CN108048836A - A kind of laser repair method of rolling mill bearing - Google Patents

A kind of laser repair method of rolling mill bearing Download PDF

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Publication number
CN108048836A
CN108048836A CN201711453587.1A CN201711453587A CN108048836A CN 108048836 A CN108048836 A CN 108048836A CN 201711453587 A CN201711453587 A CN 201711453587A CN 108048836 A CN108048836 A CN 108048836A
Authority
CN
China
Prior art keywords
rolling mill
laser
mill bearing
repair method
bearing
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
Application number
CN201711453587.1A
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Chinese (zh)
Inventor
吴伟
李佳
王永新
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
DALU LASER TECHNOLOGY Co Ltd SHENYANG
Original Assignee
DALU LASER TECHNOLOGY Co Ltd SHENYANG
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by DALU LASER TECHNOLOGY Co Ltd SHENYANG filed Critical DALU LASER TECHNOLOGY Co Ltd SHENYANG
Priority to CN201711453587.1A priority Critical patent/CN108048836A/en
Publication of CN108048836A publication Critical patent/CN108048836A/en
Pending legal-status Critical Current

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Classifications

    • CCHEMISTRY; METALLURGY
    • C23COATING 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
    • C23CCOATING 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
    • C23C24/00Coating starting from inorganic powder
    • C23C24/08Coating starting from inorganic powder by application of heat or pressure and heat
    • C23C24/10Coating starting from inorganic powder by application of heat or pressure and heat with intermediate formation of a liquid phase in the layer
    • C23C24/103Coating with metallic material, i.e. metals or metal alloys, optionally comprising hard particles, e.g. oxides, carbides or nitrides
    • C23C24/106Coating with metal alloys or metal elements only

Abstract

The invention belongs to the maintenance technique fields of equipment, specifically provide a kind of renovation technique that rolling mill bearing is repaired using laser melting and coating technique.The renovation technique includes following steps:Step 1, rolling mill bearing seating face is detected;Step 2, to rolling mill bearing mechanical chipping;Step 3, laser cladding of material is prepared, carries out the laser repairing of rolling mill bearing;Step 4, detected after the mechanical processing of rolling mill bearing and reparation.The renovation technique of the present invention is easy to operate, is suitble to industrially promote the use of.

Description

A kind of laser repair method of rolling mill bearing
Technical field
The invention belongs to the maintenance technique fields of equipment, specifically provide a kind of utilization laser melting and coating technique and repair milling train axis The restorative procedure of bearing.
Background technology
Core component of the rolling mill bearing as milling train, subject steel plate bite, the alignment of the impact force machine that squeezes out rolling The all varying stresses of height in the process, to meet service condition, it is desirable that the equipment has higher intensity and good plasticity and toughness. Bearing block accuracy class is high, and production method is complicated, and it influences the steady of entire milling train if going wrong in operation Operation, so being all very high to its quality requirement.
Bearing block is mounted in memorial archway, and rolling mill screwdown device and mechanism for axial adjusting are all on bearing block, therefore to milling train The required precision of bearing block is also higher, and the precision variation of bearing block influences greatly, in addition, bearing block is held the quality of rolled products Impact Hen by roll is big, and rolling cooling water runs into red bright steel billet and is atomized rapidly, entrainment of the oxidation to come off from billet surface Iron powder is sprayed around.It is influenced existing for the abrasive particles such as impact that bearing block is rolled and cooling water corrosion and oxidation dust, pole Fatigue wear is easily caused, dimension overproof makes rolling-mill housing be difficult to effectively control with roll chock gap and manages, it may appear that milling train Rack is more than management limiting value phenomenon with roll chock gap, and the impact of rack is increased when causing milling train work, is caused The abrasion of rack.Mill housing is also degrading the operating condition of mill main drive system with the increase of bearing block gap, makes main transmission Vibratory impulse is big, and slipping phenomenon easily occurs when steel ingot bites, the big motor of component of machine and milling train to main transmission All cause certain damage.Rolling mill bearing gap increases, and will also directly influence the control of plate shape, product quality is made Into very big influence.
Add for the manufacturing process of rolling mill bearing from the smelting, forging, machine of material, be heat-treated, etc. processes have clearly, Stringent quality requirement.In operation, once going wrong, consequence formula is very serious.Therefore, it is necessary to take certain mode Repair.But because shape is big, aperture is big and depth, wall thickness variation are big, precision is high and is easily deformed, and is either welded, argon The various thermal processing methods such as arc-welding, vibratory weld, all can inevitably crack, heat affected area tissue inter-variable, residual stress Cause harmful influences such as aperture deformation.So as to cause bearing block that can not use.Therefore, rolling mill bearing repair has Very important meaning.
The content of the invention
It is an object of the invention to solve the above problem existing in the prior art, after repetition test and research, provide A kind of method that laser modified cladding improves the anti-corrosion wear performance of rolling mill bearing, cladding layer realize metallurgical junction with matrix It closes, bond strength is not less than the 90% of former base material, and surface layer anti-corrosion wear ability is not less than former base material and coating, and hardness can expire The operating mode of sufficient rolling mill bearing needs, and low production cost, product cost are higher.
The technical solution that the present invention provides is:A kind of laser repair method of rolling mill bearing, the restorative procedure include Following steps:
Step 1, rolling mill bearing seating face is detected;
Step 2, to rolling mill bearing mechanical chipping;
Step 3, laser cladding of material is prepared, carries out the laser repairing of rolling mill bearing;
Step 4, detected after the mechanical processing of rolling mill bearing and reparation.
A kind of 2. laser repair method of rolling mill bearing according to claim 1, which is characterized in that the laser The weight percent of the raw material of cladding material is:Cr:10-15%, Mo:2-7%, W:8-12%, Ti:3-8%, Ni: 10- 15%, Al:1-3%, Fe surplus.
A kind of 3. laser repair method of rolling mill bearing according to claim 1, which is characterized in that the laser The weight percent of the raw material of cladding material is:Cr:12.5%, Mo:5%, W:10%, Ti:5%, Ni:13%, Al:2%, Fe surpluses.
A kind of 4. laser repair method of rolling mill bearing according to claim 1, which is characterized in that the laser Restorative procedure step 3 repairs parameter:
4000 ~ 8000W of laser power;
2 ~ 10mm of spot diameter;
30 ~ 150mm/s of hot spot translational speed;
0.5 ~ 3.5mm of lap width;
Modified cladding layer thickness is 0.1 ~ 5mm.
A kind of 5. laser repair method of rolling mill bearing according to claim 1, which is characterized in that the laser Restorative procedure step 3 repairs parameter:
4000 ~ 8000W of laser power;
3 ~ 8mm of spot diameter;
50 ~ 150mm/s of hot spot translational speed;
1 ~ 2.5mm of lap width;
Modified cladding layer thickness is 0.7 ~ 2mm.Compared with prior art, the beneficial effects of the present invention are:Cladding is efficient(With Traditional cladding method is compared and see the table below);Production cost is low;The bond strength of matrix and laser cladding layer is not less than former base material 90%;Cladding layer and its Interface Microstructure are fine and close, and crystal grain is tiny, the defects of without hole, slag inclusion, crackle;Repair layer case hardness is HV350-450 has higher anti-corrosion wear performance, at the same have good creep limit, good creep rupture strength and preferably Thermal fatigue resistance and fracture property.
Specific embodiment
Certain the steel mill's universal mill line rolling mill bearing of embodiment 1
Rolling mill bearing basic condition:
Specification:880×1200mm;Weight:1200kg/ is only;Material:S45C.
The method flow of repair
1st, detect and record rolling mill bearing wear-thickness.
2nd, the position for needing cladding is subjected to mechanical chipping, oxide layer and fatigue layer is removed clean.
3rd, laser melting coating:
A, rolling mill bearing is fixed on laser numerical control machine tool, guarantee treats that cladding plane is substantially at horizontality.
B, laser melting coating metal powder:Cr:12.5%, Mo:5%, W:10%, Ti:5%, Ni:13%, Al:More than 2%, Fe Amount;
Cladding method parameter:Power:6000-700W, sweep speed:150mm/s overlaps spacing:1.5mm, cladding layer thickness:3 Mm, spot diameter:10 mm.
4th, it is machined:
The rolling mill bearing completed to cladding is machined, and recovers full size.
5th, quality testing
Size detection, rolling mill bearing size after measurement processing obtain have wear-resisting property of the skin depth for 1mm or so Cladding layer.Dye penetrant inspection detects, and ensures that cladding layer flawless, stomata etc. are mingled with.
Rolling mill bearing on-line running after laser melting coating is repaired, service life reach the 2 times or more in former new product service life, are User creates very big economic benefit.
The foregoing is only a preferred embodiment of the present invention, is not intended to limit the invention, for the skill of this field For art personnel, the invention may be variously modified and varied.Within the spirit and principles of the invention, that is made any repaiies Change, equivalent substitution, improvement etc., should all be included in the protection scope of the present invention.

Claims (5)

1. a kind of laser repair method of rolling mill bearing, which is characterized in that the restorative procedure includes following steps:
Step 1, rolling mill bearing seating face is detected;
Step 2, to rolling mill bearing mechanical chipping;
Step 3, laser cladding of material is prepared, carries out the laser repairing of rolling mill bearing;
Step 4, detected after the mechanical processing of rolling mill bearing and reparation.
A kind of 2. laser repair method of rolling mill bearing according to claim 1, which is characterized in that the laser melting coating The weight percent of the raw material of material is:Cr:10-15%, Mo:2-7%, W:8-12%, Ti:3-8%, Ni:10-15%, Al:1-3%, Fe surplus.
A kind of 3. laser repair method of rolling mill bearing according to claim 1, which is characterized in that the laser melting coating The weight percent of the raw material of material is:Cr:12.5%, Mo:5%, W:10%, Ti:5%, Ni:13%, Al:More than 2%, Fe Amount.
A kind of 4. laser repair method of rolling mill bearing according to claim 1, which is characterized in that the laser repairing Method and step 3 repairs parameter:
4000 ~ 8000W of laser power;
2 ~ 10mm of spot diameter;
30 ~ 150mm/s of hot spot translational speed;
0.5 ~ 3.5mm of lap width;
Modified cladding layer thickness is 0.1 ~ 5mm.
A kind of 5. laser repair method of rolling mill bearing according to claim 1, which is characterized in that the laser repairing Method and step 3 repairs parameter:
4000 ~ 8000W of laser power;
3 ~ 8mm of spot diameter;
50 ~ 150mm/s of hot spot translational speed;
1 ~ 2.5mm of lap width;
Modified cladding layer thickness is 0.7 ~ 2mm.
CN201711453587.1A 2017-12-28 2017-12-28 A kind of laser repair method of rolling mill bearing Pending CN108048836A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201711453587.1A CN108048836A (en) 2017-12-28 2017-12-28 A kind of laser repair method of rolling mill bearing

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201711453587.1A CN108048836A (en) 2017-12-28 2017-12-28 A kind of laser repair method of rolling mill bearing

Publications (1)

Publication Number Publication Date
CN108048836A true CN108048836A (en) 2018-05-18

Family

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Family Applications (1)

Application Number Title Priority Date Filing Date
CN201711453587.1A Pending CN108048836A (en) 2017-12-28 2017-12-28 A kind of laser repair method of rolling mill bearing

Country Status (1)

Country Link
CN (1) CN108048836A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109468634A (en) * 2018-12-25 2019-03-15 沈阳大陆激光技术有限公司 A kind of laser melting and coating technique restores the process of milling train step pad precision
CN114918611A (en) * 2022-05-19 2022-08-19 泰尔(安徽)工业科技服务有限公司 Repairing method for bearing seat of hot rolling large-scale rolling mill

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109468634A (en) * 2018-12-25 2019-03-15 沈阳大陆激光技术有限公司 A kind of laser melting and coating technique restores the process of milling train step pad precision
CN114918611A (en) * 2022-05-19 2022-08-19 泰尔(安徽)工业科技服务有限公司 Repairing method for bearing seat of hot rolling large-scale rolling mill
CN114918611B (en) * 2022-05-19 2023-10-20 泰尔(安徽)工业科技服务有限公司 Repairing method for bearing seat of hot-rolled large-scale rolling mill

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Application publication date: 20180518