CN103668181B - The laser repairing process of the automobile die that fusion rate is high - Google Patents
The laser repairing process of the automobile die that fusion rate is high Download PDFInfo
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- CN103668181B CN103668181B CN201310649267.9A CN201310649267A CN103668181B CN 103668181 B CN103668181 B CN 103668181B CN 201310649267 A CN201310649267 A CN 201310649267A CN 103668181 B CN103668181 B CN 103668181B
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Abstract
The present invention relates to the laser repairing process of a kind of automobile die, comprise the following steps: die surface is processed by A., mould is carried out detection and analyzes；B. mould is carried out low-temperature heat；C. analyze result according to the detection of mould, the die cavity at die wear position is programmed, formulate technological parameter, successively the plane position on the edge of mould, mould and the stepped portions on mould are carried out laser melting coating；The component of the alloy powder adopted and weight percent content are C≤0.1%, Cr:10% to 13%, B:1.5% to 2.5%, Si:1% to 2%, Mo:0.5% to 1.2%, Mn:8% to 12%, W:6% to 12%, TiO2: 5% to 15%, all the other are Fe；D. detect.Die wear position is carried out laser melting coating by the laser repairing process of this automobile die so that it is the size of case hardness and abrading section reaches instructions for use.
Description
The application is divisional application, the application number of original application: 201210248963.4, the applying date: 2012-07-18, invention and created name " laser repairing process of automobile die ".
Technical field
The present invention relates to a kind of laser cladding method, the laser melting coating restorative procedure of especially a kind of die surface.
Background technology
Automobile die is the general name of the mould of punching body of a motor car stamping parts, for instance: top cover flange die, crossbeam strengthen plate pressure-shaped mould etc., and automobile die plays very important effect in automobile industry.In recent years, along with developing rapidly of domestic automobile process industry, the Die Manufacturing Enterprise development of China is very rapid, has made significant headway, but compared with Foreign Automobile Making mold advanced level, has still suffered from obvious gap.Owing to automobile die manufacture requires and requirement in product quality is more and more higher in technology, require that under the strong competition of stricter overseas-funded enterprise, the pressure that domestic automobile die manufacturing industry is encountered also grows with each passing day in technology.At present, the mortal wound that mould and die accuracy is poor, the life-span is short, construction cycle length is domestic automobile mould.There is the situation of mistake processing in manufacturing process in domestic automobile mould, in use can produce abrasion in various degree, and the scrappage of mould, up to 30%, causes huge waste, causes that domestic automobile mould commercially competitiveness is not enough.Quality is exactly the life of enterprise, and the quality of mould is directly connected to the counterweight of competition among enterprises.For this situation, current most enterprises adopts common built-up welding to process and automobile die is repaired, but it is mostly high-carbon alloy steel or cast steel due to mold materials, common built-up welding can bring the shortcomings such as deflection is big, hardness is not enough, easy to crack to mould, have a strong impact on mold use precision, cause the product quality produced to decline.
Laser melting coating refers to is being placed selected coating material through laser irradiation so as to melt with matrix surface a thin layer simultaneously with different adding material modes on cladding matrix surface, and it is extremely low to form dilution factor after rapid solidification, the face coat of metallurgical binding is become with matrix, significantly improve wear-resisting, anti-corrosion, heat-resisting, the antioxidation of substrate surface and the process of electrical characteristic, thus reaching the purpose of surface modification or reparation.With built-up welding, spraying, plating and gas phase sedimentary facies ratio, laser melting coating has that dilution factor is little, dense structure, coating and body junction gets togather, many, the granularity that is suitable for cladding material and the feature such as changes of contents is big.How laser melting and coating technique is effectively applied to automobile die reparation, be those skilled in the art need solve problem.
Summary of the invention
The technical problem to be solved in the present invention is to provide one and die surface is carried out laser melting coating so that it is the size of case hardness and abrading section reaches the laser repairing process of the automobile die of instructions for use.
In order to solve above-mentioned technical problem, the invention provides the laser repairing process of a kind of automobile die, it is characterised in that comprise the following steps:
A. die surface is processed, mould is carried out detection and analyzes；
B. mould is carried out low-temperature heat, removes steam and the oil gas on die matrix surface；
C. result is analyzed according to the detection of mould, the die cavity at die wear position is programmed, formulate technological parameter, successively the plane position on the edge of mould, mould and the stepped portions on mould are carried out laser melting coating, in laser cladding process, mould is carried out vibration stress relief treatment；
D. detect.
So that cladding layer has higher hardness and wearability, and welding performance is better, a kind of preferred technical scheme is: the component of the alloy powder adopted in above-mentioned steps C and weight percent content are C≤0.1%, Cr:10% to 13%, B:1.5% to 2.5%, Si:1% to 2%, Mo:0.5% to 1.2%, Mn:8% to 12%, W:6% to 12%, TiO2: 5% to 15%, all the other are Fe.The alloy powder that this laser repairing process adopts strictly controls the content of C so that it is be not more than 0.1%, is conducive to improving the wettability of cladding layer, it is prevented that crack in cladding process and pore；Alloy powder makes alloy form the matrix based on austenite after solidification by appropriate B, the Si of interpolation simultaneously, utilize appropriate Cr, Mo element that ferrous alloy is carried out basic alloy strengthening, additionally also added appropriate Mn, W, TiO2Ferrous alloy is carried out further alloy strengthening, even if C content is relatively low, the hardness of cladding layer also can reach more than 55HRC, fully meets the hardness requirement that mould uses, and has significantly high wearability.
In order to ensure the performance of cladding layer, better eliminating built-up welding stress, a kind of preferred technical scheme is: adopts the mode of preset powder feeding in above-mentioned steps C, for light source, mould is carried out lap connection scanning with fast-transverse-flow CO2 laser；Laser power is 1500W to 1900W, and absolute altitude is 260mm to 275mm, and spot size is 10mm × 1.8mm, and scanning speed is 110mm/min to 140mm/min, and amount of lap is 6.5mm, and powder sending quantity is 12g/min to 18g/min.This laser repairing process adopts broad band laser bundle, in hgher efficiency；Adopt the mode of preset powder feeding, strictly control powder sending quantity, and laser power, scanning speed, amount of lap etc. are optimized so that die deformation amount is little, the fusion rate of the matrix at cladding layer and die wear position is high, be tightly combined, the structural homogenity of cladding layer is good, thickness and hardness uniform.
In order to better remove steam and the oil gas of automobile die matrix surface, a kind of preferred technical scheme is: the heating-up temperature in above-mentioned steps B is 80 DEG C to 150 DEG C.
So that automobile die to be repaired is repaired successfully in the process of laser melting coating, and obtaining better repairing effect, a kind of preferred technical scheme is: the dust on mould, greasy dirt, corrosion are removed by above-mentioned steps A；Record the original use condition of mould, hardness and mechanical property parameters；The size at the detection each position of mould, it is determined that abrading section and wear extent thereof；Remove the right angle of abrading section, remove the fatigue layer of abrading section, and be carried out.
In order to ensure the quality of the automobile die after repairing, a kind of preferred technical scheme is: above-mentioned steps D is detection die surface hardness；Detection die deformation amount；Die surface is carried out machining；Carry out penetrant inspection, verification.
The technique scheme of the present invention has the advantage that in the laser repairing process of the automobile die of the present invention compared to existing technology need not overall or local heating before mould laser melting coating and in laser cladding process.This technique has only to before laser melting coating to carry out low-temperature heat in order to remove steam and the oil gas on die matrix surface；Then, avoid heat to concentrate by the laser melting coating order at first corner, back plane, then step right angle and produce thermal stress；Stress in laser cladding process, when being welded by vibration aging on eliminating.This technique, without preheating and the mechanical property without influence on mould of annealing, will not make mould be deformed, be conducive to improving further hardness and the wearability of mould.
Detailed description of the invention
(embodiment 1)
Specifically comprising the following steps that of the laser repairing process of the automobile die of the present embodiment
A. die surface to be repaired is processed, mould is carried out detection and analyzes.
Upper dust, greasy dirt, corrosion etc. are removed；Record the original use condition of mould, hardness and mechanical property parameters；The size at the detection each position of mould, it is determined that abrading section and wear extent thereof；By the right angle removing abrading section of polishing, remove the fatigue layer of abrading section, and be carried out.
B. mould being carried out low-temperature heat, heating-up temperature is 100 DEG C, in order to remove steam and the oil gas on die matrix surface.
C. result is analyzed according to the detection of mould, the die cavity at die wear position is programmed (numerical control machining simulation system that programming can use Siemens Company), formulate technological parameter, first the edge of mould is carried out laser melting coating, then the plane position on mould is carried out laser melting coating, then the stepped portions on mould is carried out laser melting coating.In laser cladding process, ceaselessly uniformly knock mould alloy cladding layer with copper rod so that mold vibration is thus eliminating welding stress.
Adopt the mode of preset powder feeding, for light source, mould is carried out lap connection scanning with fast-transverse-flow CO2 laser.Laser power is 1700W, and absolute altitude (i.e. laser instrument from the distance between actor, absolute altitude=focal length+defocusing amount) is 270mm, and spot size is 10mm × 1.8mm, and scanning speed is 120mm/min, and amount of lap is 6.5mm, and powder sending quantity is 15g/min.The component of the alloy powder adopted and weight percent content are C:0.08%, Cr:11%, B:2%, Si:1.5%, Mo:1%, Mn:10%, W:8%, TiO2: 10%, all the other are Fe.
D. repair after terminating, detect.
Detection case hardness；Detection deflection；According to the requirement of drawing, die surface is carried out machining；Carry out penetrant inspection, detect whether that pore, slag inclusion, slight crack etc. affect the defect of mould machine performance；Verifying, whether quality inspection is qualified.
The hardness meansigma methods on the automobile die surface after this technique reparation is 57.2HRC, and in all test points, the case hardness of hardness number lowest point is 55.9HRC.
(embodiment 2)
The remainder of the laser repairing process of the automobile die of the present embodiment is identical with embodiment 1, is different in that:
The component of the alloy powder adopted and weight percent content are C:0.08%, Cr:15%, B:1.5%, Si:1%, Mo:0.5%, Mn:8%, W:6%, TiO2: 8%, all the other are Fe.
The hardness meansigma methods on the automobile die surface after this technique reparation is 56.5HRC, and in all test points, the case hardness of hardness number lowest point is 55.2HRC.
(embodiment 3)
The remainder of the laser repairing process of the automobile die of the present embodiment is identical with embodiment 1, is different in that:
The component of the alloy powder adopted and weight percent content are C:0.1%, Cr:13%, B:2.5%, Si:2%, Mo:1.2%, Mn:12%, W:12%, TiO2: 15%, all the other are Fe.
The hardness meansigma methods on the automobile die surface after this technique reparation is 57.8HRC, and in all test points, the case hardness of hardness number lowest point is 56.3HRC.
Obviously, above-described embodiment is only for clearly demonstrating example of the present invention, and is not the restriction to embodiments of the present invention.For those of ordinary skill in the field, can also make other changes in different forms on the basis of the above description.Here without also cannot all of embodiment be given exhaustive.And the apparent change that these spirit belonging to the present invention are extended out or variation are still among protection scope of the present invention.
Claims (1)
1. the laser repairing process of an automobile die, it is characterised in that comprise the following steps:
A. die surface is processed, mould is carried out detection and analyzes；
B. mould is carried out low-temperature heat, removes steam and the oil gas on die matrix surface；
C. result is analyzed according to the detection of mould, the die cavity at die wear position is programmed, formulate technological parameter, successively the plane position on the edge of mould, mould and the stepped portions on mould are carried out laser melting coating, in laser cladding process, mould is carried out vibration stress relief treatment；
D. detect；
The component of the alloy powder adopted in described step C and weight percent content are C≤0.1%, Cr:10% to 13%, B:1.5% to 2.5%, Si:1% to 2%, Mo:0.5% to 1.2%, Mn:8% to 12%, W:6% to 12%, TiO2: 5% to 15%, all the other are Fe；
Heating-up temperature in described step B is 80 DEG C to 150 DEG C；
Dust on mould, greasy dirt, corrosion are removed by described step A；Record the original use condition of mould, hardness and mechanical property parameters；The size at the detection each position of mould, it is determined that abrading section and wear extent thereof；Remove the right angle of abrading section, remove the fatigue layer of abrading section, and be carried out.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201310649267.9A CN103668181B (en) | 2012-07-18 | 2012-07-18 | The laser repairing process of the automobile die that fusion rate is high |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201310649267.9A CN103668181B (en) | 2012-07-18 | 2012-07-18 | The laser repairing process of the automobile die that fusion rate is high |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201210248963.4A Division CN102732831B (en) | 2012-07-18 | 2012-07-18 | Laser repairing process for automobile mold |
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| CN103668181A CN103668181A (en) | 2014-03-26 |
| CN103668181B true CN103668181B (en) | 2016-07-13 |
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Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN106695267A (en) * | 2016-11-23 | 2017-05-24 | 江苏雨燕模塑有限公司 | Rapid machining process for automobile die |
| CN107127523A (en) * | 2017-04-13 | 2017-09-05 | 滁州市东华模具制造有限公司 | A kind of restorative procedure of cold stamping die for automobile coverage piece |
| CN110284136B (en) * | 2019-07-31 | 2021-03-30 | 天津玛斯特车身装备技术有限公司 | Laser remanufacturing processing method for automobile stamping die |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101629289A (en) * | 2009-07-22 | 2010-01-20 | 岳阳大陆激光技术有限公司 | Laser anti-corrosion and wear-resistant process for trunnion of movable guide vanes of turbines |
| CN101974747A (en) * | 2010-07-06 | 2011-02-16 | 山东建能大族激光再制造技术有限公司 | Laser cladding method of conical surface of cutting teeth |
| CN101974724A (en) * | 2010-11-24 | 2011-02-16 | 上海交通大学 | Iron-based alloy powder for high strength and toughness laser deposited coating |
| CN102002707A (en) * | 2010-11-25 | 2011-04-06 | 秦皇岛洪川实业有限公司 | Laser repairing method of damaged finishing roller |
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2012
- 2012-07-18 CN CN201310649267.9A patent/CN103668181B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101629289A (en) * | 2009-07-22 | 2010-01-20 | 岳阳大陆激光技术有限公司 | Laser anti-corrosion and wear-resistant process for trunnion of movable guide vanes of turbines |
| CN101974747A (en) * | 2010-07-06 | 2011-02-16 | 山东建能大族激光再制造技术有限公司 | Laser cladding method of conical surface of cutting teeth |
| CN101974724A (en) * | 2010-11-24 | 2011-02-16 | 上海交通大学 | Iron-based alloy powder for high strength and toughness laser deposited coating |
| CN102002707A (en) * | 2010-11-25 | 2011-04-06 | 秦皇岛洪川实业有限公司 | Laser repairing method of damaged finishing roller |
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Effective date of registration: 20160530 Address after: 102500, Beijing, Fangshan District Yanshan sheep ears West business building 310 room Applicant after: Beijing Tinarun Hengyuan Industry and Trade Co., Ltd. Address before: Tang Jiaocun Xinzhuang Town 214200 Jiangsu city of Wuxi province Yixing City, No. 203 Applicant before: Jiang Chao |
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