CN108342727A - A kind of laser strengthening method of straightening roll - Google Patents
A kind of laser strengthening method of straightening roll Download PDFInfo
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- CN108342727A CN108342727A CN201810170179.3A CN201810170179A CN108342727A CN 108342727 A CN108342727 A CN 108342727A CN 201810170179 A CN201810170179 A CN 201810170179A CN 108342727 A CN108342727 A CN 108342727A
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- straightening roll
- roller surface
- laser
- cladding
- aligning
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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
- C23C24/106—Coating with metal alloys or metal elements only
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
- C22C38/34—Ferrous alloys, e.g. steel alloys containing chromium with more than 1.5% by weight of silicon
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
- C22C38/40—Ferrous alloys, e.g. steel alloys containing chromium with nickel
- C22C38/56—Ferrous alloys, e.g. steel alloys containing chromium with nickel with more than 1.7% by weight of carbon
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Mechanical Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Laser Beam Processing (AREA)
- Straightening Metal Sheet-Like Bodies (AREA)
Abstract
A kind of laser strengthening method of straightening roll, it includes the following steps：(1) pass through the straightening roll working surface after numerically controlled lathe cutting abrasion；(2) acetone or washes of absolute alcohol are used；(3) magnetic powder inspection and ultrasonic examination are used；(4) to the aligning uniform brushing machine oil of roller surface, oil film is formed；(5) alloying powder is equably sprayed on aligning roller surface by electrodusting device, forms alloy coat；(6) straightening roll is fixed on high-power semiconductor laser machining tool and carries out laser melting coating；(7) nondestructive inspection is carried out to the straightening roll after cladding；(8) aligning roller surface is processed by shot blasting.Present invention process is simple, and controllability is strong, energy conservation and environmental protection, can significantly improve straightening roll service life after reinforcing.
Description
The invention belongs to field of machining, more particularly to a kind of laser strengthening methods of straightening roll for technical field.
For background technology in the Rolling production of steel, straightening roll is the pass aligned to metal bar, proximate matter, wire rod
Key member.There are obvious bendings after flying shear for bar, proximate matter etc., so that influence the flowing in finishing procedure.By rectifying
To steel length and circumferencial direction continuous longitudinally and radially flexible deformation and plastic deformation occur for straight roller, to reach aligning
Purpose.Modern steel enterprise, more and more high rigidity, high abrasion material are used in the manufacture of bar, proximate matter and wire rod, to rectifying
Higher requirements are also raised for straight roller.Straightening roll subjects prodigious rolling stress, frictional force, bending stress during the work time
Deng effect, be easy on straightening roll working surface generate fatigue, abrasion etc. failure modes, directly affect final product quality.Aligning
The quality and service life of roller have become one of the key factor for directly affecting product quality and production cost.
Being designed to provide for invention content patent of the present invention is a kind of simple for process, and controllability is strong, of low cost, energy saving
The laser strengthening method of the straightening roll of environmental protection.
Technical scheme is as follows：
(1) by the straightening roll working surface after numerically controlled lathe cutting abrasion, turning thickness is 2~6mm, removes worksheet
The corrosion in face and fatigue layer；
(2) straightening roll after acetone or washes of absolute alcohol turning is used, degreases and waits impurity；
(3) magnetic powder inspection and ultrasonic examination are used, checks the defects of straightening roll whether there is surface and underbead crack；
(4) to the aligning uniform brushing machine oil of roller surface, oil film thickness is 0.05~0.1mm；
(5) alloy powder is equably sprayed on aligning roller surface by electrodusting device, the oil film for aligning roller surface is inhaled
Attached alloy powder forms coating, and coating layer thickness is 0.5~0.8mm.The alloying powder, mass percent are：Ni 4~
5%, Cr 30~31%, C 3.0~3.5%, Si 3.0~3.4%, surplus Fe.Alloying powder mesh number is 135~325
Mesh.
(6) straightening roll is fixed on high-power semiconductor laser numerical control machine tool, laser processing parameter is：Laser
Hot spot be 2 × 14mm rectangular light spots, scan power be 2500~3500W, 650~1200mm/min of sweep speed, by swash
Optical scanning alloy powder coating obtains alloy cladding layer in aligning roller surface, and when cladding is passed through nitrogen to molten bath and is protected；
(7) the defects of surface dye penetrant inspection being carried out to the straightening roll after cladding, having detected whether crackle；
(8) to examining qualified aligning roller surface to be processed by shot blasting so that straightening roll surface smoothness meets production and wants
It asks.
The present invention has the following advantages that compared with prior art：
1, laser melting coating Energy distribution is intensive, and deformation is small, is metallurgical binding between cladding alloy-layer and matrix.
2, due to laser melting coating super rapid heating and cooling feature so that laser cladding layer tissue realizes impulse hardening,
Straightening roll surface cladding alloy after reinforcing realizes fine, has obtained the institutional frameworks such as the martensite of high intensity, high rigidity,
So that straightening roll service life improves 2 times or more after cladding.
3, The present invention reduces the replacement number of straightening roll, production cost is reduced, improves Rolling Production efficiency.
Specific implementation mode
Embodiment 1
First by the straightening roll working surface after numerically controlled lathe cutting abrasion, turning thickness is 2mm, removes working surface
Corrosion and fatigue layer；The straightening roll after turning is cleaned using acetone, degreases and waits impurity；Using magnetic powder inspection and ultrasonic wave
Flaw detection checks the defects of straightening roll whether there is surface and underbead crack；Machine oil is uniformly painted on to straightening roll table using hairbrush
Face forms the oil film of 0.05mm thickness on surface；Alloy powder is equably sprayed on aligning roller surface by electrodusting device, is rectified
The oil film absorption alloy powder of straight roller surface forms coating, coating layer thickness 0.5mm.The alloying powder, quality percentage
Than for：Ni 4%, Cr 30%, C 3.0%, Si 3.0%, surplus Fe.Alloying powder mesh number is 135~325 mesh；It will rectify
Straight roller is fixed on high-power semiconductor laser numerical control machine tool, and laser processing parameter is：The hot spot of laser be 2 ×
14mm rectangular light spots, scan power 2500W, sweep speed 650mm/min are being rectified by laser scanning alloy powder coating
Straight roller surface obtains alloy cladding layer, and being passed through nitrogen to molten bath in cladding is protected；Surface is carried out to the straightening roll after cladding
Dye penetrant inspection, the defects of having detected whether crackle；To examining qualified aligning roller surface to be processed by shot blasting so that straightening roll table
Face finish meets production requirement.
Embodiment 2
First by the straightening roll working surface after numerically controlled lathe cutting abrasion, turning thickness is 6mm, removes working surface
Corrosion and fatigue layer；Using the straightening roll after washes of absolute alcohol turning, degrease equal impurity；Using magnetic powder inspection and surpass
Sonic flaw detection checks the defects of straightening roll whether there is surface and underbead crack；Machine oil is uniformly painted on to aligning using hairbrush
Roller surface forms the oil film of 0.1mm thickness on surface；Alloy powder is equably sprayed on straightening roll table by electrodusting device
Face, the oil film absorption alloy powder for aligning roller surface form coating, coating layer thickness 0.8mm.The alloying powder, quality
Percentage is：Ni 5%, Cr 31%, C 3.5%, Si 3.4%, surplus Fe.Alloying powder mesh number is 135~325
Mesh；Straightening roll is fixed on high-power semiconductor laser numerical control machine tool, laser processing parameter is：The hot spot of laser is
2 × 14mm rectangular light spots, scan power 3500W, sweep speed 1200mm/min, by laser scanning alloy powder coating,
Alloy cladding layer is obtained in aligning roller surface, being passed through nitrogen to molten bath in cladding is protected；Straightening roll after cladding is carried out
Surface dye penetrant inspection, the defects of having detected whether crackle；To examining qualified aligning roller surface to be processed by shot blasting so that aligning
Roller surface finish meets production requirement.
Embodiment 3
First by the straightening roll working surface after numerically controlled lathe cutting abrasion, turning thickness is 3mm, removes working surface
Corrosion and fatigue layer；The straightening roll after turning is cleaned using acetone, degreases and waits impurity；Using magnetic powder inspection and ultrasonic wave
Flaw detection checks the defects of straightening roll whether there is surface and underbead crack；Machine oil is uniformly painted on to straightening roll table using hairbrush
Face forms the oil film of 0.06mm thickness on surface；Alloy powder is equably sprayed on aligning roller surface by electrodusting device, is rectified
The oil film absorption alloy powder of straight roller surface forms coating, coating layer thickness 0.7mm.The alloying powder, quality percentage
Than for：Ni 4%, Cr 31%, C 3.5%, Si 3.4%, surplus Fe.Alloying powder mesh number is 135~325 mesh；It will rectify
Straight roller is fixed on high-power semiconductor laser numerical control machine tool, and laser processing parameter is：The hot spot of laser be 2 ×
14mm rectangular light spots, scan power 3000W, sweep speed 800mm/min are being rectified by laser scanning alloy powder coating
Straight roller surface obtains alloy cladding layer, and being passed through nitrogen to molten bath in cladding is protected；Surface is carried out to the straightening roll after cladding
Dye penetrant inspection, the defects of having detected whether crackle；To examining qualified aligning roller surface to be processed by shot blasting so that straightening roll table
Face finish meets production requirement.
Embodiment 4
First by the straightening roll working surface after numerically controlled lathe cutting abrasion, turning thickness is 4mm, removes working surface
Corrosion and fatigue layer；Using the straightening roll after washes of absolute alcohol turning, degrease equal impurity；Using magnetic powder inspection and surpass
Sonic flaw detection checks the defects of straightening roll whether there is surface and underbead crack；Machine oil is uniformly painted on to aligning using hairbrush
Roller surface forms the oil film of 0.08mm thickness on surface；Alloy powder is equably sprayed on straightening roll table by electrodusting device
Face, the oil film absorption alloy powder for aligning roller surface form coating, coating layer thickness 0.8mm.The alloying powder, quality
Percentage is：Ni 4%, Cr 31%, C 3.0%, Si 3.0%, surplus Fe.Alloying powder mesh number is 135~325
Mesh；Straightening roll is fixed on high-power semiconductor laser numerical control machine tool, laser processing parameter is：The hot spot of laser is
2 × 14mm rectangular light spots, scan power 2800W, sweep speed 750mm/min, by laser scanning alloy powder coating,
Aligning roller surface obtains alloy cladding layer, and being passed through nitrogen to molten bath in cladding is protected；Table is carried out to the straightening roll after cladding
Face colouring is detected a flaw, the defects of having detected whether crackle；To examining qualified aligning roller surface to be processed by shot blasting so that straightening roll
Surface smoothness meets production requirement.
Embodiment 5
First by the straightening roll working surface after numerically controlled lathe cutting abrasion, turning thickness is 5mm, removes working surface
Corrosion and fatigue layer；Using the straightening roll after washes of absolute alcohol turning, degrease equal impurity；Using magnetic powder inspection and surpass
Sonic flaw detection checks the defects of straightening roll whether there is surface and underbead crack；Machine oil is uniformly painted on to aligning using hairbrush
Roller surface forms the oil film of 0.05mm thickness on surface；Alloy powder is equably sprayed on straightening roll table by electrodusting device
Face, the oil film absorption alloy powder for aligning roller surface form coating, coating layer thickness 0.5mm.The alloying powder, quality
Percentage is：Ni 4%, Cr 30%, C 3.5%, Si 3.4%, surplus Fe.Alloying powder mesh number is 135~325
Mesh；Straightening roll is fixed on high-power semiconductor laser numerical control machine tool, laser processing parameter is：The hot spot of laser is
2 × 14mm rectangular light spots, scan power 3200W, sweep speed 900mm/min, by laser scanning alloy powder coating,
Aligning roller surface obtains alloy cladding layer, and being passed through nitrogen to molten bath in cladding is protected；Table is carried out to the straightening roll after cladding
Face colouring is detected a flaw, the defects of having detected whether crackle；To examining qualified aligning roller surface to be processed by shot blasting so that straightening roll
Surface smoothness meets production requirement.
Embodiment 6
First by the straightening roll working surface after numerically controlled lathe cutting abrasion, turning thickness is 4.5mm, removes worksheet
The corrosion in face and fatigue layer；The straightening roll after turning is cleaned using acetone, degreases and waits impurity；Using magnetic powder inspection and ultrasound
Wave inspection checks the defects of straightening roll whether there is surface and underbead crack；Machine oil is uniformly painted on straightening roll using hairbrush
Surface forms the oil film of 0.06mm thickness on surface；Alloy powder is equably sprayed on aligning roller surface by electrodusting device,
The oil film absorption alloy powder for aligning roller surface forms coating, coating layer thickness 0.8mm.The alloying powder, quality hundred
Point ratio is：Ni 5%, Cr 31%, C 3.0%, Si 3.4%, surplus Fe.Alloying powder mesh number is 135~325 mesh；It will
Straightening roll is fixed on high-power semiconductor laser numerical control machine tool, and laser processing parameter is：The hot spot of laser be 2 ×
14mm rectangular light spots, scan power 3300W, sweep speed 1100mm/min are being rectified by laser scanning alloy powder coating
Straight roller surface obtains alloy cladding layer, and being passed through nitrogen to molten bath in cladding is protected；Surface is carried out to the straightening roll after cladding
Dye penetrant inspection, the defects of having detected whether crackle；To examining qualified aligning roller surface to be processed by shot blasting so that straightening roll table
Face finish meets production requirement.
Embodiment 7
First by the straightening roll working surface after numerically controlled lathe cutting abrasion, turning thickness is 2.5mm, removes worksheet
The corrosion in face and fatigue layer；The straightening roll after turning is cleaned using acetone, degreases and waits impurity；Using magnetic powder inspection and ultrasound
Wave inspection checks the defects of straightening roll whether there is surface and underbead crack；Machine oil is uniformly painted on straightening roll using hairbrush
Surface forms the oil film of 0.05mm thickness on surface；Alloy powder is equably sprayed on aligning roller surface by electrodusting device,
The oil film absorption alloy powder for aligning roller surface forms coating, coating layer thickness 0.75mm.The alloying powder, quality hundred
Point ratio is：Ni 4%, Cr 30%, C 3.5%, Si 3.4%, surplus Fe.Alloying powder mesh number is 135~325 mesh；
Straightening roll is fixed on high-power semiconductor laser numerical control machine tool, laser processing parameter is：The hot spot of laser be 2 ×
14mm rectangular light spots, scan power 3400W, sweep speed 1150mm/min are being rectified by laser scanning alloy powder coating
Straight roller surface obtains alloy cladding layer, and being passed through nitrogen to molten bath in cladding is protected；Surface is carried out to the straightening roll after cladding
Dye penetrant inspection, the defects of having detected whether crackle；To examining qualified aligning roller surface to be processed by shot blasting so that straightening roll table
Face finish meets production requirement.
Embodiment 8
First by the straightening roll working surface after numerically controlled lathe cutting abrasion, turning thickness is 6mm, removes working surface
Corrosion and fatigue layer；Using the straightening roll after washes of absolute alcohol turning, degrease equal impurity；Using magnetic powder inspection and surpass
Sonic flaw detection checks the defects of straightening roll whether there is surface and underbead crack；Machine oil is uniformly painted on to aligning using hairbrush
Roller surface forms the oil film of 0.1mm thickness on surface；Alloy powder is equably sprayed on straightening roll table by electrodusting device
Face, the oil film absorption alloy powder for aligning roller surface form coating, coating layer thickness 0.8mm.The alloying powder, quality
Percentage is：Ni 5%, Cr 31%, C 3.5%, Si 3.4%, surplus Fe.Alloying powder mesh number is 135~325
Mesh；Straightening roll is fixed on high-power semiconductor laser numerical control machine tool, laser processing parameter is：The hot spot of laser is
2 × 14mm rectangular light spots, scan power 3450W, sweep speed 1150mm/min, by laser scanning alloy powder coating,
Alloy cladding layer is obtained in aligning roller surface, being passed through nitrogen to molten bath in cladding is protected；Straightening roll after cladding is carried out
Surface dye penetrant inspection, the defects of having detected whether crackle；To examining qualified aligning roller surface to be processed by shot blasting so that aligning
Roller surface finish meets production requirement.
Alloy-layer of the method cladding of the present invention on straightening roll：It is many resistance to due to containing in alloying powder used in cladding
The good alloying component of mill property, hence it is evident that improve the hardness of straightening roll, wear-resisting property after cladding.Contrast test data are as follows：
One, hardness balance tests
Alloy cladding layer performance detection, hardness are HRC60~63,
Former straightening roll case hardness is HRC50 or so.
Two, wearability detects
Relative wear coefficient is the major parameter assessed material wear ability in engineering and research, friction-wear test
It is the major criterion for evaluating material physical property.Omnipotent friction wear testing machine can be under certain contact, to roll, slide
The form of dynamic friction, in the wider range of speeds, for evaluating the friction and wear behavior of material.
This experiment is using the omnipotent friction wear testing machine of MMW-1 types to Laser Clad Alloy Coatings and plating hard chromium layers
Test specimen carries out abrasion test.Select be thrust ring friction pair tested, thrust ring friction pair may be implemented to test ring with
The measurement of disk different materials friction coefficient is tried, and test ring bottom surface is all contacted with mill, is reduced because of machining accuracy error pair
The influence of test result.The parameter of abrasion tester is as follows：The test force working range of friction wear testing machine is 0~1000N,
0~2000r/min of range of spindle speeds, time control range 1s~9999min.When setting test force, the speed of mainshaft and experiment
Between, it is calculated finally by weighing, obtains relative wear coefficient.
The setup parameter of this experiment frictional wear experiment is：Test force 800N tests test ring rotating speed 200r/min, when experiment
Between be 20min.The wear extent of small test ring can be measured with weight method, each experiment a ten thousandth electronic balance claims
Weight is averaged twice, is then calculated weightless, there is shown relative wear coefficient.What is selected is thrust ring lab scale disk and small test ring,
What thrust ring lab scale disk was selected is 45 steel quenching parts, and small test ring selects former straightening roll and cladding alloy-layer to align roll material respectively
Test specimen.Each 3 of the test specimen of alloy layer clad on surface and former straightening roll is prepared, number is H1, H2, H3 (cladding alloys respectively
Aligning roll material afterwards)；Y1, Y2, Y3 (original aligning roll material).
The results are shown in table below for wear-resisting property contrast test：
The result shows that the more former straightening roll of the wearability of straightening roll improves more than 2 times after laser melting coating.
Claims (4)
1. a kind of laser strengthening method of straightening roll, it is characterized in that：It includes the following steps：
(1) by the straightening roll working surface after numerically controlled lathe cutting abrasion, turning thickness is 2~6mm；
(2) straightening roll after acetone or washes of absolute alcohol turning is used；
(3) magnetic powder inspection and ultrasonic examination are used, checks that straightening roll whether there is surface and underbead crack defect；
(4) to the aligning uniform brushing machine oil of roller surface, oil film thickness is 0.05~0.1mm；
(5) alloy powder is equably sprayed on aligning roller surface by electrodusting device, the oil film absorption for aligning roller surface is closed
Bronze end forms coating, and coating layer thickness is 0.5~0.8mm；
(6) straightening roll is fixed on high-power semiconductor laser numerical control machine tool, sets laser processing parameter, passes through laser
Alloy powder coating is scanned, alloy cladding layer is obtained in aligning roller surface, when cladding is passed through nitrogen to molten bath and is protected；
(7) the defects of surface dye penetrant inspection being carried out to the straightening roll after cladding, having detected whether crackle；
(8) to examining qualified aligning roller surface to be processed by shot blasting.
2. the laser strengthening method of straightening roll according to claim 1, it is characterized in that：The alloying powder, quality
Percentage is：Ni 4~5%, Cr 30~31%, C 3.0~3.5%, Si 3.0~3.4%, surplus Fe.
3. the laser strengthening method of straightening roll according to claim 1 or 2, it is characterized in that：Alloying powder mesh number is 135
~325 mesh.
4. the laser strengthening method of straightening roll according to claim 1, it is characterized in that：The laser processing parameter is：Swash
The hot spot of light device is 2 × 14mm rectangular light spots, and scan power is 2500~3500W, 650~1200mm/min of sweep speed.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810170179.3A CN108342727A (en) | 2018-03-01 | 2018-03-01 | A kind of laser strengthening method of straightening roll |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810170179.3A CN108342727A (en) | 2018-03-01 | 2018-03-01 | A kind of laser strengthening method of straightening roll |
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| CN108342727A true CN108342727A (en) | 2018-07-31 |
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| CN201810170179.3A Pending CN108342727A (en) | 2018-03-01 | 2018-03-01 | A kind of laser strengthening method of straightening roll |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109234662A (en) * | 2018-11-27 | 2019-01-18 | 梁醒宁 | A kind of subsonic speed laser spraying technique suitable for rectangular light spot |
| CN109852966A (en) * | 2019-04-16 | 2019-06-07 | 鞍山正发表面技术工程股份有限公司 | A kind of heavy rail straightening guide roller laser cladding method |
| CN110216381A (en) * | 2019-06-19 | 2019-09-10 | 燕山大学 | A method of the laser melting coating based on double-sided adhesive metal powder film fore-put powder repairs mill housing |
| CN110257817A (en) * | 2019-01-19 | 2019-09-20 | 天津北基新激光科技有限公司 | The restorative procedure of roll bearing position |
| CN115058564A (en) * | 2022-05-25 | 2022-09-16 | 新疆八一钢铁股份有限公司 | Manufacturing method of withdrawal and straightening machine roller |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109234662A (en) * | 2018-11-27 | 2019-01-18 | 梁醒宁 | A kind of subsonic speed laser spraying technique suitable for rectangular light spot |
| CN110257817A (en) * | 2019-01-19 | 2019-09-20 | 天津北基新激光科技有限公司 | The restorative procedure of roll bearing position |
| CN109852966A (en) * | 2019-04-16 | 2019-06-07 | 鞍山正发表面技术工程股份有限公司 | A kind of heavy rail straightening guide roller laser cladding method |
| CN110216381A (en) * | 2019-06-19 | 2019-09-10 | 燕山大学 | A method of the laser melting coating based on double-sided adhesive metal powder film fore-put powder repairs mill housing |
| CN115058564A (en) * | 2022-05-25 | 2022-09-16 | 新疆八一钢铁股份有限公司 | Manufacturing method of withdrawal and straightening machine roller |
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