CN109023040A - 400MPa grades of antidetonation atmospheric corrosion resistance reinforcing bars and its manufacturing method - Google Patents
400MPa grades of antidetonation atmospheric corrosion resistance reinforcing bars and its manufacturing method Download PDFInfo
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- CN109023040A CN109023040A CN201810821520.7A CN201810821520A CN109023040A CN 109023040 A CN109023040 A CN 109023040A CN 201810821520 A CN201810821520 A CN 201810821520A CN 109023040 A CN109023040 A CN 109023040A
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/02—Ferrous alloys, e.g. steel alloys containing silicon
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21C—PROCESSING OF PIG-IRON, e.g. REFINING, MANUFACTURE OF WROUGHT-IRON OR STEEL; TREATMENT IN MOLTEN STATE OF FERROUS ALLOYS
- C21C7/00—Treating molten ferrous alloys, e.g. steel, not covered by groups C21C1/00 - C21C5/00
- C21C7/04—Removing impurities by adding a treating agent
- C21C7/064—Dephosphorising; Desulfurising
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D8/00—Modifying the physical properties by deformation combined with, or followed by, heat treatment
- C21D8/06—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of rods or wires
- C21D8/065—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of rods or wires of ferrous alloys
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D8/00—Modifying the physical properties by deformation combined with, or followed by, heat treatment
- C21D8/06—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of rods or wires
- C21D8/08—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of rods or wires for concrete reinforcement
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C33/00—Making ferrous alloys
- C22C33/04—Making ferrous alloys by melting
- C22C33/06—Making ferrous alloys by melting using master alloys
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/002—Ferrous alloys, e.g. steel alloys containing In, Mg, or other elements not provided for in one single group C22C38/001 - C22C38/60
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/005—Ferrous alloys, e.g. steel alloys containing rare earths, i.e. Sc, Y, Lanthanides
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/04—Ferrous alloys, e.g. steel alloys containing manganese
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
- C22C38/40—Ferrous alloys, e.g. steel alloys containing chromium with nickel
- C22C38/42—Ferrous alloys, e.g. steel alloys containing chromium with nickel with copper
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
- C22C38/40—Ferrous alloys, e.g. steel alloys containing chromium with nickel
- C22C38/46—Ferrous alloys, e.g. steel alloys containing chromium with nickel with vanadium
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
- C22C38/40—Ferrous alloys, e.g. steel alloys containing chromium with nickel
- C22C38/58—Ferrous alloys, e.g. steel alloys containing chromium with nickel with more than 1.5% by weight of manganese
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
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- Organic Chemistry (AREA)
- Mechanical Engineering (AREA)
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- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Crystallography & Structural Chemistry (AREA)
- Treatment Of Steel In Its Molten State (AREA)
Abstract
The present invention relates to a kind of 400MPa grades of antidetonation atmospheric corrosion resistance reinforcing bar and its manufacturing methods, wherein 400MPa grades of antidetonation atmospheric corrosion resistance reinforcing bars, its chemical composition content by weight percentage are as follows: C:0.13~0.20%, Si:0.20~0.60%, Mn:0.95~2.0%, Cu:0.10~12.0%, P:0.06~1.50%, Cr:0.20~2.50%, Ni:0.0~2.0%, V:0.0~2.8%, RE:0.0~2.0%, surplus are Fe and inevitable impurity.The reinforcing bar has the advantages that the good corrosion resistance of reinforcing bar, further improves the intensity and service life of reinforcing bar.
Description
Technical field
The present invention relates to metallurgical technology field, in particular to a kind of 400MPa grades of antidetonation atmospheric corrosion resistance reinforcing bar and 400MPa
The manufacturing method of grade antidetonation atmospheric corrosion resistance reinforcing bar.
Background technique
In industry and rural stmosphere, common reinforcing bar is easy to be corroded, and will form loose rusty scale after corrosion,
Also some micro-cracks can be generated, the protective effect of rebar matrix is gradually weakened, cannot be played a protective role.Cause corrosion factor
Very much, the mechanism of corrosion is also not quite similar, and is generally divided into three kinds of electrochemical corrosion, chemical attack and stress corrosion forms.
Weather resisting steel is usually that the alloying elements such as a certain amount of Cu, P or Ni, Mo, Nb, Ti, Cr are added in steel, is made
At a kind of good low-alloy steel of atmospheric corrosion resistance.The mechanism of weather resisting steel is mainly steel feelings existing for moisture film
Under condition, the process that the oxygen in air is electrochemically reacted by rusty scale, rusty scale is by loose outer rusty scale and fine and close interior rust
Layer is formed, and the alloying element in steel is mainly to be acted on by the influence of interior rusty scale.Generally in the corruption of weather resisting steel
It loses in product, it can be observed that rusty scale in Cu, P, Cr densification.
The corrosion resistance of reinforcing bar has become the project that industrialized country is mainly studied, the various corrosion-resistant steel bars of high life,
The use scope of weather-proof reinforcing bar expands increasingly, in order to solve the etching problem of reinforcing bar, urgent need develop it is some cost is relatively low,
Atmospheric corrosion resistance reinforcing bar easy to spread.
Summary of the invention
In view of this, the present invention provides a kind of 400MPa grades of antidetonation atmospheric corrosion resistance reinforcing bar and the 400MPa grades of resistance to atmosphere of antidetonation
The manufacturing method of corrosion reinforcing bar.
The present invention provides a kind of 400MPa grades of antidetonation atmospheric corrosion resistance reinforcing bar, by weight percentage chemical composition content
Are as follows: C:0.13~0.20%, Si:0.20~0.60%, Mn:0.95~2.0%, Cu:0.10~12.0%, P:0.06~
1.50%, Cr:0.20~2.50%, Ni:0.0~2.0%, V:0.0~2.8%, RE:0.0~2.0%, surplus is for Fe and not
Evitable impurity.
The present invention also provides a kind of manufacturing methods of above-mentioned reinforcing bar, comprising: desulfurizing iron: using the desulfurization of KR method, desulfurizing agent
Be based on lime stone, then be incorporated a little fluorite, aluminium be fluxing agent；Combined blown converter is smelted: using single-slag practice, finishing slag basicity is pressed
3.0 controls, converter use low catch carbon technique, and converter terminal controls target C and is not more than 0.06%, and tapping temperature control is not less than
1630℃；LF refining: manganese iron, manganese metal, low-carbon ferrochromium, molybdenum-iron, nickel plate alloying are used, final deoxidizing, which uses, aluminium deoxidation；Even
Casting: molten steel is cast under a shielding gas, and for casting speed control in 2.3~2.5m/min, Continuous Casting Secondary Cooling is cooling using weak cold, and
Continuous casting billet is obtained with permanent pulling rate, slab heating temperature is controlled at 1100~1200 DEG C, 1050~1150 DEG C of steel billet tapping temperature, opened
950~1050 DEG C of temperature are rolled, 900~950 DEG C of finishing temperature, deflection is 11~20% to steel billet per pass, total deformation 11
~35%.
Further, in the LF refining, denaturant is added to molten steel.
Further, in the continuous casting process, rolling cooling procedure cannot wear water.
Compared with the existing technology, the 400MPa grade antidetonation atmospheric corrosion resistance reinforcing bar tool prepared according to the method provided by the invention
Have the following advantages: the good corrosion resistance of reinforcing bar further improves the intensity and service life of reinforcing bar.
Detailed description of the invention
Above-mentioned and/or additional aspect of the invention and advantage will become from the description of the embodiment in conjunction with the following figures
Obviously and it is readily appreciated that, in which:
Fig. 1 shows 400MPa grades of antidetonation atmospheric corrosion resistance reinforcing bar metallographic structure according to an embodiment of the invention and shines
Piece.
Specific embodiment
The invention discloses a kind of 400MPa grades of antidetonation atmospheric corrosion resistance reinforcing bar and its manufacturing method, those skilled in the art
Present disclosure can be used for reference, realization of process parameters is suitably modified.In particular, it should be pointed out that all similar substitutions and modifications pair
It is it will be apparent that they are considered as being included in the present invention for those skilled in the art.Method and application of the invention is
Through being described by preferred embodiment, related personnel obviously can not depart from the content of present invention, in spirit and scope to this
Methods and applications described in text are modified or appropriate changes and combinations, carry out implementation and application the technology of the present invention.
The present invention provides a kind of 400MPa grades of antidetonation atmospheric corrosion resistance reinforcing bar, by weight percentage chemical composition content
Are as follows: C:0.13~0.20%, Si:0.20~0.60%, Mn:0.95~2.0%, Cu:0.10~12.0%, P:0.06~
1.50%, Cr:0.20~2.50%, Ni:0.0~2.0%, V:0.0~2.8%, RE:0.0~2.0%, surplus is for Fe and not
Evitable impurity.
The yield strength R of the reinforcing bar after rollingp0.2>=400MPa, tensile strength Rm>=600MPa, elongation percentage A >=16%, by force
It bends and compares Rm 0/ReL 0>=1.25, mark in the wrong compares ReL 0/ReL≤1.30.Since the most effective alloying element for the oxidation resistance for improving steel is
Chromium, silicon and aluminium, but silicon in steel, aluminium mass fraction it is more when steel become fragile, therefore in anti-chlorine ion corrosion reinforcing bar, Cr is added
Element enables steel to form one layer of complete, fine and close and stable protective oxide layer on the surface of steel, to improve the antioxygen of steel
Change ability.The intensity of solid solution and cold work hardening degree in steel, which can be improved, in silicon reduces the toughness of steel and plasticity, and can be significant
Ground improves elastic limit, yield limit and the yield tensile ratio of steel, and when the steel containing silicon heats in oxidizing atmosphere, surface will also be formed
One layer of SiO2Film plays the role of corrosion resistant to improve the inoxidizability of steel at high temperature.Nickel the intensity of steel can be improved and
Do not significantly reduce its toughness, reduce the brittle transition temperature of steel, that is, the low-temperature flexibility of steel can be improved, improve steel processability and can
Weldering property, improves the resistance to corrosion of steel, can not only be acidproof, and the corrosion of energy alkali resistant and atmosphere.Vanadium has very heat-flash epistasis, can show
Landing improves the welding performance of common low carbon low-alloy steel.
Correspondingly, the present invention also provides a kind of manufacturing methods of above-mentioned reinforcing bar, comprising: desulfurizing iron: the desulfurization of KR method is used,
Desulfurizing agent be based on lime stone, then be incorporated a little fluorite, aluminium be fluxing agent；Combined blown converter is smelted: using single-slag practice, finishing slag
For basicity by 3.0 controls, converter uses low catch carbon technique, and converter terminal controls target C and is not more than 0.06%, and tapping temperature controls not
Less than 1630 DEG C；LF refining: manganese iron, manganese metal, low-carbon ferrochromium, molybdenum-iron, nickel plate alloying are used, final deoxidizing, which uses, has aluminium de-
Oxygen；Continuous casting: molten steel is cast under a shielding gas, and for casting speed control in 2.3~2.5m/min, Continuous Casting Secondary Cooling is cold using weak cold
But, and with permanent pulling rate obtain continuous casting billet, slab heating temperature control at 1100~1200 DEG C, steel billet tapping temperature 1050~
1150 DEG C, 950~1050 DEG C of start rolling temperature, 900~950 DEG C of finishing temperature, deflection is 11~20% to steel billet per pass, total to become
Shape amount is 11~35%.
Further, in the LF refining, denaturant is added to molten steel.
Further, in the continuous casting process, rolling cooling procedure cannot wear water.
Desulfurizing iron use the desulfurization of KR method, desulfurizing agent be based on lime stone, then be incorporated a little fluorite, aluminium be fluxing agent.
Converter is smelted using combined blown converter, and using single-slag practice, finishing slag basicity is by 3.0 controls, for the lower tapping phosphorus of guarantee, suitably
Tapping temperature and metastable tapping carbon, converter use low catch carbon technique, and converter terminal controls target C and is not more than 0.06%,
Tapping temperature control is not less than 1630 DEG C.Refining uses manganese iron, manganese metal, low-carbon ferrochromium, molybdenum-iron, nickel plate alloying, final deoxidizing
Using there is aluminium deoxidation.Influence of the nonmetallic inclusionsin steel to the corrosion resistance of steel is bigger, and molten steel need to be added in LF refining
Some denaturants, rare earth alloy, which is added, in the production of this atmospheric corrosion resistance reinforcing bar makes non-metallic inclusion be denaturalized nodularization, disappears
Their adverse effects to rigidity matter are removed or reduced, to purify steel, total inclusion content is reduced, connects field trash with steel matrix
Corrosion between contacting surface is reduced.Non-metallic inclusion quantity is more, and particle is larger to generate baneful influence to steel, so must incite somebody to action
Corrosion rate in steel big be mingled with (MnS) be denaturalized and is mingled with for corrosion rate is small, so that it is electric to reduce steel matrix inside film micro area
Chemical attack.Continuous casting steel is cast under a shielding gas, and casting speed control is in 2.3~2.5m/min, due to the addition of alloy, continuous casting
Two cold water distributions are cooling using weak cold, prevent slab from face crack, internal flaw occur, while guaranteeing that permanent pulling rate obtains continuous casting as far as possible
Base.
Slab heating temperature control at 1100~1200 DEG C, 1050~1150 DEG C of steel billet tapping temperature, start rolling temperature 950~
1050 DEG C, 900~950 DEG C of finishing temperature, deflection is 11~20% to steel billet per pass, and total deformation is 11~35%.To protect
The good mechanical property of product is demonstrate,proved, rolling cooling procedure must not wear water, mainly since alloying element content is more, greatly increase
The harden ability of steel is added, has such as carried out Water cooling in preparation process, be easy to get quenching structure, reduce plastic property of reinforcement rebar and welding
Performance.
Compared with the existing technology, the 400MPa grade antidetonation atmospheric corrosion resistance reinforcing bar tool prepared according to the method provided by the invention
Have the following advantages: the good corrosion resistance of reinforcing bar further improves the intensity and service life of reinforcing bar.
Below with reference to embodiment, the present invention is further explained:
Embodiment 1
The chemical component of 400MPa grades of antidetonation atmospheric corrosion resistance reinforcing bars is as shown in table 1 in this example.The main system of the reinforcing bar
Standby technique are as follows: desulfurizing iron-converter-LF refining-continuous casting-rolling.Desulfurizing iron: removing blast furnace slag before desulfurization, to improve
Desulfuration efficiency；Taking iron ore melting is molten iron, and molten iron uses the desulfurization of KR method, i.e., uses revolving speed for 90r/min's the molten iron
After stirring 2min, desulfurizing agent is added in stirring paddle stirring, and the pulverized limestone and fluorite that the mass ratio that desulfurizing agent is 9:1 mixes stir anti-
10min is answered, 5min is stood.Desulfurizing iron removes desulfurization slag after standing, and stably desulphurizing effect prevents desulfurization slag from entering converter and causes
Sulphur is returned in converter, guarantees that sulfur content control is below 0.01% in steel.Converter: using top and bottom complex blowing carry out decarburization, dephosphorization, 1650 DEG C
Lower smelting into molten steel carbon content lower than 0.05%, phosphorus content lower than 0.01% tapping, used in tapping process protective gas with
The pressure of 0.5MPa stirs molten steel, and ferrosilicon, silicomangan deoxidation is added when carrying out to 1/4 in tapping, carbon dust and slag material is added, out
A large amount of slags are prevented when steel, meanwhile, the protective gas pressure is gradually reduced with tap.Refining: using LF external refining,
Deoxidation oxygen content into molten steel is 0.002% at 1575 DEG C, the alloying element of manganese iron, nickel plate and ferrochrome, vanadium is added, refining terminates
Ca-Fe alloy line is fed afterwards, while guaranteeing the soft blow time not less than 10min.Continuous casting: guarantee that permanent pulling rate carries out drawing steel, pulling rate control as far as possible
For system in 2.3m/min, casting blank section is 150mm × 150mm, and slab length is 11.5m.Rolling: specific rolling mill practice such as 2 institute of table
Show, continuous casting billet is heated to 1200 DEG C, comes out of the stove 1200 DEG C of thermometric or so, rolled after high-pressure water descaling, rolling temperature 1050
± 20 DEG C, through roughing, in roll after, control 950 ± 20 DEG C of finishing temperature, reinforcing bar not can be carried out in the operation of rolling and wear water, then
Upper cold bed, into finishing, bundling process.
After offline to reinforcing bar examine mechanical property, metallurgical tissue picture as shown in Figure 1, mechanical property the results are shown in Table 3,
Detection method is carried out referring to " GB1499.2-2007 concrete reinforcement steel second part: hot rolled ribbed bars ".Referring to national standard
Bending and reverse bending test method regulation are tested in " GB/T33953-2017 armored concrete corrosion resistant steel bar ", positive
Bending observes rebar surface for after 180 ° of bar bending, does not find obvious macroscopic crackle.Back-flexing be by reinforcing bar just
To 90-degree bent, 30min then is kept the temperature in 100 ± 20 DEG C of heating furnace, reverse bending test is carried out after natural cooling, then
To 20 ° of back-flexing, rebar surface is observed after the test, to find obvious macroscopic crackle.
Corrosion resisting property test: week, leaching corrosion test was referring to YB/T4368-2014 " corrosion test in reinforcing bar industrial atmospheric environment
Method " it carries out.Sample is the cylinder of 18mm × 50mm, and testing liquid is that initial concentration is (0.34 ± 0.009) mol/L (quality
Score be 2.0% ± 0.05%) sodium chloride solution.Specific experimental condition are as follows: temperature: 45 DEG C ± 2 DEG C；Humidity: 70% ±
10%RH；Test period: 168h；Each cycle period；60min±2min；Wherein infiltrating time: 12min ± 2min；After baking
Specimen surface maximum temperature: 70 DEG C ± 10 DEG C, the results are shown in Table 4 for corrosion resistance test.
The chemical component of 1 400MPa grades of antidetonation atmospheric corrosion resistance reinforcing bar of table
The rolling mill practice of 2 400MPa grades of antidetonation atmospheric corrosion resistance reinforcing bar of table
| Process program | Tapping temperature/DEG C | Start rolling temperature/DEG C | Enter final rolling temperature/DEG C | Finishing temperature/DEG C |
| Before technique | 1200±20 | 1050±20 | 1050±20 | 950±20 |
The mechanical property result of 3. 400MPa grades of antidetonation atmospheric corrosion resistance reinforcing bar of table
| Number | Rp0.2/MPa | Rm/MPa | A% | Z% | Rm 0/ReL 0 | ReL 0/ReL |
| 1-1 | 467 | 663 | 25.0 | 70 | 1.42 | 1.17 |
| 1-2 | 477 | 666 | 27.0 | 68 | 1.40 | 1.19 |
| 1-3 | 464 | 650 | 26.0 | 69 | 1.40 | 1.16 |
| 1-4 | 465 | 657 | 25.0 | 66 | 1.41 | 1.16 |
4 corrosion resistance test result of table
| Number | Corrosion rate (g/m2·h) | Relatively corrosive rate |
| HRB400 | 4.895 | 1.00 |
| Compare sample 1 | 3.064 | 0.63 |
As shown in the above, the 400MPa grade antidetonation atmospheric corrosion resistance reinforcing bar of method preparation provided by the invention has such as
Lower advantage: the good corrosion resistance of reinforcing bar further improves the intensity and service life of reinforcing bar.
The above is only a preferred embodiment of the present invention, it is noted that for the ordinary skill people of the art
For member, various improvements and modifications may be made without departing from the principle of the present invention, these improvements and modifications are also answered
It is considered as protection scope of the present invention.
Claims (4)
1. a kind of 400MPa grades of antidetonation atmospheric corrosion resistance reinforcing bar, which is characterized in that chemical composition content by weight percentage are as follows:
C:0.13~0.20%, Si:0.20~0.60%, Mn:0.95~2.0%, Cu:0.10~12.0%, P:0.06~1.50%,
Cr:0.20~2.50%, Ni:0.0~2.0%, V:0.0~2.8%, RE:0.0~2.0%, surplus is for Fe and inevitably
Impurity.
2. the manufacturing method of 400MPa grades of antidetonation atmospheric corrosion resistance reinforcing bar described in claim 1 characterized by comprising
Desulfurizing iron: use the desulfurization of KR method, desulfurizing agent be based on lime stone, then be incorporated a little fluorite, aluminium be fluxing agent；
Combined blown converter is smelted: using single-slag practice, finishing slag basicity uses low catch carbon technique, converter terminal control by 3.0 controls, converter
Target C processed is not more than 0.06%, and tapping temperature control is not less than 1630 DEG C；
LF refining: manganese iron, manganese metal, low-carbon ferrochromium, molybdenum-iron, nickel plate alloying are used, final deoxidizing, which uses, aluminium deoxidation；
Continuous casting: molten steel is cast under a shielding gas, and for casting speed control in 2.3~2.5m/min, Continuous Casting Secondary Cooling is cold using weak cold
But, and with permanent pulling rate obtain continuous casting billet, slab heating temperature control at 1100~1200 DEG C, steel billet tapping temperature 1050~
1150 DEG C, 950~1050 DEG C of start rolling temperature, 900~950 DEG C of finishing temperature, deflection is 11~20% to steel billet per pass, total to become
Shape amount is 11~35%.
3. the manufacturing method of 400MPa grades of antidetonation atmospheric corrosion resistance reinforcing bar according to claim 2, which is characterized in that described
In LF refining, denaturant is added to molten steel.
4. the manufacturing method of 400MPa grades of antidetonation atmospheric corrosion resistance reinforcing bar according to claim 2, which is characterized in that described
In continuous casting process, rolling cooling procedure cannot wear water.
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| CN110695084A (en) * | 2019-10-22 | 2020-01-17 | 中冶南方武汉钢铁设计研究院有限公司 | Production method of non-heating high-strength steel |
| CN111088463A (en) * | 2020-01-21 | 2020-05-01 | 鞍钢股份有限公司 | Steel bar resistant to corrosion in low-temperature atmospheric environment and production method thereof |
| CN112662948A (en) * | 2020-12-09 | 2021-04-16 | 本钢板材股份有限公司 | RE-Cr-Cu composite corrosion-resistant steel and preparation method thereof |
| CN113481440A (en) * | 2021-09-08 | 2021-10-08 | 北京科技大学 | Corrosion-resistant and anti-seismic steel, steel bar and preparation method thereof |
| CN113981314A (en) * | 2021-10-20 | 2022-01-28 | 陕钢集团产业创新研究院有限公司 | Non-refined 30MnSi steel and production method thereof |
| CN114196884A (en) * | 2021-12-13 | 2022-03-18 | 芜湖新兴铸管有限责任公司 | 400 MPa-grade microalloyed corrosion-resistant reinforcing steel bar and production method thereof |
| CN114703423A (en) * | 2022-03-30 | 2022-07-05 | 江苏永钢集团有限公司 | Production method of rare earth reinforcing steel bar |
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