CN101988172A - High-strength shock-resistance steel bars and production method thereof - Google Patents
High-strength shock-resistance steel bars and production method thereof Download PDFInfo
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Abstract
The invention discloses high-strength shock-resistance steel bars and a production method thereof. The yield strength of the high-strength shock-resistance steel bars is 500 to 1200MPa, wherein alloy elements are not required to be added into the high-strength shock-resistance steel bars the yield strength of which is below 600MP, and the components in the steel by the weight percentages includes 0.08 to 0.35% of C, 1.8 to 3.2% of Mn, 0.2 to 1.5% of Si, 0 to 1.0% of Cr, 0 to 0.02% of P and 0 to 0.01% of S, and a small amount of micro-alloy elements of V, Nb and the like are added if necessary. The steel bars have the complex phase tissues in the types of grain boundary allotriomorphic ferrite/granular bainite, lower bainite/martensite and the like and can obtain good strength and toughness coordination by controlling the ratio, the morphology and the distribution of each phase. In addition, the steel bars have extremely strong yield ratio, and the tensile strength allowance of the high-strength shock-resistance steel bars is higher than that of the existing high-strength steel bars by 50%.
Description
Technical field
The invention belongs to steel alloy smelts and processing technique field.Specifically, the present invention relates to a kind of anti-seismic steel bar for building and preparation method thereof.
Background technology
Predicted for the year ends 2010, about 19,000 ten thousand tons of China's steel aggregate consumption for building accounts for 53% of steel aggregate consumption, and wherein the Twisted Steel consumption is 7,200 ten thousand tons, accounts for 38% of construction(al)steel; 5,200 ten thousand tons of wire rod consumptions account for 27% of construction(al)steel; 2,400 ten thousand tons of thin plate consumptions account for 13% of construction(al)steel, occupy significant role in the national economic development.Whenever the quality of construction work and safety ratio all will be put into crucial status.More and more Yan Ge engineering structure earthquake resistant design code is also more and more higher to the yield strength and the plastic property requirement of reinforcing bar, also requires reinforcing bar that higher strong flexor ratio (Rm/Re1) and toughness plasticity are arranged simultaneously.Finish rolling deformed bar is the former federal republic of germany exploitation seventies in 20th century and obtains Patent right product that have connection, anchoring handy and safe, advantages such as easy construction, saving have solved the reinforcing bar Welding Problems preferably, have been widely used in building field.The performance that has improved reinforcing bar is greatly used in microalloying, grain refining, controlled rolling and controlled cooling, the invention of rolling back technology such as Heat Treatment, and the development of anti-seismic steel bar for building is the product that modern metallurgical production technology combines with the Physical Metallurgy achievement.
The anti-seismic steel bar yield strength of exploitation mainly concentrates on the 500MPa level at present, and intensity rank is lower; Contain multiple alloying elements such as Nb, V, the cost of alloy height; And all adopt controlled rolling and controlled cooling method, complex process, energy-output ratio are big." the HRB500E high-performance anti-seismic steel bar and the production method thereof " of Wuhan Iron And Steel Group Kunming Iron ﹠ Steel Co., Ltd application for example, " HRB500E V-N high-strength anti-seismic steel bar and production method thereof ", " HRB500E Nb-B composite microalloy microalloy anti-seismic steel bar and production method thereof "; " a kind of 500MPa level high-strength quake-proof reinforcing steel bar production technique " of Central South University's application; " steel for high strength shock-proof hot-rolled steel bar " of Ma'anshan Iron and Steel Co., Ltd's application all need strict cooling controlling and rolling controlling process, and intensity rank is all at 500MPa.Along with the raising of engineering structure to the building bar requirement of strength, how to prepare the yield strength rank more than 500MPa and superstrength anti-seismic steel bar for building with low cost be the practical problems of needs solution at present.
Summary of the invention
One of purpose of the present invention provides the above high-strength anti-seismic steel bar of a kind of HRB500.This reinforcing bar has the heterogeneous structure of grain boundary allotriomorphic ferrite/granular bainite or bainite/martensite, ratio and size by each phase in the control heterogeneous structure, obtain good combination of strength and toughness, simultaneously, this reinforcing bar composition and manufacturing process are simple, tensile strength and yield strength ratio height, and have good weldability and shock resistance.
Another object of the present invention provides a kind of manufacture method of above-mentioned high-strength anti-seismic steel bar, this method technology is simple, by the interpolation of simple elements and specific heat treatment mode, produced high strength, the high-strength anti-seismic steel bar that shock resistance and weldability are all very good.
To achieve these goals, the present invention adopts following technical scheme:
A kind of high-strength anti-seismic steel bar, after conventional steel-making smelting, continuous casting becomes excellent base, and the weight percent of each composition is in the steel:
C：0.08～0.15wt％
Mn：1.8～3.2wt％
Si：0.2～1.5wt％
Cr：0～1.0wt％
P：0～0.02wt％
S：0～0.01wt％
All the other are Fe,
Rod base high temperature rolling obtains reinforcing bar, slow cooling behind ℃ collection bundling of reinforcing bar air cooling to 200～400, perhaps air cooling is handled behind room temperature collection bundling and 200～400 ℃ of destressings and is obtained high-strength anti-seismic steel bar, the microstructure of reinforcing bar is the heterogeneous structure of grain boundary allotriomorphic ferrite and granular bainite, its intensity is more than the HRB500 level, and each component is in the reinforcing bar microstructure:
Grain boundary allotriomorphic ferrite--------------10～40%
Granular bainite-----------------------50～90%.
Further, the diameter in reinforcing bar cross section is 25-50mm.
Preferably, the composition of described steel is:
C：?0.08～0.15wt％
Mn：1.8～3.2wt％
Si：0.2～1.5wt％
Cr：0.1～1.20wt％
P：?0～0.02wt％
S：?0～0.01wt％
All the other are Fe.
A kind of manufacture method of high-strength anti-seismic steel bar may further comprise the steps:
(1) smelt with conventional process for making after, continuous casting becomes excellent base, the weight percent that makes each composition in the steel as mentioned above;
(2) described excellent base is heated to 1200～1250 ℃, be incubated 0.5～2 hour;
When (3) described excellent base being cooled to 1050～1100 ℃, excellent base is rolled, finishes rollingly during to 800～980 ℃, obtain reinforcing bar;
(4) described reinforcing bar air cooling was handled 2～6 hours 200～400 ℃ of destressings to room temperature and with the reinforcing bar behind the air cooling, collected bundling and slow cooling during perhaps with described reinforcing bar air cooling to 200～400 ℃.
A kind of high-strength anti-seismic steel bar, after conventional steel-making smelting, continuous casting becomes excellent base, and the weight percent of each composition is in the steel:
C：?0.20～0.30wt％
Mn：1.8～3.2wt％
Si：0.5～1.0wt％
Cr：0.1～1.0wt％
P：?0～0.02wt％
S：?0～0.01wt％
All the other are Fe,
Rod base high temperature rolling obtains reinforcing bar, slow cooling behind ℃ collection bundling of reinforcing bar air cooling to 200～400, perhaps air cooling is handled to room temperature and 200～400 ℃ of destressings and is obtained high-strength anti-seismic steel bar, the microstructure of reinforcing bar is bainite and martensitic heterogeneous structure, its intensity is more than the HRB800 level, and each component is in the reinforcing bar microstructure:
Bainite--------------10～40%;
Martensite---------------60～90%.
Preferably, the intensity of described reinforcing bar is more than the HRB933.
Preferably, the diameter in reinforcing bar cross section is 25-50mm.
A kind of method of high-strength anti-seismic steel bar is characterized in that this method may further comprise the steps:
(1) with after the conventional process for making smelting, continuous casting becomes excellent base, makes the weight percent of each composition in the steel be:
C：?0.20～0.30wt％
Mn：1.8～3.2wt％
Si：0.5～1.0wt％
Cr：0.1～1.2wt％
P：?0～0.02wt％
S：?0～0.01wt％
All the other are Fe,
(2) above-mentioned reinforcing bar blank is heated to 1200～1250 ℃, be incubated 0.5～2 hour;
When (3) above-mentioned excellent base being cooled to 1050～1100 ℃, excellent base is rolled, finishes rollingly during to 900～980 ℃, obtain bar;
(4) described reinforcing bar air cooling was handled 2～6 hours 200～400 ℃ of destressings to room temperature and with the reinforcing bar behind the air cooling, collected bundling and slow cooling during perhaps with described reinforcing bar air cooling to 200～400 ℃.
A kind of high-strength anti-seismic steel bar, after conventional steel-making smelting, continuous casting becomes excellent base, and the weight percent of each composition is in the steel:
C：?0.20～0.31wt％
Mn：1.8～3.2wt％
Si：0.5～1.0wt％
Cr：0～1.5wt％
Ti：0.005～0.04wt％
V：?0～0.04wt％
P：?0～0.02wt％
S：?0～0.01wt％
All the other are Fe,
Rod base high temperature rolling obtains reinforcing bar, slow cooling behind ℃ collection bundling of reinforcing bar air cooling to 200～400, perhaps air cooling is handled to room temperature and 200～400 ℃ of destressings and is obtained high-strength anti-seismic steel bar, its intensity is between HRB800～1200 grade, the microstructure of reinforcing bar is two or more the heterogeneous structure that comprises in grain boundary allotriomorphic ferrite, granular bainite, lower bainite, the martensite, comprises in the reinforcing bar microstructure:
Bainite---------------10～40%;
Martensite---------------50～90%.
Preferably, the diameter of reinforcing bar is 20-50mm.
Further, the composition of described steel is:
C：?0.20～0.31wt％
Mn：1.8～3.2wt％
Si：0.5～1.0wt％
Cr：0.5～1.0wt％
Ti：0.02～0.03wt％
V：?0.02～0.04wt％
P：?0～0.02wt％
S：?0～0.01wt％
All the other are Fe.
A kind of method of high-strength anti-seismic steel bar is characterized in that this method may further comprise the steps:
(1) with after the conventional process for making smelting, continuous casting becomes excellent base, makes the weight percent of each composition in the steel be:
C：?0.20～0.31wt％
Mn：1.8～3.2wt％
Si：0.5～1.0wt％
Cr：0～1.5wt％
Ti：0.005～0.04wt％
V：?0～0.04wt％
P：?0～0.02wt％
S：?0～0.01wt％
All the other are Fe,
(2) above-mentioned reinforcing bar blank is heated to 1200～1250 ℃, be incubated 0.5～2 hour;
When (3) above-mentioned excellent base being cooled to 1050～1100 ℃, excellent base is rolled, finishes rollingly during to 900～980 ℃, obtain bar;
(4) described reinforcing bar air cooling was handled 2～6 hours 200～400 ℃ of destressings to room temperature and with the reinforcing bar behind the air cooling, collected bundling and slow cooling during perhaps with described reinforcing bar air cooling to 200～400 ℃.
Compared with prior art, the present invention has the following advantages: 1) alloying element is simple, and is cheap; 2) technology is simple; 3) reinforcing bar strong flexor ratio height is beneficial to antidetonation.
Embodiment
Below method of the present invention is elaborated, but these embodiment only are illustrative purposes, are not intended to scope of the present invention is carried out any qualification.
The preparation of the high-strength anti-seismic steel bar that the 1-1HRB500 level is above
HRB500 level higher level high-strength anti-seismic steel bar of the present invention, after conventional steel-making smelting, the weight percent of each composition is in the steel:
C：?0.08～0.15wt％
Mn：1.8～3.2wt％
Si：0.2～1.5wt％
Cr：0～1.0wt％
P：?0～0.02wt％
S：?0～0.01wt％
All the other are Fe.
Embodiment 1
At first, after smelting with conventional process for making, continuous casting becomes the pole base, makes in the steel weight percent of each composition as shown in table 1; Above-mentioned steel billet is heated to 1200 ℃ insulation 45min; Be rolled when above-mentioned steel billet is cooled to 1000 ℃, finish rollingly during to 850 ℃, obtain the reinforcing bar of diameter 45mm, with above-mentioned reinforcing bar air cooling to room temperature.
Embodiment 2
At first, after smelting with conventional process for making, continuous casting becomes steel billet, makes in the steel weight percent of each composition as shown in table 1; Above-mentioned reinforcing bar blank is heated to 1200 ℃ insulation 45min; When above-mentioned reinforcing bar blank is cooled to 1050 ℃, the reinforcing bar blank is rolled, finishes rollingly during to 900 ℃, obtain the reinforcing bar that diameter is 40mm, above-mentioned reinforcing bar air cooling to 300 ℃ is collected bundling, slow cooling.
Table 1, embodiment of the invention chemical ingredients (wt%)
σ assesses reinforcing bar by the measuring method that adopts conventional iron and steel intensity, tensile strength etc., and the performance perameter of its measurement is referring to table 2.
The technology of table 2, the embodiment of the invention, microstructure and property
1-2.HRB800 the preparation of the high-strength anti-seismic steel bar that level is above
HRB800 level higher level high-strength anti-seismic steel bar of the present invention, after conventional steel-making smelting, the weight percent of each composition is in the steel:
C：?0.20～0.30wt％
Mn：1.8～3.2wt％
Si：0.5～1.0wt％
Cr：0.1～1.2wt％
P：?0～0.02wt％
S：?0～0.01wt％
All the other are Fe.
Embodiment 3
At first, after smelting with conventional process for making, continuous casting becomes the reinforcing bar blank, makes in the steel weight percent of each composition as shown in table 3; Above-mentioned reinforcing bar blank is heated to 1200 ℃ insulation 1h; Then, when above-mentioned reinforcing bar blank is cooled to 1050 ℃, the reinforcing bar blank is rolled, finishes rollingly during to 960 ℃, obtain the reinforcing bar that diameter is 40mm; And with above-mentioned reinforcing bar air cooling to 270 ℃--collect the bundling slow cooling in the time of 320 ℃ to room temperature.
In addition, present embodiment has the steel of three kinds of compositions under same technology, is designated as embodiment 1.1,1.2,1.3 respectively.The embodiment performance is as shown in table 4.
Table 3, embodiment of the invention chemical ingredients (wt%)
The mechanical property of table 4, the embodiment of the invention
Embodiment 4
At first, after smelting with conventional process for making, continuous casting becomes steel billet, makes in the steel weight percent of each composition as shown in table 3; Above-mentioned steel billet is heated to 1200 ℃, insulation 1h, when then above-mentioned reinforcing bar blank being cooled to 1050 ℃, the reinforcing bar blank is rolled, finish rolling during to 960 ℃, obtain the reinforcing bar that diameter is 40mm, and with above-mentioned reinforcing bar air cooling to room temperature, then behind the bundling under 240,270,300 ℃ of conditions destressing handle 2h.
Present embodiment has the steel of three kinds of compositions under same technology, corresponding fully among its composition and the embodiment 1 (promptly 1.1 and 2.1 is identical, and the like).The embodiment performance is as shown in table 5, testing method embodiment 1-2.
The mechanical property of table 5, the embodiment of the invention
1-3.HRB1200 the preparation of the high-strength anti-seismic steel bar that level is above
1200 grades of higher level high-strength anti-seismic steel bars of HRB of the present invention, after conventional steel-making smelting, the weight percent of each composition is in the steel:
C：?0.25～0.31wt％
Mn：1.8～3.2wt％
Si：0.5～1.0wt％
Cr：0～1.5wt％
Ti：0～0.04wt％
V：?0～0.04wt％
P：?0～0.02wt％
S：?0～0.01wt％
All the other are Fe.
Embodiment 5
At first, after smelting with conventional process for making, continuous casting becomes steel billet, makes in the steel weight percent of each composition as shown in table 6; Then steel billet is heated to 1150～1250 ℃ insulation 1h.Be rolled when again steel billet being cooled to 950～1050 ℃, finish rollingly during to 900 ℃, obtain the reinforcing bar that diameter is 32mm, then with the reinforcing bar air cooling to room temperature.
Embodiment 6
At first, after smelting with conventional process for making, continuous casting becomes the reinforcing bar blank, makes in the steel weight percent of each composition as shown in table 6; The reinforcing bar blank is heated to 1150～1250 ℃, and insulation 1h is rolled when then the reinforcing bar blank being cooled to 950～1050 ℃, finishes rollingly during to 900 ℃, obtains the reinforcing bar that diameter is 25mm, again with above-mentioned reinforcing bar air cooling to room temperature.
Embodiment 7
At first, after conventional process for making smelting, continuous casting becomes the reinforcing bar blank, make in the steel weight percent of each composition as shown in table 6, the reinforcing bar blank is heated to 1150～1250 ℃, and insulation 1h is rolled when then the reinforcing bar blank being cooled to 950～1050 ℃, finish to about 900 ℃ the time rollingly, obtain the reinforcing bar that diameter is 32mm; Again with above-mentioned reinforcing bar air cooling to the room temperature bundling, and reinforcing bar handled 3 hours 300 ℃ of following destressings.
Embodiment 8
At first, after smelting with conventional process for making, continuous casting becomes the reinforcing bar blank, makes in the steel weight percent of each composition as shown in table 6, above-mentioned reinforcing bar blank is heated to 1150～1250 ℃, insulation 30min, then, when above-mentioned reinforcing bar blank is cooled to 950～1050 ℃, the reinforcing bar blank is rolled, finish to about 900 ℃ the time rollingly, obtain the reinforcing bar that diameter is 32mm, again with above-mentioned reinforcing bar air cooling to room temperature.
Table 6, embodiment of the invention chemical ingredients (wt%)
| Embodiment | C? | Mn? | Si? | Cr? | Ti? | V? |
| 1? | 0.27? | 2.3? | 0.9? | 0? | 0.02? | 0.04? |
| 2? | 0.28? | 2.5? | 0.9? | 0.5? | 0.02? | 0? |
| 3? | 0.31? | 2.8? | 0.8? | 1.0? | 0.02? | 0? |
| 4? | 0.30? | 3.0? | 0.8? | 1.0? | 0.02? | 0.04? |
| 5? | 0.31? | 2.9? | 0.9? | 0? | 0.027? | 0.025? |
By the measuring method that adopts conventional iron and steel intensity, tensile strength etc. reinforcing bar is assessed, the performance perameter of its measurement is referring to table 7.
The mechanical property of table 7, the embodiment of the invention (φ 32mm)
Other performance index of remarks: PSB are all qualified.
Although above the specific embodiment of the present invention has been given to describe in detail and explanation; but should indicatedly be; we can carry out various equivalences to above-mentioned embodiment according to conception of the present invention and change and modification; when the function that it produced does not exceed spiritual that specification sheets contains yet, all should be within protection scope of the present invention.
Claims (12)
1. high-strength anti-seismic steel bar, after smelting with conventional steel-making, continuous casting becomes excellent base, and the weight percent of each composition is in the steel:
C：?0.08～0.15wt％
Mn：1.8～3.2wt％
Si：0.2～1.5wt％
Cr：0～1.0wt％
P：?0～0.02wt％
S：?0～0.01wt％
All the other are Fe,
Rod base high temperature rolling obtains reinforcing bar, slow cooling behind ℃ collection bundling of reinforcing bar air cooling to 200～400, perhaps air cooling obtains high-strength anti-seismic steel bar behind room temperature collection bundling and after 200～400 ℃ of destressings processing, the microstructure of reinforcing bar is the heterogeneous structure of grain boundary allotriomorphic ferrite and granular bainite, its intensity is more than the HRB500 level, and each component is in the reinforcing bar microstructure:
Grain boundary allotriomorphic ferrite--------------10～40%;
Granular bainite----------------------60～90%.
2. high-strength anti-seismic steel bar as claimed in claim 1, the diameter in wherein said reinforcing bar cross section is 25-50mm.
3. high-strength anti-seismic steel bar as claimed in claim 1 or 2, the composition in the wherein said steel is:
C：?0.08～0.15wt％
Mn：1.8～3.2wt％
Si：0.2～1.5wt％
Cr：0.25～0.95wt％
P：?0～0.02wt％
S：?0～0.01wt％
All the other are Fe.
4. as the manufacture method of claim 1-3 high-strength anti-seismic steel bar as described in each, may further comprise the steps:
(1) with after the conventional process for making smelting, continuous casting becomes excellent base, and the weight percent that makes each composition in the steel is such as described in the claim 1-3;
(2) described excellent base is heated to 1200～1250 ℃, be incubated 0.5～2 hour;
When (3) described excellent base being cooled to 1050～1100 ℃, excellent base is rolled, finishes rollingly during to 800～980 ℃, obtain reinforcing bar;
(4) described reinforcing bar air cooling was handled 2～6 hours 200～400 ℃ of destressings to room temperature and with the reinforcing bar behind the air cooling, collected bundling and slow cooling during perhaps with described reinforcing bar air cooling to 200～400 ℃.
5. high-strength anti-seismic steel bar, after smelting with conventional steel-making, continuous casting becomes excellent base, and the weight percent of each composition is in the steel:
C：?0.15～0.30wt％
Mn：1.8～3.2wt％
Si：0.5～1.0wt％
Cr：0.05～1.0wt％
P：?0～0.02wt％
S：?0～0.01wt％
All the other are Fe,
Rod base high temperature rolling obtains reinforcing bar, slow cooling behind ℃ collection bundling of reinforcing bar air cooling to 200～400, perhaps air cooling is handled to room temperature and 200～400 ℃ of destressings and is obtained high-strength anti-seismic steel bar, the microstructure of reinforcing bar is bainite and martensitic heterogeneous structure, its intensity is more than the HRB800 level, and each component is in the reinforcing bar microstructure:
Bainite--------------10～40%;
Martensite---------------60～90%.
6. high-strength anti-seismic steel bar as claimed in claim 5, wherein, the intensity of described reinforcing bar is more than the HRB933.
7. as claim 5 or 6 described high-strength anti-seismic steel bars, wherein, the diameter in described reinforcing bar cross section is 25-50mm.
8. as the manufacture method of each high-strength anti-seismic steel bar of claim 5-7, it is characterized in that this method may further comprise the steps:
(1) with after the conventional process for making smelting, continuous casting becomes excellent base, makes the weight percent of each composition in the steel be:
C：?0.15～0.30wt％
Mn：1.8～3.2wt％
Si：0.5～1.0wt％
Cr：0.1～1.0wt％
P：?0～0.02wt％
S：?0～0.01wt％
All the other are Fe,
(2) above-mentioned reinforcing bar blank is heated to 1200～1250 ℃, be incubated 0.5～2 hour;
When (3) above-mentioned excellent base being cooled to 1050～1100 ℃, excellent base is rolled, finishes rollingly during to 900～980 ℃, obtain bar;
(4) described reinforcing bar air cooling was handled 2～6 hours 200～400 ℃ of destressings to room temperature and with the reinforcing bar behind the air cooling, collected bundling and slow cooling during perhaps with described reinforcing bar air cooling to 200～400 ℃.
9. high-strength anti-seismic steel bar, after smelting with conventional steel-making, continuous casting becomes excellent base, and the weight percent of each composition is in the steel:
C：?0.20～0.35wt％
Mn：1.8～3.2wt％
Si：0.5～1.0wt％
Cr：0～1.5wt％
Ti：0.005～0.04wt％
V：?0～0.04wt％
P：?0～0.02wt％
S：?0～0.01wt％
All the other are Fe,
Rod base high temperature rolling obtains reinforcing bar, slow cooling behind ℃ collection bundling of reinforcing bar air cooling to 200～400, perhaps air cooling is handled to room temperature and 200～400 ℃ of destressings and is obtained high-strength anti-seismic steel bar, the microstructure of reinforcing bar is a bainite, martensitic heterogeneous structure, its intensity is more than the HRB1200 level, and each component is in the reinforcing bar microstructure:
Bainite--------------10～40%;
Martensite---------------60～90%.
10. high-strength anti-seismic steel bar as claimed in claim 9, wherein, the diameter of reinforcing bar is 20-50mm.
11. as claim 9 or 10 described high-strength anti-seismic steel bars, wherein, the composition of described steel is:
C：?0.25～0.31wt％
Mn：1.8～3.2wt％
Si：0.5～1.0wt％
Cr：0.5～1.0wt％
Ti：0.01～0.04wt％
V：?0～0.04wt％
P：?0～0.02wt％
S：?0～0.01wt％
All the other are Fe.
12. the method as claim 9-11 high-strength anti-seismic steel bar as described in each is characterized in that this method may further comprise the steps:
(1) smelt with conventional process for making after, continuous casting becomes excellent base, the weight percent that makes each composition in the steel is for respectively as claim 9-11 described in each;
(2) above-mentioned reinforcing bar blank is heated to 1200～1250 ℃, be incubated 0.5～2 hour;
When (3) above-mentioned excellent base being cooled to 1050～1100 ℃, excellent base is rolled, finishes rollingly during to 900～980 ℃, obtain bar;
(4) described reinforcing bar air cooling was handled 2～6 hours 200～400 ℃ of destressings to room temperature and with the reinforcing bar behind the air cooling, collected bundling and slow cooling during perhaps with described reinforcing bar air cooling to 200～400 ℃.
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| CN104018059A (en) * | 2014-06-25 | 2014-09-03 | 武汉钢铁(集团)公司 | Bainite finished deformed bar with yield strength greater than or equal to 980MPa and production method thereof |
| CN104212961A (en) * | 2014-08-27 | 2014-12-17 | 河北钢铁股份有限公司承德分公司 | Tempering heat treatment method of Mn-series high-strength finish rolling thread reinforcing steel bars |
| CN104213032A (en) * | 2014-08-25 | 2014-12-17 | 河北钢铁股份有限公司承德分公司 | Production method of 830 MPa grade bainite high-strength finish-rolling reinforcement steel |
| CN106350747A (en) * | 2016-08-31 | 2017-01-25 | 广西盛隆冶金有限公司 | High-strength anti-seismic anti-corrosive steel bar and manufacturing method thereof |
| CN106967928A (en) * | 2017-03-22 | 2017-07-21 | 北京交通大学 | A kind of 650MPa grade high-strengths anti-seismic steel bar steel and preparation method thereof |
| CN110564942A (en) * | 2019-09-16 | 2019-12-13 | 江苏沙钢集团有限公司 | Artificial aging treatment method for high-strength anti-seismic reinforcing steel bar of 630Mpa or above |
| CN113174529A (en) * | 2021-03-17 | 2021-07-27 | 河钢股份有限公司承德分公司 | 830 MPa-grade finish rolled steel bar and production method thereof |
| CN115522140A (en) * | 2022-09-24 | 2022-12-27 | 本溪北营钢铁（集团）股份有限公司 | High-strength anti-seismic steel bar and preparation method thereof |
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| CN1288971A (en) * | 2000-09-08 | 2001-03-28 | 清华大学 | Heterogeneous low-carbon air-cooled granular bainite/crystalloid ferrite steel |
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| CN1288971A (en) * | 2000-09-08 | 2001-03-28 | 清华大学 | Heterogeneous low-carbon air-cooled granular bainite/crystalloid ferrite steel |
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| 《钢铁研究学报》 20050815 杨福宝等 具有仿晶界型铁素体/粒状贝氏体复相组织的大截面钢筋 68-71 1-4 第17卷, 第04期 2 * |
Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104018059A (en) * | 2014-06-25 | 2014-09-03 | 武汉钢铁(集团)公司 | Bainite finished deformed bar with yield strength greater than or equal to 980MPa and production method thereof |
| CN104213032A (en) * | 2014-08-25 | 2014-12-17 | 河北钢铁股份有限公司承德分公司 | Production method of 830 MPa grade bainite high-strength finish-rolling reinforcement steel |
| CN104213032B (en) * | 2014-08-25 | 2015-10-21 | 河北钢铁股份有限公司承德分公司 | The production method of 830MPa level bainite high-strength finish rolling reinforcing bar |
| CN104212961A (en) * | 2014-08-27 | 2014-12-17 | 河北钢铁股份有限公司承德分公司 | Tempering heat treatment method of Mn-series high-strength finish rolling thread reinforcing steel bars |
| CN104212961B (en) * | 2014-08-27 | 2015-10-21 | 河北钢铁股份有限公司承德分公司 | The temper tempering heat treatment method of the high-strength finish rolling deformed bar of Mn system |
| CN106350747A (en) * | 2016-08-31 | 2017-01-25 | 广西盛隆冶金有限公司 | High-strength anti-seismic anti-corrosive steel bar and manufacturing method thereof |
| CN106967928A (en) * | 2017-03-22 | 2017-07-21 | 北京交通大学 | A kind of 650MPa grade high-strengths anti-seismic steel bar steel and preparation method thereof |
| CN110564942A (en) * | 2019-09-16 | 2019-12-13 | 江苏沙钢集团有限公司 | Artificial aging treatment method for high-strength anti-seismic reinforcing steel bar of 630Mpa or above |
| CN110564942B (en) * | 2019-09-16 | 2021-01-12 | 江苏沙钢集团有限公司 | Artificial aging treatment method for high-strength anti-seismic reinforcing steel bar of 630Mpa or above |
| CN113174529A (en) * | 2021-03-17 | 2021-07-27 | 河钢股份有限公司承德分公司 | 830 MPa-grade finish rolled steel bar and production method thereof |
| CN115522140A (en) * | 2022-09-24 | 2022-12-27 | 本溪北营钢铁（集团）股份有限公司 | High-strength anti-seismic steel bar and preparation method thereof |
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| CN101988172B (en) | 2012-07-04 |
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