CN109023093A - A kind of high strength steel and preparation method thereof - Google Patents

A kind of high strength steel and preparation method thereof Download PDF

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Publication number
CN109023093A
CN109023093A CN201811052643.5A CN201811052643A CN109023093A CN 109023093 A CN109023093 A CN 109023093A CN 201811052643 A CN201811052643 A CN 201811052643A CN 109023093 A CN109023093 A CN 109023093A
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steel
high strength
strength steel
preparation
niobium
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陈更
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Taishan Yongfa Hardware Products Co Ltd
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Taishan Yongfa Hardware Products Co Ltd
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Priority to CN201811052643.5A priority Critical patent/CN109023093A/en
Publication of CN109023093A publication Critical patent/CN109023093A/en
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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
    • C21C7/06—Deoxidising, e.g. killing
    • 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
    • C21D8/005—Modifying the physical properties by deformation combined with, or followed by, heat treatment of ferrous alloys
    • 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
    • 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
    • C22C38/46—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
    • C22C38/48—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

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

Abstract

The invention discloses a kind of high strength steel and preparation method thereof, the chemical component of the high strength steel includes: carbon based on percentage: 0.005%-0.01%；Silicon: 0.3%-0.4%；Manganese: 0.8%-1.2%；Phosphorus: 0.01%-0.02%；Sulphur: 0.008%-0.01%；Aluminium: 0.1%-0.3%；Nitrogen: 0.002%-0.004%；Titanium: 0.02%-0.03%；Niobium: 0.1%-0.2%；Copper: 0.6%-0.9%；Nickel: 0.55%-0.95%；Chromium: 0.6%-0.9%；Vanadium: 0.55%-0.7%, remaining includes iron and a small amount of impurity.The steel joined titanium valve, ferrochrome and ferro-niobium, increase the intensity of steel, so that steel have high intensity, the bearing capacity of building can be improved, the steel using rare earth alloy, deoxidier is used as in calcium-silicon, it can guarantee the quality of the steel product in producing process, the preparation method of the steel is simple, production process is few, and production cost is low, solves existing steel preparation process aging, it is difficult to adapt to the problem of high strength steel production, so that the steel processed have, intensity is high, corrosion resistant feature, convenient for using to marketing.

Description

A kind of high strength steel and preparation method thereof
Technical field
The present invention relates to steel technical field, specifically a kind of high strength steel and preparation method thereof.
Background technique
Steel are the material of steel ingot, steel billet or the steel certain shapes made of pressure processing, size and performance, big portion The processing of steel splitting material is all so that processed steel (base, ingot etc.) is generated plastic deformation, according to steel processing temperature by pressure processing Difference can be divided into cold working and two kinds of hot-working.
But steel production process currently used in the market is on the high side, production cost is higher, increases the investment of enterprise, makes Steel strength is not generally high, will affect the house intensity of building, and the deoxidation of steel is not perfect, it cannot be guaranteed that adding The quality of steel product in work production technology.Therefore, those skilled in the art provide a kind of high strength steel and its preparation side Method, to solve the problems mentioned in the above background technology.
Summary of the invention
The purpose of the present invention is to provide a kind of high strength steels and preparation method thereof, to solve to mention in above-mentioned background technique Out the problem of.
To achieve the above object, the invention provides the following technical scheme:
A kind of high strength steel and preparation method thereof, the chemical component of the high strength steel includes: carbon based on percentage: 0.005%-0.01%；Silicon: 0.3%-0.4%；Manganese: 0.8%-1.2%；Phosphorus: 0.01%-0.02%；Sulphur: 0.008%-0.01%；Aluminium: 0.1%-0.3%；Nitrogen: 0.002%-0.004%；Titanium: 0.02%-0.03%；Niobium: 0.1%-0.2%；Copper: 0.6%-0.9%；Nickel: 0.55%- 0.95%；Chromium: 0.6%-0.9%；Vanadium: 0.55%-0.7%, remaining includes iron and a small amount of impurity.
As a further solution of the present invention: the chemical component of the high strength steel includes: carbon based on percentage: 0.007%-0.009%；Silicon: 0.35%；Manganese: 1%；Phosphorus: 0.015%；Sulphur: 0.01%；Aluminium: 0.25%；Nitrogen: 0.003%-0.004%；Titanium: 0.025%；Niobium: 0.15%；Copper: 0.7%-0.9%；Nickel: 0.7%-0.95%；Chromium: 0.7%-0.9%；Vanadium: 0.65%, remaining include iron and A small amount of impurity.
As the present invention further scheme: the preparation method the following steps are included:
A, molten iron pre-desulfurization: entering furnace molten iron arsenic content 80pmm, and the sulfur content in desulfurized molten iron is controlled in 0.008wt%- 0.01wt%。
B, converter smelting: using top and bottom combined blown converter smelting, and for heating and temperature control at 1200-1250 °C, heat preservation 1-2 is small When.
C, synthesis refining: whole Bottom Argon Stirring refines the soft blow time at least 15 minutes.
D, continuous casting: his whole molding casting.
E, mill-annealed: hot rolling start rolling temperature is at least 1150 °C, and finishing temperature is 950 °C -970 °C, and coiling temperature is 740 °C -780 °C, cold rolling reduction ratio is controlled in 75%-80%；The heating temperature of continuous annealing is 850 °C -910 °C, soaking time 80-160s, cooling rate are 30 °C -70 °C/s.
F, smooth: smooth reduction ratio is 0.5%-0.9%.
As the present invention further scheme: in the step of the converter smelting, deoxidier is added during putting steel, Deoxidier be one of rare earth alloy, calcium-silicon or it is a variety of mix, the content of deoxidier is 2.5kg-4.0kg/ tons.
As the present invention further scheme: in the converter smelting step, using silicomanganese, copper particle, nickel plate, titanium valve, Ferrochrome and ferro-niobium carry out alloying, and copper particle and nickel plate are added with furnace charge, remaining alloy adds in batches when molten steel goes out to a quarter Add, is added when molten steel goes out to 3/4ths.
As further scheme of the invention: stocking natural cooling on cold bed, rolled piece spacing are 1400mm- 1800mm。
Compared with prior art, the beneficial effects of the present invention are:
The steel joined titanium valve, ferrochrome and ferro-niobium, increase the intensity of steel, so that steel have high intensity, can be improved The bearing capacity of building reduces the self weight of steel, the steel using rare earth alloy, deoxidier, Neng Goubao are used as in calcium-silicon The quality of the steel product in producing process is demonstrate,proved, the preparation method of the steel is simple, and production process is few, and production cost is low, Solves existing steel preparation process aging, it is difficult to the problem of high strength steel production is adapted to, so that the steel processed Material has intensity height, corrosion resistant feature, convenient for using to marketing.
Detailed description of the invention
Fig. 1 is a kind of process frame diagram of high strength steel and preparation method thereof.
Specific embodiment
Embodiment 1:
Referring to Fig. 1, the chemical component of high strength steel includes: carbon based on percentage: 0.005%- in the embodiment of the present invention 0.01%；Silicon: 0.3%-0.4%；Manganese: 0.8%-1.2%；Phosphorus: 0.01%-0.02%；Sulphur: 0.008%-0.01%；Aluminium: 0.1%-0.3%； Nitrogen: 0.002%-0.004%；Titanium: 0.02%-0.03%；Niobium: 0.1%-0.2%；Copper: 0.6%-0.9%；Nickel: 0.55%-0.95%；Chromium: 0.6%-0.9%；Vanadium: 0.55%-0.7%, remaining includes iron and a small amount of impurity.
Preferably, the preparation method the following steps are included:
A, molten iron pre-desulfurization: entering furnace molten iron arsenic content 80pmm, and the sulfur content in desulfurized molten iron is controlled in 0.008wt%- 0.01wt%。
B, converter smelting: using top and bottom combined blown converter smelting, and for heating and temperature control at 1200-1250 °C, heat preservation 1-2 is small When.
C, synthesis refining: whole Bottom Argon Stirring refines the soft blow time at least 15 minutes.
D, continuous casting: his whole molding casting.
E, mill-annealed: hot rolling start rolling temperature is at least 1150 °C, and finishing temperature is 950 °C -970 °C, and coiling temperature is 740 °C -780 °C, cold rolling reduction ratio is controlled in 75%-80%；The heating temperature of continuous annealing is 850 °C -910 °C, soaking time 80-160s, cooling rate are 30 °C -70 °C/s.
F, smooth: smooth reduction ratio is 0.5%-0.9%.
Preferably, in the step of converter smelting, deoxidier is added during putting steel, deoxidier is rare earth alloy, silico-calcium One of alloy or it is a variety of mix, the content of deoxidier is 2.5kg-4.0kg/ tons.
Preferably, in converter smelting step, alloying, copper are carried out using silicomanganese, copper particle, nickel plate, titanium valve, ferrochrome and ferro-niobium Grain and nickel plate are added with furnace charge, remaining alloy is added batch-wise when molten steel goes out to a quarter, when molten steel goes out to 3/4ths It adds.
Preferably, stocking natural cooling on cold bed, rolled piece spacing are 1400mm-1800mm.
Embodiment 2:
Referring to Fig. 1, the chemical component of high strength steel includes: carbon based on percentage: 0.007%- in the embodiment of the present invention 0.009%；Silicon: 0.35%；Manganese: 1%；Phosphorus: 0.015%；Sulphur: 0.01%；Aluminium: 0.25%；Nitrogen: 0.003%-0.004%；Titanium: 0.025%； Niobium: 0.15%；Copper: 0.7%-0.9%；Nickel: 0.7%-0.95%；Chromium: 0.7%-0.9%；Vanadium: 0.65%, remaining includes iron and a small amount of miscellaneous Matter.
Preferably, the preparation method the following steps are included:
A, molten iron pre-desulfurization: entering furnace molten iron arsenic content 80pmm, and the sulfur content in desulfurized molten iron is controlled in 0.008wt%- 0.01wt%。
B, converter smelting: using top and bottom combined blown converter smelting, and for heating and temperature control at 1200-1250 °C, heat preservation 1-2 is small When.
C, synthesis refining: whole Bottom Argon Stirring refines the soft blow time at least 15 minutes.
D, continuous casting: his whole molding casting.
E, mill-annealed: hot rolling start rolling temperature is at least 1150 °C, and finishing temperature is 950 °C -970 °C, and coiling temperature is 740 °C -780 °C, cold rolling reduction ratio is controlled in 75%-80%；The heating temperature of continuous annealing is 850 °C -910 °C, soaking time 80-160s, cooling rate are 30 °C -70 °C/s.
F, smooth: smooth reduction ratio is 0.5%-0.9%.
Preferably, in the step of converter smelting, deoxidier is added during putting steel, deoxidier is rare earth alloy, silico-calcium One of alloy or it is a variety of mix, the content of deoxidier is 2.5kg-4.0kg/ tons.
Preferably, in converter smelting step, alloying, copper are carried out using silicomanganese, copper particle, nickel plate, titanium valve, ferrochrome and ferro-niobium Grain and nickel plate are added with furnace charge, remaining alloy is added batch-wise when molten steel goes out to a quarter, when molten steel goes out to 3/4ths It adds.
Preferably, stocking natural cooling on cold bed, rolled piece spacing are 1400mm-1800mm.
It is above-described, it is merely preferred embodiments of the present invention, but protection scope of the present invention is not limited to This, anyone skilled in the art in the technical scope disclosed by the present invention, according to the technique and scheme of the present invention And its inventive concept is subject to equivalent substitution or change, should be covered by the protection scope of the present invention.

Claims (6)

1. a kind of high strength steel, which is characterized in that the chemical component of the high strength steel includes: carbon based on percentage: 0.005%-0.01%；Silicon: 0.3%-0.4%；Manganese: 0.8%-1.2%；Phosphorus: 0.01%-0.02%；Sulphur: 0.008%-0.01%；Aluminium: 0.1%-0.3%；Nitrogen: 0.002%-0.004%；Titanium: 0.02%-0.03%；Niobium: 0.1%-0.2%；Copper: 0.6%-0.9%；Nickel: 0.55%- 0.95%；Chromium: 0.6%-0.9%；Vanadium: 0.55%-0.7%, remaining includes iron and a small amount of impurity.
2. a kind of high strength steel according to claim 1, which is characterized in that the chemical component of the high strength steel is pressed Percentage meter includes: carbon: 0.007%-0.009%；Silicon: 0.35%；Manganese: 1%；Phosphorus: 0.015%；Sulphur: 0.01%；Aluminium: 0.25%；Nitrogen: 0.003%-0.004%；Titanium: 0.025%；Niobium: 0.15%；Copper: 0.7%-0.9%；Nickel: 0.7%-0.95%；Chromium: 0.7%-0.9%；Vanadium: 0.65%, remaining includes iron and a small amount of impurity.
3. a kind of high strength steel according to claim 1 to 2 and preparation method thereof, which is characterized in that the preparation method packet Include following steps:
A, molten iron pre-desulfurization: entering furnace molten iron arsenic content 80pmm, and the sulfur content in desulfurized molten iron is controlled in 0.008wt%- 0.01wt%；
B, converter smelting: using top and bottom combined blown converter smelting, and heating and temperature control keeps the temperature 1-2 hours at 1200-1250 °C；
C, synthesis refining: whole Bottom Argon Stirring refines the soft blow time at least 15 minutes；
D, continuous casting: his whole molding casting；
E, mill-annealed: hot rolling start rolling temperature is at least 1150 °C, and finishing temperature is 950 °C -970 °C, and coiling temperature is 740 ° C-780 °C, cold rolling reduction ratio is controlled in 75%-80%；The heating temperature of continuous annealing is 850 °C -910 °C, soaking time 80- 160s, cooling rate are 30 °C -70 °C/s；
F, smooth: smooth reduction ratio is 0.5%-0.9%.
4. a kind of high strength steel according to claim 3 and preparation method thereof, which is characterized in that the converter smelting In step, add deoxidier during putting steel, deoxidier be one of rare earth alloy, calcium-silicon or a variety of mixing and At the content of deoxidier is 2.5kg-4.0kg/ tons.
5. a kind of high strength steel according to claim 3 and preparation method thereof, which is characterized in that the converter smelting step In rapid, alloying is carried out using silicomanganese, copper particle, nickel plate, titanium valve, ferrochrome and ferro-niobium, copper particle and nickel plate are added with furnace charge, remaining conjunction Gold is added batch-wise when molten steel goes out to a quarter, adds when molten steel goes out to 3/4ths.
6. a kind of high strength steel according to claim 1 and preparation method thereof, which is characterized in that the stocking is in cold bed Upper natural cooling, rolled piece spacing are 1400mm-1800mm.
CN201811052643.5A 2018-09-10 2018-09-10 A kind of high strength steel and preparation method thereof Pending CN109023093A (en)

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Cited By (1)

* Cited by examiner, † Cited by third party
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CN112095050A (en) * 2020-10-09 2020-12-18 新疆八一钢铁股份有限公司 Production method of low-alloy high-strength structural steel

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN112095050A (en) * 2020-10-09 2020-12-18 新疆八一钢铁股份有限公司 Production method of low-alloy high-strength structural steel
CN112095050B (en) * 2020-10-09 2021-08-27 新疆八一钢铁股份有限公司 Production method of low-alloy high-strength structural steel

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Application publication date: 20181218