Anti-fracture high-strength hot-rolled spring flat steel
By combining a glass fiber mesh on the outside of hot-rolled spring flat steel with an inner reinforcing rib mesh, a buffer cylinder, and a protective layer, the problem of excessive bending and crack propagation of hot-rolled spring flat steel under bending loads is solved. This achieves the ability to resist fracture and bending loads, improves the wear resistance and corrosion resistance of the material, and extends its service life.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- 江苏巴马型钢有限公司
- Filing Date
- 2025-06-16
- Publication Date
- 2026-05-12
AI Technical Summary
Hot-rolled spring flat steel is prone to excessive bending when subjected to bending loads, which limits the spring's ability to bear large external forces and makes it unsuitable for high load-bearing applications. At the same time, cracks propagate rapidly, reducing toughness and leading to fatigue failure under cyclic loading.
First and second glass fibers are set on the outside of the flat steel body to form a grid structure, and first and second reinforcing ribs are set inside and interlaced to form a grid. Combined with buffer cylinders, protective layer, and anti-corrosion layer, the glass fibers share the stress and increase the moment of inertia, the buffer cylinders absorb energy, and the protective layer provides wear resistance and anti-corrosion performance.
It improves the flat steel's resistance to fracture, bending, and torsion, reduces the risk of cracking, enhances the material's wear resistance and corrosion resistance, and extends its service life.
Smart Images
Figure CN224229719U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of steel technology, specifically to a high-strength hot-rolled spring flat steel that is resistant to breakage. Background Technology
[0002] Hot-rolled spring flat steel is a type of steel with specific cross-sectional shape and performance requirements, mainly used for manufacturing elastic elements such as springs. It is a flat steel produced through a hot-rolling process and is widely used in suspension systems of automobiles, motorcycles, tractors, shock-absorbing components in industrial equipment, and elastic elements in various types of machinery, making it an important engineering material. However, flat steel has drawbacks: it has low strength, is prone to breakage and deformation, resulting in low utilization, and its wear resistance and corrosion resistance are insufficient, affecting its service life. To address these shortcomings, existing technology (Chinese patent application number: 202320981505.5, authorized announcement date: 2023-11-07) discloses a high-strength hot-rolled spring flat steel, which comprises a flat steel body, a first glass fiber, and a second glass fiber, through... The flat steel body has a fracture-prevention mechanism consisting of a combination of first and second glass fibers fixed inside, both at the top and bottom. The combination of first and second glass fibers forms a mesh structure, which increases the strength of the flat steel and prevents breakage. It includes the flat steel body, first reinforcing ribs, and second reinforcing ribs, evenly spaced along the middle of the flat steel body. It also has a deformation-prevention mechanism consisting of a combination of first and second reinforcing ribs, with the second reinforcing ribs evenly distributed within the first reinforcing ribs, effectively preventing deformation and improving utilization. Finally, it includes the flat steel body, a high- and low-temperature resistant polytetrafluoroethylene (PTFE) film, and a PE anti-corrosion film. The high- and low-temperature resistant PTFE film is applied to both the top and bottom sides of the flat steel body, and the PE anti-corrosion film is applied to the outer side of the high- and low-temperature PTFE film, providing good wear resistance and corrosion resistance, extending service life.
[0003] Existing technologies use a fracture-resistant mechanism composed of a combination of first and second glass fibers to increase the strength of flat steel and prevent breakage. However, hot-rolled spring flat steel is more prone to excessive bending when subjected to bending loads, which limits the ability of the spring to bear large external forces and is not suitable for high-load-bearing applications. At the same time, once cracks appear in hot-rolled spring flat steel, they will propagate rapidly, reducing the toughness of the flat steel and making it prone to failure due to fatigue cracks under cyclic loads. Therefore, we have proposed a fracture-resistant high-strength hot-rolled spring flat steel that can effectively solve the above problems. Utility Model Content
[0004] The purpose of this utility model is to provide a high-strength hot-rolled spring flat steel that is resistant to breakage, in order to solve the problems mentioned in the background art, such as hot-rolled spring flat steel being more prone to excessive bending when subjected to bending loads, which limits the ability of springs to bear large external forces and is not suitable for high load-bearing scenarios. At the same time, once cracks appear in hot-rolled spring flat steel, they will propagate rapidly, reducing the toughness of the flat steel and making it prone to failure due to fatigue cracks under cyclic loads.
[0005] To achieve the above objectives, this utility model provides the following technical solution: a high-strength hot-rolled spring flat steel with fracture resistance, comprising a flat steel body, wherein a first glass fiber and a second glass fiber are respectively disposed on the outer side of the flat steel body; further comprising: a cavity is opened inside the flat steel body, and a first reinforcing rib and a second reinforcing rib are disposed at equal intervals inside the cavity; buffer cylinders are connected at equal intervals inside the flat steel body; a protective layer is coated on the outer surface of the flat steel body, and an anti-corrosion layer is coated on the side of the protective layer away from the flat steel body; and a wear-resistant layer is coated on the side of the anti-corrosion layer away from the protective layer.
[0006] Preferably, the first and second glass fibers are distributed at equal intervals on the outer side of the flat steel body, and the first and second glass fibers form a mesh structure, and the first and second glass fibers are bonded to the outer side of the flat steel body by an adhesive.
[0007] Preferably, a plurality of first and second reinforcing ribs are vertically intersected to form a grid inside the cavity, and the first and second reinforcing ribs are made of high-strength alloy steel, and the first and second reinforcing ribs are welded and fixed inside the cavity of the flat steel body.
[0008] Preferably, a plurality of second reinforcing ribs are disposed in the grid unit formed by the first and second reinforcing ribs, and the second reinforcing ribs are made of spring steel.
[0009] Preferably, the protective layer is made of phosphate film material, which can improve the corrosion resistance and coating adhesion of the flat steel body, and the anti-corrosion layer is made of epoxy zinc-rich coating material.
[0010] Preferably, the wear-resistant layer is made of chemically plated nickel-phosphorus alloy material, which can significantly improve the wear resistance of the flat steel body.
[0011] Compared with the prior art, the beneficial effects of this utility model are: the fracture-resistant high-strength hot-rolled spring flat steel adopts a novel structural design, the specific details of which are as follows:
[0012] (1) By setting the first glass fiber and the second glass fiber in the flat steel body, the two are combined to form a grid structure, which can withstand a certain tensile and shear force. When the flat steel body is subjected to external force, the first glass fiber and the second glass fiber can share part of the stress and prevent the crack from propagating, thereby improving the fracture resistance of the flat steel body.
[0013] (2) By using the first and second reinforcing ribs set inside the flat steel body, the moment of inertia of the flat steel body can be increased, its bending and torsional resistance can be improved, and the flat steel body can better maintain its shape when under stress, reduce deformation, and thus reduce the risk of fracture.
[0014] (3) By setting a buffer cylinder between the first reinforcing rib and the second reinforcing rib, when the flat steel body is subjected to impact or vibration load, the buffer cylinder can absorb part of the energy through its own elastic deformation, thereby reducing the impact energy borne by the flat steel body and improving the fatigue resistance and seismic resistance of the flat steel body.
[0015] (4) The protective layer is in direct contact with the flat steel body and can form good chemical bonding or physical adsorption with the surface of the flat steel, thereby providing strong adhesion. The wear-resistant layer can form a hard protective film on the surface of the flat steel body, which can effectively resist mechanical actions such as friction, wear and erosion, reduce the wear degree of the flat steel surface, improve its wear resistance, and enable the spring to maintain good performance during long-term use. In addition, the anti-corrosion layer can isolate external corrosive media, thereby improving the corrosion resistance of the flat steel body and extending its service life. Attached Figure Description
[0016] Figure 1 This is a schematic diagram of the connection structure between the first glass fiber, the second glass fiber, and the flat steel body of this utility model;
[0017] Figure 2 This is a schematic diagram of the connection structure between the first reinforcing rib, the second reinforcing rib, and the flat steel body of this utility model;
[0018] Figure 3 This is a schematic diagram of the three-dimensional structure of the first reinforcing rib, the second reinforcing rib, and the buffer cylinder of this utility model;
[0019] Figure 4 This is a schematic diagram showing the separation structure of the protective layer, anti-corrosion layer, and wear-resistant layer of this utility model;
[0020] Figure 5 This utility model Figure 3 Enlarged structural diagram at point A in the middle;
[0021] Figure 6 This is a top view of the buffer cylinder structure of this utility model.
[0022] In the diagram: 1. Flat steel body; 2. First glass fiber; 3. Second glass fiber; 4. First reinforcing rib; 5. Second reinforcing rib; 6. Buffer cylinder; 7. Protective layer; 8. Anti-corrosion layer; 9. Wear-resistant layer. Detailed Implementation
[0023] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.
[0024] Please see Figures 1-6 The present invention provides the following technical solution: a high-strength hot-rolled spring flat steel that is resistant to breakage;
[0025] Example 1: To address the problem that existing hot-rolled spring flat steel is prone to excessive bending under bending loads, limiting its ability to withstand large external forces and making it unsuitable for high-load-bearing applications, and that cracks in hot-rolled spring flat steel propagate rapidly, reducing its toughness and making it susceptible to fatigue cracking failure under cyclic loading, the following solution is disclosed. Please refer to the following for details. Figures 1-3 and Figure 5 As shown, the device includes a flat steel body 1, with first glass fibers 2 and second glass fibers 3 respectively disposed on the outer side of the flat steel body 1. The first glass fibers 2 and second glass fibers 3 are distributed at equal intervals and alternately on the outer side of the flat steel body 1, and the first glass fibers 2 and second glass fibers 3 form a grid structure. The first glass fibers 2 and second glass fibers 3 are bonded to the outer side of the flat steel body 1 by adhesive. The device also includes a cavity inside the flat steel body 1, with first reinforcing ribs 4 and second reinforcing ribs 5 disposed at equal intervals inside the cavity. Multiple first reinforcing ribs 4 and second reinforcing ribs 5 are vertically intersected inside the cavity to form a grid. The first reinforcing ribs 4 and second reinforcing ribs 5 are made of high-strength alloy steel and are welded and fixed inside the cavity of the flat steel body 1.
[0026] By incorporating first glass fibers 2 and second glass fibers 3 into the flat steel body 1, the two fibers combine to form a mesh structure, which can withstand certain tensile and shear forces. When the flat steel body 1 is subjected to external forces, the first glass fibers 2 and second glass fibers 3 can share some of the stress, preventing crack propagation and thus improving the fracture resistance of the flat steel body 1. Furthermore, by utilizing the first reinforcing ribs 4 and second reinforcing ribs 5 inside the flat steel body 1, the moment of inertia of the flat steel body 1 can be increased, improving its bending and torsional resistance. This allows the flat steel body 1 to better maintain its shape under stress, reducing deformation and thus lowering the risk of fracture.
[0027] Example 2: Unlike Example 1, this example utilizes the buffer cylinder 6 to improve the fatigue resistance and seismic resistance of the flat steel body 1. See details... Figure 2 , Figure 3 , Figure 5 and Figure 6 As shown, buffer cylinders 6 are connected at equal intervals inside the flat steel body 1. Multiple first reinforcing ribs 4 and second reinforcing ribs 5 are vertically intersected to form a grid inside the cavity. The first reinforcing ribs 4 and second reinforcing ribs 5 are made of high-strength alloy steel and are welded and fixed inside the cavity of the flat steel body 1. Multiple second reinforcing ribs 5 are arranged in the grid unit formed by the first reinforcing ribs 4 and second reinforcing ribs 5 and are made of spring steel.
[0028] By setting a buffer cylinder 6 between the first reinforcing rib 4 and the second reinforcing rib 5, when the flat steel body 1 is subjected to impact or vibration load, the buffer cylinder 6 can absorb part of the energy through its own elastic deformation, thereby reducing the impact energy borne by the flat steel body 1 and improving the fatigue resistance and seismic resistance of the flat steel body 1.
[0029] Example 3: Unlike Example 2, this example utilizes the anti-corrosion layer 8 to improve the corrosion resistance of the flat steel body 1 and extend its service life. See details... Figure 4 As shown, the outer surface of the flat steel body 1 is coated with a protective layer 7, and the side of the protective layer 7 away from the flat steel body 1 is coated with an anti-corrosion layer 8. The side of the anti-corrosion layer 8 away from the protective layer 7 is coated with a wear-resistant layer 9. The protective layer 7 is made of phosphate film material, which can improve the corrosion resistance and coating adhesion of the flat steel body 1. The anti-corrosion layer 8 is made of epoxy zinc-rich coating material. The wear-resistant layer 9 is made of chemically plated nickel-phosphorus alloy material, which can significantly improve the wear resistance of the flat steel body 1.
[0030] The protective layer 7 is in direct contact with the flat steel body 1 and can form good chemical bonding or physical adsorption with the surface of the flat steel body 1, thereby providing strong adhesion. The wear-resistant layer 9 can form a hard protective film on the surface of the flat steel body 1, which can effectively resist mechanical actions such as friction, wear and erosion, reduce the wear degree of the surface of the flat steel body 1, improve its wear resistance, and enable the spring to maintain good performance during long-term use. Furthermore, the anti-corrosion layer 8 can isolate external corrosive media, thereby improving the corrosion resistance of the flat steel body 1 and extending its service life.
[0031] The contents not described in detail in this specification are existing technologies known to those skilled in the art.
[0032] Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.
Claims
1. A high-strength, fracture-resistant hot-rolled spring flat steel, comprising a flat steel body (1), wherein a first glass fiber (2) and a second glass fiber (3) are respectively disposed on the outer side of the flat steel body (1); characterized in that, Also includes: The flat steel body (1) has a cavity inside, and the cavity is provided with a first reinforcing rib (4) and a second reinforcing rib (5) at equal intervals. The flat steel body (1) is connected with buffer cylinders (6) at equal intervals inside. The outer surface of the flat steel body (1) is coated with a protective layer (7), and the side of the protective layer (7) away from the flat steel body (1) is coated with an anti-corrosion layer (8). The side of the anti-corrosion layer (8) away from the protective layer (7) is coated with a wear-resistant layer (9).
2. The high-strength hot-rolled spring flat steel with fracture resistance according to claim 1, characterized in that: The first glass fiber (2) and the second glass fiber (3) are distributed at equal intervals on the outside of the flat steel body (1), and the first glass fiber (2) and the second glass fiber (3) form a mesh structure. The first glass fiber (2) and the second glass fiber (3) are bonded to the outside of the flat steel body (1) by adhesive.
3. The high-strength hot-rolled spring flat steel with fracture resistance according to claim 1, characterized in that: Multiple first reinforcing ribs (4) and second reinforcing ribs (5) are vertically intersected to form a grid inside the cavity, and the first reinforcing ribs (4) and second reinforcing ribs (5) are made of high-strength alloy steel, and the first reinforcing ribs (4) and second reinforcing ribs (5) are welded and fixed inside the cavity of the flat steel body (1).
4. The high-strength hot-rolled spring flat steel with fracture resistance according to claim 1, characterized in that: Multiple second reinforcing ribs (5) are disposed in the grid unit formed by the first reinforcing rib (4) and the second reinforcing rib (5), and the second reinforcing rib (5) is made of spring steel.
5. The high-strength hot-rolled spring flat steel with fracture resistance according to claim 1, characterized in that: The protective layer (7) is made of phosphate film material, which can improve the corrosion resistance and coating adhesion of the flat steel body (1). The anti-corrosion layer (8) is made of epoxy zinc-rich coating material.
6. The high-strength hot-rolled spring flat steel with fracture resistance according to claim 1, characterized in that: The wear-resistant layer (9) is made of chemically plated nickel-phosphorus alloy material, which can significantly improve the wear resistance of the flat steel body (1).