High-strength corrosion-resistant bearing steel pipe
By using a multi-layered composite structure and a specially designed cross-section, the problems of insufficient corrosion resistance and strength in bearing steel pipes have been solved, resulting in high-strength, wear-resistant, and low-cost bearing steel pipes suitable for aerospace, marine equipment, and automobile manufacturing.
Patent Information
- Application Number
- CN202520682470.4
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-04-11
- Publication Date
- 2026-02-13
- Estimated Expiration
- 2035-04-11
AI Technical Summary
Existing bearing steel tubes are prone to corrosion in humid or corrosive environments, and their strength is insufficient to meet high load requirements. Furthermore, the processing technology is complex and costly.
It adopts a multi-layer composite structure design, including a surface strengthening layer, a corrosion-resistant alloy layer and a high-toughness carbon steel layer. Combined with a special octagonal cross-section design, and through carburizing and nitriding layer treatment, it forms a bearing steel pipe with high strength, excellent corrosion resistance and wear resistance.
It achieves long-term stable operation in complex environments, extends service life, reduces production costs, and is suitable for multiple industrial fields.
Smart Images
Figure CN223909271U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to the field of steel pipe, concretely relates to a high strength corrosion -resistant bearing steel pipe. BACKGROUND
[0002] In many industrial scenes, bearing steel pipes not only have to bear large pressure and friction, but also are often exposed to corrosive environments.
[0003] The bearing steel pipes on the current market, although some have high strength, have poor corrosion resistance, are prone to rust in humid or corrosive environments, and have short service life, and the strength of some steel pipes with good corrosion resistance cannot meet the requirements of high-strength load, in addition, the processing technology of conventional bearing steel pipes is relatively complex, the production cost is high, and the large-scale application is limited. SUMMARY
[0004] In view of the above problems existing in the prior art bearing steel pipe, the utility model is provided.
[0005] Therefore, the utility model aims at providing a high-strength corrosion-resistant bearing steel pipe, which solves the problem of easy rusting.
[0006] In order to achieve the above-mentioned purpose, the utility model provides the following technical scheme:
[0007] A high-strength corrosion-resistant bearing steel pipe, comprising a steel pipe, a plurality of composite structures are fixedly arranged in the steel pipe, and the plurality of composite structures are sequentially arranged from the outside to the inside as a surface strengthening layer, a corrosion-resistant alloy layer and a high-toughness carbon steel layer, the outer side of the steel pipe is octagonal, the inner side of the steel pipe is circular, the high-toughness carbon steel layer is made of high-quality low-carbon alloy steel layer, and the surface strengthening layer is made of carburizing layer and nitriding layer.
[0008] Preferably, the thickness of the high-toughness carbon steel layer is 8mm.
[0009] Preferably, the thickness of the corrosion-resistant alloy layer is 3mm.
[0010] Preferably, the thickness of the surface strengthening layer is 1mm.
[0011] Further, the corrosion-resistant alloy layer is made of a metal layer of chromium, nickel, molybdenum and the like.
[0012] In the above technical scheme, the utility model provides the technical effect and advantages:
[0013] 1、The utility model has the advantages that the surface strengthening layer, the corrosion-resistant alloy layer and the high-toughness carbon steel layer are adopted, and the performance is excellent: the multilayer composite structure and the special cross section design make the steel pipe have multiple excellent performances such as high strength, high toughness, corrosion resistance and wear resistance, can long-term and stable operation in complex and severe working environment, and the service life is greatly prolonged.
[0014] 2、The utility model discloses a cost advantage: innovative processing technology reduces production procedure, reduces manufacturing cost, improves production efficiency, strengthens the competitiveness of product on market.
[0015] 3、The utility model discloses a bearing steel pipe is suitable for aerospace, marine equipment, automobile manufacturing and a plurality of fields, satisfies the demand of different industries to high-performance bearing steel pipe. BRIEF DESCRIPTION OF DRAWINGS
[0016] In order to make the person skilled in the art better understand the technical scheme of the utility model, the drawings needed in the embodiment will be briefly introduced as follows, and obviously, the drawings in the following description are only some embodiments described in the utility model, and other drawings can also be obtained according to these drawings for the person skilled in the art.
[0017] Figure 1 It is the three-dimensional structure schematic diagram of the utility model.
[0018] Figure 2 It is the three-dimensional structure cross-sectional view schematic diagram of the utility model.
[0019] Figure 3 It is the A part enlarged schematic diagram of the utility model. Figure 1
[0020] Mark explanation:
[0021] 1, steel pipe;2, surface strengthening layer;3, corrosion-resistant alloy layer;4, high toughness carbon steel layer. DETAILED DESCRIPTION
[0022] In order to make the person skilled in the art better understand the technical scheme of the utility model, the drawings needed in the embodiment will be briefly introduced as follows, and obviously, the drawings in the following description are only some embodiments described in the utility model, and other drawings can also be obtained according to these drawings for the person skilled in the art.
[0023] The utility model embodiment discloses a kind of high-strength corrosion-resistant bearing steel pipes.
[0024] The utility model provides a kind of as Figures 1-3 The high-strength, corrosion-resistant bearing steel pipe shown includes a steel pipe 1. The steel pipe 1 has a multi-layered composite structure fixed inside. From the outside in, the composite structure consists of a surface strengthening layer 2, a corrosion-resistant alloy layer 3, and a high-toughness carbon steel layer 4. The outer side of the steel pipe 1 is octagonal, and the inner side is circular. The high-toughness carbon steel layer 4 is made of high-quality low-carbon alloy steel, and the surface strengthening layer 2 consists of a carburizing layer and a nitriding layer. During use, users should select and use the bearing steel pipe 1 appropriately according to the actual working environment and load requirements. Regular inspection and maintenance of the steel pipe 1 are necessary, including timely cleaning of surface dirt and corrosion, and prompt handling of any problems. For steel pipe 1 exposed to harsh corrosive environments for extended periods, appropriate protective measures, such as coating with anti-corrosion paint, can be added to further extend its service life. The octagonal design, with its larger number of sides compared to a hexagon, increases the contact area with the inner and outer rings of the bearing, resulting in a more uniform pressure distribution. Under complex loads, the sides and corners of the octagonal cross-section work together to disperse stress, effectively improving the fatigue resistance of the steel pipe 1. Experimental data show that, under the same working conditions, the fatigue life of the octagonal cross-section bearing steel tube 1 is about 50% higher than that of the circular cross-section.
[0025] To resist internal stress, such as Figures 1-3 As shown, the high-toughness carbon layer is 8mm thick, and the inner circle and outer polygon design allows for compatibility with common components: the inner side is circular, enabling it to be compatible with most standard shafts on the market without requiring special processing of the shaft, thus reducing equipment modification costs. For example, in the bearing systems of ordinary motors and pumps, using the inner circle and outer polygon bearing steel tube 1 can improve the fit performance with the outer ring of the bearing by utilizing the polygonal outer surface, while also ensuring compatibility with the original shaft.
[0026] For better corrosion resistance, such as Figure 3 As shown, the thickness of the corrosion-resistant alloy layer 3 is 3 mm.
[0027] To achieve better surface hardness, such as Figure 3 As shown, the surface reinforcement layer 2 has a thickness of 1 mm.
[0028] Finally, for surface strengthening treatment, such as Figure 3 As shown, the corrosion-resistant alloy layer 3 is made of metals such as chromium, nickel, and molybdenum, which are hot-extruded under high temperature and high pressure to ensure a tight bond between the two layers. The formed pipe then undergoes surface strengthening treatment to form a surface strengthening layer.
[0029] The above description only illustrates certain exemplary embodiments of the present invention. Undoubtedly, those skilled in the art can modify the described embodiments in various ways without departing from the spirit and scope of the present invention. Therefore, the above drawings and descriptions are illustrative in nature and should not be construed as limiting the scope of protection of the claims of the present invention.
Claims
1. A high-strength corrosion-resistant bearing steel tube comprising a steel tube (1), characterized in that, The steel pipe (1) is internally fixed with a multilayer composite structure, and the multilayer composite structure is sequentially arranged from outside to inside as a surface strengthening layer (2), a corrosion-resistant alloy layer (3) and a high-toughness carbon steel layer (4), the steel pipe (1) is octagonal in shape on the outside, the steel pipe (1) is circular in shape on the inside, the high-toughness carbon steel layer (4) is made of a high-quality low-carbon alloy steel layer, and the surface strengthening layer (2) is made of a carburized layer and a nitrided layer.
2. A high-strength corrosion-resistant bearing steel tube according to claim 1, characterized in that, The high-toughness carbon steel layer (4) has a thickness of 8 mm.
3. A high-strength corrosion-resistant bearing steel tube according to claim 1, characterized in that, The corrosion-resistant alloy layer (3) has a thickness of 3 mm.
4. The high-strength corrosion-resistant bearing steel tube of claim 1, wherein, The surface strengthening layer (2) has a thickness of 1 mm.
5. The high-strength corrosion-resistant bearing steel tube of claim 1, wherein, The corrosion-resistant alloy layer (3) is made of a metal layer of chromium, nickel, molybdenum and the like.