CN105543842B - Wear-resisting-the high-temperaure coating and its implementation that titanium alloy surface is formed - Google Patents
Wear-resisting-the high-temperaure coating and its implementation that titanium alloy surface is formed Download PDFInfo
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- CN105543842B CN105543842B CN201610008234.XA CN201610008234A CN105543842B CN 105543842 B CN105543842 B CN 105543842B CN 201610008234 A CN201610008234 A CN 201610008234A CN 105543842 B CN105543842 B CN 105543842B
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- 238000000576 coating method Methods 0.000 title claims abstract description 42
- 239000011248 coating agent Substances 0.000 title claims abstract description 41
- 229910001069 Ti alloy Inorganic materials 0.000 title claims abstract description 31
- 238000000034 method Methods 0.000 claims abstract description 43
- 238000010892 electric spark Methods 0.000 claims abstract description 37
- 229910045601 alloy Inorganic materials 0.000 claims abstract description 28
- 239000000956 alloy Substances 0.000 claims abstract description 28
- 238000002844 melting Methods 0.000 claims abstract description 22
- 230000008018 melting Effects 0.000 claims abstract description 22
- 238000003723 Smelting Methods 0.000 claims abstract description 13
- 239000007772 electrode material Substances 0.000 claims abstract description 13
- 239000004411 aluminium Substances 0.000 claims abstract description 7
- 229910052782 aluminium Inorganic materials 0.000 claims abstract description 7
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims abstract description 7
- 238000002360 preparation method Methods 0.000 claims abstract description 3
- 239000010936 titanium Substances 0.000 claims description 12
- 239000010949 copper Substances 0.000 claims description 10
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims description 9
- 229910052802 copper Inorganic materials 0.000 claims description 9
- 229910052719 titanium Inorganic materials 0.000 claims description 7
- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical compound [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 claims description 6
- 238000006243 chemical reaction Methods 0.000 claims description 6
- 238000007499 fusion processing Methods 0.000 claims description 6
- 229910000851 Alloy steel Inorganic materials 0.000 claims description 5
- 230000003746 surface roughness Effects 0.000 claims description 5
- 239000013077 target material Substances 0.000 claims description 2
- 239000010409 thin film Substances 0.000 claims description 2
- 239000000463 material Substances 0.000 abstract description 9
- 230000015572 biosynthetic process Effects 0.000 abstract description 2
- 229910052500 inorganic mineral Inorganic materials 0.000 abstract description 2
- 239000011707 mineral Substances 0.000 abstract description 2
- 239000010410 layer Substances 0.000 description 10
- 238000005516 engineering process Methods 0.000 description 6
- 239000000758 substrate Substances 0.000 description 4
- 239000011247 coating layer Substances 0.000 description 3
- 230000006378 damage Effects 0.000 description 3
- 239000003350 kerosene Substances 0.000 description 3
- 238000005728 strengthening Methods 0.000 description 3
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 2
- 229910010038 TiAl Inorganic materials 0.000 description 2
- ATJFFYVFTNAWJD-UHFFFAOYSA-N Tin Chemical compound [Sn] ATJFFYVFTNAWJD-UHFFFAOYSA-N 0.000 description 2
- 238000005299 abrasion Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000010438 heat treatment Methods 0.000 description 2
- 230000001050 lubricating effect Effects 0.000 description 2
- 229910052751 metal Inorganic materials 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 239000010959 steel Substances 0.000 description 2
- 239000002344 surface layer Substances 0.000 description 2
- 238000012546 transfer Methods 0.000 description 2
- 229910000531 Co alloy Inorganic materials 0.000 description 1
- 229910001315 Tool steel Inorganic materials 0.000 description 1
- 238000010521 absorption reaction Methods 0.000 description 1
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 230000009172 bursting Effects 0.000 description 1
- 229910052804 chromium Inorganic materials 0.000 description 1
- 230000000052 comparative effect Effects 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 229910052593 corundum Inorganic materials 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000009760 electrical discharge machining Methods 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 239000002360 explosive Substances 0.000 description 1
- 239000007789 gas Substances 0.000 description 1
- PCHJSUWPFVWCPO-UHFFFAOYSA-N gold Chemical compound [Au] PCHJSUWPFVWCPO-UHFFFAOYSA-N 0.000 description 1
- 239000010931 gold Substances 0.000 description 1
- 229910052737 gold Inorganic materials 0.000 description 1
- 229910000765 intermetallic Inorganic materials 0.000 description 1
- 239000000314 lubricant Substances 0.000 description 1
- 238000005461 lubrication Methods 0.000 description 1
- 239000010721 machine oil Substances 0.000 description 1
- 239000012092 media component Substances 0.000 description 1
- 239000000155 melt Substances 0.000 description 1
- 238000013508 migration Methods 0.000 description 1
- 230000005012 migration Effects 0.000 description 1
- 238000002156 mixing Methods 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 229910052757 nitrogen Inorganic materials 0.000 description 1
- 230000003647 oxidation Effects 0.000 description 1
- 238000007254 oxidation reaction Methods 0.000 description 1
- 230000001590 oxidative effect Effects 0.000 description 1
- 238000007745 plasma electrolytic oxidation reaction Methods 0.000 description 1
- 239000004033 plastic Substances 0.000 description 1
- 238000007747 plating Methods 0.000 description 1
- 238000004321 preservation Methods 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 238000007670 refining Methods 0.000 description 1
- 230000003014 reinforcing effect Effects 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 239000011863 silicon-based powder Substances 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
- 230000009466 transformation Effects 0.000 description 1
- 229910052721 tungsten Inorganic materials 0.000 description 1
- 229910001845 yogo sapphire Inorganic materials 0.000 description 1
Classifications
-
- 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
- C23C26/00—Coating not provided for in groups C23C2/00 - C23C24/00
- C23C26/02—Coating not provided for in groups C23C2/00 - C23C24/00 applying molten material to the substrate
Landscapes
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Mechanical Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Other Surface Treatments For Metallic Materials (AREA)
Abstract
A kind of wear-resisting-the high-temperaure coating and its implementation of titanium alloy surface formation, electrode material is used as 11Cr15Ni25Mo6NMn2, fine aluminium, hard alloy T15K6, BK6M or with aluminothermic process obtains alloy W-Cr-Co, realizes by electric spark melting mode the preparation of surface covering in the titanium alloy surface of TA15, TC6 or TC1；The present invention effectively imposes wear-resisting-heat resistant coating to titanium alloy surface with electric spark method of smelting with cheap electrode material by selecting from raw mineral materials.
Description
Technical field
The present invention relates to a kind of technology of alloy surface process field, specifically a kind of titanium alloy surface is formed resistance to
Mill-high-temperaure coating and its implementation.
Background technique
The extensive utilization titanium alloy component in Aeronautics and Astronautics, transportation and machine-building.There are two homoatomics for pure titanium
Xenocryst body: at 882.5 DEG C, the following are close-packed hexagonal lattices, referred to as α-Ti；882.5 DEG C the above are body-centered cubic lattics, referred to as β-
The heat resistance of Ti, β-Ti are poor, but process plastic is preferable, are easy to forge.Titanium and its alloy have high specific strength (strength/density)
With excellent corrosion resisting property；Unfortunately there is adherency hardening tendency, so that leading to friction destruction, or even tear from friction surface
One piece.Although titanium alloy heat resistance is preferable, more than 500~600 DEG C, heat resistance is just overshadowed, limit it
Application on friction component.In order to avoid titanium alloy aoxidizes under 500 DEG C of temperatures above and improves its wear-resisting property, people find out
Many methods, such as use surface covering method, make surface be subjected to micro-arc oxidation processing, or even by gas heat treatment, plating and
Explosive strengthening in dedicated capacitive energy and other valuable devices.
After searching and discovering the prior art, Chinese patent literature CN104972188A, open (bulletin) day
2015.10.14, a kind of method modified using electric spark progress titanium alloy surface, including funnel are disclosed, is characterized in that: will
Titanium alloy to be processed is cooled to -100~-80 DEG C, with Cu base SiC combination electrode in kerosene to the titanium alloy workpiece of vibration into
Row electrical discharge machining, the discharge current of electric spark are 3~6A, and pulse width is 60~90 μ s, and the pulse spacing is 5~7s；Kerosene
It is 3~5 μm of Si powder that also mixing, which has partial size,.But the technology can not solve the resistance to heat problem of titanium alloy, and hardness raising is limited, wear-resisting
Also it is difficult to meet industrial needs；In addition, the mode of operation that the technology discharges electric spark in kerosene will cause to environment dirt
Dye；And for its operation temperature from -80~1165 DEG C, the big complication that will result directly in facilities and equipments of temperature span is technique
Large-scale promotion out tape come it is difficult.
Chinese patent literature CN103031509A, open (bulletin) day 2013.04.10 disclose a kind of using high frequency
The method that pulse ion arc technology strengthens titanium alloy surface, this method uses the high-frequency impulse ion arc technology of 2000Hz, with WC
As electrode is strengthened, TiC strengthening layer is prepared in titanium alloy surface.Strengthening layer thickness is up to 0.05mm.But the technology is to titanium alloy
Surface abrasion resistance could not reach optimum state, only only use a kind of material of WC as reinforcing electrode；And titanium could not be solved
The resistance to heat problem of alloy surface.
Summary of the invention
The present invention In view of the above shortcomings of the prior art, proposes a kind of wear-resisting-high temperature resistant that titanium alloy surface is formed
Coating and its implementation select effectively to give titanium to close with electric spark method of smelting with cheap electrode material from raw mineral materials
Gold surface imposes wear-resisting-heat resistant coating.
The present invention is achieved by the following technical solutions:
The present invention use electrode material be respectively for 11Cr15Ni25Mo6NMn2, fine aluminium, hard alloy YT15, YD10 or
Alloy W-Cr-Co is obtained with aluminothermic process, surface is realized by electric spark melting mode in the titanium alloy surface of TA15, TC6 or TC1
The preparation of coating.
The titanium alloy surface is preferably machined and is ground to surface roughness Ra=0.8~1.2 μm.
The titanium alloy surface is further preferably coated with thick 15~25 μm of additional copper coating.
The electric spark melting, for the continuous impulse frequency used for 400~500Hz, unit pulse energy is 0.18
~0.32J, pulse duration are 40~100 μ s.
The method specifically includes the following steps:
Step 1) it is machined by titanium alloy plate TA15, TC6 or TC1 and be ground to surface roughness Ra=0.8~
1.2 μm, as cathode；
Step 2) is 0.09~1.21J using output energy, and current strength is the electric spark melting machine of 0.5~2.8A, first
It first is coated with copper coating in cathode surface, it is 15~25 μm thick；Then setting anode is alloy steel electrode
11Cr15Ni25Mo6NMn2, aluminium, hard alloy YT15, YD10 obtain alloy W-Cr-Co with aluminothermic process.
Step 3) uses electric spark smelting apparatus, and electric spark fusion process Energy Conversion parameter W is arrangedndFor 8.2~
9.6kJ/cm2, unit pulse 0.18~0.32J of energy, continuous impulse frequency be 400~500Hz, the pulse duration 40~
100 μ s, thus in target material surface melting thin film.
The electric spark fusion process Energy Conversion parameter is finally melted in formation uniform coating and subsequent laminated coating
The corresponding process parameter value of refining processWherein: C is coefficient, and τ is the pulse duration, x be following unitary three times
Dull effective cube of equattion root in three solutions of equation: x3-3(2+Bfp)x2+3(1+Bfp)x+Bfp-(Bfp)3=0, the equation
Other two solution be invalid imaginary number；fpFor spark discharge pulse frequency, B is pulse interval coefficient.
The electric spark smelting apparatus, comprising: be relatively arranged on the indoor cathode of vacuum and target, and be set to yin
Anode between pole and target.
Electromagnetic block is equipped with outside the vacuum chamber.
The present invention relates to a kind of wear-resisting-high-temperaure coatings being prepared according to the above method, with a thickness of 28~90 μ
Km, roughness are 0.8~3.9 μ km, and compactness is 62~100%.
The microhardness of the coating is 355~1642MPa, and strength factor is 1~4.05, and transport materials coefficient is 0.22
~0.78.
Detailed description of the invention
Fig. 1 is electric spark smelting process process schematic；
In figure: 1 be cathode, 2 be anode, 3 be collector, 4 be vacuum chamber, 5 be cathode plasma, 6 be anode etc. from
Son, 7 be electromagnetic block, 8 be plasma source, 9 be target；
Fig. 2 is typical cathode ∑ △kWith anode ∑ △aWeight change and energy transfer value Wn relation schematic diagram；
In figure: txFor melting layer brittle break limit (door), TxCritical limit, W for surface damage layernxIt is broken for brittleness
Bad energy limit, WndTo recommend final electric spark fusion process Energy Conversion；A is cathode, b is anode.
Specific embodiment
As shown in Figure 1, for the electric spark smelting apparatus that the present embodiment uses, 1 He of cathode being relatively arranged in vacuum chamber 4
Target 9, and the anode 2 being set between cathode 1 and target 9.
Electromagnetic block 7 is equipped with outside the vacuum chamber 4.
The present embodiment takes out sample by Titanium alloy TA15, TC6, TC1 respectively, is machined and is ground to surface roughness Ra
=0.8~1.2 μm.Electric spark smelting electrode material is followed successively by 11Cr15Ni25Mo6NMn2, fine aluminium, hard alloy YT15, YD10
Alloy W-Cr-Co is obtained with aluminothermic process.
Uniform coating is formed by these materials.In order to guarantee along coating layer thickness in d σxMechanical property under the conditions of/dz > 0
Increase (σxFor the bursting stress on tangent plane direction, z is vertically to cut flat with areal coordinate), steel alloy is imposed by electric spark smelting process and is applied
Before layer 11Cr15Ni25Mo6NMn2 and hard alloy YT15, YD10 and alloy W-Cr-Co, it is coated with thick 15~25 μm of additional copper
Coating.
Under the conditions of electric spark melting dynamics research, it is determined that positive unit corrodes ΔaWith cathode unit increment ΔkWith
Time relationship.Namely spend in sample 1cm2Institute's quota of expenditure energy on area.In such cases, the technological parameter of process
Dominant energy consumes numerical value Wn, i.e., consumption is in melting 1cm2Coating energy.For each device modular working and use electrode
Pair, according to single pulse the average energy value WpDetermine WnValue.Single pulse average energy is obtained according to from oscillograph C8-17 in pole
The waveform diagram of spacing voltage and current directly calculates.Given energy values calculate are as follows: Wn=WpNpT=Wp(60fpKp) t,
In: NpIt is melting 1cm for average pulse number, the t in 1 minute2Surface area required time, fpFor subsequent spark discharge pulse frequency
Rate, Kp=Np/fpTo determine spark pulse transmission probability coefficient.
Sole anode etch value ΔaWith single cathode increment DeltakAccording to gravimetric observation method: passing through every point of electric spark melting
Clock process calculates total value (for ∑ △ according to anodic souring using 0.0002g weight sensing instrument is accurate toa) and total cathode increment ∑
△k.Material transport coefficient K=Δk/△aThe melting of each electrode material within the set time has been determined.
Typical cathode ∑ △kWith anode ∑ △aWeight change depends on transfer energy value Wn(corresponding regulation coating layer thickness h
Convey energy value), consider melting 1cm2Conversion, is shown in Fig. 2 a and Fig. 2 b the time required to surface area.It is obvious, various electrode pair weight
Running parameter is identical.But the difference of mass change value is determined by the element material of electrode and the media components of surrounding, very
It is extremely related with the energy parameter of the technical process of electric spark melting.Fig. 2 a relationship is provided, cathode quality changes by anode surface layer
Destruction crash time TxTo limit.
Technological parameter W is had been determined to each electrode pairndAnd its prepare, to guarantee that cathode speed maximizes and guarantees height
Coating density, numerical value is as follows.
1 technological parameter W of tablendAnd its energy composition
Table 2 is to be implemented according to above-mentioned parameter as a result, i.e. titanium alloy coating parameter average value.
2 titanium alloy coating parameter average value of table
Wherein: HμnFor coating microhardness；Hμ0For substrate microhardness.
Analysis the results show that improve microhardness using hard alloy electrode, and use alloy tool to the maximum extent
Steel 11Cr15Ni25Mo6AMn2 and W-Cr-Co steel alloy guarantees that acquisition coating is most thick most closely knit.As seen from the data in Table 2, on surface
There are relation of interdependence between roughness and process parameter value.
Sample shows the melt mutually hard with β-Ti there are α phase after X-ray phase analysis electric spark is smelted, or even on surface
There is complicated carbide and intermetallic compound (W, Ti, Cr) C in layer1-x, Co3Ti, Al2O3With a large amount of TiN.Demonstrate product
Pole absorbs nitrogen in titanium, air is separated under electric spark smelting condition, including form TiN, to form high microhardness surface.
The wear-out life of comparative test, rubbing machine according to " axis-watt " series according to national standard GB T12444-2006 carry out, make
With contact pressure 1MPa, it is wound around under the conditions of unlubricated friction sample sliding rotation speed and is 0.25m/s, even rubs critical
No. 20 machine oil are supplied under the conditions of wiping as lubricant.The coating of sample watt is tool steel 4X5W2VSi (52-58HRC), rotating disk
The material of axis is the 40Cr to harden, 62-64HRC.Wear coating life according to compared with uncoated Wear specimens, daily 5km
Total 20km, is re-weighed.Experiment is repeated 5 times.
Increased weight under determining heat resistant coating on the micro- weigher of Q-1000 type according to oxidizing condition in air.Sample
600 and 700 DEG C twice are heated respectively, heat preservation 15h furnace cooling to room temperature.Thermograph is recorded in oxidation, heat absorption and heat release
Impact effect under conditions of increased quality, it is also related with the upper structural transformation of specimen surface product and migration quality increase.
Friction process feature is obtained according to sample unit increase weight basic result and heat resistant coating is listed in table 3.
3 coating performance experimental study (being averaged) of table
It has been made using aluminium electrode with high compact minimum cover thickness, but under electric spark melting condition, shape
At intermediate compound TiAl to guarantee to increase to greatest extent coating heat resistance to 2.3-3.0 times.The rate of wear of such coating is low
In not having a cated sample, but it is higher than and uses other electrode materials coating obtained.
The rate of wear and coefficient of friction and friction area temperature phase when friction under critical lubrication and dry conditions
It closes.It is lower than the hard alloy coating rate of wear in the W-Cr-Co alloy electrode material obtained using high quality with aluminothermic process, it is thick
Degree is 1.4~1.7 times of hard alloy coating.
Under the conditions of unlubricated friction, titanium alloy coating abrasion speed can be lined up from high to low by quality: Al → YT15
Hard alloy → 11Cr15Ni25Mo6AMn2 → YD10 hard alloy → W-Cr-Co；And under critical lubricating condition: Al →
11Cr15Ni25Mo6AMn2 → YT15 hard alloy → YD10 hard alloy → W-Cr-Co.
Lining is added when forming copper on surface with electric spark method of smelting, thickness reaches 15~25 μm, in coating surface shape
The electrode material and hard alloy YT15 of Cheng Xin applies either under critical lubricating condition or under the conditions of unlubricated friction
Layer than it is all have the substrate rate of wear it is low~30%.
Titanium alloy is under electric spark melting condition, it can be seen that corrosion-resisting steel, aluminium, hard alloy and alloy W-Cr-Co are to mention
High superficial layer is wear-resisting and heating resisting metal.Electrode material is done due to using steel alloy 11Cr15Ni25Mo6AMn2 and alloy W-Cr-Co
Material, compared with hard alloy makees electrode material, being formed has 100% density, and coating layer thickness increases to 1.5~3.6 times.
Sample under electric spark melting condition use aluminized coating, improve heat resistance can reach 3 times, this explanation be exactly
Its superficial layer forms intermetallic metal TiAl.
In order to form electric spark melting coated substrate layer using copper electrode, no matter is all substrate surface layer friction process features
It is critical friction condition or unlubricated friction condition, coating index all improves 30%.
Analysis the results show that electric spark melting be one effectively and it is fabulous can operating process, allow using extensive each
The electrode material of kind kind, significantly improves titanium alloy surface service performance.
Above-mentioned specific implementation can by those skilled in the art under the premise of without departing substantially from the principle of the invention and objective with difference
Mode carry out local directed complete set to it, protection scope of the present invention is subject to claims and not by above-mentioned specific implementation institute
Limit, each implementation within its scope is by the constraint of the present invention.
Claims (7)
1. a kind of implementation method for wear-resisting-high-temperaure coating that titanium alloy surface is formed, which is characterized in that use electrode material for
11Cr15Ni25Mo6NMn2 obtains alloy W-Cr-Co or hard alloy YT15 with aluminothermic process, in the titanium of TA15, TC6 or TC1
Alloy surface realizes the preparation of surface covering by electric spark melting mode；
The electric spark melting, the continuous impulse frequency used for 400~500Hz, unit pulse energy be 0.18~
0.32J, pulse duration are 40~100 μ s；Lining is added when forming copper on surface with electric spark method of smelting, thickness reaches
15~25 μm, lined surfaces are added in copper and form above-mentioned coating.
2. according to the method described in claim 1, it is characterized in that, the titanium alloy surface is machined and be ground in advance
Surface roughness Ra=0.8~1.2 μm.
3. method according to claim 1 or 2, characterized in that the titanium alloy surface is coated with 15~25 μm thick in advance
Additional copper coating.
4. according to the method described in claim 1, it is characterized in that, specifically includes the following steps:
Step 1) is machined by titanium alloy plate TA15, TC6 or TC1 and is ground to surface roughness Ra=0.8~1.2 μ
M, as cathode；
Step 2) is 0.09~1.21J using output energy, and current strength is the electric spark melting machine of 0.5~2.8A, is existed first
Cathode surface is coated with copper coating, 15~25 μm thick；Then setting anode is alloy steel electrode 11Cr15Ni25Mo6NMn2 or uses aluminium
Thermal method obtains alloy W-Cr-Co；
Step 3) uses electric spark smelting apparatus, and electric spark fusion process Energy Conversion parameter W is arrangedndFor 8.2~9.6kJ/
cm2, unit pulse 0.18~0.32J of energy, continuous impulse frequency be 400~500Hz, 40~100 μ s of pulse duration, from
And in target material surface melting thin film.
5. according to the method described in claim 4, it is characterized in that, the electric spark smelting apparatus, comprising: be relatively arranged on true
Empty indoor cathode and target, and the anode being set between cathode and target.
6. according to the method described in claim 5, it is characterized in that, electromagnetic block is equipped with outside the vacuum chamber.
7. according to the method described in claim 4, it is characterized in that, the electric spark fusion process Energy Conversion parameter exists
Form uniform coating and the corresponding process parameter value of the final fusion process of subsequent laminated coatingWherein: C is to be
Number, τ are the pulse duration, and x is the dull effective cube of equattion root in three solutions of following simple cubic equation:
x3-3(2+Bfp)x2+3(1+Bfp)x+Bfp-(Bfp)3=0, the other two solution of the equation is invalid imaginary number；fpFor spark
Discharge pulse frequency, B are pulse interval coefficient.
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| US10245666B2 (en) | 2016-06-30 | 2019-04-02 | General Electric Company | Drilling tool for use in machining a conductive work piece |
| CN109321914B (en) * | 2018-11-21 | 2020-05-15 | 北京金轮坤天特种机械有限公司 | Method for depositing titanium alloy surface coating by electric spark under kerosene protection |
| CN112941510B (en) * | 2021-01-26 | 2022-08-02 | 山东大学 | Device and method for preparing high-entropy alloy coating through electric spark deposition |
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Denomination of invention: Wear-resistant and high-temperature resistant coatings formed on titanium alloy surfaces and their implementation methods Effective date of registration: 20231106 Granted publication date: 20190108 Pledgee: Meixi Branch of Zhejiang Anji Rural Commercial Bank Co.,Ltd. Pledgor: ZHEJIANG SHENJI TITANIUM INDUSTRY Co.,Ltd. Registration number: Y2023330002528 |