CN107971338A - The high-strength chill volume cold rolling process of building concrete fixing piece - Google Patents
The high-strength chill volume cold rolling process of building concrete fixing piece Download PDFInfo
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- CN107971338A CN107971338A CN201711183553.5A CN201711183553A CN107971338A CN 107971338 A CN107971338 A CN 107971338A CN 201711183553 A CN201711183553 A CN 201711183553A CN 107971338 A CN107971338 A CN 107971338A
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- China
- Prior art keywords
- cold rolling
- fixing piece
- strength
- building concrete
- concrete fixing
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- 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.)
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Classifications
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- 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
- B21B1/22—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 plates, strips, bands or sheets of indefinite length
- B21B1/24—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 plates, strips, bands or sheets of indefinite length in a continuous or semi-continuous process
- B21B1/28—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 plates, strips, bands or sheets of indefinite length in a continuous or semi-continuous process by cold-rolling, e.g. Steckel cold mill
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B45/00—Devices for surface or other treatment of work, specially combined with or arranged in, or specially adapted for use in connection with, metal-rolling mills
- B21B45/04—Devices for surface or other treatment of work, specially combined with or arranged in, or specially adapted for use in connection with, metal-rolling mills for de-scaling, e.g. by brushing
- B21B45/06—Devices for surface or other treatment of work, specially combined with or arranged in, or specially adapted for use in connection with, metal-rolling mills for de-scaling, e.g. by brushing of strip material
-
- 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
- C22C38/04—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
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23G—CLEANING OR DE-GREASING OF METALLIC MATERIAL BY CHEMICAL METHODS OTHER THAN ELECTROLYSIS
- C23G1/00—Cleaning or pickling metallic material with solutions or molten salts
- C23G1/02—Cleaning or pickling metallic material with solutions or molten salts with acid solutions
- C23G1/08—Iron or steel
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Chemical Kinetics & Catalysis (AREA)
- General Chemical & Material Sciences (AREA)
- Heat Treatment Of Sheet Steel (AREA)
Abstract
The invention belongs to iron and steel smelting technology field, and in particular to a kind of high-strength chill volume cold rolling process of building concrete fixing piece.The problem of lacking for the prior art using the measured building concrete fixing piece of the rolling matter of carbon manganese steel with high-strength chill volume method, the present invention provides a kind of high-strength chill volume cold rolling process of building concrete fixing piece.This method includes two steps of pickling and cold rolling, pickling can remove steel band into crossing iron scale for producing etc. after hot rolling, obtain preferable surface quality, cold rolling can realize client's brittle requirement of height high-strength to product by being plastically deformed the accumulation of processing hardening, and the high-strength chill volume of rolling is suitable for use as building concrete fixing piece.The method of the present invention is easy to operate, and the strip surface quality of rolling is good, excellent in mechanical performance, suitably used in building concrete fixing piece field.
Description
Technical field
The invention belongs to iron and steel smelting technology field, and in particular to a kind of building concrete fixing piece is cold with high-strength chill volume
Rolling method.
Background technology
With the rapid development of the national economy, infrastructure scale unprecedentedly expands, the template of construction is proposed more
High request, building concrete formwork fixing part (part of similar " anchor ear ") two keep forming template needs by being bolted
Shape, therefore stronger bearing capacity (intensity) is required, directly knocked off after the concrete has set with instruments such as iron hammers easy to quickly tear open
Unload, need connector brittleness larger to reduce knocker's power cost, therefore select hard and crisp material more suitable, it is high-strength cold
Hard coiled material matter performance in itself and its accordance are preferable, and part overseas enterprise produces building concrete with chill volume and fixes at present
Part.The domestic technique on Medium Carbon Steel Containing Manganese (SAE1035 in similar SAE J403~2001) production building concrete fixing piece compared with
It is few.
Patent CN105088063A discloses a kind of processing hardening high-strength steel and preparation method thereof, and this method hot rolled plate is again
Uncoiling carries out cold rolling after overpickling on reversible rolling or 5 Stands Cold Tandem Mills, and the reduction ratio of cold rolling is 60%~72%,
Finished product thickness is 0.6~1.2mm, yield strength Rp0.2：700~900MPa, tensile strength Rm：850~1100MPa, elongation
2~8%.The high-strength steel tensile strength that this method obtains is 850MPa~1100MPa, and the product for having significant proportion cannot meet visitor
The requirement for tensile strength >=950MPa that family proposes, and its component is using No. 20 steel (0.18~0.23%C), in order to carry
High intensity use increasing cold rolling reduction ratio (60~72%), cause greatly to bear to equipment first, secondly for carbon manganese steel and
It is bad that speech uses larger cold rolling reduction ratio to inevitably result in quality of edges.
Patent CN201310201201 discloses a kind of No. 45 steel of flat cold-rolled sheet and its production method, it is to point out chill
It is product mechanical property situation in the case of state, end properties yield strength is 340MPa or so, and tensile strength is 530MPa or so,
Elongation percentage A50 is 30% or so, is unsatisfactory for requirement of the user to product " hard and crisp ".40~70% scope of cold rolling reduction ratio is larger
Properties of product fluctuation can be caused big, its definite optimal cold rolling reduction ratio is 60%, carbon manganese steel (especially patent and carbon content
It is high) big cold rolling reduction ratio necessarily causes side to split defect risk to increase.
Therefore, can also be fixed without a kind of suitable method using the measured building concrete of the rolling matter of carbon manganese steel
The high-strength chill volume of part.
The content of the invention
In view of the above-mentioned problems, the present invention provides a kind of building concrete fixing piece with high-strength chill volume cold rolling process.Should
Method includes two steps of pickling and cold rolling, and pickling can remove steel band into iron scale for producing etc. is crossed after hot rolling, obtain compared with
Good surface quality, the accumulation that cold rolling can be hardened by being plastically deformed processing are realized that client's height high-strength to product is brittle and are wanted
Ask, the high-strength chill volume of rolling is suitable for use as building concrete fixing piece.
The present invention provides a kind of high-strength chill volume cold rolling process of building concrete fixing piece, comprises the following steps：
A, pickling
Steel billet is subjected to pickling, acid liquor temperature is 80~90 DEG C during pickling, and pickling is divided into three-level, and three-level acid tank free acid is dense
Angle value is respectively：50~65g/l, 80~105g/l, 110~135g/l；
B, cold rolling
Steel billet after step a pickling is subjected to cold rolling, the thickness of cold rolling coil be 1.5~3.0mm during cold rolling, control cold rolling
Lower rate is 45~60%, obtains building concrete fixing piece with high-strength chill volume.
Wherein, with high-strength chill volume cold rolling process, the composition of the steel billet is above-mentioned building concrete fixing piece：By weight
Measure percentages, C：0.33~0.38%, Si：0.17~0.37%, Mn：0.80~1.00%, P≤0.025%, S≤
0.010%, Als：0.010~0.060%, surplus is iron and inevitable impurity.
Further, for above-mentioned building concrete fixing piece with high-strength chill volume cold rolling process, pickling described in step a is fast
Spend for 50~150m/min.
Wherein, for above-mentioned building concrete fixing piece with high-strength chill volume cold rolling process, cold rolling described in step b uses primary side
The method of rolling carries out.
Wherein, above-mentioned building concrete fixing piece is with high-strength chill volume cold rolling process, and cold rolling coil surrender is strong described in step b
Spend 800~1020MPa, 980~1100MPa of tensile strength, elongation percentage A503~10%.
Beneficial effects of the present invention are：
(1) present invention controls strip in acid tank by the accurate control to acid cleaning process medium velocity, temperature and concentration
The time of operation and acidleach degree, both ensure that can clean the iron scale on surface etc., also ensure that belt steel surface will not mistake
Divide corrosion and cause overpickling, to obtain preferable belt steel surface.
(2) thickness of product of the present invention is 1.5~3.0mm, and it is 45~60% that acid, which rolls reduction ratio, and properties of product can meet visitor
Family requires, and the mechanical property scope of finished product is：800~1020MPa of yield strength, 980~1100MPa of tensile strength, elongation percentage
A50：3~10%.
(3) due to the present invention use primary side rolling, will not band steel edge formed micro-crack and in cold-rolled process by
Side is caused to split in processing hardening accumulation, the strip quality after cold rolling is more preferable.
Brief description of the drawings
Fig. 1 show the belt steel surface that embodiment uses the method for the present invention rolling.
Embodiment
The present invention provides a kind of high-strength chill volume cold rolling process of building concrete fixing piece, comprises the following steps：
A, pickling
Steel billet is subjected to pickling, acid liquor temperature is 80~90 DEG C during pickling, and pickling is divided into three-level, and three-level acid tank free acid is dense
Angle value is respectively：50~65g/l, 80~105g/l, 110~135g/l；
B, cold rolling
Steel billet after step a pickling is subjected to cold rolling, the thickness of cold rolling coil be 1.5~3.0mm during cold rolling, control cold rolling
Lower rate is 45~60%, obtains building concrete fixing piece with high-strength chill volume.
Further, for above-mentioned building concrete fixing piece with high-strength chill volume cold rolling process, the pickling speed is 50
~150m/min.
The present invention control pickling speed the reason for be in order to ensure strip surface quality, if the speed of service is too fast, band
Steel can cause to owe to wash acid tank soaking time is short, cause iron scale of belt steel surface etc. not wash off completely, and strip speed mistake
It is slow then cause strip in acid tank long soaking time and produced and washed, cause steel strip surface serious and become and spend by acid attack, table
Face quality reduces.When the speed of pickling is 50~150m/min in the present invention, strip surface quality is best.
Wherein, above-mentioned building concrete fixing piece is rolled with high-strength chill volume cold rolling process after the pickling using primary side
System.Directly rolled using primary side, both maintained the tissue morphology of edge after hot rolling, and avoided when coming into operation circle shear in band steel edge
Micro-crack is produced, so as to cause that crackle produces at micro-crack in cold rolling plastic history and extension forms side and splits, strip
Better quality.
Wherein, above-mentioned building concrete fixing piece is with high-strength chill volume cold rolling process, the cold rolling coil yield strength 800
~1020MPa, 980~1100MPa of tensile strength, elongation percentage A503~10%.
The thickness of cold rolling coil of the present invention is set according to the finished product thickness of customer requirement, for more preferable cold rolling effect, is needed
Strictly to control cold rolling reduction ratio is 45~60%, and cold rolling reduction ratio is too low it cannot be guaranteed that the mechanical property of customer requirement, causes
Such as not enough (＜ 950MPa), plasticity is higher, process workload after increase, and cold rolling reduction ratio is excessive, can increase for tensile strength
While splitting risk, strip surface quality is reduced；Therefore, cold rolling reduction ratio is ideal for 45~60%.
In the present invention, it is strong even if fully taking into account the more acid strength such as scale on surface when strip has just enter into acid tank
Moment strip can not be cleaned, fewer and fewer with the iron scale for moving forwards surface of strip, pickling effect is increasingly
Good, therefore, when pickling, is stepped up the free acid concentration of pickle, has stepped through 50~65g/l, 80~105g/l, 110~
The descaling bath of 135g/l, had both controlled cost and in turn ensure that strip surface quality.
The embodiment of the present invention is further described with reference to embodiment, is not therefore limited the present invention
System is among the embodiment described scope.
Embodiment 1 carries out cold rolling using the method for the present invention building concrete fixing piece with high-strength chill volume
Acid tank acid liquor temperature is 84 DEG C, and free acid concentration is respectively 62g/l, 96g/l, 120g/l in 1#~3# acid tanks, acid
It is 55m/min~120m/min to wash process section speed.Do not come into operation circle shear after pickling, and finished product thickness is under 1.9mm its cold rolling
Rate is 55.8%.
Coil of strip mechanical property after rolling is：Transmission side：Yield strength is：823MPa, tensile strength 1031MPa, prolong
Stretch rate A50For 7.0%；Middle part：Yield strength is：818MPa, tensile strength 1030MPa, elongation percentage A50For 8.0%；Operation
Side：Yield strength is：820MPa, tensile strength 1019MPa, elongation percentage A50For 6.0%.
Embodiment 2 carries out cold rolling using the method for the present invention building concrete fixing piece with high-strength chill volume
Acid tank acid liquor temperature is 86 DEG C, and free acid concentration is respectively 60g/l, 100g/l, 116g/l in 1#~3# acid tanks, acid
It is 60m/min~146m/min to wash process section speed.Do not come into operation circle shear after pickling, and finished product thickness is under 2.8mm its cold rolling
Rate is 46.2%.
Coil of strip mechanical property after rolling is：Transmission side：Yield strength is：935MPa, tensile strength 1073MPa, prolong
Stretch rate A50For 8.5%；Middle part：Yield strength is：927MPa, tensile strength 1080MPa, elongation percentage A50For 8.5%；Operation
Side：Yield strength is：943MPa, tensile strength 1063MPa, elongation percentage A50For 9.0%.
Embodiment 3 carries out cold rolling using the method for the present invention building concrete fixing piece with high-strength chill volume
Acid tank acid liquor temperature is 82 DEG C, and free acid concentration is respectively 60g/l, 92g/l, 123g/l in 1#~3# acid tanks, acid
It is 50m/min~132m/min to wash process section speed.Do not come into operation circle shear after pickling, and finished product thickness is under 2.8mm its cold rolling
Rate is 46.2%.
Coil of strip mechanical property after rolling is：Transmission side：Yield strength is：915MPa, tensile strength 1075MPa, prolong
Stretch rate A50For 7.0%；Middle part：Yield strength is：927MPa, tensile strength 1079MPa, elongation percentage A50For 9.0%；Operation
Side：Yield strength is：923MPa, tensile strength 1066MPa, elongation percentage A50For 8.0%.
Comparative example 1 does not use the method for the present invention rolled band steel
Specially：Strip of the thickness for the Hot Rolling Plate Production 1.9mm of 2.8mm is used, wherein cold rolling reduction ratio is 32.1%,
Remaining parameter is the same as embodiment 1.
Its mechanical property is：Transmission side：Yield strength 626MPa, tensile strength 875MPa, elongation percentage A5014%.Middle part：
Yield strength is：600MPa, tensile strength 850MPa, elongation percentage A50For 15.0%；Fore side：Yield strength is：654MPa、
Tensile strength is 872MPa, elongation percentage A50For 13.5%.
Comparative example 2 does not use the method for the present invention rolled band steel
Specially：It is 5.5mm Hot Rolling Plate Production 2.8mm strips with thickness, cold rolling reduction ratio is 49.1%, cold after pickling
Come into operation circle shear before rolling, remaining parameter is the same as embodiment 1.
Its mechanical property is as follows：Transmission side：Yield strength is：908MPa, tensile strength 1055MPa, elongation percentage A50For
7.5%；Middle part：Yield strength is：917MPa, tensile strength 1059MPa, elongation percentage A50For 8.5%；Fore side：Surrender is strong
Spend and be：921MPa, tensile strength 1067MPa, elongation percentage A50For 6.0%.Although mechanical property meets the requirements but occurs tight
The edge cracks of weight.
Comparative example 3 does not use the method for the present invention rolled band steel
Specially：Strip of the thickness for the Hot Rolling Plate Production 1.9mm of 5.6mm is used, cold rolling reduction ratio is 66.1%, remaining
Parameter is the same as embodiment 1.
Its mechanical property is：Transmission side：Yield strength 958MPa, tensile strength 1123MPa, elongation percentage A505.0%.In
Portion：Yield strength is：976MPa, tensile strength 1148MPa, elongation percentage A50For 5.0%；Fore side：Yield strength is：
963MPa, tensile strength 1166MPa, elongation percentage A50For 5.5%.Performance, which meets the requirements but more side occurs, splits defect.
Claims (5)
1. the high-strength chill volume cold rolling process of building concrete fixing piece, it is characterised in that comprise the following steps：
A, pickling
Steel billet is subjected to pickling, acid liquor temperature is 80~90 DEG C during pickling, and pickling is divided into three-level, three-level acid tank free acid concentration value
Respectively：50~65g/l, 80~105g/l, 110~135g/l；
B, cold rolling
Steel billet after step a pickling is subjected to cold rolling, the thickness of product volume is 1.5~3.0mm after cold rolling, controls cold rolling reduction ratio
For 45~60%, building concrete fixing piece is obtained with high-strength chill volume.
2. the high-strength chill volume cold rolling process of building concrete fixing piece according to claim 1, it is characterised in that：Step
The composition of steel billet described in a is：By weight percentage, C：0.33~0.38%, Si：0.17~0.37%, Mn：0.80~
1.00%, P≤0.025%, S≤0.010%, Als：0.010~0.060%, surplus is iron and inevitable impurity.
3. the high-strength chill volume cold rolling process of building concrete fixing piece according to claim 1, it is characterised in that：Step
Pickling speed described in a is 50~150m/min.
4. the high-strength chill volume cold rolling process of building concrete fixing piece according to claim 1, it is characterised in that：Step
Cold rolling described in b is carried out by the way of primary side rolling.
5. the high-strength chill volume cold rolling process of building concrete fixing piece according to claim 1, it is characterised in that：Step
800~1020MPa of cold rolling coil yield strength, 980~1100MPa of tensile strength, elongation percentage A described in b503~10%.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711183553.5A CN107971338A (en) | 2017-11-23 | 2017-11-23 | The high-strength chill volume cold rolling process of building concrete fixing piece |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711183553.5A CN107971338A (en) | 2017-11-23 | 2017-11-23 | The high-strength chill volume cold rolling process of building concrete fixing piece |
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| CN107971338A true CN107971338A (en) | 2018-05-01 |
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ID=62011205
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| CN201711183553.5A Pending CN107971338A (en) | 2017-11-23 | 2017-11-23 | The high-strength chill volume cold rolling process of building concrete fixing piece |
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Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3918282A (en) * | 1974-09-04 | 1975-11-11 | Blaw Knox Foundry Mill Machine | Combination pickling-rolling mill |
| JPH1024301A (en) * | 1996-07-11 | 1998-01-27 | Kawasaki Steel Corp | Hot rolled steel sheet and hot dip galvanized steel sheet excellent in formability with roll and manufacture of those sheets |
| CN101941021A (en) * | 2010-08-13 | 2011-01-12 | 济南钢铁股份有限公司 | Method for producing extra-deep drawing cold-rolled steel plate based on ASP process |
| CN104195443A (en) * | 2014-05-19 | 2014-12-10 | 首钢总公司 | High-flexural-behavior hot-formed steel used for automobiles and manufacturing method thereof |
| CN105088063A (en) * | 2014-05-19 | 2015-11-25 | 上海梅山钢铁股份有限公司 | Work-hardening high-strength steel and manufacturing method thereof |
| CN105256323A (en) * | 2015-11-04 | 2016-01-20 | 攀钢集团攀枝花钢铁研究院有限公司 | Continuous acid pickling method for hot-rolled dual-phase steel |
| CN106086638A (en) * | 2016-06-17 | 2016-11-09 | 首钢总公司 | A kind of Galvanized Dual Phase Steel and production method thereof |
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2017
- 2017-11-23 CN CN201711183553.5A patent/CN107971338A/en active Pending
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|---|---|---|---|---|
| US3918282A (en) * | 1974-09-04 | 1975-11-11 | Blaw Knox Foundry Mill Machine | Combination pickling-rolling mill |
| JPH1024301A (en) * | 1996-07-11 | 1998-01-27 | Kawasaki Steel Corp | Hot rolled steel sheet and hot dip galvanized steel sheet excellent in formability with roll and manufacture of those sheets |
| CN101941021A (en) * | 2010-08-13 | 2011-01-12 | 济南钢铁股份有限公司 | Method for producing extra-deep drawing cold-rolled steel plate based on ASP process |
| CN104195443A (en) * | 2014-05-19 | 2014-12-10 | 首钢总公司 | High-flexural-behavior hot-formed steel used for automobiles and manufacturing method thereof |
| CN105088063A (en) * | 2014-05-19 | 2015-11-25 | 上海梅山钢铁股份有限公司 | Work-hardening high-strength steel and manufacturing method thereof |
| CN105256323A (en) * | 2015-11-04 | 2016-01-20 | 攀钢集团攀枝花钢铁研究院有限公司 | Continuous acid pickling method for hot-rolled dual-phase steel |
| CN106086638A (en) * | 2016-06-17 | 2016-11-09 | 首钢总公司 | A kind of Galvanized Dual Phase Steel and production method thereof |
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| Title |
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| 王林等: "边部组织及切边工艺对低碳SPHC冷轧边裂的影响", 《中国冶金》 * |
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Application publication date: 20180501 |