Heat-resistant alloy steel 15CrMo hot-rolled steel strip

Abstract

This utility model relates to the field of hot-rolled steel strip structure technology, specifically to 15CrMo heat-resistant alloy steel hot-rolled steel strip, including a steel strip body. The upper surface of the steel strip body is uniformly distributed with anti-slip raised patterns, which are strip-shaped and parallel to the length direction of the steel strip body. The two sides of the steel strip body are provided with arc-shaped reinforcing edges, which curve downwards towards the steel strip body. The steel strip body has a thickness of 2-6 mm, a width of 1000-1500 mm, and a length of 200-500 mm. The steel strip body is wound and fixed to the outside of a fixed cylinder. This utility model effectively improves the anti-slip performance of the steel strip by setting strip-shaped anti-slip raised patterns on the upper surface of the steel strip body, preventing slippage during transportation, installation, and use, and ensuring assembly accuracy and operational stability. The arc-shaped reinforcing edges on both sides of the steel strip body can disperse edge stress, prevent edge cracking and deformation, and simultaneously improve edge wear resistance, extending the service life of the steel strip.

Description

Technical Field

[0001] This utility model relates to the field of hot-rolled steel strip structure technology, specifically to 15CrMo heat-resistant alloy steel hot-rolled steel strip. Background Technology

[0002] 15CrMo heat-resistant alloy steel is widely used in high-temperature fields such as petroleum, chemical, and power due to its excellent high-temperature strength, heat resistance, and oxidation resistance. The hot-rolled steel strip made from it is a core component of many industrial equipment.

[0003] However, existing 15CrMo hot-rolled steel strips still have many shortcomings in practical applications: on the one hand, the surface of the steel strip is smooth, which makes it easy to slip during transportation, installation and use, affecting assembly accuracy and stability; on the other hand, the edges of the steel strip are mostly right-angled structures, which can easily cause stress concentration during handling, cutting and long-term stress, leading to cracking, deformation and other problems, reducing the service life of the steel strip; in addition, the dimensional accuracy and surface quality control of some existing steel strips are not good, making it difficult to meet the needs of high-precision industrial equipment. Utility Model Content

[0004] In view of the above-mentioned shortcomings of the existing technology, the present invention provides a 15CrMo hot-rolled heat-resistant alloy steel strip, which can effectively solve the problems in the existing technology.

[0005] This utility model provides a heat-resistant alloy steel 15CrMo hot-rolled steel strip, including a steel strip body. The upper surface of the steel strip body is uniformly distributed with anti-slip raised patterns, which are strip-shaped and parallel to the length direction of the steel strip body. The two sides of the steel strip body are provided with arc-shaped reinforcing edges, which are bent downwards. The thickness of the steel strip body is 2.0-6.0 mm, the width is 1000-1500 mm, and the length is 200-500 mm. The steel strip body is wound and fixed to the outside of a fixed cylinder.

[0006] Furthermore, the height of the anti-slip ridges is 0.1-0.3mm, and the distance between two adjacent anti-slip ridges is 5-10mm.

[0007] Furthermore, the radius of the arc-shaped reinforcing edge is 1-3mm, and the width of the arc-shaped reinforcing edge is 5-10mm.

[0008] Furthermore, the thickness tolerance of the steel strip body is ±0.05mm, the width tolerance is ±2.0mm, and the thickness of the arc-shaped reinforcing edge is consistent with the thickness of the steel strip body.

[0009] Furthermore, the surface roughness Ra of the steel strip body is ≤3.2μm, the surface roughness of the anti-slip embossing is consistent with the surface roughness of the steel strip body, and the surface is free of cracks, folds, scars and inclusions.

[0010] Furthermore, the steel strip body is subjected to online normalizing treatment after hot rolling. The normalizing temperature is 900-950℃, the holding time is 15-30min, and the cooling rate is 5-10℃ / s. The treated steel strip body has a tensile strength ≥440MPa, a yield strength ≥295MPa, and an elongation after fracture ≥22%.

[0011] Compared with the prior art, the beneficial effects of this utility model are as follows: By setting strip-shaped anti-slip ridges on the upper surface of the steel strip body, this utility model effectively improves the anti-slip performance of the steel strip, avoids slippage during transportation, installation and use, and ensures assembly accuracy and usage stability; the arc-shaped reinforcing edges on both sides of the steel strip body can disperse edge stress, prevent edge cracking and deformation, and at the same time improve edge wear resistance and extend the service life of the steel strip. In this device, the dimensional tolerances, surface roughness, and mechanical properties of the steel strip are strictly controlled to ensure that the steel strip has excellent dimensional accuracy and performance, making it suitable for the use of high-precision industrial equipment. Through a reasonable online normalizing process, the grains are refined and the mechanical properties of the steel strip are improved. Combined with the heat resistance of 15CrMo alloy steel itself, the steel strip can be stably used in high-temperature conditions and has a wide range of applications. Attached Figure Description

[0012] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0013] Figure 1 This is a schematic diagram of the structure of this utility model; Figure 2 This is an exploded view of the structure of this utility model; Figure 3 for Figure 2 A schematic diagram of the structure at point A in the middle.

[0014] The labels in the diagram represent: 1. Steel strip; 2. Reinforcing edge; 3. Anti-slip embossed pattern; 4. Fixing cylinder. Detailed Implementation

[0015] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this utility model. All other embodiments obtained by those skilled in the art based on the embodiments of this utility model without creative effort are within the scope of protection of this utility model.

[0016] The present invention will be further described below with reference to the embodiments.

[0017] Example 1: 15CrMo heat-resistant alloy steel hot-rolled strip, refer to the attached document. Figure 1 -Appendix Figure 3 The steel strip body includes a steel strip body, the upper surface of which is uniformly distributed with anti-slip ridges, which are strip-shaped and parallel to the length direction of the steel strip body; the two sides of the steel strip body are provided with arc-shaped reinforcing edges, which are curved downwards towards the steel strip body. The steel strip body has a thickness of 2.0 mm, a width of 1000 mm, and a length of 200 m. The height of the anti-slip ridges is 0.1 mm, and the spacing between two adjacent anti-slip ridges is 5 mm. The radius of the arc-shaped reinforcing edge is 1 mm, and the width is 5 mm. The thickness tolerance of the steel strip body is ±0.05 mm, and the width tolerance is ±2.0 mm. The thickness of the arc-shaped reinforcing edge is the same as the thickness of the steel strip body. The surface roughness Ra of the steel strip body is ≤3.2 μm, and the surface roughness of the anti-slip ridges is the same as that of the steel strip body. The surface is free of cracks, folds, scars, and inclusions. After hot rolling, the steel strip body undergoes online normalizing treatment at a normalizing temperature of 900℃, a holding time of 15 min, and a cooling rate of 5℃ / s. The tensile strength of the treated steel strip body is 440 MPa, the yield strength is 295 MPa, and the elongation after fracture is 22%.

[0018] Example 2: A heat-resistant alloy steel 15CrMo hot-rolled steel strip, comprising a steel strip body, wherein the upper surface of the steel strip body is uniformly distributed with anti-slip raised patterns, the anti-slip raised patterns are strip-shaped and parallel to the length direction of the steel strip body; the two sides of the steel strip body are provided with arc-shaped reinforcing edges, the arc-shaped reinforcing edges are bent downwards towards the steel strip body. The steel strip body has a thickness of 4.0 mm, a width of 1250 mm, and a length of 350 mm. The height of the anti-slip ridges is 0.2 mm, and the spacing between two adjacent anti-slip ridges is 7.5 mm. The radius of the arc-shaped reinforcing edge is 2 mm, and the width is 7.5 mm. The thickness tolerance of the steel strip body is ±0.05 mm, and the width tolerance is ±2.0 mm. The thickness of the arc-shaped reinforcing edge is the same as that of the steel strip body. The surface roughness Ra of the steel strip body is ≤3.2 μm, and the surface roughness of the anti-slip ridges is the same as that of the steel strip body. The surface is free of cracks, folds, scars, and inclusions. After hot rolling, the steel strip body undergoes online normalizing treatment at a normalizing temperature of 925℃, a holding time of 22.5 min, and a cooling rate of 7.5℃ / s. The tensile strength of the treated steel strip body is 460 MPa, the yield strength is 310 MPa, and the elongation after fracture is 24%.

[0019] Example 3: A heat-resistant alloy steel 15CrMo hot-rolled steel strip includes a steel strip body. The upper surface of the steel strip body is uniformly distributed with anti-slip ridges, which are strip-shaped and parallel to the length direction of the steel strip body. The two sides of the steel strip body are provided with arc-shaped reinforcing edges, which are bent downwards towards the steel strip body. The steel strip body has a thickness of 6.0 mm, a width of 1500 mm, and a length of 500 m. The height of the anti-slip ridges is 0.3 mm, and the spacing between two adjacent anti-slip ridges is 10 mm. The radius of the arc-shaped reinforcing edge is 3 mm, and the width is 10 mm. The thickness tolerance of the steel strip body is ±0.05 mm, and the width tolerance is ±2.0 mm. The thickness of the arc-shaped reinforcing edge is the same as that of the steel strip body. The surface roughness Ra of the steel strip body is ≤3.2 μm, and the surface roughness of the anti-slip ridges is the same as that of the steel strip body. The surface is free of cracks, folds, scars, and inclusions. After hot rolling, the steel strip body undergoes online normalizing treatment at a normalizing temperature of 950℃, a holding time of 30 min, and a cooling rate of 10℃ / s. The tensile strength of the treated steel strip body is 480 MPa, the yield strength is 325 MPa, and the elongation after fracture is 26%.

[0020] The above embodiments are only used to illustrate the technical solutions of this utility model, and are not intended to limit it. Although this utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions will not cause the essence of the corresponding technical solutions to deviate from the protection scope of the technical solutions of the embodiments of this utility model.

Claims

1. A heat-resistant alloy steel 15CrMo hot-rolled strip, characterized in that, The steel strip body (1) is provided with anti-slip ridges (3) evenly distributed on its upper surface. The anti-slip ridges (3) are strip-shaped and parallel to the length direction of the steel strip body (1). The two sides of the steel strip body (1) are provided with arc-shaped reinforcing edges (2), which are bent downwards towards the steel strip body (1). The steel strip body (1) has a thickness of 2.0-6.0 mm, a width of 1000-1500 mm, and a length of 200-500 m. The steel strip body (1) is wrapped and fixed to the outside of the fixing cylinder (4).

2. The heat-resistant alloy steel 15CrMo hot-rolled strip according to claim 1, characterized in that, The height of the anti-slip ridge (3) is 0.1-0.3mm, and the distance between two adjacent anti-slip ridges (3) is 5-10mm.

3. The heat-resistant alloy steel 15CrMo hot-rolled strip according to claim 1, characterized in that, The radius of the arc-shaped reinforcing edge (2) is 1-3mm, and the width of the arc-shaped reinforcing edge (2) is 5-10mm.

4. The heat-resistant alloy steel 15CrMo hot-rolled strip according to claim 1, characterized in that, The thickness tolerance of the steel strip body (1) is ±0.05mm, the width tolerance is ±2.0mm, and the thickness of the arc-shaped reinforcing edge (2) is consistent with the thickness of the steel strip body (1).

5. The heat-resistant alloy steel 15CrMo hot-rolled strip according to claim 4, characterized in that, The surface roughness Ra of the steel strip body (1) is ≤3.2μm, and the surface roughness of the anti-slip ridge (3) is consistent with the surface roughness of the steel strip body (1). The surface is free of cracks, folds, scars and inclusions.

6. The heat-resistant alloy steel 15CrMo hot-rolled strip according to claim 1, characterized in that, The steel strip body (1) is subjected to online normalization treatment after hot rolling. The normalization temperature is 900-950℃, the holding time is 15-30min, and the cooling rate is 5-10℃ / s. The treated steel strip body (1) has a tensile strength ≥440MPa, a yield strength ≥295MPa, and an elongation after fracture ≥22%.

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