CN107190257A - A kind of laser melting coating of mould damage location and mechanic shot peening interlock reproducing method - Google Patents
A kind of laser melting coating of mould damage location and mechanic shot peening interlock reproducing method Download PDFInfo
- Publication number
- CN107190257A CN107190257A CN201710328831.5A CN201710328831A CN107190257A CN 107190257 A CN107190257 A CN 107190257A CN 201710328831 A CN201710328831 A CN 201710328831A CN 107190257 A CN107190257 A CN 107190257A
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- CN
- China
- Prior art keywords
- shot peening
- cladding layer
- melting coating
- laser
- mechanic shot
- 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.)
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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
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D7/00—Modifying the physical properties of iron or steel by deformation
- C21D7/02—Modifying the physical properties of iron or steel by deformation by cold working
- C21D7/04—Modifying the physical properties of iron or steel by deformation by cold working of the surface
- C21D7/06—Modifying the physical properties of iron or steel by deformation by cold working of the surface by shot-peening or the like
Abstract
Interlock reproducing method the invention discloses a kind of laser melting coating of mould damage location and mechanic shot peening, belong to field of laser processing.This method is according to the crackle of impaired mould or region and the depth of damage, to after its rejected region milling to certain depth and carrying out mechanic shot peening pretreatment, then the laser melting coating of given cladding layer thickness is carried out from groove milling bottom, then mechanic shot peening is carried out in clad layer surface.So successively carry out laser melting coating and interlocking for mechanic shot peening remanufactures, until clad layer surface is higher by original die surface, finally again recovered in injury repair region to original size using Milling Process.The present invention carries out successively combined treatment using mechanic shot peening to laser cladding layer, every layer of cladding layer is set all to produce plastic deformation, effectively reduce internal defects, and the performance of each cladding layer is got a promotion, therefore make reparation area in the depth direction structure and performance evenly, so as to realize that the high-effect high-quality of impaired mould is remanufactured.
Description
Technical field
The invention belongs to field of laser processing, and in particular to a kind of laser melting coating of mould damage location is handed over mechanic shot peening
Wrong reproducing method, the surface for being particularly suitable for use in car transmissions extrusion die remanufactures reparation.
Background technology
Laser melting coating is a kind of new surface modifications technology, by adding cladding material on centralized procurement surface, and utilizes high energy
The method that laser beam is allowed to the consolidation together with substrate surface thin layer, in substrate surface formation and the filling cladding of its metallurgical binding
Layer, significantly improves wear-resisting, anti-corrosion, anti-oxidant and electrical characteristic the process of substrate surface, so as to reach that surface is modified
Or the purpose repaired.
Mechanic shot peening is to improve metal material anti-fatigue ability extremely efficient method.Bullet hits metal surface shape repeatedly
Into plastic deformation layer, mantle micro structure, crystal grain thinning can be homogenized, the microstructural defects such as part micro-crack, stomata are eliminated,
And residual stress is induced to prevent the stress corrosion of metal inside.
Automobile die industry increases quick always, and its huge development potentiality brings more wide for automobile die industry
Development space.Automobile die under arms during acted on by the power of size and direction complexity, and colded and heat succeed each other
The influence of change, condition of work is complicated, inevitably weares and teares, fatigue, crackle, or even the failure mode such as fracture,
Particularly some gate-in mold systems are scrapped because of local damage, it is necessary to remanufacture mould, have not only added cost but also have lost time,
Therefore, the re-manufacturing technology of mould is particularly important.The sufacing commonly used at present in mould repair has Bead weld repair skill
Art, hot spray-welding recovery technique, Brush Plating recovery technique, electric spark recovery technique and laser melting coating recovery technique etc..Wherein use
Laser melting and coating technique repairing mould, can make the mould after reparation have relatively excellent case hardness, wearability, cold-and-heat resistent fatigue
Etc. performance.
Although laser melting coating has its advantage, but still there are problems that residual tension and metallurgical imperfection the two..But grind
Study carefully and show, mechanic shot peening can effectively eliminate its tension in laser cladding layer induction certain depth residual compressive stress layer, and
And crystal grain thinning eliminates partial metallurgical defect.Therefore, in the laser cladding process for mould damage location, machinery is introduced
Shot-peening can effectively improve remanufacture efficient and high-quality, and can even complete to exceed the high-performance of former substrate performance and repair
It is multiple.
The content of the invention
To solve the above problems, interlocking again the invention provides a kind of laser melting coating of mould damage location and mechanic shot peening
Manufacture method, it is characterised in that：This method is according to the crackle of impaired mould or region and the depth of damage, to its rejected region milling
Cut to certain depth and carry out mechanic shot peening pretreatment, the laser for then carrying out given cladding layer thickness from groove milling bottom melts
Cover, then carry out mechanic shot peening in clad layer surface.So successively carry out laser melting coating and interlocking for mechanic shot peening remanufactures, directly
Original die surface is higher by clad layer surface, is finally again recovered in injury repair region to original size using Milling Process.
The present invention carries out successively combined treatment using mechanic shot peening to laser cladding layer, every layer of cladding layer is all produced plastic deformation, has
Effect reduces internal defects, and the performance of each cladding layer is got a promotion, therefore makes reparation area structure and property in the depth direction
Can evenly, so as to realize that the high-effect high-quality of impaired mould is remanufactured.
It is concretely comprised the following steps：
(1) repairing mould face crack needed for being determined using ultrasound measuring instrument or the region S and depth capacity H of abrasion；
(2) the influence depth h ' that can be reached according to the specific process parameter of mechanic shot peening, so that it is determined that single laser is molten
The thickness h of coating, wherein h ' -0.1mm≤h<h’；
(3) the defect maximum region according to determined by step (1), the Milling Process that depth is H+m is carried out to the region.Its
Middle 0.5mm≤m≤0.8mm；
(4) mechanic shot peening pretreatment is carried out to milling bottom surface；
(5) cladding layer sum N is determined according to milling depth H+m and single laser cladding layer thickness h.WhereinN is integer；
(6) first layer laser melting coating is carried out from milling bottom surface, the preset one layer of cladding powder of substrate surface after milling makes
Laser melting coating is carried out to it with optical fiber laser, it is h to make its thickness, is considered as cladding layer 1；Laser cladding technological parameter scope is such as
Under：Laser power 400-1800W, sweep speed 4-9mm/s, spot diameter 1-3mm, overlapping rate 30-50%, protection gas Ar 3-
5L/min；
(7) after after the coagulation forming of cladding layer 1, mechanic shot peening is carried out on the surface of cladding layer 1；Mechanic shot peening technological parameter is such as
Under：Using gas blowout machine and cast steel ball S110 material sprays, by HB/Z-1992 aircraft industry standard to cladding layer bead, material spray is straight
Footpath 0.25mm, shot peening strength 0.6A, shot-peening coverage rate 100%；
(8) so repeat step (6) and (7), until laser cladding layer is fully filled with groove milling and is higher by original die surface,
So as to complete the mechanic shot peening of i.e. last layer laser cladding layer of n-th layer, rear mold will be remanufactured using Milling Process method afterwards
Damage field recover to original size, its flatness be less than or equal to 0.02mm.
Beneficial effect of the present invention：The present invention carries out successively combined treatment using mechanic shot peening to laser cladding layer, makes every layer
Cladding layer all produces plastic deformation, effectively reduces internal defects, and the performance of each cladding layer is got a promotion, therefore makes reparation
Area in the depth direction structure and performance evenly, so as to realize that the high-effect high-quality of impaired mould is remanufactured.
Brief description of the drawings
Fig. 1 is that laser melting coating of the present invention and mechanic shot peening interlock reproducing method schematic diagram.
Fig. 2 is that laser melting coating of the present invention and mechanic shot peening interlock the operating procedure flow chart that reproducing method shows.
Fig. 3 is the SEM surface microscopic topographics after Cr12 mould steel friction and wear tests after quenching.
Fig. 4 is to interlock to remanufacture rear mold steel fretting wear with mechanic shot peening according to step described herein progress laser melting coating
SEM surface microscopic topographics after test.
Fig. 5 is according to section metallographic structure figure along along depth direction after step of the present invention progress repair process.
Embodiment
The embodiment to the present invention is described in detail with reference to the accompanying drawings and examples, but the present invention should not be only
It is limited to embodiment.
The cladding powder that the present embodiment is used is Fe901, and matrix of samples material is Cr12 mould steel.Matrix sample is
Car transmissions extrusion die to be repaired, its physical dimension is φ 65mm × 180mm.
A kind of above-mentioned processing method of use repairs the implementation of sample, and its step is：
(1) crackle and damage field area on repairing mould surface needed for being determined using ultrasound measuring instrument are 1mm2, it is maximum
Depth H is 2mm；
(2) influence depth according to the concrete technology of mechanic shot peening in cladding layer is 0.4mm, so that it is determined that single laser
The thickness h of cladding layer is 0.3mm；
(3) the defect maximum region of the determination in step (1), wherein 0.5mm≤m≤0.8mm, take m=0.5mm,
Depth capacity H is 2mm again, therefore the Milling Process that depth is 2.5mm is carried out to the region；
(4) mechanic shot peening pretreatment is carried out to milling bottom surface；
(5) according to milling depth and laser cladding layer thickness, the total calculation formula of cladding layer is passed throughIt is 9 layers to determine N；
(6) first layer laser melting coating is carried out from milling bottom surface, the preset one layer of cladding powder of substrate surface after milling makes
Laser melting coating is carried out to it with optical fiber laser, it is 0.3mm to make its thickness, is considered as cladding layer 1；Laser cladding technological parameter scope
It is as follows：Laser power 400-1800W, sweep speed 4-9mm/s, spot diameter 1-3mm, overlapping rate 30-50%, protection gas Ar
3-5L/min；
(7) after after the coagulation forming of cladding layer 1, mechanic shot peening is carried out on the surface of cladding layer 1；Mechanic shot peening technological parameter is such as
Under：Using gas blowout machine and cast steel ball S110 material sprays, by HB/Z-1992 aircraft industry standard to cladding layer bead, material spray is straight
Footpath 0.25mm, shot peening strength 0.6A, shot-peening coverage rate 100%；
(8) so repeat step (6) and (7), until laser cladding layer is fully filled with groove milling and is higher by original die surface,
So as to complete the mechanic shot peening of i.e. last layer laser cladding layer of n-th layer, rear mold will be remanufactured using Milling Process method afterwards
Damage field recover to original size, its flatness be less than or equal to 0.02mm.
Wire cutting sampling is carried out to the mould after the completion of reparation, area is repaired to it first and does wearability test, by it and base
Material wearability is contrasted, then takes its section to do metallographic structure observation, by it with only with Multilayer Laser Cladding restorative procedure institute
The microstructure of surface cladding layer obtained is contrasted.
As shown in figure 4, when use laser melting coating and mechanic shot peening interlock reproducing method reparation damage component, gained cladding
Layer surface is lighter compared to Fig. 3 substrate surface polishing scratch, only a small amount of to peel off, and illustrates that its whole cladding layer hardness is higher and very equal
Even, block resistance more preferably, and without obvious hard particles, can illustrate by the present invention to damaging the reproducing method of grinding tool compared with original
Mould has better surface characteristic.
Fig. 5 be according to step of the present invention carry out repair process after section metallographic structure figure along along depth direction, such as
Shown in Fig. 5, its section crystal grain is compared with the section crystal grain after the processing of general Multilayer Laser Cladding, and its size is much smaller, and
Particle size distribution is more uniform from depth direction, so that it can preferably be merged with matrix, its mechanicalness
Can be also more excellent, illustrate the section that there is more high-quality to the reproducing method for damaging grinding tool compared with distinct methods by the present invention
Characteristic.
Claims (8)
- The reproducing method 1. a kind of laser melting coating of mould damage location and mechanic shot peening interlock, it is characterised in that：According to impaired The crackle of mould or the region of damage and depth, to after its rejected region milling to certain depth and carrying out mechanic shot peening and locating in advance Reason, the laser melting coating of given cladding layer thickness is then carried out from groove milling bottom, then mechanic shot peening is carried out in clad layer surface, such as This successively carries out laser melting coating and interlocking for mechanic shot peening remanufactures, until clad layer surface is higher by original die surface, finally Injury repair region is recovered to original size using Milling Process again；Successively group is carried out to laser cladding layer using mechanic shot peening Conjunction is handled, and every layer of cladding layer is all produced plastic deformation, is effectively reduced internal defects, and put forward the performance of each cladding layer Rise, thus make reparation area in the depth direction structure and performance evenly, so as to realize that the high-effect high-quality of impaired mould is made again Make.
- The reproducing method 2. a kind of laser melting coating of mould damage location as claimed in claim 1 and mechanic shot peening interlock, its It is characterised by, comprises the following steps that：(1) repairing mould surface+crackle needed for being determined using ultrasound measuring instrument or the region S and depth capacity H of damage；(2) the influence depth h ' that can be reached according to the specific process parameter of mechanic shot peening, so that it is determined that single laser cladding layer Thickness h；(3) the defect maximum region according to determined by step (1), the Milling Process that depth is H+m is carried out to the region；(4) mechanic shot peening pretreatment is carried out to milling bottom surface；(5) cladding layer sum N is determined according to milling depth H+m and single laser cladding layer thickness h；(6) first layer laser melting coating is carried out from milling bottom surface, the preset one layer of cladding powder of substrate surface after milling uses light Fibre laser carries out laser melting coating to it, and it is h to make its thickness, is considered as cladding layer 1；(7) after after the coagulation forming of cladding layer 1, mechanic shot peening is carried out on the surface of cladding layer 1；(8) so repeat step (6) and (7), until laser cladding layer is fully filled with groove milling and is higher by original die surface, so that The mechanic shot peening that n-th layer is last layer of laser cladding layer is completed, the damage of rear mold will be remanufactured using Milling Process method afterwards Hinder region to recover to original size, its flatness is less than or equal to A mm.
- The reproducing method 3. a kind of laser melting coating of mould damage location as claimed in claim 2 and mechanic shot peening interlock, its It is characterised by, in step (2), h ' -0.1mm≤h<h’.
- The reproducing method 4. a kind of laser melting coating of mould damage location as claimed in claim 2 and mechanic shot peening interlock, its It is characterised by：In step (3), 0.5mm≤m≤0.8mm.
- The reproducing method 5. a kind of laser melting coating of mould damage location as claimed in claim 2 and mechanic shot peening interlock, its It is characterised by：In step (5),N is integer.
- The reproducing method 6. a kind of laser melting coating of mould damage location as claimed in claim 1 and mechanic shot peening interlock, It is characterized in that：In step (8), die surface flatness A≤0.02mm after milling resizing.
- The side of remanufacturing 7. a kind of laser melting coating of mould damage location as described in claims 1 or 2 and mechanic shot peening interlock Method, it is characterised in that：Laser cladding technological parameter scope is as follows：Laser power 400-1800W, sweep speed 4-9mm/s, hot spot Diameter 1-3mm, overlapping rate 30-50%, protection gas Ar 3-5L/min.
- The side of remanufacturing 8. a kind of laser melting coating of mould damage location as described in claims 1 or 2 and mechanic shot peening interlock Method, it is characterised in that：Mechanic shot peening technological parameter is as follows：Using gas blowout machine and cast steel ball S110 material sprays, by HB/Z-1992 aviations Industrial standard is to cladding layer bead, material spray diameter 0.25mm, shot peening strength 0.6A, shot-peening coverage rate 100%.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710328831.5A CN107190257A (en) | 2017-05-11 | 2017-05-11 | A kind of laser melting coating of mould damage location and mechanic shot peening interlock reproducing method |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710328831.5A CN107190257A (en) | 2017-05-11 | 2017-05-11 | A kind of laser melting coating of mould damage location and mechanic shot peening interlock reproducing method |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107570958A (en) * | 2017-09-28 | 2018-01-12 | 楚雄滇中有色金属有限责任公司 | A kind of processing restorative procedure of copper anode plate mould |
| CN108505033A (en) * | 2018-03-21 | 2018-09-07 | 西安交通大学 | The method of induction auxiliary shot-peening refining laser increasing material manufacturing light-alloy crystal grain |
| CN109504968A (en) * | 2019-01-09 | 2019-03-22 | 安徽工业大学 | The reproducing method that laser melting coating and progressive crush are modified |
| CN111992977A (en) * | 2020-07-17 | 2020-11-27 | 国营芜湖机械厂 | Preventive repair research method for stress corrosion damage of main bearing structure of airplane |
| CN112663043A (en) * | 2019-10-16 | 2021-04-16 | 天津大学 | Ultrasonic shot blasting assisted laser additive repair device and repair method thereof |
| CN114845824A (en) * | 2019-10-31 | 2022-08-02 | 株式会社Ibuki | Method for repairing mold and mold |
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| CN103862050A (en) * | 2014-03-31 | 2014-06-18 | 中国科学院西安光学精密机械研究所 | Metal 3D printer based on interlayer shock processing process and printing method thereof |
| WO2014096822A1 (en) * | 2012-12-18 | 2014-06-26 | Brayton Energy Canada, Inc. | Manufacture of hollow parts |
| CN104480476A (en) * | 2014-11-12 | 2015-04-01 | 江苏大学 | Laser thermal combination remanufacturing method for metal damage part |
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2017
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Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
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| WO2014096822A1 (en) * | 2012-12-18 | 2014-06-26 | Brayton Energy Canada, Inc. | Manufacture of hollow parts |
| CN103862050A (en) * | 2014-03-31 | 2014-06-18 | 中国科学院西安光学精密机械研究所 | Metal 3D printer based on interlayer shock processing process and printing method thereof |
| CN104480476A (en) * | 2014-11-12 | 2015-04-01 | 江苏大学 | Laser thermal combination remanufacturing method for metal damage part |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107570958A (en) * | 2017-09-28 | 2018-01-12 | 楚雄滇中有色金属有限责任公司 | A kind of processing restorative procedure of copper anode plate mould |
| CN108505033A (en) * | 2018-03-21 | 2018-09-07 | 西安交通大学 | The method of induction auxiliary shot-peening refining laser increasing material manufacturing light-alloy crystal grain |
| CN109504968A (en) * | 2019-01-09 | 2019-03-22 | 安徽工业大学 | The reproducing method that laser melting coating and progressive crush are modified |
| CN112663043A (en) * | 2019-10-16 | 2021-04-16 | 天津大学 | Ultrasonic shot blasting assisted laser additive repair device and repair method thereof |
| CN114845824A (en) * | 2019-10-31 | 2022-08-02 | 株式会社Ibuki | Method for repairing mold and mold |
| CN111992977A (en) * | 2020-07-17 | 2020-11-27 | 国营芜湖机械厂 | Preventive repair research method for stress corrosion damage of main bearing structure of airplane |
| CN111992977B (en) * | 2020-07-17 | 2022-05-24 | 国营芜湖机械厂 | Preventive repair research method for stress corrosion damage of main bearing structure of airplane |
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Application publication date: 20170922 |