CN107557684B - A kind of DH590MPa acid rolling production process control method - Google Patents
A kind of DH590MPa acid rolling production process control method Download PDFInfo
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- CN107557684B CN107557684B CN201710750812.1A CN201710750812A CN107557684B CN 107557684 B CN107557684 B CN 107557684B CN 201710750812 A CN201710750812 A CN 201710750812A CN 107557684 B CN107557684 B CN 107557684B
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Abstract
The invention belongs to dual phase steel rolling technical fields, disclose a kind of DH590MPa acid rolling production process control method, comprising the following steps: hot rolled coil uncoiling, roll bending straightening, pickling, cold continuous rolling, is batched as chill volume at roll bending welding；The material composition of hot rolled coil is C:0.13%~0.148%, Mn:1.6%~2.05%, Si:0.37%~0.43%, P:0.014%~0.015%, S:0.003%~0.005%, Alt:0.45%~0.55%.The present invention provides the dual phase steel of a kind of good profile and thickness deviation.
Description
Technical field
The present invention relates to dual phase steel rolling technical field, in particular to a kind of DH590MPa acid rolling production process controlling party
Method.
Background technique
As auto industry energy-saving and emission-reduction, lightweight develop, dual phase steel is due to good comprehensive mechanical property application
The most extensively.
But find in use, traditional dual phase steel still forming difficulty on many high drawability parts,
It is difficult to meet Automobile Design complexity punching structure part, this, which is directly resulted in, cracking phenomena occurs in punching course.For this purpose, vast vapour
Depot proposes the demand of DH steel (having enhancing plasticity dual phase steel).
However, at present in the related art, Shang Buneng is rolled in acid produces DH590Mpa grades with enhancing in industrial producing line
Plasticity dual phase steel.
Summary of the invention
The present invention provides a kind of DH590MPa acid rolling production process control method, solves in punching course in the prior art easily
There is the technical issues of cracking defect.
In order to solve the above technical problems, the present invention provides a kind of DH590MPa acid rolling production process control methods, including
Following steps: hot rolled coil uncoiling, roll bending straightening, pickling, cold continuous rolling, is batched as chill volume at roll bending welding；
The material composition of hot rolled coil is C:0.13%~0.148%, Mn:1.6%~2.05%, Si:0.37%~
0.43%, P:0.0 14%~0.015%, S:0.003%~0.005%, Alt:0.45%~0.55%；
Coiled sheet welding uses laser welding process, and bonding power is 10000~12000w；Speed of welding is 2~6m/min,
Wire feed rate is 2~7m/min, and annealing electric current is 100~180A, and annealing temperature is 700~800 DEG C；
During roll bending straightening, stretch-bend leveller elongation percentage are as follows: 0.5~2.0%, 1# bending unit insertion: 20~
40mm；2# bending unit insertion: 16~36mm；3# resistance straightening unit insertion: 8~20mm；
In acid cleaning process, pickling temperature: 75~90 DEG C；Pickling speed: 40~220m/min；
In continuous cold rolling process,
Depress apportionment ratio: the pressure apportionment ratio of F1~F5 rack is successively are as follows: 25~35%, 25~35%, 25~33%, 20
~27%, 0.3~1%；
From inlet of rolling mill to milling train export five racks between unit tension successively are as follows: 40~70N/mm2, 130~170N/mm2,
150~190N/mm2, 150~210N/mm2, 160~230N/mm2, 40~70N/mm2；
Inlet of rolling mill speed are as follows: 30~200m/min；
Milling train F1~F5 work roll bending power is successively are as follows: 400~500KN, 400~500KN, 400~500KN, 400~
500KN, 100~300KN.
Further, the hot rolled coil raw material coiling temperature are as follows: 630~670 DEG C.
Further, the hot rolled coil raw tissue is pearlitic structrure, ferritic structure.
Further, tissue is martensitic structure after weld seam annealing.
Further, the offline plate shape straightness average value of chill volume is 1.5IU~1.6IU.
Further, the offline plate thickness deviation of chill volume is 0.5% or 0.5% or less.
One or more technical solutions provided in the embodiments of the present application have at least the following technical effects or advantages:
The DH590MPa acid rolling production process control method provided in the embodiment of the present application, passes through five rack of pickling appropriate
The control of cold continuous rolling related process, the laser welding process including hot rolling raw material；Stretching-bending straightener elongation percentage and insertion
Technological parameter, the temperature of turbulence acid dip and speed and five rack cold continuous rolling rolling mill technology parameters.Finally obtain the plate of chill volume
Shape average value is less than 2.0IU, realizes 590MPa high intensity Multiphase Steel in the industrialized production of acid rolls producing line.By adjusting element
Content adds appropriate alloying element on the basis of optimizing to hot rolling, cold-rolling process, so that it is preferable high-strength to be maintained
Automobile steel is spent, considerable economic benefit can be brought.
Specific embodiment
The embodiment of the present application is rushed in the prior art by providing a kind of DH590MPa acid rolling production process control method, solution
Easily occurs the technical issues of cracking defect during pressure.
In order to better understand the above technical scheme, below in conjunction with specification and specific embodiment to above-mentioned skill
Art scheme is described in detail, it should be understood that the specific features in the embodiment of the present invention and embodiment are to present techniques side
The detailed description of case, rather than the restriction to technical scheme, in the absence of conflict, the embodiment of the present application and
Technical characteristic in embodiment can be combined with each other.
A kind of DH590MPa acid rolling production process control method, comprising the following steps: hot rolled coil uncoiling, roll bending welding, volume
Plate straightening, cold continuous rolling, is batched as chill volume at pickling.
The material composition of hot rolled coil is C:0.13%~0.148%, Mn:1.6%~2.05%, Si:0.37%~
0.43%, P:0.0 14%~0.015%, S:0.003%~0.005%, Alt:0.45%~0.55%.The hot rolled coil is former
Expect coiling temperature are as follows: 630~670 DEG C.
The hot rolled coil raw tissue is pearlitic structrure, ferritic structure.
Coiled sheet welding uses laser welding process, and bonding power is 10000~12000w；Speed of welding is 2~6m/min,
Wire feed rate is 2~7m/min, and annealing electric current is 100~180A, and annealing temperature is 700~800 DEG C.Tissue is after weld seam annealing
Martensitic structure.
During roll bending straightening, stretch-bend leveller elongation percentage are as follows: 0.5~2.0%, 1# bending unit insertion: 20~
40mm；2# bending unit insertion: 16~36mm；3# resistance straightening unit insertion: 8~20mm.
In acid cleaning process, pickling temperature: 75~90 DEG C；Pickling speed: 40~220m/min.
In continuous cold rolling process,
Depress apportionment ratio: the pressure apportionment ratio of F1~F5 rack is successively are as follows: 25~35%, 25~35%, 25~33%, 20
~27%, 0.3~1%.
From inlet of rolling mill to milling train export five racks between unit tension successively are as follows: 40~70N/mm2, 130~170N/mm2,
150~190N/mm2, 150~210N/mm2, 160~230N/mm2, 40~70N/mm2。
Inlet of rolling mill speed are as follows: 30~200m/min.
Milling train F1~F5 work roll bending power is successively are as follows: 400~500KN, 400~500KN, 400~500KN, 400~
500KN, 100~300KN.
Further, the offline plate shape straightness average value of chill volume is 1.5IU~1.6IU.The offline plate thickness of chill volume is inclined
Difference is 0.5% or 0.5% or less.
Illustrate this programme below by specific embodiment.
Embodiment 1
Hot rolling material composition are as follows: C:0.14%, Mn:1.6%, Si:0.4%, P:0.015%, S:0.003%, Alt:
0.5%.
After the completion of smelting procedure, hot rolling finishing temperature is 893 DEG C, and coiling temperature is 654 DEG C, the yield strength of hot rolling raw material
For 418MPa, hot rolling raw tissue is ferritic structure and pearlitic structrure.Laser welding process parameter are as follows: power 11000w,
Speed of welding is 4.5m/min, and wire feed rate 4.5m/min, annealing electric current is 110A.Withdrawal straightening machine elongation percentage are as follows: 0.8%；1#
Bending unit insertion: 35mm；2# bending unit insertion: 34mm；3# resistance straightening unit insertion: 16mm.Pickling speed: 60~
199m/min, pickling temperature: 76.7 DEG C.
The pressure apportionment ratio of milling train: the pressure apportionment ratio of F1~F5 rack is successively are as follows: 33.1%, 31.5%, 24.6%,
25.4%, 0.5%.From inlet of rolling mill to milling train export five racks between unit tension successively are as follows: 52N/mm2, 140N/mm2, 165N/
mm2, 185N/mm2, 190N/mm2, 65N/mm2.Inlet of rolling mill speed are as follows: 75m/min.Milling train F1~F5 work roll bending power according to
It is secondary are as follows: 432KN, 425KN, 437KN, 427KN, 138KN.The offline plate shape straightness average value 1.5IU of chill volume, thickness deviation exist
Within 0.5%, meet the chill rollback request of high intensity DH steel.
Embodiment 2
Hot rolling material composition are as follows: C:0.13%, Mn:2.05%, Si:0.37%, P:0.014%, S:0.005%, Alt:
0.45%.
After the completion of smelting procedure, hot rolling finishing temperature is 885 DEG C, and coiling temperature is 643 DEG C, the yield strength of hot rolling raw material
For 421MPa, hot rolling raw tissue is ferritic structure and pearlitic structrure.Laser welding process parameter are as follows: power 11000w,
Speed of welding is 4.3m/min, and wire feed rate 4.2m/min, annealing electric current is 110A.Withdrawal straightening machine elongation percentage are as follows: 1.5%；1#
Bending unit insertion: 38mm；2# bending unit insertion: 26mm；3# resistance straightening unit insertion: 18mm.Pickling speed: 74~
190m/min, pickling temperature: 87.6 DEG C.
The pressure apportionment ratio of milling train: the pressure apportionment ratio of F1~F5 rack is successively are as follows: 28.7%, 28.7%, 26.6%,
25.4%, 0.4%.From inlet of rolling mill to milling train export five racks between unit tension successively are as follows: 54N/mm2, 153N/mm2, 150N/
mm2, 162N/mm2, 177N/mm2, 63N/mm2.Inlet of rolling mill speed are as follows: 75m/min.Milling train F1~F5 work roll bending power according to
It is secondary are as follows: 446KN, 458KN, 453KN, 449KN, 165KN.The offline plate shape straightness average value 1.6IU of chill volume, thickness deviation exist
Within 0.5%, meet the chill rollback request of high intensity DH steel.
Embodiment 3
Hot rolling material composition are as follows: C:0.148%, Mn:1.65%, Si:0.43%, P:0.014%, S:0.005%, Alt:
0.55%.
After the completion of smelting procedure, hot rolling finishing temperature is 918 DEG C, and coiling temperature is 655 DEG C, the yield strength of hot rolling raw material
For 432MPa.Laser welding process parameter are as follows: power 11000w, speed of welding 5m/min, wire feed rate 4.8m/min are moved back
Thermoelectricity stream is 110A.Withdrawal straightening machine elongation percentage are as follows: 1.3%；1# bending unit insertion: 34mm；2# bending unit insertion:
38mm；3# resistance straightening unit insertion: 19mm.Pickling speed: 75~205m/min, pickling temperature: 85.5 DEG C.
The pressure apportionment ratio of milling train: the pressure apportionment ratio of F1~F5 rack is successively are as follows: 33.8%, 33.6%, 29.0%,
27.4%, 0.55%.From inlet of rolling mill to milling train export five racks between unit tension successively are as follows: 55N/mm2, 155N/mm2,
165N/mm2, 180/mm2, 182N/mm2, 60N/mm2.Inlet of rolling mill speed are as follows: 70m/min.Milling train F1~F5 work roll bending
Power is successively are as follows: 475KN, 475KN, 470KN, 465KN, 146KN.The offline plate shape straightness average value 1.6IU of chill volume, thickness are inclined
Difference meets the chill rollback request of high intensity DH steel within 0.5%.
One or more technical solutions provided in the embodiments of the present application have at least the following technical effects or advantages:
The DH590MPa acid rolling production process control method provided in the embodiment of the present application, passes through five rack of pickling appropriate
The control of cold continuous rolling related process, the laser welding process including hot rolling raw material；Stretching-bending straightener elongation percentage and insertion
Technological parameter, the temperature of turbulence acid dip and speed and five rack cold continuous rolling rolling mill technology parameters.Finally obtain the plate of chill volume
Shape average value is less than 2.0IU, realizes 590MPa high intensity Multiphase Steel in the industrialized production of acid rolls producing line.By adjusting element
Content adds appropriate alloying element on the basis of optimizing to hot rolling, cold-rolling process, so that it is preferable high-strength to be maintained
Automobile steel is spent, considerable economic benefit can be brought.
It should be noted last that the above specific embodiment is only used to illustrate the technical scheme of the present invention and not to limit it,
Although being described the invention in detail referring to example, those skilled in the art should understand that, it can be to the present invention
Technical solution be modified or replaced equivalently, without departing from the spirit and scope of the technical solution of the present invention, should all cover
In the scope of the claims of the present invention.
Claims (1)
1. a kind of DH590MPa acid rolling production process control method, comprising the following steps: hot rolled coil uncoiling, roll bending welding, roll bending
Straightening, cold continuous rolling, is batched as chill volume at pickling；It is characterized in that,
The material composition of hot rolled coil is C:0.13%~0.148%, Mn:1.6%~2.05%, Si:0.37%~0.43%,
P:0.0 14%~0.015%, S:0.003%~0.005%, Alt:0.45%~0.55%；
Coiled sheet welding uses laser welding process, and bonding power is 10000~12000w；Speed of welding is 2~6m/min, wire feed
Speed is 2~7m/min, and annealing electric current is 100~180A, and annealing temperature is 700~800 DEG C；
During roll bending straightening, stretch-bend leveller elongation percentage are as follows: 0.5~2.0%, 1# bending unit insertion: 20~40mm；
2# bending unit insertion: 16~36mm；3# resistance straightening unit insertion: 8~20mm；
In acid cleaning process, pickling temperature: 75~90 DEG C；Pickling speed: 40~220m/min；
In continuous cold rolling process,
Depress apportionment ratio: the pressure apportionment ratio of F1~F5 rack is successively are as follows: 25~35%, 25~35%, 25~33%, 20~
27%, 0.3~1%；
From inlet of rolling mill to milling train export five racks between unit tension successively are as follows: 40~70N/mm2, 130~170N/mm2, 150~
190N/mm2, 150~210N/mm2, 160~230N/mm2, 40~70N/mm2；
Inlet of rolling mill speed are as follows: 30~200m/min；
Milling train F1~F5 work roll bending power is successively are as follows: 400~500kN, 400~500kN, 400~500kN, 400~
500kN, 100~300kN；
The hot rolled coil raw material coiling temperature are as follows: 630~670 DEG C；
The hot rolled coil raw tissue is pearlitic structrure, ferritic structure, and tissue is martensitic structure after weld seam annealing, chill
Rolling up offline plate shape straightness average value is 1.5IU~1.6IU；
The offline plate thickness deviation of chill volume is 0.5% or 0.5% or less.
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| CN108754104B (en) * | 2018-06-20 | 2020-07-17 | 北京首钢股份有限公司 | Method for eliminating 590 Mpa-grade dual-phase steel hot-rolling flat-rolling defect |
| CN111501052A (en) * | 2019-01-30 | 2020-08-07 | 宝山钢铁股份有限公司 | Pickling process method for high-temperature coil material and application |
| CN111015108B (en) * | 2019-12-19 | 2021-11-02 | 北京首钢股份有限公司 | Method for controlling surface defects of pickled plate |
| CN111979490B (en) * | 2020-09-07 | 2021-12-24 | 鞍钢股份有限公司 | High-ductility and high-formability cold-rolled DH590 steel and production method thereof |
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| CN102286689A (en) * | 2011-09-02 | 2011-12-21 | 北京科技大学 | Preparation method for double-phase forming steel |
| CN104384228A (en) * | 2014-09-18 | 2015-03-04 | 北京首钢冷轧薄板有限公司 | Process control method for pickling rolling production of high strength IF steel and device thereof |
| CN106119716A (en) * | 2016-06-17 | 2016-11-16 | 首钢总公司 | The cold-rolled galvanized duplex steel of a kind of plasticity enhancing and production method thereof |
| CN106222386A (en) * | 2016-07-22 | 2016-12-14 | 北京首钢冷轧薄板有限公司 | A kind of method manufacturing dual phase steel |
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Patent Citations (4)
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| CN102286689A (en) * | 2011-09-02 | 2011-12-21 | 北京科技大学 | Preparation method for double-phase forming steel |
| CN104384228A (en) * | 2014-09-18 | 2015-03-04 | 北京首钢冷轧薄板有限公司 | Process control method for pickling rolling production of high strength IF steel and device thereof |
| CN106119716A (en) * | 2016-06-17 | 2016-11-16 | 首钢总公司 | The cold-rolled galvanized duplex steel of a kind of plasticity enhancing and production method thereof |
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