CN109628844A - Corrosion-resistant steel with yield strength of 700MPa for coal transportation open wagon and manufacturing method thereof - Google Patents

Corrosion-resistant steel with yield strength of 700MPa for coal transportation open wagon and manufacturing method thereof Download PDF

Info

Publication number
CN109628844A
CN109628844A CN201910110947.0A CN201910110947A CN109628844A CN 109628844 A CN109628844 A CN 109628844A CN 201910110947 A CN201910110947 A CN 201910110947A CN 109628844 A CN109628844 A CN 109628844A
Authority
CN
China
Prior art keywords
steel
corrosion
yield strength
continuous casting
700mpa
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.)
Granted
Application number
CN201910110947.0A
Other languages
Chinese (zh)
Other versions
CN109628844B (en
Inventor
刘志伟
张瑞琦
孙傲
郭晓宏
高磊
杨玉
金星
王洪海
景鹤
王鑫
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Angang Steel Co Ltd
Original Assignee
Angang Steel Co Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Angang Steel Co Ltd filed Critical Angang Steel Co Ltd
Priority to CN201910110947.0A priority Critical patent/CN109628844B/en
Publication of CN109628844A publication Critical patent/CN109628844A/en
Application granted granted Critical
Publication of CN109628844B publication Critical patent/CN109628844B/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Classifications

    • 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
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21B—ROLLING OF METAL
    • B21B1/00—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations
    • B21B1/46—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations for rolling metal immediately subsequent to continuous casting
    • B21B1/463—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations for rolling metal immediately subsequent to continuous casting in a continuous process, i.e. the cast not being cut before rolling
    • 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
    • C21D8/02—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips
    • C21D8/0205—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips 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
    • C21D8/02—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips
    • C21D8/0221—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips characterised by the working steps
    • C21D8/0226—Hot rolling
    • 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
    • C21D8/02—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips
    • C21D8/0247—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips characterised by the heat treatment
    • C21D8/0263—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips characterised by the heat treatment following hot rolling
    • 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
    • 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
    • C22C38/008—Ferrous alloys, e.g. steel alloys containing tin
    • 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
    • C22C38/06—Ferrous alloys, e.g. steel alloys containing aluminium
    • 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
    • C22C38/44—Ferrous alloys, e.g. steel alloys containing chromium with nickel with molybdenum or tungsten
    • 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
    • C22C38/48—Ferrous alloys, e.g. steel alloys containing chromium with nickel with niobium or tantalum
    • 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
    • C22C38/50—Ferrous alloys, e.g. steel alloys containing chromium with nickel with titanium or zirconium
    • 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
    • C22C38/54—Ferrous alloys, e.g. steel alloys containing chromium with nickel with boron
    • 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
    • C22C38/60—Ferrous alloys, e.g. steel alloys containing lead, selenium, tellurium, or antimony, or more than 0.04% by weight of sulfur

Landscapes

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • Heat Treatment Of Steel (AREA)
  • Heat Treatment Of Sheet Steel (AREA)

Abstract

The invention discloses corrosion-resistant steel with yield strength of 700MPa for coal transportation open cars and a manufacturing method thereof. The steel contains C: 0.055% -0.079%, Si: 0.21-0.29%, Mn: 1.41-1.69%, P is less than or equal to 0.018%, S is less than or equal to 0.006%, Als: 0.015% -0.045%, Cr: 0.51-0.99%, Ni: 0.11-0.19%, Cu: 0.29-0.46%, Nb: 0.041-0.062%, Ti: 0.017-0.042%, Sb: 0.051 to 0.119 percent, Sn: 0.037% -0.089%, Mo: 0.11% -0.19%, B: 0.0008% -0.0019%, Ca: 0.0008% -0.0030%; the balance of iron and inevitable impurities; heating a plate blank of 135-170 mm to 1228-1249 ℃, wherein the rough rolling temperature is higher than 1100 ℃, finish rolling at 1000-1100 ℃, finish rolling at 830-895 ℃, coiling at 580-650 ℃, and the steel plate has excellent sulfuric acid and chloride ion corrosion resistance.

Description

700MPa grades of transporting coal open-top car corrosion-resisting steels of yield strength and its manufacturing method
Technical field
The invention belongs to rolling stock rings domains, are related to a kind of be suitble in the corrosion ring containing acid medium and chloride ion Corrosion-resisting steel and its manufacturing method used in border.
Background technique
General steel open wagon is usually only by atmospheric corrosion, and transporting coal open-top car will be invaded by quite harsh corrosive environment It attacks.Firstly, containing in coal has the sulfide compared with extensive chemical corrosiveness to steel；Furthermore because of coal mining Shi Yaoyong water slug, institute With aqueous in coal, in addition when winter transporting coal, to prevent from freezing, certain salts are added, to reduce freezing point, thus bring corrosion The extremely strong chloride ion of property.
Currently, the manufacture material that transporting coal open-top car uses is aluminium alloy, stainless steel or traditional weathering steel.Aluminium alloy and stainless Although steel has good corrosion resistance, its weldability and mouldability are had certain problems, and the cost is relatively high；It is existing Although railway freight-car weathering steel intensity, weldability and processability it is good, its corrosion resistance cannot be met the requirements；New one Although being significantly improved for high corrosion-resisting steel weathering steel atmospheric corrosion resistance, be not appropriate for containing acid medium and In the corrosive environment of chloride ion.
Chinese patent CN101376953B discloses a kind of high-corrosion resistant high-strength weather resisting steel and its manufacturing method, during it passes through The addition of equal size alloying elements cr guarantees that steel grade has excellent atmospheric corrosion resistance, resistance to big relative to traditional weathering steel Gas corrosion performance is enhanced about more than once.The chemical component of the high-corrosion resistant high-strength weather resisting steel of this method manufacture is (wt%): C 0.002%~0.005%, Si 0.20%~0.40%, Mn 0.01%~0.05%, P≤0.020%, S≤0.008%, Al 0.01%~0.05%, Cu 0.20%~0.40%, Cr 4.50%~5.50%, Ni 0.10%~0.40%, Ca 0.001%~0.006%, N 0.001%~0.006%, Ti 0.01%~0.03%, surplus be Fe and inevitably its His impurity element.Steel plate yield strength is greater than 700MPa, and elongation percentage is greater than 20%, and it is high-strength resistance to that atmospheric corrosion resistance is higher than tradition Hou Gang.
Chinese patent CN101135029A discloses yield strength 700MPa grade atmospheric corrosion resistant steel and its manufacturing method, should Method manufacture 700MPa grade atmospheric corrosion resistant steel band chemical component be (wt%): C 0.05%~0.10%, Si≤ 0.50%, Mn 0.8%~1.6%, P≤0.020%, S≤0.010%, Al 0.01%~0.05%, Cu 0.20%~ 0.55%, Cr 0.40%~0.80%, Ni 0.12%~0.40%, Ca 0.001%~0.006%, N 0.001%~ 0.006%, it also include Nb≤0.07%, Ti≤0.18%, two or more in Mo≤0.35%, remaining is for Fe and not It can avoid impurity.The yield strength of steel plate is not less than 700MPa, while its relatively corrosive rate is on the basis of current traditional weathering steel On reduce 1 times.
Chinese patent CN101994063A discloses yield strength in the weathering steel and its manufacturing method of 700MPa or more, is somebody's turn to do The yield strength of method manufacture is (wt%): C 0.02%~0.10%, Si in the chemical component of the weathering steel of 700MPa or more 0.1%~0.4%, Mn 0.3%~1.3%, P≤0.01%, S≤0.006%, Cu 0.2%~0.5%, Cr 2.5%~ 10.0%, Ni 0.2%~1.0%, Nb 0.02%~0.06%, Al 0.01%~0.05%, N≤0.005%, Ti 0.02%~0.10%, surplus is Fe and inevitable impurity.Steel plate is with the yield strength of 700MPa or more and excellent Toughness, while its relatively corrosive rate reduces 1 times on the basis of current traditional weathering steel.
Chinese patent CN103343295A discloses the high-intensitive high-corrosion resistance steel plate of yield strength 700MPa a kind of Material and its production method, chemical component of the yield strength that this method manufactures in the high-intensitive high-corrosion resistance plate of 700MPa For (wt%): its chemical component is C 0.002%~0.045%, Si 0.15%~0.25%, Mn 0.1%~0.9%, P≤ 0.012%, S≤0.008%, Cu 0.25%~0.5%, Cr 2.80%~4.0%, Ni 0.12%~0.35%, Al 0.01%~0.05%, Nb 0.015%~0.040%, Ti 0.01%~0.02%, surplus are Fe and inevitable impurity Element.Yield strength >=700MPa of steel plate, tensile strength >=900MPa, 20% or more elongation percentage, atmospheric corrosion resistance Relatively corrosive rate is 30% or more of Q345B.
Chinese patent CN103302255A discloses a kind of thin strap continuous casting 700MPa grades of high-strength air corrosion-resistant steel manufacturers Method, this method manufacture 700MP grade high-strength air corrosion-resistant steel chemical component be (wt%): C 0.03%~0.1%, Si≤ 0.4%, Mn 0.75%~2.0%, P 0.07%~0.22%, S≤0.01%, N≤0.012%, Cu 0.25%~ 0.8%, Cr 0.3%~0.8%, Ni 0.12%~0.4%, additionally it contained in microalloy element Nb, V, Ti, Mo at least One kind, Nb 0.01%~0.1%, V 0.01%~0.1%, Ti 0.01%~0.1%, Mo 0.1%~0.5%, remaining is Fe and inevitable impurity.Yield strength >=700MPa of steel band, tensile strength >=780MPa, 18% or more elongation percentage, 180 ° of bending property qualifications.
Chinese patent CN 104294111A discloses a kind of manufacturing method of transporting coal open-top car aluminum alloy plate materials, the invention Related plate is aluminum alloy plate materials, not only higher cost, but also yield strength is only 220~240MPa.
In patent disclosed above, without the steel plate special or cost of a kind of suitable transporting coal open-top car actual operation environment It is higher, or only there is good atmospheric corrosion resistance, requirement can be not achieved in medium corrosion resistance, and intensity, which is not achieved, to be made With requiring.
Summary of the invention
For current transporting coal open-top car steel produce, such as: using aluminium alloy, stainless steel cost compared with High, welding and mouldability are bad, are not reached requirement using existing steel corrosion resistance, the technical solution that the present invention is specifically proposed.
The purpose of the present invention is to provide a kind of yield strength 700MPa grades of transporting coals open-top car corrosion-resisting steel, especially a kind of thickness Metric lattice are 700MPa grades of transporting coal open-top car corrosion-resisting steels of yield strength and its manufacturing method of 3.0~6.0mm, to solve existing skill The above problem present in art.Steel plate not only has good atmospheric corrosion resistance, but also has excellent resistance to sulfuric acid and chlorine Corrosive nature under ion coexisted environment, in addition to this, steel plate also have high-intensitive, excellent processability and low-temperature flexibility, It is suitable for the manufacture of transporting coal open-top car.
Specific technical solution is:
The present invention proposes a kind of 700MPa grades of transporting coal open-top car corrosion-resisting steel, and chemical component is as follows by mass percentage: C: 0.055%~0.079%, Si:0.21%~0.29%, Mn:1.41%~1.69%, P≤0.018%, S≤0.006%, Als:0.015%~0.045%, Cr:0.51%~0.99%, Ni:0.11%~0.19%, Cu:0.29%~0.46%, Nb:0.041%~0.062%, Ti:0.017%~0.042%, Sb:0.051%~0.119%, Sn:0.037%~ 0.089%, Mo:0.11%~0.19%, B:0.0008%~0.0019%, Ca:0.0008%~0.0030%, remaining is Fe With inevitable element.
C: being main intensified element in steel, can significantly improve the intensity of steel plate, but the C of more content welds steel plate Property, toughness and plasticity are unfavorable.Low C, which is designed, to be to limit the formation of pearlitic structrure and other carbide, guarantees the micro- of steel Structure is equal phase constitution, avoids electrochemical corrosion caused by the potential difference between out-phase, improves the corrosion resisting property of steel, this hair Bright middle C content control is 0.055%~0.079%.
Si:Si solid solubility with higher in steel has preferable solution strengthening effect, but its too high levels can make steel Plasticity and toughness reduce, welding performance decline.Mainly as deoxidant element in the present invention, not as main intensified element, Si Content is controlled 0.21%~0.29%.
Mn: there is solution strengthening effect, moreover it is possible to increase stabilization of austenite, harden ability is also advantageous to improving, but manganese content It is excessive, the center segregation tendency of continuous casting billet can be increased, solderability and welding heat influence area toughness is also caused to deteriorate, it will in the present invention Mn content is controlled 1.41%~1.69%.
P: can effectively improve the atmospheric corrosion resistance of steel, but phosphorus is easy to be segregated, increase the cold brittleness of steel, to weldability and Mouldability is unfavorable.To guarantee welding performance and processability requirement, P content is controlled it in the present invention and is not higher than 0.018%.
S: being harmful element in steel, and steel is made to generate red brittleness, reduces the ductility and toughness of steel, deteriorates welding performance, together When S presence will deteriorate the atmospheric corrosion resistance of steel, S content is controlled it not higher than 0.006% in the present invention.
Als: being common deoxidier, and 0.015%~0.045% aluminium is added in steel, can refine crystal grain.
Cr, Ni, Cu: three kinds of elements are added in steel simultaneously has good effect to atmospheric corrosion resistance is improved.Steel plate In corrosion process, the enrichment of element such as Cu, Cr, Ni in the rusty scale of matrix, formed it is fine and close, close to amorphous stabilization Rusty scale.Ni can also significantly improve the low-temperature flexibility of steel simultaneously, increase substantially substrate and Low Temperature Impact Toughness of Heat-affected Zone. The weight ratio of Ni/Cu is 1/2 or more, can effectively prevent steel containing Cu due to check crack caused by hot-short.By the content of Cr in the present invention Control is 0.51%~0.99%, by the content control of Ni 0.11%~0.19%, by the content control of Cu 0.29%~ 0.46%.
Nb: both can be improved the recrystallization temperature of austenite, carry out controlled rolling in higher temperature, reduce milling train Load, while austenite can be reduced again to ferrite transformation temperature, promote the formation of low-carbon bainite or acicular ferrite, change The performance of kind steel.Nb also improves the intensity of steel by precipitation strength.The range of Nb content of the invention be 0.041%~ 0.062%.
Ti: being important V-N steel element in the present invention, not only can effectively refine outside crystal grain, and energy and C Tiny carbide and nitride or carbonitride are formed with N, there is very high precipitation enhancement, steel can be significantly increased The intensity of plate.Ti content is controlled 0.017%~0.042% in the present invention.
Sb, Sn:Sb and Sn element are constantly enriched in steel usually as harmful element, severely impact the quality of steel. Sb and Sn is to improve corrosion proof effective element in the present invention, and by the compound addition of Sb, Sn and Cr, collaboration is rich in rusty scale Collection, and form one layer of fine and close dense oxidation film rich in elements such as Sb, Sn, Cr higher than several times of matrix, significantly obstruction etch Property the ion transmission and corrosive environment that coexists of more resistance to sulfate radical and chloride ion.In order to ensure obtaining required corrosion resistance It can, it is necessary to play the common effect of three elements.Ti and Sb attracts each other simultaneously, when in Ti segregation to crystal boundary, also drags Sb It drags on crystal boundary, so that Sb is precipitated with tiny second phase particles, rather than field trash form is precipitated, and particle size is in 10~30nm Between, to improve the intensity of steel plate.Sb is acid to resistance to sulfuric acid, salt tolerant and the resistance to sour corrosion containing chloride is effective Fruit, the Sb amount the how then resistance to sulfuric acid higher, but can reduce to the toughness of hot-workability, steel plate and welding point.Therefore, originally The content of Sn 0.051%~0.119%, is controlled the content control of Sb 0.037%~0.089% by invention.
Mo: MoO is generated in aqueous solution4 2-Ion, to inhibit chloride permeability, so as to improve the corrosion resistance of antifreezing agent, but It is a large amount of containing being deteriorated sometimes to the corrosion resistance of sulfuric acid, also can impaired low temperature toughness, and form martensite in welding, cause to weld The brittle increase of connector inhibits chloride ion effect unobvious, while considering the increase of cost when a small amount of.Containing Mo in the present invention Amount control is 0.11%~0.19%.
B: in the corrosion-resistant element of the low melting point containing Sb, Cu, Sn, a certain amount of B, which is added, can play inhibition hot-working Property be deteriorated effect.When less than 0.0008%, enough effects are unable to get, if it exceeds 0.0019%, there is heat instead and adds The tendency that work is deteriorated.Therefore, when addition, it is desired for making content range 0.0008%~0.0019%.
Ca: making sulfide nodularization, may further ensure that the lateral extensibility of steel plate improves, improves cold roll forming performance. Ca processing is carried out after refining, Ca content has the function that 0.0008% can play nodularization sulfide, excessive Ca meeting Make sulfide coarsening, cause ductility reduction, therefore the present invention limits the upper limit of Ca content as 0.0030%, by Ca content control System is 0.0008%~0.0030%.
Another aspect of the present invention provides the manufacturing method of the anti-corrosion hot-rolled coil of the 700MPa grades of transporting coal open-top car, the side Method includes slab smelting, continuous casting, heating, rolling, cooling, batches, and specific production method includes:
(1) smelt continuous casting process: molten iron pretreatment, converter smelting-is through top blast or top bottom blowing, at LF furnace desulfurization Reason and ductility, toughness and the cold-bending property for carrying out Calcium treatment to control inclusion morphology with improve steel, continuous casting are stirred using electromagnetism Dynamic soft-reduction is mixed and stirred, to improve the quality of continuous casting steel billet.Converter procedure is added by the way of antimony slab after tapping, utilizes argon gas Be stirred, be completely melt alloy, ingredient it is uniform.Continuous casting billet with a thickness of 135~170mm, hence it is evident that be thinner than and mainly answer at present The thick continuous casting billet of 200mm or more, solidification cooling rate are far longer than traditional heavy slab, and secondary dendrite spacing is substantially Degree reduces.
(2) rolling mill practice: for the heated stove heating of continuous casting steel billet to 1228~1249 DEG C, it is reproducibility gas that steel atmosphere is burnt in heating Atmosphere, air-fuel ratio are lower than 2.0.Steel technology is burnt using high temperature, short time, guarantees that hot material bringing-up section and soaking zone time inside furnace are not more than 110min, to prevent low melting point element Cu, Sb and Sn in the precipitation of belt steel surface and caused by surface defect so that slab Surface low melting point Cu, Sb and Sn generate fine defects can be fully oxidized, and formation is loose easily to remove iron scale, to improve strip table Face quality.Roughing is carried out within the temperature range of being higher than 1100 DEG C, strip does not allow to swing, in 1000 DEG C~1100 DEG C beginning essences It rolls, finish rolling start rolling temperature is higher than 1100 DEG C, and finished product crystal grain is not easy to refine, and refined crystalline strengthening effect is bad；Lower than 1000 DEG C, strip tail Portion's cooling is fast, increases the load of finishing rolling mill, is easy to cause accident；In 830~895 DEG C of end rollings, it is specified that finishing temperature exists 830 DEG C or more, mill load can be kept excessive to avoid the rolling in coexistence region, and avoid the deformation temperature area that template is difficult to control Between, and can be reduced steel plate vertically and horizontally performance difference.But finishing temperature is higher than 895 DEG C, and crystal grain refinement is insufficient, influences strengthening effect. The preferred finishing temperature control of the present invention is at 831~878 DEG C.Section cooling is carried out after rolling, is batched.Coiling temperature is set in 580~650 DEG C, it is higher than 650 DEG C, fine grained texture is difficult to obtain after batching, strength and toughness is insufficient.Lower than 580 DEG C, it may appear that mistake The bainite transformation of amount, elongation percentage decline, influences processability.Coiling temperature of the present invention is preferably controlled in 581~637 DEG C, layer Stream concentrates cooling using leading portion.
The present invention produces the above method and produces transporting coal open-top car corrosion-resisting steel, and yield strength can reach 700MPa or more, resists Tensile strength is not less than 800MPa, and elongation percentage is not less than 17%, and -40 DEG C of impact flexibility are not less than 60J, and clod wash is qualified.According to TB/ T2375-93, in 45 ± 2 DEG C, 70% ± 5%RH, 0.01mol/LNaHSO3Under the conditions of testing 72h in solution, relative to Q345B Corrosion rate is less than 55%.According to JB/T 7901-1999, at room temperature, 20%H2SO4It is soaked entirely in+3.5%NaCl solution for 24 hours, Relative to Q345B corrosion rate less than 4%.
The utility model has the advantages that
The present invention compared with the existing technology, has the beneficial effect that:
(1) it is added simultaneously using a variety of alloying elements, especially the synergistic effect of Cr, Cu, Sb and Sn, there are also Nb, Ti, Mo Achieved the effect that high-intensitive and anti-corrosion with the booster action of the elements such as B by a small amount of polynary effect of alloying element.
(2) using continuous casting steel billet with a thickness of 135~170mm, using short route casting and rolling process, using high temperature, short time Fast-firing technique, it is high-efficient, save the energy.
(3) steel plate not only has good atmospheric corrosion resistance, but also has excellent medium corrosion resistance energy.By this The 700MPa grade transporting coal open-top car corrosion resistant plate for inventing production, relative to weathering steel currently in use, atmospheric corrosion resistance Can be with it quite, but medium corrosion resistance can significantly improve, the corrosive environment that especially resistance to sulfuric acid and chloride ion coexist can mention The service life of high transporting coal open-top car in the presence of a harsh environment, is greatly reduced vehicle maintenance cost.
Specific embodiment
For following embodiment for illustrating the content of present invention, these embodiments are only the general description of the content of present invention, The content of present invention is not limited.
The chemical component of steel embodiment of the present invention is shown in Table 1, and the rolling mill practice of steel embodiment of the present invention is shown in Table 2, steel of the present invention The mechanical property of embodiment is shown in Table 3.On the steel plate of Examples 1 to 10, the sample of 50 × 50 × 5mm, test method ginseng are intercepted Period soaking corrosion test, test period are carried out according to TB/T 2375-93 " railway weathering steel alternate-immersion test method " standard The atmospheric corrosion resistance of 72h, steel embodiment of the present invention the results are shown in Table 4；On the steel plate of Examples 1 to 10, interception 50 × 25 The sample of × 5mm, test method are marked referring to JB/T 7901-1999 " Uniform Corrosion Method of Laboratory Immersion Test method " Standard carries out 20%H2SO4The soak test of+3.5%NaCl, test period for 24 hours, the resistance to 20%H of steel embodiment of the present invention2SO4+ 3.5%NaCl corrosion test result is shown in Table 5.
The chemical component (wt%) of the steel embodiment of the present invention of table 1
The rolling mill practice of 2 steel of the embodiment of the present invention of table
The mechanical property of 3 steel of the embodiment of the present invention of table
4 steel atmospheric corrosion resistance test result of the embodiment of the present invention of table
Steel grade Relatively corrosive rate/%
Embodiment 1 53
Embodiment 2 54
Embodiment 3 51
Embodiment 4 52
Embodiment 5 55
Embodiment 6 53
Embodiment 7 50
Embodiment 8 51
Embodiment 9 53
Embodiment 10 52
Q700NQR1 54
Q345B 100
Note: straight carbon steel Q345B is contrast sample.
The 5 resistance to 20%H of steel of the embodiment of the present invention of table2SO4+ 3.5%NaCl corrosion test result
Steel grade Relatively corrosive rate/%
Embodiment 1 2.32
Embodiment 2 2.46
Embodiment 3 3.24
Embodiment 4 2.19
Embodiment 5 3.02
Embodiment 6 2.95
Embodiment 7 3.15
Embodiment 8 2.18
Embodiment 9 2.26
Embodiment 10 3.07
Q700NQR1 14.4
Q345B 100
Note: straight carbon steel Q345B and high-strength weathering steel Q700NQR1 is contrast sample.
By table 1~5 as it can be seen that the transporting coal open-top car corrosion-resisting steel produced using technical solution of the present invention, yield strength are reached 700MPa or more, atmospheric corrosion resistance is suitable with existing high-strength weathering steel Q700NQR1, resistance to SO42-+Cl-Corrosive effect is obvious Better than existing high-strength weathering steel and straight carbon steel Q345B, not only there is good atmospheric corrosion resistance, but also with excellent resistance to Corrosive nature under sulfuric acid and chloride ion coexisted environment, meanwhile, steel plate also has high intensity, excellent processability and low temperature tough Property, it is suitable for the manufacture of transporting coal open-top car.

Claims (4)

1. a kind of yield strength 700MPa grades of transporting coals open-top car corrosion-resisting steel, which is characterized in that chemical component presses quality percentage in steel Than are as follows: C:0.055%~0.079%, Si:0.21%~0.29%, Mn:1.41%~1.69%, P≤0.018%, S≤ 0.006%, Als:0.015%~0.045%, Cr:0.51%~0.99%, Ni:0.11%~0.19%, Cu:0.29%~ 0.46%, Nb:0.041%~0.062%, Ti:0.017%~0.042%, Sb:0.051%~0.119%, Sn:0.037% ~0.089%, Mo:0.11%~0.19%, B:0.0008%~0.0019%, Ca:0.0008%~0.0030%, surplus are Iron and inevitable impurity.
2. yield strength 700MPa grades of transporting coals open-top car corrosion-resisting steel according to claim 1, it is characterised in that the thickness of steel plate Degree is 3.0~6.0mm.
3. a kind of manufacturing method of yield strength 700MPa grades of transporting coals open-top car corrosion-resisting steel as claimed in claim 1 or 2, steel plate Production technology are as follows: slab smelting, heating, rolling, cooling, is batched continuous casting, it is characterised in that:
(1) continuous casting process is smelted: through molten iron pretreatment, converter smelting, LF furnace desulfurization process and Calcium treatment；Continuous casting is stirred using electromagnetism It mixes or dynamic soft-reduction, converter procedure is added by the way of antimony slab after tapping, is stirred using argon gas；The thickness of continuous casting billet For 135~170mm；
(2) rolling mill practice: for the heated stove heating of continuous casting steel billet to 1228~1249 DEG C, it is reducing atmosphere that steel atmosphere is burnt in heating, Air-fuel ratio is lower than 2.0；Hot material bringing-up section and soaking zone time inside furnace are not more than 110min；
Roughing temperature is higher than 1100 DEG C, and finish rolling start rolling temperature is 1000~1100 DEG C, and finish rolling finishing temperature is 830~895 DEG C, rolls Section cooling is carried out after system, is batched, and for oiler temperature control at 580~650 DEG C, laminar flow concentrates cooling using leading portion.
4. the manufacturing method of yield strength 700MPa grades of transporting coals open-top car corrosion-resisting steel according to claim 3, feature exist In the finish rolling finishing temperature control is at 831~878 DEG C, and the oiler temperature control is at 581~637 DEG C.
CN201910110947.0A 2019-02-12 2019-02-12 Corrosion-resistant steel with yield strength of 700MPa for coal transportation open wagon and manufacturing method thereof Active CN109628844B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201910110947.0A CN109628844B (en) 2019-02-12 2019-02-12 Corrosion-resistant steel with yield strength of 700MPa for coal transportation open wagon and manufacturing method thereof

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201910110947.0A CN109628844B (en) 2019-02-12 2019-02-12 Corrosion-resistant steel with yield strength of 700MPa for coal transportation open wagon and manufacturing method thereof

Publications (2)

Publication Number Publication Date
CN109628844A true CN109628844A (en) 2019-04-16
CN109628844B CN109628844B (en) 2020-05-29

Family

ID=66065077

Family Applications (1)

Application Number Title Priority Date Filing Date
CN201910110947.0A Active CN109628844B (en) 2019-02-12 2019-02-12 Corrosion-resistant steel with yield strength of 700MPa for coal transportation open wagon and manufacturing method thereof

Country Status (1)

Country Link
CN (1) CN109628844B (en)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111172463A (en) * 2020-02-17 2020-05-19 本钢板材股份有限公司 Acid corrosion resistant BGNS440 steel hot-rolled coil and preparation method thereof
CN111424211A (en) * 2020-04-30 2020-07-17 鞍钢股份有限公司 Weather-resistant steel for wide 700 MPa-grade hot-rolled container and manufacturing method thereof
CN112522617A (en) * 2020-11-23 2021-03-19 首钢集团有限公司 Steel for scaffold and preparation method thereof
CN113564486A (en) * 2021-06-28 2021-10-29 武汉钢铁有限公司 Antimony-containing acid corrosion-resistant steel with yield strength of 500MPa and preparation method thereof
CN115652209A (en) * 2022-11-07 2023-01-31 鞍钢股份有限公司 650MPa grade sulfuric acid dew point corrosion resistant rare earth steel and manufacturing method thereof

Citations (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101041883A (en) * 2006-03-22 2007-09-26 宝山钢铁股份有限公司 Seawater and humid environment corrosion resistant steel
CN102264937A (en) * 2008-12-24 2011-11-30 杰富意钢铁株式会社 Corrosion-resistant steel material for crude oil tanker
CN102268613A (en) * 2010-06-07 2011-12-07 鞍钢股份有限公司 Atmospheric corrosion resistant hot rolled steel plate for wagon and manufacturing method thereof
CN102899570A (en) * 2011-07-27 2013-01-30 株式会社神户制钢所 Steel material with excellent corrosion resistance for tank upper deck of crude oil tanker or for hold of bulk carrier
CN103045969A (en) * 2012-12-25 2013-04-17 钢铁研究总院 Coating-free corrosion-resistant steel
CN103882311A (en) * 2014-03-04 2014-06-25 南京钢铁股份有限公司 Low-alloy steel plate with excellent hydrochloric acid and sulfuric acid corrosion resistance, and production method thereof
CN104195461A (en) * 2014-09-10 2014-12-10 首钢总公司 Corrosion-resistant steel capable of being used on upper deck and inner bottom plate for cargo oil tank of crude oil tanker simultaneously
CN104451457A (en) * 2014-11-20 2015-03-25 南京钢铁股份有限公司 Hot rolled steel strip with resistance to corrosion of hydrochloric acid and sulfuric acid and production method thereof
CN104928602A (en) * 2015-06-25 2015-09-23 江苏省沙钢钢铁研究院有限公司 H-resistant cable2S-corrosion pipeline steel wide and thick plate and production method thereof
CN105132807A (en) * 2015-10-10 2015-12-09 武汉钢铁(集团)公司 Pipeline steel excellent in acid corrosion resistance on seabed and production method
CN105239023A (en) * 2015-11-18 2016-01-13 钢铁研究总院 High-temperature acid chloride ion corrosion resistant steel plate and manufacturing method thereof
CN105543705A (en) * 2016-01-19 2016-05-04 天津钢管集团股份有限公司 Manufacturing method for large-strain-resistant corrosion-resistant seamless line pipe for marine environment R-Lay laying
CN106414784A (en) * 2014-03-28 2017-02-15 日新制钢株式会社 Steel plate having excellent acid dew point corrosion resistance, method of production, and exhaust gas channel constituent member
CN107653423A (en) * 2017-08-31 2018-02-02 武汉钢铁有限公司 The water of resistance to coal erosion corrosion steel plate and its manufacture method for jimmy
CN109082594A (en) * 2018-09-04 2018-12-25 鞍钢股份有限公司 Acid soil corrosion resistant steel for buried structure and manufacturing method thereof

Patent Citations (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101041883A (en) * 2006-03-22 2007-09-26 宝山钢铁股份有限公司 Seawater and humid environment corrosion resistant steel
CN102264937A (en) * 2008-12-24 2011-11-30 杰富意钢铁株式会社 Corrosion-resistant steel material for crude oil tanker
CN102268613A (en) * 2010-06-07 2011-12-07 鞍钢股份有限公司 Atmospheric corrosion resistant hot rolled steel plate for wagon and manufacturing method thereof
CN102899570A (en) * 2011-07-27 2013-01-30 株式会社神户制钢所 Steel material with excellent corrosion resistance for tank upper deck of crude oil tanker or for hold of bulk carrier
CN103045969A (en) * 2012-12-25 2013-04-17 钢铁研究总院 Coating-free corrosion-resistant steel
CN103882311A (en) * 2014-03-04 2014-06-25 南京钢铁股份有限公司 Low-alloy steel plate with excellent hydrochloric acid and sulfuric acid corrosion resistance, and production method thereof
CN106414784A (en) * 2014-03-28 2017-02-15 日新制钢株式会社 Steel plate having excellent acid dew point corrosion resistance, method of production, and exhaust gas channel constituent member
CN104195461A (en) * 2014-09-10 2014-12-10 首钢总公司 Corrosion-resistant steel capable of being used on upper deck and inner bottom plate for cargo oil tank of crude oil tanker simultaneously
CN104451457A (en) * 2014-11-20 2015-03-25 南京钢铁股份有限公司 Hot rolled steel strip with resistance to corrosion of hydrochloric acid and sulfuric acid and production method thereof
CN104928602A (en) * 2015-06-25 2015-09-23 江苏省沙钢钢铁研究院有限公司 H-resistant cable2S-corrosion pipeline steel wide and thick plate and production method thereof
CN105132807A (en) * 2015-10-10 2015-12-09 武汉钢铁(集团)公司 Pipeline steel excellent in acid corrosion resistance on seabed and production method
CN105239023A (en) * 2015-11-18 2016-01-13 钢铁研究总院 High-temperature acid chloride ion corrosion resistant steel plate and manufacturing method thereof
CN105543705A (en) * 2016-01-19 2016-05-04 天津钢管集团股份有限公司 Manufacturing method for large-strain-resistant corrosion-resistant seamless line pipe for marine environment R-Lay laying
CN107653423A (en) * 2017-08-31 2018-02-02 武汉钢铁有限公司 The water of resistance to coal erosion corrosion steel plate and its manufacture method for jimmy
CN109082594A (en) * 2018-09-04 2018-12-25 鞍钢股份有限公司 Acid soil corrosion resistant steel for buried structure and manufacturing method thereof

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111172463A (en) * 2020-02-17 2020-05-19 本钢板材股份有限公司 Acid corrosion resistant BGNS440 steel hot-rolled coil and preparation method thereof
CN111424211A (en) * 2020-04-30 2020-07-17 鞍钢股份有限公司 Weather-resistant steel for wide 700 MPa-grade hot-rolled container and manufacturing method thereof
CN112522617A (en) * 2020-11-23 2021-03-19 首钢集团有限公司 Steel for scaffold and preparation method thereof
CN113564486A (en) * 2021-06-28 2021-10-29 武汉钢铁有限公司 Antimony-containing acid corrosion-resistant steel with yield strength of 500MPa and preparation method thereof
CN113564486B (en) * 2021-06-28 2022-06-03 武汉钢铁有限公司 Antimony-containing acid corrosion-resistant steel with yield strength of 500MPa and preparation method thereof
CN115652209A (en) * 2022-11-07 2023-01-31 鞍钢股份有限公司 650MPa grade sulfuric acid dew point corrosion resistant rare earth steel and manufacturing method thereof

Also Published As

Publication number Publication date
CN109628844B (en) 2020-05-29

Similar Documents

Publication Publication Date Title
CN110318006B (en) Cold-rolled weathering steel and preparation method thereof
CN109628843A (en) Corrosion-resistant steel with yield strength of 450MPa for coal transportation truck and manufacturing method thereof
CN109628844A (en) Corrosion-resistant steel with yield strength of 700MPa for coal transportation open wagon and manufacturing method thereof
CN112301276B (en) Manufacturing method of high-strength and high-weather-resistance cold-rolled dual-phase weather-resistant steel
CN109576591B (en) 700 MPa-grade cold-rolled corrosion-resistant dual-phase steel and manufacturing method thereof
CN109628841A (en) Corrosion-resistant steel with yield strength of 350MPa for coal transportation open wagon and manufacturing method thereof
CN109628840B (en) 550 MPa-grade cold-rolled corrosion-resistant dual-phase steel and manufacturing method thereof
CN109628842A (en) Corrosion-resistant steel with yield strength of 550MPa for coal transportation open wagon and manufacturing method thereof
CN110551946B (en) Production method of economical 350 MPa-grade high-toughness structural steel
CN110317936A (en) A kind of motor train compartment shell cold rolling weather resisting steel and preparation method thereof
CN109609845A (en) A kind of 500MPa grades of weathering steel and its production method
CN106834944A (en) A kind of ocean engineering low-temperature-resistance high-toughness hot-rolled angle steel and its manufacture method
CN109112429A (en) FH550 grade thick plate with excellent low-temperature toughness and manufacturing method thereof
CN108004488B (en) Marine climate-resistant high-toughness bridge steel plate and production method thereof
CN107236909A (en) High intensity, high tenacity corrosion resistant steel and its production method available for 60 DEG C of low temperature environments
CN112695247A (en) Stress corrosion resistant low-alloy high-strength steel for ocean engineering and preparation method thereof
CN110093563B (en) Enamel cold-rolled steel plate for deep drawing and production method thereof
CN111101068A (en) Low-nickel-content atmospheric corrosion resistant steel and preparation method thereof
CN109097681A (en) A kind of high intensity is low to be mingled with autobody sheet and its continuous casting process electromagnetic agitation technique
CN112941424A (en) Novel corrosion-resistant steel for railway vehicle and manufacturing method thereof
CN110284073A (en) A kind of oxygen content exposed can use corrosion resistant bridge steel and production method not less than 0.004%
CN114231703B (en) Production method of high-strength simplified annealed cold heading steel
CN114941108A (en) 890 MPa-grade coating-free atmospheric corrosion resistant bridge steel and preparation method thereof
CN114574782A (en) 450 MPa-grade wear-resistant corrosion-resistant steel and manufacturing method thereof
CN110747390B (en) High-strength corrosion-resistant steel for ships and preparation method thereof

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
GR01 Patent grant
GR01 Patent grant