CN106868499B - A kind of reproducing method of pass hot roll - Google Patents
A kind of reproducing method of pass hot roll Download PDFInfo
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- CN106868499B CN106868499B CN201710036687.8A CN201710036687A CN106868499B CN 106868499 B CN106868499 B CN 106868499B CN 201710036687 A CN201710036687 A CN 201710036687A CN 106868499 B CN106868499 B CN 106868499B
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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
- C23C24/00—Coating starting from inorganic powder
- C23C24/08—Coating starting from inorganic powder by application of heat or pressure and heat
- C23C24/10—Coating starting from inorganic powder by application of heat or pressure and heat with intermediate formation of a liquid phase in the layer
- C23C24/103—Coating with metallic material, i.e. metals or metal alloys, optionally comprising hard particles, e.g. oxides, carbides or nitrides
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Abstract
A kind of reproducing method of pass hot roll, it is the following steps are included: (1) falls the corrosion and fatigue layer of roll pass working surface by CNC Lathe Turning.It (2) is by mass percentage the alloyage coating of 95~90:5~10 by prepared Chinese ink and Cr powder.(3) prepared surface alloying coating is uniformly applied to roller surface, dried；(4) roll is fixed on high-power semiconductor laser machining tool and carries out laser alloying, laser molten pool blown inert gas is protected in alloying；(5) nondestructive inspection is carried out to the roll after alloying.Present invention process is simple, and controllability is strong, energy conservation and environmental protection, can significantly improve roller surface hardness, wearability and corrosion resistance, increases the service life of roll, greatly reduces the use cost of roll.
Description
The invention belongs to field of machining, in particular to a kind of reproducing methods of milling train component for technical field.
Background technique with the development of modern industry, the high quality demand especially to various screw-thread steels and angle steel, for rolling
More stringent requirements are proposed for steel production, and the pass hot roll as milling train critical component is largely consumed.With market to profile,
The increase of the diversified demand of the materials such as angle steel, steel alloy and difficult deformable metal rolling, the use condition of pass hot roll
It asks and is increasingly stringenter.Pass hot roll subjects very big rolling stress and the shadow by alternating thermal stress during the work time
It rings, is easy to generate the failure modes such as fatigue, abrasion and peeling in pass hot roll pass working surface, leads to roll failure report
It is useless, directly affect product quality and production cost.
Summary of the invention the invention patent is designed to provide a kind of simple process, and controllability is strong, low in cost, energy conservation
The reproducing method of the pass hot roll of environmental protection.
Technical scheme is as follows:
(1) by the pass hot roll after numerically controlled lathe cutting abrasion, turning removes roll pass work with a thickness of 1~3mm
Make the corrosion and fatigue layer on surface；
(2) the pass hot roll after turning is cleaned repeatedly using dehydrated alcohol and acetone, remove the impurity such as greasy dirt；
(3) the defects of magnetic powder inspection and ultrasonic examination being used to roll, checking for crackle, it is ensured that roll is without table
Face and internal flaw；
(4) it is equably applied to roll body surface with prepared surface alloying coating, coating layer thickness is 0.1~0.3mm, is dried
For use；
The surface alloying coating is the mixture of prepared Chinese ink and Cr powder, and mass percent is 95~90:5~10, Cr powder
Mesh number is 185~325 mesh；
(5) roll is fixed on high-power semiconductor laser numerical control machine for processing, drives roller rotational using chuck, swashs
The hot spot of light device is 2 × 14mm rectangular light spot, and scan power is 3000~3800W, 1200~1600mm/min of scanning speed；It closes
In aurification, laser molten pool blown inert gas is protected, obtains alloying layer, the indifferent gas in pass hot rolling roller surface
Body is nitrogen；
(6) surface dye penetrant inspection is carried out to the roll after processing, detects whether the defect for having an impact roll mechanical performance, protected
The shape and surface quality for demonstrate,proving roll reach criterion of acceptability.
The invention has the following advantages over the prior art:
1, laser-alloying Technolgy Energy distribution is intensive, and deflection is small, and voidage is low, the combination between alloying layer and matrix
Property is strong, and residual stress is small.
2, the pass surface repaired can obtain the institutional frameworks such as the martensite of high strength and high hardness, in surface alloying coating
C, the elements such as Cr generate a variety of high hard wear-resisting carbide in roller surface, are present in alloy-layer as hard phase, so that making again
The hardness of roller surface after making, wearability and corrosion resistance are higher than roller substrate, so that roll active time is increased, it can
To reduce the replacement of roll and repair number, the production and application cost of roll is greatly reduced, Rolling Production efficiency is improved.
3, the remediation intensification for realizing milling train critical component, for promoting the use of China's rolling equipment critical component roll
It service life, service efficiency and enhances the competitiveness with important theory significance and practical value.
4, after concave roll alloying, the more untreated preceding matrix surface hardness of the Rockwell hardness of alloying layer improves HRC8
More than, wearability improves 1.5 times or more, and has more excellent high-temperature corrosion resistance performance.
Specific embodiment
Embodiment 1
Pass hot roll to be repaired is cut by numerically controlled lathe first, turning removes roll pass with a thickness of 1mm
The corrosion and fatigue layer of working surface；Then it is cleaned repeatedly using dehydrated alcohol and acetone, removes greasy dirt and corrosion；Next right
Roll uses magnetic powder inspection and ultrasonic examination, checks the defects of body of roll whether there is crackle, it is ensured that roll is without surface and inside
Defect；It is by mass percentage that 95:5 is configured by prepared Chinese ink and Cr powder, the mesh number of Cr powder is 185~325 mesh；By configured conjunction
Aurification coating is uniformly applied to roller surface, and coating layer thickness 0.1mm dries；Then roll high power semi-conductor is fixed on to swash
On light numerical control machine for processing, roller rotational is driven using chuck, roller surface is scanned using laser beam, laser scanning function
Rate is 3000W, scanning speed 1200mm/min, in alloying, is protected to laser molten pool blown inert gas nitrogen, in hole
Type hot rolling roller surface obtains alloying layer；Surface dye penetrant inspection finally is carried out to the roll after alloying, detects whether have an impact
The defect of roll mechanical performance guarantees that the shape of roll and surface quality reach criterion of acceptability.Through detecting, after remanufacturing
The more untreated preceding matrix surface hardness of pass hot roll surface alloying layer Rockwell hardness averagely improve HRC8 or more, wearability
Improve 2.1 times.
Embodiment 2
Pass hot roll to be repaired is cut by numerically controlled lathe first, turning removes roll pass with a thickness of 2mm
The corrosion and fatigue layer of working surface；Then it is cleaned repeatedly using dehydrated alcohol and acetone, removes greasy dirt and corrosion；Next right
Roll uses magnetic powder inspection and ultrasonic examination, checks the defects of body of roll whether there is crackle, it is ensured that roll is without surface and inside
Defect；It is by mass percentage that 93:7 is configured by prepared Chinese ink and Cr powder, the mesh number of Cr powder is 185~325 mesh；By configured conjunction
Aurification coating is uniformly applied to roller surface, and coating layer thickness 0.2mm dries；Then roll high power semi-conductor is fixed on to swash
On light numerical control machine for processing, roller rotational is driven using chuck, roller surface is scanned using laser beam, laser scanning function
Rate is 3300W, scanning speed 1400mm/min, in alloying, is protected to laser molten pool blown inert gas nitrogen, in hole
Type hot rolling roller surface obtains alloying layer；Surface dye penetrant inspection finally is carried out to the roll after alloying, detects whether have an impact
The defect of roll mechanical performance guarantees that the shape of roll and surface quality reach criterion of acceptability.Through detecting, after remanufacturing
The more untreated preceding matrix surface hardness of pass hot roll surface alloying layer Rockwell hardness averagely improve HRC11, wearability mentions
It is nearly 2 times high.
Embodiment 3
Pass hot roll to be repaired is cut by numerically controlled lathe first, turning removes roll pass with a thickness of 3mm
The corrosion and fatigue layer of working surface；Then it is cleaned repeatedly using dehydrated alcohol and acetone, removes greasy dirt and corrosion；Next right
Roll uses magnetic powder inspection and ultrasonic examination, checks the defects of body of roll whether there is crackle, it is ensured that roll is without surface and inside
Defect；It is by mass percentage that 92:8 is configured by prepared Chinese ink and Cr powder, the mesh number of Cr powder is 185~325 mesh；By configured conjunction
Aurification coating is uniformly applied to roller surface, and coating layer thickness 0.3mm dries；Then roll high power semi-conductor is fixed on to swash
On light numerical control machine for processing, roller rotational is driven using chuck, roller surface is scanned using laser beam, laser scanning function
Rate is 3800W, scanning speed 1600mm/min, in alloying, is protected to laser molten pool blown inert gas nitrogen, in hole
Type hot rolling roller surface obtains alloying layer；Surface dye penetrant inspection finally is carried out to the roll after alloying, detects whether have an impact
The defect of roll mechanical performance guarantees that the shape of roll and surface quality reach criterion of acceptability.
Embodiment 4
Pass hot roll to be repaired is cut by numerically controlled lathe first, turning removes roll hole with a thickness of 1.5mm
The corrosion and fatigue layer of type working surface；Then it is cleaned repeatedly using dehydrated alcohol and acetone, removes greasy dirt and corrosion.Next
Magnetic powder inspection and ultrasonic examination are used to roll, check the defects of body of roll whether there is crackle, it is ensured that roll is without surface and interior
Portion's defect；It is by mass percentage that 95:5 is configured by prepared Chinese ink and Cr powder, the mesh number of Cr powder is 185~325 mesh；It will be configured
Surface alloying coating is uniformly applied to roller surface, and coating layer thickness 0.2mm dries.Then roll is fixed on high power semi-conductor
It laser machines on numerically-controlled machine tool, drives roller rotational using chuck, roller surface is scanned using laser beam, laser scanning
Power is 3600W, scanning speed 1550mm/min, in alloying, is protected to laser molten pool blown inert gas nitrogen,
Pass hot rolling roller surface obtains alloying layer；Surface dye penetrant inspection finally is carried out to the roll after alloying, has detected whether shadow
The defect for ringing roll mechanical performance, guarantees that the shape of roll and surface quality reach criterion of acceptability.
Embodiment 5
Pass hot roll to be repaired is cut by numerically controlled lathe first, turning removes roll hole with a thickness of 2.5mm
The corrosion and fatigue layer of type working surface；Then it is cleaned repeatedly using dehydrated alcohol and acetone, removes greasy dirt and corrosion；Next
Magnetic powder inspection and ultrasonic examination are used to roll, check the defects of body of roll whether there is crackle, it is ensured that roll is without surface and interior
Portion's defect；It is by mass percentage that 90:10 is configured by prepared Chinese ink and Cr powder, the mesh number of Cr powder is 185~325 mesh.It will configure
Surface alloying coating be uniformly applied to roller surface, coating layer thickness 0.25mm dries；Then roll high-power half is fixed on to lead
On volumetric laser numerical control machine for processing, roller rotational is driven using chuck, roller surface is scanned using laser beam, laser is swept
Retouching power is 3800W, scanning speed 1600mm/min, in alloying, is protected to laser molten pool blown inert gas nitrogen,
Alloying layer is obtained in pass hot rolling roller surface；Surface dye penetrant inspection finally is carried out to the roll after alloying, has been detected whether
The defect for influencing roll mechanical performance, guarantees that the shape of roll and surface quality reach criterion of acceptability.
Embodiment 6
Pass hot roll to be repaired is cut by numerically controlled lathe first, turning removes roll hole with a thickness of 1.5mm
The corrosion and fatigue layer of type working surface；Then it is cleaned repeatedly using dehydrated alcohol and acetone, removes greasy dirt and corrosion；Next
Magnetic powder inspection and ultrasonic examination are used to roll, check the defects of body of roll whether there is crackle, it is ensured that roll is without surface and interior
Portion's defect；It is by mass percentage that 91:9 is configured by prepared Chinese ink and Cr powder, the mesh number of Cr powder is 185~325 mesh；It will be configured
Surface alloying coating is uniformly applied to roller surface, and coating layer thickness 0.3mm dries；Then roll is fixed on high power semi-conductor
It laser machines on numerically-controlled machine tool, drives roller rotational using chuck, roller surface is scanned using laser beam, laser scanning
Power is 3700W, scanning speed 1580mm/min, in alloying, is protected to laser molten pool blown inert gas nitrogen,
Pass hot rolling roller surface obtains alloying layer；Surface dye penetrant inspection finally is carried out to the roll after alloying, has detected whether shadow
The defect for ringing roll mechanical performance, guarantees that the shape of roll and surface quality reach criterion of acceptability.
Embodiment 7
Pass hot roll to be repaired is cut by numerically controlled lathe first, turning removes roll hole with a thickness of 2.2mm
The corrosion and fatigue layer of type working surface；Then it is cleaned repeatedly using dehydrated alcohol and acetone, removes greasy dirt and corrosion；Next
Magnetic powder inspection and ultrasonic examination are used to roll, check the defects of body of roll whether there is crackle, it is ensured that roll is without surface and interior
Portion's defect；It is by mass percentage that 95:5 is configured by prepared Chinese ink and Cr powder, the mesh number of Cr powder is 185~325 mesh；It will be configured
Surface alloying coating is uniformly applied to roller surface, and coating layer thickness 0.2mm dries.Then roll is fixed on high power semi-conductor
It laser machines on numerically-controlled machine tool, drives roller rotational using chuck, roller surface is scanned using laser beam, laser scanning
Power is 3800W, scanning speed 1600mm/min, in alloying, is protected to laser molten pool blown inert gas nitrogen,
Pass hot rolling roller surface obtains alloying layer；Surface dye penetrant inspection finally is carried out to the roll after alloying, has detected whether shadow
The defect for ringing roll mechanical performance, guarantees that the shape of roll and surface quality reach criterion of acceptability.
Embodiment 8
Pass hot roll to be repaired is cut by numerically controlled lathe first, turning removes roll pass with a thickness of 1mm
The corrosion and fatigue layer of working surface；Then it is cleaned repeatedly using dehydrated alcohol and acetone, removes greasy dirt and corrosion；Next right
Roll uses magnetic powder inspection and ultrasonic examination, checks the defects of body of roll whether there is crackle, it is ensured that roll is without surface and inside
Defect；It is by mass percentage that 94:6 is configured by prepared Chinese ink and Cr powder, the mesh number of Cr powder is 185~325 mesh；By configured conjunction
Aurification coating is uniformly applied to roller surface, and coating layer thickness 0.1mm dries；Then roll high power semi-conductor is fixed on to swash
On light numerical control machine for processing, roller rotational is driven using chuck, roller surface is scanned using laser beam, laser scanning function
Rate is 3100W, scanning speed 1300mm/min, in alloying, is protected to laser molten pool blown inert gas nitrogen, in hole
Type hot rolling roller surface obtains alloying layer；Surface dye penetrant inspection finally is carried out to the roll after alloying, detects whether have an impact
The defect of roll mechanical performance guarantees that the shape of roll and surface quality reach criterion of acceptability.
Claims (2)
1. a kind of reproducing method of pass hot roll, it is characterized in that: it the following steps are included:
(1) by the pass hot roll after numerically controlled lathe cutting abrasion, turning removes roll pass worksheet with a thickness of 1~3mm
The corrosion and fatigue layer in face；
(2) the pass hot roll after turning is cleaned repeatedly using dehydrated alcohol and acetone, remove the impurity such as greasy dirt；
(3) magnetic powder inspection and ultrasonic examination, the defects of checking for crackle, are used to roll, it is ensured that roll without surface and
Internal flaw；
(4) be equably applied to roll body surface with prepared surface alloying coating, coating layer thickness is 0.1~0.3mm, dry to
With；The surface alloying coating is the mixture of prepared Chinese ink and Cr powder, and mass percent is 95~90:5~10, and the mesh number of Cr powder is
185~325 mesh；
(5) roll is fixed on high-power semiconductor laser numerical control machine for processing, drives roller rotational, laser using chuck
Hot spot be 2 × 14mm rectangular light spot, scan power be 3000~3800W, 1200~1600mm/min of scanning speed；Alloying
In, laser molten pool blown inert gas is protected, obtains alloying layer in pass hot rolling roller surface；
(6) surface dye penetrant inspection is carried out to the roll after processing, detects whether the defect for having an impact roll mechanical performance, guarantees to roll
The shape and surface quality of roller reach criterion of acceptability.
2. the reproducing method of pass hot roll according to claim 1, it is characterized in that: the inert gas is nitrogen
Gas.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201710036687.8A CN106868499B (en) | 2017-01-18 | 2017-01-18 | A kind of reproducing method of pass hot roll |
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| CN201710036687.8A CN106868499B (en) | 2017-01-18 | 2017-01-18 | A kind of reproducing method of pass hot roll |
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| CN106868499A CN106868499A (en) | 2017-06-20 |
| CN106868499B true CN106868499B (en) | 2019-06-07 |
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Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN107794529A (en) * | 2017-10-24 | 2018-03-13 | 燕山大学 | A kind of alloying preparation method of angle steel hot roll |
| CN108411297A (en) * | 2018-03-30 | 2018-08-17 | 燕山大学 | A kind of intensifying method of hot roll |
| CN113436687B (en) * | 2021-06-22 | 2024-05-28 | 马鞍山钢铁股份有限公司 | Method for rapidly judging alloying degree of aluminum or aluminum alloy coating |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN101225463A (en) * | 2008-01-30 | 2008-07-23 | 天津烨峤激光技术有限公司 | Method for restoring and improving service life of hot roller and cold rolling subsidiary roller |
| CN101817019A (en) * | 2010-03-19 | 2010-09-01 | 柳州市柳港激光科技有限公司 | Compound roll of hole pattern alloy materials |
| CN102010940A (en) * | 2010-12-24 | 2011-04-13 | 攀枝花钢城集团有限公司 | Laser surface treatment method of pass roll |
| JP2015135261A (en) * | 2014-01-17 | 2015-07-27 | Ｊｆｅスチール株式会社 | Leakage magnetic flux method and leakage magnetic flux device for flaw detection of thin steel strip |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US8418563B2 (en) * | 2011-08-22 | 2013-04-16 | Herzog Services, Inc. | Apparatus for detecting defects |
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Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101225463A (en) * | 2008-01-30 | 2008-07-23 | 天津烨峤激光技术有限公司 | Method for restoring and improving service life of hot roller and cold rolling subsidiary roller |
| CN101817019A (en) * | 2010-03-19 | 2010-09-01 | 柳州市柳港激光科技有限公司 | Compound roll of hole pattern alloy materials |
| CN102010940A (en) * | 2010-12-24 | 2011-04-13 | 攀枝花钢城集团有限公司 | Laser surface treatment method of pass roll |
| JP2015135261A (en) * | 2014-01-17 | 2015-07-27 | Ｊｆｅスチール株式会社 | Leakage magnetic flux method and leakage magnetic flux device for flaw detection of thin steel strip |
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