CN115505705A - Rolling method of H-shaped steel pile for high-strength building structure - Google Patents
Rolling method of H-shaped steel pile for high-strength building structure Download PDFInfo
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- CN115505705A CN115505705A CN202211176466.8A CN202211176466A CN115505705A CN 115505705 A CN115505705 A CN 115505705A CN 202211176466 A CN202211176466 A CN 202211176466A CN 115505705 A CN115505705 A CN 115505705A
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- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D8/00—Modifying the physical properties by deformation combined with, or followed by, heat treatment
- C21D8/005—Modifying the physical properties by deformation combined with, or followed by, heat treatment of ferrous alloys
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B1/00—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations
- B21B1/08—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations for rolling structural sections, i.e. work of special cross-section, e.g. angle steel
- B21B1/088—H- or I-sections
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/04—Ferrous alloys, e.g. steel alloys containing manganese
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/12—Ferrous alloys, e.g. steel alloys containing tungsten, tantalum, molybdenum, vanadium, or niobium
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
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- Crystallography & Structural Chemistry (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Heat Treatment Of Steel (AREA)
Abstract
The invention discloses a rolling method of a high-strength H-shaped steel pile for a building structure, which can be used for rolling to obtain a higher-strength (yield strength is more than or equal to 560MPa, and tensile strength is more than or equal to 670 MPa) H-shaped steel pile for the building structure by controlling the rough rolling temperature to be 1170-1200 ℃, the finish rolling start temperature to be 920-940 ℃ and the finish rolling temperature to be 850-900 ℃ in the rolling process, and is more beneficial to the application of the H-shaped steel pile in the building industry.
Description
Technical Field
The invention belongs to the technical field of hot rolling processes, and particularly relates to a rolling method of an H-shaped steel pile for a high-strength building structure.
Background
Compared with the traditional engineering structure, the high-strength steel pile structure has the advantages of light weight, shock resistance, high strength, low energy consumption and the like, and is mainly used for manufacturing multilayer frame columns, portal steel frame columns, platform columns, industrial frameworks and the like. The local stable section is formed in a splicing combination mode in the heavy load bearing building structure so as to ensure the engineering requirements of high strength and high rigidity of the whole. The manufactured structure is mainly applied to the industrial and civil construction fields of shallow sea and swamp zones, building systems, deep foundation pit support systems and the like. With the increasingly narrow urban building space, the deep foundation pit H-shaped steel supporting system is rapidly developed. The design and construction of deep foundation pits for building high-rise buildings have higher and higher requirements on high-strength steel pile steel structures. Therefore, there is a need to develop a high-strength H-shaped steel pile for building structures to optimize the product structure and improve the profit margin of enterprises.
Patent document CN115011870A (hereinafter referred to as document 1) has disclosed a method for manufacturing a high-strength H-shaped steel pile for a building structure, which finally obtains a high-strength H-shaped steel pile for a building structure with good mechanical properties (yield strength greater than 500MPa (up to 555 MPa), tensile strength greater than 600MPa (up to 658 MPa)) by controlling smelting and continuous casting process parameters. However, in response to the increasing demand for the strength of the steel pile steel structure for building high-rise buildings, there is a need for further development of H-shaped steel piles for building structures having higher strength.
Disclosure of Invention
Aiming at the problems in the prior art, the invention provides a rolling method of an H-shaped steel pile for a high-strength building structure, which comprises the following chemical components in percentage by mass: 0.17 to 0.20 percent of C, 0.35 to 0.55 percent of Si, 1.30 to 1.60 percent of Mn, less than or equal to 0.030 percent of P, less than or equal to 0.030 percent of S, 0.10 to 0.13 percent of V, and the balance of Fe and inevitable impurities;
the rolling method comprises the following steps: heating, rough rolling, finish rolling and cooling the special-shaped blank, wherein:
in the heating procedure of the beam blank, the heating temperature of the beam blank is controlled to be 1080-1250 ℃, and the heat preservation time is 200-280min;
in the rough rolling procedure, the rough rolling temperature is controlled to be 1170-1200 ℃, water cooling is adopted for controlled cooling, and the rolling passes are carried out for 3-5 times;
in the finish rolling procedure, the start rolling temperature of finish rolling is controlled to be 920-940 ℃, and the finish rolling adopts warm-waiting rolling and water cooling controlled rolling, and the rolling passes are controlled for 5-7 times; controlling the finish rolling temperature to be 850-900 ℃, and controlling the total rolling reduction of two-stage rolling to be more than or equal to 70%;
in the cooling procedure, the steel is cooled in an air cooling mode, and straightening is carried out after the temperature is reduced to be below 100 ℃.
The invention also provides a high-strength H-shaped steel pile for building structures, which is obtained by rolling through the rolling method.
In some embodiments, the mechanical properties of the H-shaped steel pile for high-strength building structures satisfy: the yield strength is more than or equal to 560MPa, and the tensile strength is more than or equal to 670MPa.
According to the rolling method of the high-strength H-shaped steel pile for the building structure, provided based on the technical scheme, parameters such as the heating temperature of the special-shaped blank is controlled to be 1080-1250 ℃, the rough rolling temperature is 1170-1200 ℃, the finish rolling initial rolling temperature is 920-940 ℃, the finish rolling temperature is 850-900 ℃ and the like in the rolling process, so that the H-shaped steel pile for the building structure with higher strength (the yield strength is more than or equal to 560MPa, and the tensile strength is more than or equal to 670 MPa) can be obtained, and compared with the document 1, the method is more favorable for application in the building industry (particularly building construction of high buildings).
Detailed Description
The invention aims to provide a rolling method of an H-shaped steel pile for a high-strength building structure, and provides the H-shaped steel pile for the high-strength building structure, which is obtained by rolling through the rolling method.
The invention provides a rolling method of an H-shaped steel pile for a high-strength building structure, which comprises the following steps of: heating, rough rolling, finish rolling and cooling the special-shaped blank, wherein:
in the heating procedure of the beam blank, the heating temperature of the beam blank is controlled to be 1080-1250 ℃, the heat preservation time is 200-280min, and high-pressure water is used for descaling after the beam blank is taken out of the furnace;
in the rough rolling procedure, the rough rolling temperature is controlled to be 1170-1200 ℃, water cooling is adopted for controlled cooling, the rolling pass is 3-5 times, and then the rough-rolled beam blank is sent to a finishing mill station for finish rolling;
in the finish rolling procedure, the start rolling temperature of finish rolling is controlled to be 920-940 ℃, and the finish rolling adopts warm rolling and water cooling controlled rolling, wherein the rolling pass is 5-7 times; controlling the finish rolling temperature to be 850-900 ℃, and controlling the total rolling reduction of two-stage rolling to be more than or equal to 70%;
in the cooling process, cooling is carried out by adopting an air cooling mode, straightening is carried out after the temperature is reduced to be below 100 ℃, and finally cutting, sizing and bundling are carried out, wherein the size of a finished product can be UBP305 multiplied by 223 multiplied by 12000mm.
In some embodiments, the high-strength H-shaped steel pile for building structures comprises, by mass: 0.17 to 0.20 percent of C, 0.35 to 0.55 percent of Si, 1.30 to 1.60 percent of Mn, less than or equal to 0.030 percent of P, less than or equal to 0.030 percent of S, 0.10 to 0.13 percent of V, and the balance of Fe and inevitable impurities; can be selected as follows: 0.17 to 0.20 percent of C, 0.37 to 0.42 percent of Si, 1.31 to 1.35 percent of Mn, less than or equal to 0.024 percent of P, less than or equal to 0.014 percent of S, 0.11 to 0.12 percent of V, and the balance of Fe and inevitable impurities.
In some embodiments, the mechanical properties of the H-shaped steel pile for high-strength building structures satisfy: the yield strength is more than or equal to 560MPa, and the tensile strength is more than or equal to 670MPa.
The present invention will be described in detail below with reference to specific examples, which are intended to facilitate understanding of the present invention and are not intended to limit the present invention.
Example 1:
this example is intended to produce a high-strength H-beam pile for building construction, the chemical composition of which is shown in table 1 below. The specific production method comprises the following steps: converter smelting, LF refining, beam blank continuous casting, beam blank heating, rough rolling, finish rolling and cooling; among them, the converter smelting, LF refining, and beam blank continuous casting processes can be performed according to the operation of the above document 1, and parameters of the beam blank heating, rough rolling, and finish rolling processes are controlled as shown in table 2 below. The surface quality of the H-shaped steel pile for the high-strength building structure obtained after rolling is checked, no obvious surface quality defect of a finished product is found, and the surface quality is good; and the mechanical properties of the rolled H-shaped steel pile for the high-strength building structure are tested, and the test results are shown in the following table 3.
Examples 2 to 4
Examples 2 to 4 were carried out in the same manner as in example 1 except that the chemical composition of the H-beam piles for high-strength building structures produced and the control of parameters during rolling were varied, as shown in tables 1 and 2 below. The mechanical properties of the H-shaped steel piles for high strength building structures obtained after rolling in examples 2 to 4 were examined, and the examination results are shown in table 3 below.
Comparative example 1
Comparative example 1 the procedure of example 1 was followed except that the control of parameters during rolling was varied, as shown in tables 1 and 2 below. The mechanical properties of the H-shaped steel pile for the building structure obtained after rolling in comparative example 1 were examined, and the examination results are shown in table 3 below.
Table 1: chemical composition (wt%) of each example of H-shaped steel pile for building structure
| Examples of the invention | C | Si | Mn | P | S | V |
| Example 1 | 0.17 | 0.37 | 1.32 | 0.017 | 0.011 | 0.12 |
| Example 2 | 0.18 | 0.40 | 1.31 | 0.023 | 0.007 | 0.11 |
| Example 3 | 0.19 | 0.39 | 1.35 | 0.024 | 0.010 | 0.12 |
| Example 4 | 0.20 | 0.42 | 1.34 | 0.016 | 0.014 | 0.11 |
| Comparative example 1 | 0.17 | 0.37 | 1.32 | 0.017 | 0.011 | 0.12 |
Table 2: rolling Process parameters for the examples
Table 3: mechanical properties of H-shaped steel piles for building structures of examples
As shown in table 1 to table 3 above, it is understood that the H-shaped steel piles for high-strength building structures produced in examples 1 to 4 all have high-strength characteristics, and satisfy the following mechanical properties: the yield strength is more than or equal to 560MPa (preferably more than or equal to 564 MPa), the tensile strength is more than or equal to 670MPa (preferably more than or equal to 673 MPa), and the elongation A is more than or equal to 23.5 percent. In contrast, comparative example 1, in which the rough rolling temperature and the finish rolling start temperature were controlled to be low during rolling, produced H-shaped steel piles for architectural structures with relatively low strength (in which the yield strength and tensile strength of H-shaped steel piles for architectural structures rolled in example 1 were improved by about 12% relative to those of H-shaped steel piles for architectural structures obtained in comparative example 1).
Finally, it should be noted that: although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that modifications may be made to the embodiments described above, or equivalents may be substituted for elements thereof. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (3)
1. The rolling method of the H-shaped steel pile for the high-strength building structure is characterized by comprising the following chemical components in percentage by mass: 0.17 to 0.20 percent of C, 0.35 to 0.55 percent of Si, 1.30 to 1.60 percent of Mn, less than or equal to 0.030 percent of P, less than or equal to 0.030 percent of S, 0.10 to 0.13 percent of V, and the balance of Fe and inevitable impurities;
the rolling method comprises the following steps: heating, rough rolling, finish rolling and cooling the special-shaped blank, wherein:
in the heating procedure of the beam blank, the heating temperature of the beam blank is controlled to be 1080-1250 ℃, and the heat preservation time is 200-280min;
in the rough rolling procedure, the rough rolling temperature is controlled to be 1170-1200 ℃, water cooling is adopted for controlled cooling, and the rolling passes are carried out for 3-5 times;
in the finish rolling procedure, the start rolling temperature of finish rolling is controlled to be 920-940 ℃, and the finish rolling adopts warm rolling and water cooling controlled rolling, wherein the rolling pass is 5-7 times; controlling the finish rolling temperature to be 850-900 ℃, and controlling the total rolling reduction of two-stage rolling to be more than or equal to 70%;
in the cooling procedure, the steel is cooled in an air cooling mode, and straightening is carried out after the temperature is reduced to be below 100 ℃.
2. A high-strength H-shaped steel pile for building structures, which is rolled by the rolling method of claim 1.
3. The H-shaped steel pile for the high-strength building structure according to claim 2, wherein the mechanical properties of the H-shaped steel pile for the high-strength building structure meet the following requirements: the yield strength is more than or equal to 560MPa, and the tensile strength is more than or equal to 670MPa.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202211176466.8A CN115505705A (en) | 2022-09-26 | 2022-09-26 | Rolling method of H-shaped steel pile for high-strength building structure |
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| CN202211176466.8A CN115505705A (en) | 2022-09-26 | 2022-09-26 | Rolling method of H-shaped steel pile for high-strength building structure |
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| CN115505705A true CN115505705A (en) | 2022-12-23 |
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Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108396231A (en) * | 2018-06-01 | 2018-08-14 | 钢铁研究总院 | A kind of function and service high-strength building structural steel and its manufacturing method |
| CN110484822A (en) * | 2019-09-23 | 2019-11-22 | 包头钢铁（集团）有限责任公司 | A kind of high-strength thick hot-rolling H-shaped piling bar and preparation method thereof |
| WO2021115263A1 (en) * | 2019-12-09 | 2021-06-17 | 山东钢铁股份有限公司 | Hot-rolled h-beam steel based on special-shaped billet rolling and forming, and manufacturing method therefor |
| CN113234995A (en) * | 2021-04-14 | 2021-08-10 | 马鞍山钢铁股份有限公司 | Ultra-thick hot-rolled H-shaped steel with yield strength of 600MPa and production method thereof |
| CN113832397A (en) * | 2021-08-30 | 2021-12-24 | 包头钢铁（集团）有限责任公司 | High-strength H-shaped steel pile and production method thereof |
| CN114959458A (en) * | 2022-05-05 | 2022-08-30 | 包头钢铁（集团）有限责任公司 | Manufacturing method of hot-rolled H-shaped steel for DH36 ocean engineering structure |
| CN115011870A (en) * | 2022-05-05 | 2022-09-06 | 包头钢铁（集团）有限责任公司 | Preparation method of high-strength H-shaped steel pile for building structure |
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- 2022-09-26 CN CN202211176466.8A patent/CN115505705A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108396231A (en) * | 2018-06-01 | 2018-08-14 | 钢铁研究总院 | A kind of function and service high-strength building structural steel and its manufacturing method |
| CN110484822A (en) * | 2019-09-23 | 2019-11-22 | 包头钢铁（集团）有限责任公司 | A kind of high-strength thick hot-rolling H-shaped piling bar and preparation method thereof |
| WO2021115263A1 (en) * | 2019-12-09 | 2021-06-17 | 山东钢铁股份有限公司 | Hot-rolled h-beam steel based on special-shaped billet rolling and forming, and manufacturing method therefor |
| CN113234995A (en) * | 2021-04-14 | 2021-08-10 | 马鞍山钢铁股份有限公司 | Ultra-thick hot-rolled H-shaped steel with yield strength of 600MPa and production method thereof |
| CN113832397A (en) * | 2021-08-30 | 2021-12-24 | 包头钢铁（集团）有限责任公司 | High-strength H-shaped steel pile and production method thereof |
| CN114959458A (en) * | 2022-05-05 | 2022-08-30 | 包头钢铁（集团）有限责任公司 | Manufacturing method of hot-rolled H-shaped steel for DH36 ocean engineering structure |
| CN115011870A (en) * | 2022-05-05 | 2022-09-06 | 包头钢铁（集团）有限责任公司 | Preparation method of high-strength H-shaped steel pile for building structure |
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