CN112872706A - Rotary kiln riding wheel and wheel belt damage repairing method - Google Patents
Rotary kiln riding wheel and wheel belt damage repairing method Download PDFInfo
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- CN112872706A CN112872706A CN202110045168.4A CN202110045168A CN112872706A CN 112872706 A CN112872706 A CN 112872706A CN 202110045168 A CN202110045168 A CN 202110045168A CN 112872706 A CN112872706 A CN 112872706A
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23P—METAL-WORKING NOT OTHERWISE PROVIDED FOR; COMBINED OPERATIONS; UNIVERSAL MACHINE TOOLS
- B23P6/00—Restoring or reconditioning objects
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C19/00—Alloys based on nickel or cobalt
- C22C19/03—Alloys based on nickel or cobalt based on nickel
- C22C19/05—Alloys based on nickel or cobalt based on nickel with chromium
- C22C19/051—Alloys based on nickel or cobalt based on nickel with chromium and Mo or W
- C22C19/056—Alloys based on nickel or cobalt based on nickel with chromium and Mo or W with the maximum Cr content being at least 10% but less than 20%
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C19/00—Alloys based on nickel or cobalt
- C22C19/03—Alloys based on nickel or cobalt based on nickel
- C22C19/05—Alloys based on nickel or cobalt based on nickel with chromium
- C22C19/051—Alloys based on nickel or cobalt based on nickel with chromium and Mo or W
- C22C19/057—Alloys based on nickel or cobalt based on nickel with chromium and Mo or W with the maximum Cr content being less 10%
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- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
- C23C10/00—Solid state diffusion of only metal elements or silicon into metallic material surfaces
- C23C10/28—Solid state diffusion of only metal elements or silicon into metallic material surfaces using solids, e.g. powders, pastes
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- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
- C23C24/00—Coating starting from inorganic powder
- C23C24/08—Coating starting from inorganic powder by application of heat or pressure and heat
- C23C24/10—Coating starting from inorganic powder by application of heat or pressure and heat with intermediate formation of a liquid phase in the layer
- C23C24/103—Coating with metallic material, i.e. metals or metal alloys, optionally comprising hard particles, e.g. oxides, carbides or nitrides
- C23C24/106—Coating with metal alloys or metal elements only
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P10/00—Technologies related to metal processing
- Y02P10/20—Recycling
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Pressure Welding/Diffusion-Bonding (AREA)
- Polishing Bodies And Polishing Tools (AREA)
Abstract
The invention provides a rotary kiln riding wheel and a wheel belt damage repairing method, which specifically comprises the following steps: firstly, polishing the wound surface of a riding wheel or a wheel belt to be repaired to expose a metallic luster surface, punching the metallic luster surface, embedding a metal rod, sequentially welding the metallic luster surface to form a bonding layer, a transition layer and a working layer, and finally grinding the working layer to enable the working layer to be consistent with the original shape of the riding wheel or the wheel belt, thereby obtaining the repaired riding wheel or wheel belt. Compared with the conventional welding repair, the metal rod is added to connect the original workpiece and the welding repair material, the contact area between the workpiece and the welding repair material is increased, and meanwhile, the welding repair material is of a multilayer structure, so that the welding repair material is reasonable in structure, better in performance and good in application prospect.
Description
Technical Field
The invention relates to the technical field of equipment maintenance, in particular to a rotary kiln riding wheel and a wheel belt damage repairing method.
Background
The rotary kiln is used as an important device for cement production, and needs to work under the conditions of long-term high temperature and high load, a cylinder body of the rotary kiln is supported or driven by a wheel belt and a supporting wheel and bears extremely high pressure, the supporting wheel and the wheel belt are in gear transmission, the key of the successful transmission of the gears is not only dependent on the form of the gears, and the used materials, installation, maintenance, lubrication and the like are very important. The carrying of the rotary kiln and the wheel belt are large in size, the working condition environment is severe, good sealing cannot be achieved, the mixing of dust and other impurities can damage the driving wheel and the driven wheel, and problems such as pitting corrosion, peeling, step tooth burning and the like of the tooth surface are caused, so that a repair solution needs to be provided. However, the supporting roller and the wheel belt of the rotary kiln are extremely large in size and not easy to mount and dismount, so that the defects cannot be repaired through machining equipment, and can only be compensated in an online maintenance mode.
Disclosure of Invention
In view of the above, the invention provides a rotary kiln riding wheel with a more stable welding repair effect and a wheel belt damage repair method.
The technical scheme of the invention is realized as follows: the invention provides a rotary kiln riding wheel and a wheel belt damage repairing method, which comprises the following steps:
polishing the wound surface of a riding wheel or a wheel belt to be repaired, removing rust spots and oil stains on the wound surface, and exposing a metal glossy surface;
step two, punching the metal luster surface, embedding a metal rod which is made of the same material as the riding wheel or the wheel belt to be repaired into the hole, and performing interference fit on the metal rod and the hole;
thirdly, depositing a bonding layer material on the metallic luster surface, obtaining a bonding layer after deposition, and polishing the surface of the bonding layer;
fourthly, depositing a transition layer material on the surface of the bonding layer, obtaining a transition layer after deposition, and polishing the surface of the transition layer;
and fifthly, depositing a working layer material on the surface of the transition layer, obtaining the working layer after deposition, and grinding the working layer to enable the working layer to be consistent with the original shape of the riding wheel or the wheel belt.
On the basis of the above technical solution, preferably, in the second step, the punching process includes performing array punching on the metallic luster surface, where the distance between two adjacent holes is 5-10cm, and the hole diameter is 5-20 mm.
On the basis of the above technical solution, preferably, in the second step, one end of the metal rod inserted into the hole is subjected to threading treatment, and the metal rod is inserted into the hole in a rotating manner.
On the basis of the above technical solution, preferably, the surface of the metal rod is subjected to ion-impregnation treatment, and the ion-impregnation treatment method includes: removing rust and an oxide layer on the surface of the metal rod, then placing the metal rod in a vacuum container, keeping the pressure in the vacuum container at 10-100Pa, keeping the atmosphere in the vacuum container at argon, heating the metal rod to 900 ℃ at 800-.
Still more preferably, the bonding layer material is an alloy powder of pearlite material, which includes 0.5-1.5% by mass of boron, 0.05-0.1% by mass of carbon, 2.5-3.2% by mass of manganese, 10-12% by mass of chromium, 0.4-0.6% by mass of molybdenum, and the balance of nickel, calculated as 100% by mass.
On the basis of the technical scheme, preferably, the transition layer material is alloy powder, and comprises, by mass, 0.25-0.65% of tungsten, 2-4% of molybdenum, 1.5-3% of vanadium, 0.3-0.4% of carbon, 1-1.5% of chromium and the balance of nickel, wherein the alloy powder is calculated by taking the mass percent as 100%.
On the basis of the technical scheme, preferably, the working layer is made of alloy powder, and comprises, by mass, 100% of chromium 3-5%, titanium 0.1-0.2%, manganese 0.5-1.5%, tungsten 0.3-0.6%, carbon 0.02-0.06%, molybdenum 0.1-0.15% and the balance nickel.
On the basis of the above technical solution, preferably, the thickness of the bonding layer is 0.2 to 0.5 mm.
On the basis of the technical scheme, preferably, the thickness of the transition layer is 40-60% of the depth of a pit left after the wound surface is polished.
On the basis of the technical scheme, preferably, the thickness of the working layer is 40-60% of the depth of a pit left after the wound surface is polished.
Compared with the prior art, the rotary kiln tug and the wheel belt damage repairing method have the following beneficial effects:
(1) according to the repairing method, on the basis of a conventional welding repair technology, a workpiece to be repaired is connected with a welding repair material layer by using a metal bar, so that the contact area between the welding repair material and the workpiece to be repaired is indirectly increased, the connection strength between the welding repair material and the workpiece to be repaired is enhanced, then a bonding layer, a transition layer and a working layer are respectively adopted for deposition treatment, the bonding layer can enhance the bonding force between the transition layer and the surface of the original workpiece, hot cracks and cold cracks are effectively prevented from being generated, the transition layer solves the mutual friction, impact load friction, particle friction and loose stress between metal and metal, the overall strength and hardness of the welding repair material are increased, and the working layer has higher wear resistance, thermal corrosion resistance and fatigue resistance;
(2) in order to further prevent the welding material layer from falling off, the invention carries out surface modification on the metal rod for connection, and the surface of the metal rod is rougher in an ion infiltration treatment mode, so that the contact area with the welding material is increased, and meanwhile, the bonding force between the alloy surface layer formed by infiltration and the welding material is higher.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be obtained by a person skilled in the art without any inventive step based on the embodiments of the present invention, are within the scope of the present invention.
Example 1
The method is used for repairing a supporting wheel of a certain cement rotary kiln in Miscany city, and the surface of the supporting wheel is broken down, and the repairing method is adopted for on-site repairing:
polishing the chipping surface of a supporting wheel to be repaired, polishing rusty spots on the surface of a wound by using a grinding wheel, cleaning the whole surface of the wound by using alkali liquor after polishing is finished, and then washing the whole surface of the wound by using methanol until the surface of the wound is exposed with metallic luster, wherein the depth of the surface of the wound is about 8 mm;
the wound surface after the clearance of polishing is punched, utilizes the drill bit to punch, and rectangular array bores the hole interval and is 5cm, and the aperture is 5mm, and the hole depth is 15 mm's counter bore, and through detecting, it is ZG55 steel to correspond the riding wheel, and the iron bar embedding that adopts ZG55 steel preparation is in the counter bore, the diameter of iron bar is 5.5mm, and length is 20 mm.
After embedding, a binding layer with the thickness of about 0.2mm is deposited on a wound surface, the binding layer is formed by depositing pearlite alloy powder consisting of 0.5 percent of boron, 0.05 percent of carbon, 2.5 percent of manganese, 10 percent of chromium, 0.4 percent of molybdenum and the balance of nickel through an acid welding wire, the surface of the binding layer is polished and cleaned, then a transition layer with the thickness of about 3.2mm is deposited on the surface of the binding layer, the transition layer is formed by depositing alloy powder consisting of 0.25 percent of tungsten, 2 percent of molybdenum, 1.5 percent of vanadium, 0.3 percent of carbon, 1 percent of chromium and the balance of nickel, after the surface of the transition layer is polished and cleaned, a working layer with the thickness of about 4.8mm is deposited on the surface of the transition layer, the working layer is formed by depositing alloy powder consisting of 3 percent of chromium, 0.1 percent of titanium, 0.5 percent of manganese, 0.3 percent of tungsten, 0.02 percent of carbon, 0.1 percent of molybdenum and the balance of nickel, and the surface of the working layer is mechanically processed, the shape of the supporting roller is matched with that of the surface of the supporting roller, and the repaired supporting roller is obtained.
Example 2
The wheel belt of a certain cement rotary kiln in the gourd island city is repaired, cracks appear on the surface of the wheel belt, and the repairing method is adopted for on-site repair:
polishing a crack surface of a wheel belt to be repaired, polishing a crack area by using a grinding wheel until a wound surface has no cracks or rust, cleaning the whole wound surface by using alkali liquor after polishing is finished, and then washing the wound surface by using methanol until the wound surface is exposed with metallic luster, wherein the depth of the wound surface is about 10 mm;
the wound surface after the clearance of polishing is punched, utilizes the drill bit to punch, and rectangular array bores the hole interval and is 10cm, and the aperture is 20mm, and the hole depth is 50 mm's counter bore, and through detecting, it is ZG35 steel to correspond the tyre, and the iron bar embedding that adopts ZG35 steel preparation is in the counter bore, the diameter of iron bar is 21mm, and length is 60 mm.
Before embedding, the iron rod is subjected to ion infiltration treatment, and the treatment process comprises the following steps: polishing with abrasive paper to remove rust and an oxide layer on the surface, placing an iron rod in a vacuum container, keeping the pressure in the vacuum container at 10Pa, filling argon atmosphere in the vacuum container, heating the iron rod to 800 ℃, starting a nickel-molybdenum alloy source electrode, increasing the voltage of the nickel-molybdenum alloy source electrode to 950V, connecting the metal rod to a cathode, increasing the voltage of the cathode to 400V, performing heat preservation for 6h to obtain the metal rod subjected to ion infiltration treatment, and embedding the metal rod subjected to the infiltration treatment in a counter bore.
After embedding, a binding layer with the thickness of about 0.5mm is deposited on a wound surface, the binding layer is formed by depositing pearlite alloy powder consisting of 1% of boron, 0.07% of carbon, 3% of manganese, 11% of chromium, 0.5% of molybdenum and the balance of nickel through an acid welding wire, the surface of the binding layer is polished and cleaned, then a transition layer with the thickness of about 6mm is deposited on the surface of the binding layer, the transition layer is formed by depositing alloy powder consisting of 0.45% of tungsten, 3% of molybdenum, 2% of vanadium, 0.35% of carbon, 1.2% of chromium and the balance of nickel, after the surface of the transition layer is polished and cleaned, a working layer with the thickness of about 4mm is deposited on the surface of the transition layer, the working layer is formed by depositing alloy powder consisting of 4% of chromium, 0.15% of titanium, 1% of manganese, 0.4% of tungsten, 0.04% of carbon, 0.12% of molybdenum and the balance of nickel, and the surface of the working layer is mechanically processed, the wheel belt is matched with the surface shape of the wheel belt to obtain the repaired wheel belt.
Example 3
The wheel belt of a certain cement rotary kiln in Zhangye City is repaired, and the surface of the wheel belt is peeled off and chipped, and the repairing method of the invention is adopted for on-site repairing:
polishing a stripping and chipping area of a wheel belt to be repaired, polishing the stripping and chipping area by using a grinding wheel until the wound surface has no cracks or rust, cleaning the whole wound surface by using alkali liquor after polishing is finished, and then washing the whole wound surface by using methanol until the wound surface is exposed with metallic luster, wherein the depth of the wound surface is about 10 mm;
the surface of a wound after the clearance of polishing is punched, utilizes the drill bit to punch, and rectangular array bores the hole interval and is 8cm, and the aperture is 10mm, and the hole depth is 30 mm's counter bore, and through detecting, it is ZG35 steel to correspond the tyre, and the iron bar embedding that adopts ZG35 steel preparation is in the counter bore, the diameter of iron bar is 11mm, and length is 40 mm.
Before embedding, the iron rod is subjected to ion infiltration treatment, and the treatment process comprises the following steps: polishing with abrasive paper to remove rust and an oxide layer on the surface, placing an iron rod in a vacuum container, keeping the pressure in the vacuum container at 100Pa, filling argon atmosphere in the vacuum container, heating the iron rod to 900 ℃, starting a nickel-molybdenum alloy source electrode, saving the voltage of the nickel-molybdenum alloy source electrode by 1000V, connecting the metal rod to a cathode, raising the voltage of the cathode to 500V, performing heat preservation for 1h to obtain the iron rod subjected to ion infiltration treatment, performing threading treatment on the surface of the iron rod subjected to the infiltration treatment, and rotatably embedding the metal rod subjected to the infiltration treatment in a counter bore.
After embedding, a binding layer with the thickness of about 0.3mm is deposited on a wound surface, the binding layer is formed by depositing pearlite alloy powder consisting of 1.5% of boron, 0.1% of carbon, 3.2% of manganese, 12% of chromium, 0.6% of molybdenum and the balance of nickel through an acid welding wire, the surface of the binding layer is polished and cleaned, then a transition layer with the thickness of about 5mm is deposited on the surface of the binding layer, the transition layer is formed by depositing alloy powder consisting of 0.65% of tungsten, 4% of molybdenum, 3% of vanadium, 0.4% of carbon, 1.5% of chromium and the balance of nickel, after the surface of the transition layer is polished and cleaned, a working layer with the thickness of about 5mm is deposited on the surface of the transition layer, the working layer is formed by depositing alloy powder consisting of 5% of chromium, 0.2% of titanium, 1.5% of manganese, 0.6% of tungsten, 0.06% of carbon, 0.15% of molybdenum and the balance of nickel, and the surface of the working layer is mechanically processed, the wheel belt is matched with the surface shape of the wheel belt to obtain the repaired wheel belt.
In the embodiment, the repaired riding wheel and the repaired wheel belt work normally in the equipment for more than 2 years, the repaired parts have no cracks, peeling, chipping and the like, the welded parts and the metal bar connecting parts have no defects by adopting ultrasonic flaw detection inspection, the hardness of the welded parts is basically consistent with that of the original matrix by using a hardness tester, and the error is HB 2-6.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents, improvements and the like that fall within the spirit and principle of the present invention are intended to be included therein.
Claims (10)
1. A rotary kiln riding wheel and wheel belt damage repairing method is characterized by comprising the following steps:
polishing the wound surface of a riding wheel or a wheel belt to be repaired, removing rust spots and oil stains on the wound surface, and exposing a metal glossy surface;
step two, punching the metal luster surface, embedding a metal rod which is made of the same material as the riding wheel or the wheel belt to be repaired into the hole, and performing interference fit on the metal rod and the hole;
thirdly, depositing a bonding layer material on the metallic luster surface, obtaining a bonding layer after deposition, and polishing the surface of the bonding layer;
fourthly, depositing a transition layer material on the surface of the bonding layer, obtaining a transition layer after deposition, and polishing the surface of the transition layer;
and fifthly, depositing a working layer material on the surface of the transition layer, obtaining the working layer after deposition, and grinding the working layer to enable the working layer to be consistent with the original shape of the riding wheel or the wheel belt.
2. The rotary kiln riding wheel and wheel belt damage repairing method as claimed in claim 1, wherein in the second step, the punching process comprises array punching on the metal luster surface, the distance between two adjacent holes is 5-10cm, and the hole diameter is 5-20 mm.
3. The rotary kiln riding wheel and wheel belt damage repairing method as claimed in claim 1, wherein in the second step, one end of the metal bar inserted into the hole is threaded, and the metal bar is inserted into the hole in a rotating manner.
4. The rotary kiln riding wheel and wheel belt damage repairing method as claimed in claim 1, wherein the surface of the metal bar is subjected to ion-impregnation treatment, and the ion-impregnation treatment method comprises: removing rust and an oxide layer on the surface of the metal rod, then placing the metal rod in a vacuum container, keeping the pressure in the vacuum container at 10-100Pa, keeping the atmosphere in the vacuum container at argon, heating the metal rod to 900 ℃ at 800-.
5. The rotary kiln riding wheel and wheel belt damage repairing method as claimed in claim 1, wherein the bonding layer material is an alloy powder of pearlite material, which comprises 0.5-1.5% by mass of boron, 0.05-0.1% by mass of carbon, 2.5-3.2% by mass of manganese, 10-12% by mass of chromium, 0.4-0.6% by mass of molybdenum, and the balance of nickel, calculated as 100% by mass.
6. The rotary kiln riding wheel and wheel belt damage repairing method as claimed in claim 1, wherein the transition layer material is alloy powder, and comprises, by mass, 0.25-0.65% of tungsten, 2-4% of molybdenum, 1.5-3% of vanadium, 0.3-0.4% of carbon, 1-1.5% of chromium, and the balance of nickel, calculated as 100%.
7. The rotary kiln riding wheel and wheel belt damage repairing method as claimed in claim 1, wherein the working layer material is alloy powder, and comprises, by mass, 100% of chromium 3-5%, titanium 0.1-0.2%, manganese 0.5-1.5%, tungsten 0.3-0.6%, carbon 0.02-0.06%, molybdenum 0.1-0.15%, and balance nickel.
8. The rotary kiln riding wheel and wheel belt damage repairing method as claimed in claim 1, wherein the thickness of the bonding layer is 0.2-0.5 mm.
9. The rotary kiln riding wheel and rim damage repairing method as claimed in claim 8, wherein the thickness of the transition layer is 40-60% of the depth of the pit left after the wound surface is ground.
10. The rotary kiln riding wheel and rim damage repairing method as claimed in claim 9, wherein the thickness of the working layer is 40-60% of the depth of the pit left after the wound surface is ground.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110045168.4A CN112872706B (en) | 2021-01-13 | 2021-01-13 | Rotary kiln riding wheel and wheel belt damage repairing method |
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| CN202110045168.4A CN112872706B (en) | 2021-01-13 | 2021-01-13 | Rotary kiln riding wheel and wheel belt damage repairing method |
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| CN112872706A true CN112872706A (en) | 2021-06-01 |
| CN112872706B CN112872706B (en) | 2023-03-31 |
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| CN1590570A (en) * | 2003-09-05 | 2005-03-09 | 海恩斯国际公司 | Age-hardenable, corrosion resistant ni-cr-mo alloys |
| CN102294568A (en) * | 2011-04-27 | 2011-12-28 | 武汉开明高新科技有限公司 | Process for repairing breakage of rotary kiln tyre/roller |
| CN102294567A (en) * | 2011-04-27 | 2011-12-28 | 武汉开明高新科技有限公司 | Process for repairing pitting and spalling of tyre and carrier roller of rotary kiln |
| KR20130072570A (en) * | 2011-12-22 | 2013-07-02 | 신현경 | Porosity of metal filter media and its producing method |
| CN106064286A (en) * | 2016-08-12 | 2016-11-02 | 华能湖南岳阳发电有限责任公司 | The broken teeth bracing means of a kind of huge gear and method for repairing and mending |
| CN108866502A (en) * | 2018-06-21 | 2018-11-23 | 太原理工大学 | A kind of titanium alloy surface high temperature coatings and preparation method thereof |
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2021
- 2021-01-13 CN CN202110045168.4A patent/CN112872706B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1590570A (en) * | 2003-09-05 | 2005-03-09 | 海恩斯国际公司 | Age-hardenable, corrosion resistant ni-cr-mo alloys |
| CN102294568A (en) * | 2011-04-27 | 2011-12-28 | 武汉开明高新科技有限公司 | Process for repairing breakage of rotary kiln tyre/roller |
| CN102294567A (en) * | 2011-04-27 | 2011-12-28 | 武汉开明高新科技有限公司 | Process for repairing pitting and spalling of tyre and carrier roller of rotary kiln |
| KR20130072570A (en) * | 2011-12-22 | 2013-07-02 | 신현경 | Porosity of metal filter media and its producing method |
| CN106064286A (en) * | 2016-08-12 | 2016-11-02 | 华能湖南岳阳发电有限责任公司 | The broken teeth bracing means of a kind of huge gear and method for repairing and mending |
| CN108866502A (en) * | 2018-06-21 | 2018-11-23 | 太原理工大学 | A kind of titanium alloy surface high temperature coatings and preparation method thereof |
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| CN112872706B (en) | 2023-03-31 |
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