High-toughness anti-fracture cold-drawn steel

Abstract

This invention discloses a high-toughness, fracture-resistant cold-drawn steel profile, comprising a cold-drawn steel body, the upper surface of which is respectively pre-set with an upper slot one and an upper slot two. By pre-setting corresponding overlapping slots on the upper and lower top and bottom surfaces of the cold-drawn steel body, the two sets of slots are staggered to achieve stable limiting overlap between adjacent sets of cold-drawn steel bodies, ensuring that misalignment is avoided when the two sets of cold-drawn steel bodies are stacked. Combined with the limiting insertion between the convex inserts on both sides of the cold-drawn steel body and the U-shaped mounting frame, precise lateral positioning and installation of the cold-drawn steel body is achieved. Multiple sets of arranged threaded posts further stabilize the two laterally inserted sets. This invention solves the problems of poor impact resistance and low toughness of existing cold-drawn steel profiles, and the tendency for misalignment and damage caused by friction and collision between steel profiles during transportation, thus improving the impact resistance and toughness of cold-drawn steel profiles.

Description

Technical Field

[0001] This invention belongs to the field of cold-drawn steel technology, specifically relating to a high-toughness, fracture-resistant cold-drawn steel. Background Technology

[0002] Cold-drawn steel is steel of various cross-sectional shapes and sizes that has been cold-drawn. It is also known as cold-drawn steel or cold-drawn steel. It can be used to support the automotive industry, hardware tool industry, machinery manufacturing industry, and textile machinery manufacturing industry. It has been widely used in machine tool manufacturing, and therefore cold-drawn steel is needed.

[0003] In the existing technology, cold-drawn steel is widely used in the construction industry. It is mainly used as the plate for assembling frame structures, and adjacent cold-drawn steel plates are fixed by welding or bolts.

[0004] However, it is not convenient to improve the toughness and impact resistance of cold-drawn steel. Generally, cold-drawn steel has poor impact resistance and low toughness, so during transportation, the steel is prone to misalignment and damage due to friction and collision between the steel sections, resulting in breakage.

[0005] Therefore, we propose a high-toughness, fracture-resistant cold-drawn steel to address the problems of poor impact resistance and low toughness of existing cold-drawn steel, as well as the tendency for misalignment and damage caused by friction and collision between steel sections during transportation, which can improve the impact resistance and toughness of cold-drawn steel. Summary of the Invention

[0006] To address the shortcomings of existing technologies, the purpose of this invention is to provide a high-toughness, fracture-resistant cold-drawn steel profile with the advantages of strong impact resistance and high toughness.

[0007] To achieve the above object, the present invention provides the following technical solution: a high-toughness anti-fracture cold-drawn steel section, including a cold-drawn steel section body. On the upper surface of the cold-drawn steel section body, upper slot one and upper slot two are respectively preset. Upper slot one and upper slot two are symmetrically distributed about the central axis of the cold-drawn steel section body. On the outer surfaces of the upper and lower sides of the cold-drawn steel section body, reinforcing rib strips are respectively connected. The reinforcing rib strips are arranged in an equidistant array. On the lower inner walls of the cold-drawn steel section body far from upper slot one and upper slot two, lower slots are respectively preset. The lower slots at the lower ends of a group of cold-drawn steel section bodies are movably lapped with upper slot one and upper slot two at the upper ends of the other group of cold-drawn steel section bodies. On the outer surface of one side of the cold-drawn steel section body, mounting edge slot one is opened. On the inner surface of mounting edge slot one, a U-shaped mounting groove frame is fixedly installed. On the inner wall of the cold-drawn steel section body far from mounting edge slot one, mounting edge slot two is opened. On the inner surface of mounting edge slot two, an embedding groove frame is fixedly installed. The embedding groove frame is integrally in a structure of two symmetrically connected "匚"-shaped strips. On the outer surface of one end of the cold-drawn steel section body, end insertion blocks are fixedly installed. The number of the end insertion blocks is set to two groups. The two groups of end insertion blocks are symmetrically distributed about the vertical midline of the cold-drawn steel section body, and the end insertion blocks are in a right trapezoidal structure.

[0008] Preferably, the outer surface of the U-shaped mounting groove frame is fitted and installed with the inner wall of mounting edge slot one. On the outer side inner wall of mounting edge slot one, a frame inner slot for auxiliary limiting is opened. The U-shaped mounting groove frame is integrally in a "匚"-shaped strip structure. On the outer surface of the side of the U-shaped mounting groove frame far from the frame inner slot, parallel insertion block one is fixedly added. The number of parallel insertion block one is two. Parallel insertion block one is symmetrically distributed about the horizontal midline of the U-shaped mounting groove frame.

[0009] Preferably, a threaded insertion column is threaded through the inner wall of the U-shaped mounting groove frame. The outer surfaces of the upper and lower ends of the threaded insertion column respectively penetrate through the inner surface of a reserved insertion slot preset on the inner wall of the cold-drawn steel section body.

[0010] Preferably, a convex-shaped embedding strip is movably inserted into the inner surface of the embedding groove frame. The convex-shaped embedding strip is integrally in a vertically placed "凸"-shaped strip structure. On the inner wall of the convex-shaped embedding strip, an adapted thread groove is preset, and the inner wall of the adapted thread groove is threadedly connected with the outer surface of the threaded insertion column.

[0011] Preferably, on the outer surface of the side of the embedding groove frame far from the convex-shaped embedding strip, parallel insertion block two is fixedly added. Parallel insertion block two is symmetrically distributed about the horizontal midline of the embedding groove frame.

[0012] Preferably, the inner wall of the end of the cold-drawn steel body away from the end plug is pre-set with a corresponding off-end slot. The inner wall of the off-end slot is inserted into the outer surface of the end plug. The off-end slot is set in two sets, and the off-end slot as a whole is a recessed right-angled trapezoidal groove surface. An auxiliary welding component is provided on the inner wall of the off-end slot.

[0013] Preferably, the outer surface of the cold-drawn steel body is provided with a wear-resistant layer, which is a high-manganese steel plate. The inner layer of the wear-resistant layer is provided with a crack-resistant layer, which is a tear-resistant steel plate, and the tear-resistant steel plate is provided with a tough anti-breakage component inside.

[0014] Preferably, the inner side of the anti-crack layer is provided with an impact-resistant layer and a high-compression-resistant layer, both of which are made of high-strength, high-compression-resistant galvanized steel sheet.

[0015] Compared with the prior art, the beneficial effects of the present invention are:

[0016] By pre-setting corresponding overlapping slots on the top and bottom surfaces of the cold-drawn steel body, the upper and lower sets of slots are staggered to achieve stable limiting overlap between adjacent sets of cold-drawn steel bodies, ensuring that the two sets of cold-drawn steel bodies do not misalign when stacked. Combined with the limiting insertion between the convex inserts on both sides of the cold-drawn steel body and the U-shaped installation slot frame, the lateral position of the cold-drawn steel body is accurately positioned and installed. Multiple sets of threaded pins are arranged to further stabilize the two sets of laterally inserted parts. This solves the problems of poor impact resistance and low toughness of existing cold-drawn steel, and the easy misalignment and damage caused by friction and collision between steel sections during transportation, which can improve the impact resistance and toughness of cold-drawn steel. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the structure of the present invention;

[0018] Figure 2 This is a schematic diagram of the structure when the two sets of cold-drawn steel bodies of the present invention are stacked one on top of the other;

[0019] Figure 3 This is a schematic diagram of the structure of four sets of cold-drawn steel bodies stacked together according to the present invention;

[0020] Figure 4 This is a schematic diagram showing the disassembled structure of the two sets of cold-drawn steel bodies of the present invention;

[0021] Figure 5 For the present invention Figure 4 A magnified structural diagram at point A;

[0022] Figure 6 This is a schematic diagram showing the disassembled structure of the two sets of cold-drawn steel bodies of the present invention;

[0023] Figure 7 For the present invention Figure 6 A magnified structural diagram at point B;

[0024] Figure 8 This is a schematic diagram of the disassembly structure of the end plug and the off-end slot of the present invention;

[0025] Figure 9 This is a cross-sectional view of the two sets of cold-drawn steel bodies of the present invention when they are stacked together.

[0026] Figure 10 This is a partial cross-sectional view of the anti-lamellar tear steel plate of the present invention.

[0027] Figure 11 This is a partial three-dimensional exploded view of the toughness and fracture prevention component of the present invention.

[0028] In the diagram: 1. Cold-drawn steel body; 2. Reinforcing rib; 3. Upper slot one; 31. Lower slot; 4. Upper slot two; 5. Mounting side slot one; 6. U-shaped mounting frame; 7. Inset slot within the frame; 8. Parallel insert one; 9. Threaded post; 91. Reserved slot; 10. Protruding insert strip; 11. Adaptive threaded groove; 12. Mounting side slot two; 13. Mounting frame; 14. Parallel insert two; 15. End insert; 16. Off-end slot; 17. Welding reserved hole; 18. Diamond-shaped anti-crack strip; 19. Corrugated elastic strip; 20. Central connecting strip; 21. Hollow groove. Detailed Implementation

[0029] To make the objectives, technical solutions, and advantages of the present invention clear and complete, the embodiments of the present invention will be further described in detail below with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are only some, not all, embodiments of the present invention, and are merely illustrative of the embodiments of the present invention. They are not intended to limit the embodiments of the present invention. All other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0030] Example 1

[0031] Please see Figures 1 to 11, the present invention provides a technical solution: a high-toughness fracture-proof cold-drawn steel section, including a cold-drawn steel section body 1. Upper card slots 3 and upper card slots 4 are respectively preset on the upper surface of the cold-drawn steel section body 1. The upper card slots 3 and the upper card slots 4 are symmetrically distributed about the central axis of the cold-drawn steel section body 1. Reinforcing rib strips 2 are respectively connected to the outer surfaces on both the upper and lower sides of the cold-drawn steel section body 1, and the reinforcing rib strips 2 are arranged in an equidistant array. Lower card slots 31 are respectively preset on the inner walls at the lower ends of the cold-drawn steel section body 1 far from the upper card slots 3 and the upper card slots 4. The lower card slots 31 at the lower ends of a group of cold-drawn steel section bodies 1 are movably lapped with the upper card slots 3 and the upper card slots 4 at the upper ends of another group of cold-drawn steel section bodies 1. An installation edge groove 5 is opened on the outer surface of one side of the cold-drawn steel section body 1, and a U-shaped installation groove frame 6 is fixedly installed on the inner surface of the installation edge groove 5. An installation edge groove 12 is opened on the inner wall of the side of the cold-drawn steel section body 1 far from the installation edge groove 5, and an embedded groove frame 13 is fixedly installed on the inner surface of the installation edge groove 12. The embedded groove frame 13 is integrally in a structure of two symmetrically connected "匚"-shaped strips. End insertion blocks 15 are fixedly installed on the outer surface of one end of the cold-drawn steel section body 1. The number of the end insertion blocks 15 is set to two groups, and the two groups of end insertion blocks 15 are symmetrically distributed about the vertical center line of the cold-drawn steel section body 1, and the end insertion blocks 15 are in a right trapezoidal structure. The outer surface of the U-shaped installation groove frame 6 is embedded and installed with the inner wall of the installation edge groove 5. Frame inner grooves 7 for auxiliary limiting are opened on the outer side inner wall of the installation edge groove 5. The U-shaped installation groove frame 6 is integrally in a "匚"-shaped strip structure. Parallel insertion blocks 1 are fixedly added to the outer surface of the U-shaped installation groove frame 6 far from the frame inner grooves 7. The number of the parallel insertion blocks 1 is two, and the parallel insertion blocks 1 are symmetrically distributed about the horizontal center line of the U-shaped installation groove frame 6. A threaded insertion column 9 is threaded through the inner wall of the U-shaped installation groove frame 6. The outer surfaces at the upper and lower ends of the threaded insertion column 9 respectively penetrate through the inner surface of a reserved slot 91 preset on the inner wall of the cold-drawn steel section body 1. By presetting corresponding lapping card slots on the upper and lower top surfaces and the bottom surface of the cold-drawn steel section body 1, and the upper and lower two groups of card slots are correspondingly staggered, stable limiting lapping of two adjacent cold-drawn steel section bodies 1 can be realized, meeting the requirement that the two groups of cold-drawn steel section bodies 1 avoid misalignment when stacked. With the limiting insertion between the convex strip 10 on both sides of the cold-drawn steel section body 1 and the U-shaped installation groove frame 6, precise positioning installation of the lateral position of the cold-drawn steel section body 1 is realized. By using a plurality of arranged threaded insertion columns 9 to penetrate through the correspondingly preset reserved slots 91 one by one, the threaded insertion columns 9 successively penetrate through the inner walls of the preset adapted screw grooves 11 on the upper surface of the cold-drawn steel section body 1, the inner wall of the U-shaped installation groove frame 6, and the inner wall of the convex strip 10, and are manually rotated for threaded assembly to further stabilize the two groups of lateral insertions, further solving the problems of poor impact resistance and low toughness of the existing cold-drawn steel section, and when being transported, it is easy for the steel sections to be misaligned and damaged due to friction and collision between each other, resulting in fracture, and improving the impact resistance and toughness of the cold-drawn steel section.

[0032] Embodiment 2

[0033] See attached document Figure 1-11 Based on Embodiment 1, in order to achieve precise positioning and installation of adjacent cold-drawn steel sections, a convex insert 10 is movably inserted into the inner surface of the mounting slot frame 13. The convex insert 10 is a vertically placed "convex" shaped strip structure. The inner wall of the convex insert 10 is pre-set with an adapter screw groove 11, and the inner wall of the adapter screw groove 11 is threadedly connected to the outer surface of the threaded insert 9. A parallel insert block 2 14 is fixedly added to the outer surface of the mounting slot frame 13 away from the convex insert 10. The parallel insert block 2 14 is symmetrically distributed about the horizontal center line of the mounting slot frame 13. The inner wall of the cold-drawn steel body 1 away from the end insert 15 is pre-set with a corresponding end slot 16. The inner wall of the end slot 16 is correspondingly inserted into the outer surface of the end insert 15. The end slot 16 is set in two sets, and the end slot 16 is a recessed right-angled trapezoidal groove surface. An auxiliary welding component is provided on the inner wall of the end slot 16.

[0034] By pre-installing a second side groove 12 on the inner wall of the cold-drawn steel body 1 away from the first side groove 5, and then installing the mounting frame 13 on the inner side of the second side groove 12, and opening an adapter screw groove 11 for auxiliary limiting installation on the inner wall of the outer side of the convex insert 10 pre-installed inside the mounting frame 13, the threaded insert 9 can be passed through in sequence. With the addition of an end plug 15 fixed at the opposite end of a set of cold-drawn steel bodies 1, when it is necessary to connect another set of cold-drawn steels at the end of the cold-drawn steel body, the end plug 15 is aligned with the opposite end slot 16 at one end of the other set of cold-drawn steel bodies 1 to complete the rapid positioning. This further solves the problems of poor impact resistance and low toughness of existing cold-drawn steels, and the easy occurrence of misalignment and damage caused by friction and collision between steels during transportation, which can improve the impact resistance and toughness of cold-drawn steels.

[0035] Example 3

[0036] See attached document Figure 1-11 Based on Example 2, in order to improve the impact resistance and toughness of cold-drawn steel, the outer surface of the cold-drawn steel body 1 is provided with a wear-resistant layer material, which is a high-manganese steel plate. The inner layer of the wear-resistant layer material is provided with a crack-resistant layer material, which is a tear-resistant steel plate. The tear-resistant steel plate is provided with a tough anti-breakage component inside. The inner side of the crack-resistant layer material is provided with an impact-resistant layer material and a high-compression-resistant layer material. Both the impact-resistant layer material and the high-compression-resistant layer material are made of high-strength compression-resistant galvanized steel plate.

[0037] Through the penetration and cooperation of wear-resistant layer material, anti-cracking layer material, anti-impact layer material and high compressive strength layer material, the strength and anti-impact performance of the cold-drawn steel body 1 itself can be enhanced, preventing fractures during actual use, and further solving the problems of poor impact resistance and low toughness of existing cold-drawn steel, and during transportation, it is easy for the steel to be misaligned and damaged due to friction and collision between each other, resulting in fractures. It can improve the impact resistance and toughness of cold-drawn steel.

[0038] Example 4

[0039] Refer to the appendix Figure 1-11 , on the basis of Example 3, this example adds an auxiliary welding component:

[0040] The auxiliary welding component includes a welding reserved hole 17, the welding reserved hole 17 penetrates the inner wall of the different-end slot 16, and the reserved space of the welding reserved hole 17 is larger than the slot depth of the different-end slot 16, and the welding reserved hole 17 is integrally in an inverted "L"-shaped groove structure;

[0041] Through the addition of the auxiliary welding component, when welding two groups of cold-drawn steel, only need to align the welding reserved hole 17 for the welding core solder, and the melted solder is poured into from the welding reserved hole 17, so that the end plug 15 and the different-end slot 16 are firmly connected. It further solves the problems of poor impact resistance and low toughness of existing cold-drawn steel, and during transportation, it is easy for the steel to be misaligned and damaged due to friction and collision between each other, resulting in fractures. It can improve the impact resistance and toughness of cold-drawn steel.

[0042] Example 5

[0043] Refer to the appendix Figure 1-11 , on the basis of Example 4, this example adds a toughness anti-breaking component:

[0044] The toughness anti-breaking component includes a rhombic anti-cracking strip 18, the rhombic anti-cracking strips 18 are arranged in a rhombic array as a whole, a central connecting strip 20 is fixedly added to the central surface of the rhombic anti-cracking strip 18, and a hollow groove 21 penetrating and connecting with the inner wall of the rhombic anti-cracking strip 18 is reserved on the inner wall of the central connecting strip 20. The hollow groove 21 is set in a "mouth"-shaped groove structure, and the two ends of the wavy elastic strip 19 are symmetrically distributed with the rhombic anti-cracking strips 18;

[0045] The arrangement of rhomboid anti-crack strips 18, with multiple sets of rhomboid structures connected, is to avoid deformation tolerance of the internal layers when subjected to external impact. Combined with the addition of corrugated elastic strips 19, the ends of the rhomboid anti-crack strips 18 are limited, thus preventing longitudinal deformation. When the rhomboid anti-crack strips 18 are under prestress, the central connecting strip 20 provides lateral tension and limitation, preventing lateral deformation. This ensures that the cold-drawn steel possesses both toughness and compressive strength, further solving the problems of poor impact resistance and low toughness in existing cold-drawn steel, and the tendency for misalignment and damage caused by friction and collision between steel sections during transportation, leading to breakage. This improves the impact resistance and toughness of cold-drawn steel.

[0046] Working principle and usage process of this invention:

[0047] First, corresponding overlapping slots are pre-set on the top and bottom surfaces of the cold-drawn steel body 1. The two sets of slots are staggered to achieve stable limiting overlap between adjacent sets of cold-drawn steel bodies 1, ensuring that misalignment does not occur when the two sets of cold-drawn steel bodies 1 are stacked. Combined with the limiting insertion between the convex inserts 10 on both sides of the cold-drawn steel body 1 and the U-shaped mounting frame 6, precise lateral positioning and installation of the cold-drawn steel body 1 is achieved. Then, when connecting two adjacent sets of cold-drawn steel bodies 1 on the side, the mounting frame 13 is installed correspondingly inside the mounting side groove 12, and the convex inserts pre-installed inside the mounting frame 13 are... An adapter screw groove 11 for auxiliary limiting installation is opened on the inner wall of the outer side of the insert 10, which sequentially realizes the penetration of the threaded insert 9. With the addition of an end plug 15 for fixing the opposite end of a set of cold-drawn steel body 1, when it is necessary to connect another set of cold-drawn steel at the end of the cold-drawn steel, the end plug 15 is aligned with the opposite end slot 16 at one end of the other set of cold-drawn steel body 1 to complete the quick positioning. Furthermore, when it is necessary to weld the two sets of cold-drawn steel that are connected longitudinally, it is only necessary to align the welding reserved hole 17 with the welding core solder. The molten solder is poured into the welding reserved hole 17, thereby making the end plug 15 and the opposite end slot 16 firmly connected.

[0048] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A high-toughness, fracture-resistant cold-drawn steel profile, comprising a cold-drawn steel body (1), characterized in that: On the upper surface of the cold-drawn steel section body (1), upper slot one (3) and upper slot two (4) are respectively preset. The upper slot one (3) and the upper slot two (4) are symmetrically distributed about the central axis of the cold-drawn steel section body (1). On the outer surfaces of the upper and lower sides of the cold-drawn steel section body (1), reinforcing rib strips (2) are respectively connected. The reinforcing rib strips (2) are arranged in an equidistant array. On the lower inner walls of the cold-drawn steel section body (1) far from the upper slot one (3) and the upper slot two (4), lower slots (31) are respectively preset. The lower slots (31) at the lower ends of a group of cold-drawn steel section bodies (1) are movably lapped with the upper slot one (3) and the upper slot two (4) at the upper ends of the other group of cold-drawn steel section bodies (1). On the outer surface of one side of the cold-drawn steel section body (1), an installation side groove one (5) is opened. On the inner surface of the installation side groove one (5), a U-shaped installation groove frame (6) is fixedly installed. On the inner wall of the cold-drawn steel section body (1) far from the installation side groove one (5), an installation side groove two (12) is opened. On the inner surface of the installation side groove two (12), an embedded groove frame (13) is fixedly installed. The embedded groove frame (13) is integrally in the shape of two symmetrically connected "匚"-shaped strip structures. On the outer surface of one end of the cold-drawn steel section body (1), end insertion blocks (15) are fixedly installed. The number of the end insertion blocks (15) is set to two groups. The two groups of end insertion blocks (15) are symmetrically distributed about the vertical center line of the cold-drawn steel section body (1), and the end insertion blocks (15) are in the shape of a right trapezoid structure.

2. The high-toughness, fracture-resistant cold-drawn steel according to claim 1, characterized in that: The outer surface of the U-shaped installation groove frame (6) is embedded and installed with the inner wall of the installation side groove one (5). On the outer side inner wall of the installation side groove one (5), a frame inner embedded groove (7) for auxiliary limiting is opened. The U-shaped installation groove frame (6) is integrally in the shape of a "匚"-shaped strip structure. On the outer surface of the side of the U-shaped installation groove frame (6) far from the frame inner embedded groove (7), parallel insertion blocks one (8) are fixedly added. The number of the parallel insertion blocks one (8) is two. The parallel insertion blocks one (8) are symmetrically distributed about the horizontal center line of the U-shaped installation groove frame (6).

3. The high-toughness, fracture-resistant cold-drawn steel according to claim 2, characterized in that: A threaded insertion column (9) is threaded through the inner wall of the U-shaped installation groove frame (6). The outer surfaces of the upper and lower ends of the threaded insertion column (9) respectively penetrate through the inner surface of a reserved insertion slot (91) preset on the inner wall of the cold-drawn steel section body (1).

4. The high-toughness, fracture-resistant cold-drawn steel according to claim 1, characterized in that: A convex-shaped embedded strip (10) is movably inserted into the inner surface of the embedded groove frame (13). The convex-shaped embedded strip (10) is integrally in the shape of a vertically placed "凸"-shaped strip structure. On the inner wall of the convex-shaped embedded strip (10), an adapted thread groove (11) is preset, and the inner wall of the adapted thread groove (11) is threadedly connected with the outer surface of the threaded insertion column (9).

5. The high-toughness, fracture-resistant cold-drawn steel according to claim 4, characterized in that: On the outer surface of the side of the embedded groove frame (13) far from the convex-shaped embedded strip (10), parallel insertion blocks two (14) are fixedly added. The parallel insertion blocks two (14) are symmetrically distributed about the horizontal center line of the embedded groove frame (13).

6. The high-toughness, fracture-resistant cold-drawn steel according to claim 1, characterized in that: The inner wall of the cold-drawn steel body (1) away from the end plug (15) is pre-set with corresponding off-end slots (16). The inner wall of the off-end slot (16) is inserted into the outer surface of the end plug (15). The off-end slots (16) are set in two sets, and the off-end slots (16) are in the shape of a recessed right-angled trapezoidal groove. The inner wall of the off-end slots (16) is provided with auxiliary welding components.

7. A high-toughness, fracture-resistant cold-drawn steel section according to claim 6, characterized in that: The outer surface of the cold-drawn steel body (1) is provided with a wear-resistant layer material, which is a high-manganese steel plate. The inner layer of the wear-resistant layer material is provided with a crack-resistant layer material, which is a tear-resistant steel plate, and the interior of the tear-resistant steel plate is provided with a tough anti-breakage component.

8. A high-toughness, fracture-resistant cold-drawn steel section according to claim 7, characterized in that: The inner side of the anti-crack layer is provided with an impact-resistant layer and a high compressive strength layer, both of which are made of high-strength compressive strength galvanized steel sheet.

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