CN105297009A - Laser-cladding repairing process for centering roller - Google Patents
Laser-cladding repairing process for centering roller Download PDFInfo
- Publication number
- CN105297009A CN105297009A CN201510835805.2A CN201510835805A CN105297009A CN 105297009 A CN105297009 A CN 105297009A CN 201510835805 A CN201510835805 A CN 201510835805A CN 105297009 A CN105297009 A CN 105297009A
- Authority
- CN
- China
- Prior art keywords
- cladding
- laser
- centring roll
- layer
- cladding layer
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Classifications
-
- 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
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C19/00—Alloys based on nickel or cobalt
- C22C19/07—Alloys based on nickel or cobalt based on cobalt
Landscapes
- 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)
Abstract
The invention relates to a laser-cladding repairing process for a centering roller. The abraded surface of the centering roller is repaired through modified laser cladding, meanwhile, the corrosion and abrasion resistance performance of the centering roller is improved, and the service life and the replacement cycle of the centering roller are effectively prolonged. The process comprises the following steps of (1) surface treatment on the centering roller needing repairing, (2) clamping and aligning, (3) laser-cladding repairing and (4) detection, flaw detection and machining. Compared with the prior art, the laser-cladding repairing process has the beneficial effects that (1) compared with a traditional cladding mode, a cladding layer formed by modified cladding is basically uniform in thickness, the cladding efficiency is improved by 10-20 times, and the production cost is low; (2) the bonding strength of a base body and the laser cladding layer is not lower than 90% of that of an original base material, and the cladding layer and an interface of the cladding layer are compact in structure, fine in grain and free of the defects of holes, slag inclusion, cracks and the like; (3) the surface hardness of a repaired layer is HV450-550, and the repaired centering roller has better high-temperature abrasion resistance performance, high creep limit, good endurance strength and better thermal fatigue and breakage resistance performance.
Description
Technical field
The present invention relates to laser melting and coating technique field, particularly relate to the processing method that a kind of centring roll generally used in iron and steel metallurgy enterprise carries out laser melting coating reparation.
Background technology
Anshan iron and steel plant large-scale factory centering roller-way is positioned at the work roll table for rail conveying before and after universal mill, and its centring roll material is 35# steel, and surface does not have thermal treatment hard formation.Centering roller-way is arranged on before and after universal rolling mill, and under roller-way normality, temperature is 150 ~ 200 DEG C, during rolling, and steel billet temperature is 1050 DEG C, and the temperature of centring roll and steel billet contact surface can reach 500 ~ 600 DEG C, and roll body adopts naturally cooling.
In practical work process, generally using 15 ~ 20 days, will there is groove because of wearing and tearing in centring roll, the degree of depth of groove is about 8 ~ 10mm, because the position of centering roller-way is close to milling train, so the scope of centring roll surface abrasion is also comparatively large, the width of greatest wear is about about 800mm.Can certain influence be produced to the surface quality of rail after there is groove because centring roll is surperficial, therefore need when scheduled maintenance to change.But affect by centering roller-way is integrally-built, change the time that a centring roll needs 14 hours, and scheduled maintenance generally only has the time of 10 hours, cannot complete the replacing of centring roll within the periodical repair time.
Then the method can only polished by online Electric Welding Buttering Technique at present carries out local route repair to its damage location, because electric welding material does not have good wear resisting property, add the limited precision of polishing, therefore centring roll work there will be wearing and tearing again after 15 days, and more and more serious.
Summary of the invention
The invention provides a kind of laser cladding repair technique of centring roll, adopt laser modified cladding to realize the reparation of centring roll wearing surface, improve the processing method of centring roll anti-corrosion wear performance simultaneously, effectively extend work-ing life and the replacement cycle of centring roll.
In order to achieve the above object, the present invention realizes by the following technical solutions:
A laser cladding repair technique for centring roll, adopts laser modified cladding to realize the reparation of centring roll wearing surface, improves centring roll anti-corrosion wear performance simultaneously, effectively extends work-ing life and the replacement cycle of centring roll; Comprise the steps:
1) surface treatment is carried out to the centring roll that need repair;
2) centring roll after surface treatment is installed on laser process machine, two ends utilize the top centering of lathe;
3) application crossing current CO
2laser apparatus wide band laser cladding technology, adopts the mode cladding of coaxial powder-feeding, concrete technology parameter:
Laser power: 3200W ~ 8000W
Spot size: (3-15) × (0.5-5) mm
Amount of lap: 0.7 ~ 4mm
The speed of coaxial powder-feeding: 15 ~ 20g/min
The speed of laser scanning: 300 ~ 600mm/min
Laser melting coating metal powder component and weight percent content: Cr:17%, Mo:5%, W:12%, Ti:3%, Ta:2%, W:2%, Ni:6%, Co: surplus; Each component weight percent content former content ± 5% scope in adjustment;
4) Surface testing, adopt PT flaw detection, qualified rear lathe is machined to drawing requirement size.
Described step 1) comprising: centring roll car is put down by a. lathe, removes fatigue layer 1 ~ 3mm; B. adopt PT flaw detection, guarantee that matrix does not have the defect such as crackle, pore, as defectiveness adopts manual grinding method to remove; C. with the greasy dirt impurity on acetone erasing surface.
Described step 3) carry out cladding operation time, laminar smelting and coating from lower-most point, the thickness of the first layer cladding layer is 0.7 ~ 1.2mm, and before later layer cladding layer Thickness Ratio, one deck cladding layer increases by 0.2 ~ 0.4mm, 4 ~ 6mm and later layer cladding layer outer the past one deck cladding layer outer stretches out.
Compared with prior art, the invention has the beneficial effects as follows:
1) compared with traditional cladding mode, the cladding layer thickness of modification cladding is basically identical, and cladding efficiency improves 10 ~ 20 times, and production cost is low.
2) bonding strength of matrix and laser cladding layer is not less than 90% of former base material; Cladding layer and Interface Microstructure densification thereof, crystal grain is tiny, does not have the defects such as hole, slag inclusion, crackle;
3) repair layer surface hardness is HV450-550, has higher high temperature wear resistant performance, has good creeping limit, good creep rupture strength and good thermal fatigue resistance and fracture property simultaneously.
Embodiment
A laser cladding repair technique for centring roll, adopts laser modified cladding to realize the reparation of centring roll wearing surface, improves centring roll anti-corrosion wear performance simultaneously, effectively extends work-ing life and the replacement cycle of centring roll; Comprise the steps:
1) surface treatment is carried out to the centring roll that need repair;
2) centring roll after surface treatment is installed on laser process machine, two ends utilize the top centering of lathe;
3) application crossing current CO
2laser apparatus wide band laser cladding technology, adopts the mode cladding of coaxial powder-feeding, concrete technology parameter:
Laser power: 3200W ~ 8000W
Spot size: (3-15) × (0.5-5) mm
Amount of lap: 0.7 ~ 4mm
The speed of coaxial powder-feeding: 15 ~ 20g/min
The speed of laser scanning: 300 ~ 600mm/min
Laser melting coating metal powder component and weight percent content: Cr:17%, Mo:5%, W:12%, Ti:3%, Ta:2%, W:2%, Ni:6%, Co: surplus; Each component weight percent content former content ± 5% scope in adjustment;
4) Surface testing, adopt PT flaw detection, qualified rear lathe is machined to drawing requirement size.
Described step 1) comprising: centring roll car is put down by a. lathe, removes fatigue layer 1 ~ 3mm; B. adopt PT flaw detection, guarantee that matrix does not have the defect such as crackle, pore, as defectiveness adopts manual grinding method to remove; C. with the greasy dirt impurity on acetone erasing surface.
Described step 3) carry out cladding operation time, laminar smelting and coating from lower-most point, the thickness of the first layer cladding layer is 0.7 ~ 1.2mm, and before later layer cladding layer Thickness Ratio, one deck cladding layer increases by 0.2 ~ 0.4mm, 4 ~ 6mm and later layer cladding layer outer the past one deck cladding layer outer stretches out.
Following examples are implemented under premised on technical solution of the present invention, give detailed embodiment and concrete operating process, but protection scope of the present invention are not limited to following embodiment.In following embodiment, method therefor is ordinary method if no special instructions.
[embodiment 1] Anshan iron and steel plant large-scale factory centring roll is repaired
Centring roll basic condition:
Specification: Φ 310 × 100mm; Weight: 500kg/ only; Material: 35# cast steel.
Operating mode: transporting steel billet and roll rear rail, steel billet temperature 1050 DEG C, under roller-way normality 150 ~ 200 DEG C, contact surface temperature can reach 500 ~ 600 DEG C, roll body naturally cooling.
Repair process is as follows;
With lathe, centring roll car is put down, remove fatigue layer 2mm; Adopt PT flaw detection, adopt manual grinding method to remove defect; With the greasy dirt impurity on acetone erasing surface.
Centring roll after surface treatment is installed on laser process machine, and two ends utilize the top centering of lathe;
Melting and coating process parameter:
Laser power: 3800 ~ 4200W, spot size: 10 × 2mm, amount of lap: 2.5mm, the speed of coaxial powder-feeding: 16g/min, laser scanning speed: 300mm/min.
Laser melting coating metal powder component and weight percent content: Cr:15%, Mo:5%, W:10%, Ti:3%, Ta:2%, W:2%, Ni:6%, Co: surplus;
When carrying out cladding operation, laminar smelting and coating from lower-most point, the thickness of the first layer cladding layer is 1.2mm, and before later layer cladding layer Thickness Ratio, one deck cladding layer increases 0.2mm, the 4mm and later layer cladding layer outer the past one deck cladding layer outer stretches out.
Surface testing, adopt PT flaw detection, qualified rear lathe is machined to drawing requirement size.
Centring roll on-line running 30 months after laser melting coating is repaired, its life-span reaches more than 30 times of former new product life-span.
Large-scale factory of [embodiment 2] Baogang centring roll is repaired
Centring roll basic condition:
Specification: Φ 290 × 100mm; Weight: 500kg/ only; Material: 35# cast steel.
Operating mode: transporting steel billet and roll rear rail, steel billet temperature 1030 DEG C, under roller-way normality 150 ~ 200 DEG C, contact surface temperature can reach 500 ~ 600 DEG C, roll body naturally cooling.
Repair process is as follows;
With lathe, centring roll car is put down, remove fatigue layer 1mm; Adopt PT flaw detection, adopt manual grinding method to remove defect; With the greasy dirt impurity on acetone erasing surface.
Centring roll after surface treatment is installed on laser process machine, and two ends utilize the top centering of lathe;
Melting and coating process parameter: laser power: 3800W ~ 4200W, spot diameter: 10 × 2mm, amount of lap: 2.5mm, the speed of coaxial powder-feeding: 20g/min, laser scanning speed 600mm/min.
Laser melting coating metal powder component and weight percent content: Cr:17%, Mo:5%, W:12%, Ti:3%, Ta:2%, W:2%, Ni:6%, Co: surplus;
When carrying out cladding operation, laminar smelting and coating from lower-most point, the thickness of the first layer cladding layer is 1.4mm, and before later layer cladding layer Thickness Ratio, one deck cladding layer increases 0.2mm, the 5mm and later layer cladding layer outer the past one deck cladding layer outer stretches out.
Surface testing, adopt PT flaw detection, qualified rear lathe is machined to drawing requirement size.
Centring roll on-line running 28 months after laser melting coating is repaired, its life-span reaches more than 25 times of former new product life-span.
[embodiment 3] Baosteel medium-sized factory centring roll is repaired
Centring roll basic condition:
Specification: Φ 260 × 100mm; Weight: 420kg/ only; Material: 35# cast steel.
Operating mode: transporting steel billet and roll rear rail, steel billet temperature 1060 DEG C, under roller-way normality 150 ~ 200 DEG C, contact surface temperature can reach 500 ~ 600 DEG C, roll body naturally cooling.
Repair process is as follows;
With lathe, centring roll car is put down, remove fatigue layer 1.5mm; Adopt PT flaw detection, adopt manual grinding method to remove defect; With the greasy dirt impurity on acetone erasing surface.
Centring roll after surface treatment is installed on laser process machine, and two ends utilize the top centering of lathe;
Melting and coating process parameter: laser power: 3800 ~ 4200W, spot diameter: 10 × 2mm, amount of lap: 2.5mm, the speed of coaxial powder-feeding: 18g/min, laser scanning speed 500mm/min.
Laser melting coating metal powder component and weight percent content: Cr:16%, Mo:4%, W:13%, Ti:3%, Ta:2%, W:2%, Ni:5%, Co: surplus;
When carrying out cladding operation, laminar smelting and coating from lower-most point, the thickness of the first layer cladding layer is 1.4mm, and before later layer cladding layer Thickness Ratio, one deck cladding layer increases 0.4mm, the 6mm and later layer cladding layer outer the past one deck cladding layer outer stretches out.
Surface testing, adopt PT flaw detection, qualified rear lathe is machined to drawing requirement size.
Centring roll on-line running 25 months after laser melting coating is repaired, its life-span reaches more than 20 times of former new product life-span.
Claims (3)
1. a laser cladding repair technique for centring roll, adopts laser modified cladding to realize the reparation of centring roll wearing surface, improves centring roll anti-corrosion wear performance simultaneously, effectively extends work-ing life and the replacement cycle of centring roll; It is characterized in that, comprise the steps:
1) surface treatment is carried out to the centring roll that need repair;
2) centring roll after surface treatment is installed on laser process machine, two ends utilize the top centering of lathe;
3) application crossing current CO
2laser apparatus wide band laser cladding technology, adopts the mode cladding of coaxial powder-feeding, concrete technology parameter:
Laser power: 3200W ~ 8000W
Spot size: (3-15) × (0.5-5) mm
Amount of lap: 0.7 ~ 4mm
The speed of coaxial powder-feeding: 15 ~ 20g/min
The speed of laser scanning: 300 ~ 600mm/min
Laser melting coating metal powder component and weight percent content: Cr:17%, Mo:5%, W:12%, Ti:3%, Ta:2%, W:2%, Ni:6%, Co: surplus; Each component weight percent content former content ± 5% scope in adjustment;
4) Surface testing, adopt PT flaw detection, qualified rear lathe is machined to drawing requirement size.
2. the laser cladding repair technique of a kind of centring roll according to claim 1, is characterized in that, described step 1) comprising: centring roll car is put down by a. lathe, removes fatigue layer 1 ~ 3mm; B. adopt PT flaw detection, guarantee that matrix does not have the defect such as crackle, pore, as defectiveness adopts manual grinding method to remove; C. with the greasy dirt impurity on acetone erasing surface.
3. the laser cladding repair technique of a kind of centring roll according to claim 1, it is characterized in that, described step 3) carry out cladding operation time, laminar smelting and coating from lower-most point, the thickness of the first layer cladding layer is 0.7 ~ 1.2mm, before later layer cladding layer Thickness Ratio, one deck cladding layer increases by 0.2 ~ 0.4mm, 4 ~ 6mm and later layer cladding layer outer the past one deck cladding layer outer stretches out.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510835805.2A CN105297009A (en) | 2015-11-26 | 2015-11-26 | Laser-cladding repairing process for centering roller |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510835805.2A CN105297009A (en) | 2015-11-26 | 2015-11-26 | Laser-cladding repairing process for centering roller |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN105297009A true CN105297009A (en) | 2016-02-03 |
Family
ID=55194802
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510835805.2A Pending CN105297009A (en) | 2015-11-26 | 2015-11-26 | Laser-cladding repairing process for centering roller |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN105297009A (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108165983A (en) * | 2017-12-28 | 2018-06-15 | 沈阳大陆激光技术有限公司 | A kind of laser repair method of mobile cross head |
| CN110273150A (en) * | 2019-07-03 | 2019-09-24 | 中国石油集团渤海钻探工程有限公司 | A kind of superhard coating powder and its application |
| CN111975282A (en) * | 2020-08-21 | 2020-11-24 | 中国人民解放军第五七一九工厂 | TC4 titanium alloy blisk structure blade air inlet edge damage repair method |
| CN112981389A (en) * | 2019-12-14 | 2021-06-18 | 丹阳宏图激光科技有限公司 | Laser repair method for propeller shaft |
| CN113263053A (en) * | 2020-02-16 | 2021-08-17 | 晟通科技集团有限公司 | Repairing method for plate roller of foil rolling mill |
| CN114682988A (en) * | 2022-02-25 | 2022-07-01 | 郑州煤机综机设备有限公司 | Method for repairing high-hardness high-corrosion-resistance hydraulic support hinged shaft |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102691061A (en) * | 2012-06-11 | 2012-09-26 | 北京大陆天瑞激光工程技术有限公司 | Laser cladding manufacturing process for hot-rolled spheroidal graphite cast iron roller flat head |
| CN103290405A (en) * | 2013-05-22 | 2013-09-11 | 东北大学 | Method for preparing high-speed steel coating by carrying out laser cladding on surface of spheroidal graphite cast iron |
-
2015
- 2015-11-26 CN CN201510835805.2A patent/CN105297009A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102691061A (en) * | 2012-06-11 | 2012-09-26 | 北京大陆天瑞激光工程技术有限公司 | Laser cladding manufacturing process for hot-rolled spheroidal graphite cast iron roller flat head |
| CN103290405A (en) * | 2013-05-22 | 2013-09-11 | 东北大学 | Method for preparing high-speed steel coating by carrying out laser cladding on surface of spheroidal graphite cast iron |
Non-Patent Citations (1)
| Title |
|---|
| 臧辰峰等: "轧辊表面激光处理技术的研究进展", 《材料导报：综述篇》 * |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108165983A (en) * | 2017-12-28 | 2018-06-15 | 沈阳大陆激光技术有限公司 | A kind of laser repair method of mobile cross head |
| CN108165983B (en) * | 2017-12-28 | 2020-05-26 | 沈阳大陆激光技术有限公司 | Laser repairing method for mobile cross head |
| CN110273150A (en) * | 2019-07-03 | 2019-09-24 | 中国石油集团渤海钻探工程有限公司 | A kind of superhard coating powder and its application |
| CN112981389A (en) * | 2019-12-14 | 2021-06-18 | 丹阳宏图激光科技有限公司 | Laser repair method for propeller shaft |
| CN113263053A (en) * | 2020-02-16 | 2021-08-17 | 晟通科技集团有限公司 | Repairing method for plate roller of foil rolling mill |
| CN111975282A (en) * | 2020-08-21 | 2020-11-24 | 中国人民解放军第五七一九工厂 | TC4 titanium alloy blisk structure blade air inlet edge damage repair method |
| CN114682988A (en) * | 2022-02-25 | 2022-07-01 | 郑州煤机综机设备有限公司 | Method for repairing high-hardness high-corrosion-resistance hydraulic support hinged shaft |
| CN114682988B (en) * | 2022-02-25 | 2024-05-24 | 郑州煤机综机设备有限公司 | Repairing method of high-hardness high-corrosion-resistance hydraulic support hinge shaft |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN109468634B (en) | Process method for recovering precision of rolling mill step pad by laser cladding technology | |
| CN105297009A (en) | Laser-cladding repairing process for centering roller | |
| CN103668184B (en) | The laser repairing process of the vehicle mould of microstructure of surface cladding layer good uniformity | |
| CN102031519B (en) | Laser repair method for abraded centrifugal fan bearing block | |
| CN103255412B (en) | High hardness material laser cladding process method for roller work surface | |
| CN104148806B (en) | A kind of cast steel with high chromium roll top layer fatigue statistic rapid laser repair method | |
| CN111139464A (en) | High-speed wire rod roller repairing method based on laser cladding and repairing structure thereof | |
| CN109079421B (en) | A kind of method that locomotive buffer bar surface reconditioning remanufactures | |
| CN110747458A (en) | Method for repairing crankshaft of hot-rolling fixed-width press | |
| CN102728993A (en) | Method for repairing roller sleeve of continuous casting roller | |
| CN110284134B (en) | Laser cladding repair process for disc shear blade | |
| CN111485126B (en) | Preparation method of nickel-chromium-iron-cobalt-based deformed superalloy wire | |
| CN106381488B (en) | Preparation method of continuous casting crystallizer foot roller coating | |
| CN110052610B (en) | A kind of additive manufacturing method of cast iron roll | |
| CN109722662A (en) | A kind of laser melting coating restorative procedure of breast roll | |
| CN112725693A (en) | Alloy powder for laser repair of large fan main shaft and laser repair method | |
| CN104148874B (en) | Manual arc welding restorative procedure after the wearing and tearing of universal rolling mill vertical roll axle box bearing seat | |
| CN117467995B (en) | ZG40Mn2 guide groove laser repairing process based on ultra-thick cladding layer | |
| CN115110076B (en) | A method for ultra-high-speed laser cladding of ductile iron shaft parts | |
| CN103668180B (en) | With the laser repairing process of the compact vehicle mould in die wear position | |
| CN108165983A (en) | A kind of laser repair method of mobile cross head | |
| CN113621895B (en) | Laser cladding manufactured cold-rolled deburring roller functional layer alloy powder and preparation method thereof | |
| CN105349992A (en) | Laser cladding repairing method for airplane normal pin and bolt part surfaces | |
| CN215469320U (en) | Roller way roller remanufacturing device for laser cladding composite rolling | |
| CN108048836A (en) | A kind of laser repair method of rolling mill bearing |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20160203 |
|
| WD01 | Invention patent application deemed withdrawn after publication |