CN100427630C - Production method of high-strength atmospheric corrosion resistant section steel - Google Patents
Production method of high-strength atmospheric corrosion resistant section steel Download PDFInfo
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- CN100427630C CN100427630C CNB2005100224412A CN200510022441A CN100427630C CN 100427630 C CN100427630 C CN 100427630C CN B2005100224412 A CNB2005100224412 A CN B2005100224412A CN 200510022441 A CN200510022441 A CN 200510022441A CN 100427630 C CN100427630 C CN 100427630C
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- 238000005260 corrosion Methods 0.000 title abstract description 10
- 230000007797 corrosion Effects 0.000 title abstract description 10
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Abstract
The invention provides a production method of high-strength atmospheric corrosion resistant section steel, which comprises the following steps: 1) smelting molten steel, 2) adding a pre-deoxidizer into a steel ladle, then adding an alloy of Si, Mn and Cr and a slag charge, 3) heating the molten steel and blowing argon, adding an alloy of C powder, Si and Mn, stopping heating when the temperature of the molten steel is 1600-1630 ℃, and continuing blowing argon for 15-30 min; or heating the molten steel and blowing argon, stopping heating when the temperature of the molten steel is 1600-1630 ℃, performing vacuum treatment, adding C powder, Si and Mn alloy at the later stage of the vacuum treatment, 4) casting, 5) heating the casting blank to 1100-1250 ℃, preserving heat, rolling the section steel, and cooling after rolling. R of the section Steel of the present inventioneLThe production method of the invention does not need a cold bending process, does not need to control a cooling method after rolling, and only adopts natural cooling.
Description
Technical field
The present invention relates to a kind of shape steel producing method, particularly relate to a kind of production method of high strength atmospheric corrorsion resistant section steel.
Background technology
Development along with China Railway Freight train heavy loading, the manufacturing of railway freight train is developing to the high strength direction with steel always, in order to satisfy the requirement of joist steel in China's heavy haul train, Tiedaobu Transportation Bureau has issued rail freight high-strength weather-resistant hot rolling 310 second font steel technical qualification in 2004, high-strength weather-resistant hot rolling 310 second font steel are proposed yield strength (ReL) be not less than 450MPa, tensile strength (Rm) is not less than 550MPa,-40 ℃ of ballistic works (AkV) are not less than the performance requriements of 24J, require steel to have good weldability and atmospheric corrosion resistance simultaneously.
" steel vanadium titanium " magazine (the 23rd～26 page of the 23rd the 4th phase of volume in December, 2002, the VN12 alloying technology is to 09V steel Effect on Performance, Liu Mingzhu) reported that climbing steel adopts VN12 alloy replacing ferro-vanadiumization, can improve the report of the intensity 30MPa of second font steel." Baogang's science and technology " magazine (the 35th～37 page of the 30th the 4th phase of volume in August, 2004, high weather-proof 310 second font steel trial-production, works such as Cheng Defu) reported that Baogang produces the situation of high weather-proof (atmospheric corrosion resistance) Q345GNHL310 second font steel, the ReL of this steel can reach 420～435MPa, and has good weather resistance." rare earth information " magazine (o. 11th was the 10th page in 2003) has reported that Baogang successfully develops the situation of high-strength weather-resistant B450NbRE310 second font steel, but this magazine is not seen the report that detailed performance index and scale operation information are arranged.The application number of Hankow Steel Mill be 03125344.X public announcement of a patent application a kind ofly be used for the clod wash central sill that rail vehicle is made, adopt the big hat shape steel of the method production yield strength ReL 〉=450MPa of roll formed shape, replace second font steel to make the rail freight central sill.
But no matter adopt VN12 alloy replacing ferro-vanadium production second font steel, or Q345GNHL310 second font steel, ReL does not all reach 450MPa.Adopt the clod wash method to produce big hat shape steel and replace second font steel to make railway freight train central sill, needing increases the clod wash operation, has increased production cost.
Summary of the invention
Technical problem to be solved by this invention provides a kind of production method of high strength atmospheric corrorsion resistant section steel, and the ReL of this steel reaches more than the 450MPa, and Akv and has good atmospheric corrosion resistance ability more than 24J, and this method does not need the clod wash operation.
The technical scheme that technical solution problem of the present invention is adopted is: the production method of high strength atmospheric corrorsion resistant section steel, may further comprise the steps: 1) smelting molten steel, make P in the molten steel≤0.35%, S≤0.15%, V≤0.15%, add Cu plate and Ni plate again, make Cu:0.20 in the molten steel～0.40%, Ni:0.15～0.35%, when C content in the molten steel less than 0.05% the time, tap in the ladle, 2) in ladle, add pre-deoxidant, make that oxygen concn drops to below 0.01% in the molten steel, add Si again, the alloy of Mn and Cr, make Si:0.30 in the molten steel～0.45%, Mn:1.20～1.40%, Cr:0.20～0.40%, add the slag charge that contains Al2O3,3 again) to molten steel heating and Argon, add the C powder, the alloy of Si and Mn, make C:0.10～0.15%, Si:0.30～0.50%, Mn:1.20～1.45%, CEN:0.25～0.34%, after liquid steel temperature is 1600～1630 ℃, stop heating, continue Argon 15～30min; Or to molten steel heating and Argon, after liquid steel temperature is 1600～1630 ℃, stop heating, carry out vacuum-treat, the vacuum-treat later stage adds the C powder, the alloy of Si and Mn, make C:0.10～0.15%, Si:0.30～0.50%, Mn:1.20～1.45%, CEN:0.25～0.34%, 4) casting, temperature is 1548 ± 10 ℃, 5) with the speed of 8～14 ℃/min heating strand to 1100～1250 ℃, be incubated after 1.5～2.0 hours, rolled section steel, finishing temperature is 700～900 ℃, cools off after rolling, obtain high strength atmospheric corrorsion resistant section steel, its Chemical Composition comprises by weight percentage: C:0.10～0.15%, Si:0.30～0.50%, Mn:1.20～1.45%, Cu:0.20～0.40%, Ni:0.15～0.35%, Cr:0.20～0.40%, P≤0.35%, S≤0.15%, V≤0.15%.
The invention has the beneficial effects as follows: the ReL of shaped steel of the present invention reaches more than the 450MPa; Rm reaches more than the 550MPa; AkV is greater than 26J, and the maximum value of carbon equivalent (CEN) is no more than 0.34%, carries out CO2 shielded welding, union-melt weld and manual welding and all crackle can not occur under 0 ℃ of condition.When carrying out corrosion test, shaped steel of the present invention is with respect to corrosion rate≤55% of Q345B (weight percent content of Chemical Composition is: C:0.12～0.18%, Si≤0.40%, Mn:0.12～0.18%, P≤0.030%, S≤0.020%, Cu≤0.070%, Cr≤0.10%, Ni≤0.10%) (degree that occurs below is weight percent content) to adopt TB/T2375-1993 " railway soaks into the corrosion test method with the weathering steel cycle ".Production method of the present invention does not need the clod wash operation, does not need the controlled chilling method after rolling, and only adopts naturally cooling to get final product.
Description of drawings
The 310 second font steel sectional views that Fig. 1 adopts the inventive method to produce.
The clod wash central sill sectional view that Fig. 2 number of patent application 03125344.X produces.
Fig. 3 310 second font steel of the present invention to postwelding again with the welding synoptic diagram of railway freight railway car.
The clod wash central sill that Fig. 4 number of patent application 03125344.X produces and the welding synoptic diagram of railway freight railway car.
Embodiment
The invention will be further described below by drawings and Examples.
C is by increasing the intensity that steel Medium pearlite quantity improves steel, Si, Mn are solid-solubilized in the steel can significantly improve intensity equally, but increase along with C, Si, Mn component in the steel, the toughness and the weldability of steel descend thereupon, so C content is 0.10～0.15%, Si content is 0.30～0.50%, Mn content is 1.20～1.45%.
Add Cu, Ni and Cr element and can improve the atmospheric corrosion resistance ability of steel, but these elements also can reduce the toughness and the weldability of steel, therefore, Cu content is 0.20～0.40%, Ni content is 0.15～0.35%, Cr content is 0.20～0.40%.
P also can improve the atmospheric corrosion resistance ability of steel, but P can improve the low temperature brittleness transition temperature again, is unfavorable for the low temperature impact properties of steel, so P content is not more than 0.35%.
Except that free-cutting steel, S is a harmful element, and is low more good more, so S content of the present invention is not more than 0.15%.
V can form V (C, N) particle, and part of V (C, N) particle becomes the ferrite core, promotes the ferritic generation of intracrystalline, makes the crystal grain of steel obtain refinement, and the add-on of V is not more than 0.15%.
CEN is the carbon equivalent of steel, and CEN is higher than at 0.34% o'clock, and the weldability of steel is poor, and CEN is lower than at 0.25% o'clock, and steel interalloy constituent content is low, and the yield strength of steel decreases.
CEN is calculated as follows:
CEN＝C+A(C){Si/24+Mn/16+Cu/15+Ni/20+(Cr+V)/5}
A in the formula (C) is the proper-use factor of C, A (C)=0.75+0.25tgh[20 (C-0.12)].
The method that the present invention produces high strength atmospheric corrorsion resistant section steel is:
(1) the molten steel converter is just refined
The control of first refining phase of molten steel converter is difficult for the content of element Cu, Ni, Cr of oxidation in the scope that the final finished steel requires, and the content of Si, Mn is lower slightly than the scope of final finished steel, to prevent subsequent process the possibility that increases Si, Mn content is arranged.
1) the converter smelting molten steel makes P in the steel≤0.35%, S≤0.15%, V≤0.15%, 5min added Cu and Ni plate before converter smelting finished, make the content of Cu in the molten steel, Ni be respectively 0.20～0.40% and 0.15～0.35%, when C content in the molten steel less than 0.05% the time, in the ladle of tapping immediately.
2) tapping 1/3 back adds pre-deoxidant, and such as Al piece or Fe-Al-Mn alloy etc., add-on drops to below 0.01% with the oxygen concn in the molten steel and is as the criterion.After adding pre-deoxidant, add Si alloy (Fe-Si alloy or Fe-Si-Mn alloy), Mn alloy (Fe-Mn alloy or Fe-Si-Mn alloy) and Cr alloy (middle carbon Fe-Cr alloy, low-carbon (LC) Fe-Cr alloy, little carbon Fe-Cr alloy or Metal Cr) again, carry out alloying, Si content is 0.30～0.45% in the control molten steel, Mn content is 1.20～1.40%, Cr content is 0.20～0.40%.Tap and added all pre-deoxidants and alloy at 2/3 o'clock.
3) gone out in ladle, to add behind the steel and contained Al
2O
3Slag charge so that the Al of ladle slag
2O
3In 12～26% scope, the purpose that adds slag charge is in order to adsorb the impurity in the ladle.
(2) liquid steel refining
Adopt " electric heater unit " or " electrically heated+vacuum treatment installation " all can carry out the refining of molten steel.Liquid steel refining phase major control C, Si, Mn and CEN remove the SiO in the molten steel in the scope that the final finished steel requires
2, CaO, Al
2O
3Deng being mingled with, increase the purity of molten steel, improve the final performance of steel.
1) adopt electrical heating process:
Molten steel is after the electrically heated operation, begin Argon and heating immediately, and add C powder and Si, Mn alloy, the Argon intensity control is in 0.2～0.4MPa scope, when liquid steel temperature reaches 1600～1630 ℃, stop heating, stop to continue Argon 15～30min after the heating, during electrically heated, electrically heated after 5 minutes ladle slag can all melt, the ladle slag of fusing has the SiO of absorption in the steel
2, CaO, Al
2O
3Deng the ability that is mingled with.Control C, Si and Mn content during the electrically heated respectively in 0.10～0.15%, 0.30～0.50% and 1.20～1.45% scope, CEN is controlled in 0.25～0.34% the scope.Carry out Ca in the electrically heated operation later stage and handle, the purpose that Ca handles is that sulfide is carried out spheroidizing, reduces the rating level of impurity, and the add-on of Ca is steel 0.1～0.3kg per ton.
2) adopt electrically heated+vacuum-treat operation:
Molten steel begins Argon and heating immediately after the electrically heated operation, the Argon intensity control is in 0.2～0.4MPa scope, and liquid steel temperature stops heating when reaching in 1600～1630 ℃ of scopes, send molten steel to carry out vacuum-treat to vacuum treatment installation.When adopting RH vacuum cycle treatment unit to handle molten steel, vacuum degree control is being not more than 12Kpa, and when adopting the VD vacuum treatment installation to handle molten steel, vacuum degree control is being not more than 10KPa.The molten steel vacuum processing time is controlled at 10～15min.Need add C powder and Si, Mn alloy in right amount in the vacuum-treat later stage, control C, Si and Mn content are respectively in 0.10～0.15%, 0.30～0.50% and 1.20～1.45% scope, and CEN is controlled in 0.25～0.34% the scope.After vacuum-treat is intact, carries out Ca and handle, the add-on of Ca is steel 0.1～0.3kg per ton.
(3) continuous casting steel machine
High-strength weather resisting steel liquidus temperature of the present invention is 1518 ℃, and the superheating temperature of wrapping in the control continuous caster is 30 ± 10 ℃, and therefore, the bag temperature is 1548 ± 10 ℃ in the control continuous caster.This temperature realizes by control electrically heated temperature.
(4) section rolling
Strand with the rate of heating heating of 8～14 ℃/min, after being heated to 1100～1250 ℃, is incubated 1.5～2.0 hours under this temperature in process furnace, finishing temperature is controlled at 700～900 ℃, can adopt the air cooling mode to cool off after rolling.
Fig. 1 is the hot rolling 310 second font steel of producing according to the inventive method 2,1 welding of itself and railway freight railway car as shown in Figure 3, because of the exterior angle of 310 second font steel 2 is the right angle, when connecing with railway carriage or compartment, compartment back welding, be the welding of plane and planar, can not occur the phenomenon of rosin joint in the welding process.
Fig. 2 is the clod wash central sill of producing according to number of patent application 03125344.X disclosed method 3, and the welding of itself and railway freight railway car 1 as shown in Figure 4.Because of clod wash central sill 3 exterior angles are big fillet, when connecing, be the welding of arc and planar with railway carriage or compartment, compartment back welding, the phenomenon of rosin joint may appear in welding process.
The clod wash central sill of producing according to the 310 second font steel and the number of patent application 03125344.X disclosed method of the inventive method production sees Table 1 in the relative merits contrast of others, comparing result shows, remove in the manufacturing of railway freight vehicle, second font steel of the present invention needs outside many welding once, and others all are better than the clod wash central sill according to the production of number of patent application 03125344.X disclosed method.
Table 1
| Hot rolling 310 second font steel of the present invention | 03125344.X the clod wash central sill | Estimate | |
| Steel mill's production cost | Smelting → the hot rolling of steel | The smelting of steel → be rolled into sheet material → clod wash becomes central sill | The clod wash central sill need increase the clod wash process cost |
| Goods train | It is first to postwelding, | Directly and side bar | Adopt the inventive method to produce 310 second |
| Manufactory's cost | Again with side bar and the welding of bottom, compartment | With the welding of bottom, compartment | Font steel cost is slightly high |
| Cross-sectional shape | The variable cross-section shape | The uniform thickness cross-sectional shape | The variable cross-section shape more helps bearing the weight on railway freight train casing top |
| Railway freight train manufacturing process | Each exterior angle is rectangular | Each exterior angle is the great circle arcuation | Hot rolling 310 second font steel welding of the present invention and assembling are easily |
| Other defective | No clod wash deformed region | The clod wash deformed region is arranged | The clod wash deformation place very easily forms formation of crack |
Embodiment 1:
5min added Cu and Ni plate before the converter smelting molten steel finished, make the content of Cu in the molten steel, Ni be respectively 0.27% and 0.29%, when C content in the molten steel less than 0.05% the time, in the ladle of tapping immediately, the C content in the molten steel is 0.03%, P content is 0.016%, S content is 0.009%.Tapping 1/3 back adds 1 ton of pre-deoxidant Fe-Al-Mn alloy, Al content is 20% in the Fe-Al-Mn alloy, Mn content is 25%, oxygen concn to 0.005% in the control molten steel, add Fe-Si-Mn, Fe-Si and Fe-Cr alloy again, carry out Si, Mn, Cr is element alloyed, wherein, Si content is 12% in the Fe-Si-Mn alloy, Mn content is 62%, Si content is 74% in the Fe-Si alloy, Cr content is 63% in the Fe-Cr alloy, and Si content is 0.42% in the control molten steel, Mn content is 1.30%, Cr content is 0.24%.In ladle, add Al after having gone out steel
2O
3Content is 21% slag charge 500kg.After molten steel is delivered to electrical heater, heating molten steel to 1615 ℃, in the RH vacuum treatment installation, carry out vacuum-treat immediately, vacuum degree control is at 10KPa, behind the vacuum-treat 5min, add C powder, Fe-Si alloy and Fe-Mn alloy, control C, Si, Mn content are respectively 0.12%, 0.39% and 1.40%, controlling CEN simultaneously is 0.28%, and vacuum processing time is 12min.Feed 800 meters of Si-Ca cored-wires (Ca weight is 35g in every meter Si-Ca cored-wire) after the vacuum-treat, carry out Ca and handle.During continuous-casting steel pouring, liquid steel temperature is controlled at 1545 ℃.Be 10 ℃/min with rate of heating again, adopt pusher-type furnace heating steel billet to 1220 ℃, and begin rolled section steel in insulation under this temperature after 1.5 hours, finishing temperature is controlled to be 850 ℃, rolls the back and adopts the air cooling mode to cool off.
The mechanical property of check shaped steel is: R
EL: 485Mpa, R
m: 615Mpa, Ak
v: 42J.
Embodiment 2:
5min added Cu and Ni plate before the converter smelting molten steel finished, make in the molten steel that Cu content is 0.25%, Ni content is 0.27%, in C content in the molten steel was tapped ladle less than 0.05% the time immediately, the C content in the molten steel was 0.03%, P content is 0.015%, S content is 0.011%.Tapping 1/3 back adds 1 ton of pre-deoxidant Fe-Al-Mn alloy, Al content is 20% in the Fe-Al-Mn alloy, Mn content is 25%, oxygen concn to 0.003% in the control molten steel, add Fe-Si-Mn, Fe-Si and Fe-Cr alloy again, carry out Si, Mn, Cr is element alloyed, wherein, Si content is 12% in the Fe-Si-Mn alloy, Mn content is 62%, Si content is 74% in the Fe-Si alloy, Cr content is 63% in the Fe-Cr alloy, and Si content is 0.46% in the control molten steel, Mn content is 1.36%, Cr content is 0.24%.In ladle, add Al after having gone out steel
2O
3Content is 15% slag charge 500kg.After molten steel is delivered to electrical heater, behind the heating molten steel to 1610 ℃, in the RH vacuum treatment installation, carry out vacuum-treat immediately, vacuum degree control is at 10KPa, behind the vacuum-treat 5min, add C powder, Fe-Si alloy and Fe-Mn alloy, control C, Si, Mn are respectively 0.12%, 0.40% and 1.40%, controlling CEN simultaneously is 0.28%, molten steel vacuum processing time 12min.Feed 800 meters of Si-Ca cored-wires (Ca weight is 35g in every meter Si-Ca cored-wire) after the vacuum-treat, carry out Ca and handle.During continuous-casting steel pouring, liquid steel temperature is controlled to be 1550 ℃.Be 9 ℃/min with rate of heating again, adopt pusher-type furnace heating steel billet to 1200 ℃, and begin rolled section steel in insulation under this temperature after 1.5 hours, finishing temperature is controlled at 750 ℃, rolls the back and adopts the air cooling mode to cool off.
The mechanical property of check shaped steel is: R
EL: 500Mpa, R
m: 620Mpa, Ak
v: 36J.
Embodiment 3:
5min added Cu and Ni plate before the converter smelting molten steel finished, and made in the molten steel that Cu content is 0.26%, Ni content is 0.24%, in C content in the molten steel is tapped ladle less than 0.05% the time immediately.C content in the molten steel is 0.04%, P content is 0.013%, S content is 0.008%.Tapping 1/3 back adds 1 ton of pre-deoxidant Fe-Al-Mn alloy, Al content is 20% in the Fe-Al-Mn alloy, Mn content is 25%, oxygen concn to 0.007% in the control molten steel, add Fe-Si-Mn, Fe-Si and Fe-Cr alloy again, carry out Si, Mn, Cr is element alloyed, wherein, Si content is 12% in the Fe-Si-Mn alloy, Mn content is 62%, Si content is 74% in the Fe-Si alloy, Cr content is 63% in the Fe-Cr alloy, and Si content is 0.43% in the control molten steel, Mn content is 1.34%, Cr content is 0.24%.In ladle, add Al after having gone out steel
2O
3Content is 19% slag charge 500kg.After molten steel is delivered to electrical heater, heating molten steel to 1600 ℃, in the RH vacuum treatment installation, carry out vacuum-treat immediately, vacuum degree control is at 10KPa, behind the vacuum-treat 5min, add C powder, Fe-Si alloy and Fe-Mn alloy, control C content is 0.13%, Si content is 0.42%, Mn content is 1.41%, controlling CEN simultaneously is 0.29%, and the molten steel vacuum processing time is 12min.Feed 800 meters of Si-Ca cored-wires (Ca weight is 35g in every meter Si-Ca cored-wire) after the vacuum-treat, carry out Ca and handle.During continuous-casting steel pouring, liquid steel temperature is controlled at 1545 ℃.Be 9 ℃/min with rate of heating again, adopt pusher-type furnace heating steel billet to 1200 ℃, and begin rolled section steel in insulation under this temperature after 1.5 hours, finishing temperature is controlled at 800 ℃, rolls the back and adopts the air cooling mode to cool off.
The mechanical property of check shaped steel is: R
EL: 500Mpa, R
m: 620Mpa, Ak
v: 38J.
The present invention not only can be used for rail freight with high-strength weather-resistant hot rolling 310 second font steel, also can be used for others, and these all belong to the scope of protection of the invention.
Claims (8)
1, the production method of high strength atmospheric corrorsion resistant section steel is characterized in that, said method comprising the steps of:
1) smelting molten steel makes P in the molten steel≤0.35%, S≤0.15%, V≤0.15%, adds Cu plate and Ni plate again, makes Cu:0.20 in the molten steel～0.40%, Ni:0.15～0.35%, when C content in the molten steel less than 0.05% the time, in the ladle of tapping,
2) in ladle, add pre-deoxidant, make that oxygen concn drops to below 0.01% in the molten steel, add the alloy of Si, Mn and Cr again, make Si:0.30 in the molten steel～0.45%, Mn:1.20～1.40%, Cr:0.20～0.40%, add again and contain Al
2O
3Slag charge,
3) to molten steel heating and Argon, add the alloy of C powder, Si and Mn, make C:0.10～0.15%, Si:0.30～0.50%, Mn:1.20～1.45%, CEN:0.25～0.34%, after liquid steel temperature is 1600～1630 ℃, stop heating, continue Argon 15～30min; Or, after liquid steel temperature is 1600～1630 ℃, stop heating to molten steel heating and Argon, carry out vacuum-treat, the vacuum-treat later stage adds the alloy of C powder, Si and Mn, makes C:0.10～0.15%, Si:0.30～0.50%, Mn:1.20～1.45%, CEN:0.25～0.34%
4) casting, temperature is 1548 ± 10 ℃,
5) with the speed of 8～14 ℃/min heating strand to 1100～1250 ℃, be incubated after 1.5～2.0 hours, rolled section steel, finishing temperature is 700～900 ℃, cool off after rolling, obtain high strength atmospheric corrorsion resistant section steel, its Chemical Composition comprises by weight percentage: C:0.10～0.15%, Si:0.30～0.50%, Mn:1.20～1.45%, Cu:0.20～0.40%, Ni:0.15～0.35%, Cr:0.20～0.40%, P≤0.35%, S≤0.15%, V≤0.15%.
2, the production method of high strength atmospheric corrorsion resistant section steel as claimed in claim 1 is characterized in that, the described pre-deoxidant of step 2 is Al piece or Fe-Al-Mn alloy.
3, the production method of high strength atmospheric corrorsion resistant section steel as claimed in claim 1, it is characterized in that, the described Si alloy of step 2 is Fe-Si or Fe-Si-Mn alloy, the Mn alloy is Fe-Mn or Fe-Si-Mn alloy, and the Cr alloy is middle carbon Fe-Cr, low-carbon (LC) Fe-Cr, little carbon Fe-Cr alloy or Metal Cr.
4, the production method of high strength atmospheric corrorsion resistant section steel as claimed in claim 1, it is characterized in that, vacuum cycle treatment unit and vacuum treatment installation are adopted in the described vacuum-treat of step 3, when adopting the vacuum cycle treatment unit, vacuum tightness is not more than 12KPa, when adopting vacuum treatment installation, vacuum tightness is not more than 10KPa.
5, the production method of high strength atmospheric corrorsion resistant section steel as claimed in claim 1 is characterized in that, the described Argon intensity of step 3 is 0.2～0.4Mpa.
6, the production method of high strength atmospheric corrorsion resistant section steel as claimed in claim 1 is characterized in that, the described vacuum processing time of step 3 is 10～15min.
7, the production method of high strength atmospheric corrorsion resistant section steel as claimed in claim 1 is characterized in that, carries out Ca after the described step 3 again and handles, and the add-on of Ca is steel 0.1～0.3kg per ton.
8, the production method of high strength atmospheric corrorsion resistant section steel as claimed in claim 1 is characterized in that, described step 5 adopts the air cooling mode to cool off.
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| DE102007001098A1 (en) * | 2007-01-04 | 2008-07-10 | Sms Demag Ag | Process and plant for the production of steel |
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| CN101135030B (en) * | 2007-10-12 | 2010-09-08 | 莱芜钢铁集团有限公司 | Weather-resistant hot rolled narrow steel strip and method for manufacturing same |
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| CN109852873B (en) * | 2019-04-09 | 2020-10-09 | 攀钢集团攀枝花钢铁研究院有限公司 | Steel with corrosion resistance for V-containing railway wagon combined brake beam and manufacturing method thereof |
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