CN101633109B - Method for reproducing high-temperature fatigue damage component - Google Patents
Method for reproducing high-temperature fatigue damage component Download PDFInfo
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- CN101633109B CN101633109B CN2009101843051A CN200910184305A CN101633109B CN 101633109 B CN101633109 B CN 101633109B CN 2009101843051 A CN2009101843051 A CN 2009101843051A CN 200910184305 A CN200910184305 A CN 200910184305A CN 101633109 B CN101633109 B CN 101633109B
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Abstract
The invention discloses a method for reproducing a high-temperature fatigue damage component, carrying out a compound process of ion injection and laser attack on a production apparatus with small crackles (or damages). The ion injection can fill the small crackles, during the process of injecting, a large amount of solute atoms and vacancies can be guided in to form various dislocations and analyze metallic compounds or various alloy phases, thereby strengthening materials, improving the antifraying characteristic and high-temperature oxidation resistance, improving the fatigue resistance or controlling a modified layer to malleableize; the laser attack is carried out on the component, under the effect of high pressure of a laser shock wave, the metal surface generates microplastic deformation to form a high-amplitude residual pressure stress layer, thereby effectively improving the mechanical performance of metal materials, especially the fatigue life.
Description
Technical field
The present invention relates to the re-manufacturing technology field of fatigue at high temperature parts, refer in particular to the reproducing method of smelting iron and steel production equipment high-temperature damage parts, being particularly useful for the surface has the pelletizing of fine crack (or damage) to smelt the manufacturing again of producing the equipment key component.
Background technology
At present, along with the rapid growth of rapid development of economy and population, the shortage of water, soil, the energy and mineral resources will be more and more serious, presses for energy savings and environmental protection.This just means greatly develops recycling economy, and that quickens constructing economical society seems particularly important and urgent.Feasibility that product is made again and feasible degree be develop again the high vital part of the problem that manufacturing industry primarily faces, particularly added value of product (manpower, the energy etc.) whether can repair and do not need the replacement.Whether the part remanent fatigue life enough keeps next life cycle, is to make the important technological problems that faces again.The principal mode of part failure has fracture, wearing and tearing, corrosion and distortion; Wherein, Directly perceived perhaps being easy to of wearing and tearing, corrosion and deformation ratio detected; Be difficult for detecting the fatigue life that only causes fracture, and the manufacturing property again of therefore studying manufacture a product again vital part remanent fatigue life and product has great importance.
Pelletizing smelt to produce the equipment key component at normal temperature in the environment of high temperature back and forth during operation work; Temperature is in the medium-term and long-term operation of the alternating temperature-changing environment of normal temperature to 1050 ℃ in its running, and the operation that in such alternating temperature-changing field, moves in circles is because the alternation hot environment forms the thermal expansion and the alternating thermal stress of complicacy; Cause the heat-resistant piece service life short; In this chilling and shock heating environment, through after certain life cycle, the inner fine cracks that exists of parts, be mingled with, defective such as segregation; Under the pulsating stress effect, fine crack appears inevitably.Fine crack expansion, and then the initiation security incident that lost efficacy in case generation will be taken advantage of a situation.In order to develop a circular economy and to guarantee the safe handling of structure, it is made again is very necessary.Consider the special running environment that the equipment key component is produced in the pelletizing smelting, technology of the present invention will have the production equipment key component of fine crack (or damage) to carry out ion injection and laser-impact Combined Processing to these.Ion injects can fill up fine crack, in injection process, can introduce a large amount of solute atoms and room, forms various dislocations; And precipitating metal compound or various alloy phase, make material reinforcement, improve abrasion resistant qualities; High temperature oxidation resistance improves fatigue resistance or the control modified layer makes its malleableize; Its laser-impact is handled, under the high pressure effect of laser blast wave, the microplasticity distortion takes place in the metal surface, forms amplitude residual compressive stress layer again, thus mechanical performance, the especially fatigue life of having improved metal material effectively.
Summary of the invention
The purpose of this invention is to provide a kind of surface has the pelletizing of fine crack to smelt the reproducing method of producing the equipment key component.
A kind of surface has the pelletizing of fine crack to smelt the reproducing method of producing the equipment key component, it is characterized in that:
(1) the present invention carries out surperficial Non-Destructive Testing at pelletizing smelting production equipment key component material processed position before and after making again; The Non-Destructive Testing sensor is through the method test material surface signal of error separating; Comprise the various blemish information such as roughness, hardness, crackle, unevenness of workpiece in the signal, can accurately locate the Combined Processing position like this.
(2) part carefully cleans with acetone and absolute alcohol behind grinding and polishing and deoils; On comprehensive ion implantation apparatus, carrying out ion injects; Comprehensive implanter has been eliminated common beamline ion implanters injection can only be along the limitation of a direction injection, and processing cost is lower.Injecting ion should select (see figure 3) according to the working environment of damage component, and target chamber system vacuum degree maintains 10 during injection
-3～10
-5Between the Pa, the water flowing cooling, energy is at 30～200keV, and beam current density is 6～30 μ A/cm
2, implantation dosage is 10
15～10
18Ions/cm
2, maximum temperature is no more than 200 ℃ during injection, and implantation temperature is directly used thermocouple measurement.
When (3) laser-impact is handled, apply pitch-dark coating at surface of the work earlier, water is cooked protective layer, the fine crack place of component surface is carried out laser-impact handle.In adopting laser impact intensified process, laser output wavelength is 1.054 μ m, and the pulse width (FWHM) of output laser is 20ns; Pulsed laser energy is about 25J; Under the high pressure effect of laser blast wave, the microplasticity distortion takes place in the metal surface, forms amplitude residual compressive stress layer; Thereby make crack closure effectively; Improved the mechanical performance of metal material, can increase substantially fatigue life, the anti-stress corrosion performance of material especially, cleaned and drying with acetone and absolute alcohol after the shock treatment.
(4) in the treatment process of manufacturing again of the inventive method; The fine crack member and the blemish that go out to surperficial Non-Destructive Testing; The Combined Processing that is directed against is arranged in the subrange; Rather than large tracts of land whole part Combined Processing, and in processing procedure, select the composition of ion injection and the energy parameter of laser-impact according to workpiece Service Environment and condition.Therefore can effectively economize on resources and the energy, significantly reduce production costs.
The present invention has fully combined the characteristics of ion implantation technology and laser-impact technology, and ion implantation technology can be controlled under low temperature or the room temperature carries out, can the original dimensional accuracy of retaining member and surface roughness, do not influence the overall performance of pending material; And to lack (20ns) strain rate especially high by (10 the time in the laser-impact process
7s
-1), be high strain rate cold plasticity enhanced deformation technology, be specially adapted to the fatiguability region of fracture of workpiece, particularly the region of stress concentration surface reinforcement modifying combines the two, and it is modified and reinforced to carry out comprehensive comprehensive surface to metal material.
The innovation of reproducing method of the present invention the most important thing is that pelletizing is smelted the oxide that key component matrix top layer forms a kind of densification through after making again; Can effectively improve high-temperature oxidation resistance, produce the high-amplitude residual compressive stress simultaneously, and this residual compressive stress can make crack closure effectively; Move after can making initial crack stablize extension phase; And can improve tired expansion threshold stress intensity factor, reach the purpose that improves fatigue life, and rationally estimate making the back component fatigue life-span again.Through PREDICTION OF FATIGUE LIFE before and after member is made again, can predict that like this member is on active service the amount of returning and the time of cost thereof after stopping, produce maximum economy and ecological benefits.This is the maximum characteristics of the inventive method.
Advantage of the present invention is following:
(1) its life-span was reliably after this method was made again, was enough to keep next life cycle.Can effectively manage for Life cycle design, maintenance and the length of service of equipment like this, the more important thing is can energy savings with preserve the ecological environment, for quickening constructing economical society, realize that economic sustainable development is significant.
(2) owing to kind, dosage, the energy of making intermediate ion injection element again all can accurately be controlled; This method can satisfy the multiple performance requirement of workpiece: this processing method of making again can not only make pelletizing smelt the fine crack closure on production equipment key components and parts surface; And can strengthen modification to the top layer handles; And be applicable to that smelting production in pelletizing equips other structural member; Improve workpiece wearability, antifriction quality, high temperature oxidation resistance and corrosion resistance, so improve greatly the fatigue life of workpiece.
(3) this reproducing method is applicable to surperficial irregular component, thin part, aperture, groove and macrostructure spare part is handled, and the distortion of making the material treated surface again is very little, does not influence material heart portion performance.And workpiece is indeformable basically after handling, outward appearance is even, surface roughness good, can be used as part and finally handles.
(4) this reproducing method feature of environmental protection is excellent, has no secondary pollution.
Description of drawings
The reproducing method flow chart of Fig. 1 high-temperature fatigue damage component
The manufacturing process flow diagram again of Fig. 2 high-temperature fatigue damage component.
Fig. 3 injects the mechanical property that the different ions element improves metal material
The specific embodiment
This method technological process is as shown in Figure 2, and concrete steps are: the first step, confirm the fault parts, and it is carried out Non-Destructive Testing, surperficial fine crack (or damage) and fault location are positioned; In second step,, carefully clean with acetone and absolute alcohol behind the grinding and polishing and deoil for meeting again the parts of making; In the 3rd step, on comprehensive ion implantation apparatus, carry out ion and inject.Injecting ion should select (see figure 3) according to the working environment of damage component, and present embodiment ion injection parameter is: the injection ion is N
+, target chamber system vacuum degree is 5 * 10 during injection
-4Pa, the water flowing cooling, energy is 80keV, beam current density is 8 μ A/cm
2, implantation dosage is 2 * 10
17Ions/cm
2, maximum temperature is no more than 200 ℃ during injection, and implantation temperature is directly used thermocouple measurement.The ion implantation technology process is: go into stove one and vacuumize a heating one ion and inject a cooling one and come out of the stove; In the 4th step, ion carries out laser impact intensified processing after injecting, in adopting laser impact intensified process; Laser output wavelength is 1.054 μ m; The pulse width (FWHM) of output laser is 20ns, and pulsed laser energy is about 25J, after pulse laser focuses on through optical mirror slip; Hot spot converges in the part injury position, cleans and drying with acetone and absolute alcohol after the shock treatment; In the 5th step, repair member is detected, assesses and estimates its remanent fatigue life.Pelletizing is smelted the little axle of equipment high-temperature damage parts 12CrMoV and is made the back life-span again and prolong greatly, detects its mechanics of surface performance, and with handle before contrast, heat-resisting parts average life span was brought up to more than 4 years by 1.5 years, thereby had greatly improved fatigue life.Result of study shows; Part hardness significantly improves behind this remediation intensification; Its surface becomes compressive stress state by residual stress state by tension; The highest hardness increase rate is up to 3 times, thus performances such as its fatigue life and wearability significantly improve, to smelt equipment key components and parts performance significant to improving pelletizing for this.
Claims (3)
1. the reproducing method of a high-temperature fatigue damage component is characterized in that: the reproducing method of described high-temperature fatigue damage component is that ion injects the effective Combined Processing with laser-impact; Earlier to cleaning behind the high-temperature fatigue damage component grinding and polishing and deoiling; Carry out ion then and inject, on comprehensive ion implantation apparatus, carry out ion and inject, temperature should be controlled at and not cause under the crack deformation temperature, and it is selected according to the working environment of each parts of pelletizing smelting production equipment to inject element; Carry out laser-impact again and handle, apply pitch-dark coating at surface of the work earlier, water is cooked protective layer, the fine crack place of component surface is carried out laser-impact handle; At last repair member is detected, assesses and estimate its remanent fatigue life.
2. the reproducing method of a kind of high-temperature fatigue damage component according to claim 1; It is characterized in that: before making again; Confirm pelletizing smelting production equipment key component face crack situation according to Non-Destructive Testing earlier; It is screened, make for meeting the parts of making again again, the parts after making again detect and the remanent fatigue life assessment; Meeting its interpretational criteria of parts of making does again, its degree of depth of the fine crack of component surface can not surpass pelletizing smelts and produce 5% of equipment parts thickness, and width injects with ion to be filled up crackle fully and be advisable.
3. the reproducing method of a kind of high-temperature fatigue damage component according to claim 1 and 2 is characterized in that: when said ion injected, target chamber system vacuum degree maintained 10
-3～10
-5Between the Pa, the water flowing cooling, energy is at 30～200keV, and beam current density is 6～30 μ A/cm
2, implantation dosage is 10
15～10
18Ions/cm
2, maximum temperature is no more than 200 ℃ during injection, and implantation temperature is directly used thermocouple measurement.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009101843051A CN101633109B (en) | 2009-08-12 | 2009-08-12 | Method for reproducing high-temperature fatigue damage component |
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| CN2009101843051A CN101633109B (en) | 2009-08-12 | 2009-08-12 | Method for reproducing high-temperature fatigue damage component |
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| CN101633109B true CN101633109B (en) | 2012-04-04 |
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Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN102323388B (en) * | 2011-05-18 | 2013-12-18 | 河北钢铁股份有限公司邯郸分公司 | Judging method for causing reason of straight crack at edge of rolling plate |
| CN104451662A (en) * | 2014-11-21 | 2015-03-25 | 南京机电职业技术学院 | Combined treatment method for crack repair and strengthening of part in high-temperature working environment |
| CN106637123A (en) * | 2016-12-22 | 2017-05-10 | 当涂县宏宇金属炉料有限责任公司 | Stainless steel surface treatment technology based on ion injection |
| CN111185727B (en) * | 2020-01-16 | 2022-07-05 | 郑州煤机综机设备有限公司 | Guide sleeve remanufacturing method |
| CN113186526B (en) * | 2021-04-30 | 2022-07-19 | 广东省科学院新材料研究所 | Metal coating and preparation method thereof |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP4103803B2 (en) * | 2004-01-15 | 2008-06-18 | セイコーエプソン株式会社 | Optical apparatus and projector |
| CN101412176A (en) * | 2008-11-20 | 2009-04-22 | 江苏大学 | Laser impact refabrication method for metallic structural parts containing fine crack |
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2009
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Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP4103803B2 (en) * | 2004-01-15 | 2008-06-18 | セイコーエプソン株式会社 | Optical apparatus and projector |
| CN101412176A (en) * | 2008-11-20 | 2009-04-22 | 江苏大学 | Laser impact refabrication method for metallic structural parts containing fine crack |
Non-Patent Citations (2)
| Title |
|---|
| 唐通鸣等.提高金属材料疲劳寿命的新技术.《电加工》.1999,(第1期),34-36. * |
| 陈曦等.提高金属材料疲劳性能的强化技术.《上海金属》.2008,第30卷(第1期),20-23. * |
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Granted publication date: 20120404 Termination date: 20120812 |