CN113584387A - Anti-seismic deformed steel bar with high yield strength and preparation process thereof - Google Patents
Anti-seismic deformed steel bar with high yield strength and preparation process thereof Download PDFInfo
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- CN113584387A CN113584387A CN202110873779.8A CN202110873779A CN113584387A CN 113584387 A CN113584387 A CN 113584387A CN 202110873779 A CN202110873779 A CN 202110873779A CN 113584387 A CN113584387 A CN 113584387A
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- rolling
- steel bar
- deformed steel
- yield strength
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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
- C22C38/02—Ferrous alloys, e.g. steel alloys containing silicon
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B37/00—Control devices or methods specially adapted for metal-rolling mills or the work produced thereby
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B37/00—Control devices or methods specially adapted for metal-rolling mills or the work produced thereby
- B21B37/46—Roll speed or drive motor control
-
- 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
- C22C33/06—Making ferrous alloys by melting using master alloys
-
- 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
Abstract
The invention discloses anti-seismic deformed steel bar with high yield strength and a preparation process thereof, wherein the deformed steel bar comprises the following components in percentage by weight: 0.12-0.25% of C, Si: 0.22-0.90%, Mn: 0.2-1.45%, P: 0.01-0.040%, S: 0.011-0.035%, carbon equivalent: 0.19-0.51% and the balance Fe; the yield strength and the tensile strength of the deformed steel bar are effectively improved by adopting a microalloying method, the stability of the performance of the deformed steel bar is improved by performing rough rolling and fine rolling for many times, the use requirements of most conditions can be met, the good shaping and toughness of the deformed steel bar are ensured, and meanwhile, the deformed steel bar has more stable performance by using a square blank continuous casting method, is simple to operate, saves manpower and material resources and has strong practicability.
Description
Technical Field
The invention relates to anti-seismic deformed steel bar with high yield strength and a preparation process thereof.
Background
The hot-rolled auxiliary reinforcing steel bar for reinforced concrete is a key material widely used in various domestic and foreign building engineering, and is also a key product produced in large quantities by various steel mills in the metallurgical industry of China. With the rapid development of the building industry, a higher quality standard is provided for the product, the performance of the product is required to have the indexes of high strength, good plasticity, weldability, fatigue resistance, cohesiveness and the like, the requirements of high-rise buildings, large-span, earthquake resistance, low temperature resistance and other high-grade building engineering can be met, and the aims of saving steel and reducing cost can be fulfilled.
Most domestic enterprises adopt a microalloying hot rolling process for production, most foreign enterprises adopt a waste heat treatment process for production, the product performance basically can meet the standard requirements, but due to different use states of products approved by domestic and foreign building specifications, the domestic enterprises adopt the waste heat treatment process for producing the high-strength pot ribs to form no mature technology, and the phenomenon of larger fluctuation of performance indexes of the steel bars exists.
Disclosure of Invention
The invention aims to solve the defects of the prior art and provides a composition which comprises the following components in parts by weight: 0.12-0.25% of C, Si: 0.22-0.90%, Mn: 0.2-1.45%, P: 0.01-0.040%, S: 0.011-0.035%, and the balance Fe; the percentage is mass percentage.
An anti-seismic deformed steel bar with high yield strength and a preparation process thereof comprise the following steps:
(1) preparing raw materials: adding the raw materials into a converter according to a proportion for converting;
(2) alloying raw materials: adding niobium, vanadium, titanium and boron into the blown raw material liquid for microalloying, and refining in the next step;
(3) refining: refining the microalloyed raw material liquid by using an LE refining process;
(4) continuous casting of square billets: adding the refined raw material liquid into a casting station for fixing, and casting into a square billet;
(5) cutting: cutting the steel billets into steel billets with different lengths according to different rolling specifications;
(6) rolling: carrying out rough rolling, medium rolling and finish rolling on the cut blank;
(7) cooling treatment: cooling treatment is carried out by adopting an intermittent cooling control mode;
(8) and (3) checking treatment: and after cooling, sizing, inspecting and warehousing the steel blank.
As a further improvement, the rough rolling in step 6 is carried out for 6 passes, and the rolling speed is as follows: 0.34m/s-1.75 m/s; the rolling time is 46-48 s.
As a further improvement, the medium rolling in the step 6 is carried out for 4 passes, and the rolling speed is as follows:
2.40m/s-4.32 m/s; the rolling time is 46-48 s.
As a further improvement, the finish rolling in the step 6 is carried out for 4 passes, and the rolling speed is 5.50m/s-8.50 m/s; the rolling time is 46-48 s.
As a further improvement, the refining in the step 3 heats the raw materials to 960-1000 ℃, the heating time is more than or equal to 1.5 hours, and the white slag holding time is more than or equal to 20 minutes.
Has the advantages that:
the method adopts a microalloying method, effectively improves the yield strength and the tensile strength of the deformed steel bar, improves the stability of the performance of the deformed steel bar through repeated rough rolling and fine rolling, can meet the use requirements of most conditions, ensures the good shaping and toughness of the deformed steel bar, and simultaneously ensures the more stable performance of the deformed steel bar by using a square blank continuous casting method, has simple operation, saves manpower and material resources and has strong practicability.
Detailed Description
For the purpose of enhancing understanding of the present invention, the present invention will be further described in detail with reference to the following examples, which are provided for illustration only and are not to be construed as limiting the scope of the present invention.
Example 1:
the anti-seismic deformed steel bar with high yield strength comprises the following components in percentage by weight: 0.12-0.25% of C, Si: 0.22-0.90%, Mn: 0.2-1.45%, P: 0.01-0.040%, S: 0.011-0.035%, and the balance Fe; the percentage is mass percentage.
The anti-seismic deformed steel bar with high yield strength and the preparation process thereof comprise the following steps:
(1) preparing raw materials: adding the raw materials into a converter according to a proportion for converting;
(2) alloying raw materials: niobium, vanadium, titanium and boron are added into the blown raw material liquid for microalloying, the next refining is carried out, and the yield strength and the tensile strength of the deformed steel bar are effectively improved by adopting a microalloying method;
(3) refining: refining the microalloyed raw material liquid by using an LE refining process, wherein the refining is to heat the raw material to 960 ℃, the heating time is more than or equal to 1.5 hours, and the white slag holding time is more than or equal to 20 minutes.
(4) Continuous casting of square billets: the refined raw material liquid is added into a pouring station for fixing, and a square steel billet is poured, so that the deformed steel bar has more stable performance, simple operation, manpower and material resources conservation and strong practicability by using a square billet continuous casting method;
(5) cutting: cutting the steel billets into steel billets with different lengths according to different rolling specifications;
(6) rolling: carrying out rough rolling and medium rolling finish rolling on the cut blank, wherein the rough rolling is carried out for 6 passes in total, and the rolling speed is as follows: 1.75 m/s; rolling time 47s, 4 passes of medium rolling, rolling speed: 4.32 m/s; the rolling time is 48s, the finish rolling is carried out for 4 passes, and the rolling speed is 50 m/s; the rolling time is 48s, and the stability of the performance of the deformed steel bar is improved through multiple times of rough rolling and fine rolling, so that the use requirements of most conditions can be met, and the good shaping and toughness of the deformed steel bar are ensured;
(7) cooling treatment: cooling treatment is carried out by adopting an intermittent cooling control mode;
(8) and (3) checking treatment: and after cooling, sizing, inspecting and warehousing the steel blank.
Example 2:
the anti-seismic deformed steel bar with high yield strength comprises the following components in percentage by weight: 0.12-0.25% of C, Si: 0.22-0.90%, Mn: 0.2-1.45%, P: 0.01-0.040%, S: 0.011-0.035%, and the balance Fe; the percentage is mass percentage.
The anti-seismic deformed steel bar with high yield strength and the preparation process thereof comprise the following steps:
(1) preparing raw materials: adding the raw materials into a converter according to a proportion for converting;
(2) alloying raw materials: niobium, vanadium, titanium and boron are added into the blown raw material liquid for microalloying, the next refining is carried out, and the yield strength and the tensile strength of the deformed steel bar are effectively improved by adopting a microalloying method;
(3) refining: refining the microalloyed raw material liquid by using an LE refining process, wherein the refining is carried out by heating the raw material to 980 ℃, the heating time is more than or equal to 1.5 hours, and the white slag holding time is more than or equal to 20 minutes.
(4) Continuous casting of square billets: the refined raw material liquid is added into a pouring station for fixing, and a square steel billet is poured, so that the deformed steel bar has more stable performance, simple operation, manpower and material resources conservation and strong practicability by using a square billet continuous casting method;
(5) cutting: cutting the steel billets into steel billets with different lengths according to different rolling specifications;
(6) rolling: carrying out rough rolling and medium rolling finish rolling on the cut blank, wherein the rough rolling is carried out for 6 passes in total, and the rolling speed is as follows: 0.35; rolling time 46s, rolling for 4 passes in the middle rolling process, rolling speed: 4.32 m/s; the rolling time is 48s, the finish rolling is carried out for 4 passes, and the rolling speed is 5.6 m/s; the rolling time is 46, and the stability of the performance of the deformed steel bar is improved through multiple times of rough rolling and fine rolling, so that the use requirements of most conditions can be met, and the good shaping and toughness of the deformed steel bar are ensured;
(7) cooling treatment: cooling treatment is carried out by adopting an intermittent cooling control mode;
(8) and (3) checking treatment: and after cooling, sizing, inspecting and warehousing the steel blank.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents, improvements and the like that fall within the spirit and principle of the present invention are intended to be included therein.
Claims (6)
1. The utility model provides a antidetonation type screw-thread steel of high yield strength which characterized in that, the screw-thread steel material ratio is: 0.12-0.25% of C, Si: 0.22-0.90%, Mn: 0.2-1.45%, P: 0.01-0.040%, S: 0.011-0.035%, and the balance Fe; the percentage is mass percentage.
2. The preparation process of the anti-seismic deformed steel bar with high yield strength as claimed in claim 1, which is characterized by comprising the following steps:
(1) preparing raw materials: adding the raw materials into a converter according to a proportion for converting;
(2) alloying raw materials: adding niobium, vanadium, titanium and boron into the blown raw material liquid for microalloying, and refining in the next step;
(3) refining: refining the microalloyed raw material liquid by using an LE refining process;
(4) continuous casting of square billets: adding the refined raw material liquid into a casting station for fixing, and casting into a square billet;
(5) cutting: cutting the steel billets into steel billets with different lengths according to different rolling specifications;
(6) rolling: carrying out rough rolling, medium rolling and finish rolling on the cut blank;
(7) cooling treatment: cooling treatment is carried out by adopting an intermittent cooling control mode;
(8) and (3) checking treatment: and after cooling, sizing, inspecting and warehousing the steel blank.
3. The process for preparing the anti-seismic deformed steel bar with high yield strength as claimed in claim 2, wherein the rough rolling in the step 6 is performed for 6 passes in total, and the rolling speed is as follows: 0.34m/s-1.75 m/s; the rolling time is 46-48 s.
4. The process for preparing the anti-seismic deformed steel bar with high yield strength as claimed in claim 2, wherein the medium rolling in the step 6 is performed for 4 passes, and the rolling speed is as follows: 2.40m/s-4.32 m/s; the rolling time is 46-48 s.
5. The process for preparing the shock-resistant deformed steel bar with high yield strength as claimed in claim 2, wherein the finish rolling in the step 6 is carried out for 4 passes at a rolling speed of 5.50m/s-8.50 m/s; the rolling time is 46-48 s.
6. The process for preparing the anti-seismic deformed steel bar with high yield strength as claimed in claim 2, wherein the refining in the step 3 heats the raw materials to 960-1000 ℃, the heating time is more than or equal to 1.5 hours, and the white slag holding time is more than or equal to 20 minutes.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN202110873779.8A CN113584387A (en) | 2021-07-30 | 2021-07-30 | Anti-seismic deformed steel bar with high yield strength and preparation process thereof |
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| CN202110873779.8A CN113584387A (en) | 2021-07-30 | 2021-07-30 | Anti-seismic deformed steel bar with high yield strength and preparation process thereof |
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Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101275197A (en) * | 2007-07-19 | 2008-10-01 | 天津钢铁有限公司 | High-strength rebar and manufacturing process thereof |
| CN107513663A (en) * | 2017-09-29 | 2017-12-26 | 四川德胜集团钒钛有限公司 | A kind of HRB500E high performance steels and its rolling mill practice |
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2021
- 2021-07-30 CN CN202110873779.8A patent/CN113584387A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101275197A (en) * | 2007-07-19 | 2008-10-01 | 天津钢铁有限公司 | High-strength rebar and manufacturing process thereof |
| CN107513663A (en) * | 2017-09-29 | 2017-12-26 | 四川德胜集团钒钛有限公司 | A kind of HRB500E high performance steels and its rolling mill practice |
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Application publication date: 20211102 |
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