CN1781644A - Repairing method for thin belt continuous casting crystallining roller - Google Patents
Repairing method for thin belt continuous casting crystallining roller Download PDFInfo
- Publication number
- CN1781644A CN1781644A CN 200410084781 CN200410084781A CN1781644A CN 1781644 A CN1781644 A CN 1781644A CN 200410084781 CN200410084781 CN 200410084781 CN 200410084781 A CN200410084781 A CN 200410084781A CN 1781644 A CN1781644 A CN 1781644A
- Authority
- CN
- China
- Prior art keywords
- roller
- continuous casting
- repairing method
- thin belt
- belt continuous
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Images
Landscapes
- Other Surface Treatments For Metallic Materials (AREA)
- Coating By Spraying Or Casting (AREA)
Abstract
The present invention relates to repair of thin belt continuous casting crystallizing roller, and is especially crystallizing roller surface repairing and regenerating technology. Cold aerodynamic spraying method is adopted, in which compressed gas carrying metal particle is made to bump the surface of the crystallizing roller in enough high speed so as to make the miniature metal particle produce sufficient deformation for adhering onto the surface of the crystallizing roller and to regenerate the outer surface of the crystallizing roller. The repairing coating and the crystallizing roller body contact closely and the homogeneous and compact coating constitutes the excellent surface heat conducting layer. The technological process of the present invention realizes the metal deposition at low temperature state without heat influence on the powder metal structure, re-crystallization of the base body and coating material, no adsorbed oxygen and no oxidation of metal powder.
Description
Technical field
The present invention relates to the steel-making continuous casting field, particularly relate to continuously casting thin metal strips crystallization roller recovery technique, also be particularly related to metal cold spraying attachment technique.
Background technology
The crystallization roller is one of critical component in the metal continuous cast tandem rolling plant equipment, the particularly continuous casting of metal sheet band, thin plate, and it mainly acts on is that the strip blank with certain concreting thickness is cooled off, is frozen into to molten metal fast, through rolling formation Cast Strip base.Its basic principle is that molten steel enters the molten bath of being made up of the crystallization roller and the side seal board of two reverse rotations by current distribution device, and liquid metal is frozen at the crystallization roll surface through quick cooling has certain thickness base shell, closes back formation strip (plate) through rolling.The basic structure of crystallization roller is mainly formed (Fig. 1) by roller core, roller shell.Its crystallization roll sleeve material mostly adopts the Cu alloy material manufacturing, and its roller core adopts the stainless steel manufacturing usually.The job requirement of crystallization roller is that roll surface temperature is no more than 500 ℃, in a short period of time high temperature fluent metal is solidified, and simultaneously applies certain roll-force in metal solidification process, self bears the wearing and tearing of the etch of liquid metal and plate, band simultaneously.Crystallization roller one side contacts with molten metal, and another side is the water-cooled face, and the crystallization roller is wanted to resist alternation heat fatigue stress.Because crystallization roller roll surface directly contacts with molten metal, elevated temperature strength and heat-conductive characteristic are the most important requirements of crystallization roller case material.Owing in this technical process, casting is finished simultaneously simultaneously, etch and wearing and tearing that the crystallization roller will can bear certain roll-force, molten steel.Crystallization roller end face directly contacts with the side seal material, and the wearability of crystallization roll end and low-cost repairing the thereof are very important.In addition, wearing and tearing or distortion take place in the crystallization roller in normal use, when wearing and tearing acquire a certain degree can not satisfy instructions for use the time, also will repair the crystallization roller.
The restorative procedure of continuous casting crystallization roller mainly contains machining turning, built-up welding and thermal spraying at present.Machining turning is that the roller shell car that the crystallization roller is frayed falls one deck, recovers its surface state and roll surface shape.But turning makes the attenuation of crystallization roll sleeve copper coin, repairs with post crystallization roll sleeve copper coin too thin, surperficial with inner cooling water seam several times apart from too little, crystallization roller subscription rate.
Often cause the selective oxidation of copper alloy in the weld deposit repairing process, between restoring area and matrix, form height and contain oxygen interface, influence the heat conductivility of crystallization roller; In addition, a large amount of heat of input in the repair process makes restoring area produce bigger thermal stress, influences the serviceability of crystallization roller.Moreover technique for overlaying is not suitable for repairs the crystal roller surface uniform wear.
The thermal spraying reparation is to adopt high temperature and high speed oxygen flame or high-temperature plasma bundle treating repairing area with patching material is spray deposited.These technology are exposed under the very high temperature surface that is repaired, and produce thermal stress; And make tissue odds even owing to forming new heat treating regime in the thermal spray process, and be easy to cause thermal deformation.The thawing of metal and solidify easy generation oxidation again in the thermal spray process, the increase of oxygen content can reduce the thermal conductivity of material greatly, and also is very difficult to remove in these oxygen elements process afterwards.Airless spraying can be alleviated degree of oxidation to a certain extent, but airless spraying cost height, and be difficult to control.
The crystallization roller is in use in order to improve the softening temperature and the case hardness of copper alloy roller shell and molten metal contact-making surface, generally at wear-resisting Ni, Cr, Co metal or its alloy of crystal roller surface plating one deck.The existence of overlay coating makes repair difficulty more, and traditional method is the whole cars of coating are fallen or to grind off, and prepares coating then again.Repair program complexity, workload is big, the cost height.
Used many crystallization rollers are in order to improve heat-conducting effect, and the surface that contacts with molten metal need be prepared into special ripple or curved surface.Increased the difficulty of repair.
Summary of the invention
In view of existing situation, the object of the present invention is to provide a kind of continuous casting crystallining roll restoring method that is used for, to repair the wearing and tearing of crystal roller surface, regeneration generates the surface that the crystallization roller contacts with molten metal, recover crystal roller surface state and size, greatly prolonged the service life of crystallization roller.Guarantee the material of crystallization roller, chemical composition, structure and surface state are identical with the original design of crystallization roller, repair district's non-oxidation, and crystallization does not take place for matrix material and repair materials.
For achieving the above object, the present invention adopts cold air power spraying and coating, be that high pressure compressed gas drives the surface that the minute metallic particle need be repaired with sufficiently high speed bump crystallization roller, enough plastic deformations take place and are bonded in and form new surface on the surface of crystallization roller in molecule, fill crack or wearing and tearing groove etc.;
The metal powder granulates that cold spraying is adopted can be copper (comprising copper alloy), iron and steel (comprising ferroalloy), titanium (comprising titanium alloy) and nickel (comprising nickel alloy) etc.
The diameter range of particulate is 1 μ m to 100 μ m.Driving gas can be nitrogen, air, helium or its mist;
Gas pressure is preferably 1.0MPa to 5.0MPa greater than 1.0Mpa; Gas flow 15～30g/s.Metal particle quickens to reach sufficiently high speed by nozzle, can in bump enough distortion take place and is bonded on the crystal roller surface.
The present invention is based on the aerodynamic force spraying technology, its principle is to utilize gases at high pressure to carry powder particle from axially entering high velocity air, produce supersonic flow by convergent-divergent pipe (superonic flow nozzzle), powder particle at the solid-state fully matrix of bump down, is deposited on matrix surface formation adhesion by producing enough big plastic deformation after the superonic flow nozzzle acceleration.
In the spray deposited repair process, the crystallization roller rotates around self central axis, and spray gun and crystallization roller central axis are on same horizontal plane, and be and perpendicular with central axis, moves horizontally gun slot and the identical distance of the surperficial maintenance of crystallization roll sleeve along central axis.
All wearing and tearing in use take place in the surface that the crystallization roller contacts with molten metal, can repair on the surface that whole crystallization rollers contact with molten metal, make the crystallization roller return to design size.
Cold air power spraying and coating can be realized the repair layer composition gradient transition, or the transition of composition gradual change type.
The present invention has following advantage:
1. generate the new surface of regeneration.The present invention is at the new superficial layer of the surface deposition of crystallization roller, and requires to carry out disposable reparation according to the surface configuration of crystallization roller, and the size of the crystallization roller after the reparation is identical with former design.Can not make the attenuation of crystal roller surface copper coin because of turning.
2. chemical composition and the tissue signature to thin band continuous casting crystallization roller do not have influence.The present invention is at the temperature deposit repair layer well below melting point metal, and matrix is not had heat affecting, can not cause the change of chemical composition because of the heat input causes the oxidation of matrix material and coating self material; Can not cause matrix material and coating self material structure to change because of the heat input yet.Can not guarantee the architectural characteristic of crystallization roller simultaneously because of the heat input causes the distortion of matrix generation heat expansion yet.The present invention can also make reducing metal or alloy be deposited on matrix surface effectively at the temperature deposit repair layer well below melting point metal, can eliminate the adsorb oxygen layer of matrix surface, improves the adhesion between repair layer and the matrix.
3. can heat-treat after repairing, also can not heat-treat.
4. the present invention does not need crystallization roller wear surface is handled before reparation, and the spraying initial stage can form the effect of similar sandblast at matrix surface, clears up the matrix surface pollutant automatically.Restorative procedure once can be finished cleaning and repair the remediation efficiency height.
5. the thickness of coating can be regulated, but the composition transition.The present invention can realize different coating layer thicknesses by regulating spray time.The repair layer densification.The present invention is the repair layer that supersonic speed particles hit matrix surface forms, the inner even compact of repair layer.The material of use material and continuous casting crystallization roller can be in full accord, also can be different, and the crystallization roller material that is suitable for comprises steel, copper or copper alloy.Satisfy the requirement that the wearing and tearing of different structure crystallization roller are repaired fully, guarantee the heat conductivility of crystallization roller.The gradient repair layer that also can prepare heterogeneity, the composition transition region of formation matrix material and surfacing, the coupling of raising adhesion and thermal coefficient of expansion improves crystallization roller thermal stress resistance ability.
6. repair ability is strong.The indicated range of reparation of the present invention can be crack, wearing and tearing groove, small size wearing and tearing, integral surface wearing and tearing etc.
Description of drawings
Fig. 1 is the embodiment of the invention 1 a cold air power spraying and coating system architecture schematic diagram;
Fig. 2 is the embodiment of the invention 1 a coating coating surface pattern;
Fig. 3 is the embodiment of the invention 1 a coating surface microstructure SEM shape appearance figure;
Fig. 4 is the embodiment of the invention 1 a coating section SEM shape appearance figure;
Fig. 5 is the embodiment of the invention 2 coating section SEM shape appearance figures;
Fig. 6 is the embodiment of the invention 3 coating section SEM shape appearance figures;
Fig. 7 is the embodiment of the invention 4 overbrushing layer section SEM shape appearance figures;
The specific embodiment
The concrete steps of repairing are:
(1), determines the upward coating thickness of each several part of surface according to crystal roller surface abrasion condition and crystal roller surface design shape;
(2) cold spraying reparation: select the powder kind, determine technological parameter, the crystallization roller is repaired with cold spraying;
(3) machining: the crystallization roller that produces moderate finite deformation in the use needs machining after spraying, does not need machining after less distortion and the wearing and tearing spraying.For the crystallization roller that produces moderate finite deformation in using, after recess is repaired in spraying, carry out turning to high spot and handle;
(4) repair inspection, the size of the crystallization roller after determining to spray is identical with former design.
Referring to Fig. 1, it is depicted as the cold air power spraying and coating system architecture, 1 fen two-way of Compressed Gas, and one the tunnel enters powder feeder 2, as carrier band gas metal dust is introduced superonic flow nozzzle 4; Another road Compressed Gas expands gas by gas heater 3, improve gas flow rate and hot spraying powder, tow channel gas flows to into superonic flow nozzzle 4, form gas-solid two-phase flow therein, kinetic energy metal bump is repaired surface of the work 5 in the two-phase flow, the spraying powder particle produces enough distortion and is bonded in the surface of restoring area, forms repair layer.
Embodiment 1
(1) according to crystal roller surface abrasion condition and crystal roller surface design shape, determine the upward coating thickness of each several part of surface, determine powder sending quantity and each regional spray time in the spraying.
(2) repair spraying: adopt the method for cold air power spraying and coating, utilize compressed nitrogen carry copper powder with supersonic spray coating in the molten steel crystal roller surface, repair crystallization roller wearing and tearing groove.Mean particle dia is 60-80 μ m.
Spray pure Cu renovation technique: spray distance 20mm, gas pressure 3.8～4MPa, 200 ℃ of gas temperatures, gas flow 20g/s, metal dust stroke speed 500m/s;
(3) repair inspection: the spraying back checks that to the surface size of repairing size is identical with former design;
The cold air power spraying and coating system architecture as shown in Figure 1,1 fen two-way of Compressed Gas, the one tunnel enters powder feeder 2, as carrier band gas metal dust is introduced superonic flow nozzzle 4; Another road Compressed Gas expands gas by gas heater 3, improve gas flow rate and hot spraying powder, tow channel gas flows to into superonic flow nozzzle 4, form gas-solid two-phase flow therein, kinetic energy metal bump is repaired surface of the work 5 in the two-phase flow, the spraying powder particle produces enough distortion and is bonded in the surface of restoring area, forms repair layer.
1Cu coating surface pattern embodiment illustrated in fig. 2 is repaired back coating surface uniformity as can be seen, and repairing effect is good.
1Cu coating surface microstructure pattern embodiment illustrated in fig. 3, coating surface even compact in the form of sheets connect, and coating quality is better.
Pure Cu coating section SEM shape appearance figure shown in Figure 4, the arrow mark of the interface between matrix and the coating.Coating even compact as can be seen, the interface is also not obvious in the high power microscopic observation, illustrates between pure Cu coating and the matrix closely to contact, and has formed good heat-transfer surface repair layer.Played the effect that forms new reparation surface of repairing.
Embodiment 2
Experimental procedure is with embodiment 1, different matrix materials be steel.The material of selecting is BeZrNiCu, and the diameter of particulate is: 30-40 μ m, renovation technique: spray distance 15mm, gas pressure 3.8MPa, 600 ℃ of gas temperatures, gas flow 20～30g/s, metal dust stroke speed 1100m/s.
BeZrNiCu coating section SEM shape appearance figure shown in Figure 5, the arrow mark of the interface between matrix and the coating.Coating even compact as can be seen, the interface is also not obvious in the high power microscopic observation, illustrates between BeZrNiCu coating and the steel substrate closely to contact, and has formed good heat-transfer surface repair layer.Played the effect that forms new reparation surface of repairing.
Embodiment 3
Experimental procedure is with embodiment 1.The material of selecting is the CrZrCu alloy, and the diameter of particulate is: 20-30 μ m, renovation technique: spray distance 20mm, metal dust stroke speed 500m/s, gas pressure 2.5MPa, gas temperature room temperature, gas flow 30g/s;
CrZrCu coating section SEM shape appearance figure shown in Figure 6, the arrow mark of the interface between matrix and the coating.Coating even compact as can be seen, the interface is also not obvious in the high power microscopic observation, illustrates between CrZrCu coating and the Cu matrix closely to contact, and has formed good heat-transfer surface repair layer.Played the effect that forms new reparation surface of repairing.
Embodiment 4
Experimental procedure is with embodiment 1, and different is to select multiple material preparation composite coating.30-40 μ m), (diameter of particulate is nickel alloy: 100-120 μ m), (diameter of particulate is the BeCoCu alloy: 5-20 μ m), (diameter of particulate is titanium alloy: 50-60 μ m) outwards be followed successively by from matrix: (diameter of particulate is the CrZrCu alloy:.CrZrCu spray coating alloy parameter: spray distance 20mm, gas pressure 3.0MPa, gas temperature room temperature, gas flow 30g/s; Nickel alloy spray parameters: spray distance 5mm, gas pressure 2.0MPa, gas temperature room temperature, gas flow 20g/s; BeCoCu spray coating alloy parameter: spray distance 50mm, gas pressure 1.5MPa, gas temperature room temperature, gas flow 30g/s; Titanium alloy spray parameters: spray distance 10mm, gas pressure 3.5MPa, gas temperature room temperature, gas flow 30g/s;
Overbrushing layer section SEM shape appearance figure shown in Figure 7, the interface between matrix and the CrZrCu alloy coat is also not obvious in the high power photo, uses the arrow mark in the drawings.Coating even compact as can be seen illustrates between CrZrCu coating and the Cu matrix closely to contact, and has formed good heat-transfer surface coating.The density of nickel-alloy coating is relatively low, this be since the spraying in gas pressure less, the diameter of particle is bigger in addition, so the speed of particle is relatively low, but still with CrZrCu alloy coat strong bonded.BeCoCu alloy coat and titanium alloy coating density height, even tissue.Interface between each coating is in conjunction with firm.The thickness difference of each coating can be regulated arbitrarily as required.
Claims (15)
1. repairing method for thin belt continuous casting crystallining roller, adopt the method for cold air power spraying and coating,, utilize Compressed Gas to carry the reparation surface of metal powder granulates with ultrasonic speed bump crystallization roller by spray gun, produce enough distortion and be bonded in crystallization roller reparation surface, form repair layer.
2. repairing method for thin belt continuous casting crystallining roller as claimed in claim 1 is characterized in that, the crystallization roller rotates around self central axis, and spray gun and crystallization roller central axis are on same horizontal plane, and be and perpendicular with central axis, moves horizontally along central axis.
3. repairing method for thin belt continuous casting crystallining roller as claimed in claim 1 is characterized in that, described Compressed Gas is nitrogen, air, helium or its mist.
4. repairing method for thin belt continuous casting crystallining roller as claimed in claim 1 is characterized in that described gas pressure is greater than 1.0Mpa.
5. repairing method for thin belt continuous casting crystallining roller as claimed in claim 1 is characterized in that described gas pressure is preferably 1.0MPa to 5.0Mpa.
6. as claim 1 or 3 described repairing method for thin belt continuous casting crystallining roller, it is characterized in that described gas flow 15～30g/s.
7. as claim 1,3 or 4 described repairing method for thin belt continuous casting crystallining roller, it is characterized in that described gas temperature is a room temperature to 600 ℃.
8. as claim 1,3 or 4 described repairing method for thin belt continuous casting crystallining roller, it is characterized in that the metal powder granulates stroke speed is greater than 500m/s.
9. repairing method for thin belt continuous casting crystallining roller as claimed in claim 1 is characterized in that, the diameter range of described metal powder granulates is 5 μ m to 120 μ m.
10. as claim 1 or 9 described repairing method for thin belt continuous casting crystallining roller, it is characterized in that described metal powder granulates material comprises fine copper, chrome zirconium copper alloy (CrZrCu), Be-Co-Cu alloy (BeCoCu), beryllium nickel zirconium copper alloy copper alloys such as (BeNiZrCu).
11. repairing method for thin belt continuous casting crystallining roller as claimed in claim 1 is characterized in that, spray distance 5～30mm between described spray gun and the matrix.
12. repairing method for thin belt continuous casting crystallining roller as claimed in claim 1 is characterized in that, described gun slot keeps identical distance with crystallization roll sleeve surface.
13. repairing method for thin belt continuous casting crystallining roller as claimed in claim 1 is characterized in that, the reparation surface of crystallization roller forms composition transitional region between matrix and the overlay coating.
14. repairing method for thin belt continuous casting crystallining roller as claimed in claim 1 is characterized in that, the spraying initial stage is cleared up matrix surface automatically in the effect of matrix surface formation sandblast.
15. repairing method for thin belt continuous casting crystallining roller as claimed in claim 1 is characterized in that, also can heat-treat after the reparation.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200410084781 CN1781644A (en) | 2004-11-30 | 2004-11-30 | Repairing method for thin belt continuous casting crystallining roller |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200410084781 CN1781644A (en) | 2004-11-30 | 2004-11-30 | Repairing method for thin belt continuous casting crystallining roller |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN1781644A true CN1781644A (en) | 2006-06-07 |
Family
ID=36772468
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200410084781 Pending CN1781644A (en) | 2004-11-30 | 2004-11-30 | Repairing method for thin belt continuous casting crystallining roller |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1781644A (en) |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101333637B (en) * | 2007-06-25 | 2010-07-28 | 宝山钢铁股份有限公司 | Process for repairing continuous casting crystal roller |
| CN101660033B (en) * | 2008-08-27 | 2011-06-15 | 宝山钢铁股份有限公司 | Method for nano reconstruction of surface texture of metal roller |
| CN103949601A (en) * | 2014-04-30 | 2014-07-30 | 宝山钢铁股份有限公司 | Preparation method for thin-strip casting crystallization roller surface appearance |
| CN104002202A (en) * | 2014-05-30 | 2014-08-27 | 宝山钢铁股份有限公司 | Production method of high-cleanliness and defect-free roughened surface of thin belt continuous casting crystallization roller |
| CN104099608A (en) * | 2013-04-10 | 2014-10-15 | 中国科学院金属研究所 | Method for cold spraying preparation of Cu-Ag-Zn abradable sealing coating |
| CN104178761A (en) * | 2013-05-20 | 2014-12-03 | 宝山钢铁股份有限公司 | Crystallization roller surface taper hole defect online recovery method |
| CN111534733A (en) * | 2020-03-25 | 2020-08-14 | 成都美奢锐新材料有限公司 | Wear-resistant coating material and preparation method thereof, and coating spraying method and repairing method |
-
2004
- 2004-11-30 CN CN 200410084781 patent/CN1781644A/en active Pending
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101333637B (en) * | 2007-06-25 | 2010-07-28 | 宝山钢铁股份有限公司 | Process for repairing continuous casting crystal roller |
| CN101660033B (en) * | 2008-08-27 | 2011-06-15 | 宝山钢铁股份有限公司 | Method for nano reconstruction of surface texture of metal roller |
| CN104099608A (en) * | 2013-04-10 | 2014-10-15 | 中国科学院金属研究所 | Method for cold spraying preparation of Cu-Ag-Zn abradable sealing coating |
| CN104099608B (en) * | 2013-04-10 | 2016-08-10 | 中国科学院金属研究所 | The method of Cu-Ag-Zn abradable seal coating is prepared in a kind of cold spraying |
| CN104178761A (en) * | 2013-05-20 | 2014-12-03 | 宝山钢铁股份有限公司 | Crystallization roller surface taper hole defect online recovery method |
| CN103949601A (en) * | 2014-04-30 | 2014-07-30 | 宝山钢铁股份有限公司 | Preparation method for thin-strip casting crystallization roller surface appearance |
| CN104002202A (en) * | 2014-05-30 | 2014-08-27 | 宝山钢铁股份有限公司 | Production method of high-cleanliness and defect-free roughened surface of thin belt continuous casting crystallization roller |
| CN111534733A (en) * | 2020-03-25 | 2020-08-14 | 成都美奢锐新材料有限公司 | Wear-resistant coating material and preparation method thereof, and coating spraying method and repairing method |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN102039384B (en) | Manufacturing method of composite coating layer on surface of high-resistant crystallizer or crystallizing roller | |
| CN101063203B (en) | Method for manufacturing Metallic plate with coating | |
| CN102189370B (en) | Cold spray repairing method for crystallizer copper plate | |
| CN100547112C (en) | The manufacture method of the clad steel plate of stainless steel coated carbon steel | |
| CN113445041B (en) | Preparation method of low-cost light high-entropy alloy/aluminum oxide composite coating on surface of magnesium alloy | |
| CN103805934B (en) | A kind of electric spark deposition strengthens the method on metal roller surface in conjunction with plasma cladding | |
| JP6291693B2 (en) | Mold correction and regeneration method using high-speed flame spray coating method and plasma ion nitriding method, and system thereof | |
| CN108247043A (en) | The cold spraying deposited metal 3D printing method and apparatus of fusible removal support | |
| CN109576628A (en) | The preparation method of continuous cast mold long side copper sheet composite coating | |
| CN109440049B (en) | Method for preparing amorphous aluminum coating by compounding electric arc spraying and laser remelting | |
| CN103614687A (en) | Preparation technique of continuous casting crystallizer copper plate surface cermet coating | |
| CN1781644A (en) | Repairing method for thin belt continuous casting crystallining roller | |
| CN106756717A (en) | A kind of preparation method of high-strength wearable adonic coating | |
| CN102465290A (en) | Manufacturing method of double-layer metal composite pipe | |
| CN112593042A (en) | High-temperature protective coating for end face of oxygen lance nozzle and preparation method thereof | |
| CN208116755U (en) | The cold spraying deposited metal 3D printer of fusible removal support | |
| CN108018548B (en) | Coating alloy for repairing tungsten-based powder alloy die-casting die and preparation method thereof | |
| CN1781643A (en) | Repairing method for crystallizer copper plate | |
| CN110923610B (en) | Preparation method of cobalt-based alloy composite powder and cladding coating for plasma spraying | |
| CN101637806B (en) | Manufacturing method of metal ceramic coating crystallizer copper plate | |
| CN106637040A (en) | Method for steel rail surface treatment by laminar plasma | |
| CN109226293A (en) | A kind of effective nickel-base alloy composite plate of petroleum gas and preparation method thereof | |
| CN101333637B (en) | Process for repairing continuous casting crystal roller | |
| CN100560256C (en) | Thin belt continuous casting crystal roller surface texture pattern On-Line Control Method | |
| CN109371350A (en) | A kind of micro- molten and compound method for preparing WC-12Co coating of supersonic flame spraying of laser |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
| WD01 | Invention patent application deemed withdrawn after publication |