CN106480449A - A kind of method that laser manufactures heavy section universal mill horizontal roller - Google Patents
A kind of method that laser manufactures heavy section universal mill horizontal roller Download PDFInfo
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- CN106480449A CN106480449A CN201510552336.3A CN201510552336A CN106480449A CN 106480449 A CN106480449 A CN 106480449A CN 201510552336 A CN201510552336 A CN 201510552336A CN 106480449 A CN106480449 A CN 106480449A
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Abstract
A kind of method that laser manufactures heavy section universal mill horizontal roller, including：Become to reserve the heavy section universal mill horizontal roller matrix of certain laser melting coating size using the good graphitic steel of obdurability or Nodular cast iron material turnery processing, and at room temperature heavy section universal mill horizontal roller matrix carried out with oil removing to derust process；From having good wear etch resistant properties and the Co-based alloy powder good with the matrix metallurgy compatibility, adjust automatic powder feeding device, so that automatic powder feeding head alloy powder out is just fallen in laser molten pool；Alloy powder is automatically fed into by laser molten pool using synchronous powder feeding system device, high power focused laser beam and automatic powder feeding head feed vertically, heavy section universal mill horizontal roller is pressed setting speed and rotated, and forms the laser cladding layer of even compact in horizontal roller outer surface；Subsequent heat treatment, after laser wide-band cladding nickel-base alloy will slow cooling at a slow speed, horizontal body of roll heat-preservation cotton is fully wrapped up, and carries out stress relief annealing at room temperature.
Description
Technical field
The present invention relates to a kind of process manufacturing metallurgy parts, the method that more particularly to a kind of laser manufactures heavy section universal mill horizontal roller.
Background technology
Heavy section universal mill horizontal roller is one of vital equipment during Rolling Production, and can its life-span length directly influence rolling and keep direct motion, obtain high yield and reduces cost.Heavy section universal mill horizontal roller is composite construction, and it is to be assembled together using the method for hot charging by collars, roll shaft, and such roll shaft is reusable.Collars typically adopts composite, and outer layer selects the high-carbon half steel of high-wearing feature, rich chromium cast iron alternatively even with materials such as high-speed steel, produces the working lining thickness it is ensured that enough high-wearing feature using centrifugal casting technique；Core can be using graphitic steel, the Nodular cast iron material with certain obdurability.The horizontal collars of domestic universal mill typically adopts high-carbon half steel material composite at present.The working environment of universal mill horizontal roller is very severe, and the fretting wear of steel billet, heat exhaustion and the heat erosion that are directly subject to red heat under high temperature are thus lead to losing efficacy of horizontal roller.Horizontal roller lost efficacy to be made production work and causes damage greatly outer except meeting, returns actual production and operates and brings a lot of difficulties.
The process of the general centrifugal casting adopting of China at present manufactures heavy section universal mill horizontal roller, although this kind of method can meet the working lining thickness of heavy section universal mill horizontal roller, but its Free Surface of the product that centrifugal casting is produced is coarse, scale error is big, of poor quality, there is more pore, slag inclusion is it is therefore desirable to increase allowance, and is not suitable for pouring into a mould the easy alloy producing gravity segregation.
Therefore, select suitable method it is ensured that the mismachining tolerance of heavy section universal mill horizontal roller is little, thermal deformation is little, standardization is strong, the performance after manufacture is good, be problem currently urgently to be resolved hurrily.
Content of the invention
It is an object of the invention to solving the problems referred to above that prior art exists, by Improvement repeatedly, giving one kind and utilizing high power CO2The method that heavy section universal mill horizontal roller is prepared in the quick melting welding of laser instrument.Laser melting coating recovery technique utilizes the high feature of high energy laser beam focused energy, moment by substrate surface preset or with laser synchronization automatically send putting, there is specific physical, chemistry or the alloy powder of mechanical property be completely melt, base material part fusing simultaneously, form a kind of new compound material, rapid solidification after laser beam flying, obtain the fine and close coating with matrix metallurgical binding, thus reaching surface peening, the purpose of raising service life.The present invention is using having the alloy powder of good corrosion resistance and wearability as cladding alloy material, take laser cladding method by have the alloy powder of wear-resisting erosion resistance performance equably cladding on the working surface of heavy section universal mill horizontal roller, form the metallurgical binding coating of even compact, corrosion resistance and wearability all greatly improve.
The technical scheme that the present invention is given is.
A kind of method that laser manufactures heavy section universal mill horizontal roller, its feature comprises the following steps that.
1. the processing of heavy section universal mill horizontal roller matrix and surface preparation.
Become to reserve the heavy section universal mill horizontal roller matrix of certain laser melting coating size using the good graphitic steel of obdurability or Nodular cast iron material turnery processing, and adopt the H of 200 ~ 300g/l at room temperature2SO4With the mixed liquor of the HCl of 100 ~ 120g/l, heavy section universal mill horizontal roller matrix is carried out with oil removing to derust process.
2. the regulation of the selection of alloy powder and automatic powder feeding device.
From have good wear etch resistant properties and with the matrix metallurgy good Co-based alloy powder of the compatibility.
Adjust automatic powder feeding device, so that automatic powder feeding head alloy powder out is just fallen in laser molten pool, adjust powder sending quantity, make the thickness of alloy powder coating reach 0.8 1.2mm.
Above-mentioned regulation automatic powder feeding device again disclosed in first patent application document, Application No.：200720013899.6, patent name is《Machine for transporting powder with multiple-storage hopper》.
3. wear-resisting erosion resistance coated laser cladding.
From DL-HL-T10000 type CO2Laser instrument.Workbench is SIEMENS Digit Control Machine Tool.Alloy powder is automatically fed into by laser molten pool using synchronous powder feeding system device, high power focused laser beam and automatic powder feeding head feed vertically, heavy section universal mill horizontal roller is pressed setting speed and rotated, and forms the laser cladding layer of even compact in horizontal roller outer surface.Specific process parameter is as follows：
Focus lamp f=300
Cladding power P=4000W
Spot diameter D=3.5mm
Scan velocity V=2.5m/min
Overlapping rate 50%
Coating layer thickness：0.8-1.2mm.
4. subsequent heat treatment.
After laser wide-band cladding nickel-base alloy will slow cooling at a slow speed, horizontal body of roll heat-preservation cotton is fully wrapped up, and carries out 24 hours of stress relief annealing at room temperature.
The laser type of the present invention is CO2Gas laser, its peak power is 10000W, 10.6 microns of wavelength, and the quick scanning of achievable narrowband low order mould and broadband rectangular scanning carry out cladding.
The principle of the present invention is：Using the Co-based alloy powder with excellent wear-resisting erosion resistance performance, it is not only due to the excellent toughness of Co-based alloy powder tool itself and preferable wearability, it is also due to self-fusible alloy powder of nickel-base and the similar thermal expansion coefficient of heavy section universal mill horizontal roller base material simultaneously, i.e. this Co-based alloy powder is preferable with the metallurgical binding of heavy section universal mill horizontal roller base material and mechanical compatibility, such that it is able to suppress in laser cladding process because the difference between base material and the hot physical property of cladding material leads to the structural stress of generation.In laser cladding process, while with high-power laser beam irradiation level roller surface, send into alloy powder using automatic powder feeding device is synchronous to laser molten pool, there is rapid melting and solidification in alloy powder in molten bath, form the wear-resisting erosion resistance cladding layer of even compact, cladding layer and matrix form firm metallurgical binding.In the range of HRC45-55, cladding layer thickness is uniformly distributed cladding layer hardness in 0.8-1.2mm, hardness, thickness.
The present invention has advantages below and feature.
1st, cladding alloy and matrix form the common working lining that the specific function coating of metallurgical binding formed compared with conventional centrifugal casting and have more uniform, fine and close, have more excellent wear-resisting erosion resistance performance, improve service life.
2nd, the selection of core material and working layer that laser manufactures heavy section universal mill horizontal roller reduces cost compared with conventional centrifugal casting method.
2nd, laser melting and coating technique does not have pollution problem to environment, and centrifugal casting has polluting environment, and laser melting and coating technique has significant environment-friendly advantage.
3rd, the present invention can be used for the manufacture of heavy section universal mill horizontal roller and reparation remanufactures.
Specific embodiment
Embodiment.
A kind of method that laser manufactures heavy section universal mill horizontal roller, including following technical process.
（1）The processing of heavy section universal mill horizontal roller matrix and surface preparation.
Become to reserve the heavy section universal mill horizontal roller matrix of certain laser melting coating size using the good graphitic steel of obdurability or Nodular cast iron material turnery processing, under room temperature, to universal mill, horizontal roller surface carries out degreasing and rust removal, and clean with alcohol washes.
（2）The selection of alloy powder and the regulation of automatic powder feeding device.
The present invention selects the Co-based alloy powder that alloy powder is particular formulation, and the chemical analysis peace percentage by weight of this Co-based alloy powder is：Cr：23%； Mo：14%；W：5%；Fe：7%；Co：3%；V：0.2%；Mn：0.8%；Si：0.5%；Y2O3：0.3%；La2O3：0.3%；Ce：0.3%；Balance of Ni.
The preparation method of Ni alloy powder.
By W metal, Cr, Mo, W, Co, V, Fe, Si, Mn and rare earth element y2O3、La2O3, Ce press after above-mentioned percentage by weight proportioning extracts, put in intermediate frequency furnace, it is heated to 1,450 1550 DEG C under an argon atmosphere, powder is made to melt completely and mix homogeneously, the molten metal stream of melting is injected the bottom pour ladle crucible of water atomization equipment, it is equipped with water atomizing nozzle in the lower section of bottom pour ladle crucible, when the molten metal stream of melting flows through nozzle by flow-guiding mouth, the high-velocity flow being projected by nozzle smashes into droplet, subsequent aluminium alloy is dropped in water and is frozen into powder.
Adjusting automatic powder feeding head makes powder just fall in laser molten pool, and adjusting powder sending quantity makes coating layer thickness reach 1.5mm.
（3）Laser melting coating manufactures heavy section universal mill horizontal roller.
From DL-HL-T5000 type CO2Laser instrument, workbench is SIEMENS Digit Control Machine Tool, carries out laser melting coating manufacture in the horizontal roller surface of heavy section universal mill.
Concrete melting and coating process parameter is as follows.
Cladding power P=4000W.
Spot diameter D=3.5mm.
Scan velocity V=2.5m/min.
Overlapping rate 50%.
Claims (2)
1. a kind of laser manufactures the method for heavy section universal mill horizontal roller it is characterised in that comprising the following steps that：
(1) processing of heavy section universal mill horizontal roller matrix and surface preparation
Become to reserve the heavy section universal mill horizontal roller matrix of certain laser melting coating size using the good graphitic steel of obdurability or Nodular cast iron material turnery processing, and adopt the H of 200 ~ 300g/l at room temperature2SO4With the mixed liquor of the HCl of 100 ~ 120g/l, heavy section universal mill horizontal roller matrix is carried out with oil removing to derust process；
(2) regulation of the selection of alloy powder and automatic powder feeding device
From have good wear etch resistant properties and with the matrix metallurgy good Co-based alloy powder of the compatibility, adjust automatic powder feeding device, so that automatic powder feeding head alloy powder out is just fallen in laser molten pool, adjust powder sending quantity, make the thickness of alloy powder coating reach 0.8 1.2mm；
(3) wear-resisting erosion resistance coated laser cladding
From DL-HL-T10000 type CO2Laser instrument, workbench is SIEMENS Digit Control Machine Tool, alloy powder is automatically fed into by laser molten pool using synchronous powder feeding system device, high power focused laser beam and automatic powder feeding head feed vertically, heavy section universal mill horizontal roller is pressed setting speed and is rotated, form the laser cladding layer of even compact in horizontal roller outer surface, specific process parameter is as follows：
Focus lamp f=300
Cladding power P=4000W
Spot diameter D=3.5mm
Scan velocity V=2.5m/min
Overlapping rate 50%
Coating layer thickness：0.8-1.2mm；
(4) subsequent heat treatment
After laser wide-band cladding nickel-base alloy will slow cooling at a slow speed, horizontal body of roll heat-preservation cotton is fully wrapped up, and carries out 24 hours of stress relief annealing at room temperature.
2. laser according to claim 1 manufactures the method for heavy section universal mill horizontal roller it is characterised in that the chemical analysis of this Co-based alloy powder are by weight percentage：
Cr：23%, Mo：14%, W：5%, Fe：7%, Co：3%, V：0.2%, Mn：0.8%, Si：0.5%, Y2O3：0.3%, La2O3：0.3%, Ce：0.3%, balance of Ni.
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN107435118A (en) * | 2017-08-02 | 2017-12-05 | 马鞍山市万鑫铸造有限公司 | A kind of method that spheroidal graphite cast-iron and its Cast Iron Surface laser melting coating produce coating |
| CN110241415A (en) * | 2019-06-26 | 2019-09-17 | 王辉 | Rock wool at fine supercentrifuge roller head production method |
| CN111375764A (en) * | 2018-12-31 | 2020-07-07 | 罗伯特·博世有限公司 | Simulation of weld pool characteristics for selective laser melting additive manufacturing |
| CN113477710A (en) * | 2021-07-15 | 2021-10-08 | 中冶赛迪工程技术股份有限公司 | Connecting method and device for hot-rolled strip steel endless rolling intermediate billet |
| CN117626273A (en) * | 2023-12-25 | 2024-03-01 | 河北京东管业有限公司 | Surface treatment process of spheroidal graphite cast iron pipe |
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| CN110241415A (en) * | 2019-06-26 | 2019-09-17 | 王辉 | Rock wool at fine supercentrifuge roller head production method |
| CN110241415B (en) * | 2019-06-26 | 2021-03-12 | 王辉 | Method for manufacturing roller head of rock wool fiber forming high-speed centrifugal machine |
| CN113477710A (en) * | 2021-07-15 | 2021-10-08 | 中冶赛迪工程技术股份有限公司 | Connecting method and device for hot-rolled strip steel endless rolling intermediate billet |
| CN117626273A (en) * | 2023-12-25 | 2024-03-01 | 河北京东管业有限公司 | Surface treatment process of spheroidal graphite cast iron pipe |
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Application publication date: 20170308 |
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