High-strength pressure-bearing piece with array holes, equipment and machining method

Abstract

The high-strength pressure-bearing part with the array holes comprises a metal base body, the metal base body is provided with a plurality of through holes, the axes of the through holes are parallel to one another, the through holes are arranged in an array periodically, and the outer surface of the metal base body and the inner hole walls of the through holes are subjected to quenching process treatment. According to the scheme, the through hole structure is arranged, so that the metal matrix can be integrally and uniformly quenched during quenching process treatment, the core strength of the metal matrix is improved from a quenched and tempered state to a quenched state consistent with the surface, and a traditional solid section is converted into a sandwich-like structure with high inertia moment; and the overall yield strength is remarkably improved. The invention further provides equipment comprising the high-strength pressure-bearing piece with the array holes and a machining method of the high-strength pressure-bearing piece with the array holes.

Description

Technical Field

[0001] This invention relates to the technical field of pressure-bearing components of presses, and more specifically to a high-strength pressure-bearing component with an array of holes, and a method for processing the high-strength pressure-bearing component with an array of holes. Background Technology

[0002] The bottom mold of a large press, as a pressure-bearing component, must withstand extremely high concentrated and cyclic loads during press operation.

[0003] For large presses with capacities ranging from 10,000 to 160,000 tons, the bottom mold requires pressure-bearing components with high load-bearing capacity, high rigidity, long service life, and excellent resistance to eccentric loads. Traditionally, these pressure-bearing components are often made of solid alloy through integral forging, and quenching is performed to achieve high surface hardness. However, taking 42CrMo steel as an example, according to GB / T225-2023 "End-Quenching Test Method for Hardenability of Steel (Jominy Test)" and related heat treatment manuals, for large-section pressure-bearing components with thicknesses often exceeding 1000 mm, even with oil quenching, the effective hardening depth of 42CrMo steel (based on obtaining 50% martensite structure) is typically only 180 mm to 220 mm. This results in the core of the pressure-bearing component having significantly lower strength and hardness than the surface, and the presence of internal stress caused by hardness gradients, limiting the overall load-bearing capacity due to the weaker performance of the core.

[0004] Another common approach is to assemble large pressure-bearing components from multiple forgings by splicing or welding. However, under the high cyclic loads of a press, the joints of the pressure-bearing components are prone to stress concentration points, inducing fatigue cracks and significantly reducing service life and reliability. Furthermore, the solid structure of the pressure-bearing components results in higher material consumption, greater weight, and higher material costs.

[0005] Therefore, there is an urgent need for a new type of structure that can fundamentally solve the hardenability problem of large cross-section pressure-bearing components and effectively optimize their overall performance. Summary of the Invention

[0006] The purpose of this invention is to provide a high-strength pressure-bearing component with arrayed holes to solve the hardenability problem of large-section pressure-bearing components and effectively optimize their overall performance.

[0007] To solve the above problems, the present invention provides a high-strength pressure-bearing component with arrayed holes, comprising a metal substrate, wherein the metal substrate has a plurality of through holes, the axes of the plurality of through holes are parallel to each other and pass through the core of the metal substrate, the plurality of through holes are arranged in a periodic array, and the outer surface of the metal substrate and the inner wall of the through holes are both treated by a quenching process. The periodic arrangement of multiple through holes refers to arranging several through holes in a specific shape first, and then periodically arraying the arrangement.

[0008] Compared with existing technologies, the above solution sets multiple through holes in the metal substrate and arranges them in a periodic array. After quenching, the metal substrate can not only form martensite on the outer surface, but also form martensite on the inner wall of the through holes corresponding to the core of the metal substrate. In other words, by setting the through hole structure, the metal substrate can achieve uniform hardening throughout the entire substrate during the quenching process. This improves the core strength of the metal substrate from the tempered state to the quenched state consistent with the surface, transforming the traditional solid section into a sandwich-like structure with a high moment of inertia. This results in a significant improvement in the overall yield strength, with a test result showing an improvement of 30%-40%.

[0009] In an improved scheme, the through holes are arranged in an equilateral triangle and periodically arrayed, meaning that the center line connecting any three adjacent through holes forms an equilateral triangle. This equilateral triangular arrangement of the through holes ensures that the elastic modulus and Poisson's ratio of the material are closest in all directions, exhibiting near isotropy, thereby significantly improving the metal matrix's resistance to eccentric loading and overall stability under loads in different directions.

[0010] In an improved scheme, excluding the outermost through-holes, the center lines connecting six adjacent through-holes form a regular hexagon. This hexagonal arrangement of through-holes can evenly distribute locally concentrated loads in six directions, effectively avoiding stress concentration, improving the load-bearing uniformity of the metal matrix, and enhancing compressive strength. Furthermore, at a given porosity, the honeycomb arrangement is one of the two-dimensional periodic structures with the highest specific stiffness and specific strength, helping to maximize resistance to bending deformation while reducing the weight of the metal matrix.

[0011] In an improved scheme, the cross-section of the through hole is circular, and the diameter d of the through hole and the center distance p between two adjacent through holes satisfy the relationship: pd ≤ Dc, where Dc is the effective hardening depth of the metal substrate under the corresponding quenching process. The circular through hole not only has the largest hydraulic radius and good quenching effect, but also effectively reduces stress concentration. Furthermore, for a circular through hole, the thickness of the narrowest solid material between the holes in the metal substrate is pd. Therefore, by constraining pd ≤ Dc, the solid material between adjacent through holes in the metal substrate can be completely hardened, resulting in good consistency, greatly reducing internal stress, and achieving better load-bearing capacity of the metal substrate.

[0012] In an improved design, the orifice of the through-hole is rounded, and the ratio of the radius r of the rounded corner to the diameter d of the through-hole, r / d, ranges from 0.05 to 0.15. By rounding the orifice, eddy current dead zones are avoided during medium flow, resulting in lower flow resistance and more uniform velocity distribution of the quenching medium within the through-hole. This facilitates efficient and uniform heat dissipation, a key optimization detail for ensuring the strength of the metal matrix. It further passively mitigates stress concentration sources. When the radius r and the diameter d satisfy r / d = 0.05~0.15, the stress concentration factor can be reduced to between 1.2 and 1.8, maximizing the suppression of stress concentration without compromising structural strength. The circular design of the through-hole combined with rounded corner optimization can uniformly disperse stress under multi-directional loads, minimizing the risk of fatigue crack initiation and significantly extending service life.

[0013] In an improved scheme, the ratio d / p of the diameter d of the through hole to the center distance p between two adjacent through holes ranges from 0.3 to 0.5. Since creating through holes in the metal substrate reduces the net load-bearing area, it is also necessary to ensure that the solid material between adjacent through holes in the metal substrate has a sufficient load-bearing cross-section. Through finite element analysis and theoretical calculations, when the d / p ratio is in the range of 0.3 to 0.5, the stiffness and strength losses caused by opening holes in the metal substrate can be controlled at an optimal level while meeting the hardenability requirements.

[0014] In an improved scheme, the thickness h between any two adjacent through holes in the metal substrate is less than or equal to Dc, where Dc is the effective hardening depth of the metal substrate under the corresponding quenching process. This allows the solid material between adjacent through holes in the metal substrate to be completely hardened, resulting in good consistency, greatly reducing internal stress, and achieving better load-bearing performance of the metal substrate.

[0015] In an improved embodiment, the material of the metal matrix is ​​42CrMo, 34CrNiMo6, 40CrNiMoA, 5CrNiMo, or H13 steel.

[0016] The present invention also provides an apparatus comprising a high-strength pressure-bearing member having an array of holes as described above.

[0017] The present invention also provides a method for processing a high-strength pressure-bearing component with arrayed holes, comprising the following steps: S1: Based on the service load conditions of the equipment on the pressure-bearing components, determine the material, size and corresponding quenching process of the metal matrix, and calculate the effective hardening depth Dc of the metal matrix under the quenching process. S2: Multiple parallel through holes are made in a metal substrate. The axes of the through holes are parallel to each other and pass through the core of the metal substrate. The through holes are arranged in equilateral triangles or regular hexagons and are periodically arrayed. The cross-sectional shape of the through holes is circular. The ratio of the diameter d of the through hole to the center distance p of two adjacent through holes, d / p, is in the range of 0.3 to 0.5. At the same time, the diameter d of the through hole and the center distance p of two adjacent through holes satisfy the relationship: pd≤Dc. S3: The opening of the through hole is rounded, and the ratio of the radius r of the rounded corner to the diameter d of the through hole, r / d, is in the range of 0.05 to 0.15; S4. Perform appropriate quenching process on the metal matrix.

[0018] Compared with existing technologies, the above solution has at least the following beneficial effects: (1) Significantly improved yield strength: By setting through-hole structure, the metal matrix can not only be quenched on the outer surface during the quenching process, but also the through holes can be uniformly quenched through. This improves the core strength of the metal matrix from the tempered state (≤900MPa) to the quenched state (≥1200MPa) consistent with the surface. The solid section is transformed into a sandwich structure with a high moment of inertia, which significantly improves the overall yield strength by 30%-40%. At the same time, by adding the constraint condition of pd≤Dc to the thickness of the narrowest solid material between the holes of the metal matrix, the solid material between adjacent through holes of the metal matrix can be completely quenched through with good consistency, which greatly reduces the internal stress and achieves better load-bearing performance of the metal matrix. (2) Significantly improved compressive strength / eccentric load resistance / bending strength: By arranging the through holes into periodic regular hexagons, a honeycomb structure is formed, achieving near isotropy and significantly improving the eccentric load resistance of the metal matrix under loads in different directions; at the same time, stress concentration is effectively avoided, the load-bearing uniformity of the metal matrix is ​​improved, and the compressive strength is improved; and at a given porosity, the honeycomb arrangement is one of the two-dimensional periodic structures with the highest specific stiffness and specific strength. Under the same weight, the bending strength is significantly improved, and the bending deformation can be reduced by 30%-50%; (3) Good shear strength is maintained: By controlling the ratio of the diameter of the through hole to the center distance of the through hole within the range of 0.3 to 0.5, while ensuring that the solid material between adjacent through holes can be completely hardened, the stiffness and strength loss caused by the opening of the metal matrix is ​​controlled at the optimal level. The test results show that it can achieve more than 85% of the performance of the solid material. (4) Increased service life: By designing the cross-section of the through hole as a circle, the quenching effect is good and the stress can be effectively dispersed, reducing stress concentration; at the same time, by setting the rounded corner at the hole opening, the stress concentration source is further blunted, and when the rounded corner radius r and the hole diameter d satisfy r / d=0.05~0.15, the stress concentration coefficient can be reduced to between 1.2 and 1.8. Without affecting the structural strength, the suppression effect on stress concentration is maximized, the risk of fatigue crack initiation is effectively reduced, and the service life is greatly improved. Attached Figure Description

[0019] Figure 1 This is an overall schematic diagram of a high-strength pressure-bearing component with an array of holes (dashed lines indicate perspective). Figure 2 This is a front view schematic diagram of a high-strength pressure-bearing component with an array of holes (dashed lines are auxiliary lines representing the arrangement of through holes). Figure 3 This is a schematic diagram of a high-strength pressure-bearing component with arrayed holes, where the through holes are arranged in a regular hexagonal pattern (which is also an equilateral triangle) and subjected to pressure load (the shaded lines in the diagram represent stress, and the denser the arrangement, the greater the stress). Figure 4 This is a schematic diagram of a high-strength pressure-bearing component with arrayed holes, where the through holes are arranged in a square pattern and subjected to pressure load (the shaded lines in the diagram represent stress, and the denser the arrangement, the greater the stress). Figure 5 This is a schematic diagram showing the dimensions of a through-hole in a high-strength pressure-bearing component with an array of holes. Figure 6 This is a graph showing the ratio of fillet radius to through-hole diameter to stress concentration factor for a high-strength bearing component with arrayed holes.

[0020] Figure 7 This is a schematic diagram showing the stress concentration factor of different shaped through holes in a high-strength bearing component with arrayed holes when subjected to tensile load.

[0021] Explanation of reference numerals in the attached figures. 1. Metal substrate; 2. Through hole; 3. Rounded corner. Detailed Implementation

[0022] It should be understood by those skilled in the art that the following embodiments are merely illustrative of the technical principles of the embodiments of this application and are not intended to limit the scope of protection of the embodiments of this application. Those skilled in the art can make adjustments as needed to adapt to specific application scenarios.

[0023] In the following description of the embodiments, it should be noted that, unless otherwise explicitly specified and limited, the terms "connected" and "linked" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in the embodiments of this application based on the specific circumstances.

[0024] In the embodiments of this application, unless otherwise expressly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0025] The present application will now be described in further detail with reference to the accompanying drawings and specific embodiments.

[0026] Example 1 Please see Figures 1-7 Embodiment 1 of the present invention provides a high-strength pressure-bearing component with an array of holes, comprising a metal substrate 1, wherein the metal substrate 1 has a plurality of through holes 2, and the axes of the plurality of through holes 2 are parallel to each other (all along...). Figure 1 (in the X-axis direction) and passing through the core of the metal substrate 1, multiple through holes 2 are arranged in a periodic array, and the outer surface of the metal substrate 1 and the inner wall of the through holes 2 are both treated by quenching process. The periodic arrangement of multiple through holes 2 means that several through holes 2 are first arranged in a specific shape, and then the arrangement is periodically arrayed.

[0027] The above-mentioned scheme sets multiple through holes 2 on the metal substrate 1 and arranges the multiple through holes 2 in a periodic array. After the quenching process, the metal substrate 1 can not only form a martensitic structure on the outer surface, but also form a martensitic structure on the inner wall of the through holes 2 corresponding to the core of the metal substrate 1. That is, by setting the through hole 2 structure, the metal substrate 1 can achieve uniform quenching throughout during the quenching process, so that the core strength of the metal substrate 1 is improved from the tempered state to the quenched state consistent with the surface. The traditional solid section is transformed into a sandwich-like structure with a high moment of inertia, and the overall yield strength is significantly improved. The improvement rate can reach 30%-40% according to the test.

[0028] It should be understood that the core of the metal substrate 1 referred to in this invention refers to the interior, that is, the area that cannot be effectively hardened through during the quenching process. The specific shape of the arrangement of the through holes 2 can be set as needed, for example, two through holes 2 arranged in a straight line, three through holes 2 arranged in a triangle, four through holes 2 arranged in a square (e.g.,...). Figure 4 As shown), six through holes 2 are arranged in a hexagonal shape, etc. In this embodiment, as... Figure 1 and Figure 2 As shown, the through holes 2 are arranged in an equilateral triangle and periodically arrayed, meaning that the line connecting the centers of any three adjacent through holes 2 forms an equilateral triangle. The equilateral triangular arrangement of the through holes 2 makes the elastic modulus and Poisson's ratio of the material most similar in all directions, exhibiting approximate isotropy, thereby significantly improving the resistance to eccentric loading and the overall stability of the metal matrix 1 under loads in different directions.

[0029] Furthermore, excluding the outermost through-hole 2, the center lines connecting any six adjacent through-holes 2 form a regular hexagon. The hexagonal arrangement of through-holes 2 can evenly diffuse and transfer locally concentrated loads in six directions, effectively avoiding stress concentration, improving the load-bearing uniformity of the metal matrix 1, and enhancing compressive strength. Simultaneously, at a given porosity, the honeycomb arrangement is one of the two-dimensional periodic structures with the highest specific stiffness and specific strength, helping to maximize resistance to bending deformation while reducing the weight of the metal matrix 1.

[0030] The cross-sectional shape of the through hole 2 can be designed as needed, such as a circle, an ellipse, or a rounded polygon, all of which fall within the scope of this design. In this embodiment, the cross-section of the through hole 2 is circular. A circular through hole 2 not only has the largest hydraulic radius and good quenching effect, but also effectively reduces stress concentration.

[0031] Furthermore, the orifice of the through hole 2 is provided with a fillet 3, and the ratio r / d of the radius r of the fillet 3 to the diameter d of the through hole 2 ranges from 0.05 to 0.15. By providing a fillet 3 at the orifice of the through hole 2, eddy current dead zones can be avoided during medium flow, resulting in lower flow resistance and more uniform flow velocity distribution of the quenching medium within the through hole 2. This facilitates efficient and uniform heat dissipation, which is a key optimization detail to ensure the strength of the metal matrix 1. It can further passivate stress concentration sources, and when the radius r of the fillet 3 and the hole diameter d satisfy r / d = 0.05~0.15, the stress concentration factor can be reduced to between 1.2 and 1.8 (e.g., Figure 6 As shown in the figure, the design maximizes the suppression of stress concentration without affecting the structural strength. The circular design of the through hole 2, combined with the optimization of the fillet 3, can uniformly distribute stress under multi-directional loads, minimize the risk of fatigue crack initiation, and significantly improve service life.

[0032] It is worth noting that even if a circular through-hole 2 structure is adopted, if the opening is not designed with rounded corners 3, the edge of the through-hole 2 will still form a sharp corner stress concentration source. Under cyclic loads of tens of thousands of tons, the stress concentration factor in this area may rise to more than 3.0, becoming a key factor in the initiation of fatigue cracks. Traditional structural designs often overlook this detail, resulting in the structural mechanical performance failing to meet the standards.

[0033] As a preferred embodiment, the thickness h between any two adjacent through holes 2 in the metal substrate 1 is ≤ Dc, where Dc is the effective hardening depth of the metal substrate 1 under the corresponding quenching process. This ensures that the solid material between adjacent through holes in the metal substrate 1 can be completely hardened, resulting in good consistency, significantly reducing internal stress, and achieving better load-bearing performance of the metal substrate 1. In this embodiment, for circular through holes 2, the thickness h = pd of the narrowest solid material between the holes in the metal substrate 1, thus satisfying the relationship: pd ≤ Dc. The "effective hardening depth Dc" mentioned herein refers to the maximum allowable thickness under the selected quenching process, based on obtaining 50% martensite structure. Its value can be determined according to GB / T225 standard and through actual process experiments.

[0034] In this embodiment, the ratio d / p of the diameter d of the through hole 2 to the center distance p between two adjacent through holes 2 ranges from 0.3 to 0.5. Since opening through holes 2 in the metal substrate 1 reduces the net load-bearing area, it is also necessary to ensure that the solid material between adjacent through holes in the metal substrate 1 has a sufficient load-bearing cross section. Through finite element analysis and theoretical calculations, when the d / p ratio is in the range of 0.3 to 0.5, the stiffness and strength loss caused by opening holes in the metal substrate 1 can be controlled at an optimal level while meeting the hardenability requirements.

[0035] In this embodiment, the material of the metal matrix 1 is 42CrMo, 34CrNiMo6, 40CrNiMoA, 5CrNiMo or H13 steel.

[0036] It should be understood that any simple variation or equivalent substitution of the shape of the through hole 2 (circular, elliptical, polygonal), whether the opening is provided with a rounded corner 3, and the array method of multiple through holes 2 (including but not limited to d / p ratio, r / d ratio), as long as it is still based on the core inventive concept of "achieving overall hardening optimization of the metal substrate 1 through periodically arranged array of through holes 2", and can achieve the same technical effect as the present invention, all fall within the protection scope of the present invention.

[0037] Example 2 Embodiment 2 of the present invention provides a method for processing a high-strength pressure-bearing component with arrayed holes, comprising the following steps: S1: Based on the service load conditions of the equipment on the pressure-bearing components, determine the material, size and corresponding quenching process of the metal matrix 1, and calculate the effective hardening depth Dc of the metal matrix 1 under the quenching process. S2: Multiple parallel through holes 2 are made on the metal substrate 1. The axes of the through holes 2 are parallel to each other and pass through the core of the metal substrate 1. The through holes 2 are arranged in equilateral triangles or regular hexagons and are periodically arrayed. The cross-sectional shape of the through holes 2 is circular. The ratio of the diameter d of the through hole 2 to the center distance p of two adjacent through holes 2, d / p, is in the range of 0.3 to 0.5. At the same time, the diameter d of the through hole 2 and the center distance p of two adjacent through holes 2 satisfy the relationship: pd≤Dc. S3: The opening of the through hole 2 is rounded with a fillet 3, and the ratio of the radius r of the fillet 3 to the diameter d of the through hole 2, r / d, is in the range of 0.05 to 0.15; S4. Perform appropriate quenching process on the metal substrate 1.

[0038] Compared with existing technologies, the above solution has at least the following beneficial effects: (1) Significantly improved yield strength: By setting the through hole 2 structure, the metal substrate 1 can not only achieve quenching of the outer surface during the quenching process, but also achieve uniform quenching of the entire through hole 2. This improves the core strength of the metal substrate 1 from the tempered state (≤900MPa) to the quenched state consistent with the surface (≥1200MPa). The solid section is transformed into a sandwich structure with a high moment of inertia, which significantly improves the overall yield strength by 30%-40%. At the same time, by increasing the constraint condition of the thickness of the narrowest solid material between the holes of the metal substrate 1: pd≤Dc, the solid material between adjacent through holes of the metal substrate 1 can be completely quenched with good consistency, which greatly reduces the internal stress and achieves better load-bearing performance of the metal substrate 1. (2) Significantly improved compressive strength / eccentric load resistance / bending strength: By arranging the through holes 2 into periodic regular hexagons, a honeycomb structure is formed, achieving near isotropy and significantly improving the eccentric load resistance of the metal substrate 1 under loads in different directions; at the same time, stress concentration is effectively avoided, the load uniformity of the metal substrate 1 is improved, and the compressive strength is improved; and at a given porosity, the honeycomb arrangement is one of the two-dimensional periodic structures with the highest specific stiffness and specific strength. Under the same weight, the bending strength is significantly improved, and the bending deformation can be reduced by 30%-50%; (3) Good shear strength is maintained: By controlling the ratio of the diameter of the through hole 2 to the center distance of the through hole 2 within the range of 0.3 to 0.5, while ensuring that the solid material between adjacent through holes can be completely quenched, the stiffness and strength loss caused by the opening of the metal matrix 1 is controlled at the optimal level. The test results show that the performance can reach more than 85% of the solid material. (4) Increased service life: By designing the cross-section of the through-hole 2 as a circle, the quenching effect is good, and it can effectively disperse stress and reduce stress concentration. At the same time, by setting a fillet 3 at the hole opening, the stress concentration source is further passivated. And when the radius r of the fillet 3 and the hole diameter d satisfy r / d = 0.05 - 0.15, the stress concentration coefficient can be reduced to between 1.2 and 1.8. Without affecting the structural strength, the inhibitory effect on stress concentration is maximized, effectively reducing the risk of fatigue crack initiation and significantly increasing the service life.

[0039] Example 3 Example 3 of the present invention provides a device and a processing method for a high-strength pressure-bearing member with array holes of the device. Taking the bottom die of a press with a nominal pressure of 20,000 tons as an example, of course, the device can also be a large forging die, a hydraulic press workbench or a heavy equipment foundation platform.

[0040] The processing method for the high-strength pressure-bearing member with array holes of the device includes the steps: S1: Select 42CrMo steel as the material of the metal matrix 1, and rough-machine the 42CrMo steel forging blank to be close to the target size, for example, length × width × thickness ≈ 3000mm × 2000mm × 800mm; Query the hardenability data of 42CrMo quenched in strong circulating oil, and its effective hardening depth Dc is usually 180mm to 220mm. In this example, Dc = 200mm (within the typical range) is taken. S2: (1) Structure parameter selection: Determine that the hole shape of the through-hole 2 on the metal matrix 1 is a round hole, the arrangement mode of the through-holes 2 is an equilateral triangle, select the diameter d of the through-hole 2 = 100mm, and the center distance p between adjacent through-holes 2 = 240mm, then d / p = 0.417, which falls within the optimal range of 0.3 - 0.5; and p - d = 140mm < Dc = 200mm, meeting the hardenability requirements. (2) Process according to the structure parameters: Use a deep hole drilling machine and a cemented carbide drill bit to drill all the through-holes 2 according to the diameter d of the through-hole 2 = 100mm, the center distance p between adjacent through-holes 2 = 240mm, and the equilateral triangle arrangement mode; After processing, ensure that the hole center distance error ≤ ±5mm and the hole axis perpendicularity ≤ 0.02mm / m. S3: Use a cemented carbide chamfering tool to chamfer both ends of all the through-holes 2. The range of the ratio r / d of the radius r of the fillet 3 to the diameter d of the through-hole 2 is 0.05 to 0.1, and in this example, r / d = 0.1 is selected, that is, r = 10mm (falling within the optimal range of 0.05 - 0.15); In the preferred solution, after all hole processing and fillet 3 treatment are completed, stress relief annealing is carried out. S4. Perform the corresponding quenching process: heat the metal matrix 1 as a whole to 850±10℃ for austenitization, and then quickly transfer it to a strong stirring quenching oil tank for cooling; the quenching oil can flow freely through all through holes 2, which aims to ensure that the material area of ​​the entire cross section obtains a high-strength structure dominated by martensite; temper at an appropriate temperature to obtain a tempered sorbite structure and optimize strength and toughness.

[0041] Verification shows that after the above structural optimization and heat treatment, the metal matrix 1 can achieve overall high performance (the surface yield strength of 42CrMo steel in the quenched and tempered state of the traditional solid structure is ≥835MPa, but the core yield strength may only be about 500-600MPa, and the overall yield strength will be lower than 835MPa, while the overall yield strength of this solution is ≥1200MPa, which is a significant improvement), and the weight is reduced by about 18%, while the bending stiffness is expected to increase by more than 25%; the orifice fillet 3 design reduces the stress concentration factor to below 1.5, and the resistance to eccentric load and fatigue life are significantly enhanced compared with the structure without fillet 3.

[0042] It should be noted that in the description of this application, the terms "inner" and "outer," etc., indicating directions or positional relationships, are based on the directions or positional relationships shown in the accompanying drawings. This is only for the convenience of description and does not indicate or imply that the device or component must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, it should not be construed as a limitation of this application. All directional indications (such as up, down, left, right, front, back, inner, and outer) are only used to explain the relative positional relationships and movement between components in a specific posture. If the specific posture changes, the directional indication will also change accordingly.

[0043] In the description of this application, the references to terms such as "an embodiment," "some embodiments," "in this embodiment," "specific example," or "some examples," etc., refer to specific features, structures, materials, or characteristics described in connection with that embodiment or example, which are included in at least one embodiment or example of this application. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in a suitable manner in any one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0044] The above description is merely a specific embodiment of this application, but the scope of protection of this application is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in this application should be included within the scope of protection of this application. Therefore, the scope of protection of this application should be determined by the scope of the claims.

Claims

1. A high-strength pressure-bearing component with an array of holes, comprising a metal substrate (1), characterized in that, The metal substrate (1) has multiple through holes (2), the axes of the multiple through holes (2) are parallel to each other and pass through the core of the metal substrate (1), the multiple through holes (2) are arranged in a periodic array, and the outer surface of the metal substrate (1) and the inner wall of the through holes (2) are both treated by quenching process. The periodic arrangement of multiple through holes (2) means that several through holes (2) are first arranged in a specific shape, and then the arrangement is periodically arrayed.

2. The high-strength pressure-bearing component with arrayed holes according to claim 1, characterized in that, The through holes (2) are arranged in an equilateral triangle and periodically arrayed, that is, the center line connecting any three adjacent through holes (2) forms an equilateral triangle.

3. The high-strength pressure-bearing component with arrayed holes according to claim 2, characterized in that, Excluding the outermost through hole (2), the center lines of the six adjacent through holes (2) of any other through hole (2) form a regular hexagon.

4. The high-strength pressure-bearing component with arrayed holes according to any one of claims 1-3, characterized in that, The cross-section of the through hole (2) is circular. The diameter d of the through hole (2) and the center distance p of two adjacent through holes (2) satisfy the relationship: pd≤Dc, where Dc is the effective hardening depth of the metal substrate (1) under the corresponding quenching process.

5. The high-strength pressure-bearing component with arrayed holes according to claim 4, characterized in that, The opening of the through hole (2) is provided with a rounded corner (3), and the ratio of the radius r of the rounded corner (3) to the diameter d of the through hole (2) is in the range of 0.05 to 0.

15.

6. The high-strength pressure-bearing component with arrayed holes according to claim 4, characterized in that, The ratio d / p of the diameter d of the through hole (2) to the center distance p of two adjacent through holes (2) ranges from 0.3 to 0.

5.

7. The high-strength pressure-bearing component with arrayed holes according to any one of claims 1-3, characterized in that, The thickness h between any two adjacent through holes (2) of the metal substrate (1) is less than or equal to Dc, where Dc is the effective hardening depth of the metal substrate (1) under the corresponding quenching process.

8. The high-strength pressure-bearing component with arrayed holes according to claim 1, characterized in that, The material of the metal matrix (1) is 42CrMo, 34CrNiMo6, 40CrNiMoA, 5CrNiMo or H13 steel.

9. A device, characterized in that, Including the high-strength pressure-bearing component with arrayed holes as described in any one of claims 1-8.

10. A method for processing a high-strength pressure-bearing component with arrayed holes, characterized in that, Includes the following steps: S1: Based on the service load conditions of the equipment on the pressure-bearing parts, determine the material, size and corresponding quenching process of the metal matrix (1), and obtain the effective hardening depth Dc of the metal matrix (1) under the corresponding quenching process; S2: Multiple parallel through holes (2) are opened on the metal substrate (1). The axes of the through holes (2) are parallel to each other and pass through the core of the metal substrate (1). The through holes (2) are arranged in equilateral triangles or regular hexagons and are periodically arrayed. The cross-sectional shape of the through holes (2) is circular. The ratio of the diameter d of the through hole (2) to the center distance p of two adjacent through holes (2) is d / p, which is in the range of 0.3 to 0.

5. At the same time, the diameter d of the through hole (2) and the center distance p of two adjacent through holes (2) satisfy the relationship: pd≤Dc; S3: The opening of the through hole (2) is rounded (3), and the ratio of the radius r of the rounded corner (3) to the diameter d of the through hole (2) is in the range of 0.05 to 0.15; S4. Perform the corresponding quenching process on the metal matrix (1).

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