CN107663611A - A kind of production method of inexpensive 490MPa levels hot rolling acid-cleaning plate - Google Patents
A kind of production method of inexpensive 490MPa levels hot rolling acid-cleaning plate Download PDFInfo
- Publication number
- CN107663611A CN107663611A CN201610608324.2A CN201610608324A CN107663611A CN 107663611 A CN107663611 A CN 107663611A CN 201610608324 A CN201610608324 A CN 201610608324A CN 107663611 A CN107663611 A CN 107663611A
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- CN
- China
- Prior art keywords
- hot rolling
- 490mpa
- rolling acid
- cleaning plate
- inexpensive
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Classifications
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/04—Ferrous alloys, e.g. steel alloys containing manganese
-
- C—CHEMISTRY; METALLURGY
- 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
- C21D6/00—Heat treatment of ferrous alloys
- C21D6/005—Heat treatment of ferrous alloys containing Mn
-
- 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
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/001—Ferrous alloys, e.g. steel alloys containing N
-
- 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
- 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
- C22C38/14—Ferrous alloys, e.g. steel alloys containing titanium or zirconium
Abstract
The present invention relates to hot rolling acid-cleaning plate field, specially a kind of production method of inexpensive 490MPa levels hot rolling acid-cleaning plate.By weight percentage, the alloying component of hot rolling acid-cleaning plate is C：0.05%~0.09%, Si≤0.35%, Mn：0.10%~0.50%, P≤0.020%, S≤0.015%, Als：0.015%~0.040%, Ti：0.050%~0.070%, N≤0.006%, surplus are iron and inevitable impurity；Strand is placed in walking beam furnace and heated, 40~80min is incubated at 1170~1270 DEG C, alloy is largely dissolved；Strand is come out of the stove after laggard horizontal high voltage water de-scaling, is rolled into roughing mill, 1080 DEG C~1150 DEG C of start rolling temperature；Base temperature >=950 DEG C among after roughing, subsequently enter mm finishing mill unit rolling, 820 DEG C~880 DEG C of finishing temperature；Batched after section cooling, 560 DEG C~650 DEG C of coiling temperature.Using the present invention can solve prior art production 490MPa level hot rolling acid-cleaning plate production costs it is too high, cause that the market competitiveness is poor, has a strong impact on the problems such as achievement of steel mill.
Description
Technical field
The present invention relates to hot rolling acid-cleaning plate field, specially a kind of producer of inexpensive 490MPa levels hot rolling acid-cleaning plate
Method.
Background technology
Hot rolling acid-cleaning plate is using high-quality SPHC as raw material, removes oxide layer, trimming, after finishing through pickling unit, table
The intermediate products of face quality and requirement (mainly cold roll forming or punching performance) between hot rolled plate and cold-reduced sheet.
490MPa level hot rolling acid-cleaning plates belong to low-alloy structural steel, the field such as traffic at home and abroad, building, machinery, vehicle
Extensive use.But the matching of 490MPa level hot rolling acid-cleaning plate Cost And Performances annoyings iron and steel enterprise always.Current domestic steel mill
Widely used carbon manganese and niobium are strengthened, and manganese content 1.10%~1.50%, content of niobium 0.01%~0.03%, cost is too high, market
Competitiveness is poor, has a strong impact on the achievement of steel mill.Simultaneously as the defects of composition design, cause to occur in steelmaking process
Angle transverse fissure, segregation, the problems such as manganese sulfide inclusion thing grade is high, banding is serious etc., have a strong impact on 490MPa level hot rolling acid-cleaning plates
Surface quality, internal soundness, mouldability, welding performance etc..Based on above reason, it is badly in need of a kind of new technology and solves problem above,
Produce low cost, the product of high quality.
The content of the invention
It is an object of the invention to provide a kind of production method of inexpensive 490MPa levels hot rolling acid-cleaning plate, solves prior art
The 490MPa level hot rolling acid-cleaning plate production costs of production are too high, cause achievement that the market competitiveness is poor, has a strong impact on steel mill etc.
Problem.Production cost is greatly reduced in the method that the present invention substitutes a large amount of manganese and niobium using high titanium, realization.
The technical scheme is that：
A kind of production method of inexpensive 490MPa levels hot rolling acid-cleaning plate, comprises the following steps：
1) hot rolling acid-cleaning plate alloy is smelted according to a conventional method, pours into strand；
By weight percentage, the alloying component of hot rolling acid-cleaning plate is C：0.05%~0.09%, Si≤0.35%, Mn：
0.10%~0.50%, P≤0.020%, S≤0.015%, Als：0.015%~0.040%, Ti：0.050%~
0.070%th, N≤0.006%, surplus are iron and inevitable impurity；
2) strand is placed in walking beam furnace and heated, be incubated 40~80min at 1170~1270 DEG C, make alloy a large amount of
Solid solution；Strand is come out of the stove after laggard horizontal high voltage water de-scaling, is rolled into roughing mill, 1080 DEG C~1150 DEG C of start rolling temperature；After roughing
Middle base temperature >=950 DEG C, subsequently enter mm finishing mill unit rolling, 820 DEG C~880 DEG C of finishing temperature；Batch, roll up after section cooling
Take 560 DEG C~650 DEG C of temperature.
The production method of described inexpensive 490MPa levels hot rolling acid-cleaning plate, the performance of hot rolling acid-cleaning plate meet tensile strength
>=490MPa, elongation after fracture >=23%.
The production method of described inexpensive 490MPa levels hot rolling acid-cleaning plate, it is preferred that by weight percentage, 490MPa
Level hot rolling acid-cleaning plate use high titanium low-cost alloy composition for：
C：0.07%th, Si：0.30%th, Mn：0.30%th, P：0.015%th, S：0.010%th, Als：0.025%th, Ti：
0.060%th, N：0.003%th, surplus is iron and inevitable impurity.
The production method of described inexpensive 490MPa levels hot rolling acid-cleaning plate, it is preferred that by weight percentage, 490MPa
Level hot rolling acid-cleaning plate use high titanium low-cost alloy composition for：
C：0.06%th, Si：0.25%th, Mn：0.15%th, P：0.012%th, S：0.008%th, Als：0.020%th, Ti：
0.050%th, N：0.005%th, surplus is iron and inevitable impurity.
The production method of described inexpensive 490MPa levels hot rolling acid-cleaning plate, it is preferred that by weight percentage, 490MPa
Level hot rolling acid-cleaning plate use high titanium low-cost alloy composition for：
C：0.08%th, Si：0.20%th, Mn：0.45%th, P：0.010%th, S：0.012%th, Als：0.035%th, Ti：
0.070%th, N：0.004%th, surplus is iron and inevitable impurity.
The present invention design philosophy be：
By weight percentage, the alloying component of conventional 490MPa levels hot rolling acid-cleaning plate is C：0.06%~0.12%,
Si：0.15%~0.35%, Mn：1.10%~1.50%, P≤0.020%, S≤0.020%, Als (dissolved aluminum)：0.010%
~0.040%, Nb：0.01%~0.03%, surplus is iron and inevitable impurity.With smelting technique and controlled rolling and controlled cooling skill
The reaching its maturity of art, theoretical gradual perfect of titaniferous Second Phase Precipitation in titanium micro-alloyed steel, and the economy of current ferrotianium, with
Ferro-niobium, vanadium iron have lower cost compared to the advantage in price using titanium microalloying.The effect of titanium be mainly reflected in as
Under several aspects：Titanium can be combined with nitrogen, carbon, form stable nitride, carbide, Austenite Grain Growth be prevented, so as to change
The welding performance of kind material；Sulfide in titanium energy modified steel, improve the difference and cold forming capability of the vertically and horizontally performance of material；
When Ti content is high (＞ 0.04%), with reference to suitable heat processing technique, the tiny titanium carbide of disperse can be formed, plays precipitation strength
Effect；Titanium has certain refined crystalline strengthening effect simultaneously.Therefore, it can realize that production is inexpensive, high-quality using high titanium technological design
The product of amount.
Advantages of the present invention and beneficial effect are：
1st, the cost of low-alloy high-strength steel is higher, is the main bugbear for perplexing factory always.Using low cost of the invention
The production method of the 490MPa level hot rolling acid-cleaning plates of technological design, production cost (ton steel reduces by 100 yuan) can be greatly reduced, simultaneously
Properties of product meet tensile strength >=490MPa requirement, and have good elongation percentage and welding performance.
2nd, the present invention effectively reduces banded structure, manganese sulfide inclusion using relatively low carbon, relatively low manganese and high titanium
Thing.Titanium nitrogen fixation simultaneously, reduces the generation of aluminium nitride, reduces the crack sensitivity in strand corner, effectively prevent from sticking up skin
The defects of produce.
Embodiment
Below, the present invention is further elaborated on by embodiment.
Embodiment 1
In the present embodiment, by weight percentage, 490MPa level hot rolling acid-cleaning plates use high titanium low-cost alloy composition for：
C：0.07%th, Si：0.30%th, Mn：0.30%th, P：0.015%th, S：0.010%th, Als (dissolved aluminum)：0.025%th,
Ti：0.060%th, N：0.003%th, surplus is iron and inevitable impurity.
In the present embodiment, the production method of inexpensive 490MPa levels hot rolling acid-cleaning plate is as follows：
1) 490MPa level hot rolling acid-cleaning plate alloys are smelted according to a conventional method, pour into strand；
2) strand is placed in walking beam furnace and heated, be incubated 60min at 1220 DEG C, alloy is largely dissolved；Strand
Come out of the stove after laggard horizontal high voltage water de-scaling, rolled into roughing mill, 1120 DEG C of start rolling temperature；1050 DEG C of base temperature among after roughing,
Subsequently enter mm finishing mill unit rolling, 850 DEG C of finishing temperature；Batched after section cooling, 600 DEG C of coiling temperature.Product tensile strength
526MPa, elongation after fracture 29%.
Embodiment 2
In the present embodiment, by weight percentage, 490MPa level hot rolling acid-cleaning plates use high titanium low-cost alloy composition for：
C：0.06%th, Si：0.25%th, Mn：0.15%th, P：0.012%th, S：0.008%th, Als (dissolved aluminum)：0.020%th,
Ti：0.050%th, N：0.005%th, surplus is iron and inevitable impurity.
In the present embodiment, the production method of inexpensive 490MPa levels hot rolling acid-cleaning plate is as follows：
1) 490MPa level hot rolling acid-cleaning plate alloys are smelted according to a conventional method, pour into strand；
2) strand is placed in walking beam furnace and heated, be incubated 70min at 1180 DEG C, alloy is largely dissolved；Strand
Come out of the stove after laggard horizontal high voltage water de-scaling, rolled into roughing mill, 1100 DEG C of start rolling temperature；1000 DEG C of base temperature among after roughing,
Subsequently enter mm finishing mill unit rolling, 840 DEG C of finishing temperature；Batched after section cooling, 630 DEG C of coiling temperature.Product tensile strength
512MPa, elongation after fracture 30%.
Embodiment 3
In the present embodiment, by weight percentage, 490MPa level hot rolling acid-cleaning plates use high titanium low-cost alloy composition for：
C：0.08%th, Si：0.20%th, Mn：0.45%th, P：0.010%th, S：0.012%th, Als (dissolved aluminum)：0.035%th,
Ti：0.070%th, N：0.004%th, surplus is iron and inevitable impurity.
In the present embodiment, the production method of inexpensive 490MPa levels hot rolling acid-cleaning plate is as follows：
1) 490MPa level hot rolling acid-cleaning plate alloys are smelted according to a conventional method, pour into strand；
2) strand is placed in walking beam furnace and heated, be incubated 50min at 1250 DEG C, alloy is largely dissolved；Strand
Come out of the stove after laggard horizontal high voltage water de-scaling, rolled into roughing mill, 1130 DEG C of start rolling temperature；1100 DEG C of base temperature among after roughing,
Subsequently enter mm finishing mill unit rolling, 860 DEG C of finishing temperature；Batched after section cooling, 580 DEG C of coiling temperature.Product tensile strength
537MPa, elongation after fracture 27%.
Claims (5)
1. a kind of production method of inexpensive 490MPa levels hot rolling acid-cleaning plate, it is characterised in that comprise the following steps：
1) hot rolling acid-cleaning plate alloy is smelted according to a conventional method, pours into strand；
By weight percentage, the alloying component of hot rolling acid-cleaning plate is C：0.05%~0.09%, Si≤0.35%, Mn：
0.10%~0.50%, P≤0.020%, S≤0.015%, Als：0.015%~0.040%, Ti：0.050%~
0.070%th, N≤0.006%, surplus are iron and inevitable impurity；
2) strand is placed in walking beam furnace and heated, 40~80min is incubated at 1170~1270 DEG C, make alloy largely solid
It is molten；Strand is come out of the stove after laggard horizontal high voltage water de-scaling, is rolled into roughing mill, 1080 DEG C~1150 DEG C of start rolling temperature；In after roughing
Between base temperature >=950 DEG C, subsequently enter mm finishing mill unit rolling, 820 DEG C~880 DEG C of finishing temperature；Batch, batch after section cooling
560 DEG C~650 DEG C of temperature.
2. according to the production method of the inexpensive 490MPa levels hot rolling acid-cleaning plate described in claim 1, it is characterised in that hot rolling acid
The performance of board-washing meets tensile strength >=490MPa, elongation after fracture >=23%.
3. according to the production method of the inexpensive 490MPa levels hot rolling acid-cleaning plate described in claim 1, it is characterised in that preferably
, by weight percentage, 490MPa level hot rolling acid-cleaning plates use high titanium low-cost alloy composition for：
C：0.07%th, Si：0.30%th, Mn：0.30%th, P：0.015%th, S：0.010%th, Als：0.025%th, Ti：0.060%th,
N：0.003%th, surplus is iron and inevitable impurity.
4. according to the production method of the inexpensive 490MPa levels hot rolling acid-cleaning plate described in claim 1, it is characterised in that preferably
, by weight percentage, 490MPa level hot rolling acid-cleaning plates use high titanium low-cost alloy composition for：
C：0.06%th, Si：0.25%th, Mn：0.15%th, P：0.012%th, S：0.008%th, Als：0.020%th, Ti：0.050%th,
N：0.005%th, surplus is iron and inevitable impurity.
5. according to the production method of the inexpensive 490MPa levels hot rolling acid-cleaning plate described in claim 1, it is characterised in that preferably
, by weight percentage, 490MPa level hot rolling acid-cleaning plates use high titanium low-cost alloy composition for：
C：0.08%th, Si：0.20%th, Mn：0.45%th, P：0.010%th, S：0.012%th, Als：0.035%th, Ti：0.070%th,
N：0.004%th, surplus is iron and inevitable impurity.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610608324.2A CN107663611A (en) | 2016-07-29 | 2016-07-29 | A kind of production method of inexpensive 490MPa levels hot rolling acid-cleaning plate |
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| CN201610608324.2A CN107663611A (en) | 2016-07-29 | 2016-07-29 | A kind of production method of inexpensive 490MPa levels hot rolling acid-cleaning plate |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111235480A (en) * | 2020-03-17 | 2020-06-05 | 本钢板材股份有限公司 | Preparation method of high-strength steel coil |
| CN112626418A (en) * | 2020-12-15 | 2021-04-09 | 本钢板材股份有限公司 | QStE420TM hot-rolled pickled plate and production method thereof |
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| CN103540845A (en) * | 2013-11-07 | 2014-01-29 | 武汉钢铁(集团)公司 | Hot-rolled thin plate enamelled steel with yield strength of 330 MPa and manufacturing method thereof |
| CN103667907A (en) * | 2013-12-03 | 2014-03-26 | 武汉钢铁(集团)公司 | Hot-rolled high-strength sheet steel having tensile strength of 510MPa, and production method thereof |
| CN105779873A (en) * | 2016-05-12 | 2016-07-20 | 本钢板材股份有限公司 | High-titanium low-cost S500MC hot-rolled pickled plate and production method thereof |
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2016
- 2016-07-29 CN CN201610608324.2A patent/CN107663611A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103540845A (en) * | 2013-11-07 | 2014-01-29 | 武汉钢铁(集团)公司 | Hot-rolled thin plate enamelled steel with yield strength of 330 MPa and manufacturing method thereof |
| CN103667907A (en) * | 2013-12-03 | 2014-03-26 | 武汉钢铁(集团)公司 | Hot-rolled high-strength sheet steel having tensile strength of 510MPa, and production method thereof |
| CN105779873A (en) * | 2016-05-12 | 2016-07-20 | 本钢板材股份有限公司 | High-titanium low-cost S500MC hot-rolled pickled plate and production method thereof |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111235480A (en) * | 2020-03-17 | 2020-06-05 | 本钢板材股份有限公司 | Preparation method of high-strength steel coil |
| CN112626418A (en) * | 2020-12-15 | 2021-04-09 | 本钢板材股份有限公司 | QStE420TM hot-rolled pickled plate and production method thereof |
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Application publication date: 20180206 |