Hot-rolled H-shaped steel structure and production method thereof

Abstract

The invention belongs to a hot-rolled H-shaped steel structure in the technical field of profile steel production, and further relates to a production method of the hot-rolled H-shaped steel structure. The upper part or the lower part of the upper flange (2) is provided with a convex part (4), the upper part or the lower part of the lower flange (3) is provided with a convex part (4), or the web (1) is provided with a convex part (4) and a concave part (5); the outer height H, the inner height h, the inner width b, the outer width B, the thin flange thickness t2, the thick flange thickness t2 ', the thin web thickness t1 and the thick web thickness t1' of the hot-rolled H-shaped steel structure are included, and the relation of the two thicknesses on the flanges is that t2 ' / t2 is larger than or equal to 1.2 and smaller than or equal to 3.0; two thickness relations on the web are as follows: 1.2 < = t1 ' / t1 < = 2.5; and the relationship between the outer height H and the outer width h is 1.0 < = H / B < = 3.0. According to the hot-rolled H-shaped steel structure, the stacked-thickness hot-rolled H-shaped steel with the transition thickness is adopted on the flange or the web, the steel using amount of the section of the hot-rolled H-shaped steel under different stress conditions is reduced, and the hot-rolled H-shaped steel structure has good adaptability to subsequent bolt connection and can be widely used and popularized.

Description

TECHNICAL FIELD

[0001] The present application belongs to the technical field of profile steel production, and more specifically relates to a hot-rolled H-shaped steel structure and a production method thereof. BACKGROUND

[0002] Hot-rolled H-shaped steel is a kind of high-performance green building material, and is increasingly widely used in the fields of construction and industry. In the field of construction, hot-rolled H-shaped steel has become the preferred support material for high-rise buildings, large venues, bridges, underground projects and other projects due to its high dimensional accuracy, efficient production, low consumption, small residual stress, high component bearing capacity, convenient connection structure, easy installation and short construction period. In addition, hot-rolled H-shaped steel is also widely used in steel structure support of industrial structures, industrial equipment structure of petroleum and chemical industry and power industry, ship, mechanical manufacturing frame structure, and beam support of train, automobile and tractor. However, hot-rolled H-shaped steel also has some disadvantages. First, its product specifications are fixed, and the cross-section flexibility is poor, which is difficult to meet the special requirements of cross-section size for some special projects. Second, the procurement cycle of non-standard specifications is long, which may affect the progress of the project. In addition, although the comprehensive cost of hot-rolled H-shaped steel is low, the steel consumption may be slightly large in some applications, resulting in an increase in cost.

[0003] A document with the patent publication number CN113399453A and the name "Hot-rolled H-shaped steel and production method thereof" provides a hot-rolled H-shaped steel production method, which includes a web, a first flange plate and a second flange plate. The difference between the thickness values of the first flange plate and the second flange plate is greater than 0, and the ratio of the area difference between the first flange plate and the second flange plate to the area of the first flange plate is not greater than 1 or the ratio of the area difference between the first flange plate and the second flange plate to the area of the second flange plate is not greater than 1. The hot-rolled H-shaped steel of the present application can meet the production requirements of different thicknesses of the two flanges on both sides of various specifications, and can also avoid side bending during rolling. The difference between the metal flow rates of the two flanges during rolling is controlled within a certain range, so as to stably produce hot-rolled H-shaped steel with different thicknesses of the two flanges. The present application mainly optimizes the standard H-shaped steel cross-section, and the focus is on the different width and thickness of the flanges of the H-shaped steel. The product of the present application is usually difficult to cut, weld and assemble due to the thicker single flange.

[0004] The patent with the publication number CN 207727842 U and the name "Building hot-rolled unequal H-shaped steel" provides a building hot-rolled unequal H-shaped steel, which comprises an upper flange, a lower flange and a web vertically located between the upper flange and the lower flange, is fixedly connected to form a steel body, and is an integral hot-rolled component. The upper flange and the lower flange have different widths, and the connection angle between the web and the upper flange and the lower flange adopts a smooth transition arc structure. The building hot-rolled unequal H-shaped steel is integrally formed by using a hot-rolling process, and the production efficiency and metal utilization rate of the steel are significantly improved. The subsequent processing and production process is simple, and the processing cycle and cost of the steel structure processing enterprise can be reduced. The original flange thickness is processed to have different thicknesses and different widths, the width difference between the upper and lower flanges is 50-100 mm, the width difference between the flanges is small in the actual assembly process, the application range is narrow, and the good adaptability of the material cannot be reflected.

[0005] However, the prior art does not relate to the technical problems and technical solutions of the present application. SUMMARY

[0006] The technical problem to be solved by the present application is that, in view of the deficiencies of the prior art, a hot-rolled H-shaped steel structure with a transition thickness in the flange or web is provided, which effectively saves the steel quantity of the hot-rolled H-shaped steel section under different stress conditions, has good adaptability with subsequent bolt connection, and can be widely used in civil buildings, bridges and industrial buildings.

[0007] To solve the above technical problems, the technical scheme adopted by the present application is as follows:

[0008] The present application is a hot-rolled H-shaped steel structure, which comprises a web 1 connected to an upper flange 2 and a lower flange 3, a convex portion 4 arranged on the upper part or lower part of the upper flange 2 or the lower flange 3, or a convex portion and a concave portion 5 arranged on the web 1; the hot-rolled H-shaped steel structure has an outer height H, an inner height h, an inner width b, an outer width B, a thin flange thickness t2, a thick flange thickness t2', a thin web thickness t1 and a thick web thickness t1'; the two thicknesses of the flange satisfy the relationship 1.2≤t2' / t2≤3.0; the two thicknesses of the web satisfy the relationship 1.2≤t1' / t1≤2.5; and the outer height H and the outer width B satisfy the relationship 1.0≤H / B≤3.0.

[0009] The hot-rolled H-shaped steel structure is a symmetrical structure, the lower part of the upper flange is provided with a convex portion, the upper part of the lower flange is provided with a convex portion, the middle part of the web is provided with a convex portion, the web close to the upper flange is provided with a concave portion, and the web close to the lower flange is provided with a concave portion.

[0010] The hot-rolled H-shaped steel structure is an upper-lower symmetric structure, a convex part is arranged on the upper part of the upper flange, a convex part is arranged on the lower part of the lower flange, a concave part is arranged on the middle part of the web, a convex part is arranged on the web close to the upper flange, and a convex part is arranged on the web close to the lower flange.

[0011] The hot-rolled H-shaped steel structure is an upper-lower asymmetric structure, the upper surface and the lower surface of the upper flange are both plane structures, a convex part is arranged on the lower part or the upper part of the lower flange, the left surface and the right surface of the web are both plane structures or a convex part is arranged on the web close to the upper flange or the lower flange; or the hot-rolled H-shaped steel structure is an upper-lower asymmetric structure, the upper surface and the lower surface of the lower flange are both plane structures, a convex part is arranged on the lower part or the upper part of the upper flange, the left surface and the right surface of the web are both plane structures or a concave part is arranged on the web close to the upper flange or the lower flange.

[0012] The hot-rolled H-shaped steel structure is an upper-lower asymmetric structure, the outer width B of the upper flange is greater than or smaller than the outer width B of the lower flange, and the inner width b of the convex part 4 of the upper flange is greater than or smaller than the inner width b of the convex part 4 of the lower flange.

[0013] The hot-rolled H-shaped steel structure is an upper-lower asymmetric structure, the outer width B of the upper flange is greater than or smaller than the outer width B of the lower flange, and the inner width b of the convex part 4 of the upper flange is greater than or smaller than the inner width b of the convex part 4 of the lower flange.

[0014] The hot-rolled H-shaped steel structure is an upper-lower asymmetric structure, the outer width B of the upper flange is greater than or smaller than the outer width B of the lower flange, and the inner width b of the convex part 4 of the upper flange is greater than or smaller than the inner width b of the convex part 4 of the lower flange.

[0015] The hot-rolled H-shaped steel structure includes an upper-lower central symmetric form or an upper-lower asymmetric form; the hot-rolled H-shaped steel structure includes an equal-width thickened flange or an equal-width thickened web form or an equal-width thinned flange or an equal-width thinned web form or an equal-width single-side thickened flange or an equal-width single-side thickened web or a non-equal-width thickened flange or a non-equal-width thickened web form.

[0016] The hot-rolled H-shaped steel structure has an outer height H in the range of 150-1200 mm and an outer width B in the range of 150-500 mm; the thickness of the upper flange and the lower flange ranges from 10 to 140 mm, the thickness of the web ranges from 8 to 100 mm, the thickness of a thin flange position without a convex part ranges from 8 to 45 mm, the thickness of a thick flange position with a convex part ranges from 10 to 140 mm, the thickness of a thin web position with a concave part ranges from 6 to 40 mm, and the thickness of a thick web position with a convex part ranges from 8 to 100 mm.

[0017] The application also relates to a production method of a hot-rolled H-shaped steel structure with a transition thickness in flanges or webs, which effectively saves the steel amount of the hot-rolled H-shaped steel structure section under different stress conditions, has good adaptability with subsequent bolt connection, and can be popularized and used in civil buildings, bridges and industrial buildings.

[0018] The technical scheme, working principle and beneficial effects of the application are as follows:

[0019] The hot-rolled H-shaped steel structure of the present application, when the structure is set, the stacked thick hot-rolled H-shaped steel includes two flanges (upper flange, lower flange) and a web combined to form an integral structure, wherein the typical cross-sectional structure is that the flange or web adopts a two-thickness transition structure, and the rear thickness part and the thin thickness part are in the form of "convex part (boss)" or "concave part (boss)", forming the unequal thickness of the flange or web, as shown in FIG. 1 and FIG. 2. Taking a typical symmetrical hot-rolled H-shaped steel as an example, the stacked thick hot-rolled H-shaped steel is located on the center symmetrical section of the hot H-shaped steel, and the height, width and thickness dimensions are respectively: outer height H, inner height h, inner width b, outer width B, thin flange thickness t2, thick flange thickness t2', thin web thickness t1, and thick web thickness t1'. In addition, the fillet at the junction of the H-shaped steel flange and web is r1, the fillet at the junction of the two thicknesses of the same flange is r2, and the fillet at the junction of the two thicknesses of the same web is r3. In addition, considering the actual requirements of the roll marking, the cross-sectional stiffness of the roll is ensured, and at the same time, the metal flow deformation law of the non-symmetrical section, the dimensions of the stacked thick hot-rolled H-shaped steel are as follows: (1) the two thicknesses on the same flange: 1.2≤t2' / t2≤3.0; (2) the two thicknesses on the same web: 1.2≤t1' / t1≤2.5; (3) the outer height and the outer width: 1.0≤H / B≤3.0. The stacked thick hot-rolled H-shaped steel of the present application can have various cross-sectional arrangement forms, such as the upper and lower center symmetrical form (FIG. 1, FIG. 2), the upper and lower asymmetrical form (FIG. 3, FIG. 4), and the equal width thickening flange or equal width thickening web form (FIG. 1), the equal width thinning flange or equal width thinning web form (FIG. 2), the equal width single-side thickening flange or equal width single-side thickening web (FIG. 3), the unequal width thickening flange or unequal width thickening web form (FIG. 4), etc. The specific design and production can be carried out according to the use scene and part requirements. The processing method of the present application forms a hot-rolled H-shaped steel with different thickness cross-sectional dimensions on the same connecting surface. This stacked thick hot-rolled H-shaped steel can flexibly adjust the thickness and width of the flange and web according to the actual engineering needs, thereby meeting the load bearing requirements under various complex conditions. The improved hot-rolled H-shaped steel structure of the present application not only retains the original excellent performance of the hot-rolled H-shaped steel, such as high strength, good plasticity and toughness, easy mechanical processing and installation, etc., but also improves the flexibility and adaptability of the cross section, reduces the material cost, and shortens the procurement cycle. It has a wide application prospect in the fields of construction and industry. For example, in high-rise buildings, the cross-sectional size of the stacked thick hot-rolled H-shaped steel can be adjusted according to the floor height and load size to achieve more economical and reasonable structural design. In large-span bridges, the stacked thick hot-rolled H-shaped steel can adapt to the load bearing requirements under different span and load conditions, improving the safety and stability of the bridge. In the structure of industrial equipment such as petroleum and chemical industry and power, the stacked thick hot-rolled H-shaped steel can be customized according to the special shape and size requirements of the equipment to ensure the normal operation and safety of the equipment. BRIEF DESCRIPTION OF DRAWINGS

[0020] The following is a brief description of the content expressed by each drawing of the present specification and the reference signs in the drawings:

[0021] Figure 1a Structure diagram of the hot-rolled H-shaped steel structure according to the present application;

[0022] Figure 1b Structure diagram of the hot-rolled H-shaped steel structure according to the present application;

[0023] Figure 2a Structure diagram of the hot-rolled H-shaped steel structure according to the present application;

[0024] Figure 2b Structure diagram of the hot-rolled H-shaped steel structure according to the present application;

[0025] Figure 3a Structure diagram of the hot-rolled H-shaped steel structure according to the present application;

[0026] Figure 3b Structure diagram of the hot-rolled H-shaped steel structure according to the present application;

[0027] Figure 4a Structure diagram of the hot-rolled H-shaped steel structure according to the present application;

[0028] Figure 4b Structure diagram of the hot-rolled H-shaped steel structure according to the present application;

[0029] Figure 5a Structure diagram of the hot-rolled H-shaped steel structure according to the present application;

[0030] Figure 5b Structure diagram of the hot-rolled H-shaped steel structure according to the present application;

[0031] Figure 6 Structure diagram of the hot-rolled H-shaped steel structure according to the present application;

[0032] Figure 7 Structure diagram of the hot-rolled H-shaped steel structure according to the present application;

[0033] Figure 8a Structure diagram of the hot-rolled H-shaped steel structure according to the present application;

[0034] Figure 8b Structure diagram of the hot-rolled H-shaped steel structure according to the present application;

[0035] Figure 8c Structure diagram of the hot-rolled H-shaped steel structure according to the present application;

[0036] Figure 8dStructure schematic view of hot-rolled H-shaped steel structure according to the present application;

[0037] Figure 9 Structure schematic view of hot-rolled H-shaped steel structure according to the present application;

[0038] Figure 10 Structure schematic view of hot-rolled H-shaped steel structure according to the present application;

[0039] Figure 11 Structure schematic view of hot-rolled H-shaped steel structure according to the present application;

[0040] Figure 12 Parameter diagram of product embodiment of hot-rolled H-shaped steel structure according to the present application;

[0041] In the drawings, reference numerals are respectively: 1, web; 2, upper flange; 3, lower flange; 4, convex part; 5, concave part. DETAILED DESCRIPTION

[0042] The shape, structure, mutual position and connecting relationship between parts, function and working principle of each component as involved in the specific embodiment of the present application will be further explained in detail by the description of the embodiments with reference to the drawings:

[0043] As shown in Figs. 1-5 of the drawings, Figure 5bAs shown, the present application is a hot-rolled H-shaped steel structure, which comprises a web 1 connecting an upper flange 2 and a lower flange 3, the upper part or lower part of the upper flange 2 is provided with a convex part 4, the upper part or lower part of the lower flange 3 is provided with a convex part 4, or the web 1 is provided with a convex part 4 and a concave part 5; the outer height H, the inner height h, the inner width b, the outer width B, the thin flange thickness t2, the thick flange thickness t2', the thin web thickness t1, the thick web thickness t1', the flange has two thickness relationships: 1.2≤t2' / t2≤3.0; the web has two thickness relationships: 1.2≤t1' / t1≤2.5; the outer height H and the outer width h have a relationship: 1.0≤H / B≤3.0. The above structure, aiming at the deficiencies in the prior art, proposes an improved technical solution. When the structure is set, the stacked thick hot-rolled H-shaped steel comprises two flanges (upper flange, lower flange) and a web combined to form an integral structure, wherein the typical cross-sectional structure is that the flange or the web adopts a two-thickness transition structure, and the rear thickness part and the thin thickness part are in the form of "convex part (boss)" or "concave part (boss)", forming unequal thickness of the flange or the web, as shown in FIG. 1 and FIG. 2. Taking a typical symmetrical hot-rolled H-shaped steel as an example, the stacked thick hot-rolled H-shaped steel is located on the center symmetrical section of the hot H-shaped steel, and the height and width and thickness dimensions are respectively: outer height H, inner height h, inner width b, outer width B, thin flange thickness t2, thick flange thickness t2', thin web thickness t1, thick web thickness t1'. In addition, the fillet at the junction of the H-shaped steel flange and the web is r1, the fillet at the junction of the two thicknesses of the same flange is r2, and the fillet at the junction of the two thicknesses of the same web is r3. In addition, considering the actual requirements of the roll marking, the cross-sectional stiffness of the roll is ensured, and at the same time, the metal flow deformation law of the non-symmetrical section, the size of the stacked thick hot-rolled H-shaped steel is required as follows: (1) the two thicknesses on the same flange: 1.2≤t2' / t2≤3.0; (2) the two thicknesses on the same web: 1.2≤t1' / t1≤2.5; (3) the outer height and the outer width: 1.0≤H / B≤3.0. The stacked thick hot-rolled H-shaped steel of the present application can have various cross-sectional arrangement forms, such as the upper and lower center symmetrical form (FIG. 1, FIG. 2), the upper and lower asymmetrical form (FIG. 3, FIG. 4), the equal-width thickened flange or equal-width thickened web form (FIG. 1), the equal-width thinned flange or equal-width thinned web form (FIG. 2), the equal-width single-side thickened flange or equal-width single-side thickened web (FIG. 3), the unequal-width thickened flange or unequal-width thickened web form (FIG. 4), etc. The specific design and production can be carried out according to the use scene and part requirements. The processing method of the present application forms a hot-rolled H-shaped steel with different thickness cross-sectional dimensions on the same connecting surface. This stacked thick hot-rolled H-shaped steel can flexibly adjust the thickness and width of the flange and the web according to the actual engineering requirements, thereby meeting the load requirements under various complex working conditions.The profile steel not only retains the original excellent performance of hot-rolled H-shaped steel, such as high strength, good plasticity and toughness, convenient mechanical processing and installation, etc., but also improves the flexibility and adaptability of the cross section, reduces the material cost, and shortens the procurement cycle. It has a wide application prospect in the fields of construction and industry. For example, in high-rise buildings, the cross-sectional size of the laminated hot-rolled H-shaped steel can be adjusted according to the floor height and load size to realize more economical and reasonable structural design. In large-span bridges, the laminated hot-rolled H-shaped steel can adapt to the bearing requirements under different span and load conditions, improving the safety and stability of the bridge. In the structure of industrial equipment such as petroleum and chemical industry and power, the laminated hot-rolled H-shaped steel can be customized according to the special shape and size requirements of the equipment to ensure the normal operation and safety of the equipment. The hot-rolled H-shaped steel structure described in the application uses laminated hot-rolled H-shaped steel with transition thickness in the flange or web, effectively saving the steel quantity of the hot-rolled H-shaped steel cross section under different stress conditions, and has good adaptability with subsequent bolt connection, which can be widely used in civil buildings, bridges and industrial buildings.

[0044] The hot-rolled H-shaped steel structure is an upper and lower symmetrical structure, the upper flange 2 is provided with a convex part 4 at the lower part, the lower flange 3 is provided with a convex part 4 at the upper part, the web 1 is provided with a convex part 4 at the middle part, the web 1 is provided with a concave part 5 near the upper flange 2, and the web 1 is provided with a concave part 5 near the lower flange 3. The above structure is shown in Figure 1 as Example 1. According to the bearing capacity requirements of different parts in actual use of the profile steel, the thickness of different parts can be changed, thereby meeting the strength requirements and saving the amount of steel.

[0045] The hot-rolled H-shaped steel structure is an upper and lower symmetrical structure, the upper flange 2 is provided with a convex part 4 at the lower part, the lower flange 3 is provided with a convex part 4 at the upper part, the web 1 is provided with a convex part 4 at the middle part, the web 1 is provided with a concave part 5 near the upper flange 2, and the web 1 is provided with a concave part 5 near the lower flange 3. The above structure is shown in Figure 1 as Example 1. According to the bearing capacity requirements of different parts in actual use of the profile steel, the thickness of different parts can be changed, thereby meeting the strength requirements and saving the amount of steel.

[0046] The hot-rolled H-shaped steel structure is an upper and lower asymmetrical structure, the upper surface and the lower surface of the upper flange 2 are both planar structures, the lower part or the upper part of the lower flange 3 is provided with a convex part 4, and the left surface and the right surface of the web 1 are both planar structures or the web is provided with a convex part 4 near the upper flange 2 or the lower flange 3; or, the hot-rolled H-shaped steel structure is an upper and lower asymmetrical structure, the upper surface and the lower surface of the lower flange 3 are both planar structures, the lower part or the upper part of the upper flange 2 is provided with a convex part 4, and the left surface and the right surface of the web 1 are both planar structures or the web 1 is provided with a concave part 5 near the upper flange 2 or the lower flange 3. The above structure is shown in Figure 3 as Example 3. According to the bearing capacity requirements of different parts in actual use of the profile steel, the thickness of different parts can be changed, thereby meeting the strength requirements and saving the amount of steel.

[0047] The hot-rolled H-shaped steel structure is an upper and lower asymmetric structure, the outer width B of the upper flange 2 is greater than or less than the outer width B of the lower flange 3, and the inner width b of the convex portion 4 of the upper flange 2 is greater than or less than the inner width b of the convex portion 4 of the lower flange 3. The above structure is shown in Figure 4 as an embodiment 4. According to the load bearing capacity requirements of different parts in actual use of the steel, the thickness of different parts can be changed, so as to meet the strength requirements and save the amount of steel.

[0048] The hot-rolled H-shaped steel structure has a round corner r1 at the connection between the upper flange 2 and the convex portion 4, a round corner r2 at the connection between the convex portion 4 of the upper flange 2 and the web 1, a round corner r3 at the connection between the convex portion 4 of the web 1 and the concave portion 5, a round corner r1 at the connection between the lower flange 3 and the convex portion 4, and a round corner r2 at the connection between the convex portion 4 of the lower flange 3 and the web 1. The thickness t1 of the concave portion 5 of the web 1 and the thickness t1' of the convex portion 4 of the web 1.

[0049] The hot-rolled H-shaped steel structure includes an upper and lower center symmetric form as shown in Figures 1 and 2, or an upper and lower asymmetric form as shown in Figures 3 and 4; the hot-rolled H-shaped steel structure includes an equal-width thickened flange or an equal-width thickened web form as shown in Figure 1, or an equal-width thinned flange or an equal-width thinned web form as shown in Figure 2, or an equal-width single-side thickened flange or an equal-width single-side thickened web as shown in Figure 3, or an unequal-width thickened flange or an unequal-width thickened web form as shown in Figure 4. The above structure has various forms, and the structure of the flange and the web can be changed according to the use scene and part requirements.

[0050] The outer height H of the hot-rolled H-beam structure ranges from 150 to 1200 mm, and the outer width B ranges from 150 to 500 mm; the thickness of the upper flange 2 and lower flange 3 ranges from 10 to 140 mm, the thickness of the web 1 ranges from 8 to 100 mm, the thickness of the thin flange without the protrusion 4 ranges from 8 to 45 mm, the thickness of the thick flange with the protrusion 4 ranges from 10 to 140 mm, the thickness of the thin web with the concave part 5 ranges from 6 to 40 mm, and the thickness of the thick web with the protrusion 4 ranges from 8 to 100 mm. The advantages of the above structure lie in providing a structure and production process for thickened hot-rolled H-beams with two transitional thicknesses in the flanges or web. This thickened hot-rolled H-beam can be configured in various ways according to actual engineering and design requirements. Its dimensions are mainly: outer height ranging from 150 to 1200 mm, and outer width ranging from 150 to 500 mm; furthermore, the thickness of the thin flange is 8 to 45 mm, the thickness of the thick flange is 10 to 140 mm, the thickness of the thin web is 6 to 40 mm, and the thickness of the thick web is 8 to 100 mm. This H-beam is integrally formed using a billet-universal rolling mill, similar to traditional hot-rolled H-beams. It has a simple structure and stable rolling process. This thickened hot-rolled H-beam can be connected with bolts, which not only reduces the amount of steel used in the section but also adapts to bolt connections, meeting the application needs of various fields such as domestic construction and bridges, and has broad market application prospects.

[0051] This invention also relates to a hot-rolled H-beam with a transitional thickness in the flange or web, which effectively saves steel consumption under different stress conditions and has good compatibility with subsequent bolt connections. This method of producing hot-rolled H-beam structures can be widely used in civil buildings, bridges, and industrial buildings. The steps of the hot-rolled H-beam structure production method are as follows: molten iron pretreatment → converter smelting or electric furnace smelting → argon blowing refining → ladle refining → vacuum refining → continuous casting of rectangular, round, or irregularly shaped billets → billet heating → billet rolling → universal rolling → air cooling or controlled cooling; wherein molten iron pretreatment, converter smelting or electric furnace smelting, argon blowing refining, ladle refining, and vacuum refining are optional steps.

[0052] The production method of the thickened hot-rolled H-beams of this invention requires the use of a twin-roll mill, a universal rolling mill unit (2 horizontal rolls and 2 vertical rolls), and a twin-roll edge mill for dimensional adjustment. This invention can use different types of billets, such as rectangular billets, round billets, and irregularly shaped billets, for billet rolling, as shown in the attached diagram. Figure 8a -Appendix Figure 8d As shown (taking an irregularly shaped billet as an example), this demonstrates the process from an irregularly shaped billet ( Figure 8a The process of forming a product after passing through a billet rolling mill (8b), a universal rolling mill (8c), and an edge rolling mill (8d).

[0053] The structure of the present application can adopt two upper and lower rolls in the breakdown section for breakdown rolling, and simultaneously set the pre-thickness on the flange and web, wherein the large reduction of the breakdown mill is mainly considered to realize the large deformation of the flange thickness, and in addition, the curvature design of the horizontal roll is matched to realize the transition design of the web thickness. After the breakdown rolling, the approximate shape size is obtained, the horizontal roll of the universal roll is adopted to perform the reduction of the web thickness, and the roll gap design of the vertical roll is matched to perform the secondary reduction of the flange thickness, the roll gap design of the horizontal roll and the vertical roll in this process can realize the multi-pass back-and-forth rolling; after the universal rolling mill, the cross section of the stacked H-shaped steel is finally finished by the edging mill, and the specific process is shown in Figures 9 to 11 The present application can adopt different types of billets, such as rectangular billets, round billets and special-shaped billets, for breakdown rolling, and the universal rolling is performed according to the actual setting, and in addition, the universal roll system can be processed by a certain roll marking to produce different types (symmetrical or non-symmetrical) of hot-rolled H-shaped steel products with the stacking thickness feature. The specific product embodiments 1-10 of the present application are shown in Figure 12

[0054] The present application has been described above in conjunction with the drawings, and it is obvious that the specific implementation of the present application is not limited by the above method. Any improvement or direct application of the concept and technical solution of the present application to other occasions is within the protection scope of the present application.​

Claims

1. A hot-rolled H-beam structure, characterized in that: The structure includes a web (1) connecting an upper flange (2) and a lower flange (3), with a protrusion (4) on the upper or lower part of the upper flange (2) and a protrusion (4) on the upper or lower part of the lower flange (3), or the web (1) having a protrusion (4) and a recess (5); the hot-rolled H-beam structure has an outer height H, an inner height h, an inner width b, an outer width B, a thin flange thickness t2, a thick flange thickness t2', a thin web thickness t1, and a thick web thickness t1'. The relationship between the two thicknesses on the flange is: 1.2≤t2' / t2≤3.0; the relationship between the two thicknesses on the web is: 1.2≤t1' / t1≤2.5; and the relationship between the outer height H and the outer width h is: 1.0≤H / B≤3.

0.

2. The hot-rolled H-beam structure according to claim 1, characterized in that: The hot-rolled H-beam structure is a symmetrical structure with a protrusion (4) at the lower part of the upper flange (2), a protrusion (4) at the upper part of the lower flange (3), a protrusion (4) in the middle of the web (1), a recess (5) near the upper flange (2) of the web (1), and a recess (5) near the lower flange (3) of the web (1).

3. The hot-rolled H-beam structure according to claim 1, characterized in that: The hot-rolled H-beam structure is a symmetrical structure with a protrusion (4) on the upper flange (2) and a protrusion (4) on the lower flange (3). A concave part (5) is provided in the middle of the web (1). A protrusion (4) is provided near the upper flange (2) and near the lower flange (3) of the web (1).

4. The hot-rolled H-beam structure according to claim 1, characterized in that: The hot-rolled H-beam structure is an asymmetrical structure, with the upper and lower surfaces of the upper flange (2) being planar, and the lower flange (3) having a protrusion (4) at the lower or upper part, and the left and right surfaces of the web (1) being planar or having a protrusion (4) near the upper flange (2) or lower flange (3); or, the hot-rolled H-beam structure is an asymmetrical structure, with the upper and lower surfaces of the lower flange (3) being planar, and the upper flange (2) having a protrusion (4) at the lower or upper part, and the left and right surfaces of the web (1) being planar or having a recess (5) near the upper flange (2) or lower flange (3).

5. The hot-rolled H-beam structure according to claim 1, characterized in that: The hot-rolled H-beam structure is an asymmetrical structure with the outer width B of the upper flange (2) being greater than or less than the outer width B of the lower flange (3), and the inner width b of the protrusion (4) of the upper flange (2) being greater than or less than the inner width b of the protrusion (4) of the lower flange (3).

6. The hot-rolled H-beam structure according to claim 1, characterized in that: The fillet at the connection between the upper flange (2) and the protrusion (4) of the hot-rolled H-beam structure is r1, the fillet at the connection between the protrusion (4) of the upper flange (2) and the web (1) is r2, and the fillet at the connection between the protrusion (4) and the concave part (5) of the web (1) is r3; the fillet at the connection between the lower flange (3) and the protrusion (4) is r1, and the fillet at the connection between the protrusion (4) of the lower flange (3) and the web (1) is r2.

7. The hot-rolled H-beam structure according to claim 6, characterized in that: The thickness t1 of the concave portion (5) of the web (1) and the thickness t1' of the convex portion (4) of the web (1).

8. The hot-rolled H-beam structure according to claim 1, characterized in that: The hot-rolled H-beam structure includes a centrally symmetrical form or an asymmetrical form; the hot-rolled H-beam structure includes a form with equal-width thickened flanges or equal-width thickened webs, or a form with equal-width thinned flanges or equal-width thinned webs, or a form with equal-width single-sided thickened flanges or equal-width single-sided thickened webs, or a form with unequal-width thickened flanges or unequal-width thickened webs.

9. The hot-rolled H-beam structure according to claim 1, characterized in that: The outer height H of the hot-rolled H-beam structure ranges from 150 to 1200 mm, and the outer width B ranges from 150 to 500 mm; the thickness of the upper flange (2) and lower flange (3) ranges from 10 to 140 mm, the thickness of the web (1) ranges from 8 to 100 mm, the thickness of the thin flange without the protrusion (4) ranges from 8 to 45 mm, the thickness of the thick flange with the protrusion (4) ranges from 10 to 140 mm, the thickness of the thin web with the concave part (5) ranges from 6 to 40 mm, and the thickness of the thick web with the protrusion (4) ranges from 8 to 100 mm.

10. The method for producing hot-rolled H-beam steel structures according to any one of claims 1 to 9, characterized in that: The production method of the hot-rolled H-beam steel structure includes the following steps: hot metal pretreatment → converter smelting or electric furnace smelting → argon blowing refining → ladle refining → vacuum refining → continuous casting of rectangular billets, round billets or irregular billets → billet heating → billet rolling → universal rolling → air cooling or controlled cooling; wherein hot metal pretreatment, converter smelting or electric furnace smelting, argon blowing refining, ladle refining and vacuum refining are optional steps.

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