CN105543842A - Wear-resistant and high-temperature-resistant coating formed on surface of titanium alloy and implementation method of coating - Google Patents
Wear-resistant and high-temperature-resistant coating formed on surface of titanium alloy and implementation method of coating Download PDFInfo
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- CN105543842A CN105543842A CN201610008234.XA CN201610008234A CN105543842A CN 105543842 A CN105543842 A CN 105543842A CN 201610008234 A CN201610008234 A CN 201610008234A CN 105543842 A CN105543842 A CN 105543842A
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- 239000011248 coating agent Substances 0.000 title claims abstract description 46
- 238000000576 coating method Methods 0.000 title claims abstract description 46
- 238000000034 method Methods 0.000 title claims abstract description 37
- 229910001069 Ti alloy Inorganic materials 0.000 title claims abstract description 36
- 229910045601 alloy Inorganic materials 0.000 claims abstract description 14
- 239000000956 alloy Substances 0.000 claims abstract description 14
- 239000007772 electrode material Substances 0.000 claims abstract description 13
- 238000003723 Smelting Methods 0.000 claims abstract description 11
- 229910052782 aluminium Inorganic materials 0.000 claims abstract description 9
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims abstract description 9
- 239000000463 material Substances 0.000 claims abstract description 9
- 239000004411 aluminium Substances 0.000 claims abstract description 8
- 238000002360 preparation method Methods 0.000 claims abstract description 4
- 238000002844 melting Methods 0.000 claims description 23
- 230000008018 melting Effects 0.000 claims description 23
- 230000008569 process Effects 0.000 claims description 15
- 239000010949 copper Substances 0.000 claims description 8
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims description 7
- 229910052802 copper Inorganic materials 0.000 claims description 7
- 238000007499 fusion processing Methods 0.000 claims description 7
- 238000003886 thermite process Methods 0.000 claims description 6
- 229910000851 Alloy steel Inorganic materials 0.000 claims description 5
- 238000006243 chemical reaction Methods 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
- 229910000531 Co alloy Inorganic materials 0.000 abstract description 2
- 229910052500 inorganic mineral Inorganic materials 0.000 abstract description 2
- 239000011707 mineral Substances 0.000 abstract description 2
- 238000010892 electric spark Methods 0.000 abstract 2
- 239000003832 thermite Substances 0.000 abstract 1
- 239000010410 layer Substances 0.000 description 8
- 239000010936 titanium Substances 0.000 description 8
- 238000005516 engineering process Methods 0.000 description 6
- 238000005728 strengthening Methods 0.000 description 5
- 239000000758 substrate Substances 0.000 description 4
- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical compound [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 description 3
- 239000003350 kerosene Substances 0.000 description 3
- 238000012545 processing Methods 0.000 description 3
- 229910052719 titanium Inorganic materials 0.000 description 3
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 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
- 229910001315 Tool steel Inorganic materials 0.000 description 2
- 230000008859 change Effects 0.000 description 2
- 230000007797 corrosion Effects 0.000 description 2
- 238000005260 corrosion Methods 0.000 description 2
- 230000006378 damage Effects 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
- 239000002344 surface layer Substances 0.000 description 2
- 238000012935 Averaging Methods 0.000 description 1
- 208000034189 Sclerosis Diseases 0.000 description 1
- 229910000831 Steel Inorganic materials 0.000 description 1
- 238000005299 abrasion Methods 0.000 description 1
- 238000010521 absorption reaction Methods 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 229910052804 chromium Inorganic materials 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000003912 environmental pollution Methods 0.000 description 1
- 230000003203 everyday effect Effects 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 239000002360 explosive Substances 0.000 description 1
- 238000005242 forging Methods 0.000 description 1
- 239000007789 gas Substances 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 238000009413 insulation Methods 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
- 238000003754 machining Methods 0.000 description 1
- 239000012092 media component Substances 0.000 description 1
- 239000000155 melt Substances 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 229910052757 nitrogen Inorganic materials 0.000 description 1
- 238000011017 operating method Methods 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
- 239000002245 particle Substances 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
- 230000000306 recurrent effect Effects 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 239000011863 silicon-based powder Substances 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
- 238000007669 thermal treatment Methods 0.000 description 1
- 238000012546 transfer Methods 0.000 description 1
- 230000009466 transformation Effects 0.000 description 1
- 230000007704 transition Effects 0.000 description 1
- 229910052721 tungsten 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
Abstract
The invention discloses a wear-resistant and high-temperature-resistant coating formed on the surface of a titanium alloy and an implementation method of the coating. An adopted electrode material is 11Cr15Ni25Mo6NMn2, pure aluminium, hard alloy T15K6, hard alloy BK6M or a W-Cr-Co alloy obtained through a thermite method, and the preparation of the surface coating is realized by adopting an electric spark smelting mode on the surface of the titanium alloy of TA15, TC or TC1. By selecting the effective and inexpensive electrode material from raw mineral materials and adopting the electric spark smelting method, the wear-resistant and high-temperature-resistant coating is applied to the surface of the titanium alloy.
Description
Technical field
What the present invention relates to is a kind of technology of alloy surface process field, specifically a kind of titanium alloy surface formed wear-resisting-high-temperaure coating and its implementation.
Background technology
Extensively titanium alloy component is used in Aeronautics and Astronautics, transportation and machine building.Pure titanium has two allotropes: be hexagonal close packed lattice below 882.5 DEG C, be called α-Ti; More than 882.5 DEG C is body centered structure, is called β-Ti, and the thermotolerance of β-Ti is poor, but process plastic is better, is easy to forging.Titanium and titanium alloys has high specific tenacity (strength/density) and excellent corrosion resisting property; Unfortunately have and adhere to sclerosis tendency, so that cause friction destruction, even tear one piece from friction surface.Although titanium alloy resistance toheat is better, more than 500 ~ 600 DEG C, its resistance toheat is just overshadowed, limits its application on friction component.Be oxidized at temperature more than 500 DEG C in order to avoid titanium alloy and improve its wear resisting property, people find out a lot of way, as adopted top coat way, surface is made to stand micro-arc oxidation process, even explosive strengthening in gas thermal treatment, plating and special capacitive energy and other valuable device.
Through finding the retrieval of prior art, Chinese patent literature CN104972188A, open (bulletin) day 2015.10.14, disclose a kind of method utilizing electrical spark to carry out titanium alloy surface modification, comprise funnel, be characterised in that: titanium alloy to be processed is cooled to-100 ~-80 DEG C, in kerosene, electrospark machining is carried out to the titanium alloy workpiece of vibration with Cu base SiC combined electrode, the discharging current of electrical spark is 3 ~ 6A, pulse width is 60 ~ 90 μ s, and the recurrent interval is 5 ~ 7s; Kerosene also mixes the Si powder that particle diameter is 3 ~ 5 μm.But this technology cannot solve the resistance to heat problem of titanium alloy, and hardness improves limited, and wear-resisting being also difficult to meets industrial needs; In addition, the operating method that this technology discharges electrical spark in kerosene can cause environmental pollution; And its service temperature is from-80 ~ 1165 DEG C, the senior general of temperature span directly causes the complicated of facilities and equipments, and the large-scale promotion for technique is implemented to bring difficulty.
Chinese patent literature CN103031509A, open (bulletin) day 2013.04.10, disclose a kind of method adopting high-frequency impulse ion arc technique titanium alloy surface, the method adopts the high-frequency impulse ion arc technology of 2000Hz, using WC as strengthening electrode, prepare TiC strengthening layer at titanium alloy surface.Strengthening layer thickness can reach 0.05mm.But this technology could not reach optimum regime to titanium alloy surface wear resisting property, only use WC material as strengthening electrode; And the resistance to heat problem of titanium alloy surface could not be solved.
Summary of the invention
The present invention is directed to prior art above shortcomings, propose that a kind of titanium alloy surface formed wear-resisting-high-temperaure coating and its implementation, from raw mineral materials, select effective and cheap electrode materials, impose wear-resisting-refractory coating with electrical spark melting method to titanium alloy surface.
The present invention is achieved by the following technical solutions:
The present invention adopts electrode materials be respectively as 11Cr15Ni25Mo6NMn2, fine aluminium, Wimet YT15, YD10 or obtain alloy W-Cr-Co by thermite process, is realized the preparation of top coat at the titanium alloy surface of TA15, TC6 or TC1 by electrical spark melting mode.
Described titanium alloy surface is preferably machined and be ground to surface roughness Ra=0.8 ~ 1.2 μm.
Described titanium alloy surface is preferably coated with the additional copper coating of thick 15 ~ 25 μm further.
Described electrical spark melting, the successive pulse frequency that it adopts is 400 ~ 500Hz, and unit pulse energy is 0.18 ~ 0.32J, and the pulse duration is 40 ~ 100 μ s.
Described method specifically comprises the following steps:
Step 1) machined and be ground to surface roughness Ra=0.8 ~ 1.2 μm, as negative electrode by titanium alloy plate TA15, TC6 or TC1;
Step 2) use output energy to be 0.09 ~ 1.21J, strength of current is the electrical spark melting machine of 0.5 ~ 2.8A, is first coated with copper coating at cathode surface, thick 15 ~ 25 μm; Then arrange anode be respectively as steel alloy electrode 11Cr15Ni25Mo6NMn2, aluminium, Wimet YT15, YD10 or obtain alloy W-Cr-Co by thermite process.
Step 3) adopt electrical spark smelting apparatus, electrical spark fusion process Energy Conversion parameter W is set
ndbe 8.2 ~ 9.6kj/cm
2, unit pulse energy 0.18 ~ 0.32j, successive pulse frequency is 400 ~ 500Hz, pulse duration 40 ~ 100 μ s, thus at target material surface melting thin film.
Described electrical spark fusion process Energy Conversion parameter, is namely forming uniform coating and the final fusion process of laminated coating is corresponding subsequently process parameter value
wherein: C is coefficient, τ is the pulse duration, and x is the dullness effective cube of equattion root in three solutions of following simple cubic equation: x
3-3 (2+Bf
p) x
2+ 3 (1+Bf
p) x+Bf
p-(Bf
p)
3=0, separate as invalid imaginary number for all the other two of this equation; f
pfor spark discharge pulse-repetition, B is pulse interval coefficient.
Described electrical spark smelting apparatus, comprising: be relatively arranged on the negative electrode in vacuum chamber and target, and is arranged at the anode between negative electrode and target.
Described vacuum chamber outside is provided with electromagnetic block.
The present invention relates to a kind of according to aforesaid method prepare wear-resisting-high-temperaure coating, its thickness is 28 ~ 90 μ km, and roughness is 0.8 ~ 3.9 μ km, and degree of compactness is 62 ~ 100%.
The microhardness of described coating is 355 ~ 1642MPa, and specific strength is 1 ~ 4.05, and transport materials coefficient is 0.22 ~ 0.78.
Accompanying drawing explanation
Fig. 1 is electrical spark smelting process process schematic;
In figure: 1 be negative electrode, 2 be anode, 3 be collector, 4 be vacuum chamber, 5 be cathode plasma, 6 be anode plasma, 7 be electromagnetic block, 8 be plasma source, 9 for target;
Fig. 2 is typical negative electrode ∑ △
kwith anode ∑ △
achanges in weight and energy trasfer value Wn relation schematic diagram;
In figure: t
xfor melting layer brittle rupture limit (door), T
xfor critical limit, W that upper layer destroys
nxfor energy limit, the W of brittle rupture
ndfor recommending final electrical spark fusion process Energy Conversion; A is negative electrode, b is anode.
Embodiment
As shown in Figure 1, be the electrical spark smelting apparatus that the present embodiment adopts, be relatively arranged on the negative electrode 1 in vacuum chamber 4 and target 9, and be arranged at the anode 2 between negative electrode 1 and target 9.
Described vacuum chamber 4 outside is provided with electromagnetic block 7.
The present embodiment takes out sample by Titanium alloy TA15, TC6, TC1 respectively, and mechanical workout is also ground to surface roughness Ra=0.8 ~ 1.2 μm.Electrical spark smelting electrode material is followed successively by 11Cr15Ni25Mo6NMn2, fine aluminium, Wimet YT15, YD10 thermite process acquisition alloy W-Cr-Co.
Uniform coating is formed by these materials.In order to ensure at d σ along coat-thickness
xincrease (the σ of mechanical property under/dz > 0 condition
xfor the rupture stress on direction, section, z is vertical section coordinate), before imposing steel alloy coating 11Cr15Ni25Mo6NMn2 and Wimet YT15, YD10 and alloy W-Cr-Co by electrical spark smelting process, be coated with thick 15 ~ 25 μ km and add copper coating.
Under electrical spark melting dynamics research condition, determine positive pole unit corrosion Δ
awith negative pole unit increment Δ
kwith timing relationship.Namely spend in sample 1cm
2institute's quota of expenditure energy on area.In such cases, the processing parameter Dominant energy of process consumes numerical value W
n, namely consume at melting 1cm
2coating energy.In order to each device modular working and use electrode pair, according to individual pulse the average energy value W
pdetermine W
nvalue.Individual pulse average energy directly calculates in the oscillogram of interpole gap electric current and voltage according to obtaining from oscilloscope C8-17.Given energy values is calculated as: W
n=W
pn
pt=W
p(60f
pk
p) t, wherein: N
pfor the average pulse number in 1 minute, t are melting 1cm
2surface-area required time, f
pfor spark discharge pulse-repetition subsequently, K
p=N
p/ f
pfor determining spark pulse transmission probability coefficient.
Sole anode etch value Δ
awith single negative electrode increment Delta
kaccording to gravity determination method: by electrical spark melting per minute process, use and be accurate to 0.0002g weight sensing instrument, calculating total value according to anodic souring (is ∑ △
a) and total negative electrode increment ∑ △
k.Material transition COEFFICIENT K=Δ
k/ △
adetermine the melting of each electrode materials within the set time.
Typical negative electrode ∑ △
kwith anode ∑ △
achanges in weight depends on transfer Energy value W
n(corresponding regulation coat-thickness h conveying capacity value), considers melting 1cm
2surface-area required time converts, and is shown in Fig. 2 a and Fig. 2 b.Obvious, the secondary changes in weight parameter of various electrode is identical.But the difference of quality change value is determined by the element material of electrode and the media components of surrounding, even relevant with the energy parameter of the technological process of electrical spark melting.Provide Fig. 2 a relation, cathode quality change is by the destruction marginal time T of anode surface layer
xlimit.
Processing parameter W has been determined to each electrode pair
ndand preparation, to ensure that negative electrode is maximise speed and to ensure high coating density, its numerical value is as follows.
Table 1 processing parameter W
ndand energy composition
The result of table 2 for implementing to obtain according to above-mentioned parameter, i.e. titanium alloy coating parameter mean value.
Table 2 titanium alloy coating parameter mean value
Wherein: H
μ nfor coating microhardness; H
μ 0for substrate microhardness.
Analytical results proves, adopt Wimet electrode to improve microhardness to greatest extent, and it is the thickest the most closely knit to use alloy tool steel 11Cr15Ni25Mo6AMn2 and W-Cr-Co steel alloy to ensure to obtain coating.As seen from the data in Table 2, between surfaceness and process parameter value, there is relation of interdependence.
X-ray phase analysis electrical spark is smelted rear sample and is shown to there is the melt that α phase is mutually hard with β-Ti, even there is complicated carbide and intermetallic compound (W, Ti, Cr) C at upper layer
1-x, Co
3ti, Al
2o
3with a large amount of TiN.Demonstrate and actively absorb nitrogen in titanium, under electrical spark smelting condition, be separated air, comprise and form TiN, thus form high microhardness surface.
The wear-out life of comparison test, carry out according to GB GB T12444-2006 according to " axle-Wa " series at rubbing machine, use contact pressure 1MPa, be 0.25m/s at unlubricated friction condition lower wall around sample slip speed of rotation, under critical friction condition, even supply No. 20 machine oil as lubricant.The coating of sample watt is tool steel 4X5W2VSi (52-58HRC), and the material of rotating disk axle is the 40Cr hardened, 62-64HRC.Wearing and tearing coating life compares according to uncoated Wear specimens, 5km every day 20km altogether, then weighs.Experiment repetition 5 times.
Determine refractory coating on the micro-weigher of Q-1000 type according to the weight increased under oxidizing condition in atmosphere.Sample heat respectively twice 600 and 700 DEG C, insulation 15h furnace cooling is to room temperature.Thermograph be recorded in oxidation, heat absorption and release impact effect condition under the quality that increases, also upper structural transformation long-pending with specimen surface and move quality and increase relevant.
Table 3 is listed according to sample unit growth weight basic result acquisition friction process feature and refractory coating.
Table 3 coating performance experimental study (averaging)
Having highly dense solid minimum cover thickness has used aluminium electrode to make, but under electrical spark melting condition, forms intermediate compound TiAl to ensure to increase coating heat resistance to greatest extent to 2.3-3.0 doubly.The rate of wear of such coating lower than not having cated sample, but higher than using the coating that obtains of other electrode materials.
Rate of wear during friction under critical lubrication and dry conditions and frictional coefficient and friction area temperature correlation.Lower than the hard alloy coating rate of wear at the W-Cr-Co alloy electrode material using high quality thermite process to obtain, its thickness is 1.4 ~ 1.7 times of hard alloy coating.
Under unlubricated friction condition, titanium alloy coating abrasion speed can be queued up from high to low by quality: Al → YT15 Wimet → 11Cr15Ni25Mo6AMn2 → YD10 Wimet → W-Cr-Co; And under critical lubricating condition: Al → 11Cr15Ni25Mo6AMn2 → YT15 Wimet → YD10 Wimet → W-Cr-Co.
Lining is added when forming copper with electrical spark melting method on surface, thickness reaches 15 ~ 25 μ km, no matter form new electrode materials and Wimet YT15 at coatingsurface, be under critical lubricating condition or under unlubricated friction condition, coating than all have the substrate rate of wear low ~ 30%.
Titanium alloy, under electrical spark melting condition, can see that corrosion-resisting steel, aluminium, Wimet and alloy W-Cr-Co improve the wear-resisting and heating resisting metal of upper layer.Owing to have employed steel alloy 11Cr15Ni25Mo6AMn2 and alloy W-Cr-Co does electrode materials, compared with making electrode materials with Wimet, formed and have 100% density, coat-thickness is increased to 1.5 ~ 3.6 times.
Sample with aluminum coating, improves thermotolerance and can reach 3 times under electrical spark melting condition, and this explains to be exactly form intermediate metal TiAl at its upper layer.
Use copper electrode to form electrical spark melting coated substrate layer, no matter all substrate surface layer friction process features are critical friction condition or unlubricated friction condition, and coating index all improves 30%.
Analytical results proves, electrical spark melting be one effective and fabulous can operating process, allow the electrode materials using various kind widely, greatly improve titanium alloy surface use properties.
Above-mentioned concrete enforcement can carry out local directed complete set to it by those skilled in the art in a different manner under the prerequisite not deviating from the principle of the invention and aim; protection scope of the present invention is as the criterion with claims and can't help above-mentioned concrete enforcement and limit, and each implementation within the scope of it is all by the constraint of the present invention.
Claims (8)
1. the implementation method an of titanium alloy surface is formed wear-resisting-high-temperaure coating, it is characterized in that, employing electrode materials is 11Cr15Ni25Mo6NMn2, fine aluminium, Wimet T15K6, BK6M or obtain alloy W-Cr-Co by thermite process, is realized the preparation of top coat at the titanium alloy surface of TA15, TC6 or TC1 by electrical spark melting mode;
Described electrical spark melting, the successive pulse frequency that it adopts is 400 ~ 500Hz, and unit pulse energy is 0.18 ~ 0.32J, and the pulse duration is 40 ~ 100 μ s.
2. method according to claim 1, is characterized in that, described titanium alloy surface is machined in advance and be ground to surface roughness Ra=0.8 ~ 1.2 μm.
3. method according to claim 1 and 2, is characterized in that, described titanium alloy surface is coated with the additional copper coating of thick 15 ~ 25 μm in advance.
4. method according to claim 1, is characterized in that, specifically comprises the following steps:
Step 1) machined and be ground to surface roughness Ra=0.8 ~ 1.2 μm, as negative electrode by titanium alloy plate TA15, TC6 or TC1;
Step 2) use output energy to be 0.09 ~ 1.21J, strength of current is the electrical spark melting machine of 0.5 ~ 2.8A, is first coated with copper coating at cathode surface, thick 15 ~ 25 μm; Then arrange that anode is steel alloy electrode 11Cr15Ni25Mo6NMn2, aluminium, Wimet T15K6, BK6M or obtain alloy W-Cr-Co by thermite process;
Step 3) adopt electrical spark smelting apparatus, electrical spark fusion process Energy Conversion parameter W is set
ndbe 8.2 ~ 9.6kj/cm
2, unit pulse energy 0.18 ~ 0.32j, successive pulse frequency is 400 ~ 500Hz, pulse duration 40 ~ 100 μ s, thus at target material surface melting thin film.
5. method according to claim 4, is characterized in that, described electrical spark smelting apparatus, comprising: be relatively arranged on the negative electrode in vacuum chamber and target, and is arranged at the anode between negative electrode and target.
6. method according to claim 5, is characterized in that, described vacuum chamber outside is provided with electromagnetic block.
7. method according to claim 4, is characterized in that, described electrical spark fusion process Energy Conversion parameter, is namely forming uniform coating and the final fusion process of laminated coating is corresponding subsequently process parameter value
wherein: C is coefficient, τ is the pulse duration, and x is the dullness effective cube of equattion root in three solutions of following simple cubic equation:
X
3-3 (2+Bf
p) x
2+ 3 (1+Bf
p) x+Bf
p-(Bf
p)
3=0, separate as invalid imaginary number for all the other two of this equation; f
pfor spark discharge pulse-repetition, B is pulse interval coefficient.
8. according to above-mentioned arbitrary claim method prepare wear-resisting-high-temperaure coating, it is characterized in that, its thickness is 28 ~ 90, and roughness is 0.8 ~ 3.9, and degree of compactness is 62 ~ 100%;
The microhardness of described coating is 355 ~ 1642, and specific strength is 1 ~ 4.05, and transport materials coefficient is 0.22 ~ 0.78.
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109321914A (en) * | 2018-11-21 | 2019-02-12 | 北京金轮坤天特种机械有限公司 | A method of the electric spark deposition titanium alloy surface coating under kerosene protection |
| US10245666B2 (en) | 2016-06-30 | 2019-04-02 | General Electric Company | Drilling tool for use in machining a conductive work piece |
| CN112941510A (en) * | 2021-01-26 | 2021-06-11 | 山东大学 | Device and method for preparing high-entropy alloy coating through electric spark deposition |
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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 |
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| CN112941510A (en) * | 2021-01-26 | 2021-06-11 | 山东大学 | Device and method for preparing high-entropy alloy coating through electric spark deposition |
| 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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