Nickel-based alloy pipe fitting
By adding a multi-layer coating structure to the nickel-based alloy fittings, including the outer hafnium dioxide and aluminum oxide coatings and the inner polytetrafluoroethylene and polyvinyl chloride coatings, and tungsten carbide and the inner side are added respectively on the outer and inner side and respectively on the inner side. Silicon carbide coating solves the problem of insufficient high temperature and corrosion resistance of nickel-based alloy pipe fittings, and significantly improves the overall performance of pipe fittings.
Patent Information
- Application Number
- CN202421195997.6
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-05-29
- Publication Date
- 2024-12-27
- Estimated Expiration
- 2034-05-29
AI Technical Summary
The existing nickel-based alloy pipe fittings have poor high temperature and corrosion resistance, resulting in short service life.
The nickel-based alloy base layer plus the outer hafnium dioxide and aluminum oxide coating as the outer protective layer, the inner polytetrafluoroethylene and polyvinyl chloride coating as the inner protective layer, and the outer and inner sides are respectively provided with tungsten carbide and tungsten carbide and Silicon carbide coating to improve wear resistance.
It effectively improves the high temperature, corrosion and wear resistance of pipe fittings and extends the service life.
Smart Images
Figure CN222255386U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of pipe fittings, in particular to a nickel-based alloy pipe fitting. Background Art
[0002] Pipe fittings are a general term for parts that play the role of connection, control, direction change, diversion, sealing, support, etc. in pipeline systems. Nickel-based alloy pipe fittings are a type of pipe fittings. However, the existing nickel-based alloy pipe fittings have poor overall high temperature resistance and corrosion resistance, which reduces their service life. For this reason, we propose a nickel-based alloy pipe fitting. Utility Model Content
[0003] The purpose of the utility model is to provide a nickel-based alloy pipe fitting to solve the problems raised in the above background technology.
[0004] To achieve the above-mentioned purpose, the utility model provides the following technical solution: a nickel-based alloy pipe fitting, comprising a pipe body, the pipe body comprising a nickel-based alloy base layer, an outer protective layer is arranged on the outer side of the nickel-based alloy base layer, and the outer protective layer comprises a hafnium dioxide coating and an aluminum oxide coating, an inner protective layer is arranged on the inner side of the nickel-based alloy base layer, and the inner protective layer comprises a polytetrafluoroethylene coating and a polyvinyl chloride coating.
[0005] Preferably, the hafnium dioxide coating is coated on the outer side of the nickel-based alloy substrate layer, and the aluminum oxide coating is coated on the outer side of the hafnium dioxide coating.
[0006] Preferably, the thickness of the hafnium dioxide coating and the aluminum oxide coating are the same, and the thickness of the aluminum oxide coating is one hundred and fifty to two hundred and fifty micrometers.
[0007] Preferably, the polyvinyl chloride coating is coated on the inner side of the nickel-based alloy base layer, and the polytetrafluoroethylene coating is coated on the inner side of the polyvinyl chloride coating.
[0008] Preferably, the thickness of the polytetrafluoroethylene coating and the polyvinyl chloride coating are the same, and the thickness of the polytetrafluoroethylene coating is two hundred to three hundred microns.
[0009] Preferably, a tungsten carbide coating is provided on the outer side of the outer protective layer, and a silicon carbide coating is provided on the inner side of the inner protective layer.
[0010] Preferably, the silicon carbide coating and the tungsten carbide coating have the same thickness, and the thickness of the tungsten carbide coating is two hundred to four hundred microns.
[0011] Compared with the prior art, the beneficial effects of the utility model are as follows:
[0012] 1. The utility model is provided with an outer protective layer, the aluminum oxide coating included in it can play the role of the first layer of high temperature resistant protection for the outer side of the pipe body, and the hafnium dioxide coating plays the role of the second layer of high temperature resistant protection after the aluminum oxide coating is damaged. An inner protective layer is provided, the polytetrafluoroethylene coating included in it can play the role of the first layer of corrosion resistant protection for the inner side of the pipe body, and the polyvinyl chloride coating can play the role of the second layer of corrosion resistant protection for the inner side of the pipe body after the polytetrafluoroethylene coating is damaged.
[0013] 2. The utility model is provided with a silicon carbide coating to improve the wear resistance of the inner side of the tube body, and is provided with a tungsten carbide coating to improve the wear resistance of the outer side of the tube body. BRIEF DESCRIPTION OF THE DRAWINGS
[0014] Figure 1 It is a schematic diagram of the structure of the utility model;
[0015] Figure 2 This is a schematic diagram of the inner protective layer structure of the utility model;
[0016] Figure 3 This is a schematic diagram of the outer protective layer structure of the utility model.
[0017] In the figure: tube body 1, nickel-based alloy base layer 11, silicon carbide coating 12, inner protective layer 13, polytetrafluoroethylene coating 131, polyvinyl chloride coating 132, outer protective layer 14, hafnium dioxide coating 141, aluminum oxide coating 142, tungsten carbide coating 15. DETAILED DESCRIPTION
[0018] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.
[0019] The pipe body 1, nickel-based alloy base layer 11, silicon carbide coating 12, inner protective layer 13, polytetrafluoroethylene coating 131, polyvinyl chloride coating 132, outer protective layer 14, hafnium dioxide coating 141, aluminum oxide coating 142 and tungsten carbide coating 15 components of the present application are all universal standard parts or components known to those skilled in the art, and their structures and principles can be known to those skilled in the art through technical manuals or through conventional experimental methods.
[0020] See also Figure 1-Figure 3A nickel-based alloy pipe fitting comprises a pipe body 1, the pipe body 1 comprises a nickel-based alloy base layer 11, an outer protective layer 14 is arranged on the outer side of the nickel-based alloy base layer 11, and the outer protective layer 14 comprises a hafnium dioxide coating 141 and an aluminum oxide coating 142, the aluminum oxide coating 142 can play the role of a first layer of high temperature resistant protection for the outer side of the pipe body 1, and the hafnium dioxide coating 141 plays the role of a second layer of high temperature resistant protection after the aluminum oxide coating 142 is damaged, an inner protective layer 13 is arranged on the inner side of the nickel-based alloy base layer 11, and the inner protective layer 13 comprises a polytetrafluoroethylene coating 131 and a polyvinyl chloride coating 132, the polytetrafluoroethylene coating 131 can play the role of a first layer of corrosion resistant protection for the inner side of the pipe body 1, and the polyvinyl chloride coating 132 can play the role of a second layer of corrosion resistant protection for the inner side of the pipe body 1 after the polytetrafluoroethylene coating 131 is damaged.
[0021] The hafnium dioxide coating 141 is coated on the outer side of the nickel-based alloy base layer 11, and the aluminum oxide coating 142 is coated on the outer side of the hafnium dioxide coating 141. The thickness of the hafnium dioxide coating 141 and the aluminum oxide coating 142 are the same, and the thickness of the aluminum oxide coating 142 is 150 to 250 microns. The polyvinyl chloride coating 132 is coated on the inner side of the nickel-based alloy base layer 11, and the polytetrafluoroethylene coating 131 is coated on the inner side of the polyvinyl chloride coating 132. The thickness of the ethylene coating 131 and the polyvinyl chloride coating 132 is the same, and the thickness of the polytetrafluoroethylene coating 131 is two hundred to three hundred microns. A tungsten carbide coating 15 is provided on the outside of the outer protective layer 14 to improve the wear resistance of the outer side of the pipe body 1, and a silicon carbide coating 12 is provided on the inside of the inner protective layer 13 to improve the wear resistance of the inner side of the pipe body 1. The thickness of the silicon carbide coating 12 and the tungsten carbide coating 15 is the same, and the thickness of the tungsten carbide coating 15 is two hundred to four hundred microns.
[0022] When in use, an outer protective layer 14 is provided, and the aluminum oxide coating 142 included therein can serve as the first layer of high temperature resistant protection for the outer side of the tube body 1, and the hafnium dioxide coating 141 can serve as the second layer of high temperature resistant protection after the aluminum oxide coating 142 is damaged. An inner protective layer 13 is provided, and the polytetrafluoroethylene coating 131 included therein can serve as the first layer of corrosion resistant protection for the inner side of the tube body 1, and the polyvinyl chloride coating 132 can serve as the second layer of corrosion resistant protection for the inner side of the tube body 1 after the polytetrafluoroethylene coating 131 is damaged. A silicon carbide coating 12 is provided to improve the wear resistance of the inner side of the tube body 1, and a tungsten carbide coating 15 is provided to improve the wear resistance of the outer side of the tube body 1.
[0023] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.
Claims
1. A nickel-based alloy pipe, comprising a pipe body (1), characterized in that: The tube body (1) comprises a nickel-based alloy base layer (11), an outer protective layer (14) is arranged on the outer side of the nickel-based alloy base layer (11), and the outer protective layer (14) comprises a hafnium dioxide coating (141) and an aluminum oxide coating (142), and an inner protective layer (13) is arranged on the inner side of the nickel-based alloy base layer (11), and the inner protective layer (13) comprises a polytetrafluoroethylene coating (131) and a polyvinyl chloride coating (132).
2. A nickel-based alloy pipe fitting according to claim 1, characterized in that: The hafnium dioxide coating (141) is coated on the outer side of the nickel-based alloy base layer (11), and the aluminum oxide coating (142) is coated on the outer side of the hafnium dioxide coating (141).
3. A nickel-based alloy pipe fitting according to claim 1, characterized in that: The thickness of the hafnium dioxide coating (141) and the aluminum oxide coating (142) are the same, and the thickness of the aluminum oxide coating (142) is 150 to 250 micrometers.
4. A nickel-based alloy pipe fitting according to claim 1, characterized in that: The polyvinyl chloride coating (132) is coated on the inner side of the nickel-based alloy base layer (11), and the polytetrafluoroethylene coating (131) is coated on the inner side of the polyvinyl chloride coating (132).
5. A nickel-based alloy pipe fitting according to claim 1, characterized in that: The thickness of the polytetrafluoroethylene coating (131) and the polyvinyl chloride coating (132) are the same, and the thickness of the polytetrafluoroethylene coating (131) is 200 to 300 microns.
6. A nickel-based alloy pipe fitting according to claim 1, characterized in that: A tungsten carbide coating (15) is provided on the outer side of the outer protective layer (14), and a silicon carbide coating (12) is provided on the inner side of the inner protective layer (13).
7. A nickel-based alloy pipe fitting according to claim 6, characterized in that: The thickness of the silicon carbide coating (12) and the tungsten carbide coating (15) are the same, and the thickness of the tungsten carbide coating (15) is 200 to 400 microns.