CN115181909A - Production method of low-cost HRB400E high-strength anti-seismic steel bar - Google Patents
Production method of low-cost HRB400E high-strength anti-seismic steel bar Download PDFInfo
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- CN115181909A CN115181909A CN202210868475.7A CN202210868475A CN115181909A CN 115181909 A CN115181909 A CN 115181909A CN 202210868475 A CN202210868475 A CN 202210868475A CN 115181909 A CN115181909 A CN 115181909A
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- rolling
- steel bar
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- 229910000831 Steel Inorganic materials 0.000 title claims abstract description 25
- 239000010959 steel Substances 0.000 title claims abstract description 25
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 18
- 238000005096 rolling process Methods 0.000 claims abstract description 38
- 238000001816 cooling Methods 0.000 claims abstract description 10
- 229910045601 alloy Inorganic materials 0.000 claims abstract description 8
- 239000000956 alloy Substances 0.000 claims abstract description 8
- 229910052710 silicon Inorganic materials 0.000 claims abstract description 6
- 238000010438 heat treatment Methods 0.000 claims description 8
- 238000003723 Smelting Methods 0.000 claims description 7
- 238000000034 method Methods 0.000 claims description 6
- 238000004806 packaging method and process Methods 0.000 claims description 5
- 229910052799 carbon Inorganic materials 0.000 claims description 3
- 238000009749 continuous casting Methods 0.000 claims description 3
- 239000012535 impurity Substances 0.000 claims description 3
- 238000005266 casting Methods 0.000 claims description 2
- 239000004615 ingredient Substances 0.000 claims description 2
- 239000000463 material Substances 0.000 claims description 2
- 229910052698 phosphorus Inorganic materials 0.000 claims description 2
- 238000005070 sampling Methods 0.000 claims description 2
- 239000011572 manganese Substances 0.000 abstract description 6
- 229910052748 manganese Inorganic materials 0.000 abstract description 5
- PWHULOQIROXLJO-UHFFFAOYSA-N Manganese Chemical compound [Mn] PWHULOQIROXLJO-UHFFFAOYSA-N 0.000 abstract description 4
- 239000010703 silicon Substances 0.000 abstract description 4
- 229910000734 martensite Inorganic materials 0.000 abstract description 3
- 229910001294 Reinforcing steel Inorganic materials 0.000 description 3
- SKKMWRVAJNPLFY-UHFFFAOYSA-N azanylidynevanadium Chemical compound [V]#N SKKMWRVAJNPLFY-UHFFFAOYSA-N 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 229910001562 pearlite Inorganic materials 0.000 description 2
- 229910000859 α-Fe Inorganic materials 0.000 description 2
- 229910001199 N alloy Inorganic materials 0.000 description 1
- 229910001295 No alloy Inorganic materials 0.000 description 1
- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical compound [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 description 1
- 238000005275 alloying Methods 0.000 description 1
- 238000010923 batch production Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000007689 inspection Methods 0.000 description 1
- 229910052758 niobium Inorganic materials 0.000 description 1
- 239000010955 niobium Substances 0.000 description 1
- GUCVJGMIXFAOAE-UHFFFAOYSA-N niobium atom Chemical compound [Nb] GUCVJGMIXFAOAE-UHFFFAOYSA-N 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 239000010936 titanium Substances 0.000 description 1
- 229910052719 titanium Inorganic materials 0.000 description 1
- 229910052720 vanadium Inorganic materials 0.000 description 1
- LEONUFNNVUYDNQ-UHFFFAOYSA-N vanadium atom Chemical compound [V] LEONUFNNVUYDNQ-UHFFFAOYSA-N 0.000 description 1
Classifications
-
- 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
- C22C38/02—Ferrous alloys, e.g. steel alloys containing silicon
-
- 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
- B21B1/16—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 wire rods, bars, merchant bars, rounds wire or material of like small cross-section
- B21B1/163—Rolling or cold-forming of concrete reinforcement bars or wire ; Rolls therefor
-
- 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
- B21B1/46—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 metal immediately subsequent to continuous casting
- B21B1/463—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 metal immediately subsequent to continuous casting in a continuous process, i.e. the cast not being cut before rolling
-
- 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
- C21D8/06—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of rods or wires
- C21D8/065—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of rods or wires of ferrous alloys
-
- 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
- C21D8/06—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of rods or wires
- C21D8/08—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of rods or wires for concrete reinforcement
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C33/00—Making ferrous alloys
- C22C33/04—Making ferrous alloys by melting
-
- 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
-
- 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
- C21D2211/00—Microstructure comprising significant phases
- C21D2211/005—Ferrite
-
- 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
- C21D2211/00—Microstructure comprising significant phases
- C21D2211/009—Pearlite
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Manufacturing & Machinery (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Crystallography & Structural Chemistry (AREA)
- Heat Treatment Of Steel (AREA)
Abstract
The invention belongs to the field of metallurgical steel rolling, and relates to a production method of a low-cost HRB400E high-strength anti-seismic steel bar. The idea of high silicon, medium manganese and no addition of any alloy element is adopted. The rolling process comprises the following steps: controlled rolling and controlled cooling are adopted; the invention adopts the idea of high silicon, medium manganese and no addition of any alloy element, realizes vanadium-free rolling with the specification of HRB400E phi 14mm or below, has lower production cost, reduces 43 yuan/ton per ton of steel, has excellent comprehensive performance and has no tempered martensite structure in metallographic structure.
Description
Technical Field
The invention belongs to the field of metallurgical steel rolling, and relates to a production method of a low-cost HRB400E high-strength anti-seismic reinforcing steel bar.
Background
The new national standard GB/T1499.2-2018 requires that the metallographic structure of the steel bar is mainly ferrite plus pearlite, and a tempered martensite structure should not appear on a base circle. In order to meet the requirements of new national standards, at present, domestic deformed steel bar manufacturers mainly adopt alloying processes of vanadium, titanium, niobium and the like for production, and common deformed steel bar products adopt vanadium-nitrogen microalloying processes for production; however, at present, with the continuous increase of the demand of vanadium-nitrogen alloy, the alloy price continuously rises, and the production cost is gradually increased, so that a product with the performance and the metallographic structure meeting the national standard requirements is obtained by adding a small amount of or no alloy elements and controlling the rolling process. The alloy cost is reduced, and the market competitiveness of the product is improved.
Disclosure of Invention
In view of this, the invention aims to provide a low-cost HRB400E high-strength anti-seismic reinforcing steel bar production method, which realizes narrow range control of C, si and Mn elements and can conveniently realize combined batch production.
In order to achieve the purpose, the invention provides the following technical scheme: a production method of a low-cost HRB400E high-strength anti-seismic steel bar comprises the following steps:
s1, preparing materials: the deformed steel bar is prepared from the following components in percentage by mass: 0.23 to 0.25 percent of C, 0.50 to 0.60 percent of Si, 1.05 to 1.20 percent of MnP, less than or equal to 0.040 percent of P, less than or equal to 0.040 percent of S, and the balance of Fe and impurities;
s2, smelting: smelting in a converter, calculating required alloy according to the component requirements of the ingredients, and smelting in the converter;
s3, continuous casting: casting the molten steel into a qualified square billet;
s4, heating: conveying the square billets to a heating furnace for heating, wherein the heating temperature is 1050-1200 ℃;
s5, rolling: and (3) feeding the heated square billet into a rolling mill for rolling, wherein the rolling specification is phi 12 mm-phi 14mm, and feeding the square billet into a cooling bed after the rolling is finished.
S6, inspecting, packaging and warehousing: sampling and inspecting the produced deformed steel bar, and packaging and warehousing.
Optionally, in the step S3, the required cross section is 170mm × 170mm × 12mm.
Optionally, in the step S5, the rolling process requires: the initial rolling temperature is 1000 +/-15 ℃; controlling the temperature of rolling finish rolling I by two stages: 830 +/-15 ℃, finish rolling II temperature: 810 +/-15 ℃.
Optionally, in the step S5, the rolling grade is HRB400E.
Optionally, in the step S5, the requirement of the controlled cooling process is that the temperature of the upper cooling bed is: 800 +/-10 ℃.
The invention has the beneficial effects that: the low-cost HRB400E high-strength anti-seismic reinforcing steel bar production method adopts the idea of high silicon, medium manganese and no addition of any alloy element, realizes vanadium-free rolling with the specification of HRB400E phi less than 14mm, has lower production cost, reduces 43 yuan/ton per ton of steel, has excellent comprehensive performance and has no tempered martensite structure in metallographic structure.
Additional advantages, objects, and features of the invention will be set forth in part in the description which follows and in part will become apparent to those having ordinary skill in the art upon examination of the following or may be learned from practice of the invention. The objectives and other advantages of the invention may be realized and attained by the means of the instrumentalities and combinations particularly pointed out hereinafter.
Detailed Description
The embodiments of the present invention are described below with reference to specific embodiments, and other advantages and effects of the present invention will be easily understood by those skilled in the art from the disclosure of the present specification. The invention is capable of other and different embodiments and of being practiced or of being carried out in various ways, and its several details are capable of modification in various respects, all without departing from the spirit and scope of the present invention.
In the specific embodiment 1, the method comprises the following steps of,
a production method of a low-cost HRB400E high-strength anti-seismic steel bar mainly comprises the steps of smelting of converter molten steel components, square billet continuous casting, bar rolling, feeding to a cooling bed, inspection, packaging and warehousing. The idea of high silicon, medium manganese and no addition of any alloy element is adopted. The rolling process comprises the following steps: controlled rolling and controlled cooling are adopted.
The nominal diameter phi 14mm comprises the following chemical components in percentage by mass: 0.24% of C, 0.57% of Si, 1.16% of Mn, 0.027% of P, 0.016% of S, and the balance of Fe and impurities.
A rolling procedure: the initial rolling temperature: 1003 ℃, rolling by adopting two-stage control, and finish rolling at the temperature of I: 827 ℃, finish rolling II temperature: 815 ℃; and (3) a cold control stage: temperature of the upper cooling bed: 804 deg.C.
The invention realizes vanadium-free rolling and metallographic structure of the specification phi of 14mmHRB400E below: ferrite and pearlite, and the mechanical properties are as follows: yield strength 430/435MPa, tensile strength 590/590MPa, qu Biao ratio: 1.07/1.08, yield ratio: 1.36/1.37, agt: 18.1-17.7%, and the steel per ton can be reduced by 43 yuan/ton.
Finally, the above embodiments are only intended to illustrate the technical solutions of the present invention and not to limit the present invention, and although the present invention has been described in detail with reference to the preferred embodiments, it will be understood by those skilled in the art that modifications or equivalent substitutions may be made on the technical solutions of the present invention without departing from the spirit and scope of the technical solutions, and all of them should be covered by the claims of the present invention.
Claims (5)
1. A production method of a low-cost HRB400E high-strength anti-seismic steel bar is characterized by comprising the following steps:
s1, preparing materials: the deformed steel bar is prepared from the following components in percentage by mass: 0.23 to 0.25 percent of C, 0.50 to 0.60 percent of Si, 1.05 to 1.20 percent of MnP, less than or equal to 0.040 percent of P, less than or equal to 0.040 percent of S, and the balance of Fe and impurities;
s2, smelting: smelting in a converter, calculating required alloy according to the component requirements of the ingredients, and smelting in the converter;
s3, continuous casting: casting the molten steel into a qualified square billet;
s4, heating: conveying the square billet to a heating furnace for heating, wherein the heating temperature is 1050-1200 ℃;
s5, rolling: and (3) feeding the heated square billet into a rolling mill for rolling, wherein the rolling specification is phi 12 mm-phi 14mm, and feeding the square billet into a cooling bed after the rolling is finished.
S6, inspecting, packaging and warehousing: sampling and inspecting the produced deformed steel bar, and packaging and warehousing.
2. The production method of the low-cost HRB400E high-strength aseismic steel bar according to claim 1, characterized in that: in the step S3, the required section is 170mm × 170mm × 12mm.
3. The production method of the low-cost HRB400E high-strength aseismic steel bar according to claim 1, characterized in that: in the step S5, the rolling process requires: the initial rolling temperature is 1000 +/-15 ℃; rolling is controlled in two stages to finish rolling I temperature: 830 +/-15 ℃, finish rolling II temperature: 810 +/-15 ℃.
4. The production method of the low-cost HRB400E high-strength aseismic steel bar according to claim 1, characterized in that: in the step S5, the rolling grade is HRB400E.
5. The production method of the low-cost HRB400E high-strength aseismic steel bar according to claim 1, characterized in that: in the step S5, the requirement of the controlled cooling process is that the temperature of an upper cooling bed is as follows: 800 +/-10 ℃.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210868475.7A CN115181909A (en) | 2022-07-22 | 2022-07-22 | Production method of low-cost HRB400E high-strength anti-seismic steel bar |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210868475.7A CN115181909A (en) | 2022-07-22 | 2022-07-22 | Production method of low-cost HRB400E high-strength anti-seismic steel bar |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN115181909A true CN115181909A (en) | 2022-10-14 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202210868475.7A Pending CN115181909A (en) | 2022-07-22 | 2022-07-22 | Production method of low-cost HRB400E high-strength anti-seismic steel bar |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN115181909A (en) |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103103437A (en) * | 2013-02-01 | 2013-05-15 | 首钢水城钢铁（集团）有限责任公司 | Method for producing HRBF400E fine-grain aseismic reinforcement |
| CN110760757A (en) * | 2019-08-14 | 2020-02-07 | 钢铁研究总院 | Low-cost strengthening process of hot-rolled steel bar |
| CN114150223A (en) * | 2021-11-29 | 2022-03-08 | 石横特钢集团有限公司 | High-strength anti-seismic reinforcing steel bar special for railway and production process thereof |
| US20220220573A1 (en) * | 2019-05-23 | 2022-07-14 | Institute Of Research Of Iron & Steel, Jiangsu Province/Sha-Steel, Co., Ltd. | High-strength steel bar and production method thereof |
-
2022
- 2022-07-22 CN CN202210868475.7A patent/CN115181909A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103103437A (en) * | 2013-02-01 | 2013-05-15 | 首钢水城钢铁（集团）有限责任公司 | Method for producing HRBF400E fine-grain aseismic reinforcement |
| US20220220573A1 (en) * | 2019-05-23 | 2022-07-14 | Institute Of Research Of Iron & Steel, Jiangsu Province/Sha-Steel, Co., Ltd. | High-strength steel bar and production method thereof |
| CN110760757A (en) * | 2019-08-14 | 2020-02-07 | 钢铁研究总院 | Low-cost strengthening process of hot-rolled steel bar |
| CN114150223A (en) * | 2021-11-29 | 2022-03-08 | 石横特钢集团有限公司 | High-strength anti-seismic reinforcing steel bar special for railway and production process thereof |
Non-Patent Citations (1)
| Title |
|---|
| 康永林，孙建林等, 冶金工业出版社 * |
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Application publication date: 20221014 |
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