CN100560781C - Surface modification method and device, turning unit and fluid machinery - Google Patents
Surface modification method and device, turning unit and fluid machinery Download PDFInfo
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- CN100560781C CN100560781C CNB2006800162264A CN200680016226A CN100560781C CN 100560781 C CN100560781 C CN 100560781C CN B2006800162264 A CNB2006800162264 A CN B2006800162264A CN 200680016226 A CN200680016226 A CN 200680016226A CN 100560781 C CN100560781 C CN 100560781C
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- 238000002715 modification method Methods 0.000 title claims description 16
- 239000012530 fluid Substances 0.000 title claims description 6
- 210000000981 epithelium Anatomy 0.000 claims abstract description 85
- 238000007747 plating Methods 0.000 claims abstract description 61
- 238000005507 spraying Methods 0.000 claims abstract description 61
- 239000002184 metal Substances 0.000 claims abstract description 41
- 238000010438 heat treatment Methods 0.000 claims abstract description 33
- 230000006698 induction Effects 0.000 claims abstract description 31
- 239000000956 alloy Substances 0.000 claims description 14
- 238000002844 melting Methods 0.000 claims description 13
- 229910045601 alloy Inorganic materials 0.000 claims description 9
- 230000035515 penetration Effects 0.000 claims description 7
- 238000010309 melting process Methods 0.000 claims description 6
- 230000035699 permeability Effects 0.000 claims description 4
- 238000001816 cooling Methods 0.000 claims description 2
- 230000007246 mechanism Effects 0.000 claims description 2
- 239000002994 raw material Substances 0.000 claims description 2
- 238000000034 method Methods 0.000 abstract description 19
- 238000005299 abrasion Methods 0.000 abstract description 4
- 239000002002 slurry Substances 0.000 description 18
- 239000000463 material Substances 0.000 description 14
- 239000007789 gas Substances 0.000 description 11
- 230000000052 comparative effect Effects 0.000 description 10
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 9
- 238000010586 diagram Methods 0.000 description 6
- 230000033228 biological regulation Effects 0.000 description 5
- 210000002615 epidermis Anatomy 0.000 description 5
- 230000005855 radiation Effects 0.000 description 5
- 239000004576 sand Substances 0.000 description 5
- 239000007921 spray Substances 0.000 description 5
- 239000000112 cooling gas Substances 0.000 description 4
- 230000004927 fusion Effects 0.000 description 4
- 230000008569 process Effects 0.000 description 4
- 238000004544 sputter deposition Methods 0.000 description 4
- 238000000280 densification Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 239000010985 leather Substances 0.000 description 3
- 238000012423 maintenance Methods 0.000 description 3
- 229910001105 martensitic stainless steel Inorganic materials 0.000 description 3
- 229910001220 stainless steel Inorganic materials 0.000 description 3
- 239000010935 stainless steel Substances 0.000 description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 3
- 229910000831 Steel Inorganic materials 0.000 description 2
- 230000006978 adaptation Effects 0.000 description 2
- 239000000498 cooling water Substances 0.000 description 2
- 238000000151 deposition Methods 0.000 description 2
- 238000002474 experimental method Methods 0.000 description 2
- 238000009434 installation Methods 0.000 description 2
- 239000000155 melt Substances 0.000 description 2
- 230000008018 melting Effects 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- 239000002245 particle Substances 0.000 description 2
- 238000012545 processing Methods 0.000 description 2
- 239000000377 silicon dioxide Substances 0.000 description 2
- 238000007711 solidification Methods 0.000 description 2
- 230000008023 solidification Effects 0.000 description 2
- 239000010959 steel Substances 0.000 description 2
- 238000012360 testing method Methods 0.000 description 2
- 239000003082 abrasive agent Substances 0.000 description 1
- 238000004873 anchoring Methods 0.000 description 1
- 229910001566 austenite Inorganic materials 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 238000005266 casting Methods 0.000 description 1
- 230000015556 catabolic process Effects 0.000 description 1
- 238000006731 degradation reaction Methods 0.000 description 1
- 238000009792 diffusion process Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000005243 fluidization Methods 0.000 description 1
- 230000004907 flux Effects 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 239000007791 liquid phase Substances 0.000 description 1
- 239000000843 powder Substances 0.000 description 1
- 238000004881 precipitation hardening Methods 0.000 description 1
- 238000010791 quenching Methods 0.000 description 1
- 239000000523 sample Substances 0.000 description 1
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- 239000007790 solid phase Substances 0.000 description 1
- 238000005482 strain hardening Methods 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
Images
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
- C23C4/00—Coating by spraying the coating material in the molten state, e.g. by flame, plasma or electric discharge
- C23C4/18—After-treatment
Abstract
On the surface of mother metal (42), form the spraying plating epithelium, this spraying plating epithelium is carried out high-frequency induction heating on one side by remaining on first valve state near the top layer of one side with this spraying plating epithelium, near the top layer lower layer side is melted again, with this spraying plating epithelium driving fit on mother metal (42).According to this method, even have the complex-shaped object being treated of sloping portion, also can successfully on the surface of mother metal, form quality advantages of good abrasion epithelium, can carry out upgrading to the surface.
Description
Technical field
The present invention relates to for example turning unit be carried out the surface modification method of partial resistant surfaces upgrading.
Background technology
For example, contain the impeller of hydraulicefficiency machinerys such as used waterwheel of the water of a large amount of sands or pump for processing, there is early stage problem with regard to being worn in the surface of impeller because of dashed mill by the micropartical of sand in the water.Therefore, covered so following turning units such as impeller that use of environment with anti-abrasive material in the past.As a kind of strong method wherein, have by various spraying plating mode spraying plating self-melting alloy, form wearability spraying plating epithelium, then melt this spraying plating epithelium again, make the densification of spraying plating epithelium, improve the spraying plating method of fusion of the adaptation of spraying plating epithelium and body material simultaneously.
But, carrying out under the situation of surfaction, when the spraying plating epithelium is melted, especially can pour off again, thereby have degradation unfavorable condition under the inhomogeneous or dimensional precision of leather film thickness in the sloping portion deposite metal with the parts of spraying plating method of fusion to complicated shape.
Summary of the invention
The present invention proposes in view of the above fact, and its purpose is to provide a kind of surface modification method and device, even have the complex-shaped object being treated of sloping portion, also can successfully form the good epithelium of quality, and upgrading is carried out on the surface.
According to the 1st mode of the present invention, a kind of surface modification method is provided, even have the complex-shaped object being treated of sloping portion, also can successfully on the mother metal surface, form quality advantages of good abrasion epithelium, can carry out upgrading to the surface.This method has: the operation that forms the spraying plating epithelium on described mother metal surface; This spraying plating epithelium is carried out high-frequency induction heating on one side by remaining on first valve state near the top layer of one side with this spraying plating epithelium, near the lower layer side in described top layer is melted again, thereby with the operation of this spraying plating epithelium driving fit on described mother metal.
As the wearability material that forms this spraying plating epithelium, suitable employing contains the self-melting alloy material of carbide particle or the self-melting alloy material that carbide is separated out by melting and solidification.As method of spray plating, can suit to adopt arc spraying or so electric sputtering process or the such gas sputtering process of flame plating of plasma spray coating.High-frequency induction heating is preferably in the suitable inertness atmosphere carries out.In addition, top layer with spraying plating epithelium near remain on position that first valve state on one side to this spraying plating epithelium carry out high-frequency induction heating on one side, needing not be processing object is the whole surface of mother metal, can be necessary positions such as scarp.
In described melting process again, also can make near the following non-current temperature of raw-material liquidus temperature that maintains described spraying plating epithelium the described top layer.If the following temperature of liquidus temperature, then the spraying plating epithelium just is the admixture of solid phase and liquid phase, is difficult to form fluidization.Because what following temperature of liquidus temperature are suitable in the reality, can be different because of the conditions such as inclination on surface, therefore preferably obtain by experiment.
In described melting process again, also can the near surface of described spraying plating epithelium be remained on below the non-current temperature by the jet surface inertness gas of described spraying plating epithelium being forced cooling.
In described melting process again, this spraying plating epithelium is carried out high-frequency induction heating while also can measure the surface temperature of described spraying plating epithelium.Thus, can infer the near surface of spraying plating epithelium and near the temperature the mother metal, can judge the flowability of spraying plating epithelium and the situation of driving fitization from the surface temperature of spraying plating epithelium.
When described high-frequency induction heating, can be that μ is a specific permeability than resistance [Ω cm] also at ρ, when f is frequency [Hz], use by δ [mm]=5.03 * 10
4* (ρ μ
-1F
-1)
1/2The electric current depth of penetration δ [mm] of expression reaches 2[mm] frequency of following scope carries out high-frequency induction heating.
According to the 2nd mode of the present invention, a kind of surfaction device is provided, even have the object being treated of the complicated shape of sloping portion, also can successfully on the mother metal surface, form quality advantages of good abrasion epithelium, can carry out upgrading to the surface.This surfaction device has: induction heating device, carry out high-frequency induction heating to this spraying plating epithelium of the described mother metal that is formed with the spraying plating epithelium on the surface; With non-currentization of surface mechanism, when carrying out described high-frequency induction heating, cool off near the top layer to described spraying plating epithelium, will remain on first valve state near this top layer.
According to the present invention, owing to only make near the lower side part fusing again in the top layer of spraying plating epithelium, so the spraying plating epithelium holds its shape.So, even sloping portion or complex-shaped part also can prevent to melt flowing, being out of shape or uneven thickness of causing again.Therefore, can successfully form the high high-quality epithelium of dimensional precision.
According to the 3rd mode of the present invention, a kind of turning unit is provided, be formed with the wearability epithelium that forms by above-mentioned surface modification method.On turning unit of the present invention, owing to be formed with the high surfaction epithelium of dimensional precision, so turning unit possesses advantages of good abrasion and as the high-performance of mechanical part.
According to the 4th mode of the present invention, provide a kind of fluid machinery with above-mentioned turning unit.Fluid machinery of the present invention is to be fit to handle the so high-quality fluid machinery of abradability fluidic of slurry.
Above-mentioned purpose of the present invention and other purpose and effect can obtain proof with reference to a preferred implementation of the present invention being example and illustrated accompanying drawing from the explanation of the following stated.
Description of drawings
Fig. 1 is the diagram of the 1st embodiment of expression surfaction device of the present invention.
Fig. 2 is the diagram of the 2nd embodiment of expression surfaction device of the present invention.
Fig. 3 is the diagram of job status of the surfaction device of presentation graphs 2.
Embodiment
Below, with reference to Fig. 1～Fig. 3 embodiments of the present invention are described.
Fig. 1 is the diagram of the 1st embodiment of the expression surfaction device that is used to implement surface modification method of the present invention.The surfaction device possesses: power supply 10, the induction heating device body 12 that is connected with power supply 10, induced current are supplied with cable 14, are formed in the interior output transformer 16 of shell, are connected heater coil 18, the maintenance output transformer 16 on output transformer 16 tops and are carried out the robot device 20 that ability of posture control makes it move along the regulation circuit simultaneously.Induced current is supplied with cable 14, output transformer 16 and heater coil 18 by the water quench of supplying with via junctor 15 from cooling water circulation unit 22.Because induction heating device body 12 and robot device 20 are well-known, therefore omit detailed explanation.This surfaction device is configured in the controlled space that is made as inertness atmosphere gas.
This surfaction device possesses: blow the cooling gas jet apparatus 24 of inertness gas such as Ar and the radiation thermometer 26 that the surface temperature of processed object is measured on remote control ground towards the surface of processed object.Cooling gas jet apparatus 24 has the inertness gas source (gas cylinder) 30 that has variable valve 28 and via air-supply duct 32 connected shower nozzles 34.Shower nozzle 34 for example constitutes lower surface and is formed with the cylinder-shaped of a plurality of jet orifices, in the mode of jet orifice towards the downside of heater coil 18, is installed in via installation parts 36 on the shell of output transformer 16.Radiation thermometer 26 is installed on the shell of output transformer 16 too, and the top end face of its probe 38 is to the processed object of the downside of heater coil 18.
Below, illustrate and adopt the surfaction device of present embodiment to carry out the method that processed object is the surfaction of turning unit.Herein, illustration is carried out method of cold work hardening to the side plate 42 of the impeller 40 of pump shown in Figure 1.
This pump for example is to be used to handle the fluidic pump that contains the such solid substance of slurry, the wearability that its impeller 40 requirements have regulation.Therefore, to the surface of the mother metal (for example martensitic stainless steel) of impeller 40, utilize various spraying plating mode spraying plating self-melting alloy materials and form epithelium.As method of spray plating, can suit to adopt arc spraying or so electric sputtering process or the such gas sputtering process of flame plating of plasma spray coating.
Self-melting alloy is the alloy of forming with respect to regulation, by adding the alloy that the such flux component of B, Si has reduced fusing point, can adopt the alloy of multiple composition according to purposes.In the present embodiment, in order to improve wearability, adopted the self-melting alloy material that contains fine carbide particle or contained the self-melting alloy material that when melting and solidification, can make the composition that carbide separates out.
Iff spraying, because epithelium itself is a porous matter, epithelium and body material be (anchoring) effect driving fit of casting anchor by machinery only, so if apply impact, then might cause epithelium to be peeled off easily.Therefore, melt once more, can make the densification of spraying plating epithelium own, improve closing force simultaneously with body material by making the spraying plating epithelium.This again melt processed can adopt surfaction device shown in Figure 1, carry out in the following manner.
At first, after with object being treated impeller 40 location, under the original state that keeps the disconnection induction heating device, make the teaching of the mobile alignment of robot device's 20 memory heater coils 18.This for example can be by being carried out while guiding the heater coil 18 that keeps in robot device 20 that it is moved along processed by the people.For the interval between heater coil 18 and processed is maintained fixed, be preferably in the suitable anchor clamps of installation on the heater coil 18.Interval between heater coil 18 and processed is preferably 2～4[mm].
Then, as required object being treated is carried out preheating, start cooling water circulation unit 22,, heater coil 18 is moved along the circuit of teaching by robot device 20 by the electric current of induction heating device to heater coil 18 circulation assigned frequencies and regulation electric weight.At this moment, especially under the situation that the epithelium on the position of the surface tilt that makes object being treated melts again, supply with the inertness gases from inertness gas source 30 to shower nozzle 34, it sprayed from jet orifice, with near the temperature maintenance the top layer of spraying plating epithelium in its non-current temperature.Near the top layer temperature controlling shown in the embodiment as shown,,, can be carried out Yi Bian control the translational speed of the electric power or the heater coil 18 of induction heating with radiation thermometer 26 thermometrics more accurately by on one side.
So and since by with the temperature maintenance on surface in its non-current temperature, the surface portion at least of epithelium can not melt again, thereby can avoid epithelium to flow along the inclined-plane, produces the phenomenon of leather film thickness inequality.Therefore, can on required part, form the wearability epithelium fully, and can keep enough dimensional precisioies, thereby can be provided a kind of man-hour of saving mechanical workout, and the final high pump of performance.
In addition, the part for beyond the surface preferably makes epithelium melt fully again, so that carry out and the fusion of mother metal and the densification of epithelium.But, in order to realize the wearability as target, high adaptation, need provide condition by each combination of method of spray plating and depositing materials, set non-current temperature.Thus, can be the diffusion layer that forms by mutual metal diffusing, fusion more than the 5 μ m for example, thereby improve the closing force between deposited metal and mother metal, epithelium can not take place peel off generating thick between spraying plating epithelium and the body material.
In addition, by carrying out high-frequency induction heating with the frequency that is fit to, can utilize epidermis effect concentrated area add between thermospraying epithelium and the body material the interface and near, heating efficiency height, and can also alleviate heat affecting to the body material core.As its value, preferably reach 2[mm by depth of penetration δ with formula (1) expression] below frequency carry out high-frequency induction heating.
Depth of penetration δ [mm]=5.03 * 10
4* (ρ μ
-1F
-1)
1/2(1)
(in the formula, ρ is that μ is a specific permeability than resistance [Ω cm], and f is frequency [Hz])
Depth of penetration δ reaches 2[mm] following frequency for example in austenite stainless steel at 50[kHz] more than, in martensitic stainless steel at 0.05[kHz] more than, in ferrite-group stainless steel at 0.02[kHz] more than, in the precipitation hardening stainless steel at 0.5[kHz] more than.
Fig. 2 is the diagram of the surfaction device of expression the 2nd embodiment of the present invention, comprising the cooling gas jet apparatus 24 that induced current supplies with the induction heating device of cable 14, output transformer 16 and heater coil 18 and contained gas supply-pipe 32, shower nozzle 34 is not mounted on the robot device 20, and be mounted on the balance arm 50, so that can be easy to manual operation.This balance arm 50 is frameworks of strip, is used to keep induced current to supply with cable 14, in front output transformer 16, heater coil 18 and shower nozzle 34 is installed simultaneously, in rear end side balance counterweight 52 is installed.The balance arm 50 shaft supporting part 54 places swing of portion in the central is installed on the lower end of the support component 56 that hangs down from top freely.
Fig. 3 illustrates the surface-treated method that the surfaction device of this embodiment is used in impeller 40.The operator hands balance arm 50, at first, is slided in the upper end of support component 56 along track 58, moves it the appropriate location of impeller 40 tops.Then, operating spring scale 60, adjust the height location of support component 56, make balance arm 50 swings, thereby as one man adjust the position or the angle of heater coil with the treating part, with previous situation similarly, on one side spray the inertness gases from shower nozzle 34, electric power from induction heating to heater coil 18 that supply with melts the epithelium on surface more on one side.In this method, do not use expensive robot device 20, also can carry out operation.
(embodiment)
Below, the embodiment of method of the present invention is implemented on illustrative experiment ground.
The material of mother metal: martensitic stainless steel (13Cr-4Ni)
(embodiment 06 and comparative example 05 are 200 * 200 * t20) to mother metal size: 200 * 200 * t30
Depositing materials: adopted Ni base self-melting alloy, contain Ni base self-melting alloy, the Co base self-melting alloy of carbide and contained W
26 kinds on the steel wire of C pulverized powder (3 kinds) etc.
Method of spray plating: adopt 3 kinds of flame plating, arc spraying and plasma spray coatings etc.
Spraying plating leather film thickness: 0.15～1.011mm
Heating condition
Distance between coil/mother metal: 1.5～4mm
Induction heating power: 13kW, 20kW
Induction heating frequency: 19kHz, 80kHz
Depth of penetration δ: 0.05mm, 0.1mm
While using radiation thermometer thermometric induction heating, maintain non-current temperature in an embodiment respectively, in comparative example, make also fusing again of top layer.
Table 1 is listed implementation condition with gathering.
Respectively embodiment and comparative example have been measured hardness.In addition, several embodiment and comparative example have been carried out the resistant to slurry test.Test conditions is, the slurry that makes No. 9, the silica sand that contains concentration 1% is that 90 °, flow velocity are impact specimen under the condition of 40m/s in angle, calculates the rate of wear.Table 2 is listed test-results with gathering.
Table 2
| Add thermal result | |
| Embodiment 01 | Epithelium hardness Hv430. |
| Embodiment 02 | Epithelium hardness Hv832. |
| Embodiment 03 | Epithelium hardness Hv716. |
| Embodiment 04 | Epithelium hardness Hv844. |
| Embodiment 05 | Epithelium hardness Hv560.The fusing of body material epidermis. |
| Embodiment 06 | Epithelium hardness Hv805.Resistant to slurry: 218.0[μ m/h].Mother metal is than 3.14 times. |
| Embodiment 07 | Epithelium hardness Hv713.Resistant to slurry: 286.5[μ m/h].Mother metal is than 2.39 times.The fusing of mother metal epidermis. |
| Embodiment 08 | Epithelium hardness Hv597.Resistant to slurry: 138.5[μ m/h].Mother metal is than 4.94 times.The fusing of mother metal epidermis. |
| Embodiment 09 | Resistant to slurry: 94.3[μ m/h].Mother metal is than 7.3 times. |
| |
Resistant to slurry: 122[μ m/h].Mother metal is than 5.6 times. |
| Embodiment 11 | Resistant to slurry: 113.5[μ m/h].Mother metal is than 6.0 times. |
| |
Resistant to slurry: 429[μ m/h].Mother metal is than 1.6 times. |
| Embodiment 13 | Resistant to slurry: 381[μ m/h].Mother metal is than 1.8 times. |
| |
Resistant to slurry: 83[μ m/h].Mother metal is than 8.3 times. |
| |
Resistant to slurry: 93.8[μ m/h].Mother metal is than 7.3 times. |
| |
Resistant to slurry: 76.5[μ m/h].Mother metal is than 8.95 times. |
| Embodiment 17 | Resistant to slurry: 340[μ m/h].Mother metal is than 2 times. |
| |
Resistant to slurry: 133.5[μ m/h].Mother metal is than 5.13 times. |
| Comparative example 01 | Epithelium hardness Hv412.The body material fusing. |
| Comparative example 02 | Epithelium hardness Hv902.The fusing of body material epidermis. |
| Comparative example 03 | Epithelium hardness Hv654.The body material fusing. |
| Comparative example 04 | Epithelium hardness Hv422. |
| Comparative example 05 | Epithelium hardness Hv817. |
Sand concentration: 1%
Sand: No. 9, silica sand
The resistant to slurry of mother metal: 684.62[μ m/h].Mother metal is than 1.0 times.
Draw from these results, embodiment demonstrates the performance outstanding than comparative example.Therefore, be appreciated that the method for the present invention of utilizing,, also can form the uniform wearability epithelium of thickness in high operation ground even for the object being treated of complicated shape.
More than diagram and illustrated preferred embodiment of the present inventionly but should be appreciated that under the situation that does not break away from the claim scope, can carry out numerous variations and improvement.
The present invention can be used in the surface modification method that turning unit is carried out local resistant surfaces upgrading.
Claims (9)
1. a surface modification method is the surface modification method that forms the wearability epithelium on the surface of mother metal, and it has:
Form the operation of spraying plating epithelium on the surface of described mother metal, described spraying plating epithelium is the self-melting alloy epithelium;
By on one side remaining on first valve state near the top layer with this spraying plating epithelium, on one side this spraying plating epithelium is carried out high-frequency induction heating, near the lower layer side the described top layer is melted again, thereby with the operation of this spraying plating epithelium driving fit on described mother metal.
2. surface modification method as claimed in claim 1 wherein, in described melting process again, makes near the following non-current temperature of raw-material liquidus temperature that maintains described spraying plating epithelium the described top layer.
3. surface modification method as claimed in claim 2 wherein, in described melting process again, by to described spraying plating epithelium jet surface inertness gas and forcibly cooling, remains on below the non-current temperature near making the top layer of described spraying plating epithelium thus.
4. as any one the described surface modification method in the claim 1～3, wherein, in described melting process again, Yi Bian measure the surface temperature of described spraying plating epithelium, Yi Bian this spraying plating epithelium is carried out high-frequency induction heating.
5. as any one the described surface modification method in the claim 1～3, wherein, when described high-frequency induction heating, for than resistance [Ω cm], μ being specific permeability, f when being frequency [Hz], use by δ [mm]=5.03 * 10 at ρ
4* (ρ μ
-1F
-1)
1/2The electric current depth of penetration δ [mm] of expression reaches 2[mm] frequency of following scope carries out high-frequency induction heating.
6, surface modification method as claimed in claim 4 wherein, when described high-frequency induction heating,, is used by δ [mm]=5.03 * 10 for than resistance [Ω cm], μ being specific permeability, f when being frequency [Hz] at ρ
4* (ρ μ
-1F
-1)
1/2The electric current depth of penetration δ [mm] of expression reaches 2[mm] frequency of following scope carries out high-frequency induction heating.
7. a turning unit wherein, is formed with the wearability epithelium with any one the described surface modification method in the claim 1～6.
8. fluid machinery, it has the described turning unit of claim 7.
9. a surfaction device is the surfaction device that is used for forming the wearability epithelium on the surface of mother metal, and it has:
Induction heating device carries out high-frequency induction heating to this spraying plating epithelium of the described mother metal that is formed with the spraying plating epithelium on the surface;
Surface non-currentization mechanism when carrying out described high-frequency induction heating, cools off near the top layer of described spraying plating epithelium, will remain on first valve state near this top layer.
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| JP2005140401 | 2005-05-12 | ||
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| JP5507734B1 (en) * | 2013-04-22 | 2014-05-28 | 東洋精鋼株式会社 | Equipment holding device |
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| JPS52136845A (en) * | 1976-05-12 | 1977-11-15 | Nippon Steel Corp | Method of forming anticorrosive film on surface of stainless steel products |
| JPS57169078A (en) * | 1981-04-08 | 1982-10-18 | Mitsubishi Heavy Ind Ltd | Modifying method for material surface |
| JPS61136666A (en) * | 1984-12-07 | 1986-06-24 | Hitachi Zosen Corp | Treatment of thermal sprayed film |
| JPH04128359A (en) * | 1990-09-17 | 1992-04-28 | Mitsubishi Heavy Ind Ltd | Formation of thermally sprayed metal film |
| JP3001363B2 (en) * | 1993-12-27 | 2000-01-24 | 第一高周波工業株式会社 | Method of forming metal spray coating |
| JPH07278778A (en) * | 1994-04-08 | 1995-10-24 | Mitsubishi Heavy Ind Ltd | Production of wear resistant heat transfer pipe |
| JP3573590B2 (en) * | 1997-03-19 | 2004-10-06 | 株式会社 日立インダストリイズ | Centrifugal pump |
| JP3204637B2 (en) * | 1998-01-29 | 2001-09-04 | トーカロ株式会社 | Manufacturing method of self-fluxing alloy spray-coated member |
| JP4058294B2 (en) * | 2002-04-30 | 2008-03-05 | 株式会社荏原製作所 | Wear-resistant surface treatment method for rotating member, impeller, and fluid machine having the impeller |
| JP4040991B2 (en) * | 2003-02-27 | 2008-01-30 | 三ツ星ベルト株式会社 | Polyamide resin molded body with core material and method for producing the same |
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|---|---|
| WO2006120987A1 (en) | 2006-11-16 |
| CN101175865A (en) | 2008-05-07 |
| JPWO2006120987A1 (en) | 2008-12-18 |
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