CN104451662A - Combined treatment method for crack repair and strengthening of part in high-temperature working environment - Google Patents
Combined treatment method for crack repair and strengthening of part in high-temperature working environment Download PDFInfo
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- CN104451662A CN104451662A CN201410677425.6A CN201410677425A CN104451662A CN 104451662 A CN104451662 A CN 104451662A CN 201410677425 A CN201410677425 A CN 201410677425A CN 104451662 A CN104451662 A CN 104451662A
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- Prior art keywords
- temperature
- reparation
- crack
- strengthening
- laser melting
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Classifications
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- 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
-
- 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
- C23C14/00—Coating by vacuum evaporation, by sputtering or by ion implantation of the coating forming material
- C23C14/22—Coating by vacuum evaporation, by sputtering or by ion implantation of the coating forming material characterised by the process of coating
- C23C14/48—Ion implantation
Abstract
The invention discloses a combined treatment method for the crack repair and strengthening of a part in a high-temperature working environment. The method comprises the following four major processes: 1, disassembling a damaged cutting tool, removing oil and rust from the surface of the damaged cutting tool at room temperature, cleaning the damaged cutting tool with acetone, and performing surface nondestructive detection to accurately position a surface crack damage defect; 2, performing laser remelting, namely brushing a light absorption material on the surface of the crack, performing constant temperature treatment, pertinently performing laser remelting repair treatment on the rack, and side-blowing helium to protect a laser-remelted part; 3, performing ion implantation, namely performing drying after argon ion sputtering cleaning, performing low-temperature ion implantation, and controlling parameters such as implantation temperature; 4, finishing the surface of the cutting tool, restoring a surface layer, restoring an original protective system on the surface of the cutting tool of shearing equipment, and performing surface nondestructive detection. According to the method, the characteristics of laser remelting and low-temperature ion implantation treatment are fully combined, and the problems of welding deformation, higher heat input, high formation rate of hot cracks in a heat affected area and the like of a common method are solved.
Description
Technical field
The present invention relates to machinofacture and material processing processed and applied technical field, refer in particular to the compounding method of part crack reparation and strengthening under a kind of high-temperature work environment, under being particularly useful for high temperature fatigue condition, there are the defect repair such as microcrack on metal and alloy materials surface, improve its fatigue lifetime, wear resistance, the over-all propertieies such as creep rupture strength.
Background technology
Laser melting (Laser Remelting) is also known as laser glazing.It utilizes high energy laser beam in metallic surface continuous sweep, makes skin layer rapid melting, and under very high thermograde effect, with 10
5~ 10
7dEG C/speed of s cools fast, solidifies, thus make material surface produce special heterogeneous microstructure.Laser energy needed for laser melting is high, and cooling is fast; Crackle and the defect on surface can pass through melting process seam, and surface layer composition segregation reduces, and meta and even the amorphous phases such as height of formation supersaturated solid solution, consolidation layer tissue is very tiny, thus improves the comprehensive mechanical performance of material.Avoid common method welding distortion, heat input is comparatively large, and heat affected zone very easily occurs thermal crack, easily produce in use procedure come off, problems of crack.
Ion implantation technique will speed up in certain high-octane ion beam mutation solid material surface layer, to change a kind of material surface modifying technology of upper layer physics and chemistry character.Its ultimate principle is: be that the ion beam incidence of 100keV magnitude is in material with energy, the atom of ionic fluid and material or molecule by there is series of physical with the reacting to each other of chemistry, incident ion is expended energy gradually, finally stop in the material, and cause material surface composition, stuctures and properties changes, thus optimize material surface performance, or obtain some new excellent properties.
Due to high temperature, the working condition that high pressure etc. are complicated and changeable, such as aerospace, petrochemical complex, power machine industry, complicated load and harsh Working environment have very large impact for the over-all properties such as fatigue, creep, wear resistance of equipment, as easy as rolling off a log crackle and the defect occurring component, have a strong impact on the safety and stability of equipment, cause great potential safety hazard and financial loss.
Laser melting technology and these two technology of cryogenic implantation process combine by the technology of the present invention exactly, make up the two existing defect itself by respective possessed advantage.The component of damage are carrying out ion implantation Combined Processing processing to its surface again after laser melting reparation, be on the one hand that therefore the residual compressive stress produced in high temperature fatigue condition laser melting process can not obtain too large release, the change maintaining high high temperature fatigue life-span of itself bringing because of this repair mode of the laser melting ion implantation surface material structure that brings itself and composition simultaneously improves the over-all properties of material further.This is a dual-use technology, has huge application prospect, have irreplaceable effect, potential tens billion of market to more than one hundred billion in some occasion in fields such as aerospace, automotive industry, petrochemical complex, nuclear industry.
Application number be 201310326112.1 Chinese patent application disclose a kind of technique of metal founding defect mending, fill up casting defect by fusing repair materials, realize the quick reparation of surface imperfection.But utilize surface renovating material to repair in the molten state, the bonding strength of repair materials and base material is low on the one hand, may come off, even cause secondary damage in use subsequently, this method is little on the material hardness impact after its reparation on the other hand, basic maintenance starting material hardness.
Summary of the invention
The object of the invention is to solve component under high-temperature work environment and can not meet extraordinary military service, the therefore problem of the components damage caused, the compounding method of part crack reparation and strengthening under a kind of high-temperature work environment is provided.After the reparation of damage component and strengthening, the mechanical property such as hardness, wear resistance significantly improves, elongated component work-ing life, solves a difficult problem for practical implementation.
The compounding method of part crack reparation and strengthening under a kind of high-temperature work environment, first laser melting repair process is carried out to microcrack, reach reparation object, then cryogenic implantation process is carried out to it, the comprehensive mechanical property improving material, increases substantially the fatigue lifetime of material.Concrete reparation and reinforcing process process as follows:
1st step: carry out oil removing, rust cleaning to piece surface under room temperature, and clean up with acetone, prevents from entering inclusion and defect in consolidation process, affects quality and the repairing effect of consolidation.
2nd step: carry out surface nondestructive detection to component, accurate orientated damage position, the main method adopting non-destructive test(ing)(NDT), to detect the particular location, shape, size etc. of piece surface hair line.
3rd step: crack surfaces brush strengthens absorbing material, and the selection of absorbing material is not single, mixed easily causes producing chemical reaction in laser treatment process, therefore preferably uses a kind ofly to strengthen absorbing material, such as pitch-dark, and is positioned in 200 DEG C of thermostat containers and is incubated 2h.
4th step: application multifunctional numerical control laser apparatus carries out laser melting reparation to fragmented parts, and helium injection gas is to protect laser melting position simultaneously.
5th step: polishing, acetone cleaning, drying are carried out to piece surface after laser melting reparation.
6th step: argon ion sputtering, dry.
7th step: ion implantation.
8th step: surfacing is carried out to the part after strengthening, makes it reach surface quality requirements.
9th step: recover to shear the original securing system of piece surface.
10th step: carry out nondestructive testing to repair member, until repaired.
Technical program of the present invention lies in the feature fully combining laser melting and cryogenic implantation process, avoid common method welding distortion, heat input is comparatively large, and heat affected zone very easily occurs thermal crack, easily produce in use procedure come off, problems of crack.First laser melting repair crack is carried out to part, make skin layer base material rapid melting, and under very high thermograde effect, with 10
5~ 10
7dEG C/speed of s cools fast, solidifies, thus make material surface produce special heterogeneous microstructure.Consolidation layer tissue is very tiny, thus improves the comprehensive mechanical performance of material; The performances such as the stress that in consolidation layer, martensitic transformation produces is larger, improves the antifatigue of workpiece, wear-resisting.Again cryogenic implantation is carried out to it, effectively improves the intensity of part, wear resistance and fatigue lifetime etc. mechanical property.
Advantage of the present invention is as follows:
1) laser melting can form fine and close metal level at rejected region, avoids the shortcoming that traditional repair mode easily comes off, ftractures, limits the release of residual compressive stress simultaneously, increase substantially the over-all propertieies such as surface imperfection component intensity and wear resistance.
2) the multiple performance requriements of workpiece can be met: this compounding method to component surface strengthening modification under hot environment, and can not only be applicable to other structural part, improves workpiece hardness, wear resistance, solidity to corrosion, fatigue strength.
3) after this Combined Processing, the distortion of component is very little.After Combined Processing, substantially indeformable, the appearance uniform of workpiece, can be used as product and finally processes;
4) this composite treatment technology feature of environmental protection is excellent, without any pollution.Avoid adopting melt down, the way of recycling such as smelting time secondary pollution to environment, be green manufacturing again.
Accompanying drawing explanation
Fig. 1 is the process flow sheet of the specific embodiment of the invention.
Embodiment
For tool surface reparation, with reference to accompanying drawing, the present invention is further elaborated.
As shown in Figure 1, entirety of the present invention comprises four bulk flow processs, and the first, dismounting damage cutter, carries out oil removing to its surface under room temperature, rust cleaning, and cleans up with acetone; Then surface nondestructive detection is carried out, effects on surface Crack Damage precise defect location; The second, laser melting: at crack surfaces brush light absorbing material, and carry out constant temperature process; Have for laser melting repair process is carried out to cracks, helium side-blown protection laser melting position; 3rd, ion implantation: dry after argon ion sputtering cleaning, then carry out cryogenic implantation, control the parameters such as implantation temperature; 4th, tool surface finishing, upper layer recover, and recover shear the original securing system of equipment tool surface and carry out surface nondestructive detection.Specific as follows:
Under room temperature, surface preparation is carried out to part, oil removing, rust cleaning, and clean up with acetone; Carry out surface nondestructive detection to parts, accurate orientated damage position, determines the particular location of each crackle, shape, size;
Surface brush light absorption paint, and be positioned in 200 DEG C of thermostat containers and be incubated 2h; Application multifunctional numerical control laser processing suite of equipment have for effects on surface defect and fragmented parts carry out laser melting reparation, laser power 2000W, sweep velocity 20mm/s, the protection of helium side-blown simultaneously laser melting position.Laser melting terminates rear surface and carries out polishing, acetone cleaning, drying treatment successively.Adopt argon ion sputtering mode to clean 30min again, remove the oxide compound of piece surface remnants, oil stain and chip, and then drying treatment.
Time ion implantation, Implantation Energy is 70keV, and beam current density is 10uA/cm
2, top temperature is no more than 250 DEG C, and injecting metering is 1 × 10
17ion/cm
2, vacuum tightness is 7 × 10
-6torr.
After Ion Implantation Strengthening, surfacing is carried out to part, reaches surface quality requirements, finally again nondestructive testing is carried out to part, do not meet specification of quality then circulation step 1-3 until the whole crack forming mechanism process of part completes.
The present invention, after laser melting is repaired, damage location has been repaired and has produced residual compressive stress, because residual compressive stress plays a part negative mean stress in fatigue loading, can the germinating of delay fatigue crackle.But it should be noted that, the residual compressive stress of material surface will greatly discharge in the high temperature fatigue environment of thermal stresses, thermal strain, after cryogenic implantation, the release of unrelieved stress will be suppressed, thus the crack propagation suppressing part to cause in high temperature fatigue environment, improve its thermal fatigue property, wear resistance and creep rupture strength.
The laser melting technology that the present invention adopts utilizes its own face thin layer rapid melting repair crack and defect, there is not the problem that the later stage comes off, and due to consolidation layer tissue very tiny, the stress that in consolidation layer, martensitic transformation produces is large, crackle and the defect on surface can pass through melting process seam, surface layer composition segregation reduces, and meta and even the amorphous phases such as height of formation supersaturated solid solution, can significantly improve the mechanical propertys such as tool surface intensity, wear resistance, fatigue lifetime.Not only effectively reduce the release of residual compressive stress at the cryogenic implantation carried out subsequently, further improve the over-all properties of piece surface simultaneously.
Claims (6)
1. a compounding method for part crack reparation and strengthening under high-temperature work environment, is characterized in that comprising the steps:
1) surface preparation is carried out to part, oil removing, rust cleaning, then carry out surface nondestructive detection, orientated damage position, determine the particular location of each crackle, shape, size;
2) laser melting reparation is carried out to the crackle of the piece surface detected;
3) repairing position to laser melting carries out ion implantation.
2. the compounding method of part crack reparation and strengthening under high-temperature work environment according to claim 1, it is characterized in that: in step 1, under room temperature, oil removing, rust cleaning are carried out to piece surface, and clean up with acetone, afterwards surface nondestructive detection is carried out to part, then strengthen absorbing material at crack surfaces brush, and be positioned in thermostat container and be incubated 2h, incubator set point is that to strengthen absorbing material assimilation effect best and do not affect the temperature range of the performance of component own.
3. the compounding method of part crack reparation and strengthening under high-temperature work environment according to claim 1, it is characterized in that: in step 2, laser melting reparation adopts multifunctional numerical control laser apparatus to carry out laser melting reparation to crackle, laser power is 2500W, sweep velocity is 10mm/s, and helium injection gas is to protect laser melting position simultaneously; Laser melting terminates rear surface and carries out polishing, acetone cleaning, drying treatment successively.
4. the compounding method of part crack reparation and strengthening under high-temperature work environment according to claim 2, is characterized in that: it is pitch-dark for strengthening absorbing material, and calorstat temperature is set as 200 DEG C.
5. the compounding method of part crack reparation and strengthening under high-temperature work environment according to claim 3, it is characterized in that: after polishing, acetone cleaning, drying treatment being carried out to the piece surface after laser melting reparation in step 2, argon ion sputtering mode is adopted to clean 30min again, remove the oxide compound of piece surface remnants, oil stain and chip, and then drying treatment.
6. the compounding method of part crack reparation and strengthening under the high-temperature work environment according to any one of claim 1-5, is characterized in that: in step 3, and time ion implantation, Implantation Energy is 70keV, and beam current density is 10uA/cm
2, top temperature is no more than 250 DEG C, and injecting metering is 1 × 10
17ion/cm
2, vacuum tightness is 7 × 10
-6torr; After Ion Implantation Strengthening, surfacing is carried out to part, reaches surface quality requirements, finally again nondestructive testing is carried out to part, do not meet specification of quality then circulation step 1-3 until the whole crack forming mechanism process of part completes.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410677425.6A CN104451662A (en) | 2014-11-21 | 2014-11-21 | Combined treatment method for crack repair and strengthening of part in high-temperature working environment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410677425.6A CN104451662A (en) | 2014-11-21 | 2014-11-21 | Combined treatment method for crack repair and strengthening of part in high-temperature working environment |
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|---|---|
| CN104451662A true CN104451662A (en) | 2015-03-25 |
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|---|---|---|---|
| CN201410677425.6A Pending CN104451662A (en) | 2014-11-21 | 2014-11-21 | Combined treatment method for crack repair and strengthening of part in high-temperature working environment |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106777484A (en) * | 2016-11-18 | 2017-05-31 | 西安建筑科技大学 | A kind of computational methods of surface crack growth shape |
| CN111519015A (en) * | 2020-04-17 | 2020-08-11 | 东南大学 | Bearing steel member and surface laser melting-ion implantation composite strengthening method thereof |
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| JPS6059020A (en) * | 1983-09-13 | 1985-04-05 | Mitsubishi Heavy Ind Ltd | Production of bearing |
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| CN102995001A (en) * | 2011-09-13 | 2013-03-27 | 吉林大学 | Method for restoring fatigue cracks of die through laser |
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2014
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Patent Citations (6)
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|---|---|---|---|---|
| JPS6059020A (en) * | 1983-09-13 | 1985-04-05 | Mitsubishi Heavy Ind Ltd | Production of bearing |
| EP1029629A2 (en) * | 1999-02-17 | 2000-08-23 | EUROMAT Gesellschaft für Werkstofftechnologie und Transfer mbH | Process for applying a protective coating on the surface of workpieces; alloy and solder used therefor |
| CN101204767A (en) * | 2006-12-22 | 2008-06-25 | 沈阳大陆激光技术有限公司 | Process of using laser welding clot technology repair gear axis cervical |
| CN101633109A (en) * | 2009-08-12 | 2010-01-27 | 江苏大学 | Method for reproducing high-temperature fatigue damage component |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106777484A (en) * | 2016-11-18 | 2017-05-31 | 西安建筑科技大学 | A kind of computational methods of surface crack growth shape |
| CN111519015A (en) * | 2020-04-17 | 2020-08-11 | 东南大学 | Bearing steel member and surface laser melting-ion implantation composite strengthening method thereof |
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Application publication date: 20150325 |