CN107267976A - A kind of laser in combination processing technology for obtaining wear-and corrosion-resistant titanium alloy workpiece - Google Patents
A kind of laser in combination processing technology for obtaining wear-and corrosion-resistant titanium alloy workpiece Download PDFInfo
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- CN107267976A CN107267976A CN201710360721.7A CN201710360721A CN107267976A CN 107267976 A CN107267976 A CN 107267976A CN 201710360721 A CN201710360721 A CN 201710360721A CN 107267976 A CN107267976 A CN 107267976A
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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
- C23C24/103—Coating with metallic material, i.e. metals or metal alloys, optionally comprising hard particles, e.g. oxides, carbides or nitrides
- C23C24/106—Coating with metal alloys or metal elements only
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- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D10/00—Modifying the physical properties by methods other than heat treatment or deformation
- C21D10/005—Modifying the physical properties by methods other than heat treatment or deformation by laser shock processing
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Abstract
The present invention relates to Laser Processing and materialogy field, a kind of laser in combination processing technology for obtaining wear-and corrosion-resistant titanium alloy workpiece is refered in particular to.Titanium alloy substrate is preheated first, pre-heating temperature is less than titanium alloy phase transition temperature, then overlap joint scanning is carried out to titanium alloy member surface using carbon dioxide laser, afterwards immediately in laser emission area spray nanoscale (150 300nm) alloy powder, to specimen surface sanding and polishing after cooling, then room temperature laser-impact is used again, improves titanium alloy abrasion and corrosion resistance.
Description
Technical field
The present invention relates to Laser Processing and materialogy field, a kind of laser group for obtaining wear-and corrosion-resistant titanium alloy workpiece is refered in particular to
Close processing technology.Titanium alloy substrate is preheated first, pre-heating temperature is less than titanium alloy phase transition temperature, then using two
Carbon oxide laser device carries out overlap joint scanning to titanium alloy member surface, afterwards immediately in laser emission area spray nanoscale
(150-300nm) alloy powder, to specimen surface sanding and polishing after cooling, then uses room temperature laser-impact again, improves titanium and closes
Golden abrasion and corrosion resistance.
Background technology
Titanium is a kind of important structural metal grown up 1950s, and titanium alloy is because high, anti-corrosion with intensity
Property it is good, be widely used in every field the features such as heat resistance is high, the high temperature titanium that main application has development aero-engine is closed
The structural titanium alloy of gold and body, develops a collection of corrosion resistant Ti alloy the seventies, since the eighties, corrosion resistant Ti alloy and high-strength
Titanium alloy is further developed.Titanium alloy be mainly used in make aircraft engine compressor part, secondly for rocket, guided missile and
The structural member of high-speed aircraft, is a kind of conventional structural material, but itself hardness is low and the weakness such as abrasion and corrosion resistance difference
The performance of titanium alloy performance is greatly limit, make its application by larger restriction.
In order to improve the performance of titanium alloy, traditional surface reinforcing method typically uses metal surface coating, make its intensity,
Hardness, wearability are improved, but the strengthening layer that traditional metal surface enhanced method is obtained is relatively thin, and strengthening layer and matrix it
Between bond strength it is low, easily peel off, it is impossible to produce a desired effect.
In recent years, Laser Surface Treatment method is reached its maturity, and surface is carried out to titanium alloy using the method for laser alloying
Reinforcing be solve that titanium alloy is wear-resisting, corrosion-resistant, it is yielding the problems such as one of effective ways, and tradition side can be overcome
The defect of method.
The content of the invention
The technical problems to be solved by the invention are to provide a kind of new titanium alloy surface laser processing technology, and its feature exists
In：After being preheated to titanium alloy substrate, titanium alloy surface is carried out with laser in overlap joint scanning, scanning process using argon gas guarantor
Molten bath is protected, afterwards in laser emission area spray nanoscale (150-300nm) alloy powder, forms new alloy hardening after solidification
Layer, so that the surface abrasion resistance corrosion resistance of titanium alloy is improved, afterwards to carrying out laser impact intensified processing after sample sanding and polishing,
Further improve the resistance to corrosion of titanium alloy member.
Comprise the following steps that：
Step one, by pending titanium alloy sample be placed in alcoholic solution with supersonic wave cleaning machine remove surface dust with
Oil stain；
Step 2, titanium alloy substrate is put into chamber type electric resistance furnace and preheated, and heating-up temperature is less than the phase of titanium alloy
Temperature, heating-up temperature is set as 750-950 DEG C according to the phase transition temperature of titanium alloy, and pre-warmed mesh is carried out to titanium alloy sample
Be to reduce thermograde, improve residual stress distribution after laser melting, so as to improve jeting effect；
Step 3, takes out the titanium alloy sample for being heated to assigned temperature and sample is arranged on into the loading of laser-impact device and put down
On platform, laser beam spot center and matrix are treated that the shock surface upper left corner is overlapped, original position is handled as shock peening, and make
Treat that shock zone X-axis and Y direction are consistent with the X-axis and Y direction of weighted platform；
Step 4, opens laser, titanium alloy specimen surface is carried out in overlap joint scanning, scanning process using argon gas protection
Molten bath；
Step 5, behind laser beam heats metal surface, by powder feeder spray nozzle device immediately in laser emission area
Nanoscale (150~300nm) alloy powder is sprayed in domain, and the composition proportion of the alloy powder is：Al 55%, Ti 30%, Fe
7%, B 8%, is well mixed, and the initial velocity of injection alloy powder is 15-30mm/s, and the direction in alloy powder injection molten bath is with swashing
The angle of beam direction is 35 °, and the distance in nozzle and molten bath is 8-10mm, and powder feed rate is 70-160mg/s, by alloy
Behind powder injection titanium alloy substrate top layer, the matrix material of fusing and the alloy powder of addition are obtained due to the motion of laser molten pool
To mixing, formed after solidification based on matrix composition and different from the new alloy hardening layer of matrix composition, by being made
It is nanoscale (150-300nm) alloy powder particle, these hard particles will be embedded in the matrix of alloying, so that
The abrasion and corrosion resistance of titanium alloy surface is improved；
Step 6, after titanium alloy surface sanding and polishing, laser impact intensified, metal is carried out using aluminium foil as absorbed layer
Surface absorption laser energy evaporates, and produces high-pressure shocking wave, its surface is produced severe plastic deformation, refines surface layer grain, and
Great number residual compressive stress is induced in shock zone, the resistance to corrosion of titanium alloy member is further improved.
Step 7, carries out metallographic detection, and make wear resistant corrosion resistant test to top layer to titanium alloy.
In the step 4, laser is carbon dioxide laser, and running parameter is：Laser power density is 255-
455W/mm2, sweep speed is 0.2-1.0m/min, and spot diameter is 3mm；Set in the ranks row between hot spot overlapping rate as 20%.
Laser impact intensified running parameter is in the step 6：Scan power is 1.5-2.2kW, and spot diameter is
3mm, sweep speed is 150-250mm/min, and overlapping rate is 50%.
It is the raising in order to ensure the planarization of titanium alloy specimen surface to titanium alloy sample sanding and polishing in the step 6
Laser impact intensified efficiency.
The technique effect of the present invention：The present invention is first preheated to titanium alloy substrate, and heating-up temperature is less than titanium alloy phase alternating temperature
Degree, reduces thermograde in the case where titanium alloy is not undergone phase transition, and eliminates residual stress, stable interior tissue and size are carried
High jeting effect, then carries out overlap joint scanning, afterwards immediately in laser emission area with carbon dioxide laser to titanium alloy surface
Nanoscale (150-300nm) alloy powder is sprayed in domain, and new alloy hardening layer is formed after solidification, improves the surface abrasion resistance of titanium alloy
Corrosion resistance, finally carries out laser impact intensified processing slightly after sanding and polishing, further improve the anticorrosive of titanium alloy member
Ability.
Brief description of the drawings
Fig. 1 is laser impact intensified schematic device of the invention.
Fig. 2 is hardware top layer micro-organization chart after laser in combination processing technology of the present invention, and (a) is laser group of the present invention
The preceding metal surface microstructure of processing technology is closed, (b) is metal surface microstructure after laser in combination of the present invention processing.
In figure：1. laser, 2. laser control devices, 3. laser beams, 4. powder feeders, 5. samples, 6. loadings are flat
Platform, the outlet of 7. protective gas, 8. dust outlets.
Embodiment
Below in conjunction with the accompanying drawings and specific embodiment, technical scheme is described in further details.
The present invention uses laser processing technology, and first matrix is preheated, and then titanium is closed with carbon dioxide laser
Gold surface is carried out using argon gas protection molten bath in overlap joint scanning, scanning process, to laser emission area spray nanoscale (150-
New alloy hardening layer is formed after 300nm) alloy powder, solidification, the surface abrasion resistance corrosion resistance of titanium alloy is improved, then slightly
Laser impact intensified processing is carried out after sanding and polishing, the resistance to corrosion of titanium alloy member is further improved.
Embodiment：
Ti-6AL-4V is chosen as research object, Ti-6AL-4V is made to 50mm × 50mm × 6mm block sample, will
Pending sample is placed on the dust and oil stain for removing surface in alcoholic solution with supersonic wave cleaning machine.
Ti-6AL-4V samples are put into chamber type electric resistance furnace SX2 10 12 and are preheated (Ti-6Al-4V phase alternating temperature
Spend for 998 DEG C), heating-up temperature is set as 900 DEG C.
Taking-up is heated to 900 DEG C of Ti-6AL-4V samples and is installed on laser-impact device weighted platform 6, will
Laser beam spot center treats that the shock surface upper left corner is overlapped with matrix, handles original position as shock peening, and make to wait to impact
Region X-axis and Y direction are consistent with the X-axis and Y direction of weighted platform.
The power output and hot spot of continuous DL HL T5000 carbon dioxide lasers are set by laser control device 2
Parameter：Laser power density is 255-455W/mm2, sweep speed is 0.2-1.0m/min, and spot diameter is 3mm, sets powder
Feeder powder feed rate is 70-160mg/s, opens laser 1, and overlap joint scanning is carried out to Ti-6AL-4V specimen surfaces, if
It is fixed that in the ranks hot spot overlapping rate is to protect molten bath using argon gas in 20%, scanning process between row.
After laser beam heats specimen surface, using PEL 1A powder feeders spray nozzle device 4 immediately in laser emission area
Nanoscale (150~300nm) alloy powder is sprayed in domain, and the composition proportion of the alloy powder is：Al 55%, Ti 30%, Fe
7%, B 8%, is well mixed, wherein by adjusting nozzle center's axle of powder feeder so that alloy powder is injected into metal and melted
The accurate location in pond, the initial velocity of injection alloy powder is 15-30mm/s, the direction and laser beam side in alloy powder injection molten bath
To angle be 35 °, the distance in nozzle and molten bath is 8-10mm, and powder feed rate is 70-160mg/s, and alloy powder is noted
Enter behind sample top layer, the matrix material of fusing and the alloy material of addition are mixed due to the motion of laser molten pool, are solidified
Formed afterwards based on matrix composition and different from the new alloy hardening layer of matrix composition, due to it is used be nanoscale
(150-300nm) alloy powder particle, these hard particles will be embedded in the matrix of alloying, so that titanium alloy surface
Abrasion and corrosion resistance is improved；
After Ti-6AL-4V specimen surface sanding and polishings, laser punching is carried out as absorbed layer using aluminium foil thick 0.12mm
Reinforcing is hit, the resistance to corrosion of titanium alloy member is further improved, laser impact intensified running parameter is：Scan power is
1.5-2.2kW, spot diameter is 3mm, and sweep speed is 150-250mm/min, and overlapping rate is 50%.
Metallographic detection is carried out to Ti-6AL-4V samples.As shown in Fig. 2 before and after comparative analysis laser in combination processing of the present invention
Titanium alloy surface microstructure, it is observed that before processing there are a large amount of stomatas and be mingled with titanium alloy top layer microstructure, crystal grain
It is thick, and the uniform tiny densification of titanium alloy surface microstructure after laser in combination processing, eliminate crackle, be mingled with scarce with stomata etc.
Fall into, overlay is high with substrate combinating strength, crystal grain is refined, and wear and corrosion behavior is improved.
The present embodiment forms a kind of new alloy hardening layer in Ti-6AL-4V specimen surfaces, carries out laser-impact again afterwards
Reinforcing, makees to top layer after wear resistant corrosion resistant test, it is found that sample wearability improves 40%, corrosion resistance after laser in combination processing
Improve 33%.
Claims (6)
1. a kind of laser in combination processing technology for obtaining wear-and corrosion-resistant titanium alloy workpiece, it is characterised in that：It is pre- to titanium alloy substrate
After heating, titanium alloy surface is carried out with laser using argon gas protection molten bath in overlap joint scanning, scanning process, afterwards in laser
Nanoscale alloy powder is sprayed in radiation areas, new alloy hardening layer is formed after solidification, so as to improve the surface abrasion resistance of titanium alloy
Corrosion resistance, afterwards to carrying out laser impact intensified processing after sample sanding and polishing, further improves the anti-corruption of titanium alloy member
Erosion ability.
2. a kind of laser in combination processing technology for obtaining wear-and corrosion-resistant titanium alloy workpiece as claimed in claim 1, its feature exists
In comprising the following steps that：
Step one, pending titanium alloy sample is placed on to the dust and oil for removing surface in alcoholic solution with supersonic wave cleaning machine
Stain；
Step 2, titanium alloy substrate is put into chamber type electric resistance furnace and preheated, and heating-up temperature is less than the phase alternating temperature of titanium alloy
Degree, titanium alloy sample is carried out pre-warmed purpose be in order to reduce thermograde, improve residual stress distribution after laser melting,
So as to improve jeting effect；
Step 3, takes out the titanium alloy sample for being heated to assigned temperature and sample is arranged on into laser-impact device weighted platform
On, laser beam spot center and matrix are treated that the shock surface upper left corner is overlapped, original position is handled as shock peening, and make to treat
Shock zone X-axis and Y direction are consistent with the X-axis and Y direction of weighted platform；
Step 4, opens laser, titanium alloy specimen surface is carried out molten using argon gas protection in overlap joint scanning, scanning process
Pond；
Step 5, behind laser beam heats metal surface, is sprayed in laser emission region immediately by powder feeder spray nozzle device
Nanoscale alloy powder is penetrated, alloy powder is injected behind titanium alloy substrate top layer, the matrix material of fusing and the alloyed powder of addition
End is mixed due to the motion of laser molten pool, is formed after solidification based on matrix composition and different from matrix composition
New alloy hardening layer, due to it is used be nanoscale alloy powder particle, these hard particles will be embedded in alloying
In matrix, so that the abrasion and corrosion resistance of titanium alloy surface is improved；
Step 6, after titanium alloy surface sanding and polishing, laser impact intensified, metal surface is carried out using aluminium foil as absorbed layer
Laser energy evaporation is absorbed, high-pressure shocking wave is produced, its surface is produced severe plastic deformation, surface layer grain is refined, and in punching
Hit region and induce great number residual compressive stress, further improve the resistance to corrosion of titanium alloy member；
Step 7, carries out metallographic detection, and make wear resistant corrosion resistant test to top layer to titanium alloy.
3. a kind of laser in combination processing technology for obtaining wear-and corrosion-resistant titanium alloy workpiece as claimed in claim 1 or 2, its feature
It is, pre-heating temperature is 750-950 DEG C.
4. a kind of laser in combination processing technology for obtaining wear-and corrosion-resistant titanium alloy workpiece as claimed in claim 1 or 2, its feature
It is, the particle diameter of nanoscale alloy powder is 150~300nm, and the composition proportion of alloy powder is：Al 55%, Ti 30%, Fe
7%, B 8%；The initial velocity for spraying alloy powder is 15-30mm/s, the direction in alloy powder injection molten bath and beam direction
Angle be 35 °, the distance in nozzle and molten bath is 8-10mm, and powder feed rate is 70-160mg/s.
5. a kind of laser in combination processing technology for obtaining wear-and corrosion-resistant titanium alloy workpiece as claimed in claim 1 or 2, its feature
It is, laser is carbon dioxide laser, running parameter is：Laser power density is 255-455W/mm2, sweep speed is
0.2-1.0m/min, spot diameter is 3mm；Set in the ranks row between hot spot overlapping rate as 20%.
6. a kind of laser in combination processing technology for obtaining wear-and corrosion-resistant titanium alloy workpiece as claimed in claim 1 or 2, its feature
It is, laser impact intensified running parameter is：Scan power is 1.5-2.2kW, and spot diameter is 3mm, and sweep speed is
150-250mm/min, overlapping rate is 50%.
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Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107760861A (en) * | 2017-12-08 | 2018-03-06 | 天津大学 | A kind of laser for bearing of wind power generator surface melts surface modification device and method again |
| CN108754373A (en) * | 2018-06-15 | 2018-11-06 | 湖南大学 | A kind of pulse laser surface melting method for realizing the regulation and control of titanium alloy surface grain form |
| CN108817671A (en) * | 2018-07-06 | 2018-11-16 | 广东工业大学 | Silk material electric arc melts product and laser-impact forges compound increase and decrease material manufacturing method and device |
| CN109112258A (en) * | 2018-08-20 | 2019-01-01 | 南通大学 | A kind of easy cavitation zone laser compound processing method of mud pump blade |
| CN109750242A (en) * | 2019-02-19 | 2019-05-14 | 江苏大学 | The method that laser impact intensified combination magnetron sputtering promotes Magnesium Anti-Corrosion |
| CN113102900A (en) * | 2021-03-15 | 2021-07-13 | 沈阳万超激光科技有限公司 | Method for improving quality of water-conducting laser-machined hole through heat treatment |
| CN114932383A (en) * | 2022-06-28 | 2022-08-23 | 西安泰金工业电化学技术有限公司 | Manufacturing method of seamless cathode roller titanium cylinder for electrolytic copper foil |
| CN115255234A (en) * | 2022-07-28 | 2022-11-01 | 广东鸿凯高科有限公司 | Titanium material forging processing technology and application thereof in core component of new energy lithium battery equipment |
| CN115821027A (en) * | 2022-10-25 | 2023-03-21 | 北京翔博科技股份有限公司 | Method, device and equipment for eliminating residual stress based on laser ultrasound |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN107760861A (en) * | 2017-12-08 | 2018-03-06 | 天津大学 | A kind of laser for bearing of wind power generator surface melts surface modification device and method again |
| CN108754373A (en) * | 2018-06-15 | 2018-11-06 | 湖南大学 | A kind of pulse laser surface melting method for realizing the regulation and control of titanium alloy surface grain form |
| CN108817671A (en) * | 2018-07-06 | 2018-11-16 | 广东工业大学 | Silk material electric arc melts product and laser-impact forges compound increase and decrease material manufacturing method and device |
| CN109112258A (en) * | 2018-08-20 | 2019-01-01 | 南通大学 | A kind of easy cavitation zone laser compound processing method of mud pump blade |
| CN109750242A (en) * | 2019-02-19 | 2019-05-14 | 江苏大学 | The method that laser impact intensified combination magnetron sputtering promotes Magnesium Anti-Corrosion |
| CN113102900A (en) * | 2021-03-15 | 2021-07-13 | 沈阳万超激光科技有限公司 | Method for improving quality of water-conducting laser-machined hole through heat treatment |
| CN114932383A (en) * | 2022-06-28 | 2022-08-23 | 西安泰金工业电化学技术有限公司 | Manufacturing method of seamless cathode roller titanium cylinder for electrolytic copper foil |
| CN114932383B (en) * | 2022-06-28 | 2023-08-04 | 西安泰金新能科技股份有限公司 | Manufacturing method of seamless cathode roller titanium cylinder for electrolytic copper foil |
| CN115255234A (en) * | 2022-07-28 | 2022-11-01 | 广东鸿凯高科有限公司 | Titanium material forging processing technology and application thereof in core component of new energy lithium battery equipment |
| CN115821027A (en) * | 2022-10-25 | 2023-03-21 | 北京翔博科技股份有限公司 | Method, device and equipment for eliminating residual stress based on laser ultrasound |
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