CN108070740B - Laser repair material for repairing titanium alloy valve core and valve seat - Google Patents
Laser repair material for repairing titanium alloy valve core and valve seat Download PDFInfo
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- CN108070740B CN108070740B CN201711453408.4A CN201711453408A CN108070740B CN 108070740 B CN108070740 B CN 108070740B CN 201711453408 A CN201711453408 A CN 201711453408A CN 108070740 B CN108070740 B CN 108070740B
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- 239000000463 material Substances 0.000 title claims abstract description 42
- 230000008439 repair process Effects 0.000 title claims abstract description 39
- 229910001069 Ti alloy Inorganic materials 0.000 title claims description 20
- 238000000034 method Methods 0.000 claims abstract description 12
- 238000005253 cladding Methods 0.000 claims abstract description 10
- 229910052769 Ytterbium Inorganic materials 0.000 claims abstract description 9
- 229910052720 vanadium Inorganic materials 0.000 claims abstract description 9
- 229910052750 molybdenum Inorganic materials 0.000 claims abstract description 8
- 229910052759 nickel Inorganic materials 0.000 claims abstract description 8
- 229910052718 tin Inorganic materials 0.000 claims abstract description 8
- 229910052799 carbon Inorganic materials 0.000 claims abstract description 7
- 229910052804 chromium Inorganic materials 0.000 claims abstract description 7
- 229910052802 copper Inorganic materials 0.000 claims abstract description 7
- 229910052742 iron Inorganic materials 0.000 claims abstract description 7
- 229910052748 manganese Inorganic materials 0.000 claims abstract description 7
- 239000002994 raw material Substances 0.000 claims abstract description 7
- HYXGAEYDKFCVMU-UHFFFAOYSA-N scandium(III) oxide Inorganic materials O=[Sc]O[Sc]=O HYXGAEYDKFCVMU-UHFFFAOYSA-N 0.000 claims abstract description 7
- 229910052719 titanium Inorganic materials 0.000 claims abstract description 7
- 238000004372 laser cladding Methods 0.000 claims description 24
- 239000000843 powder Substances 0.000 claims description 8
- 239000010936 titanium Substances 0.000 claims description 6
- 230000007797 corrosion Effects 0.000 abstract description 16
- 238000005260 corrosion Methods 0.000 abstract description 16
- 239000000126 substance Substances 0.000 abstract description 8
- 238000004519 manufacturing process Methods 0.000 abstract description 7
- 238000012423 maintenance Methods 0.000 abstract description 6
- 229910052761 rare earth metal Inorganic materials 0.000 abstract description 6
- 229910052746 lanthanum Inorganic materials 0.000 abstract description 4
- 238000010606 normalization Methods 0.000 abstract description 4
- -1 La 0.1-0.3% Inorganic materials 0.000 abstract description 2
- 229910052706 scandium Inorganic materials 0.000 abstract description 2
- 238000001514 detection method Methods 0.000 description 15
- KKEYFWRCBNTPAC-UHFFFAOYSA-N Terephthalic acid Chemical compound OC(=O)C1=CC=C(C(O)=O)C=C1 KKEYFWRCBNTPAC-UHFFFAOYSA-N 0.000 description 7
- 229910000831 Steel Inorganic materials 0.000 description 6
- 238000005516 engineering process Methods 0.000 description 6
- 238000007789 sealing Methods 0.000 description 6
- 239000010959 steel Substances 0.000 description 6
- 239000011159 matrix material Substances 0.000 description 5
- 230000003647 oxidation Effects 0.000 description 5
- 238000007254 oxidation reaction Methods 0.000 description 5
- 229910045601 alloy Inorganic materials 0.000 description 4
- 239000000956 alloy Substances 0.000 description 4
- 238000013461 design Methods 0.000 description 4
- 230000000052 comparative effect Effects 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 238000005728 strengthening Methods 0.000 description 3
- 239000002253 acid Substances 0.000 description 2
- 238000004140 cleaning Methods 0.000 description 2
- 238000004040 coloring Methods 0.000 description 2
- 230000007547 defect Effects 0.000 description 2
- 239000000835 fiber Substances 0.000 description 2
- 239000002932 luster Substances 0.000 description 2
- 238000012545 processing Methods 0.000 description 2
- 239000000758 substrate Substances 0.000 description 2
- 229920004933 Terylene® Polymers 0.000 description 1
- 238000005299 abrasion Methods 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- 238000004458 analytical method Methods 0.000 description 1
- 239000011248 coating agent Substances 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 239000002131 composite material Substances 0.000 description 1
- 239000013078 crystal Substances 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- POLCUAVZOMRGSN-UHFFFAOYSA-N dipropyl ether Chemical compound CCCOCCC POLCUAVZOMRGSN-UHFFFAOYSA-N 0.000 description 1
- 230000004927 fusion Effects 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 229920000728 polyester Polymers 0.000 description 1
- 239000005020 polyethylene terephthalate Substances 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 150000002910 rare earth metals Chemical class 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C14/00—Alloys based on titanium
-
- 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
- C23C24/103—Coating with metallic material, i.e. metals or metal alloys, optionally comprising hard particles, e.g. oxides, carbides or nitrides
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Mechanical Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Laser Beam Processing (AREA)
- Sliding Valves (AREA)
Abstract
The invention belongs to the field of laser repair materials, and particularly relates to a high-temperature-resistant, corrosion-resistant and pressure-resistant laser repair material with excellent cladding performance, in particular to a laser repair materialRelates to a laser repair material for valve cores and valve seats in the PTA production process in the chemical industry. The raw materials comprise the following components in percentage by weight: al: 8-10%, Sn: 2.5-3%, Mo: 4.5-5%, V: 12-13.5%, Cr: 12-12.5%, Mn: 0.5-1%, Ni: 2.5-4%, Cu: 2.5-3%, Si: 0.15-0.3%, B: 0.01-0.05%, Fe: < 0.2%, C: < 0.1%, H: < 0.05%, N: < 0.04%, O: less than 0.05 percent; adding La, Yb and Sc in addition to the above components2O3、Pr2O3At least three rare earth elements including La 0.1-0.3%, Yb 0.1-0.3%, and Sc2O3:0.1‑0.3%、Pr2O3:0.1-0.3%, Ti: and (4) the balance. The repairing material realizes the repairing of the valve core and the valve seat, the repairing process is simple to operate, strong in adaptability, small in thermal deformation and strong in normalization, the repaired valve core and the repaired valve seat meet the use requirements, and the repairing material has great value in reducing the maintenance cost of the valve core and the valve seat.
Description
Technical Field
The invention belongs to the field of laser repair materials, particularly relates to a high-temperature-resistant, corrosion-resistant and pressure-resistant laser repair material with excellent cladding performance, and particularly relates to a laser repair material for a valve core and a valve seat in a PTA (pure terephthalic acid) production process in the chemical industry.
Background
PTA belongs to a product used in large batch in the chemical industry, downstream polyester fiber, commonly called terylene, is widely applied in production and life in China, and chemical fiber yield is the first in China. However, the valve core and valve seat device in the production of PTA has complex manufacturing process, high production cost and long period, the valve core is of a cylindrical rod structure, the middle of the valve seat is of a hollow structure, the valve core and the valve seat belong to the piston sliding reciprocating motion work, the materials are titanium alloy, the valve core and the valve rod continuously work under the weak acid condition for a long time, the pressure of a working medium is 10-12MPa, the temperature is 200-300 ℃, and the valve core and the valve seat bear the effects of high temperature, corrosion and pressure impact during work, so the valve core and the valve seat are easy to corrode and wear, once the valve core and the valve seat are damaged, the valve core and the valve seat cannot. The main abrasion areas of the valve core assembly are a sealing surface, an adjusting curved surface and a blade guide surface; the main wear areas of the valve seat are the sealing surface and the cylindrical guide surface of the inner cavity. With the increasing development demand of PTA products in China, most valve cores and valve seats operate under overload conditions at present, the damage degree of the valve cores and the valve seats is also increased, more than 80% of the valve cores and the valve seats need to be replaced in the maintenance process, more than thousands of times are replaced every year, and the total replacement cost is about 5 hundred million yuan. However, it is an urgent task to select an appropriate valve element and valve seat repairing material to ensure that the repaired valve element and valve seat have small thermal deformation and strong normalization and the repaired valve element and valve seat have the use requirements.
The laser cladding repair technology is an advanced remanufacturing technology and is rapidly popularized and widely applied in recent years. The laser cladding repair technology utilizes the characteristic of extremely high energy laser beam gathering energy to instantly and completely melt alloy powder which is preset on the surface of a base material or is synchronously and automatically fed with laser and has special physical, chemical or mechanical properties, simultaneously the base material is partially melted to form a new composite material, and the laser beam is rapidly solidified after being scanned to obtain a compact coating which is metallurgically combined with a matrix so as to achieve the purposes of recovering the geometric dimension and strengthening the surface. Therefore, the search for a suitable method for repairing the valve core and the valve seat by laser cladding still needs to be conducted by the skilled person.
Because the valve core and the valve seat are usually made of titanium alloy at home and abroad at present, the finished product cost is high, and the titanium alloy product is made of special materials, the strength and the creep resistance of the valve core and the valve seat are still maintained at the temperature of 500-600 ℃, the valve core and the valve seat have high strength, good corrosion resistance and high heat resistance, the titanium alloy base materials cannot be fused by a common welding method, relevant repairing methods and experiences are not available, the valve core and the valve seat cannot be repaired at home and abroad, the valve core and the valve seat are repaired by adopting a proper repairing material and a laser cladding technology, no precedent is made at home, and relevant reports are not found at foreign countries. Therefore, it is very important to develop a repair material for valve cores and valve seats, which can be repaired by laser using a laser cladding technology.
Disclosure of Invention
In order to solve the problems in the prior art, the invention provides a laser repair material for a titanium alloy valve core and a valve seat, the repair material realizes the repair of the valve core and the valve seat, the repair process is simple to operate, strong in adaptability, small in thermal deformation and strong in normalization, the repaired valve core and the repaired valve seat meet the use requirements, and the laser repair material has great value in reducing the maintenance cost of the valve core and the valve seat.
In order to achieve the purpose, the laser repair material for the titanium alloy valve core and the valve seat comprises the following raw materials in percentage by weight: al: 8-10%, Sn: 2.5-3%, Mo: 4.5-5%, V: 12-13.5%, Cr: 12-12.5%, Mn: 0.5-1%, Ni: 2.5-4%, Cu: 2.5-3%, Si: 0.15-0.3%, B: 0.01-0.05%, Fe: < 0.2%, C: < 0.1%, H: < 0.05%, N: < 0.04%, O: less than 0.05 percent; adding La, Yb and Sc in addition to the above components2O3、Pr2O3At least three rare earth elements including La 0.1-0.3%, Yb 0.1-0.3%, and Sc2O3:0.1-0.3%、Pr2O3:0.1-0.3%, Ti: and (4) the balance.
In order to achieve the purpose, the preparation method of the laser repair material for the titanium alloy valve core and the valve seat specifically comprises the following steps.
The titanium alloy powder provided by the invention is suitable for a gas laser, and the fusion covering technological parameters of the powder material in repairing application are as follows: uniformly mixing the raw materials to obtain a repair material; carrying out laser cladding by adopting a 1-kilowatt gas laser and a full-automatic rotating tool, wherein the laser cladding parameters are as follows: the power is 2000-.
The invention has remarkable effect.
Through long-term theoretical analysis and a large number of tests, the invention discloses a special repair material (the granularity is 80-120 meshes) for laser repair of a valve core and a valve seat, and the repair problem in the prior art can be effectively solved by combining the advanced remanufacturing technology of laser cladding. The high-temperature-resistant, corrosion-resistant and pressure-resistant repairing material for the laser repairing valve core and the valve seat is used for repairing damaged parts of the valve core and the valve seat by adopting a laser cladding method. The repair material improves the overall acid and corrosion resistance by adding more than 10 percent of V element, improves the overall hardness by adding Mo element, and improves the wear resistance and high-temperature oxidation resistance by adding Cr elementThe addition of more than 3 rare earth elements can make the material obtain good plasticity, toughness, wear resistance, heat resistance, oxidation resistance, corrosion resistance and the like, and the Sc2O3Cubic structure of rare earth sesquioxide, Pr2O3The addition of (2) can improve the stability of the product; then adding Al, Sn, Mo, V, Ni and other elements to form titanium alloy powder, thereby having good high temperature resistance, corrosion resistance, pressure resistance and high temperature oxidation resistance; la, Yb, Sc2O3、Pr2O3The addition of rare earth elements can obviously improve the laser repair effect of the invention. The percentage content of each group of elements is strictly controlled, so that the titanium alloy powder obtains excellent use performance, and further, the titanium alloy powder has good corrosion resistance and high-temperature oxidation resistance on the premise of ensuring the hardness, and forms a compact metallurgical bonding layer with the valve core and the valve seat base material, thereby meeting the requirements of laser cladding on repairing the valve core and the valve seat.
According to the invention, the titanium alloy matrix strengthening elements are added, the percentage content of each element is adjusted, the alloy matrix is strengthened by a strengthening means, the quality of a crystal boundary is improved, and the alloy obtains good comprehensive performance. Therefore, the valve core assembly and the valve seat have good high temperature resistance, corrosion resistance and pressure resistance, the process stability and the component uniformity meet the requirement of the laser cladding strength of the valve core assembly and the valve seat. By adding Cr element, the high-temperature oxidation resistance of the alloy powder after laser cladding is improved, the cladding area is ensured not to be continuously oxidized at high temperature under the working conditions of high temperature and high pressure, and the repairing quality of the device is improved. After the valve core and the valve seat are repaired, flaw detection, pressure detection and actual operation detection prove that the corrosion resistance and the pressure resistance of the material meet the use requirements.
Detailed Description
The present invention will be further described with reference to the following specific examples.
Example 1.
And (4) repairing the valve core and the valve seat of the Ningbo chemical plant.
Damage of the valve element and the valve seat: the sealing surface of the valve core and the adjusting curved surface are abraded; the sealing surface of the valve seat and the cylindrical guide surface of the inner cavity are abraded.
Firstly, mechanically cleaning according to the damaged part, exposing the metallic luster of a matrix, and carrying out laser cladding by using the mixed cladding material; carrying out laser cladding by adopting a 5KW gas laser and a full-automatic rotating tool, wherein the laser cladding parameters are as follows: the power is 4600W, the diameter of the light plate is 3mm, the cladding thickness is 0.8mm, and the cladding speed is 8 mm/s.
The components of the repair material are as follows: al: 8.5%, Sn: 2.8%, Mo: 4.5%, V: 12.6%, Cr: 12.3%, Mn: 0.7%, Ni: 3%, Cu: 2.7%, Si: 0.2%, B: 0.015%, Fe: 0.15%, C: 0.05%, H0.02%, N0.02%, O: 0.03%, Yb 0.23%, Sc2O3 0.15%, Pr2O 3: 0.22%, Ti: and (4) the balance.
After laser cladding, mechanically processing and recovering the original design sizes of the valve core and the valve seat to meet the requirements of a drawing; after being qualified by pressure detection and pressurization at 10MPa for 30min, the steel pipe is installed for use, and after the steel pipe is operated for a certain year (1 year), the steel pipe is dismantled for maintenance and detection, and no damage is found; the material is proved to be completely in accordance with the design indexes of high temperature resistance, corrosion resistance and pressure resistance.
The 5KW gas laser and the full-automatic rotary tool adopted in the laser cladding in the technical scheme are professional equipment in the prior industry.
The repair process realizes the repair of the damage of the valve core and the valve seat, has simple operation, strong adaptability, small thermal deformation and strong normalization, ensures that the repaired valve core and the repaired valve seat meet the normal use requirements, and has great value for manufacturing PTA by using the valve core and the valve seat made of titanium alloy in the chemical industry and reducing the maintenance cost.
Example 2.
Repairing the valve core and the valve seat of a certain chemical plant in the Anshan mountain.
Damage conditions of the valve core and the valve seat: the sealing surface of the valve core is abraded; the sealing surface of the valve seat and the cylindrical guide surface of the inner cavity are abraded.
The laser repair material for the titanium alloy valve core and the valve seat comprises the following raw materials in percentage by weight: al: 10%, Sn: 3%, Mo: 4.8%, V: 12.3%, Cr: 12.2%, Mn: 0.6%, Ni: 2.5%, Cu: 2.5% of Si：0.3%、B：0.01%、Fe：0.05%、C： 0.1%、H：0.05%、N：0.02%、O：0.02%、 La: 0.3%、Yb: 0.3%、Sc2O3:0.1%、Pr2O3: 0.1%, Ti: and (4) the balance.
Firstly, mechanically cleaning according to the damaged part, exposing the metallic luster of a matrix, and carrying out laser cladding by using the mixed cladding material; carrying out laser cladding by adopting a 5KW gas laser and a full-automatic rotating tool, wherein the laser cladding parameters are as follows: the power is 4800W, the diameter of the light plate is 4mm, the cladding thickness is 1mm, and the cladding speed is 10 mm/s.
After laser cladding, mechanically processing and recovering the original design sizes of the valve core and the valve seat to meet the requirements of a drawing; after being qualified by pressure detection and pressurization at 10MPa for 30min, the steel pipe is installed for use, and after the steel pipe is operated for a certain year (1 year), the steel pipe is dismantled for maintenance and detection, and no damage is found; the material is proved to be completely in accordance with the design indexes of high temperature resistance, corrosion resistance and pressure resistance.
Comparative example 1。
The titanium alloy valve core and the valve seat are made of the following repair materials: al: 8.5%, Sn: 2.8%, Mo: 4.5%, V: 12.6%, Cr: 12.3%, Mn: 0.7%, Ni: 3%, Cu: 2.7%, Si: 0.2%, B: 0.015%, Fe: 0.15%, C: 0.05%, H0.02%, N0.02%, O: 0.03%, Ti: and (4) the balance.
The repair substrate and the repair method were the same as in example 1.
After repair, detection shows that size detection and coloring nondestructive flaw detection meet the requirements of drawings, flaw detection does not have crack defects but has air holes, and the repaired part has corrosion phenomenon after half a year of use.
Comparative example 2。
The laser repair material for the titanium alloy valve core and the valve seat comprises the following raw materials in percentage by weight: al: 10%, Sn: 3%, Mo: 4.8%, V: 12.3%, Cr: 12.2%, Mn: 0.6%, Ni: 2.5%, Cu: 2.5%, Si: 0.3%, B: 0.01%, Fe: 0.05%, C: 0.1%, H: 0.05%, N: 0.02%, O: 0.02%, La 0.3%, Yb 0.3%, Ti: and (4) the balance.
The repair substrate and the repair method were the same as in example 2.
After repair, detection finds that size detection and coloring nondestructive flaw detection meet the requirements of drawings, flaw detection does not have crack defects, but has a gas hole phenomenon, and the occurrence rate of the gas holes is lower than that of the comparison ratio 1; and the corrosion phenomenon appears at the repaired part after the use for half a year, but the corrosion phenomenon is not obvious in comparative example 1. Therefore, the invention adds more than three rare earth elements on the basis of main metal components.
Claims (1)
1. The laser repair material for the titanium alloy valve core and the valve seat is characterized by comprising the following raw materials in percentage by weight: al: 8.5%, Sn: 2.8%, Mo: 4.5%, V: 12.6%, Cr: 12.3%, Mn: 0.7%, Ni: 3%, Cu: 2.7%, Si: 0.2%, B: 0.015%, Fe: 0.15%, C: 0.05%, H0.02%, N0.02%, O: 0.03%, Yb 0.23%, Sc2O3:0.15%、 Pr2O3: 0.22%, Ti: the balance;
the process method for carrying out laser cladding on the laser repair materials of the titanium alloy valve core and the valve seat comprises the following steps: after the raw materials are uniformly mixed, the parameters of the cladding process for repairing and applying the powder material are as follows: carrying out laser cladding by adopting a 1-kilowatt gas laser and a full-automatic rotating tool, wherein the laser cladding parameters are as follows: the power is 2000-.
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| CN201711453408.4A CN108070740B (en) | 2017-12-28 | 2017-12-28 | Laser repair material for repairing titanium alloy valve core and valve seat |
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| CN108070740B true CN108070740B (en) | 2020-04-21 |
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| CN109097626A (en) * | 2018-10-08 | 2018-12-28 | 广州宇智科技有限公司 | A kind of metastable β Titanium-alloy with high damping characteristic and aging stability |
| CN113718246B (en) * | 2021-09-09 | 2022-11-15 | 南通大学 | Maritime work platform pile leg laser composite repairing method capable of eliminating cladding layer interface |
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| CN100505476C (en) * | 2004-03-26 | 2009-06-24 | 沈阳大陆激光技术有限公司 | Electric power generator, steam turbine rotor spindle repaired by laser and repairing method thereof |
| CN1276118C (en) * | 2004-10-19 | 2006-09-20 | 哈尔滨工业大学 | Composite material layer melted and coated on surface of titanium alloy through laser |
| CN101598139B (en) * | 2008-06-04 | 2013-03-27 | 北京有色金属研究总院 | Titanium alloy integral blade disc with composite performance and fabricating method thereof |
| CN101476059A (en) * | 2009-02-03 | 2009-07-08 | 宝鸡钛业股份有限公司 | Medium-strength and high-ductility titanium alloy |
| CN101603134B (en) * | 2009-07-10 | 2011-07-20 | 西北工业大学 | Titanium alloy for laser solid forming and laser shaping repairing |
| CN102312237B (en) * | 2011-09-08 | 2013-07-24 | 浙江工业大学 | Laser strengthening method for steam turbine titanium alloy blade |
| JP2015526625A (en) * | 2012-05-16 | 2015-09-10 | ゲーコーエヌ エアロスペース スウェーデン アーベー | Method of applying a titanium alloy on a substrate |
| CN102953058A (en) * | 2012-11-14 | 2013-03-06 | 沈阳黎明航空发动机(集团)有限责任公司 | Method for repairing wear of inner wall of intermediate casing of engine |
| CN104513979B (en) * | 2013-09-29 | 2017-06-13 | 浙江工业大学 | A kind of titanium alloy laser strengthened coat with spontaneous nano-particle reinforcement |
| CN103628056B (en) * | 2013-12-09 | 2016-06-08 | 山东建筑大学 | For material and the laser cladding method of TA15 Laser Cladding on Titanium Alloy |
| CN103993311A (en) * | 2014-06-06 | 2014-08-20 | 江苏大学 | Method for preparing Ti-Si alloy coating on titanium metal surface |
| CN104561995A (en) * | 2014-12-30 | 2015-04-29 | 浙江工业大学 | Titanium alloy laser-strengthened coating reinforced with spherical particles |
| CN105821408B (en) * | 2016-05-03 | 2018-06-05 | 中国航空工业集团公司北京航空材料研究院 | The process of TC4-DT titanium alloys is repaired using laser melting coating |
| CN106244853B (en) * | 2016-08-30 | 2018-04-06 | 南京赛达机械制造有限公司 | A kind of anti-water erosion titanium alloy turbine blade |
| CN107475711B (en) * | 2017-08-11 | 2020-08-11 | 沈阳钛成科技合伙企业（普通合伙） | Titanium alloy cutter wear-resistant coating and preparation method thereof |
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Application publication date: 20180525 Assignee: Shenyang Dalu Laser Complete Equipment Co.,Ltd. Assignor: Shenyang Dalu Laser Technology Co.,Ltd. Contract record no.: X2023210000149 Denomination of invention: A Laser Repair Material for Repairing Titanium Alloy Valve Cores and Valve Seats Granted publication date: 20200421 License type: Common License Record date: 20230927 |
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