CN117230371A - Low-temperature-resistant weather-resistant earthquake-resistant hot rolled H-shaped steel for extremely cold environment building structure and manufacturing method thereof - Google Patents
Low-temperature-resistant weather-resistant earthquake-resistant hot rolled H-shaped steel for extremely cold environment building structure and manufacturing method thereof Download PDFInfo
- Publication number
- CN117230371A CN117230371A CN202311187196.5A CN202311187196A CN117230371A CN 117230371 A CN117230371 A CN 117230371A CN 202311187196 A CN202311187196 A CN 202311187196A CN 117230371 A CN117230371 A CN 117230371A
- Authority
- CN
- China
- Prior art keywords
- resistant
- temperature
- equal
- hot rolled
- building structure
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 229910000831 Steel Inorganic materials 0.000 title claims abstract description 39
- 239000010959 steel Substances 0.000 title claims abstract description 39
- 238000004519 manufacturing process Methods 0.000 title claims description 8
- 239000012535 impurity Substances 0.000 claims abstract description 13
- 239000000126 substance Substances 0.000 claims abstract description 13
- 238000000034 method Methods 0.000 claims abstract description 10
- 230000008569 process Effects 0.000 claims abstract description 7
- 238000005096 rolling process Methods 0.000 claims description 23
- 239000002893 slag Substances 0.000 claims description 21
- 238000007664 blowing Methods 0.000 claims description 20
- XKRFYHLGVUSROY-UHFFFAOYSA-N Argon Chemical compound [Ar] XKRFYHLGVUSROY-UHFFFAOYSA-N 0.000 claims description 18
- 238000010079 rubber tapping Methods 0.000 claims description 18
- 238000001816 cooling Methods 0.000 claims description 17
- 238000010438 heat treatment Methods 0.000 claims description 16
- XEEYBQQBJWHFJM-UHFFFAOYSA-N iron Substances [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims description 14
- 229910052799 carbon Inorganic materials 0.000 claims description 13
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 12
- 239000000463 material Substances 0.000 claims description 12
- 238000007670 refining Methods 0.000 claims description 11
- 238000003723 Smelting Methods 0.000 claims description 10
- 229910052786 argon Inorganic materials 0.000 claims description 9
- 238000005260 corrosion Methods 0.000 claims description 8
- 230000007797 corrosion Effects 0.000 claims description 8
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims description 6
- 229910052782 aluminium Inorganic materials 0.000 claims description 6
- 239000002245 particle Substances 0.000 claims description 5
- OYPRJOBELJOOCE-UHFFFAOYSA-N Calcium Chemical compound [Ca] OYPRJOBELJOOCE-UHFFFAOYSA-N 0.000 claims description 4
- CYUOWZRAOZFACA-UHFFFAOYSA-N aluminum iron Chemical compound [Al].[Fe] CYUOWZRAOZFACA-UHFFFAOYSA-N 0.000 claims description 4
- 229910052791 calcium Inorganic materials 0.000 claims description 4
- 239000011575 calcium Substances 0.000 claims description 4
- 238000005266 casting Methods 0.000 claims description 4
- 238000009749 continuous casting Methods 0.000 claims description 4
- 239000007788 liquid Substances 0.000 claims description 4
- 235000008733 Citrus aurantifolia Nutrition 0.000 claims description 3
- 235000011941 Tilia x europaea Nutrition 0.000 claims description 3
- 229910001570 bauxite Inorganic materials 0.000 claims description 3
- 239000010459 dolomite Substances 0.000 claims description 3
- 229910000514 dolomite Inorganic materials 0.000 claims description 3
- 239000004571 lime Substances 0.000 claims description 3
- 230000009467 reduction Effects 0.000 claims description 3
- 238000002791 soaking Methods 0.000 claims description 3
- 238000003892 spreading Methods 0.000 claims description 2
- 230000007480 spreading Effects 0.000 claims description 2
- 238000003756 stirring Methods 0.000 claims description 2
- PXHVJJICTQNCMI-UHFFFAOYSA-N nickel Substances [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 description 14
- 239000010949 copper Substances 0.000 description 12
- 239000011572 manganese Substances 0.000 description 7
- 229910052802 copper Inorganic materials 0.000 description 5
- 229910052759 nickel Inorganic materials 0.000 description 5
- 238000011161 development Methods 0.000 description 4
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 2
- 229910000746 Structural steel Inorganic materials 0.000 description 2
- NCJRLCWABWKAGX-UHFFFAOYSA-N [Si].[Ca].[Ba] Chemical compound [Si].[Ca].[Ba] NCJRLCWABWKAGX-UHFFFAOYSA-N 0.000 description 2
- 239000000843 powder Substances 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- 229910000604 Ferrochrome Inorganic materials 0.000 description 1
- 230000002159 abnormal effect Effects 0.000 description 1
- 239000010425 asbestos Substances 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000000903 blocking effect Effects 0.000 description 1
- 238000009529 body temperature measurement Methods 0.000 description 1
- 229910052804 chromium Inorganic materials 0.000 description 1
- 230000001276 controlling effect Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005189 flocculation Methods 0.000 description 1
- 230000016615 flocculation Effects 0.000 description 1
- 238000007654 immersion Methods 0.000 description 1
- 238000003780 insertion Methods 0.000 description 1
- 230000037431 insertion Effects 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- XWHPIFXRKKHEKR-UHFFFAOYSA-N iron silicon Chemical compound [Si].[Fe] XWHPIFXRKKHEKR-UHFFFAOYSA-N 0.000 description 1
- PYLLWONICXJARP-UHFFFAOYSA-N manganese silicon Chemical compound [Si].[Mn] PYLLWONICXJARP-UHFFFAOYSA-N 0.000 description 1
- 238000002844 melting Methods 0.000 description 1
- 230000008018 melting Effects 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000000737 periodic effect Effects 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 229910052895 riebeckite Inorganic materials 0.000 description 1
- 238000005070 sampling Methods 0.000 description 1
- 229910052710 silicon Inorganic materials 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
Landscapes
- Heat Treatment Of Steel (AREA)
Abstract
The invention discloses low-temperature-resistant weather-resistant earthquake-resistant hot rolled H-shaped steel for an extremely cold environment building structure, which comprises the following chemical components in percentage by mass: 0.06% -0.14% of C, 0.35% -0.45% of S i, 1.30% -1.40% of Mn, less than or equal to 0.020% of P, less than or equal to 0.015% of S, 0.08% -0.14% of V, 0.25% -0.40% of Cr, 0.25% -0.35% of N i, 0.25% -0.35% of Cu, 0.008% -0.0150% of N, and the balance of Fe and impurities, wherein the mass fraction is 100% in total. Its preparing process is also disclosed. The yield strength ReL of the H-shaped steel prepared by the method is more than or equal to 460MPa, the tensile strength Rm is more than or equal to 580MPa, the yield ratio is less than or equal to 0.80, the impact toughness at minus 60 ℃ is more than or equal to 85J, and the elongation after fracture is more than or equal to 28%.
Description
Technical Field
The invention relates to the technical field of smelting, in particular to low-temperature-resistant weather-resistant earthquake-resistant hot rolled H-shaped steel for an extremely cold environment building structure and a manufacturing method thereof.
Background
The number and development of steel structure buildings are usually related to the development degree of countries or regions, and since the national major iron and steel countries, the steel structure buildings in the economically developed regions of China are gradually increased. At present, china has entered a rapid urban period, and needs structural steel support from large to small public buildings to civilian residences, so that the demand of China for structural steel is only increased or not reduced. In particular, in recent years, with the rise of large-span bridges and super high-rise buildings, the performance requirements for building steels are further improved.
At present, the main materials of the H-shaped steel in China are Q235B and Q355B, the variety and the performance are relatively single, the development needs of the steel structure building industry in China cannot be met, and the development of the high-quality hot-rolled H-shaped steel with special performance is urgent.
Disclosure of Invention
In order to solve the technical problems, the invention aims to provide low-temperature-resistant weather-resistant earthquake-resistant hot rolled H-shaped steel for an extremely cold environment building structure and a manufacturing method thereof.
In order to solve the technical problems, the invention adopts the following technical scheme:
the invention relates to low-temperature-resistant weather-resistant earthquake-resistant hot rolled H-shaped steel for an extremely cold environment building structure, which comprises the following chemical components in percentage by mass: 0.06% -0.14% of C, 0.35% -0.45% of Si, 1.30% -1.40% of Mn, less than or equal to 0.020% of P, less than or equal to 0.015% of S, 0.08% -0.14% of V, 0.25% -0.40% of Cr, 0.25% -0.35% of Ni, 0.25% -0.35% of Cu, 0.008% -0.0150% of N and the balance of Fe and impurities, wherein the mass fraction is 100% in total.
Further, the carbon equivalent CEN is less than or equal to 0.36 percent, and the atmospheric corrosion resistance index I is more than or equal to 6.0.
Further, the chemical components of the material comprise the following components in percentage by mass: 0.09% of C, 0.35% of Si, 1.33% of Mn, 0.018% of P, 0.006% of S, 0.09% of V, 0.35% of Cr, 0.31% of Ni, 0.30% of Cu, 0.009% of N and the balance of Fe and impurities, wherein the mass fraction is 100% in total.
Further, the chemical components of the material comprise the following components in percentage by mass: 0.08% of C, 0.40% of Si, 1.40% of Mn, 0.011% of P, 0.010% of S, 0.14% of V, 0.25% of Cr, 0.35% of Ni, 0.35% of Cu, 0.012% of N, and the balance of Fe and impurities, wherein the mass fraction is 100% in total.
Further, the chemical components of the material comprise the following components in percentage by mass: 0.14% of C, 0.36% of Si, 1.30% of Mn, 0.015% of P, 0.005% of S, 0.08% of V, 0.45% of Cr, 0.25% of Ni, 0.29% of Cu, 0.015% of N, and the balance of Fe and impurities, wherein the mass fraction is 100% in total.
Further, the chemical components of the material comprise the following components in percentage by mass: 0.12% of C, 0.45% of Si, 1.35% of Mn, 0.020% of P, 0.015% of S, 0.12% of V, 0.30% of Cr, 0.29% of Ni, 0.25% of Cu, 0.008% of N and the balance of Fe and impurities, wherein the mass fraction is 100% in total.
A manufacturing method of low-temperature-resistant weather-resistant earthquake-resistant hot rolled H-shaped steel for an extremely cold environment building structure comprises the following steps:
the smelting process comprises the following steps: smelting in a converter, LF refining and continuous casting of special-shaped blanks;
smelting in a combined blowing converter, wherein the converter adopts high-pulling and supplementary blowing operation, deep gun and large flow are required during point blowing, tapping carbon components after point blowing once are required to have tapping requirements, and the end point control target is that: c is 0.04-0.06%, T is more than or equal to 1610 ℃; adding 200-300kg of dolomite thick slag before tapping, stopping slag and tapping, wherein the target P is less than or equal to 0.015%; argon blowing operation is carried out according to the specification; stirring large argon in the early stage of tapping, and reducing the argon flow to perform slag stopping operation when the tapping amount is more than 2/3;
adding 30kg of aluminum iron when refining and heating in place, or spreading 10-20kg of aluminum particles on the liquid surface of the ladle; adding 0.5kg/t-1.5kg/t bauxite and 4kg/t-6kg/t lime into the slag material in the heating process; feeding the calcium wire by 80-150 m, wherein the argon flow is moderate when feeding the wire, and feeding the wire at a speed of 1.5-2 m/s under the condition that the calcium wire does not spiral; the soft blowing time of refining each furnace steel is required to be kept for 15 minutes, molten steel cannot be exposed during soft blowing, and steel slag has creeping; refining to control proper steel feeding temperature, and controlling the superheat degree to be less than or equal to 30 ℃;
the whole process adopts protection casting, the superheat degree is 20-30 ℃, the secondary cooling adopts an intercooling system, the constant pulling speed operation is adopted, and the BB1 section pulling speed is controlled to be 1.1+/-0.1 m/min; BB2 pulling speed is controlled to be 0.8+/-0.1 m/min;
the rolling process comprises the following steps: step heating furnace, BD cogging, CCS universal rolling and step cooling bed cooling;
the temperature of the preheating section is less than or equal to 900 ℃, the temperature of the heating section I is 1120-1220 ℃, the temperature of the heating section II is 1200-1330 ℃, the temperature of the soaking section is 1180-1300 ℃, the tapping temperature is more than or equal to 1180 ℃, and the furnace time is 150-210 min;
BD1 cogging, the initial rolling temperature is more than or equal to 1150 ℃, rolling passes are formulated according to the final specification of the product, and the total rolling reduction is more than or equal to 50%;
CCS universal rolling, wherein the temperature of the last final rolling pass is controlled at 900-930 ℃;
and naturally cooling the cooling bed, and straightening at the temperature below 100 ℃.
Compared with the prior art, the invention has the beneficial technical effects that:
the yield strength ReL of the prepared H-shaped steel is more than or equal to 460MPa, the tensile strength Rm is more than or equal to 580MPa, the yield ratio is less than or equal to 0.80, the impact toughness at minus 60 ℃ is more than or equal to 85J, and the elongation after fracture is more than or equal to 28%.
Drawings
The invention is further described with reference to the following description of the drawings.
FIG. 1 is a microstructure diagram of low-temperature-resistant weather-resistant earthquake-resistant hot rolled H-shaped steel for an extremely cold environment building structure, wherein the microstructure is F+P.
Detailed Description
The present invention will be described in further detail below
A manufacturing method of low-temperature-resistant weather-resistant earthquake-resistant hot rolled H-shaped steel for an extremely cold environment building structure comprises the following chemical components in percentage by mass: 0.06% -0.14% of C, 0.35% -0.45% of Si, 1.30% -1.40% of Mn, less than or equal to 0.020% of P, less than or equal to 0.015% of S, 0.08% -0.14% of V, 0.25% -0.40% of Cr, 0.25% -0.35% of Ni, 0.25% -0.35% of Cu, 0.008% -0.0150% of N and the balance of Fe and impurities, wherein the mass fraction is 100% in total; the carbon equivalent CEN is less than or equal to 0.36 percent, and the atmospheric corrosion resistance index I is more than or equal to 6.0.
The smelting process comprises the following steps: converter smelting, LF refining and beam blank continuous casting.
The combined blown converter is used for smelting, the converter adopts high stretch-fill blowing operation (carbon is pulled to be more than or equal to 0.10 and less than or equal to 0.20), deep gun and large flow are required during point blowing (the flow is regulated to be more than 20000m < 3 >/h after point blowing for 1 minute), the tapping carbon component is required to have tapping requirement after point blowing once, and the end point control target is that: c is more than or equal to 0.06%, T is more than or equal to 1600 ℃, 200-300kg of dolomite thick slag is added before tapping, slag blocking is performed, and the target P is less than or equal to 0.020%. The copper and nickel plates are added into the furnace along with the scrap steel, and can be adjusted according to the content of the carbon sample copper and nickel, 1600kg of silicon manganese, 100kg of silicon iron, 400kg of low-carbon ferrochrome and 50kg of aluminum iron (80%) are added into each furnace, so that the component incoming line rate is ensured.
30kg of aluminum iron is added when refining is in place and heating is carried out, or 10-20kg of aluminum particles are spread on the liquid surface of the ladle when heating is carried out. Adding 0.5kg/t-1.5kg/t bauxite and 4kg/t-6kg/t lime in the heating process, adhering slag before temperature measurement and sampling, observing the color of steel slag, stopping adding aluminum particles when the color of the steel slag is light green or white slag, deoxidizing by adopting silicon calcium barium, and continuously adding aluminum particles to prepare white slag if the color of the steel slag is brown or black slag, wherein the white slag is silicon calcium barium, and preventing flocculation flow without aluminum deoxidization in the later period. The feeding speed of the line is 2m/s, and the feeding speed of the line is 80-150 m. The soft blowing time of refining each furnace steel is more than or equal to 15 minutes.
The components of the continuous casting molten steel are C0.06% -0.14%, si 0.35% -0.45%, mn1.30% -1.40%, P less than or equal to 0.020%, S less than or equal to 0.015%, V0.08% -0.14%, cr 0.25% -0.40%, ni0.25% -0.35%, cu0.25% -0.35%, N0.008% -0.0150%, and the balance of Fe and impurities, wherein the mass fraction is 100% in total; the carbon equivalent CEN is less than or equal to 0.36 percent, and the atmospheric corrosion resistance index I is more than or equal to 6.0.
The calculation formula of the carbon equivalent is
CEN＝C+A(C){Si/24+Mn/16+Cu/15+Ni/20+(Cr+Mo+V+Nb)/5+5B}。
The atmospheric corrosion resistance index I is calculated as
I＝26.01(％Cu)+3.88(％Ni)+1.20(％Cr)+1.49(％Si)+17.28(％P)-7.29(％Cu)(％Ni)-9.10(％Ni)(％P)-33.39(％Cu) 2 。
The whole process adopts protection pouring, the argon blowing control of a large ladle long nozzle, the asbestos bowl is used for a water outlet, the superheat degree is 25-35 ℃, an intercooling water meter is used for secondary cooling, the fluctuation of liquid level is controlled within +/-3 mm, a lower slide block of 26mm is adopted, the automatic control of a stopper rod is adopted, the insertion depth of the nozzle is 65mm, and the melting point of casting powder is the same as that of the casting powder: 1235 ℃, density: 0.85-0.90g/ml, viscosity: 7.85Poise, the thickness of the covering slag is controlled to be 30-45mm, and the pulling speed is ensured to be constant in the production process.
The method is suitable for the section of the special-shaped blank of 350X 290X 100mm (BB 1), 555X 440X 105mm (BB 2), 730X 370X 905mm (BB 3) and 1024X 390X 120mm (BB 4).
And slowly cooling the special-shaped blank for 48 hours after the special-shaped blank is off line.
The rolling process comprises the following steps: step heating furnace, BD cogging, CCS universal rolling and step cooling bed cooling.
The preheating section temperature is less than or equal to 900 ℃, the heating section temperature is less than or equal to 1200 ℃, the heating section temperature is 1150-1300 ℃, the soaking section temperature is 1230-1300 ℃, and the tapping temperature is 1200-1260 ℃. The furnace time is 150min-210min.
And cogging BD1, wherein the initial rolling temperature is more than or equal to 1180 ℃, and the rolling pass is formulated according to the final specification of the product, and the total rolling reduction is more than or equal to 50%.
CCS universal rolling, and the final pass temperature of final rolling is controlled below 900 ℃.
The cooling bed adopts permanent close-packed natural cooling to avoid abnormal tissue caused by too high cooling speed, and straightening and sawing are carried out after the temperature of the finished product is lower than 100 ℃.
Table 1 chemical composition of examples
Table 2 carbon equivalent and corrosion resistance index for each example
| Examples | Carbon equivalent/% | Index of resistance to atmospheric corrosion I |
| Example 1 | 0.23 | 6.75 |
| Example 2 | 0.21 | 6.53 |
| Example 3 | 0.34 | 6.62 |
| Example 4 | 0.28 | 6.34 |
TABLE 3 initial and final rolling temperatures for each example
| Examples | Initial rolling temperature (. Degree. C.) | Finishing temperature (. Degree. C.) |
| Example 1 | 1195 | 887 |
| Example 2 | 1180 | 892 |
| Example 3 | 1185 | 900 |
| Example 4 | 1198 | 891 |
TABLE 4 mechanical Properties of examples
TABLE 5 periodic immersion Corrosion test results for examples
The above embodiments are only illustrative of the preferred embodiments of the present invention and are not intended to limit the scope of the present invention, and various modifications and improvements made by those skilled in the art to the technical solutions of the present invention should fall within the protection scope defined by the claims of the present invention without departing from the design spirit of the present invention.
Claims (7)
1. The utility model provides an extremely cold environment building structure is with resistant low temperature resistant antidetonation hot rolled H shaped steel of waiting which characterized in that: the chemical components of the material comprise the following components in percentage by mass: 0.06% -0.14% of C, 0.35% -0.45% of Si, 1.30% -1.40% of Mn, less than or equal to 0.020% of P, less than or equal to 0.015% of S, 0.08% -0.14% of V, 0.25% -0.40% of Cr, 0.25% -0.35% of Ni, 0.25% -0.35% of Cu, 0.008% -0.0150% of N and the balance of Fe and impurities, wherein the mass fraction is 100% in total.
2. The low-temperature-resistant weather-resistant earthquake-resistant hot rolled H-section steel for an extremely cold environment building structure according to claim 1, wherein: the carbon equivalent CEN is less than or equal to 0.36 percent, and the atmospheric corrosion resistance index I is more than or equal to 6.0.
3. The low-temperature-resistant weather-resistant earthquake-resistant hot rolled H-section steel for an extremely cold environment building structure according to claim 1, wherein: the chemical components of the material comprise the following components in percentage by mass: 0.09% of C, 0.35% of Si, 1.33% of Mn, 0.018% of P, 0.006% of S, 0.09% of V, 0.35% of Cr, 0.31% of Ni, 0.30% of Cu, 0.009% of N and the balance of Fe and impurities, wherein the mass fraction is 100% in total.
4. The low-temperature-resistant weather-resistant earthquake-resistant hot rolled H-section steel for an extremely cold environment building structure according to claim 1, wherein: the chemical components of the material comprise the following components in percentage by mass: 0.08% of C, 0.40% of Si, 1.40% of Mn, 0.011% of P, 0.010% of S, 0.14% of V, 0.25% of Cr, 0.35% of Ni, 0.35% of Cu, 0.012% of N, and the balance of Fe and impurities, wherein the mass fraction is 100% in total.
5. The low-temperature-resistant weather-resistant earthquake-resistant hot rolled H-section steel for an extremely cold environment building structure according to claim 1, wherein: the chemical components of the material comprise the following components in percentage by mass: 0.14% of C, 0.36% of Si, 1.30% of Mn, 0.015% of P, 0.005% of S, 0.08% of V, 0.45% of Cr, 0.25% of Ni, 0.29% of Cu, 0.015% of N, and the balance of Fe and impurities, wherein the mass fraction is 100% in total.
6. The low-temperature-resistant weather-resistant earthquake-resistant hot rolled H-section steel for an extremely cold environment building structure according to claim 1, wherein: the chemical components of the material comprise the following components in percentage by mass: 0.12% of C, 0.45% of Si, 1.35% of Mn, 0.020% of P, 0.015% of S, 0.12% of V, 0.30% of Cr, 0.29% of Ni, 0.25% of Cu, 0.008% of N and the balance of Fe and impurities, wherein the mass fraction is 100% in total.
7. The method for manufacturing the low-temperature-resistant weather-resistant earthquake-resistant hot rolled H-section steel for an extremely cold environment building structure according to any one of claims 1 to 6, characterized by: comprising the following steps:
the smelting process comprises the following steps: smelting in a converter, LF refining and continuous casting of special-shaped blanks;
smelting in a combined blowing converter, wherein the converter adopts high-pulling and supplementary blowing operation, deep gun and large flow are required during point blowing, tapping carbon components after point blowing once are required to have tapping requirements, and the end point control target is that: c is 0.04-0.06%, T is more than or equal to 1610 ℃; adding 200-300kg of dolomite thick slag before tapping, stopping slag and tapping, wherein the target P is less than or equal to 0.015%; argon blowing operation is carried out according to the specification; stirring large argon in the early stage of tapping, and reducing the argon flow to perform slag stopping operation when the tapping amount is more than 2/3;
adding 30kg of aluminum iron when refining and heating in place, or spreading 10-20kg of aluminum particles on the liquid surface of the ladle; adding 0.5kg/t-1.5kg/t bauxite and 4kg/t-6kg/t lime into the slag material in the heating process; feeding the calcium wire by 80-150 m, wherein the argon flow is moderate when feeding the wire, and feeding the wire at a speed of 1.5-2 m/s under the condition that the calcium wire does not spiral; the soft blowing time of refining each furnace steel is required to be kept for 15 minutes, molten steel cannot be exposed during soft blowing, and steel slag has creeping; refining to control proper steel feeding temperature, and controlling the superheat degree to be less than or equal to 30 ℃;
the whole process adopts protection casting, the superheat degree is 20-30 ℃, the secondary cooling adopts an intercooling system, the constant pulling speed operation is adopted, and the BB1 section pulling speed is controlled to be 1.1+/-0.1 m/min; BB2 pulling speed is controlled to be 0.8+/-0.1 m/min;
the rolling process comprises the following steps: step heating furnace, BD cogging, CCS universal rolling and step cooling bed cooling;
the temperature of the preheating section is less than or equal to 900 ℃, the temperature of the heating section I is 1120-1220 ℃, the temperature of the heating section II is 1200-1330 ℃, the temperature of the soaking section is 1180-1300 ℃, the tapping temperature is more than or equal to 1180 ℃, and the furnace time is 150-210 min;
BD1 cogging, the initial rolling temperature is more than or equal to 1150 ℃, rolling passes are formulated according to the final specification of the product, and the total rolling reduction is more than or equal to 50%;
CCS universal rolling, wherein the temperature of the last final rolling pass is controlled at 900-930 ℃;
and naturally cooling the cooling bed, and straightening at the temperature below 100 ℃.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311187196.5A CN117230371A (en) | 2023-09-14 | 2023-09-14 | Low-temperature-resistant weather-resistant earthquake-resistant hot rolled H-shaped steel for extremely cold environment building structure and manufacturing method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311187196.5A CN117230371A (en) | 2023-09-14 | 2023-09-14 | Low-temperature-resistant weather-resistant earthquake-resistant hot rolled H-shaped steel for extremely cold environment building structure and manufacturing method thereof |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN117230371A true CN117230371A (en) | 2023-12-15 |
Family
ID=89087317
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202311187196.5A Pending CN117230371A (en) | 2023-09-14 | 2023-09-14 | Low-temperature-resistant weather-resistant earthquake-resistant hot rolled H-shaped steel for extremely cold environment building structure and manufacturing method thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN117230371A (en) |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101760704A (en) * | 2009-12-24 | 2010-06-30 | 马鞍山钢铁股份有限公司 | Economical high-strength high-weatherability hot-rolled H beam steel containing vanadium and nitrogen and rolling method thereof |
| CN103243272A (en) * | 2013-05-25 | 2013-08-14 | 马钢(集团)控股有限公司 | Rolling process of vanadium-containing weather-resistant hot-rolling H-shaped steel with yield strength of 500 MPa |
| CN108754327A (en) * | 2018-06-15 | 2018-11-06 | 马鞍山钢铁股份有限公司 | A kind of yield strength 460MPa grades of bridge structure high tenacity are weather-resistance hot rolled H-shaped and its production method |
| CN115094308A (en) * | 2022-06-02 | 2022-09-23 | 包头钢铁（集团）有限责任公司 | Micro-alloy-element-free low-cost small-specification Q355B hot-rolled H-shaped steel and production method thereof |
| CN115354222A (en) * | 2022-08-09 | 2022-11-18 | 包头钢铁（集团）有限责任公司 | Thick-specification high-strength weather-resistant anti-seismic H-shaped steel and rolling method thereof |
| CN115725901A (en) * | 2022-11-18 | 2023-03-03 | 包头钢铁（集团）有限责任公司 | Thick-specification high-strength weather-resistant anti-seismic hot-rolled H-shaped steel for building steel structure |
| CN116716534A (en) * | 2023-05-15 | 2023-09-08 | 包头钢铁（集团）有限责任公司 | Manufacturing method of high-strength high-toughness anti-seismic hot rolled H-shaped steel |
-
2023
- 2023-09-14 CN CN202311187196.5A patent/CN117230371A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101760704A (en) * | 2009-12-24 | 2010-06-30 | 马鞍山钢铁股份有限公司 | Economical high-strength high-weatherability hot-rolled H beam steel containing vanadium and nitrogen and rolling method thereof |
| CN103243272A (en) * | 2013-05-25 | 2013-08-14 | 马钢(集团)控股有限公司 | Rolling process of vanadium-containing weather-resistant hot-rolling H-shaped steel with yield strength of 500 MPa |
| CN108754327A (en) * | 2018-06-15 | 2018-11-06 | 马鞍山钢铁股份有限公司 | A kind of yield strength 460MPa grades of bridge structure high tenacity are weather-resistance hot rolled H-shaped and its production method |
| CN115094308A (en) * | 2022-06-02 | 2022-09-23 | 包头钢铁（集团）有限责任公司 | Micro-alloy-element-free low-cost small-specification Q355B hot-rolled H-shaped steel and production method thereof |
| CN115354222A (en) * | 2022-08-09 | 2022-11-18 | 包头钢铁（集团）有限责任公司 | Thick-specification high-strength weather-resistant anti-seismic H-shaped steel and rolling method thereof |
| CN115725901A (en) * | 2022-11-18 | 2023-03-03 | 包头钢铁（集团）有限责任公司 | Thick-specification high-strength weather-resistant anti-seismic hot-rolled H-shaped steel for building steel structure |
| CN116716534A (en) * | 2023-05-15 | 2023-09-08 | 包头钢铁（集团）有限责任公司 | Manufacturing method of high-strength high-toughness anti-seismic hot rolled H-shaped steel |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN104946972B (en) | Steel disc strip for diode lead and production technology of steel disc strip | |
| CN104831183B (en) | A kind of 1080MPa grade high-strength corrosion-resistant prestressed structure spiral and preparation method | |
| WO2018001043A1 (en) | Improved 09crcusb steel resistant to sulfuric acid dew point corrosion and preparation method therefor | |
| CN110373611B (en) | Ti-containing deformed steel bar and preparation method thereof | |
| CN101892432A (en) | Manufacturing method of X70QS seamless line pipe for acid environment | |
| CN115094308B (en) | Microalloy element-free low-cost small-specification Q355B hot rolled H-shaped steel and production method thereof | |
| CN109082601A (en) | A kind of acid-resisting corrosion X70MS line steel hot rolling roll bending and its manufacturing method | |
| CN109023041A (en) | 400MPa grades of antidetonation anti-chlorine ion corrosion reinforcing bars and its manufacturing method | |
| CN109023042A (en) | 500MPa grades of antidetonation anti-chlorine ion corrosion reinforcing bars and its manufacturing method | |
| CN107620011B (en) | A kind of heat-resistance stainless steel seamless pipe and preparation method thereof | |
| CN116287621B (en) | Double-resistance pipeline steel plate and production method thereof | |
| CN114672605B (en) | Corrosion-resistant steel bar mechanical connection sleeve, wire rod and production method of wire rod | |
| CN115323247A (en) | Production method of hot-rolled H-shaped steel AH32 for ocean engineering structure | |
| CN116716534A (en) | Manufacturing method of high-strength high-toughness anti-seismic hot rolled H-shaped steel | |
| CN115323267A (en) | Weather-resistant hot-rolled H-shaped steel for steel structure and production method thereof | |
| CN113388785B (en) | Acid-resistant pipeline steel plate and preparation method thereof | |
| CN101775552A (en) | High-strength high-flexibility low-yield-ratio fire resistant steel and production method thereof | |
| CN110306103A (en) | A kind of 555MPa grades of anti-H2S corrodes oil pipe steel band and preparation method thereof | |
| CN109881121A (en) | The high-strength anti-seismic steel bar and its production method and purposes of a kind of anti-chlorine ion corrosion | |
| CN109055859A (en) | A kind of industrial robot joint flexbile gear high intensity RL40 steel and preparation method | |
| CN105970084B (en) | A kind of strain clamp and preparation method thereof | |
| CN108411208A (en) | A kind of preparation method of power plants generating electricity unit austenite heat-resistance stainless steel | |
| CN109280734B (en) | Smelting method of medium and high alloy ultra-low phosphorus steel | |
| CN117230371A (en) | Low-temperature-resistant weather-resistant earthquake-resistant hot rolled H-shaped steel for extremely cold environment building structure and manufacturing method thereof | |
| JP7233482B2 (en) | 540 MPa grade high silicon high chromium weathering steel and its manufacturing method |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination |