CN103668036B - The laser cladding repair technique of the valve seat that hardness is high and deflection is little - Google Patents
The laser cladding repair technique of the valve seat that hardness is high and deflection is little Download PDFInfo
- Publication number
- CN103668036B CN103668036B CN201310239606.6A CN201310239606A CN103668036B CN 103668036 B CN103668036 B CN 103668036B CN 201310239606 A CN201310239606 A CN 201310239606A CN 103668036 B CN103668036 B CN 103668036B
- Authority
- CN
- China
- Prior art keywords
- valve seat
- laser
- detect
- valve
- base surface
- 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.)
- Active
Links
Abstract
The laser repairing process that the present invention relates to a kind of valve seat, comprises the following steps: A. processes valve base surface, and valve seat is carried out to failure analysis; B. according to the failure analysis result of valve seat, Optimizing Process Parameters, carries out laser melting coating; The component of the alloy powder adopting and weight percent content are C:0.5% to 1%, Cr:19% to 23%, and B:1.5% to 2%, Si:1% to 3%, Mo:0.05% to 0.5%, Mn:0.05% to 0.5%, W:7% to 9%, Ni:2.5% to 4%, all the other are Co; C. detect. The laser repairing process of this valve seat carries out laser melting coating to valve base surface, makes its size restoration to instructions for use, and corrosion resistance and the wearability of reparation rear valve base all exceed original performance.
Description
The application is divisional application, the application number of original application: 201210351281.6, and the applying date: 2012-09-20, invention and created name " laser cladding repair technique of valve seat ".
Technical field
The present invention relates to a kind of laser cladding method, especially a kind of laser melting coating restorative procedure of valve seat.
Background technology
The valve seat using in petroleum chemical industry, due to its operating characteristic, requires higher to anti-corrosion, wearability. At present, the equipment great majority of domestic petrochemical enterprise are import equipments, will drop into very large cost and go abroad and order goods or maintenance when wearing and tearing, burn into when vaporization appears in valve seat, have increased burden economically to enterprise.
Laser melting coating refers to that place selecteed coating material with different adding material modes on by cladding matrix surface makes it to melt with matrix surface skim through laser irradiation simultaneously, and it is extremely low after rapid solidification, to form dilution factor, become the face coat of metallurgical binding with matrix, significantly improve the process of wear-resisting, anti-corrosion, heat-resisting, the anti-oxidant and electrical characteristic of substrate surface, thereby reach the object 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 matrix is combined, be applicable to that cladding material is many, granularity and the feature such as content is large.
Owing to repairing the valve seat of petroleum chemical industry, the wettability to cladding layer, wearability, corrosion resistance all require high, so how laser melting and coating technique is effectively applied to valve seat reparation, are the problems that those skilled in the art need to solve.
Summary of the invention
The technical problem to be solved in the present invention is to provide a kind of carries out laser melting coating to valve base surface, makes its size restoration to instructions for use, and corrosion resistance after repairing and wearability all exceed the laser cladding repair technique of the valve seat of original performance.
In order to solve the problems of the technologies described above, the invention provides a kind of laser repairing process of valve seat, comprise the following steps:
A. valve base surface is processed, valve seat is carried out to failure analysis;
B. according to the failure analysis result of valve seat, Optimizing Process Parameters, carries out laser melting coating;
Adopt the mode of preset powder feeding, taking fast-transverse-flow CO2 laser as light source, valve seat is carried out to lap connection scanning, laser power is 1700W to 2100W, absolute altitude is 260mm to 275mm, spot size is 10mm × 1.8mm, sweep speed is 110mm/min to 130mm/min, and amount of lap is 6.5mm, and powder sending quantity is 10g/min to 15g/min; The component of the alloy powder adopting and weight percent content are C:0.5% to 1%, Cr:19% to 23%, and B:1.5% to 2%, Si:1% to 3%, Mo:0.05% to 0.5%, Mn:0.05% to 0.5%, W:7% to 9%, Ni:2.5% to 4%, all the other are Co;
As the embodiment of optimizing, adopt the mode of preset powder feeding, taking fast-transverse-flow CO2 laser as light source, valve seat is carried out to lap connection scanning, laser power is 1900W, absolute altitude is 270mm, and spot size is 10mm × 1.8mm, and sweep speed is 120mm/min, amount of lap is 6.5mm, and powder sending quantity is 12g/min; The component of the alloy powder adopting and weight percent content are C:1%, Cr:21%, and B:2%, Si:2%, Mo:0.2%, Mn:0.2%, W:8%, Ni:3%, all the other are Co;
C. detect.
For valve seat to be repaired is repaired successfully in the process of laser melting coating, and obtain better repairing effect, a kind of preferred technical scheme is: above-mentioned steps A removes the dust on valve seat, greasy dirt, corrosion; Detect the size at the each position of valve seat, determine failure site and wear extent thereof, determine valve seat deflection; Remove the fatigue layer 0.5mm to 2mm of valve seat failure site, and clean.
In order to ensure the quality of the valve seat after reparation, a kind of preferred technical scheme is: above-mentioned steps C detects valve base surface hardness; Detect valve seat deflection; Valve base surface is carried out to machining; Detect a flaw, verification.
Technique scheme of the present invention has the following advantages compared to existing technology:
(1) in the laser repairing process of valve seat of the present invention, adopt homemade Co-based alloy powder, in the composition of alloy powder, by the strict content of controlling C, make it have good wetability, in cladding process, crack and pore preventing; In alloy powder, by adding appropriate B, Si, alloy is formed taking austenite as main matrix after solidifying simultaneously, to meet its hardness requirement, and make alloy powder there is good self-fluxing nature; Appropriate Cr, Mo, Mn, W, Ni element have carried out alloy strengthening to cobalt-base alloys in addition, do not affecting under the prerequisite of weldability, can make valve seat corrosion resistance and wearability after repairing greatly improve, and hardness can reach 50HRC to 55HRC and meet instructions for use.
(2) laser repairing process of valve seat of the present invention adopts broad band laser bundle, and efficiency is higher; Adopt the mode of preset powder feeding, strictly control powder sending quantity, and laser power, sweep speed, amount of lap etc. are optimized, make the structural homogenity of cladding layer good, thickness and hardness even. This technique make the fusion rate of matrix of cladding layer and valve seat failure site high, in conjunction with closely, valve seat deflection is little, valve base surface does not have crackle and pore, hardness is high, has fabulous wearability.
(3) laser repairing process of valve seat of the present invention is because adopted alloy powder weldability is good, and the technological parameter of laser melting coating is optimized, laser melting coating is before without preheating, laser melting coating is afterwards without being incubated, more without annealing, ensureing that under the prerequisite of repairing quality, technological process is relatively succinct.
Detailed description of the invention
The concrete steps of the laser repairing process of the valve seat of the present embodiment are as follows:
A. valve base surface to be repaired is processed, valve seat is carried out to failure analysis.
By removings such as the dust on valve seat, greasy dirt, corrosions; Detect the size at the each position of valve seat, determine failure site and wear extent thereof, whether inspection valve seat has metaboly; Remove the fatigue layer 0.5mm of valve seat failure site by polishing, and clean.
B. according to the failure analysis result of valve seat, Optimizing Process Parameters, carries out laser melting coating.
Adopt the mode of preset powder feeding, lap connection scanning is carried out at position to be repaired taking fast-transverse-flow CO2 laser as light source to valve seat, laser power is 1900W, absolute altitude (is that laser instrument is from the distance between agent, absolute altitude=focal length+defocusing amount) be 270mm, spot size is 10mm × 1.8mm, sweep speed is 120mm/min, amount of lap is 6.5mm, and powder sending quantity is 12g/min. The component of the alloy powder adopting and weight percent content are C:1%, Cr:21%, and B:2%, Si:2%, Mo:0.2%, Mn:0.2%, W:8%, Ni:3%, all the other are Co.
C., after reparation finishes, detect.
Detect case hardness; Detect deflection; Valve base surface is carried out to machining; Detect a flaw, detect and whether have pore, slag inclusion, slight crack etc. to affect the defect of valve seat mechanical performance; Carry out verification, whether quality inspection is qualified.
Obviously, above-described embodiment is only for example of the present invention is clearly described, 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 giving exhaustive to all embodiments. And these belong to apparent variation that spirit of the present invention extended out or variation still among protection scope of the present invention.
Claims (3)
1. a laser repairing process for valve seat, is characterized in that, comprises the following steps:
A. valve base surface is processed, valve seat is carried out to failure analysis;
B. according to the failure analysis result of valve seat, Optimizing Process Parameters, carries out laser melting coating;
Adopt the mode of preset powder feeding, taking fast-transverse-flow CO2 laser as light source, valve seat is carried out to lap connection scanning, laser power is 1900W, absolute altitude is 270mm, and spot size is 10mm × 1.8mm, and sweep speed is 120mm/min, amount of lap is 6.5mm, and powder sending quantity is 12g/min; The component of the alloy powder adopting and weight percent content are C:1%, Cr:21%, and B:2%, Si:2%, Mo:0.2%, Mn:0.2%, W:8%, Ni:3%, all the other are Co;
C. detect.
2. according to the laser repairing process of valve seat claimed in claim 1, it is characterized in that: described steps A is that the dust on valve seat, greasy dirt, corrosion are removed; Detect the size at the each position of valve seat, determine failure site and wear extent thereof, determine valve seat deflection; Remove the fatigue layer 0.5mm to 2mm of valve seat failure site, and clean.
3. according to the laser repairing process of valve seat claimed in claim 1, it is characterized in that: described step C detects valve base surface hardness; Detect valve seat deflection; Valve base surface is carried out to machining; Detect a flaw, verification.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310239606.6A CN103668036B (en) | 2012-09-20 | 2012-09-20 | The laser cladding repair technique of the valve seat that hardness is high and deflection is little |
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012103512816A CN102828140A (en) | 2012-09-20 | 2012-09-20 | Laser cladding repair process for valve seat |
| CN201310239606.6A CN103668036B (en) | 2012-09-20 | 2012-09-20 | The laser cladding repair technique of the valve seat that hardness is high and deflection is little |
Related Parent Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2012103512816A Division CN102828140A (en) | 2012-09-20 | 2012-09-20 | Laser cladding repair process for valve seat |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN103668036A CN103668036A (en) | 2014-03-26 |
| CN103668036B true CN103668036B (en) | 2016-05-25 |
Family
ID=47331444
Family Applications (2)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201310239606.6A Active CN103668036B (en) | 2012-09-20 | 2012-09-20 | The laser cladding repair technique of the valve seat that hardness is high and deflection is little |
| CN2012103512816A Pending CN102828140A (en) | 2012-09-20 | 2012-09-20 | Laser cladding repair process for valve seat |
Family Applications After (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2012103512816A Pending CN102828140A (en) | 2012-09-20 | 2012-09-20 | Laser cladding repair process for valve seat |
Country Status (1)
| Country | Link |
|---|---|
| CN (2) | CN103668036B (en) |
Families Citing this family (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104018892B (en) * | 2014-05-28 | 2015-10-28 | 中广核核电运营有限公司 | The restorative procedure of turbine high-pressure steam valve valve bonnet seal face pit |
| CN104874793A (en) * | 2015-05-27 | 2015-09-02 | 机械科学研究总院先进制造技术研究中心 | Three-dimensional printing direct manufacturing method of engine cylinder head valve seat |
| JP2018039037A (en) * | 2016-09-08 | 2018-03-15 | トヨタ自動車株式会社 | Cobalt-base build-up alloy for engine valve and engine |
| CN108085648A (en) * | 2017-12-07 | 2018-05-29 | 中国石油天然气股份有限公司 | A kind of water-flooding pump for oil field failure combination valve repairing and reusing method |
| CN108165982A (en) * | 2017-12-22 | 2018-06-15 | 北京机科国创轻量化科学研究院有限公司 | A kind of method that superelevation rate laser melting coating prepares nickel-base antiwear anti-corrosion coating |
| CN108422150A (en) * | 2018-04-23 | 2018-08-21 | 广汉川油井控装备有限公司 | A kind of restorative procedure of cock valve core and plug valve |
| CN110424009A (en) * | 2019-08-28 | 2019-11-08 | 燕山大学 | A method of strengthening PTA ball seat using laser cladding |
| CN113621853A (en) * | 2021-08-18 | 2021-11-09 | 沈阳大陆激光先进制造技术创新有限公司 | Alloy material for laser manufacturing and remanufacturing of minimum flow valve core of power plant and preparation method thereof |
| CN114959684A (en) * | 2022-05-18 | 2022-08-30 | 广东核电合营有限公司 | Method for repairing sealing surface of main valve seat of valve |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101787529A (en) * | 2010-03-18 | 2010-07-28 | 安徽米特吉激光科技有限公司 | Laser restoring method of aircraft engine cylinder body |
| CN101974751A (en) * | 2010-07-06 | 2011-02-16 | 山东建能大族激光再制造技术有限公司 | Method for repairing speed reduction gearbox hole |
| 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 |
| CN102220522A (en) * | 2011-06-02 | 2011-10-19 | 沈阳大陆激光技术有限公司 | Cobalt-based alloy powder for laser remanufacturing of housing of rolling mill |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6884964B2 (en) * | 2003-01-09 | 2005-04-26 | General Electric Company | Method of weld repairing a component and component repaired thereby |
-
2012
- 2012-09-20 CN CN201310239606.6A patent/CN103668036B/en active Active
- 2012-09-20 CN CN2012103512816A patent/CN102828140A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101787529A (en) * | 2010-03-18 | 2010-07-28 | 安徽米特吉激光科技有限公司 | Laser restoring method of aircraft engine cylinder body |
| CN101974751A (en) * | 2010-07-06 | 2011-02-16 | 山东建能大族激光再制造技术有限公司 | Method for repairing speed reduction gearbox hole |
| 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 |
| CN102220522A (en) * | 2011-06-02 | 2011-10-19 | 沈阳大陆激光技术有限公司 | Cobalt-based alloy powder for laser remanufacturing of housing of rolling mill |
Also Published As
| Publication number | Publication date |
|---|---|
| CN102828140A (en) | 2012-12-19 |
| CN103668036A (en) | 2014-03-26 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN103668036B (en) | The laser cladding repair technique of the valve seat that hardness is high and deflection is little | |
| CN103668176B (en) | Be beneficial to the laser cladding repair technique of the gear improving hardness and wear resistance | |
| CN103668175B (en) | Be beneficial to the laser cladding repair technique of the thin-wall sleeve reducing built-up welding static stress and distortion | |
| US8828312B2 (en) | Dilution control in hardfacing severe service components | |
| CN102677049A (en) | Laser restoring process for surface of high carbon alloy roller | |
| CN103231155B (en) | Easy-welding high-strength large-thickness steel plate preheating-free gas shielded welding process | |
| Rajeev et al. | Al-Si-Mn alloy coating on aluminum substrate using cold metal transfer (CMT) welding technique | |
| Park et al. | A study on process development of super-TIG welding for 9% nickel steel with Alloy 625 | |
| CN103451650A (en) | Laser quick repair process method for large rotary machine bearing bush | |
| CN102732831A (en) | Laser repairing process for automobile mold | |
| CN103343338A (en) | Laser restoration method of flaring die | |
| US20130220523A1 (en) | Coating compositions, applications thereof, and methods of forming | |
| CN102828181A (en) | Laser cladding repair process for cross shafts | |
| CN102677048A (en) | Laser repairing technology for high-speed motor rotor | |
| CN112877569A (en) | Nickel-based alloy powder for laser cladding and laser cladding method | |
| CN104400252A (en) | Flux-cored wire | |
| CN108015424A (en) | A kind of compound reproducing method of laser-electric arc that cylinder ironcasting is held for TRT | |
| Keyhany et al. | Repair of structural steel surface groove by using flame welding method by spraying pure iron powder | |
| CN106567063A (en) | A hot roller laser restoration method allowing surface hardness after restoration to be 58 HRC or above | |
| CN106567065A (en) | Laser repairing method for allowing roller surface of hot roller to have good thermal hardness after repairing | |
| CN106567069A (en) | Laser repairing method of hot roll good in laser cladding effect | |
| CN106567071A (en) | Low roller deformation hot roller laser repair method | |
| CN103343339A (en) | Laser restoration method for drawing die | |
| Sitthipong et al. | Investigation of Microstructure and Hardness Properties of Hardfacing Surface on SCM 440 Alloy Steel by Using Metal Active Gas and Flux Cored Arc Welding Processes | |
| Hussein et al. | Preliminary study of on cladding process on grey cast iron substrate |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| TR01 | Transfer of patent right | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20221206 Address after: 276000 Middle section of Yanbin Road, Biomedical Industrial Park, Feixian Economic Development Zone, Linyi City, Shandong Province Patentee after: Kangquan Medical Products (Shandong) Co.,Ltd. Address before: 212000 Yunhe Congyang Village, Lvcheng Town, Danyang City, Zhenjiang City, Jiangsu Province Patentee before: DANYANG HONGTU LASER TECHNOLOGY Co.,Ltd. |
|
| TR01 | Transfer of patent right | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20221220 Address after: Room 210, Floor 2, Intersection Street Building, Xuyou Road and Xingda Road, Tanyi Town, Fei County, Linyi City, Shandong Province 276000 Patentee after: Linyi Talent Digital Technology Group Co.,Ltd. Address before: 276000 Middle section of Yanbin Road, Biomedical Industrial Park, Feixian Economic Development Zone, Linyi City, Shandong Province Patentee before: Kangquan Medical Products (Shandong) Co.,Ltd. |