CN105950987A - High-titanium low-cost S420MC hot-rolled acid pickling plate and production method thereof - Google Patents
High-titanium low-cost S420MC hot-rolled acid pickling plate and production method thereof Download PDFInfo
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- CN105950987A CN105950987A CN201610311964.7A CN201610311964A CN105950987A CN 105950987 A CN105950987 A CN 105950987A CN 201610311964 A CN201610311964 A CN 201610311964A CN 105950987 A CN105950987 A CN 105950987A
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- Prior art keywords
- hot rolling
- cleaning plate
- s420mc
- hot
- rolling acid
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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
- C22C38/14—Ferrous alloys, e.g. steel alloys containing titanium or zirconium
-
- 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
-
- 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
-
- 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
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Metal Rolling (AREA)
Abstract
Provided is a high-titanium low-cost S420MC hot-rolled acid pickling plate. By means of the high-titanium low-cost S420MC hot-rolled acid pickling plate, the problems that an S420MC hot-rolled acid pickling plate produced in the prior art is high in production cost, poor in surface quality and the like are mainly solved. The high-titanium low-cost S420MC hot-rolled acid pickling plate comprises, by weight, 0.04%-0.10% of C, 0.35% or less of Si, 0.50%-0.90% of Mn, 0.020% or less of P, 0.015% or less of S, 0.015%-0.040% of Alt, 0.050%-0.080% of Ti, 0.006% or less of N, and the balance Fe and unavoidable impurities. The invention further provides a production method of the high-titanium low-cost S420MC hot-rolled acid pickling plate. The method includes the steps of preparation of a continuous casting blank of the hot-rolled acid pickling plate, heating and heat preservation, descaling with high-pressure water, rough rolling, finish rolling, and coiling after laminar cooling, and accordingly the S420MC hot-rolled acid pickling plate is obtained finally. By means of the high-titanium low-cost S420MC hot-rolled acid pickling plate and the production method thereof, the production cost is reduced greatly, and the defects like peeling off are avoided.
Description
Technical field
The present invention relates to a kind of high titanium low cost S 420MC hot rolling acid-cleaning plate and production method thereof, belong to hot rolling acid
Wash plate manufacturing technology field.
Background technology
S420MC hot rolling acid-cleaning plate belongs to low-alloy high-strength steel, is also cold formability high yield stress steel simultaneously,
At home and abroad the field such as vehicle, machinery, building is extensively applied.At present both at home and abroad steel mill have been used up carbon/manganese-
Niobium-titanium set member design, high cost is the major defect of this composition design, causes the market competitiveness poor,
Have a strong impact on the achievement of steel mill.Simultaneously because the impact of composition design, crackle in continuous casting production process is caused to incline
Tropism is big, easily angle transverse discontinuity occurs in strand corner, has a strong impact on the surface matter of S420MC hot rolling acid-cleaning plate
Amount etc..Based on above reason, it is badly in need of a kind of new technology and solves problem above, produce low cost, high-quality
Product.
Along with titaniferous Second Phase Precipitation in the reaching its maturity of smelting technique and Controlled Rolling And Controlled Cooling, titanium micro-alloyed steel
Theoretical is the most perfect, and the economy of current ferrotianium, the advantage in price compared with ferro-niobium, vanadium iron,
Titanium microalloying is used to have lower cost.The effect of titanium is mainly reflected in following aspects: titanium can be with
Nitrogen, carbon combine, and form stable nitride, carbide, stop Austenite Grain Growth, thus improve material
The welding performance of material；Sulfide in titanium energy modified steel, improves the difference of the vertically and horizontally performance of material and cold one-tenth
Type performance；During Ti content height (＞ 0.04%), in conjunction with suitable heat processing technique, disperse can be formed tiny
Titanium carbide, plays precipitation strength effect；Titanium has certain refined crystalline strengthening effect simultaneously.Therefore high titanium work is used
Skill design can realize producing low cost, high-quality product.
Existing S420MC hot rolling acid-cleaning plate uses carbon/manganese-niobium-titanium set member design, and high cost is this composition
The major defect of design, causes the market competitiveness poor.Simultaneously because the impact of composition design, cause continuous casting
In production process, crack tendence is big, easily angle transverse discontinuity occurs in strand corner, has a strong impact on S420MC
The surface quality etc. of hot rolling acid-cleaning plate.
Summary of the invention
The technical problem to be solved is to provide a kind of high titanium low cost S 420MC hot rolling acid-cleaning plate
And production method.The method main purpose is to improve the S420MC hot rolling acid-cleaning plate life that prior art produces
Produce the problems such as high cost, surface quality difference.
To achieve these goals, the technical solution used in the present invention is as follows:
A kind of high titanium low cost S 420MC hot rolling acid-cleaning plate, this hot rolling acid-cleaning plate by following components according to weight hundred
Proportion by subtraction forms: C:0.04%-0.10%, Si≤0.35%, Mn:0.50%-0.90%, P≤0.020%, S≤
0.015%, Alt:0.015%-0.040%, Ti:0.050%-0.080%, N≤0.006%；Surplus be ferrum and
Inevitably impurity.
The production method of a kind of high titanium low cost S 420MC hot rolling acid-cleaning plate, comprises the following steps:
(1) hot rolling acid-cleaning plate continuous casting billet is prepared according to above-mentioned each component and percentage by weight proportioning；
(2) continuous casting billet is placed in walking beam furnace heating, is incubated 40-80min at 1170-1270 DEG C,
Make a large amount of solid solution of alloy；
(3), after laggard horizontal high voltage water de-scaling come out of the stove by continuous casting billet, roughing mill rolling, start rolling temperature 1080 DEG C are entered
-1150℃；Intermediate blank temperature >=950 DEG C after roughing,
(4) mm finishing mill unit rolling, finishing temperature 820 DEG C-880 DEG C are entered after roughing；
(5) batching after section cooling, coiling temperature is 560 DEG C-650 DEG C again.
(6) the final performance for preparing meets the S420MC of the requirement of trade mark S420MC in EN10149-2:1995
Hot rolling acid-cleaning plate.
Beneficial effects of the present invention:
S420MC hot rolling acid-cleaning plate of the present invention uses high titanium to substitute niobium and the method for part manganese, Ti content ＞ 0.04%
Substitute niobium and part Fe content, according to current alloy calculation of price, the cost ton steel of S420MC hot rolling acid-cleaning plate
About 120 yuan can be reduced, it is achieved the purpose of production cost is greatly lowered, the invigoration effect of titanium at S420MC
Hot rolling acid-cleaning plate gives full play to.Avoiding niobium carbonitrides to generate, titanium nitrogen fixation reduces the generation of aluminium nitride,
Reduce the crack sensitivity in strand corner, effectively prevent sticking up the defects such as skin and produce.
Detailed description of the invention
In order to make the purpose of the present invention, technical scheme and advantage clearer, below in conjunction with embodiment,
The present invention is further elaborated.Should be appreciated that specific embodiment described herein only in order to
Explain the present invention, be not intended to limit the present invention.
Embodiment 1
A kind of high titanium low cost S 420MC hot rolling acid-cleaning plate, this hot rolling acid-cleaning plate by following components according to weight hundred
Proportion by subtraction forms: C:0.04%, Si:0.35%, Mn:0.50%, P:0.020%, S:0.015%, Alt:
0.015%, Ti:0.050%, N:0.006%；Surplus is ferrum and inevitable impurity.
The production method of a kind of high titanium low cost S 420MC hot rolling acid-cleaning plate, comprises the following steps:
(1) hot rolling acid-cleaning plate continuous casting billet is prepared according to above-mentioned each component and percentage by weight proportioning；
(2) continuous casting billet is placed in walking beam furnace heating, is incubated 40min at 1170 DEG C, makes alloy big
Amount solid solution；
(3), after laggard horizontal high voltage water de-scaling come out of the stove by continuous casting billet, roughing mill rolling, start rolling temperature 1080 DEG C are entered；
Intermediate blank temperature >=950 DEG C after roughing,
(4) mm finishing mill unit rolling, finishing temperature 820 DEG C are entered after roughing；
(5) batching after section cooling, coiling temperature is 560 DEG C again.
(6) the final performance for preparing meets the S420MC of the requirement of trade mark S420MC in EN10149-2:1995
Hot rolling acid-cleaning plate.
Embodiment 2
A kind of high titanium low cost S 420MC hot rolling acid-cleaning plate, this hot rolling acid-cleaning plate by following components according to weight hundred
Proportion by subtraction forms: C:0.10%, Si≤0.35%, Mn:0.90%, P≤0.020%, S≤0.015%, Alt:
0.040%, Ti:0.080%, N≤0.006%；Surplus is ferrum and inevitable impurity.
The production method of a kind of high titanium low cost S 420MC hot rolling acid-cleaning plate, comprises the following steps:
(1) hot rolling acid-cleaning plate continuous casting billet is prepared according to above-mentioned each component and percentage by weight proportioning；
(2) continuous casting billet is placed in walking beam furnace heating, is incubated 80min at 1270 DEG C, makes alloy big
Amount solid solution；
(3), after laggard horizontal high voltage water de-scaling come out of the stove by continuous casting billet, roughing mill rolling, start rolling temperature 1150 DEG C are entered；
Intermediate blank temperature >=950 DEG C after roughing,
(4) mm finishing mill unit rolling, finishing temperature 880 DEG C are entered after roughing；
(5) batching after section cooling, coiling temperature is 650 DEG C again.
(6) the final performance for preparing meets the S420MC of the requirement of trade mark S420MC in EN10149-2:1995
Hot rolling acid-cleaning plate.
Embodiment 3
A kind of high titanium low cost S 420MC hot rolling acid-cleaning plate, this hot rolling acid-cleaning plate by following components according to weight hundred
Proportion by subtraction forms: C:0.06%, Si≤0.35%, Mn:0.70%, P≤0.020%, S≤0.015%, Alt:
0.030%, Ti:0.060%, N≤0.006%；Surplus is ferrum and inevitable impurity.
The production method of a kind of high titanium low cost S 420MC hot rolling acid-cleaning plate, comprises the following steps:
(1) hot rolling acid-cleaning plate continuous casting billet is prepared according to above-mentioned each component and percentage by weight proportioning；
(2) continuous casting billet is placed in walking beam furnace heating, is incubated 70min at 1220 DEG C, makes alloy big
Amount solid solution；
(3), after laggard horizontal high voltage water de-scaling come out of the stove by continuous casting billet, roughing mill rolling, start rolling temperature 1120 DEG C are entered；
Intermediate blank temperature >=950 DEG C after roughing,
(4) mm finishing mill unit rolling, finishing temperature 870 DEG C are entered after roughing；
(5) batching after section cooling, coiling temperature is 570 DEG C again.
(6) the final performance for preparing meets the S420MC of the requirement of trade mark S420MC in EN10149-2:1995
Hot rolling acid-cleaning plate.
Claims (5)
1. one kind high titanium low cost S 420MC hot rolling acid-cleaning plate, it is characterised in that this hot rolling acid-cleaning plate by with
Lower component forms according to percentage by weight: C:0.04%-0.10%, Si≤0.35%, Mn:0.50%-0.90%,
P≤0.020%, S≤0.015%, Alt:0.015%-0.040%, Ti:0.050%-0.080%, N≤0.006%；
Surplus is ferrum and inevitable impurity.
A kind of high titanium low cost S 420MC hot rolling acid-cleaning plate the most as claimed in claim 1, it is characterised in that
This hot rolling acid-cleaning plate is made up of according to percentage by weight following components: C:0.04%, Si:0.35%, Mn:0.50%,
P:0.020%, S:0.015%, Alt:0.015%, Ti:0.050%, N:0.006%；Surplus be ferrum and
Inevitably impurity.
A kind of high titanium low cost S 420MC hot rolling acid-cleaning plate the most as claimed in claim 1, it is characterised in that
This hot rolling acid-cleaning plate is made up of according to percentage by weight following components: C:0.10%, Si≤0.35%, Mn:0.90%,
P≤0.020%, S≤0.015%, Alt:0.040%, Ti:0.080%, N≤0.006%；Surplus be ferrum and
Inevitably impurity.
A kind of high titanium low cost S 420MC hot rolling acid-cleaning plate the most as claimed in claim 1, it is characterised in that
This hot rolling acid-cleaning plate is made up of according to percentage by weight following components: C:0.06%, Si≤0.35%, Mn:0.70%,
P≤0.020%, S≤0.015%, Alt:0.030%, Ti:0.060%, N≤0.006%；Surplus be ferrum and
Inevitably impurity.
5. produce a kind of high titanium low cost S 420MC hot rolling acid-cleaning plate such as claim 1 or 2 or 3 or 4
Method, comprises the following steps:
(1) hot rolling acid-cleaning plate continuous casting billet is prepared according to above-mentioned each component and percentage by weight proportioning；
(2) continuous casting billet is placed in walking beam furnace heating, is incubated 40-80min at 1170-1270 DEG C,
Make a large amount of solid solution of alloy；
(3), after laggard horizontal high voltage water de-scaling come out of the stove by continuous casting billet, roughing mill rolling, start rolling temperature 1080 DEG C are entered
-1150℃；Intermediate blank temperature >=950 DEG C after roughing,
(4) mm finishing mill unit rolling, finishing temperature 820 DEG C-880 DEG C are entered after roughing；
(5) batching after section cooling, coiling temperature is 560 DEG C-650 DEG C again.
(6) the final performance for preparing meets the S420MC of the requirement of trade mark S420MC in EN10149-2:1995
Hot rolling acid-cleaning plate.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610311964.7A CN105950987A (en) | 2016-05-12 | 2016-05-12 | High-titanium low-cost S420MC hot-rolled acid pickling plate and production method thereof |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610311964.7A CN105950987A (en) | 2016-05-12 | 2016-05-12 | High-titanium low-cost S420MC hot-rolled acid pickling plate and production method thereof |
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| CN105950987A true CN105950987A (en) | 2016-09-21 |
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| CN201610311964.7A Pending CN105950987A (en) | 2016-05-12 | 2016-05-12 | High-titanium low-cost S420MC hot-rolled acid pickling plate and production method thereof |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106756568A (en) * | 2017-02-23 | 2017-05-31 | 本钢板材股份有限公司 | Without niobium low cost S 355MC hot rolling acid-cleaning plates and its production method |
| CN107904500A (en) * | 2017-11-17 | 2018-04-13 | 安阳钢铁股份有限公司 | A kind of Bending Processing low alloy hot rolling roll bending and preparation method thereof |
| CN109772898A (en) * | 2019-01-09 | 2019-05-21 | 本钢板材股份有限公司 | Eliminate the method for hot-continuous-rolling strip steel edge upwarping defect and the strip of this method production |
| 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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| JP2012036483A (en) * | 2010-08-11 | 2012-02-23 | Kobe Steel Ltd | METHOD OF MANUFACTURING Si-CONTAINING HOT-ROLLED STEEL SHEET EXCELLING IN PICKLING PROPERTY, AND PICKLING METHOD |
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2016
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| CN103147015A (en) * | 2011-12-07 | 2013-06-12 | 鞍钢股份有限公司 | Hot-rolled pickled plate having good phosphorization performances |
| JP2015071824A (en) * | 2013-09-04 | 2015-04-16 | Ｊｆｅスチール株式会社 | Method for producing high strength steel sheet |
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Non-Patent Citations (1)
| Title |
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| 陈宇: "本钢S420MC高强度冷成型用钢生产工艺研究", 《本钢技术》 * |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106756568A (en) * | 2017-02-23 | 2017-05-31 | 本钢板材股份有限公司 | Without niobium low cost S 355MC hot rolling acid-cleaning plates and its production method |
| CN107904500A (en) * | 2017-11-17 | 2018-04-13 | 安阳钢铁股份有限公司 | A kind of Bending Processing low alloy hot rolling roll bending and preparation method thereof |
| CN109772898A (en) * | 2019-01-09 | 2019-05-21 | 本钢板材股份有限公司 | Eliminate the method for hot-continuous-rolling strip steel edge upwarping defect and the strip of this method production |
| 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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