning mode (d=3mm), from laser power p=3000w, clean collars face in the quick scanning step of the carbon dioxide laser (1) of scanning speed v=300mm/min, the cladding realizing heating-furnace bottom roller collars face is processed；
(3) cladding layer of preparation in step (2) is carried out with crack-detecting detects and the crackle that gets the wrong sow by the ear produces.
Embodiment 3
A kind of Laser Cladding Treatment technique in heating-furnace bottom roller collars face, comprises the following steps that:
(1) with abluent, oil removing, rust cleaning are carried out to heating-furnace bottom roller collars face under room temperature, and clean with alcohol washes；
(2) paraxonic automatic powder feeding system is adopted to convey co base alloy powder, narrow band scanning mode (d=3mm), from laser power p=2000w, in the quick scanning step of the carbon dioxide laser (1) of scanning speed v=000mm/min, clean collars face, realizes the Alloying Treatment in heating-furnace bottom roller collars face；
(3) alloying layer of preparation in step (2) is carried out with crack-detecting detects and the crackle that gets the wrong sow by the ear produces.
Embodiment 4
A kind of Laser Cladding Treatment technique in heating-furnace bottom roller collars face, comprises the following steps that:
(1) with abluent, oil removing, rust cleaning are carried out to heating-furnace bottom roller collars face under room temperature, and clean with alcohol washes；
(2) co base alloy powder is conveyed using coaxial powder-feeding mode, broadband scanning mode (d=10mm), from laser power p=5000w, in the quick scanning step of the carbon dioxide laser (1) of scanning speed v=800mm/min, clean collars face, realizes the Alloying Treatment in heating-furnace bottom roller collars face；
(3) alloying layer of preparation in step (2) is carried out with crack-detecting detects and the crackle that gets the wrong sow by the ear produces.
Ultimate principle and principal character and the advantages of the present invention of the present invention have been shown and described above.It should be understood by those skilled in the art that; the present invention is not restricted to the described embodiments; merely illustrating the principles of the invention described in above-described embodiment and description; without departing from the spirit and scope of the present invention; the present invention also has various changes and modifications, and these changes and improvements both fall within scope of the claimed invention.The claimed scope of the present invention is by appending claims and its equivalent thereof.
Claims (5)
1. a kind of Laser Cladding Treatment technique in heating-furnace bottom roller collars face, comprises the following steps that:
Heating-furnace bottom roller collars face is cleaned；
Using coaxial or paraxonic automatic powder feeding system conveying co base alloy powder, arrowband or the scan mode in broadband, from laser power p=2000 ~ 5000w, clean collars face in the quick scanning step of the carbon dioxide laser (1) of scanning speed v=200 ~ 800mm/min, realize the Alloying Treatment in heating-furnace bottom roller collars face, obtain alloying layer；
The alloying layer of preparation in step (2) is carried out with crack-detecting detects and the crackle that gets the wrong sow by the ear produces.
2. the Laser Cladding Treatment technique in heating-furnace bottom roller collars face according to claim 1 is it is characterised in that step (1) is: with abluent, oil removing, rust cleaning are carried out to heating-furnace bottom roller collars face under room temperature, and clean with alcohol washes.
3. the Laser Cladding Treatment technique in heating-furnace bottom roller collars face according to claim 1 is it is characterised in that a width of d=10mm of band of step (2) middle width strip.
4. heating-furnace bottom roller collars face according to claim 1 Laser Cladding Treatment technique it is characterised in that in step (2) arrowband a width of d=3mm of band.
5. the Laser Cladding Treatment technique in heating-furnace bottom roller collars face according to claim 1 is it is characterised in that select laser power p=3500w, the carbon dioxide laser of scanning speed v=500mm/min in step (2).
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| Application Number | Priority Date | Filing Date | Title |
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| CN201510391477.1A CN106337178A (en) | 2015-07-07 | 2015-07-07 | Laser cladding treatment process for heating furnace hearth roll collar surface |
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| CN201510391477.1A CN106337178A (en) | 2015-07-07 | 2015-07-07 | Laser cladding treatment process for heating furnace hearth roll collar surface |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110747465A (en) * | 2019-11-28 | 2020-02-04 | 上海大陆天瑞激光表面工程有限公司 | Laser manufacturing method of hearth roll of hot-rolling annealing furnace |
| CN112846093A (en) * | 2020-12-31 | 2021-05-28 | 泉州市双发五金制品有限公司 | Valve cover integrated forming process of indoor fire hydrant and rotary hydrant |
| CN114616351A (en) * | 2019-12-23 | 2022-06-10 | 日本制铁株式会社 | Hearth roll for continuous annealing furnace |
| CN115537806A (en) * | 2022-10-19 | 2022-12-30 | 北京赛亿科技有限公司 | Manufacturing process of anti-caking furnace bottom roller |
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| CN102703896A (en) * | 2012-06-07 | 2012-10-03 | 安阳市飞龙冶金设备制造有限公司 | Production technology for smelting and cladding alloy reinforced wear-resisting sliding plate |
| CN103046044A (en) * | 2012-12-21 | 2013-04-17 | 中国兵器科学研究院宁波分院 | Laser deposition composite powder and method for remanufacturing waste roller table roller surface |
| CN103774135A (en) * | 2013-12-31 | 2014-05-07 | 武汉团结点金激光科技有限公司 | Process for manufacturing novel hearth roll collar with laser clad composite coating |
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2015
- 2015-07-07 CN CN201510391477.1A patent/CN106337178A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102703896A (en) * | 2012-06-07 | 2012-10-03 | 安阳市飞龙冶金设备制造有限公司 | Production technology for smelting and cladding alloy reinforced wear-resisting sliding plate |
| CN103046044A (en) * | 2012-12-21 | 2013-04-17 | 中国兵器科学研究院宁波分院 | Laser deposition composite powder and method for remanufacturing waste roller table roller surface |
| CN103774135A (en) * | 2013-12-31 | 2014-05-07 | 武汉团结点金激光科技有限公司 | Process for manufacturing novel hearth roll collar with laser clad composite coating |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110747465A (en) * | 2019-11-28 | 2020-02-04 | 上海大陆天瑞激光表面工程有限公司 | Laser manufacturing method of hearth roll of hot-rolling annealing furnace |
| CN110747465B (en) * | 2019-11-28 | 2021-11-16 | 上海大陆天瑞激光表面工程有限公司 | Laser manufacturing method of hearth roll of hot-rolling annealing furnace |
| CN114616351A (en) * | 2019-12-23 | 2022-06-10 | 日本制铁株式会社 | Hearth roll for continuous annealing furnace |
| CN112846093A (en) * | 2020-12-31 | 2021-05-28 | 泉州市双发五金制品有限公司 | Valve cover integrated forming process of indoor fire hydrant and rotary hydrant |
| CN115537806A (en) * | 2022-10-19 | 2022-12-30 | 北京赛亿科技有限公司 | Manufacturing process of anti-caking furnace bottom roller |
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Application publication date: 20170118 |