CN102453905B - Method for preparing wear-resistant alloy coating on surface of wear plate of concrete pump track - Google Patents
Method for preparing wear-resistant alloy coating on surface of wear plate of concrete pump track Download PDFInfo
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- CN102453905B CN102453905B CN201010518949.2A CN201010518949A CN102453905B CN 102453905 B CN102453905 B CN 102453905B CN 201010518949 A CN201010518949 A CN 201010518949A CN 102453905 B CN102453905 B CN 102453905B
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Abstract
The invention relates to a method for preparing a wear-resistant alloy coating on the surface of wear plate of a concrete pump track, which is characterized by comprising the following steps of: (1) pre-treating the surface of the wear plate; (2) selecting alloy powder and adjusting an automatic powder sending device; (3) adjusting light beams; (4) selecting DL-HL-T5000 type CO2 laser, wherein an operating platform is a SIMENS CNC (Computerized Numerical Control) laser processing machine; automatically sending the alloy powder into a laser weld crater by a synchronous powder sending device so as to form a uniform and compact laser cladding layer on the surface of the wear plate; and (5) carrying out flaw detection after cladding. According to the invention, the wear-resistant alloy powder is uniformly clad on the surface of the wear plate through a laser cladding method so that the uniform and compact metallurgical bonding coating is formed; and firm metallurgical bonding of a cladding layer with a base body is formed, without stripping.
Description
Technical field
The present invention relates to a kind of concrete pump truck parts surface and prepare the method for wear-resistant coating, particularly relate to a kind of method that adopts laser melting and coating technique to prepare coated with wear-resisting alloy on concrete pump truck cheater plate surface, belong to laser melting and coating technique field.
Background technology
Cheater plate is the vitals of concrete pump truck, is also a consumable accessory, and its life-span length directly affects service efficiency and the use cost of pump truck.Cheater plate is the part of S shape pumping distribution valve, be connected with concrete conveying cylinder, moving parts S pipe is under the driving of oscillating oil cylinder, by concrete from a side concrete cylinder mouth shear, torsionoscillation is to opposite side concrete cylinder mouth, cut ring is being pasted cheater plate with S pipe and is being swung, and has formed switching friction pair with cheater plate.Produce strong wear because the quick swing of cut ring makes cheater plate, also will bear the surging force producing while cutting off stone simultaneously.The concrete that working medium is made up of cement, thin coarse aggregate, water and admixture, the mechanical properties such as its hardness, toughness, wear resistance and anti-crushing strength have certain requirement, and especially hardness number, is about Rockwell hardness HRC40-50.Hence one can see that, and cheater plate is mainly worked at normal temperatures, the power that withstands shocks, shearing force and larger frictional force.The cheater plate life-span is about 30000m at present
3, far can not meet the needs of actual production.
The main failure forms of cheater plate is that wearing and tearing, the cracked piece that collapses lost efficacy.Wearing and tearing between cheater plate and cut ring belong to abrasive wear.First wearing and tearing show as cut ring and cheater plate aperture corner angle blunt, and form less arc surface wedge-shaped opening, and along with participating in the increase of Abrasive Particle Size of wearing and tearing, wearing clearance also increases thereupon, and gap can affect construction because of serious spillage during greatly to certain value.And along with the increase of pumping height, the impact shear of cheater plate can increase, wear and tear more violent, and the easy chipping piece that collapses.
Take safeguard procedures material used to set about from two aspects to cheater plate: the one, find the good alloy material of wear resisting property, the 2nd, cheater plate is carried out to surface treatment, to improve its wear resisting property.The working conditions of cheater plate requires matrix adopting to have the medium carbon alloy steel manufacture (as 35CrMo, 42CrMo, 40CrNiMo etc.) that good strength coordinates with toughness.Surface requirements has high hardness and wear resistance, conventionally adopt intermediate frequency thermal treatment or carburizing, carbonitriding to form wearing layer, but because its wear resistance is poor, the life-span is only 30000 tons of left and right.Surface overlaying method hardness is lower (HRC45-52) still, and has weld cracking tendency when built-up welding high hardness material.A kind of new method is that the cheater plate life-span is brought up to more than 50000 tons at steel matrix surface tungsten carbide button piece at present, but has cracking avalanche and the too high shortcoming of cost.
Therefore, select the suitable technique of preparing coated with wear-resisting alloy on concrete pump truck cheater plate surface, making the coated with wear-resisting alloy on concrete pump truck cheater plate surface and substrate combinating strength is high, wear resisting property is good, is the current problem urgently to be resolved hurrily in affiliated field.
Laser melting and coating technique, as a kind of advanced person's re-manufacturing technology, has obtained rapid popularization and widespread use in recent years.
Laser melting and coating technique utilizes the high feature of high energy laser beam focused energy, moment is by preset at substrate surface or automatically send the powdered alloy of putting, have specific physical, chemistry or mechanical property to melt completely with laser synchronization, base material part fusing simultaneously, form a kind of new composite shape matl, rapid solidification after laser beam flying, the fine and close coating of acquisition and matrix metallurgical binding, to reach the object of recovering geometrical dimension and surface strengthening.
At present, about utilizing, patent and the report of laser melting and coating process Preparation equipment parts coated with wear-resisting alloy are a lot: for example,
Publication number is " the preparing wear-resisting heat resistanceheat resistant compound coating technique at crystallizer surface laser quick cladding " that the Chinese invention patent application of CN 1932082 provides, its feature is to utilize superpower laser, become the good toughness bottoming transition layer of metallurgical binding by laser rapid scanning at copper plate of crystallizer surface cladding with matrix, and prepare cobalt base alloy wear-resisting and heat resistanceheat resistant excellent property by laser wide-band cladding at bottoming alloy surface.
Publication number is " preparation method of laser fusion covered nickel base nanometer WC/Co precoated layer " that the Chinese invention patent application of CN1786272 provides, 1. this preparation method comprises the following steps: to weigh shellac and dehydrated alcohol by the dehydrated alcohol of the shellac of every grammes per square metre and 10～20 grammes per square metres, then described shellac is added and in dehydrated alcohol, makes binding agent; 2. as required in the ratio of the binding agent of every gram of nickel base nanometer WC/Co powder and 0.1 milliliter～0.25 milliliter, weigh nickel base nanometer WC/Co powder and described binding agent and mix, stir and make pre-gluing; 3. above-mentioned pre-gluing is coated in to the workpiece surface for the treatment of Laser Cladding Treatment equably, makes precoated layer; 4. dry.Adopt homemade binding agent to prepare nickel base nanometer WC/Co precoated layer, and then adopt laser melting and coating process, prepared that surface is more smooth, finer and closely woven, basically eliminate crackle and hole be nickel base nanometer WC/Co compound coating of metallurgical binding with matrix.
Publication number is " laser melting and coating process of hydraulic support column cylinder, piston rod wear-resisting erosion resistance coating " that the Chinese invention patent application of CN101338427 provides, comprise following technological process: first column cylinder, piston rod surface pre-treatment: under room temperature, column cylinder barrel, piston rod surface carry out oil removing, rust cleaning, and clean up with alcohol; Then the selection of powdered alloy and the adjusting of automatic powder feeding device: select and there is good wear-resisting erosion resistance performance and the iron(-)base powder good with the metallurgical consistency of matrix, mainly contain Fe, C, Cr, Ni, Mo, Si, N, Nb, Ta, B in the composition of iron(-)base powder; The adjusting of last automatic powder feeding device: regulate automatic powder feeding device, automatic powder feeding head powdered alloy out is just in time dropped in laser molten pool, regulate powder sending quantity, make the thickness of alloy powder coating reach 0.6-1.2mm.
Publication number is " the railroad switch sliding bed surface abrasion resistance non-corrosive alloy coating laser melting and coating process " that the Chinese invention patent application of CN101338425 provides, comprise following technological process: first slide plate surface preparation, at room temperature degreasing and rust removal is carried out in slide plate surface, and clean up with alcohol; Then be the preset of powdered alloy, treating that the iron-based of cladding, Ni-based or Co-based alloy powder are preset in above-mentioned slide plate after treatment surface, and use with the floating rule of guide rail and adjust prealloyed powder, make it to be evenly distributed on slide plate surface and there is suitable thickness, to meet the requirement of coat-thickness after cladding; Be finally light cladding and hardening slide plate, select gas CO
2laser apparatus, worktable is numerically-controlled machine, carries out laser melting coating strengthening on slide plate surface.
Publication number is " the pick-like bit denticle head laser fusing and coating wear-resistant coating reinforcing process " that the Chinese invention patent application of CN101338428 provides, and comprises following technological process: be first the pre-treatment of pick denticle head surface; Then be the selection of powdered alloy and the adjustment of automatic powder feeding device; It is finally pick head laser cladding wear alloy coat.
Though the technique scheme that prior art provides can utilize laser melting and coating process to carry out wear-resistant coating processing to equipment component parts, obtains certain technique effect.But to other specific equipment unit, for example ad hoc structure as concrete pump truck cheater plate, the processing parameter that existing laser melting and coating process provides obviously can not adapt to.
Retrieve verification through the applicant: adopt laser melting and coating process to prepare coated with wear-resisting alloy on concrete pump truck cheater plate surface, the domestic precedent that there is no, does not see relevant report abroad yet.Therefore, find out suitable employing laser melting coating is prepared coated with wear-resisting alloy processing parameter on concrete pump truck cheater plate surface, still need those skilled in the art further to make creationary research work.
Summary of the invention
The object of the invention is to process difficult problem for prior art to preparing coated with wear-resisting alloy on concrete pump truck cheater plate surface, by Improvement repeatedly, provide a kind of new method of preparing coated with wear-resisting alloy on concrete pump truck cheater plate surface.The method adopts the powdered alloy with good wear resistance as cladding alloy material, take laser cladding method by the powdered alloy with wear resisting property equably cladding on cheater plate surface, form the metallurgical binding coating of even compact, cladding layer and matrix form firmly metallurgical binding, do not produce and peel off.
The technical scheme that the present invention provides is: this method of preparing coated with wear-resisting alloy on concrete pump truck cheater plate surface, is characterized in that technological process is as follows:
(1) cheater plate surface preparation
Under room temperature, oil removing, rust cleaning are carried out in cheater plate surface, and clean up with alcohol.And with Dye inspectiong, it is tested, the defect such as require surperficial flawless, pore, be mingled with;
(2) selection of powdered alloy and the adjusting of automatic powder feeding device
Select and have excellent wear energy and the iron(-)base powder good with the metallurgical consistency of matrix, the Chemical Composition of iron(-)base powder by weight percentage composition is:
C:0.05%-0.1%, Cr:13%-16%, Ni:2%-4%, Mo:1%-1.5%, Si:1%-1.2%, N:0.5%-0.8%, Nb:0.8%-1%, Ta:0.2%-0.4%, B:0.3%-0.5%, surplus is Fe.
Regulate automatic powder feeding device, automatic powder feeding head powdered alloy out is just in time dropped in laser molten pool, regulate powder sending quantity, make the thickness of alloy powder coating reach 1-1.5mm.
(3) light beam regulation
Select 10*1mm broadband integral mirror, and to regulate defocusing amount to make laser focusing hot spot being rectangle, spot size: long * is wide=(8-10) * (1-1.5) mm
(4) wear-resistant coating laser melting coating
Select DL-HL-T5000 type CO
2laser apparatus, worktable is SIMENS CNC laser processing machine.Adopt synchronous powder feeding system device that powdered alloy is sent into laser molten pool automatically, form the laser cladding layer of even compact on cheater plate surface.
Melting and coating process parameter is as follows:
Laser power P=3000～4000W
Focusing rectangle spot size: long * is wide=(8-10) * (1-1.5) mm
Scan velocity V=300-600mm/min
Overlapping rate 45～55%.
(5) flaw detection after cladding
With Dye inspectiong, tested in cheater plate surface working position, require the defects such as working position flawless, pore.
Principle of the present invention is: employing has good wear resisting property, has the good metallurgy iron(-)base powder compatible with mechanics with cheater plate matrix, in high-power laser beam irradiation workpiece surface, adopt automatic powder feeding device synchronously to send into powdered alloy to laser molten pool, in molten bath, there is rapid melting and solidify in powdered alloy, the wear-resisting cladding layer that forms even compact, cladding layer and matrix form firmly metallurgical binding.Cladding layer thickness is at 1-1.5mm, and is uniformly distributed.
Compared with prior art, the invention has the beneficial effects as follows:
1, cladding alloy coating is even, fine and close, forms firmly metallurgical binding with matrix, and coating has good wear resisting property, adopts the cheater plate of the technology of the present invention manufacture to significantly improve wear resisting property and work-ing life.
2, the present invention can be used for cheater plate manufacture and repairs and manufacture.
Embodiment
Embodiment 1 prepares coated with wear-resisting alloy on concrete pump truck cheater plate surface
The body material of concrete pump truck cheater plate is Q235A steel alloy
The chemical constitution that has a good metallurgy iron(-)base powder compatible with mechanics with cheater plate matrix by weight percentage composition is:
C:0.08%, Cr:14.5%, Ni:3.5%, Mo:1.2%, Si:1.2%, N:0.7%, Nb:0.9%, Ta:0.4%, B:0.5%, surplus are Fe.
Laser melting and coating process comprises following process:
(1) cheater plate surface preparation
Under room temperature, oil removing, rust cleaning are carried out in cheater plate surface, and clean up with alcohol.With Dye inspectiong, cheater plate working position is tested, the defect such as require working position flawless, pore, be mingled with;
(2) selection of powdered alloy and the adjusting of automatic powder feeding device
Select and there is excellent wear energy and the iron(-)base powder good with the metallurgical consistency of matrix, regulate automatic powder feeding head that powder is just in time dropped in laser molten pool, regulate powder sending quantity to make coat-thickness reach 1.0mm.
(3) light beam regulation
Select 10*1mm broadband integral mirror, and to regulate defocusing amount to make laser focusing hot spot being rectangle, spot size: long * is wide=8*1.5mm
(4) wear-resistant coating laser melting coating
Open DL-HL-T5000 type CO
2laser apparatus, worktable is SIMENS CNC laser processing machine.Adopt synchronous powder feeding system device that powdered alloy is sent into laser molten pool automatically, form the laser cladding layer of even compact on cheater plate surface.
Melting and coating process parameter is as follows:
Laser power P=4000W;
Focusing rectangle spot size: long * is wide=8*1.5mm
Scan velocity V=400mm/min;
Overlapping rate 45%.
(5) flaw detection after cladding
Cheater plate working position is tested with Dye inspectiong, the defects such as working position flawless, pore;
Embodiment 2 prepares coated with wear-resisting alloy on concrete pump truck cheater plate surface
The body material of concrete pump truck cheater plate is Q235A steel alloy
The chemical constitution that has a good metallurgy iron(-)base powder compatible with mechanics with cheater plate matrix by weight percentage composition is:
C:0.07%, Cr:15%, Ni:3%, Mo:1.5%, Si:1.1%, N:0.8%, Nb:0.8%, Ta:0.3%, B:0.3%, surplus are Fe.
Laser melting and coating process comprises following process:
(1) cheater plate surface preparation
Under room temperature, oil removing, rust cleaning are carried out in cheater plate surface, and clean up with alcohol.With Dye inspectiong, cheater plate working position is tested, the defect such as require working position flawless, pore, be mingled with;
(2) selection of powdered alloy and the adjusting of automatic powder feeding device
Select and there is excellent wear energy and the iron(-)base powder good with the metallurgical consistency of matrix, regulate automatic powder feeding head that powder is just in time dropped in laser molten pool, regulate powder sending quantity to make coat-thickness reach 1.4mm.
(3) light beam regulation
Select 10*1mm broadband integral mirror, and to regulate defocusing amount to make laser focusing hot spot being rectangle, spot size: long * is wide=10*1mm
(4) wear-resistant coating laser melting coating
Open DL-HL-T5000 type CO
2laser apparatus, worktable is SIMENS CNC laser processing machine.Adopt synchronous powder feeding system device that powdered alloy is sent into laser molten pool automatically, form the laser cladding layer of even compact on cheater plate surface.
Melting and coating process parameter is as follows:
Laser power P=4000W;
Focusing rectangle spot size: long * is wide=10*1mm
Scan velocity V=600mm/min;
Overlapping rate 45%.
(5) flaw detection after cladding
Cheater plate working position is tested with Dye inspectiong, the defects such as working position flawless, pore;
Embodiment 3 prepares coated with wear-resisting alloy on concrete pump truck cheater plate surface
The body material of concrete pump truck cheater plate is Q235A steel alloy
The chemical constitution that has a good metallurgy iron(-)base powder compatible with mechanics with cheater plate matrix by weight percentage composition is:
C:0.06%, Cr:15.5%, Ni:2%, Mo:1%, Si:1%, N:0.6%, Nb:1%, Ta:0.2%, B:0.4%, surplus are Fe.
Laser melting and coating process comprises following process:
(1) cheater plate surface preparation
Under room temperature, oil removing, rust cleaning are carried out in cheater plate surface, and clean up with alcohol.With Dye inspectiong, cheater plate working position is tested, the defect such as require working position flawless, pore, be mingled with;
(2) selection of powdered alloy and the adjusting of automatic powder feeding device
Select and there is excellent wear energy and the iron(-)base powder good with the metallurgical consistency of matrix, regulate automatic powder feeding head that powder is just in time dropped in laser molten pool, regulate powder sending quantity to make coat-thickness reach 1.5mm.
(3) light beam regulation
Select 10*1mm broadband integral mirror, and to regulate defocusing amount to make laser focusing hot spot being rectangle, spot size: long * is wide=9*1mm
(4) wear-resistant coating laser melting coating
Open DL-HL-T5000 type CO
2laser apparatus, worktable is SIMENS CNC laser processing machine.Adopt synchronous powder feeding system device that powdered alloy is sent into laser molten pool automatically, form the laser cladding layer of even compact on cheater plate surface.
Melting and coating process parameter is as follows:
Laser power P=4000W;
Focusing rectangle spot size: long * is wide=9*1mm
Scan velocity V=500mm/min;
Overlapping rate 45%.
(5) flaw detection after cladding
Cheater plate working position is tested with Dye inspectiong, the defects such as working position flawless, pore.
Claims (1)
1. a method of preparing coated with wear-resisting alloy on concrete pump truck cheater plate surface, its technological process is as follows:
(1) cheater plate surface preparation
Under room temperature, oil removing, rust cleaning are carried out in cheater plate surface, and clean up with alcohol, with Dye inspectiong, it is tested, require cheater plate surface flawless, pore, inclusion defect;
(2) selection of powdered alloy and the adjusting of automatic powder feeding device
Select and there is excellent wear energy and the iron(-)base powder good with the metallurgical consistency of matrix,
Regulate automatic powder feeding device, automatic powder feeding head powdered alloy out is just in time dropped in laser molten pool, regulate powder sending quantity, make the thickness of alloy powder coating reach 1-1.5mm;
(3) light beam regulation
Select 10*1mm broadband integral mirror, and to regulate defocusing amount to make laser focusing hot spot being rectangle, spot size: long * is wide=(8-10) * (1-1.5) mm;
(4) wear-resistant coating laser melting coating
Select DL-HL-T5000 type CO
2laser apparatus, worktable is SIMENS CNC laser processing machine, adopts synchronous powder feeding system device that powdered alloy is sent into laser molten pool automatically, forms the laser cladding layer of even compact on cheater plate surface, melting and coating process parameter is as follows:
Laser power P=3000～4000W, scan velocity V=300-600mm/min,
Focusing rectangle spot size: long * is wide=(8-10) * (1-1.5) mm,
Overlapping rate 45～55%;
(5) flaw detection after cladding
With Dye inspectiong, tested in cheater plate surface working position, require working position flawless, gas hole defect; The Chemical Composition that it is characterized in that iron(-)base powder by weight percentage composition is:
C:0.06%, Cr:15.5%, Ni:2%, Mo:1%, Si:1%, N:0.6%, Nb:1%, Ta:0.2%, B:0.4%, surplus are Fe.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201010518949.2A CN102453905B (en) | 2010-10-26 | 2010-10-26 | Method for preparing wear-resistant alloy coating on surface of wear plate of concrete pump track |
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| CN201010518949.2A CN102453905B (en) | 2010-10-26 | 2010-10-26 | Method for preparing wear-resistant alloy coating on surface of wear plate of concrete pump track |
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| CN102453905B true CN102453905B (en) | 2014-11-26 |
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Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN103233221A (en) * | 2013-04-17 | 2013-08-07 | 武汉点金激光科技有限公司 | Concrete pump vehicle wear plate surface ceramic powder clad layer and laser cladding method thereof |
| CN103469198A (en) * | 2013-06-05 | 2013-12-25 | 武汉团结点金激光科技有限公司 | Laser remanufacturing and restoring technology of automobile transmission gear hot-forging die |
| CN108705494B (en) * | 2018-04-11 | 2022-04-08 | 安徽铜陵科力阀门有限责任公司 | Self-control type gate valve special machining tool |
| CN109483170B (en) * | 2018-12-04 | 2022-08-05 | 烟台盛腾泵车管件有限公司 | Manufacturing method of glasses plate and cutting ring of concrete conveying pump truck |
| CN113151824B (en) * | 2021-04-25 | 2022-03-25 | 中国海洋大学 | Cellular and columnar combined structure coating used in marine environment and preparation method thereof |
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|---|---|---|---|---|
| CN101122018A (en) * | 2007-09-29 | 2008-02-13 | 山东大学 | Special-purpose iron-base powder for laser fast forming |
| CN101338427A (en) * | 2008-08-07 | 2009-01-07 | 沈阳大陆激光成套设备有限公司 | Laser fusing and coating process for wear resistant and etch-resistant coating of hydraulic support column cylinder and piston rod |
| CN101596551A (en) * | 2009-07-03 | 2009-12-09 | 北京工业大学 | A kind of pairing gold plating seamless steel tube top and preparation method |
| CN101709469A (en) * | 2009-12-10 | 2010-05-19 | 中国人民解放军装甲兵工程学院 | Iron-based alloy powder material for plasma cladding quick forming |
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2010
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Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101122018A (en) * | 2007-09-29 | 2008-02-13 | 山东大学 | Special-purpose iron-base powder for laser fast forming |
| CN101338427A (en) * | 2008-08-07 | 2009-01-07 | 沈阳大陆激光成套设备有限公司 | Laser fusing and coating process for wear resistant and etch-resistant coating of hydraulic support column cylinder and piston rod |
| CN101596551A (en) * | 2009-07-03 | 2009-12-09 | 北京工业大学 | A kind of pairing gold plating seamless steel tube top and preparation method |
| CN101709469A (en) * | 2009-12-10 | 2010-05-19 | 中国人民解放军装甲兵工程学院 | Iron-based alloy powder material for plasma cladding quick forming |
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Effective date of registration: 20161202 Address after: 610202 Sichuan city of Chengdu Province Southwest Airport Economic Development Zone Shuangliu District Patentee after: Sichuan Dacheng Turbine Equipment Remanufacturing Technology Co., Ltd. Address before: 110136 Shenyang, Shenbei New Area Province Economic Development Zone, justice, Shen North Road, No. 29, No. Patentee before: Shenyang Dalu Laser System Co., Ltd. |