CN105252203B - The restorative procedure of mould crackle - Google Patents
The restorative procedure of mould crackle Download PDFInfo
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- CN105252203B CN105252203B CN201510679032.3A CN201510679032A CN105252203B CN 105252203 B CN105252203 B CN 105252203B CN 201510679032 A CN201510679032 A CN 201510679032A CN 105252203 B CN105252203 B CN 105252203B
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23P—METAL-WORKING NOT OTHERWISE PROVIDED FOR; COMBINED OPERATIONS; UNIVERSAL MACHINE TOOLS
- B23P6/00—Restoring or reconditioning objects
- B23P6/04—Repairing fractures or cracked metal parts or products, e.g. castings
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Abstract
The invention discloses a kind of restorative procedure of mould crackle, crackle will be divided into two classes by it according to the width and depth of crackle：The width of a class crackles is between 0.5~3mm, depth is between 1~5mm；The width of b class crackles is in more than 3mm, depth in more than 5mm；Size according to above-mentioned crackle is repaired by the restorative procedure of a class crackles and the restorative procedure of b class crackles respectively.The restorative procedure can be repaired to width in 0.5, depth in more than 1mm larger crackle.
Description
Technical field
It is especially that a kind of use manual arc is combined with laser compound phase the invention belongs to mould repair technical field
The restorative procedure of mould crackle.
Background technology
China's Die Industry was developed rapidly in the last few years, had been ranked among big as the third place in the world for being only second to two countries of Japan and the United States
Mould producing country.Compared with the external advanced mould level of production, also there is a big difference for the Die Industry of China, is mainly manifested in system
Make that cycle length, the accuracy of manufacture be low, die life it is short in terms of, the problem of wherein die life is short is especially prominent, directly results in
The wasting of resources and the rising of production cost.Therefore, repairing and reusing is carried out to failure mould using modern high technology technological means,
Extend the mold use time, so as to retrieve loss unnecessary in production, it will promote the hair of industry and national economy significantly
Exhibition, with significant economic benefit and social effect.
During actual mould production and application, various moulds after Reusability because can exist different degrees of
Abrasion, occasionally there are scratch, corrosion.More serious, die surface can produce the crackle for extending to mould inside, cause mould to lose
Imitate and scrap, cause significant wastage.Therefore, it is at present to use mould repair technology in order to reduce loss more, failure mould is carried out
Repairing and reusing, the failure mould repair method commonly used at this stage mainly includes technology for repairing surfacing, thermal spraying recovery technique, swashed
Light consolidation technology, laser melting and coating technique, laser silk filling technology and manual TIG silk filling technology.
Different restorative procedures is mostly used according to flaw size difference at present.In the prior art to width in mould
In 0.5, depth in below 1mm shallow crackle, repaired more using laser melting method.And for width in 0.5, depth
The big crackle spent in more than 1mm is then repaired by manual TIG silk filling more, but is due to that cooling velocity is slow so that weld seam
It is mingled with substantial amounts of hard carbide in tissue coarse grains, and seam organization, so that cause weld metal zone fragility big, low intensity,
Easily ftractureed in the presence of heat fatigue stress, and the souring and sticking action during casting can send out face of weld again
Raw brittle flaking off, forms pit, causes the secondary failure of mould.Therefore, for these reasons, it would be highly desirable to need one kind can be to width
The restorative procedure for the mould crackle repaired in 0.5, depth in more than 1mm larger crackle is spent, to solve the above problems.
The content of the invention
The technical problem to be solved in the present invention be to provide it is a kind of can to width in 0.5, depth in the larger of more than 1mm
The restorative procedure for the mould crackle that crackle is repaired.
The technical scheme is that there is provided a kind of restorative procedure of mould crackle,
Crackle will be divided into according to the width and depth of crackle by two classes：The width of a class crackles is between 0.5~3mm, depth
Between 1~5mm；The width of b class crackles is in more than 3mm, depth in more than 5mm；
The reparation of a class crackles comprises the following steps：
(1) die surface cracked zone, is rooted out with hand operated grinding wheel；
(2) the heat fatigue layer of mould, is removed；
(3) ultrasonic examination, is carried out to cracked zone, if still with the presence of crackle, return to step (1)；Otherwise, perform
Step (4)；
(4), area to be repaired is cleaned up with cleaning agent；
(5), using manual preposition wire feeding mode, manual TIG silk filling is carried out to area to be repaired and is repaired, TIG is formed and repairs
Layer；
(6) removing surface, is carried out to completed TIG repair layers, brushes repair layer surface scale, then use cleaning agent
Removing surface is clean；
(7) acetone and Agent Powder, are reconciled into pasty state, it is uniformly applied to TIG repair layer tables with flat hairbrush
Face, coating layer thickness 0.01-0.5mm；After activating agent to be applied is fully dried, fast laser remelting is carried out；
The reparation of b class crackles comprises the following steps：
(1) die surface cracked zone, is rooted out with hand operated grinding wheel；
(2) the heat fatigue layer of mould, is removed；
(3) ultrasonic examination, is carried out to cracked zone, if still with the presence of crackle, return to step (1)；Otherwise, perform
Step (4)；
(4), area to be repaired is cleaned up with cleaning agent；
(5) simulation reparation, is carried out with computer, welding parameter is corrected；
(6), using manual preposition wire feeding mode, the silk filling of multilayer multiple tracks manual TIG is carried out to area to be repaired and is repaired, is formed
TIG repair layers；
(7) removing surface, is carried out to completed TIG repair layers, brushes repair layer surface scale, then use cleaning agent
Removing surface is clean；
(8) acetone and Agent Powder, are reconciled into pasty state, it is uniformly applied to TIG repair layer tables with flat hairbrush
Face, coating layer thickness 0.01-0.5mm；After activating agent to be applied is fully dried, multiple tracks fast laser remelting is carried out, until
Whole TIG repair layers are paved with.
Described manual TIG silk filling technological parameter is according to mold materials, mould operating mode, crackle form, reparation ply stress
Numerical results and fast laser consolidation are required manual repair layer surface smoothness and formulated；Wherein, closed for repairing aluminium
Using pulsed argon arc silk filling technique during golden mould crackle, design parameter is：20~400A of peak point current, background current 20~
400A, 2~15Hz of pulse frequency, dutycycle 5%~95%, 2~15mm of arc length, 2~20mm of tungsten electrode extension elongation, tungsten electrode diameter
0.5~4.0mm, 10~1000mm/min of speed of welding, 10 °~60 ° of angle of silk filling, 2~10L/min of argon flow amount, welding wire are adopted
With with mother metal with material welding wire, 0.5~2.5mm of diameter；Filled out during for repairing hot-work die and forging die crackle using direct current argon arc
Silk technique, design parameter is：The straight polarity direct current of power supply connection, 20~300A of welding current, 2~15mm of arc length, tungsten electrode extension elongation 2
~20mm, 0.5~4.0mm of tungsten electrode diameter, 10~1000mm/min of speed of welding, 10 °~60 ° of angle of silk filling, argon flow amount 2~
10L/min, welding wire is used with mother metal with material welding wire, 0.5~2.5mm of diameter.
The activating agent that the fast laser fused craft is used is Cr2O3Activating agent, SiO2Activating agent or Cr2O3+SiO2It is multiple
Close activating agent；Laser used is YAG solid state lasers, and the fast laser fused craft is according to manual TIG silk filling repair layer
Surface size and structure property, mould operating mode, product surface quality require to formulate, the welding electricity of specific fast laser fused craft
Flow 30~200A, 0.1~2.5mm/s of speed of welding, 2~15ms of pulsewidth, 2~15Hz of frequency, defocusing amount -10~10mm, protection
2~10L/min of gas flow.
After above method, the present invention compared with prior art, with advantages below：
The restorative procedure of inventive die crackle uses different restorative procedures according to flaw size difference, right respectively
The width of a class crackles is between 0.5~3mm, depth between 1~5mm, the width of b class crackles is in more than 3mm, depth in 5mm
Repaired above, and repair layer is filled silk after fast laser remelting using manual TIG, weld seam textura epidermoidea is thin
Change, crystal grain substantially diminishes, and the hard carbide in tissue is completely dissolved, so that, intensity gets a promotion, and wearability increases greatly
By force；Weld seam interior tissue there occurs a lonneal processing in the presence of laser melting so that tissue distortion of lattice degree
Weaken, the reduction of the degree of super saturation of martensite, this lonneal processing reduces tissue internal stress, enhance tissue toughness and
Plasticity, the Thermal fatigue properties for improving restoring area by a relatively large margin.Wherein, fast laser fused craft can melt TIG
The hard carbide on weld seam top layer, thinning microstructure crystal grain so that the performance such as plasticity, toughness, intensity of repair layer is more uniform, compared with
The thermal fatigue resistance and wearability of repair layer are enhanced in big degree, manual TIG silk filling technique repairing mould weld seam is solved strong
The problem of degree is low, easy to crack.The addition of activating agent, can effectively shrink laser plasma, change weld pool surface tension force and temperature
Gradient, improves absorptivity of the material to laser energy, and good fusion penetration can be obtained while laser is quickly scanned, and increase is molten
Pond cooling velocity, plastic property of weld bead is lifted by a relatively large margin, and face of weld shaping is more preferable, further increases complex repairation layer table
Surface intensity；Mould after being repaired by the present invention, service life is greatly improved.
Brief description of the drawings
Fig. 1 is the front view that manual TIG fills silk with fast laser consolidation complex repairation layer.
Fig. 2 is the cross-sectional view that manual TIG fills silk with fast laser consolidation complex repairation layer.
1, die matrix shown in figure, 2, manual TIG fill silk repair layer, 3, TIG weld heat-affected zones, 4, TIG weld metal zones,
5th, fast laser consolidation weld heat-affected zone, 6, fast laser consolidation weld metal zone, 7, fast laser consolidation strengthening layer.
Embodiment
The invention will be further described with specific embodiment below in conjunction with the accompanying drawings.
As shown in Figure 1 and Figure 2, the restorative procedure of a kind of mould crackle of the invention,
Crackle is divided into by two classes according to the width and depth of crackle：The width of a class crackles is between 0.5~3mm, depth exists
Between 1~5mm；The width of b class crackles is in more than 3mm, depth in more than 5mm；
The reparation of a class crackles comprises the following steps：
(1) die surface cracked zone, is rooted out with hand operated grinding wheel；
(2) the heat fatigue layer of mould, is removed；
(3) ultrasonic examination, is carried out to cracked zone, if still with the presence of crackle, return to step (1)；Otherwise, perform
Step (4)；So ensure crackle cleaning completion；
(4), area to be repaired is cleaned up with cleaning agent, to be ready for repairing；
(5), using manual preposition wire feeding mode, manual TIG silk filling is carried out to area to be repaired and is repaired, TIG is formed and repairs
Layer；
(6) removing surface, is carried out to completed TIG repair layers, repair layer surface scale is brushed with electronic iron brush,
It is with cleaning agent that removing surface is clean again；
(7) acetone and Agent Powder, are reconciled into pasty state, it is uniformly applied to TIG repair layer tables with flat hairbrush
Face, coating layer thickness 0.01-0.5mm；After activating agent to be applied is fully dried, fast laser remelting is carried out；Manual arc
Constituted with fast laser consolidation complex repairation layer by manual TIG silk filling repair layer 2 and fast laser consolidation strengthening layer 7 are compound, soon
Fast laser melting strengthening layer 7 is located at manual TIG silk filling repair layer 2 top, wherein, the manual TIG silk filling repair layer 2 includes
TIG weld metal zones 4 and TIG weld heat-affected zones 3, the fast laser consolidation strengthening layer 7 include the He of fast laser consolidation weld metal zone 6
Fast laser consolidation weld heat-affected zone 5.
The manual arc is 1~10mm with fast laser consolidation complex repairation slice width degree W1, and thickness H1 is 0.1~6mm；
Fast laser consolidation weld seam sector width W2 is 1~10mm, and thickness H2 is 0.1~2mm；Fast laser consolidation weld heat-affected zone is thick
Degree H3 is 0.05~1mm；It is 0.2~5mm that fast laser consolidation weld seam, which overlaps width W3,；TIG weld seam sector widths W4 be 0.5~
9mm, thickness H4 are 0.1~5mm；TIG weld heat-affected zone thickness H5 is 0.05~2mm.
The reparation of b class crackles comprises the following steps：
(1) die surface cracked zone, is rooted out with hand operated grinding wheel；
(2) the heat fatigue layer of mould, is removed；
(3) ultrasonic examination, is carried out to cracked zone, if still with the presence of crackle, return to step (1)；Otherwise, perform
Step (4)；
(4), area to be repaired is cleaned up with cleaning agent；
(5) simulation reparation, is carried out with computer, welding parameter is corrected, that is, the simulation for first passing through computer progress data is repaiied
It is multiple, welding parameter is corrected according to the result of simulation amendment, the computer software used is marc softwares.
(6), using manual preposition wire feeding mode, the silk filling of multilayer multiple tracks manual TIG is carried out to area to be repaired and is repaired, is formed
TIG repair layers；
(7) removing surface, is carried out to completed TIG repair layers, brushes repair layer surface scale, then use cleaning agent
Removing surface is clean；
(8) acetone and Agent Powder, are reconciled into pasty state, it is uniformly applied to TIG repair layer tables with flat hairbrush
Face, coating layer thickness 0.01-0.5mm；After activating agent to be applied is fully dried, multiple tracks fast laser remelting is carried out, until
Whole TIG repair layers are paved with.If the strengthening layer width that the fast laser fused craft processing is obtained is repaired less than the TIG
Slice width degree, repairs layer surface in TIG and carries out multiple fast laser remelting side by side, until whole TIG repair layers are paved with, obtain
To mould crackle manual arc of the present invention and fast laser consolidation complex repairation layer.
Described manual TIG silk filling technological parameter is according to mold materials, mould operating mode, crackle form, reparation ply stress
Numerical results and fast laser consolidation require manual repair layer surface smoothness and formulated that is, following data are logical
Cross above-mentioned requirements and draw；Wherein, for repairing during aluminum alloy mould crackle using pulsed argon arc silk filling technique, design parameter
For：20~400A of peak point current, 20~400A of background current, 2~15Hz of pulse frequency, dutycycle 5%~95%, arc length 2~
15mm, 2~20mm of tungsten electrode extension elongation, 0.5~4.0mm of tungsten electrode diameter, 10~1000mm/min of speed of welding, silk filling angle
10 °~60 °, 2~10L/min of argon flow amount, welding wire are used with mother metal with material welding wire, 0.5~2.5mm of diameter；For repairing
Using direct current argon arc silk filling technique when hot-work die and forging die crackle, design parameter is：The straight polarity direct current of power supply connection, welding current
20~300A, 2~15mm of arc length, 2~20mm of tungsten electrode extension elongation, 0.5~4.0mm of tungsten electrode diameter, speed of welding 10~
1000mm/min, 10 °~60 ° of angle of silk filling, 2~10L/min of argon flow amount, welding wire are used with mother metal with material welding wire, diameter
0.5~2.5mm.
The activating agent that the fast laser fused craft is used is Cr2O3Activating agent, SiO2Activating agent or Cr2O3+SiO2It is multiple
Close activating agent；Laser used is YAG solid state lasers, and the fast laser fused craft is according to manual TIG silk filling repair layer
Surface size and structure property, mould operating mode, product surface quality require to formulate, the welding current 30 of specific fast laser consolidation
~200A, 0.1~2.5mm/s of speed of welding, 2~15ms of pulsewidth, 2~15Hz of frequency, defocusing amount -10~10mm, protective gas
2~10L/min of flow.
It is a specific embodiment using this method below：
A kind of big crackle manual TIG of Dievar materials die casting fills silk and fast laser consolidation combined-repair method
Mould crackle is analyzed, crack form and size are detected using ultrasonic examination, width is 1.5mm, depth
3mm；The failure big crackle of mould is handled, die surface cracked zone is rooted out using hand operated grinding wheel, double V-groove, depth is obtained
For 3mm, width is 5.2mm.Then ultrasonic examination is carried out again to the cracked zone after processing, it is ensured that crackle is cleaned out, adopted
Area to be repaired is cleaned out with cleaning agent.Using Manual direct current argon arc (TIG) silk filling renovation technique, welding wire selects diameter
0.5mm Dievar material welding wires, power supply connection straight polarity direct current, welding current 60A, arc length 4mm, speed of welding 130mm/min,
Tungsten electrode extension elongation 2mm, shield gas flow rate 8L/min, fill silk 15 ° of angle, and the manual preposition wire feed of wire feeding mode, repair layer is most
Amount is smooth, is easy to consequent activities laser treatment.According to TIG repair layer surface sizes, 2 fast lasers are carried out side by side on its surface
Remelting.Because manual TIG uses Dievar material welding wires, repair layer hardness 385Hv is obtained less than Dievar materials according to it
Die casting hardness 425Hv, organizes coarse grains and is mingled with substantial amounts of hard carbide, according to this repair layer structure property,
Fast laser fused craft selects Nd3+:YAG solid state lasers, size of current 100A, speed of welding 0.5mm/s, pulsewidth 8ms,
Frequency 5Hz, defocusing amount 6.5mm, shield gas flow rate 10L/min.Brush TIG repair layer surface scales with electronic iron, then
It is with cleaning agent that removing surface is clean, by acetone and Cr2O3+SiO2Composite reactive agent powder reconciles into pasty state, Cr2O3Account for 70%,
SiO230% is accounted for, it is uniformly applied to TIG with flat hairbrush repairs layer surface, and thickness is 0.1mm.Activating agent to be applied fills
Divide after drying, carry out fast laser remelting, finally give a kind of manual TIG and fill silk and fast laser consolidation complex repairation
Layer；Repair layer is combined with 2 road fast laser consolidation strengthening layers by 1 road manual TIG silk filling repair layer and constituted, and repair layer width W1 is
5.5mm, thickness H1 are 2.5mm, and fast laser consolidation weld seam sector width W2 is 2.5mm, and thickness H2 is 1mm, fast laser consolidation
Heat affected area thickness H3 is 0.1mm, and the overlapping place width W3 of weld seam is 1mm, and TIG weld seam sector widths W4 is 3.5mm, and thickness H4 is
3.2mm, TIG weld heat-affected zone thickness H5 are 0.4mm, and fast laser consolidation repair layer stiffened region hardness average value reaches 570Hv,
Fast laser consolidation heat affected area hardness average out to 520Hv, the hardness of repair layer is higher than the hardness of matrix.
Manual TIG fills silk repair layer after fast laser remelting, and weld seam surface layer ferrite grain refinement, crystal grain substantially becomes
Small, the hard carbide in tissue is completely dissolved, so that, intensity is got a promotion, and wearability is greatly enhanced；Weld seam interior tissue
A lonneal processing is there occurs in the presence of laser melting so that tissue distortion of lattice degree weakens, the mistake of martensite
Degree of saturation is reduced, and this lonneal processing reduces tissue internal stress, enhances tissue toughness and plasticity, by a relatively large margin
Improve the Thermal fatigue properties of restoring area.Manual TIG through the present embodiment fills silk and the big crack forming mechanism of fast laser consolidation
The service life of the Dievar material die castings of method reparation extends more than 20% on the basis of original service life.
Only highly preferred embodiment of the present invention is described above, but is not to be construed as limiting the scope of the invention.This
Invention is not limited only to above example, and its concrete structure allows to change.In every case in the protection model of independent claims of the present invention
Enclose interior made various change within the scope of the present invention.
Claims (3)
1. a kind of restorative procedure of mould crackle, it is characterised in that：
Crackle is divided into by two classes according to the width and depth of crackle：The width of a class crackles is between 0.5~3mm, depth 1~
Between 5mm；The width of b class crackles is in more than 3mm, depth in more than 5mm；
The reparation of a class crackles comprises the following steps：
(1) die surface cracked zone, is rooted out with hand operated grinding wheel；
(2) the heat fatigue layer of mould, is removed；
(3) ultrasonic examination, is carried out to cracked zone, if still with the presence of crackle, return to step (1)；Otherwise, step is performed
(4)；
(4), area to be repaired is cleaned up with cleaning agent；
(5), using manual preposition wire feeding mode, manual TIG silk filling is carried out to area to be repaired and is repaired, TIG repair layers are formed；
(6) removing surface, is carried out to completed TIG repair layers, brushes repair layer surface scale, then with cleaning agent by table
Face is cleaned out；
(7) acetone and Agent Powder, are reconciled into pasty state, it is uniformly applied to TIG with flat hairbrush repairs layer surface, applies
Thickness degree 0.01-0.5mm；After activating agent to be applied is fully dried, fast laser remelting is carried out；
The reparation of b class crackles comprises the following steps：
(1) die surface cracked zone, is rooted out with hand operated grinding wheel；
(2) the heat fatigue layer of mould, is removed；
(3) ultrasonic examination, is carried out to cracked zone, if still with the presence of crackle, return to step (1)；Otherwise, step is performed
(4)；
(4), area to be repaired is cleaned up with cleaning agent；
(5) simulation reparation, is carried out with computer, welding parameter is corrected；
(6), using manual preposition wire feeding mode, the silk filling of multilayer multiple tracks manual TIG is carried out to area to be repaired and is repaired, TIG is formed
Repair layer；
(7) removing surface, is carried out to completed TIG repair layers, brushes repair layer surface scale, then with cleaning agent by table
Face is cleaned out；
(8) acetone and Agent Powder, are reconciled into pasty state, it is uniformly applied to TIG with flat hairbrush repairs layer surface, applies
Thickness degree 0.01-0.5mm；After activating agent to be applied is fully dried, multiple tracks fast laser remelting is carried out, until whole
TIG repair layers are paved with.
2. the restorative procedure of mould crackle according to claim 1, it is characterised in that：Described manual TIG silk filling technique ginseng
Number is to craft according to mold materials, mould operating mode, crackle form, repair layer Numerical analysis of stress result and fast laser consolidation
Repair layer surface smoothness is required and formulated；Wherein, for repairing using pulsed argon arc silk filling technique during aluminum alloy mould crackle,
Design parameter is：20~400A of peak point current, 20~400A of background current, 2~15Hz of pulse frequency, dutycycle 5%~95%,
2~15mm of arc length, 2~20mm of tungsten electrode extension elongation, 0.5~4.0mm of tungsten electrode diameter, 10~1000mm/min of speed of welding, fill out
10 °~60 ° of angle of silk, 2~10L/min of argon flow amount, welding wire are used with mother metal with material welding wire, 0.5~2.5mm of diameter；With
Using direct current argon arc silk filling technique when hot-work die and forging die crackle is repaired, design parameter is：The straight polarity direct current of power supply connection, weldering
Connect 20~300A of electric current, 2~15mm of arc length, 2~20mm of tungsten electrode extension elongation, 0.5~4.0mm of tungsten electrode diameter, speed of welding 10
~1000mm/min, filled silk 10 °~60 ° of angle, 2~10L/min of argon flow amount, and welding wire is used with mother metal with material welding wire, directly
0.5~2.5mm of footpath.
3. the restorative procedure of mould crackle according to claim 1, it is characterised in that：The fast laser fused craft is used
Activating agent be Cr2O3Activating agent, SiO2Activating agent or Cr2O3+SiO2Composite reactive agent；Laser used is YAG Solid State Lasers
Device, the fast laser fused craft is according to manual TIG silk filling repair layer surface size and structure property, mould operating mode, product
Surface quality requirements are formulated, 30~200A of welding current of specific fast laser fused craft, 0.1~2.5mm/s of speed of welding,
2~15ms of pulsewidth, 2~15Hz of frequency, defocusing amount -10~10mm, 2~10L/min of shield gas flow rate.
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| CN103343338B (en) * | 2013-06-29 | 2015-04-29 | 苏州唐氏机械制造有限公司 | Laser restoration method of flaring die |
| CN103521923A (en) * | 2013-09-27 | 2014-01-22 | 昆山纯柏精密五金有限公司 | Method for adopting laser fuse wires for repairing mold |
| CN103911612B (en) * | 2014-04-25 | 2016-04-06 | 山东大学 | The Cr12MoV cold punching die laser repairing process that wolfram varbide is cladding alloy is added with cobalt-based |
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2015
- 2015-10-19 CN CN201510679032.3A patent/CN105252203B/en not_active Expired - Fee Related
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