CN106637266A - Method and apparatus for removing oxides from metal substrate - Google Patents
Method and apparatus for removing oxides from metal substrate Download PDFInfo
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- CN106637266A CN106637266A CN201510713532.4A CN201510713532A CN106637266A CN 106637266 A CN106637266 A CN 106637266A CN 201510713532 A CN201510713532 A CN 201510713532A CN 106637266 A CN106637266 A CN 106637266A
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- Prior art keywords
- boron trifluoride
- metal base
- gas
- oxide
- stream
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Abstract
The invention relates to a method for removing oxides from a metal substrate, wherein the method comprises: providing a boron trifluoride stream, and heating the metal substrate. The invention further relates to a corresponding apparatus.
Description
Technical field
The present invention relates to be used for the method and apparatus for removing oxide from metal base.
Background technology
In many industries, it is required for removing oxide from metal base.For example, in maintenance gas turbine
Before crackle on wing components, it is necessary to first remove oxide from its surface.
The existing method and device from metal base removal oxide is not fully up to expectations.
Accordingly, it would be desirable to the new method and apparatus for removing oxide from metal base.
The content of the invention
On the one hand, embodiments of the invention are related to a kind of method for removing oxide from metal base,
Including：Boron trifluoride stream is provided；And, heat the metal base.
On the other hand, embodiments of the invention are related to a kind of device for removing oxide from metal base,
Including：Source of the gas, it is used for providing boron trifluoride stream；And, firing equipment, it is used to heat the gold
Category base material.
Description of the drawings
Refer to the attached drawing reads detailed description below, can help to understand the feature of the present invention, aspect and excellent
Point, wherein：
Fig. 1 is the method for removing oxide from metal base involved by some embodiments of the present invention
Schematic flow sheet.
The curve map that the weight of potassium fluoborate rises with temperature and changes in 1 as a example by shown in Fig. 2.
In 3 as a example by shown in Fig. 3 the through hole of base material before heating with cleaning after optical microscopic image.
The wall of one end blind bore of Ren é -108 base materials is respectively before heating and clearly in 3 as a example by shown in Fig. 4
SEM sectional view after washing.
The wall of one end blind bore of another Ren é -108 base materials is distinguished before heating in 3 as a example by shown in Fig. 5
With the SEM sectional view after cleaning.
The wall of one end blind bore of GTD-444 base materials is respectively before heating and clearly in 3 as a example by shown in Fig. 6
SEM sectional view after washing.
Specific embodiment
Separately define except clear in non-invention, the implication of the scientific and technical terms used is institute of the present invention
The implication that category those skilled in the art are generally understood that." including ", "comprising" used in the present invention,
" having " or " containing " and similar word referred to except being listed in project thereafter and its equivalent beyond the region of objective existence,
Other projects also can be within scope.
Approximate term in the present invention is used for modifying quantity, represents that the present invention is not limited to the concrete number
Amount, also includes be close to the quantity, change acceptable, that be not result in related basic function
The part of amendment.Accordingly, with " about ", " about ", a numerical value of the modification such as " left and right ", mean
Invention is not limited to the exact numerical.In some embodiments, approximate term likely corresponds to measured value
The precision of instrument.Number range in the present invention can merge and/or exchange, unless separately clearly illustrate,
Number range includes its all numerical value subrange covered.
In the specification and in the claims, unless clearly dictated otherwise, single plural number of all items is not added with
To limit.
Unless the context clearly dictates otherwise, term "or", "or" are not meant to exclusive, and refer to
Presence refers at least one of project (such as material), and the combination including the project that refers to can be deposited
Situation.
Refer in description of the invention " some embodiments " etc., represent described one kind related to the present invention
Specific factor (such as feature, structure and/or feature) is comprised at least one reality described in this specification
In applying example, may or can not possibly come across in other embodiment.In addition, it is necessary to be understood by, described
Bright key element can be combined in any suitable manner.
Hereinafter, embodiments of the present invention are illustrated with reference to the accompanying drawings, will not describe many institute's weeks in detail
The step of knowing, function and structure, to avoid making the present invention seem puzzling because of unnecessary details.
Fig. 1 is the method for removing oxide from metal base involved by some embodiments of the present invention
Schematic flow sheet.Methods described 1 includes：2. boron trifluoride stream is provided；And, 3. heat the Metal Substrate
Material.
The metal base can include any kind of metal material.The metal base can be by metal
Or alloy composition, but it is also possible to containing Non-metallic components.The metal base can include iron, cobalt,
Nickel, aluminium, chromium, titanium or their any combination.In some embodiments, the metal base may include
Stainless steel.
In some embodiments, the metal base includes superalloy, and the superalloy content highest element is
Basic element.The example of basic element includes nickel, cobalt or iron.In other words, the superalloy may include
Ni-based, cobalt-based or iron-based supperalloy.
In some embodiments, the nickel and cobalt of nickel based super alloy including at least 40 percent percentage by weight,
At least one in chromium, aluminium, tungsten, molybdenum, titanium and iron.The example of some nickel based super alloys can be commercial with it
Title acute pyogenic infection of finger tip, for exampleAnd GTD.It is described Ni-based
Superalloy can have each to the monocrystalline for waiting big, directional solidification.In some embodiments, the superalloy can be wrapped
Containing GTD-111, GTD-222, GTD-444,Or In some embodiments, the superalloy includes the chromium less than 10 percentage by weights.
In some embodiments, the cobalt of the cobalt-base superalloy including at least 30 percent percentage by weight with
And at least one in nickel, chromium, aluminium, tungsten, molybdenum, titanium and iron.The example of some cobalt-base superalloys can use
Its commercial designations acute pyogenic infection of finger tip, for exampleWith
In some embodiments, the metal base includes wing components in gas turbine.
The oxide can include any oxide on metal base.In some embodiments, the oxidation
Thing includes the mixture of metal oxide, for example, the mixture of aluminum oxide and chromium oxide.Some embodiments
In, it is difficult to clean up the oxide using conventional method/device.In some embodiments, the oxide
On the surface of the metal base.In some embodiments, the oxide is located to be included such as combustion gas wheel
In machine in the crack of the metal base of wing components etc..In some embodiments, the oxide is located at described
In the various holes of metal base.
Boron trifluoride can by any way be provided from any source of the gas.In some embodiments, the source of the gas
Can be discretely located with the oxide.
In some embodiments, the boron trifluoride stream is produced on the spot by boron trifluoride presoma.The trifluoro
Changing boron presoma can be discretely located with the oxide.The source of the gas may include boron trifluoride presoma.
The source of the gas may include from the boron trifluoride presoma arbitrary equipment for providing boron trifluoride stream.Some realities
In applying example, the source of the gas includes containing the container of the boron trifluoride presoma.It is described in some embodiments
Boron trifluoride presoma is applied on the metal base, but not with the oxide interface.The forerunner
Body can include material, composition or the combination that can arbitrarily provide boron trifluoride.It is described in some embodiments
Presoma includes potassium fluoborate, sodium fluoborate or its any combination.
In some embodiments, the boron trifluoride stream sets from the gas storage/transmission of storage/transmission boron trifluoride
It is standby to provide, such as gas container/gas delivery conduit.Accordingly, the source of the gas may include that gas storage sets
Standby and/or gas delivery equipment.
The boron trifluoride stream can together be provided with inert gas and/or reducibility gas, such as argon gas,
Nitrogen and hydrogen.The boron trifluoride stream can be provided in the vacuum environment that the metal base is located.
In the environment containing boron trifluoride, the metal base is heated for a period of time with firing equipment.Institute
Stating firing equipment may include any equipment that can improve the metal substrate temperature, for example stove, kiln, roasting
Case, torch or its any combination.
The temperature and time of heating can change with the difference of concrete metal base and oxide.Some enforcements
In example, the temperature is the temperature or temperature range that oxide reacts with boron trifluoride.Some enforcements
In example, scope of the temperature at 750 DEG C to 1150 DEG C.In some embodiments, the time is oxidation
During thing reacts with boron trifluoride.In some embodiments, the time is a few hours.
In some embodiments, after a temperature range heats, still there is remaining metal oxide,
Can continue to heat the metal base in other temperature ranges in the environment for having boron trifluoride or use other sides
Formula removes remaining oxide on the metal base.
After a heating treatment, usable acid and/or ultrasonic wave clean the metal base so that after its process
Expose on surface.The acid can be comprising hydrochloric acid, fluosilicic acid, phosphoric acid or its any combination.
Experimental example
Following experimental example can implement the present invention and provide reference for those skilled in the art.These examples are simultaneously
The scope of claim is not limited.
Example 1
About 9.37 milligrams of potassium fluoborates are placed in platinum crucible, are put into thermogravimetric analysis stove.After three exhaust cycles
There is provided about 200 milliliters of lasting argon gas streams per minute to build argon inert gas in the thermogravimetric analysis stove
Atmosphere.Temperature in stove rises to about 950 DEG C from room temperature.
Fig. 2 show the change curve that the weight of potassium fluoborate rises with temperature.As can be seen that fluorine boron
The weight of sour potassium is remarkably decreased in 500 DEG C to 773 DEG C of temperature range.With 773 DEG C before about 500 DEG C
After left and right, the speed of potassium fluoborate weight saving is very slow.This shows potassium fluoborate at 500 DEG C to 773 DEG C
Temperature range decompose.It is for about 53.9% that the weight that measurement is obtained at about 773 DEG C is reduced, this number
It is worth and passes through reaction equation KBF4→KF+BF3Calculated theoretical value, about 54.9%, correspondence.This
Show that boron trifluoride is defined in the decomposition of the potassium fluoborate shown in previous reaction formula.
The gas that thermogravimetric analysis fire grate goes out is absorbed with 0.1 mole per liter of 15 milliliters of sodium hydroxide solution,
To be analyzed with inductively coupled plasma atomic emission spectrometer.The unit of the discharge gas that analysis is obtained
Plain concentration and according to reaction equation KBF4→KF+BF3Calculated concentration of element is listed in the table below 1.
Table 1
| Element | F | B |
| Analytical concentration, μ g/ml | 0.25 | <0.05* |
| Calculate concentration, μ g/ml | 0.28 | 0.05 |
* because the dosage range of thermogravimetric analyzer is limited, the analytical concentration of boron is less than inductively coupled plasma
The Monitoring lower-cut of Atomic Emission Spectrometer AES.
As seen from Table 1, analytical concentration has good correspondence with concentration is calculated.This and above weight saving
Result together, show that boron triflouride gas are defined in the decomposition of potassium fluoborate.
Example 2
One surface have GTD-111, GTD-444 of the oxidation of the oxide skin(coating) of about 50 microns of thickness or
Ren é -108 nickel based super alloy base materials are placed in tube furnace crucible.Three grams of potassium fluoborate with
The base material is separated to be prevented putting, in another crucible in the tube furnace.It is argon in the tube furnace
Atmosphere.
The diamond heating is to 950 DEG C and is kept for 8 hours heat the base material.Then by the base
Material takes out, and 15 minutes are cleaned with the hydrochloric acid of 10% concentration in ultrasonic wave.
It is observed that the oxide skin(coating) on GTD-111 base materials, GTD-444 base materials and Ren é -108 base materials
All get rid of, and underlying metal loss or intercrystalline corrosion do not occur.
Example 3
Three sizes are respectively with Ren é -108 base materials of 1cm x 1cm x 5mm carries out electron discharge processing,
To form the through hole of 1 centimeter length, 500 micron diameters on a base material, on another two base material each
Form one end blind bore of a diameter of 500 micron diameter.One size is 1cm x 1cm x 5mm
GTD-444 nickel based super alloys base material with electron discharge processing method formed 500 micron diameters one end
Blind bore.Oxidation aforementioned substrates, respective hole wall has oxide.Each base material for aoxidizing is placed
In tube furnace.Boron trifluoride stream and argon gas stream are provided in the lump in the tube furnace.
Each the described base material in the tube furnace is heated 8 hours at about 950 DEG C.After the heating, will
The base material takes out from the tube furnace, and cleans 15 points with the hydrochloric acid of concentration 10% in ultrasonic wave
Clock.
Fig. 3 show the through hole of Ren é -108 base materials before heating with cleaning after optical microscopic image, show
Show that the oxide in heating front through hole is completely removed.
Fig. 4 show the SEM sectional view of the wall of one end blind bore of Ren é -108 base materials,
The oxide for showing 23.96 microns of thickness on hole wall before heating is completely removed.Fig. 5 show another
The wall of one end blind bore of Ren é -108 base materials respectively before heating with cleaning after SEM
Sectional view, show before heating on hole wall～oxide of 25 microns of thickness is completely removed.
Fig. 6 show the wall of one end blind bore of GTD-444 base materials respectively before heating with cleaning after
SEM sectional view, show before heating on hole wall～oxide of 20 microns of thickness is completely removed
.
Although describing the present invention in conjunction with the specific embodiments, those skilled in the art can be with
Understand, can be so that many modifications may be made and modification to the present invention.It is therefore contemplated that, claims
The all such modifications being intended in being covered in true spirit of the present invention and scope and modification.
Claims (10)
1. it is a kind of for from metal base remove oxide method, including：
Boron trifluoride stream is provided；And,
Heat the metal base.
2. the method for claim 1, wherein provide boron trifluoride stream include from the oxidation
The boron trifluoride presoma that thing is discretely located provides boron trifluoride stream.
3. the method for claim 1, wherein provide boron trifluoride stream include from gas storage and/
Or transmission equipment provides boron trifluoride stream.
4. the method for claim 1, wherein the heating in 750 DEG C to 1150 DEG C of temperature
Scope.
5. the method for claim 1, wherein the metal base includes superalloy.
6. the method for claim 1, wherein the metal base is included containing less than 10%
The alloy of the chromium of percentage by weight.
7. it is a kind of for from metal base remove oxide device, including：
Source of the gas, it is used for providing boron trifluoride stream；And
Firing equipment, it is used to heat the metal base.
8. device as claimed in claim 7, wherein, the source of the gas includes that gas is stored and/or transmission sets
It is standby.
9. device as claimed in claim 7, wherein, the source of the gas is included from separating with the oxide
The equipment that the boron trifluoride presoma of placement provides boron trifluoride stream.
10. device as claimed in claim 7, wherein, the metal base includes superalloy.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510713532.4A CN106637266A (en) | 2015-10-28 | 2015-10-28 | Method and apparatus for removing oxides from metal substrate |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510713532.4A CN106637266A (en) | 2015-10-28 | 2015-10-28 | Method and apparatus for removing oxides from metal substrate |
Publications (1)
| Publication Number | Publication Date |
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| CN106637266A true CN106637266A (en) | 2017-05-10 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510713532.4A Pending CN106637266A (en) | 2015-10-28 | 2015-10-28 | Method and apparatus for removing oxides from metal substrate |
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Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB863051A (en) * | 1957-09-18 | 1961-03-15 | Aluminum Co Of America | Thermal treatment of articles composed of an aluminum base alloy |
| CN1061806A (en) * | 1990-11-30 | 1992-06-10 | 大同酸素株式会社 | The method of plating steel |
-
2015
- 2015-10-28 CN CN201510713532.4A patent/CN106637266A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB863051A (en) * | 1957-09-18 | 1961-03-15 | Aluminum Co Of America | Thermal treatment of articles composed of an aluminum base alloy |
| CN1061806A (en) * | 1990-11-30 | 1992-06-10 | 大同酸素株式会社 | The method of plating steel |
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Application publication date: 20170510 |