CN114959475A - Channel steel with high yield strength for bridge and preparation method thereof - Google Patents
Channel steel with high yield strength for bridge and preparation method thereof Download PDFInfo
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- CN114959475A CN114959475A CN202210590831.3A CN202210590831A CN114959475A CN 114959475 A CN114959475 A CN 114959475A CN 202210590831 A CN202210590831 A CN 202210590831A CN 114959475 A CN114959475 A CN 114959475A
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- 229910000831 Steel Inorganic materials 0.000 title claims abstract description 51
- 239000010959 steel Substances 0.000 title claims abstract description 51
- 238000002360 preparation method Methods 0.000 title description 10
- 238000005096 rolling process Methods 0.000 claims abstract description 24
- 238000001816 cooling Methods 0.000 claims abstract description 15
- 238000010438 heat treatment Methods 0.000 claims abstract description 15
- 238000004519 manufacturing process Methods 0.000 claims abstract description 14
- 238000005098 hot rolling Methods 0.000 claims abstract description 6
- 238000003723 Smelting Methods 0.000 claims description 20
- 238000005242 forging Methods 0.000 claims description 15
- 238000001035 drying Methods 0.000 claims description 9
- 238000007670 refining Methods 0.000 claims description 9
- 238000000034 method Methods 0.000 claims description 7
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims description 6
- 239000000463 material Substances 0.000 claims description 6
- 239000007789 gas Substances 0.000 claims description 5
- 238000009740 moulding (composite fabrication) Methods 0.000 claims description 5
- 230000008569 process Effects 0.000 claims description 5
- 238000007664 blowing Methods 0.000 claims description 3
- 230000007547 defect Effects 0.000 claims description 3
- 238000010891 electric arc Methods 0.000 claims description 3
- 230000006698 induction Effects 0.000 claims description 3
- 238000011068 loading method Methods 0.000 claims description 3
- 229910052757 nitrogen Inorganic materials 0.000 claims description 3
- 230000003647 oxidation Effects 0.000 claims description 3
- 238000007254 oxidation reaction Methods 0.000 claims description 3
- 239000000843 powder Substances 0.000 claims description 3
- 230000009467 reduction Effects 0.000 claims description 3
- 238000002791 soaking Methods 0.000 claims description 3
- 239000007921 spray Substances 0.000 claims description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 3
- 229910052799 carbon Inorganic materials 0.000 abstract description 8
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 abstract description 7
- 238000005728 strengthening Methods 0.000 abstract description 6
- 229910052720 vanadium Inorganic materials 0.000 abstract description 6
- LEONUFNNVUYDNQ-UHFFFAOYSA-N vanadium atom Chemical compound [V] LEONUFNNVUYDNQ-UHFFFAOYSA-N 0.000 abstract description 6
- 229910000756 V alloy Inorganic materials 0.000 abstract description 3
- 229910045601 alloy Inorganic materials 0.000 abstract description 3
- 239000000956 alloy Substances 0.000 abstract description 3
- 230000008859 change Effects 0.000 abstract description 3
- 230000007246 mechanism Effects 0.000 abstract description 3
- 238000001556 precipitation Methods 0.000 abstract description 3
- 230000009471 action Effects 0.000 abstract description 2
- 229910052751 metal Inorganic materials 0.000 description 6
- 239000002184 metal Substances 0.000 description 6
- 230000007797 corrosion Effects 0.000 description 2
- 238000005260 corrosion Methods 0.000 description 2
- 229910000746 Structural steel Inorganic materials 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 238000004886 process control Methods 0.000 description 1
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
- B21B1/08—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 structural sections, i.e. work of special cross-section, e.g. angle steel
- B21B1/088—H- or I-sections
- B21B1/0883—H- or I-sections using forging or pressing devices
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B37/00—Control devices or methods specially adapted for metal-rolling mills or the work produced thereby
- B21B37/74—Temperature control, e.g. by cooling or heating the rolls or the product
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21J—FORGING; HAMMERING; PRESSING METAL; RIVETING; FORGE FURNACES
- B21J5/00—Methods for forging, hammering, or pressing; Special equipment or accessories therefor
- B21J5/002—Hybrid process, e.g. forging following casting
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22B—PRODUCTION AND REFINING OF METALS; PRETREATMENT OF RAW MATERIALS
- C22B9/00—General processes of refining or remelting of metals; Apparatus for electroslag or arc remelting of metals
- C22B9/16—Remelting metals
- C22B9/18—Electroslag remelting
-
- 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
- C22C38/04—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
- C22C38/20—Ferrous alloys, e.g. steel alloys containing chromium 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
- C22C38/26—Ferrous alloys, e.g. steel alloys containing chromium 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
- C22C38/28—Ferrous alloys, e.g. steel alloys containing chromium 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
- C22C38/38—Ferrous alloys, e.g. steel alloys containing chromium with more than 1.5% by weight of manganese
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P10/00—Technologies related to metal processing
- Y02P10/20—Recycling
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Manufacturing & Machinery (AREA)
- Heat Treatment Of Steel (AREA)
Abstract
The invention relates to the technical field of channel steel, and discloses a channel steel with high yield strength for a bridge, which is characterized in that the channel steel comprises the following elements in percentage by weight: c is less than or equal to 0.23 to 0.60 percent; si is less than or equal to 0.15 to 0.40 percent; mn: 1.00% -1.60%; p is less than or equal to 0.030 percent; s is less than or equal to 0.030 percent; nb is less than or equal to 0.07 percent; AL: 0.045-4.50%; ti is less than or equal to 0.60 percent; cr is less than or equal to 0.60 percent; cu is less than or equal to 0.40 percent; the invention reasonably controls the carbon component, fully utilizes the action of carbon to improve the strength and the hardness of the channel steel for the bridge and realizes low-cost production; the micro V alloy is added, the fine grain strengthening and precipitation strengthening mechanism of vanadium is applied, the influence of vanadium on the phase change characteristic after hot rolling is extremely small, the precision rolling temperature range is wide, controlled rolling and controlled cooling are not needed, heat treatment is not needed after rolling, the component design and production of the high-yield-strength bridge channel steel are completed, and the alloy cost in the production process is reduced.
Description
Technical Field
The invention relates to the technical field of special channel steel, in particular to channel steel with high yield strength for a bridge and a preparation method thereof.
Background
The channel steel is a long steel bar with a groove-shaped section, belongs to carbon structural steel for construction and machinery, is a steel bar with a complex section, has a groove-shaped section, and is mainly used for building structures, curtain wall engineering, mechanical equipment, vehicle manufacturing and the like.
The existing channel steel for the bridge has the strength as high as possible so as to ensure the safety of the whole bridge during bearing, however, in order to achieve the aim, a low-carbon and microalloy process is usually adopted, and an aluminum deoxidation and stopper rod wrapping process is used in a matching manner so as to ensure the high strength and the high toughness of a product, so that the production cost is greatly increased, and the process control is complex and is not beneficial to efficient production.
Disclosure of Invention
In view of the above technical problems, the present invention aims to provide a channel steel for a bridge with high yield strength and a preparation method thereof.
In order to achieve the purpose of the invention, the channel steel with high yield strength for the bridge comprises the following elements in percentage by weight: c is less than or equal to 0.23 to 0.60 percent; si is less than or equal to 0.15 to 0.40 percent; mn: 1.00% -1.60%; p is less than or equal to 0.030 percent; s is less than or equal to 0.030 percent; nb is less than or equal to 0.07 percent; AL: 0.045-4.50%; ti is less than or equal to 0.60 percent; cr is less than or equal to 0.60 percent; cu is less than or equal to 0.40 percent; the balance being Fe.
Preferably, the channel steel comprises the following elements in percentage by weight: c: 0.55 percent; si: 0.38 percent; mn: 1.42 percent; p: 0.024%; s: 0.021%; nb: 0.01 percent; AL: 0.065%; ti: 0.50 percent; cr: 0.10 percent; cu: 0.25 percent; the balance being Fe.
Preferably, the channel steel comprises the following elements in percentage by weight: c: 0.38 percent; si is less than or equal to 0.18 percent; mn: 1.51 percent; p: 0.016 percent; s: 0.009%; nb: 0.06 percent; AL: 2.50 percent; ti: 0.30 percent; cr: 0.27 percent; cu: 0.30 percent; the balance being Fe.
Preferably, the channel steel comprises the following elements in percentage by weight: c: 0.44%; si: 0.29 percent; mn: 1.19 percent; p: 0.020%; s: 0.019%; nb: 0.02 percent; AL: 4.40 percent; ti: 0.40 percent; cr: 0.49 percent; cu: 0.20 percent; the balance being Fe.
A preparation method of a channel steel with high yield strength for a bridge comprises the following steps:
a. smelting of
The materials are added into an electric arc furnace in sequence and then are electrified and heated to be melted.
b. Refining
After the molten steel in the primary smelting furnace is put into the furnace, Ar + O2 or N2+ O2 mixed gas is blown into the furnace, the blowing process is divided into an oxidation period, a reduction period and a refining period, and the temperature of the molten steel in the refining period is controlled at 1660 +/-10 ℃;
c. electroslag remelting
After removing surface defects of the refined cast ingot by electroslag remelting, smelting by using a vacuum induction furnace, wherein the electrode size smelting voltage is 56-58V, the smelting current is 7100-7500A, Mn powder is added during smelting, and high-purity nitrogen is introduced to form the cast ingot;
d. forging
(1) Loading the ingot into a furnace, wherein the forging heating temperature is 1160-;
(2) the forging temperature is more than or equal to 1160 ℃, the finish forging temperature is more than or equal to 960 ℃, and the forging is carried out for 52 square in a split fire manner.
e. Hot rolling
Heating in a heating furnace, wherein the soaking temperature of the heating furnace is 1160-1260 ℃, the initial rolling temperature is not lower than 1160 ℃, the final rolling temperature is not higher than 960 ℃, and the straightening temperature of the rolled material is less than 120 ℃ in a cooling bed by adopting a cooling mode of natural cooling and water spray cooling.
f. Roll forming
(1) Drying the round steel wire obtained in the step e at the drying temperature of 65 +/-5 ℃;
(2) and (4) after drying, rolling and forming the wire by a four-roller forming rolling mill for multiple times, and rolling into an I shape.
Compared with the prior art, the channel steel with high yield strength for the bridge and the preparation method thereof have the following advantages:
1. the channel steel with high yield strength for the bridge and the preparation method thereof have the advantages that the carbon component is reasonably controlled, the strength and the hardness of the channel steel for the bridge are improved by fully utilizing the carbon effect, and the low-cost production is realized.
2. According to the bridge channel steel with high yield strength and the preparation method thereof, a trace amount of V alloy is added, the fine grain strengthening and precipitation strengthening mechanism of vanadium is applied, the influence of vanadium on the phase change characteristic after hot rolling is extremely small, the finish rolling temperature range is wide, controlled rolling and controlled cooling are not needed, heat treatment is not needed after rolling, the component design and production of the bridge channel steel with high yield strength are completed, and the alloy cost in the production process is reduced.
3. According to the channel steel with high yield strength for the bridge and the preparation method thereof, electroslag remelting is adopted after smelting, the purity of metal can be improved through electroslag remelting, and the problem that the corrosion resistance of the special-shaped channel steel is influenced due to the fact that the metal is oxidized by gas in the metal is avoided.
Drawings
None.
Detailed Description
In order to further understand the objects, structures, features, and functions of the present invention, the following embodiments are described in detail.
Example 1:
a bridge channel steel with high yield strength comprises the following components in percentage by weight: c: 0.55 percent; si: 0.38 percent; mn: 1.42 percent; p: 0.024%; s: 0.021%; nb: 0.01 percent; AL: 0.065%; ti: 0.50 percent; cr: 0.10 percent; cu: 0.25 percent; the balance being Fe.
Example 2:
a bridge channel steel with high yield strength comprises the following components in percentage by weight: c: 0.38 percent; si is less than or equal to 0.18 percent; mn: 1.51 percent; p: 0.016 percent; s: 0.009%; nb: 0.06 percent; AL: 2.50 percent; ti: 0.30 percent; cr: 0.27 percent; cu: 0.30 percent; the balance being Fe.
Example 3:
a bridge channel steel with high yield strength comprises the following components in percentage by weight: c: 0.44%; si: 0.29 percent; mn: 1.19 percent; p: 0.020%; s: 0.019%; nb: 0.02 percent; AL: 4.40 percent; ti: 0.40 percent; cr: 0.49 percent; cu: 0.20 percent; the balance being Fe.
A preparation method of a channel steel with high yield strength for a bridge comprises the following steps:
a. smelting
The materials are added into an electric arc furnace in sequence and then are electrified and heated to be melted.
b. Refining
After the molten steel in the primary smelting furnace is put into the furnace, Ar + O2 or N2+ O2 mixed gas is blown into the furnace, the blowing process is divided into an oxidation period, a reduction period and a refining period, and the temperature of the molten steel in the refining period is controlled at 1660 +/-10 ℃;
c. electroslag remelting
After removing surface defects of the refined cast ingot by electroslag remelting, smelting by using a vacuum induction furnace, wherein the electrode size smelting voltage is 56-58V, the smelting current is 7100-7500A, Mn powder is added during smelting, and high-purity nitrogen is introduced to form the cast ingot;
d. forging
(1) Loading the ingot into a furnace, and keeping the temperature for more than or equal to 90min at the forging heating temperature of 1160-1260 ℃;
(2) the start forging temperature is more than or equal to 1160 ℃, the finish forging temperature is more than or equal to 960 ℃, and the split-fire forging is carried out for 52 square.
e. Hot rolling
Heating in a heating furnace, wherein the soaking temperature of the heating furnace is 1160-1260 ℃, the initial rolling temperature is not lower than 1160 ℃, the final rolling temperature is not higher than 960 ℃, and the straightening temperature of the rolled material is less than 120 ℃ in a cooling bed by adopting a cooling mode of natural cooling and water spray cooling.
f. Roll forming
(1) Drying the round steel wire obtained in the step e at the drying temperature of 65 +/-5 ℃;
(2) and (3) after drying, rolling and forming the wire rod for multiple times by a four-roller forming rolling mill, and rolling into an I shape.
According to the invention, the carbon component is reasonably controlled, the strength and hardness of the channel steel for the bridge are improved by fully utilizing the action of carbon, and low-cost production is realized; the micro V alloy is added, the fine grain strengthening and precipitation strengthening mechanism of vanadium is applied, the influence of vanadium on the phase change property after hot rolling is extremely small, the precision rolling temperature range is wide, controlled rolling and controlled cooling are not needed, heat treatment is not needed after rolling, the component design and production of the high-yield-strength bridge channel steel are completed, and the alloy cost in the production process is reduced; after smelting, electroslag remelting is adopted, the purity of metal can be improved through the electroslag remelting, and the problem that the corrosion resistance of the special-shaped channel steel is influenced due to the fact that the metal is oxidized by gas in the metal is avoided.
The present invention has been described in relation to the above embodiments, which are only exemplary of the implementation of the present invention. It should be noted that the disclosed embodiments do not limit the scope of the invention. Rather, it is intended that all such modifications and variations be included within the spirit and scope of this invention.
Claims (5)
1. The channel steel with high yield strength for the bridge is characterized by comprising the following elements in percentage by weight: c is less than or equal to 0.23 to 0.60 percent; si is less than or equal to 0.15 to 0.40 percent; mn: 1.00% -1.60%; p is less than or equal to 0.030 percent; s is less than or equal to 0.030 percent; nb is less than or equal to 0.07 percent; AL: 0.045-4.50%; ti is less than or equal to 0.60 percent; cr is less than or equal to 0.60 percent; cu is less than or equal to 0.40 percent; the balance being Fe.
2. The channel steel with high yield strength for bridges as claimed in claim 1, wherein the channel steel comprises the following elements in percentage by weight: c: 0.55 percent; si: 0.38 percent; mn: 1.42 percent; p: 0.024%; s: 0.021%; nb: 0.01 percent; AL: 0.065%; ti: 0.50 percent; cr: 0.10 percent; cu: 0.25 percent; the balance being Fe.
3. The channel steel with high yield strength for bridges as claimed in claim 1, wherein the channel steel comprises the following elements in percentage by weight: c: 0.38 percent; si is less than or equal to 0.18 percent; mn: 1.51 percent; p: 0.016 percent; s: 0.009%; nb: 0.06 percent; AL: 2.50 percent; ti: 0.30 percent; cr: 0.27 percent; cu: 0.30 percent; the balance being Fe.
4. The channel steel with high yield strength for bridges as claimed in claim 1, wherein the channel steel comprises the following elements in percentage by weight: c: 0.44%; si: 0.29 percent; mn: 1.19 percent; p: 0.020%; s: 0.019%; nb: 0.02 percent; AL: 4.40 percent; ti: 0.40 percent; cr: 0.49 percent; cu: 0.20 percent; the balance being Fe.
5. The method for manufacturing a steel channel with high yield strength for bridges according to claim 1, wherein the method for manufacturing the steel channel comprises the following steps:
a. smelting
The materials are added into an electric arc furnace in sequence and then are electrified and heated to be melted.
b. Refining
After the molten steel in the primary smelting furnace is put into the furnace, Ar + O2 or N2+ O2 mixed gas is blown into the furnace, the blowing process is divided into an oxidation period, a reduction period and a refining period, and the temperature of the molten steel in the refining period is controlled at 1660 +/-10 ℃;
c. electroslag remelting
After removing surface defects of the refined cast ingot by electroslag remelting, smelting by using a vacuum induction furnace, wherein the electrode size smelting voltage is 56-58V, the smelting current is 7100-7500A, Mn powder is added during smelting, and high-purity nitrogen is introduced to form the cast ingot;
d. forging
(1) Loading the ingot into a furnace, wherein the forging heating temperature is 1160-;
(2) the forging temperature is more than or equal to 1160 ℃, the finish forging temperature is more than or equal to 960 ℃, and the forging is carried out for 52 square in a split fire manner.
e. Hot rolling
Heating in a heating furnace, wherein the soaking temperature of the heating furnace is 1160-1260 ℃, the initial rolling temperature is not lower than 1160 ℃, the final rolling temperature is not higher than 960 ℃, and the straightening temperature of the rolled material is less than 120 ℃ in a cooling bed by adopting a cooling mode of natural cooling and water spray cooling.
f. Roll forming
(1) Drying the round steel wire obtained in the step e at the drying temperature of 65 +/-5 ℃;
(2) and (3) after drying, rolling and forming the wire rod for multiple times by a four-roller forming rolling mill, and rolling into an I shape.
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2022
- 2022-05-27 CN CN202210590831.3A patent/CN114959475A/en active Pending
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