CN212526429U - High-power remelting ring for flame spray welding - Google Patents
High-power remelting ring for flame spray welding Download PDFInfo
- Publication number
- CN212526429U CN212526429U CN202020994651.8U CN202020994651U CN212526429U CN 212526429 U CN212526429 U CN 212526429U CN 202020994651 U CN202020994651 U CN 202020994651U CN 212526429 U CN212526429 U CN 212526429U
- Authority
- CN
- China
- Prior art keywords
- gas
- remelting
- ring
- nozzle
- cavity
- 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.)
- Withdrawn - After Issue
Links
- 238000003466 welding Methods 0.000 title claims abstract description 14
- 239000007921 spray Substances 0.000 title claims abstract description 11
- 239000007789 gas Substances 0.000 claims abstract description 95
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 20
- 239000000498 cooling water Substances 0.000 claims abstract description 18
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 claims abstract description 17
- 239000001301 oxygen Substances 0.000 claims abstract description 17
- 229910052760 oxygen Inorganic materials 0.000 claims abstract description 17
- 238000001816 cooling Methods 0.000 claims abstract description 16
- 230000000694 effects Effects 0.000 claims abstract description 7
- 238000005219 brazing Methods 0.000 claims description 7
- 238000002485 combustion reaction Methods 0.000 claims description 6
- 230000008602 contraction Effects 0.000 claims description 4
- 230000006835 compression Effects 0.000 claims description 3
- 238000007906 compression Methods 0.000 claims description 3
- 230000003247 decreasing effect Effects 0.000 claims description 3
- 238000009792 diffusion process Methods 0.000 claims description 3
- 239000000203 mixture Substances 0.000 claims description 3
- 230000007704 transition Effects 0.000 claims description 3
- 238000000034 method Methods 0.000 abstract description 13
- 230000008569 process Effects 0.000 abstract description 7
- 239000011248 coating agent Substances 0.000 description 7
- 238000000576 coating method Methods 0.000 description 7
- 238000010438 heat treatment Methods 0.000 description 5
- 239000000463 material Substances 0.000 description 5
- ATUOYWHBWRKTHZ-UHFFFAOYSA-N Propane Chemical compound CCC ATUOYWHBWRKTHZ-UHFFFAOYSA-N 0.000 description 4
- 239000000758 substrate Substances 0.000 description 4
- 239000000956 alloy Substances 0.000 description 3
- 229910045601 alloy Inorganic materials 0.000 description 3
- 238000005253 cladding Methods 0.000 description 3
- 238000004372 laser cladding Methods 0.000 description 3
- 230000006698 induction Effects 0.000 description 2
- 239000001294 propane Substances 0.000 description 2
- QZLJNVMRJXHARQ-UHFFFAOYSA-N [Zr].[Cr].[Cu] Chemical compound [Zr].[Cr].[Cu] QZLJNVMRJXHARQ-UHFFFAOYSA-N 0.000 description 1
- 238000005299 abrasion Methods 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 239000000567 combustion gas Substances 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000009851 ferrous metallurgy Methods 0.000 description 1
- 238000005242 forging Methods 0.000 description 1
- 230000014509 gene expression Effects 0.000 description 1
- 238000005098 hot rolling Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 238000002156 mixing Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000010935 stainless steel Substances 0.000 description 1
- 229910001220 stainless steel Inorganic materials 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 238000006557 surface reaction Methods 0.000 description 1
- 238000004381 surface treatment Methods 0.000 description 1
Images
Abstract
The utility model provides a high-power remelting ring of flame spray welding usefulness, include: the device comprises a fused ring, a nozzle, a cooling pipeline, a mixed gas pipeline, a gas joint, an oxygen joint, a gas control main valve and a protection pipe; the oxygen cylinder is connected with the oxygen interface through a hose, the gas cylinder is connected with the gas interface through a hose, and the two gases adjust the gas flow through a gas control valve and an oxygen control valve. The gas enters a mixed gas pipeline through a gas control main valve, is finally conveyed into a gas flow cavity, and is sprayed and combusted through a nozzle; one end of the cooling pipeline is connected with the cooling water tank, enters an annular cooling water flow cavity in the remelting ring through a water inlet and then flows out of a water outlet to form a closed-loop cooling water channel; the workpiece is arranged in the remelting ring 1 and automatically rotates, and the remelting ring moves transversely along the workpiece according to the remelting effect to complete the remelting process of the whole workpiece.
Description
Technical Field
The utility model relates to a machine-building and welding technology field particularly, especially relate to and be applicable to carry out the remelting treatment to the metal surface from the molten alloy coating, realize a flame spray welding with circle of remelting of the metallurgical combination of coating and base member.
Background
At present, the whole service cycle of the roller is short under the combined action of high-temperature impact and abrasion on a hot-rolling laminar flow conveying roller way, a gap bridge roller way of a crimper and the like in the ferrous metallurgy industry. The surface of the roller is ensured to have thermal fatigue resistance and high-temperature red hardness by adopting the surface spray welding self-fluxing alloy coating. In the prior art, the metallurgical bonding of the coating and the substrate is generally obtained by adopting flame remelting, induction remelting, laser cladding and other modes. The flame remelting power greatly influences the remelting effect, a small single-head remelting gun is originally adopted, the flame is concentrated, the heating uniformity is poor, the efficiency is low, only small parts can be heated and remelted, and the remelting control of large parts cannot be realized. The induction remelting generally adopts a high-frequency heater to heat and melt the coating from outside to inside, and the substrate is not heated. Laser cladding is a rapid fusing process generated by using a high-energy-density laser beam, and an alloy coating which is fused with a substrate and has completely different components and performances is formed on the surface of a base material, but the heating and cooling speeds are very high during laser cladding, the temperature gradient and the thermal expansion coefficient difference of the cladding layer and the substrate material are large, various defects such as air holes, cracks, deformation, surface unevenness and the like can be generated in the cladding layer, and the cladding requirement of a high-hardness material cannot be met.
Disclosure of Invention
According to the technical problems provided by the invention, the flame remelting ring with high power, uniform heating, simple operation and adjustable performance is provided, and the problems of poor gas flow control, uneven heating of the surface of a workpiece, low energy utilization rate, interference of human factors and the like in the flame spray welding remelting process are effectively solved.
The utility model discloses a technical means as follows:
a high power remelted coil for flame spray welding, comprising: the remelting ring, the nozzle, the cooling pipeline, the mixed gas pipeline, the gas joint, the oxygen joint, the gas control main valve and the protection pipe;
the remelting ring is provided with a remelting ring body, a gas flow cavity is arranged in the outer diameter direction of the remelting ring body and is divided into an outer cavity and an inner cavity, the remelting ring body is formed by connecting a mixed gas pipeline and a remelting ring body gas inlet hole, a gas flow balance distributor is arranged at the joint of the outer cavity and the inner cavity, and the surface of the outer cavity is sealed;
two ends of the remelting ring are provided with an annular cooling water flow cavity, a water inlet hole and a water outlet hole, the water inlet hole and the water outlet hole are connected with a cooling pipeline, and the surface of the annular cooling water flow cavity is sealed;
a plurality of uniformly distributed combustion nozzle holes are formed in the inner diameter direction of the remelting ring, the combustion nozzle holes and the nozzles are welded together through brazing, and the outer surfaces of the cooling pipeline and the mixed gas pipeline are surrounded and fixed by a non-protection pipe;
the gas flow balance distributor mixes the combustible gas and the combustion-supporting gas in a certain proportion through a gas control main valve and sends the mixture to an outer cavity of a gas flow cavity of the remelting ring through a mixed gas pipeline; the gas enters the inner cavity through the gas flow balance distributor and then flows out through the nozzle to be combusted; a plurality of vent holes with the diameter of 2-2.5mm are distributed on the gas flow balance distributor, the distances between the vent holes with adjacent diameters are ordered in an arithmetic progression from near to far, and the diameters are distributed in a subsection way from small to large;
the nozzle adopts a high-speed annular nozzle structure with concentrated energy and consists of a contraction section, a throat and a diffusion section, the joint of the three sections adopts a smooth transition mode with gradually decreased radius, mixed gas in a gas flow cavity is ejected at high speed through the compression and expansion effects of the nozzle, the outer wall of the nozzle 2 is provided with an annular boss, the nozzle and a remelting ring are conveniently installed and positioned, and meanwhile, flame brazing is adopted for welding and fixing.
A method for assembling a high-power remelting ring for flame spray welding comprises the following steps:
step one, an oxygen cylinder is connected with an oxygen interface through a hose, a gas cylinder is connected with a gas interface through a hose, and the flow of the two gases is adjusted through a gas control valve and an oxygen control valve;
step two, the gas enters a mixed gas pipeline through a gas control main valve, is finally conveyed into a gas flow cavity, and is jetted and combusted through a nozzle;
step three, one end of a cooling pipeline is connected with a cooling water tank, enters an annular cooling water flow cavity in the remelting ring through a water inlet and then flows out of a water outlet to form a closed-loop cooling water channel;
and fourthly, the workpiece is arranged in the remelting ring and automatically rotates, and the remelting ring moves transversely along the workpiece according to the remelting effect to complete the remelting process of the whole workpiece.
Compared with the prior art, the utility model discloses solved flame spray welding remelting process in-process gas flow control poor effectively, workpiece surface be heated inequality, energy utilization low, the human factor interference scheduling problem, reduced work intensity of operation and manufacturing cost, promoted advantages such as product quality. The mirror surface reaction is obvious when the workpiece is remelted, the mirror surface width is controllable, the coating surface is flat after remelting, no crack exists, and the method is particularly suitable for surface treatment of large-sized roller annular parts.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required to be used in the description of the embodiments or the prior art are briefly introduced below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without inventive labor.
FIG. 1 is a schematic view of the overall structure of a remelting ring;
FIG. 2 is a schematic view of a remelted annular ring structure;
FIG. 3 is a schematic view of a gas flow balancing distributor;
FIG. 4 is a schematic view of a gas flow control valve;
FIG. 5 is a schematic view of a remelting ring nozzle;
FIG. 6 is a schematic view of the use of the remelted collar as a whole;
in the figure:
1. remelting the ring; 2. a nozzle; 3. a cooling pipeline; 4. a mixed gas line; 5. a gas joint; 6. an oxygen connector; 7. a gas control main valve; 8. protecting the tube; 9. a gas flow chamber; 10. an annular cooling water flow cavity; 11. remelting the air inlet hole of the ring body; 12. a water inlet hole; 13. a water outlet hole; 14. a combustion nozzle hole; 15. a gas flow balancing distributor; 16. a gas control valve; 17. an oxygen control valve; 18. A contraction section; 19. a throat; 20. a diffuser section; 21. an oxygen cylinder; 22. a gas cylinder; 23. a cooling water tank; 24. and (5) a workpiece.
Detailed Description
It should be noted that, in the present invention, the embodiments and features of the embodiments may be combined with each other without conflict. The present invention will be described in detail below with reference to the accompanying drawings in conjunction with embodiments.
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. The following description of at least one exemplary embodiment is merely illustrative in nature and is in no way intended to limit the invention, its application, or uses. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.
It is noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of example embodiments in accordance with the invention. As used herein, the singular forms "a", "an" and "the" are intended to include the plural forms as well, and it should be understood that when the terms "comprises" and/or "comprising" are used in this specification, they specify the presence of stated features, steps, operations, devices, components, and/or combinations thereof, unless the context clearly indicates otherwise.
Unless specifically stated otherwise, the relative arrangement of the components and steps, the numerical expressions, and numerical values set forth in these embodiments do not limit the scope of the present invention. Meanwhile, it should be understood that the sizes of the respective portions shown in the drawings are not drawn in an actual proportional relationship for the convenience of description. Techniques, methods, and apparatus known to those of ordinary skill in the relevant art may not be discussed in detail but are intended to be part of the specification where appropriate. Any specific values in all examples shown and discussed herein are to be construed as exemplary only and not as limiting. Thus, other examples of the exemplary embodiments may have different values. It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, further discussion thereof is not required in subsequent figures.
In the description of the present invention, it should be understood that the orientation or positional relationship indicated by the orientation words such as "front, back, up, down, left, right", "horizontal, vertical, horizontal" and "top, bottom", etc. are usually based on the orientation or positional relationship shown in the drawings, and are only for convenience of description and simplicity of description, and in the case of not making a contrary explanation, these orientation words do not indicate and imply that the device or element in question must have a specific orientation or be constructed and operated in a specific orientation, and therefore should not be construed as limiting the scope of the present invention: the terms "inner and outer" refer to the inner and outer relative to the profile of the respective component itself.
Spatially relative terms, such as "above … …," "above … …," "above … …," "above," and the like, may be used herein for ease of description to describe one device or feature's spatial relationship to another device or feature as illustrated in the figures. It will be understood that the spatially relative terms are intended to encompass different orientations of the device in use or operation in addition to the orientation depicted in the figures. For example, if a device in the figures is turned over, devices described as "above" or "on" other devices or configurations would then be oriented "below" or "under" the other devices or configurations. Thus, the exemplary term "above … …" can include both an orientation of "above … …" and "below … …". The device may be otherwise variously oriented (rotated 90 degrees or at other orientations) and the spatially relative descriptors used herein interpreted accordingly.
It should be noted that the terms "first", "second", and the like are used to define the components, and are only used for convenience of distinguishing the corresponding components, and if not stated otherwise, the terms have no special meaning, and therefore, the scope of the present invention should not be construed as being limited.
As shown in fig. 1, the utility model provides a high-power remelting ring for flame spray welding, include: the remelting ring 1, the nozzle 2, the cooling pipeline 3, the mixed gas pipeline 4, the gas joint 5, the oxygen joint 6, the gas control main valve 7 and the protection pipe 8;
(1) the ring 1 is remelted as shown in fig. 2.
The material is chromium-zirconium-copper material, and is manufactured by integral forging. The remelting ring 1 is provided with a gas flow cavity 9 in the outer diameter direction, which is divided into an outer cavity and an inner cavity and formed by connecting a mixed gas pipeline 4 and a remelting ring body gas inlet 11, a gas flow balance distributor 15 is arranged at the joint of the outer cavity and the inner cavity, and the surface of the outer cavity is sealed by brazing.
Two ends of the remelting ring 1 are provided with an annular cooling water flow cavity 10, a water inlet 12 and a water outlet 13, the water inlet 12 and the water outlet 13 are connected with a cooling pipeline 3, and the surface of the annular cooling water flow cavity 10 is sealed by brazing.
A plurality of uniformly distributed combustion nozzle holes 14 are formed in the inner diameter direction of the remelting ring 1, and the nozzle holes 14 and the nozzle 2 are welded together through brazing, so that combustion gas and a workpiece can be rapidly and uniformly heated.
The size of the remelting ring 1 is mainly determined by the size of the workpiece to be heated, and the diameter range is generally between 200 mm and 350 mm.
In order to ensure that the cooling pipeline 3 and the mixed gas pipeline 4 are collided, deformed and damaged in the using process, the outer surfaces of the cooling pipeline and the mixed gas pipeline are surrounded and fixed by a stainless steel pipe 8.
(2) The gas flow balances the distributor 15 as shown in figure 3. Combustible gas and combustion-supporting gas are mixed in a certain proportion through a flow control valve 7, and the mixture is sent to an outer cavity of a gas flow cavity 9 of the remelting ring 1 through a mixed gas pipeline 4. Enters the inner cavity through the gas flow balance distributor 15 and then flows out through the nozzle 2 to be combusted. In order to ensure uniform gas mixing and stable pressure and flow, a plurality of vent holes with the diameter of 2-2.5mm are distributed on the gas flow balance distributor 15, the distances of the vent holes with adjacent diameters are arranged in an arithmetic progression from near to far, and the diameters are distributed in a subsection manner from small to large.
(3) The nozzle, as shown in fig. 5. The high-speed annular nozzle structure with concentrated energy is adopted and consists of a contraction section 18, a throat 19 and a diffusion section 20, the joint of the three sections adopts a smooth transition mode with decreasing radius, and mixed gas in the gas flow cavity 9 is ejected at high speed through the compression and expansion effects of the nozzle, so that the power of the gas is ensured to meet the use requirement. The structural design that the outer wall of the nozzle is provided with the annular boss facilitates the installation and positioning of the nozzle and the remelting ring, and meanwhile, flame brazing is adopted for welding and fixing.
The implementation steps and methods are as follows:
as shown in fig. 6, the oxygen cylinder 21 is connected to the oxygen port 6 via a hose, the gas cylinder 22 is connected to the gas port 5 via a hose, and the flow rates of the two gases are adjusted by the gas control valves 16 and 17 (the assembly structure is shown in fig. 4). Enters the mixed gas pipeline 4 through the gas control main valve 7, is finally conveyed into the gas flow cavity 9, and is sprayed and combusted through the nozzle 2.
One end of the cooling pipeline 3 is connected with a cooling water tank 23, enters the annular cooling water flow cavity 10 in the remelting ring 1 through the water inlet 12, and then flows out of the water outlet 13 to form a closed-loop cooling water channel.
The workpiece 24 is arranged in the remelting ring 1 and automatically rotates, and the remelting ring 1 transversely moves along the workpiece according to the remelting effect to complete the remelting process of the whole workpiece.
By the above embodiment, taking the hot-rolled laminar flow roller table as an example, the main parameters of the example are listed as follows:
diameter of the workpiece: phi 300
Length of workpiece: 2300 mm;
rotating speed of the workpiece: 30 to 40r/min
Moving speed of the remelting ring: 50 to 60mm/min
Moving and positioning precision of the remelting ring: plus or minus 0.3mm
Maximum heating temperature: 1650 deg.C
Temperature control accuracy: 0.1 ℃ C
Flow rate of propane: 500 to 700L/min
Oxygen flow rate: 600 to 900L/min
The flow control precision of propane: 0.2L/min
Oxygen flow control precision: 0.2L/min
And (3) cooling water pressure control: 0.5-1 MPa.
Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; although the present invention has been described in detail with reference to the foregoing embodiments, it should be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; such modifications and substitutions do not depart from the spirit and scope of the present invention.
Claims (1)
1. A high power remelted coil for flame spray welding, comprising:
the remelting ring (1), the nozzle (2), the cooling pipeline (3), the mixed gas pipeline (4), the gas joint (5), the oxygen joint (6), the gas control main valve (7) and the protection pipe (8);
a gas flow cavity (9) is arranged in the outer diameter direction of the remelting ring (1) and is divided into an outer cavity and an inner cavity, the outer cavity and the inner cavity are formed by connecting a mixed gas pipeline (4) and a remelting ring body gas inlet hole (11), a gas flow balance distributor (15) is arranged at the joint of the outer cavity and the inner cavity, and the surface of the outer cavity is sealed;
two ends of the remelting ring (1) are provided with an annular cooling water flow cavity (10), a water inlet hole (12) and a water outlet hole (13), the water inlet hole (12) and the water outlet hole (13) are connected with the cooling pipeline (3), and the surface of the annular cooling water flow cavity (10) is sealed;
a plurality of combustion nozzle holes (14) which are uniformly distributed are formed in the inner diameter direction of the remelting ring (1), the combustion nozzle holes (14) and the nozzles (2) are welded together through brazing, and the outer surfaces of the cooling pipeline (3) and the mixed gas pipeline (4) are surrounded and fixed through a protection pipe (8);
the gas flow balance distributor (15) mixes combustible gas and combustion-supporting gas in a certain proportion through a gas control main valve (7), and sends the mixture to an outer cavity of a gas flow cavity (9) of the remelting ring (1) through a mixed gas pipeline (4); enters the inner cavity through a gas flow balance distributor (15) and then flows out through a nozzle (2) to be combusted; a plurality of vent holes with the diameter of 2-2.5mm are distributed on the gas flow balance distributor (15), the distances between the vent holes with adjacent diameters are ordered in an arithmetic progression from near to far, and the diameters are distributed in sections from small to large;
the nozzle (2) adopts a high-speed annular nozzle structure with concentrated energy and consists of a contraction section (18), a throat (19) and a diffusion section (20), the joint of the three sections adopts a smooth transition form with a gradually decreased radius, mixed gas in the gas flow cavity (9) is ejected at a high speed through the compression and expansion effects of the nozzle (2), and the outer wall of the nozzle (2) is provided with the structural design of an annular boss, so that the nozzle (2) and the remelting ring (1) can be conveniently installed and positioned.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020994651.8U CN212526429U (en) | 2020-06-03 | 2020-06-03 | High-power remelting ring for flame spray welding |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020994651.8U CN212526429U (en) | 2020-06-03 | 2020-06-03 | High-power remelting ring for flame spray welding |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN212526429U true CN212526429U (en) | 2021-02-12 |
Family
ID=74638378
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202020994651.8U Withdrawn - After Issue CN212526429U (en) | 2020-06-03 | 2020-06-03 | High-power remelting ring for flame spray welding |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN212526429U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111570966A (en) * | 2020-06-03 | 2020-08-25 | 大连华锐重工特种备件制造有限公司 | High-power remelting ring for flame spray welding and assembling method thereof |
| CN113996689A (en) * | 2021-10-13 | 2022-02-01 | 航天材料及工艺研究所 | Method for controlling spinning temperature field of phi 3350mm2195 aluminum lithium alloy integral box bottom |
-
2020
- 2020-06-03 CN CN202020994651.8U patent/CN212526429U/en not_active Withdrawn - After Issue
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111570966A (en) * | 2020-06-03 | 2020-08-25 | 大连华锐重工特种备件制造有限公司 | High-power remelting ring for flame spray welding and assembling method thereof |
| CN111570966B (en) * | 2020-06-03 | 2024-03-15 | 大连华锐重工特种备件制造有限公司 | High-power remelting ring for flame spray welding and assembly method thereof |
| CN113996689A (en) * | 2021-10-13 | 2022-02-01 | 航天材料及工艺研究所 | Method for controlling spinning temperature field of phi 3350mm2195 aluminum lithium alloy integral box bottom |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN212526429U (en) | High-power remelting ring for flame spray welding | |
| US10155283B2 (en) | Method for manufacturing mill roll, mill roll and manufacturing apparatus of mill roll | |
| KR101504978B1 (en) | Spray quench systems for heat treated metal products | |
| KR101261020B1 (en) | Method and device for coating metallic pipes or other long components which have a restricted cross section | |
| CN205702952U (en) | Flame preheating device before the weldering of a kind of thick-walled pressure vessel cylinder | |
| CN105803170B (en) | A kind of aluminium alloy cylindrical member spray quenching apparatus and its application method | |
| CN108098204A (en) | Girth welding oxygen-proof protecting device and its header stack shell welding method | |
| CN108115135B (en) | Device for controlling temperature in metal additive manufacturing process | |
| US20130248515A1 (en) | Hot gas torches, hot gas torch systems and hot gas heating methods | |
| RU2454287C2 (en) | Gas-flame straightening device | |
| CN111570966A (en) | High-power remelting ring for flame spray welding and assembling method thereof | |
| KR20080103269A (en) | Manufacturing apparatus of curved surfaces of outer plate of hull | |
| CN104611665B (en) | A kind of method of the thermal spraying prepares coating on large scale bend pipe class workpiece | |
| EP2777857A2 (en) | Joining methods and temperature controlled fluid treating systems for joining | |
| CN111286584A (en) | System and method for laser nitriding metal surfaces | |
| CN108247052B (en) | Method for temperature control of metal additive manufacturing process | |
| CN213590831U (en) | Laser spraying spray gun capable of preparing coating with ultrahigh bonding strength | |
| US20030219545A1 (en) | Apparatus and a method for the thermal coating of a surface | |
| CN1179064C (en) | Method and apparatus for remelting surface coatings of large roll | |
| CN212128235U (en) | System for laser nitriding metal surfaces | |
| CN204544177U (en) | A kind of novel high-efficiency and energy-saving spiral half-pipe jacket glass-lined equipment | |
| CN209773771U (en) | Preheating device before marine riser girth welding | |
| US10385436B2 (en) | Molten metal plating furnace, system for producing and method for producing plated product, and metal plated steel tube obtained by means of said method for producing | |
| CN202419650U (en) | Heating pipe for pre-welding heating | |
| CN104947104A (en) | Flame remelting device for valve ball core |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned | ||
| AV01 | Patent right actively abandoned | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20210212 Effective date of abandoning: 20240315 |
|
| AV01 | Patent right actively abandoned |
Granted publication date: 20210212 Effective date of abandoning: 20240315 |