CN216005984U - Bearing surface protection composite coating structure - Google Patents
Bearing surface protection composite coating structure Download PDFInfo
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- CN216005984U CN216005984U CN202122395387.3U CN202122395387U CN216005984U CN 216005984 U CN216005984 U CN 216005984U CN 202122395387 U CN202122395387 U CN 202122395387U CN 216005984 U CN216005984 U CN 216005984U
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Abstract
The utility model discloses a bearing surface protection composite coating structure, which comprises a bearing steel matrix and an anode metal coating thermally sprayed on the surface of the bearing steel matrix; the surface cleanliness of the bearing steel matrix is Sa2 North grade or above, and the roughness Rz is more than or equal to 25 mu m; the thickness of the anode metal coating is 20-60 mu m; wherein the anode metal coating is a zinc layer or a zinc alloy layer or an aluminum alloy layer. Through the organic combination of positive pole metallic coating and application coating, form the composite coating structure that adhesive force is good, barrier propterty is excellent, solved the technical problem that current bearing hot spraying exists, the utility model relates to a can also save processes such as subsequent finish grinding, super precision, reduce grinding cost by a wide margin, the utility model discloses the clean environmental protection of composite coating structural design can form good comprehensive benefit.
Description
Technical Field
The utility model relates to a bearing product surface protection technique, concretely relates to bearing surface protection composite coating structure belongs to bearing protection technical field.
Background
The bearings in many fields need to work in certain exposure environments, such as special bearings for high-speed rails, wind generating sets, port machinery, oil drilling machines, radars and the like, and the requirements of corrosion resistance, high temperature resistance, oxidation resistance and the like are provided for the bearings so as to ensure the safe use and the reliable service life of the bearings. In order to improve the corrosion resistance, the existing bearing generally adopts the protection measures of phosphorization, electroplating, painting, polytetrafluoroethylene spraying and the like, for example, Chinese patent CN201510477992.1 discloses a wind turbine generator pitch bearing and a corrosion-resistant treatment method thereof, wherein epoxy zinc-rich primer, epoxy mica iron intermediate paint and fluorocarbon finish paint are sequentially sprayed on the surfaces of an inner ring and an outer ring of the bearing, and the corrosion resistance of the pitch bearing is improved through triple corrosion-resistant protection; and the zinc plus intermediate paint plus finish paint composite system is adopted, and the total thickness of the coating structure is 0.3 mm-0.4 mm to protect the bearing surface (Wangshou, Yao china: "application of anticorrosion technology on turntable bearing", 2006, stage 8), the practical application of the technology is that the process is complex, the protection effect is not ideal, and the existing environment-friendly production requirements cannot be met.
The hot spraying technique is a long-acting protection technique recognized at home and abroad, and Chinese patent CN200410060584.8 discloses a bearing surface anticorrosion treatment process, wherein a method of hot spraying metal and assisting coating protection is adopted to carry out anticorrosion on a non-working surface of a bearing, firstly, the surface of a base body of the bearing is cleaned, then, the cleaned surface of the base body is subjected to sand blasting treatment, a high-speed oxygen-gas spray gun or wire electric arc spray gun spraying equipment is utilized to spray a metal layer on the surface of the bearing subjected to sand blasting treatment, a manual grinding machine or abrasive cloth is used to remove particles attached to the surface of the sprayed layer, compressed air is used for blowing clean, and finally, the sprayed layer is subjected to sealing treatment by using organic coating, so that the treated bearing has good anticorrosion effect and good ultraviolet resistance, and the coating can be protected for more than 20 years in atmospheric exposure. The prior art shows that the hot spraying protection technology is also actively adopted in the wind power field at home and abroad, and a good protection effect is achieved. However, the development of the bearing surface corrosion prevention treatment process is over years, the early thermal spraying technology is lagged behind, the effective thickness of the coated thermal spraying coating is generally required to be 100 micrometers or more, and even the effective thickness of the coated thermal spraying coating is at least 50 micrometers or more (thermal spraying metal and other inorganic covering layers of zinc, aluminum and alloys thereof (GB/T9793-one 2012)), in the bearing surface corrosion prevention treatment process, the thickness of the thermal spraying coating is not less than 0.2mm (Wanglifeng, Wangwandfor: 'application of the thermal spraying technology in bearing corrosion prevention', 'comprehensive corrosion control', 2005-03); in the application of the anticorrosion technology on the turntable bearing, the thickness of the thermal spraying metal coating is more than 70 mu m, and the total thickness of the metal coating and the organic closed coating reaches 0.3 mm-0.4 mm. In addition, the sealing of a plurality of paints is complex in working procedure, large in pollution and poor in economic and social benefits.
In addition, with the development of bearing technology, especially the wide application of high-carbon chromium bearing steel bearing and its heat treatment technology, the existing thermal spraying protection technology can not meet the protection requirements of modern bearing products more and more, and mainly presents the following problems: firstly, the surface hardness of the steel bearing of the modern high-carbon chromium bearing is high, the prior thermal spraying and sand blasting pretreatment technology can not form effective roughness, for example, the surface hardness of the steel material of the high-carbon chromium bearing is 229 HB-269 HB (GB/T18254- & lthigh-carbon chromium bearing steel & gt 2016), the surface hardness of the finished bearing after thermal treatment reaches 55 HRC-63 HRC (TB/T2235- & ltrolling bearing for railway vehicles & gt 2016), when sand blasting operation is carried out, bearing steel sand is immediately adopted, the roughness Rz of the bearing surface after treatment is only 5 mu m-10 mu m (Ra =0.05 mu m after ultra-precision treatment before treatment), and the basic technical requirements of coating are less than 25 mu m and above (the first part of the surface roughness of the steel material after spray cleaning before coating the steel surface treatment, the technical requirements and definitions of ISO surface roughness comparison sample block for evaluating the surface roughness of the steel material after spray cleaning (GB/T13288.1-2008) . Secondly, the roughness of the surface of the bearing steel matrix after sand blasting treatment is insufficient, which causes difficulty in thermal spraying construction, such as peeling of the coating caused by spraying at a normal distance and peeling caused by a high coating thickness, and although the coating coverage is ensured after the spraying distance is lengthened, the adhesion of the coating is obviously reduced, the surface of the coating is rough, and the like, thereby seriously damaging the due protective performance.
At present, the bearing preparation method mainly comprises the steps of feeding, rough grinding, heat treatment, fine grinding, final grinding and ultra-precision (Tianjun, et al, "research and development and manufacture of automatic railway bearing ring grinding and processing lines", manufacturing technology and machine tool, 2014, No. 8); the rough grinding is generally reserved for 0.05 mm-0.1 mm, the surface roughness Ra can reach 0.08 mu m after the super-precision treatment, the existing anticorrosion protection technology is used for surface treatment protection of the bearing after the super-precision treatment, and obviously, the problem of insufficient roughness exists in the existing sand blasting technology.
Disclosure of Invention
The above-mentioned problem to bearing surface current hot spraying technique existence, the utility model discloses a bearing surface innovation has designed a composite coating structure, combine bearing machining process, when bearing surface grinds the processing finely, with the roughness of its surface Ra3.2 mu m even Ra0.8 mu m, the adjustment is Ra5 mu m and above, reach Sa2 and when the surface cleanliness above reaching after the bearing surface sandblast treatment, also can form Rz and be the roughness more than 25 mu m, guarantee the adhesive force of anode metal coating and bearing substrate, and combine in the coating organic, form adhesive force good, the composite coating structure that barrier propterty is good, not only solved the technical problem that current bearing hot spraying exists, can also save original final grinding, processes such as super-precision, reduce grinding cost by a wide margin, the coating design is clean environmental protection, can produce good comprehensive benefits.
The utility model provides a concrete scheme of prior art problem as follows: the bearing surface protection composite coating structure comprises a bearing steel substrate and an anode metal coating thermally sprayed on the surface of the bearing steel substrate;
the surface cleanliness of the bearing steel matrix is Sa2 North grade or above, and the roughness Rz is more than or equal to 25 mu m; the thickness of the anode metal coating is 20-60 mu m; wherein the anode metal coating is a zinc layer or a zinc alloy layer or an aluminum alloy layer.
As the preferred scheme of bearing surface protection composite coating structure: the bearing steel substrate has surface cleanliness of grade Sa2 North or above and roughness Rz of 25-60 mu m; the thickness of the anode metal coating is 20-40 μm.
As the preferred scheme of bearing surface protection composite coating structure: the surface cleanliness of the bearing steel matrix is Sa3 grade, and the roughness Rz is 25-60 mu m; the thickness of the anode metal coating is 25-35 μm.
As the preferred scheme of bearing surface protection composite coating structure: the surface cleanliness of the bearing steel matrix is Sa3 grade, and the roughness Rz is 25-80 mu m; the thickness of the anode metal coating is 30-60 mu m.
As the preferred scheme of bearing surface protection composite coating structure: the surface cleanliness of the bearing steel matrix is Sa3 grade, and the roughness Rz is 25-60 mu m; the thickness of the anode metal coating is 25-45 μm.
As the preferred scheme of bearing surface protection composite coating structure: the surface cleanliness of the bearing steel matrix is Sa3 grade, and the roughness Rz is 25-60 mu m; the thickness of the anode metal coating is 25-35 μm.
As the preferred scheme of bearing surface protection composite coating structure: the surface of the anode metal coating is also provided with a coating, and the thickness of the coating is 0.1-30 mu m.
As the preferred scheme of bearing surface protection composite coating structure: the coating layer is formed by coating water-based sealing paint with the thickness of 0.1-20 mu m.
As the preferred scheme of bearing surface protection composite coating structure: the coating layer is formed by coating an aqueous passivator to a thickness of 0.1-5 mu m.
As the preferred scheme of bearing surface protection composite coating structure: the surface of the bearing steel substrate refers to the working surfaces of the bearing outer ring, the bearing inner ring and the bearing roller, and the assembled surface and the exposed surface.
The utility model has the advantages that:
the utility model discloses creatively utilizes current bearing processing technology, and the roughness Ra is handled in the fine grinding of reverse regulation and control bearing surface, for bearing surface sand blasting roughness has created good condition, has not only effectively solved the prior art problem, can also save subsequent processes such as finish grinding or even super precision, practices thrift the man-hour and the bearing manufacturing cost of relevant process by a wide margin.
The utility model discloses with hot spraying coating thickness design 60 mu m even 35 mu m below, when providing high-efficient protection for the bearing surface, also guaranteed the effective control of bearing product tolerance.
The utility model discloses the application coating still preferentially adopts waterborne products such as current waterborne sealing coating, water-based passivating agent, has solved the environmental pollution problem that VOC that original solvent type paint exists exceeds standard and discharges, and bearing manufacturing production technology has realized green cleanness.
Drawings
FIG. 1 is a schematic structural view of the present invention;
FIG. 2 is a schematic structural view of the coating layer of the present invention;
in the figure: 1-bearing steel substrate; 2. an anodic metal coating; 3. and (5) coating.
The specific implementation mode is as follows:
the invention is further described with reference to the following figures and examples.
Example 1
As shown in fig. 1, the bearing surface protection composite coating structure refers to the surfaces of the bearing outer ring, the bearing inner ring and the roller except the working surfaces, including the matching surfaces and the exposed surfaces.
The utility model discloses composite coating structure includes bearing steel matrix 1, positive pole metallic coating 2.
The surface roughness Ra of the bearing steel matrix 1 after fine grinding is 5-25 mu m, the surface cleanliness of the bearing steel matrix 1 subjected to sand blasting by adopting bearing steel sand is Sa2 grade, and the roughness Rz of the bearing steel matrix reaches 25-60 mu m; then adopt the electric arc spraying technique to form anode metal coating 2 on bearing steel substrate 1 after the sandblast treatment spraying metal zinc silk, thickness is 20 mu m ~ 40 mu m, forms promptly the utility model discloses a bearing surface protection composite coating structure.
Example 2
As shown in fig. 1, the bearing surface protection composite coating structure refers to the surfaces of the bearing outer ring, the bearing inner ring and the roller except the working surfaces, including the matching surfaces and the exposed surfaces.
The utility model discloses composite coating structure includes bearing steel matrix 1, positive pole metallic coating 2.
The surface roughness Ra of the bearing steel matrix 1 after fine grinding is 5-25 mu m, the surface cleanliness of the bearing steel matrix 1 after sand blasting treatment by adopting bearing steel grit is Sa3 level, and the roughness Rz of the bearing steel matrix reaches 25-100 mu m; then adopt the electric arc spraying technique to form anode metal coating 2 on bearing steel substrate 1 after the sandblast is handled, thickness is 30 mu m ~ 80 mu m, forms promptly the utility model discloses a bearing surface protection composite coating structure.
Example 3
As shown in fig. 1, the bearing surface protection composite coating structure refers to the surfaces of the bearing outer ring, the bearing inner ring and the roller except the working surfaces, including the matching surfaces and the exposed surfaces.
The utility model discloses composite coating structure includes bearing steel matrix 1, positive pole metallic coating 2.
The surface roughness Ra of the bearing steel matrix 1 after fine grinding is 5-10 mu m, the surface cleanliness of the bearing steel matrix 1 subjected to sand blasting by adopting bearing steel sand is Sa2 grade, and the roughness Rz of the bearing steel matrix reaches 25-80 mu m; then the supersonic speed electric arc spraying technology is adopted to spray zinc-aluminum alloy wires (ZnAl 15) on the bearing steel substrate 1 after the sand blasting treatment to form an anode metal coating 2, the thickness is 25 mu m-35 mu m, and the utility model discloses a bearing surface protection composite coating structure is formed promptly.
Example 4
As shown in fig. 2, the bearing surface protection composite coating structure refers to the surfaces of the bearing outer ring, the bearing inner ring and the roller except the working surfaces, including the matching surfaces and the exposed surfaces.
The utility model discloses composite coating structure includes bearing steel substrate 1, positive pole metal coating 2, application coating 3.
The surface roughness Ra of the bearing steel matrix 1 after fine grinding is 5-10 mu m, the surface cleanliness of the bearing steel matrix 1 subjected to sand blasting by adopting bearing steel sand is Sa2 grade, and the roughness Rz of the bearing steel matrix reaches 25-60 mu m; then, a supersonic speed electric arc spraying technology is adopted to spray zinc-aluminum alloy wires (ZnAl 15) on the bearing steel matrix 1 after sand blasting treatment to form an anode metal coating 2 with the thickness of 25-35 mu m; and then, coating the anode metal coating 2 with a water-based epoxy primer to form a coating layer 3, wherein the water-based epoxy primer is impregnated into the anode metal coating 2 as much as possible, the thickness of the coating layer 3 on the surface of the anode metal coating 2 is controlled to be 0-30 μm, the thickness can be further optimized to be 5-20 μm, and the thickness of the coating layer 3 on the surface can be ignored in general design. Form promptly the utility model discloses a bearing surface protection composite coating structure.
Example 5
As shown in fig. 2, the bearing surface protection composite coating structure refers to the surfaces of the bearing outer ring, the bearing inner ring and the roller except the working surfaces, including the matching surfaces and the exposed surfaces.
The utility model discloses composite coating structure includes bearing steel substrate 1, positive pole metal coating 2, application coating 3.
The surface roughness Ra of the bearing steel matrix 1 after fine grinding is 5-10 mu m, the surface cleanliness of the bearing steel matrix 1 after sand blasting treatment by adopting bearing steel grit is Sa3 level, and the roughness Rz of the bearing steel matrix reaches 25-60 mu m; then, spraying a metal aluminum wire on the bearing steel substrate 1 subjected to sand blasting by adopting a supersonic electric arc spraying technology to form an anode metal coating 2 with the thickness of 25-45 microns; and then, coating the anode metal coating 2 by using an aqueous passivating agent to form a coating layer 3, wherein the aqueous passivating agent can be coated for 1-2 times and can be impregnated into the anode metal coating 2 as much as possible, the thickness of the surface coating layer 3 of the anode metal coating 2 is controlled to be 0-20 mu m and can be further optimized to be 0-5 mu m, and the thickness of the surface coating layer 3 can be ignored in general design. Form promptly the utility model discloses a bearing surface protection composite coating structure.
Bearing actual spraying course of working and testing result show, the utility model discloses a sandblast roughness Rz is showing and is improving 25 mu m ~ 100 mu m, and the metal coating peeling problem does not appear in the hot spraying operation in-process, and hot spraying metal coating adhesive force testing result compares with prior art and improves by a wide margin, all reaches the national standard requirement. The relevant salt fog test shows (see table 1), the utility model discloses composite coating structure barrier propterty is showing and is improving, has improved the protective capacities of bearing by a wide margin.
Table 1. embodiments of the present invention compare test data with prior art's performance
Claims (10)
1. Bearing surface protection composite coating structure, its characterized in that: the bearing steel base body is provided with an anode metal coating through thermal spraying;
the surface cleanliness of the bearing steel matrix is Sa2 North grade or above, and the roughness Rz is more than or equal to 25 mu m; the thickness of the anode metal coating is 20-60 mu m; wherein the anode metal coating is a zinc layer or a zinc alloy layer or an aluminum alloy layer.
2. The bearing surface protective composite coating structure of claim 1, wherein: the surface cleanliness of the bearing steel matrix is Sa2 North grade or above, and the roughness Rz is 25-60 mu m; the thickness of the anode metal coating is 20-40 μm.
3. The bearing surface protective composite coating structure of claim 1, wherein: the surface cleanliness of the bearing steel matrix is Sa3 grade, and the roughness Rz is 25-60 mu m; the thickness of the anode metal coating is 25-35 μm.
4. The bearing surface protective composite coating structure of claim 1, wherein: the surface cleanliness of the bearing steel matrix is Sa3 grade, and the roughness Rz is 25-80 mu m; the thickness of the anode metal coating is 30-60 mu m.
5. The bearing surface protective composite coating structure of claim 1, wherein: the surface cleanliness of the bearing steel matrix is Sa3 grade, and the roughness Rz is 25-60 mu m; the thickness of the anode metal coating is 25-45 μm.
6. The bearing surface protective composite coating structure of claim 1, wherein: the surface cleanliness of the bearing steel matrix is Sa3 grade, and the roughness Rz is 25-60 mu m; the thickness of the anode metal coating is 25-35 μm.
7. The bearing surface protective composite coating structure of claim 1, wherein: the surface of the anode metal coating is also provided with a coating, and the thickness of the coating is 0.1-30 mu m.
8. The bearing surface protective composite coating structure of claim 7, wherein: the coating layer is formed by coating water-based sealing paint with the thickness of 0.1-20 mu m.
9. The bearing surface protective composite coating structure of claim 7, wherein: the coating layer is formed by coating an aqueous passivator to a thickness of 0.1-5 mu m.
10. The bearing surface protective composite coating structure of claim 1, wherein: the surface of the bearing steel substrate refers to the working surfaces of the bearing outer ring, the bearing inner ring and the bearing roller, and the assembled surface and the exposed surface.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122395387.3U CN216005984U (en) | 2021-09-30 | 2021-09-30 | Bearing surface protection composite coating structure |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122395387.3U CN216005984U (en) | 2021-09-30 | 2021-09-30 | Bearing surface protection composite coating structure |
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| CN216005984U true CN216005984U (en) | 2022-03-11 |
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| CN202122395387.3U Active CN216005984U (en) | 2021-09-30 | 2021-09-30 | Bearing surface protection composite coating structure |
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