A high hardness stainless steel structure

Abstract

The utility model belongs to stainless steel structure technical field, and disclose a kind of high hardness stainless steel structure, including base layer, transition layer and surface layer, transition layer is laid on base layer upper end face, surface layer is laid on transition layer upper end face;The protrusion of several integrated on base layer upper end face, the stamping tongue piece of several only single side and body connection, three side separation integrated on transition layer upper, tongue piece is formed when the stamping tongue hole of synchronous formation and the adaptation of protrusion, protrusion vertically passes through stamping tongue hole;The groove is set up in surface layer lower end face, and the top of protrusion and stamping tongue piece respectively extends into groove;Base layer, transition layer and surface layer are fixed as an organic whole by hot rolling process.The utility model reaches the advantage of improving interlayer connection stability, prolonging the service life of structure by the double reinforcement of structure engagement and metallurgy combination.

Description

Technical Field

[0001] This utility model belongs to the field of stainless steel structure technology, specifically a high-hardness stainless steel structure. Background Technology

[0002] In industrial production and construction engineering, high-hardness stainless steel structures are widely used in critical applications such as mechanical transmission components, load-bearing components, and wear-resistant liners due to their combined wear resistance, impact resistance, and corrosion resistance. To meet the requirements of material hardness and service life in practical applications, existing technologies often employ high-hardness stainless steel materials or multi-layer composite structures. These structures attempt to balance the hardness, toughness, and interlayer stability of the structure through single-material reinforcement or simple layering. Among these, multi-layer composite structures, which combine the performance advantages of different materials, have gradually become the mainstream design direction for high-hardness stainless steel structures. Their core idea is to provide high hardness and wear resistance through the surface layer, while the base layer provides supporting strength and toughness to adapt to the needs of complex working conditions.

[0003] In existing high-hardness stainless steel composite structures, interlayer connections are mostly achieved through direct lamination followed by hot rolling and welding to achieve planar bonding and fixation. No dedicated positioning or interlocking structures are designed, and the interlayer bonding strength mainly relies on metallurgical bonding. However, in actual use, due to the lack of a mechanical locking mechanism between the layers and the differences in thermal expansion coefficients and mechanical properties of different materials, relative displacement easily occurs between the layers under vibration, impact, or long-term loads, leading to loosening of the connection. Simultaneously, the planar bonding method prevents effective stress dispersion between layers, easily causing stress concentration at the interlayer interface. Over long-term use, this gradually weakens the interlayer bonding strength, ultimately leading to failures such as delamination and detachment, severely affecting the overall stability and service life of the structure.

[0004] Therefore, there is an urgent need for a high-hardness stainless steel structure that can solve the above problems in order to improve its connection reliability and long-term performance under complex working conditions. Utility Model Content

[0005] To address the problems mentioned in the background section, this invention provides a high-hardness stainless steel structure.

[0006] To achieve the above objectives, this utility model provides the following technical solution: a high-hardness stainless steel structure, comprising a base layer, a transition layer, and a surface layer. The transition layer is laid on the upper surface of the base layer, and the surface layer is laid on the upper surface of the transition layer. The upper surface of the base layer is integrally formed with several protrusions. The transition layer is integrally formed with several stamped tongues. Each stamped tongue is continuously connected to the transition layer body on only one side, while the other three sides are separated from the transition layer body. During the forming process, stamped tongue holes are simultaneously formed between the separated three sides and the transition layer body. The stamped tongue holes correspond one-to-one with the protrusions, and the protrusions pass through the stamped tongue holes in a vertical direction. The lower surface of the surface layer is provided with several grooves, and the tops of the protrusions and the tops of the stamped tongues extend into the grooves. The base layer, transition layer, and surface layer are fixedly connected as a whole by a hot rolling process.

[0007] Preferably, the protrusions of the base layer, the stamped tongues of the transition layer, and the grooves of the surface layer are all distributed in a rectangular array, and the array spacing of the three is equal; this arrangement can ensure that the protrusions of the base layer, the stamped tongues of the transition layer and the grooves of the surface layer are precisely aligned, so that the force between the layers is evenly distributed.

[0008] Preferably, the protrusion is rectangular and has rounded corners at its top edge; this feature increases the contact area between the protrusion and the groove on the surface.

[0009] Preferably, the groove is an open structure that is wider at the top and narrower at the bottom, with one side of the inner wall of the groove inclined and the other side of the inner wall perpendicular to the lower end face of the surface layer; this arrangement facilitates the smooth insertion of the protrusion and the stamped tongue of the transition layer, while improving the meshing stability of the three.

[0010] Preferably, the stamped tongue is bent at a 90-degree angle to the transition layer, and its top bent edge is rounded; this setting can ensure that the stamped tongue accurately extends into the groove of the surface layer, and the rounded corner structure can reduce stress concentration.

[0011] Compared with the prior art, the beneficial effects of this utility model are as follows: This invention employs a three-layer superimposed structure consisting of a base layer, a transition layer, and a surface layer. First, several protrusions are integrally formed on the upper surface of the base layer, providing a positioning and support foundation for interlayer connections. Then, several stamped tongues are integrally formed on the transition layer. These stamped tongues connect to the transition layer body on only one side, while the other three sides are separate. During forming, stamped tongue holes are simultaneously created, allowing the base layer protrusions to pass through the stamped tongue holes vertically, achieving initial engagement between the base layer and the transition layer. Finally, a groove on the lower surface of the surface layer accommodates the tops of the protrusions and stamped tongues. Combined with hot rolling, the three-layer structure is fixed as a single unit, achieving a dual connection mechanism of interlayer mechanical engagement and metallurgical bonding. This overcomes the shortcomings of traditional structures where interlayers only have planar contact and lack mechanical locking, preventing relative displacement between layers, alleviating interlayer stress concentration, preventing interlayer delamination, and improving the overall connection stability and service life of high-hardness stainless steel structures. Attached Figure Description

[0012] Figure 1 This is a schematic diagram of the overall structure of this utility model; Figure 2 This is a frontal, disassembled sectional view of the present invention. Figure 3 This is a schematic diagram of the base structure of this utility model; Figure 4 This is a schematic diagram of the transition layer structure of this utility model; Figure 5 This is a schematic diagram of the surface structure of this utility model.

[0013] In the diagram: 1. Base layer; 11. Protrusion; 2. Transition layer; 21. Stamped tongue; 22. Stamped tongue hole; 3. Surface layer; 31. Groove. Detailed Implementation

[0014] 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.

[0015] like Figures 1 to 5 As shown, this utility model provides a high-hardness stainless steel structure, including a base layer 1, a transition layer 2, and a surface layer 3; The base layer 1 is a plate-shaped support structure made of austenitic stainless steel. Several protrusions 11 are integrally formed on its upper surface and distributed in a rectangular array. The protrusions 11 are rectangular strips with rounded corners at the top edge. The height of the protrusions 11 is greater than the thickness of the transition layer 2. They can pass through the transition layer 2 in a vertical direction, and the height of the top of the protrusions 11 extending out of the upper surface of the transition layer 2 is the same as the height of the top of the stamped tongue 21.

[0016] The above scheme is adopted as follows: the base layer 1 is made of austenitic stainless steel, which utilizes its excellent toughness and corrosion resistance to ensure the overall load-bearing stability of the structure and avoid rust failure during long-term use; the protrusion 11 is designed as a rectangular strip and integrally formed, which increases the contact area with the groove 31 of the surface layer 3 and avoids weak connection points in subsequent assembly; the rounded corner design at the top can reduce stress concentration; the rectangular array distribution provides uniform force support for interlayer meshing, solving the problem that the traditional base layer relies solely on planar bonding, resulting in insufficient bonding force and easy local loosening.

[0017] The transition layer 2 is a plate-shaped buffer structure made of duplex stainless steel, laid on the upper surface of the base layer 1. Several stamped tongues 21 corresponding to the protrusions 11 on the base layer 1 are processed on the transition layer 2 by stamping. The stamped tongues 21 are only continuously connected to the body of the transition layer 2 on one side, and separated from the body of the transition layer 2 on the other three sides. The stamped tongues 21 are bent at a 90-degree angle to the transition layer 2, and the top bend edge is rounded. The top height is the same as the height of the top of the protrusion 11 extending out of the transition layer 2. During the forming process of the stamped tongues 21, matching stamped tongue holes 22 are generated on the transition layer 2. The stamped tongue holes 22 are rectangular strips that match the shape of the protrusions 11, allowing the protrusions 11 of the base layer 1 to pass through smoothly.

[0018] The above solution is adopted: the transition layer 2 is made of duplex stainless steel, which balances medium hardness and toughness, effectively connecting the high hardness of the surface layer 3 and the high toughness of the base layer 1, and alleviating the uneven stress transmission caused by the difference in performance between the layers; the stamped tongue 21 has a slight elasticity with a single-sided connection and a 90-degree bend, which can offset the dimensional error when the three layers are stacked, and ensure the precise alignment of the protrusion 11 and the groove 31; the top rounded corner design further reduces stress concentration and avoids cracking at the bend; the precise fit between the stamped tongue hole 22 and the protrusion 11 not only achieves interlayer positioning, but also avoids interference wear caused by relative displacement, solving the problem that the traditional transition layer only serves as a material buffer and has no mechanical meshing effect, and cannot enhance the stability of the interlayer connection.

[0019] The surface layer 3 is a plate-shaped high-hardness structure made of martensitic stainless steel, laid on the upper end surface of the transition layer 2. Its lower end surface is machined with several grooves 31 distributed in a rectangular array. The grooves 31 are open structures that are wider at the top and narrower at the bottom. One inner wall is inclined, and the other inner wall is perpendicular to the lower end surface of the surface layer 3. The depth of the grooves 31 is half the thickness of the surface layer 3, which is adapted to the height of the top of the protrusion 11 extending out of the transition layer 2 and the height of the top of the stamped tongue 21. The position of the grooves 31 corresponds one-to-one with the protrusion 11 of the base layer 1 and the stamped tongue 21 of the transition layer 2. The width of the grooves 31 is adapted to the overall width of the protrusion 11 and the stamped tongue 21, so that both can be inserted into it.

[0020] The above scheme is adopted as follows: the surface layer 3 is made of martensitic stainless steel to ensure the high hardness and wear resistance of the structure, which is suitable for mechanical transmission, wear-resistant lining and other scenarios; the groove 31 is set to half the thickness of the surface layer 3, which ensures the depth required for meshing and avoids weakening the structural strength of the surface layer 3 itself; the top-wide and bottom-narrow structure with one side inclined and the other side vertical facilitates the smooth insertion of the protrusion 11 and the stamped tongue 21 when they are pre-stacked; the groove width is designed to match the overall width of the two, and with the hot rolling process, the protrusion 11 and the stamped tongue 21 can undergo slight plastic deformation under high temperature and high pressure, thereby completely filling the groove 31, realizing the tight fit between the two and the surface layer 3, and preventing the layers from peeling off in the horizontal direction; the rectangular array arrangement is consistent with the array spacing of the base layer 1 and the transition layer 2, so that the surface layer 3 is evenly distributed with force, which solves the problems of traditional surface layers relying only on material hardness, being prone to wear and cracking due to local stress concentration, and lacking mechanical locking between layers, resulting in weak bonding.

[0021] Working principle and usage process of this utility model: Prepare base layer 1, transition layer 2, and surface layer 3, ensuring that the protrusion 11 of base layer 1, the stamping tongue 21 of transition layer 2, the stamping tongue hole 22, and the groove 31 of surface layer 3 are precisely aligned, and that the height of the top of protrusion 11 extending out of transition layer 2 and the height of the top of stamping tongue 21 are matched with the depth of groove 31. The transition layer 2 is laid on the upper surface of the base layer 1, so that the protrusion 11 of the base layer 1 passes through the punching tongue hole 22 of the transition layer 2 in a vertical direction, ensuring that the top of the protrusion 11 is flush with the top of the punching tongue 21. The surface layer 3 is laid on the upper surface of the transition layer 2, so that the top of the protrusion 11 and the top of the stamped tongue 21 of the transition layer 2 are simultaneously inserted into the groove 31 of the surface layer 3. The positioning effect of the rectangular array ensures that the three-layer structure is not offset, thus completing the pre-stacking. The pre-stacked structure is fed into a hot rolling mill, heated to the austenitizing temperature range and held at that temperature, while rolling pressure is applied. The protrusion 11 and the stamped tongue 21 undergo slight plastic deformation under high temperature and high pressure, completely filling the groove 31 of the surface layer 3, achieving a tight fit with the surface layer 3; at the same time, the contact surface of the three-layer structure achieves metallurgical bonding through atomic diffusion, ultimately forming a stable integrated high-hardness stainless steel structure with the base layer 1, the transition layer 2 and the surface layer 3.

[0022] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0023] Although embodiments of the present 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 present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A high-hardness stainless steel structure, comprising a base layer (1), a transition layer (2), and a surface layer (3), wherein the transition layer (2) is laid on the upper surface of the base layer (1), and the surface layer (3) is laid on the upper surface of the transition layer (2), characterized in that: The upper surface of the base layer (1) is integrally formed with several protrusions (11). Several stamped tongues (21) are integrally formed on the transition layer (2). The stamped tongues (21) are only continuously connected to the body of the transition layer (2) on one side, while the other three sides are separated from the body of the transition layer (2). During the forming process, the three separated sides and the body of the transition layer (2) simultaneously form stamped tongue holes (22). The stamping tongue hole (22) and the protrusion (11) are matched one-to-one, and the protrusion (11) passes through the stamping tongue hole (22) in the vertical direction. The lower end face of the surface layer (3) is provided with several grooves (31), and the top of the protrusion (11) and the top of the stamped tongue (21) both extend into the grooves (31); The base layer (1), transition layer (2) and surface layer (3) are fixedly connected as one unit by hot rolling process.

2. The high-hardness stainless steel structure according to claim 1, characterized in that: The protrusions (11) of the base layer (1), the stamped tongues (21) of the transition layer (2) and the grooves (31) of the surface layer (3) are all distributed in a rectangular array, and the array spacing of the three is equal.

3. The high-hardness stainless steel structure according to claim 1, characterized in that: The protrusion (11) is a rectangular strip with rounded corners at its top edge.

4. The high-hardness stainless steel structure according to claim 1, characterized in that: The groove (31) is an open structure that is wider at the top and narrower at the bottom. The inner wall of one side of the groove (31) is inclined, and the inner wall of the other side is perpendicular to the lower end face of the surface layer (3).

5. The high-hardness stainless steel structure according to claim 1, characterized in that: The stamped tongue (21) is bent at a 90-degree angle to the transition layer (2), and its top bent edge is rounded.

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