Durable high-strength carbon spring steel wire

Abstract

The utility model discloses a durable high-strength carbon spring steel wire which comprises a carbon spring steel wire base body subjected to shot peening hardening treatment, the hardness of the carbon spring steel wire base body is not smaller than 900 HV, the surface roughness of the carbon spring steel wire base body does not exceed 3 micrometers, and the carbon spring steel wire base body is wound to form a cylindrical spiral spring structure. The hardness of the head end and the tail end of the carbon spring steel wire base body forming the supporting rings at the two ends of the cylindrical spiral spring is smaller than that of the middle section of the carbon spring steel wire forming the middle effective ring of the cylindrical spiral spring. According to the carbon spring steel wire, the surface roughness and hardness of the spring steel wire are optimized, the friction cracking of the steel wire is inhibited, and the durability is improved.

Description

Technical Field

[0001] This application relates to the field of spring steel wire technology, and in particular to a durable high-strength carbon spring steel wire. Background Technology

[0002] The core support structure of the spring pad consists of numerous springs, making them the primary material for its manufacture. Carbon steel spring wires distribute pressure through elastic deformation, providing uniform support and rapidly rebounding after pressure release to maintain the pad's shape. Since the spring pad needs to withstand loads for extended periods, the durability and high strength of the spring steel wire are crucial factors. However, under prolonged and repeated loads, the surface roughness of existing spring steel wires exceeds 4.5 micrometers, easily leading to high stress concentration, wire cracking, and poor durability. Furthermore, the surface hardness of the spring steel wire exceeds 1000 HV, resulting in frequent frictional cracking between the wires and poor fatigue resistance. Utility Model Content

[0003] This application addresses the shortcomings of existing technologies by providing a durable high-strength carbon spring steel wire that optimizes the surface roughness and hardness of the spring steel wire, inhibits friction cracking, and improves durability.

[0004] This application solves the above-mentioned technical problems through the following technical solutions.

[0005] Durable high-strength carbon spring steel wire, including a carbon spring steel wire matrix that has been shot-peened and hardened. The carbon spring steel wire matrix has a hardness of not less than 900 HV and a surface roughness of not more than 3 micrometers. The carbon spring steel wire matrix is ​​wound to form a cylindrical helical spring structure. The hardness of the first and last ends of the carbon spring steel wire matrix that form the support coils at both ends of the cylindrical helical spring is less than the hardness of the middle section of the carbon spring steel wire that forms the middle effective coil of the cylindrical helical spring.

[0006] Preferably, the hardness of the carbon spring steel wire matrix is ​​not greater than 1000HV.

[0007] Preferably, the cylindrical helical spring has 0.6 to 0.7 turns at both ends as a support coil.

[0008] Preferably, the surface roughness of the carbon spring steel wire matrix does not exceed 2 micrometers.

[0009] Preferably, the carbon spring steel wire base wire diameter is 2mm to 20mm.

[0010] The beneficial effects of this application are:

[0011] 1. By optimizing the surface roughness of the carbon spring steel wire matrix to no more than 3 micrometers, the problem of local stress concentration caused by roughness deviation is effectively suppressed when bearing load, which helps to improve fatigue resistance. At the same time, it helps to suppress friction cracking between steel wires and improve durability.

[0012] 2. By optimizing the strength of the carbon spring steel wire matrix, the hardness of the ends of the carbon spring steel wire matrix is ​​made lower than that of the middle section. The hardness of the carbon spring steel wire matrix is ​​not less than 900HV and not greater than 1000HV. The ends of the carbon spring steel wire matrix form the two end support rings of the cylindrical helical spring. The use of a hardness of 900HV, which is lower than that of the middle section, helps to improve corrosion resistance and durability. The middle section uses a hardness of close to 1000HV, which has better fatigue resistance, helps to improve fatigue resistance, provides high strength support and elasticity, and has better durability.

[0013] 3. By optimizing the surface roughness of the carbon spring steel wire matrix to no more than 3 micrometers, abnormal noise caused by contact friction between spring steel wires is suppressed, and durability is improved. Attached Figure Description

[0014] The accompanying drawings are intended to illustrate preferred embodiments and do not constitute a limitation on the scope of protection of this application.

[0015] Figure 1 This is a structural schematic diagram of an embodiment of this application;

[0016] In the diagram: 1-Carbon spring steel wire base, 2-First end, 3-Second end, 4-Middle section. Detailed Implementation

[0017] To make the objectives, technical solutions, and advantages of this application clearer, the following detailed description is provided in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the scope of this application.

[0018] like Figure 1 As shown in the embodiment of this application, the durable high-strength carbon spring steel wire includes a shot-peened hardened carbon spring steel wire matrix 1, the diameter of which is 2mm to 20mm. The hardness of the carbon spring steel wire matrix is ​​not less than 900HV and not greater than 1000HV. The surface roughness of the carbon spring steel wire matrix is ​​not more than 3 micrometers and not more than 2 micrometers.

[0019] A cylindrical helical spring structure is formed by winding carbon spring steel wire matrix. The number of support coils at both ends of the cylindrical helical spring is 0.6 to 0.7 coils. The hardness of the first end 2 and the last end 3 of the carbon spring steel wire matrix that constitute the support coils at both ends of the cylindrical helical spring is lower than the hardness of the middle section 4 of the carbon spring steel wire that constitutes the middle effective coil of the cylindrical helical spring.

[0020] The embodiments described above are merely illustrative of several implementation methods of this application, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the patent application. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this application, and these all fall within the protection scope of this application. Therefore, the protection scope of this patent application should be determined by the appended claims.

Claims

1. Durable high-strength carbon spring steel wire, characterized by: The carbon spring steel wire matrix (1) is shot peened and hardened. The hardness of the carbon spring steel wire matrix is ​​not less than 900HV and the surface roughness of the carbon spring steel wire matrix is ​​not more than 3 micrometers. The carbon spring steel wire matrix is ​​wound to form a cylindrical helical spring structure. The hardness of the first end (2) and the last end (3) of the carbon spring steel wire matrix that form the support rings at both ends of the cylindrical helical spring is less than the hardness of the middle section (4) of the carbon spring steel wire that forms the middle effective ring of the cylindrical helical spring.

2. The durable high-strength carbon spring steel wire according to claim 1, characterized in that: The hardness of the carbon spring steel wire matrix is ​​not greater than 1000HV.

3. The durable high-strength carbon spring steel wire according to claim 1, characterized in that: The cylindrical helical spring has 0.6 to 0.7 coils at both ends for support.

4. The durable high-strength carbon spring steel wire according to claim 1, characterized in that: The surface roughness of the carbon spring steel wire matrix does not exceed 2 micrometers.

5. The durable high-strength carbon spring steel wire according to claim 1, characterized in that: The base wire diameter of carbon spring steel wire ranges from 2mm to 20mm.

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