CN109332394A - Eliminate the method that stainless steel wide cut cold plate rolls local heat slid wound defect - Google Patents
Eliminate the method that stainless steel wide cut cold plate rolls local heat slid wound defect Download PDFInfo
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- CN109332394A CN109332394A CN201811156534.8A CN201811156534A CN109332394A CN 109332394 A CN109332394 A CN 109332394A CN 201811156534 A CN201811156534 A CN 201811156534A CN 109332394 A CN109332394 A CN 109332394A
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- 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
- B21B37/28—Control of flatness or profile during rolling of strip, sheets or plates
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- 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
- B21B37/28—Control of flatness or profile during rolling of strip, sheets or plates
- B21B37/44—Control of flatness or profile during rolling of strip, sheets or plates using heating, lubricating or water-spray cooling of the product
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Abstract
The present invention provides a kind of method that elimination stainless steel wide cut cold plate rolls local heat slid wound defect comprising: (1) standardize first passage and extreme trace time rolling deformation rate；(2) previous three passes Edge shape value is controlled；(3) optimize the ROLLING OIL distributive value of the operation of rolling；(4) mill speed of each passage is limited.This method restrained effectively the surface defect that traditional operation of rolling causes local heat slid wound due to rupture of oil film, the surface quality after being obviously improved the rolling of stainless steel wide cut cold plate.
Description
Technical field
Present invention relates in general to technical field of steel rolling more particularly to width >=1500mm stainless steel wide cut cold plate to roll
System, specially a kind of method eliminated stainless steel wide cut cold plate and roll local heat slid wound defect.
Background technique
Stainless steel wide cut cold plate has many advantages, such as that width is big, surface quality is good, dimensional accuracy is high, for example, 300 series are stainless
Steel wide cut cold plate is widely used in the manufacturings such as deep-draw type component and acid delivering pipeline, container, and additional profit is high, market
Demand increases year by year, but client is high to the surface requirements of the product, to give the quality control level band of manufacturing enterprise
To challenge.300 series stainless steel wide cut cold plates use Sendzimir (SENDZIMIR) milling train, Sang Dewei (SUNDWING) 20
Roller mill and SUNDWING S6 type eighteen-high mill roll, and using multi-pass reversible rolling, granule surface contral difficulty is big, produces
Upper and lower surface is away from " short vertical-shaped " scratch defect i.e. rolling office for occurring being distributed along rolling direction in two edge 100-500mm in journey
Portion's heat slid wound defect still has apparent depth after sand paper polishing, and subsequent handling can not be eliminated, and seriously affects client's use, makes
It is substantially improved at production cost.
Therefore, how to eliminate stainless steel wide cut cold plate and roll local heat slid wound defect, especially 300 series stainless steel wide cuts
Cold plate rolls local heat slid wound defect, becomes those skilled in the art's technical problem urgently to be resolved.
Summary of the invention
It is an object of the invention to eliminate stainless steel wide cut cold plate, particularly 300 series stainless steel wide cut cold plates, rolling office
Portion's heat slid wound defect.
To achieve the goals above, the method packet eliminated stainless steel wide cut cold plate and roll local heat slid wound defect of the invention
It includes: standardizing first passage and extreme trace time rolling deformation rate；Control previous three passes Edge shape value；Optimize the ROLLING OIL spray of the operation of rolling
Oil mass；Limit the mill speed of each passage.
Preferably, in standardizing first passage and extreme trace time rolling deformation rate: being that 3.5mm finished product thickness is for raw thickness
The rolling of 1.2mm, first pass deformation rate≤20%, last pass deformation rate≤11%；It is 4.0mm finished product thickness for raw thickness
For the rolling of 1.5mm, first pass deformation rate≤19%, last pass deformation rate≤9%；It is that 4.5mm finished product is thick for raw thickness
Degree is the rolling of 2.0mm, first pass deformation rate≤19%, last pass deformation rate≤9%；It is 5.0mm finished product for raw thickness
With a thickness of the rolling of 2.5mm, first pass deformation rate≤18%, last pass deformation rate≤9%；For raw thickness be 5.5mm at
Rolling of the product with a thickness of 3.0mm, first pass deformation rate≤17%, last pass deformation rate≤9%.
Preferably, while standardizing first passage and extreme trace time rolling deformation rate, pony-roughing pass deformation rate is successively decreased.
Preferably, in control previous three passes Edge shape value, previous three passes Edge shape value is controlled as≤40N/
mm2。
Preferably, first 30~40N/mm of Edge shape value2, 10~30N/mm of second time Edge shape value2, the
Three -10~10N/mm of passage2。
Preferably, in the ROLLING OIL distributive value of the optimization operation of rolling, ROLLING OIL unilateral side distributive value is optimized for >=4500L/
min。
Preferably, in the mill speed for limiting each passage, the 1st passes speed≤100m/min, the 2nd passes
Speed≤200m/min, the 3rd passes speed≤300m/min, remaining pony-roughing pass≤500m/min, final pass rolling
Speed≤200m/min.
Preferably, the stainless steel wide cut cold plate is 300 series stainless steel wide cut cold plates.
The stainless steel wide cut cold plate obtained through the above way, especially 300 series stainless steel wide cut cold plates, away from edge
Local heat slid wound defect in 100-500mm is eliminated, to be reduced to because not conforming to rate caused by local heat slid wound defect
0.1% hereinafter, greatly improve the surface quality of stainless steel wide cut cold plate in turn.
Detailed description of the invention
In order to more clearly explain the embodiment of the invention or the technical proposal in the existing technology, to embodiment or will show below
There is attached drawing needed in technical description to be briefly described, it should be apparent that, the accompanying drawings in the following description is only this
Some embodiments of invention for those of ordinary skill in the art without creative efforts, can be with
It obtains other drawings based on these drawings.
Fig. 1 a is the photo of the local heat slid wound defect occurred in the 300 series stainless steel wide cut cold plate operations of rolling；
Fig. 1 b be roll shown in Fig. 1 a working roll after 300 series stainless steel wide cut cold plates correspond to local heat slid wound defect
Region surface situation photo；
Fig. 2 is the method schematic diagram eliminated stainless steel wide cut cold plate and roll local heat slid wound defect of the invention；
Fig. 3 is that the method that local heat slid wound defect is rolled using elimination stainless steel wide cut cold plate of the invention is produced
The photo of the edge situation of 304 stainless steel wide cut cold plates.
Specific embodiment
Define 1: herein, term " stainless steel wide cut cold plate " means width >=1500mm stainless steel cold-rolled plate.
Define 2: herein, term " 300 series stainless steel " means nickel chromium triangle system (Cr-Ni) stainless steel, such as mainly includes
301, the stainless steels such as 302,303,304,305,308,309,310,316,317,321,330,347.
Define 3: herein, term " local heat slid wound defect " means that upper and lower surface is away from two in stainless steel cold plate production process
The scratch defect along rolling direction distribution occurred in edge 100-500mm.
The method in order to better understand the present invention rolls localized heat below with 300 series stainless steel wide cut cold plates
The Crack cause of sliding injury defect and the specific embodiment for eliminating the heat slid wound defect do the method for the invention retouches in detail
It states.
So-called " short vertical-shaped " scratch defect occurred in the 300 series stainless steel wide cut cold plate operations of rolling is due to rolling
Caused by the rupture of oil film of process part, so-called " short vertical-shaped " scratch is also referred to as heat slid wound.It is stainless by observing and analyzing 300 series
Steel wide cut cold plate rolling scene discovery, being somebody's turn to do " short vertical-shaped " scratch defect is to be generated in former passages due to heat slid wound, the scratch
Depth of defect is deeper, and the subsequent operation of rolling elongates the defect, and can not eliminate, and specific " short vertical-shaped " scratch defect refers to Fig. 1 a institute
Show.
Fig. 1 b be roll shown in Fig. 1 a working roll after 300 series stainless steel wide cut cold plates correspond to local heat slid wound defect
Region surface situation photo.By observation working roll it is found that working roll also occurs circumferentially in corresponding region after rolling
The surface defect of pit shape, the Crack cause that can thus be concluded that wide cut cold plate rolls local heat slid wound defect is because rolling
The region oil film is thinning in the process or rupture, lubricating condition change, and becomes boundary lubrication, critical regions steel from mixed lubrication
Plate is directly contacted with working roll, and the zone plate shape is poor in the operation of rolling, without any lubrication, is directly contacted and is made with working roll
At heat slid wound, and this heat slid wound rolls can not also eliminate again by back pass.
According to heat slid wound defect Producing reason, proposing 300 is disappearing for stainless steel wide cut cold plate part heat slid wound defect
Except method, this method is related to rolling deformation rate, milled sheet shape curve, the control for rolling four oil mass, mill speed factors,
It is systemic with it is practical.Specifically, as shown in Fig. 2, elimination stainless steel wide cut cold plate of the invention rolls local heat slid wound
The method of defect includes:
First: specification 300 is that the first passage of wide cut cold plate and extreme trace time rolling deformation rate, pony-roughing pass deformation rate are successively decreased.
In the present invention, for example, can with reference to such as the following table 1 data for different material thickness and finished product thickness come the first passage of specification with
Extreme trace time rolling deformation rate.
Table 1: rolling deformation rate specification reference
Second: control previous three passes Edge shape value.
Previous three passes Edge shape value controls as≤40N/mm2, wherein first 30~40N/ of Edge shape value
mm2, 10~30N/mm of second time Edge shape value2, -10~10N/mm of third passage2。
Third: optimize the ROLLING OIL distributive value of the operation of rolling.
ROLLING OIL unilateral side distributive value is optimized for >=4500L/min by the 3500-4500L/min in currently available technology.
4th: limiting the mill speed of each passage.
1st passes speed≤100m/min, the 2nd passes speed≤200m/min, the 3rd passes speed≤
300m/min, remaining pony-roughing pass≤500m/min, final pass mill speed≤200m/min.
The method that elimination stainless steel wide cut cold plate above-mentioned for the present invention rolls local heat slid wound defect, specification therein are first
Passage and extreme trace time rolling deformation rate, control previous three passes Edge shape value, the ROLLING OIL distributive value for optimizing the operation of rolling, limitation
Any one factor in this four factors of the mill speed of each passage can reduce the severity or thorough of heat slid wound defect
Eliminate heat slid wound defect in bottom.Therefore, those skilled in the art preferably implement above-mentioned four factors simultaneously preferably to eliminate heat
Sliding injury defect, it should be noted however that by being adjusted to eliminate heat slid wound to any one of above-mentioned four factors
Defect also belongs to protection scope of the present invention.
Embodiment
The 304 stainless steel cold plates for being 1.5 × 1540mm by wide cut mill milling trimmed size, raw material are rolled by 4.0mm
To 1.5mm, 7 passages of rolling point are carried out.Local heat slid wound defect is rolled to eliminate stainless steel wide cut cold plate, is implemented of the invention
Eliminate the method that stainless steel wide cut cold plate rolls local heat slid wound defect, in which:
(1) first passage and extreme trace time rolling deformation rate: the 1st pass deformation rate 19.00%, the 7th pass deformation rate are standardized
9.00%, pony-roughing pass deformation rate is successively decreased, for example, the 2nd pass deformation rate 15.10%, the 3rd pass deformation rate the 13.47%, the 4th
Pass deformation rate 11.86%, the 5th pass deformation rate 10.19%, the 6th pass deformation rate 9.35%；
(2) previous three passes Edge shape value: the 1st passage 40N/mm is controlled2, the 2nd passage 20N/mm2, the 3rd passage 10N/
mm2；
(3) optimize the ROLLING OIL distributive value of the operation of rolling: ROLLING OIL unilateral side distributive value is optimized for 5200L/min；
(4) mill speed of each passage: the 1st passage 70m/min, the 2nd passage 150m/min, the 3rd passage 250m/ is limited
Min, the 4th passage 320m/min, the 5th passage 350m/min, the 6th passage 300m/min, the 7th passage 180m/min.
Cold line degreasing annealing is carried out after rolling, annealing rear surface is visually inspected, and surface of steel plate does not find that localized heat is sliding
Hurt surface defect, surface quality has reached desired effect, and for example, see Fig. 3, disappearing using the embodiment of the present invention is shown
Except the edge situation for the 304 stainless steel wide cut cold plates that the method that stainless steel wide cut cold plate rolls local heat slid wound defect produces
Photo.
Through the foregoing embodiment it is found that the beneficial effect for using the method for the invention is:
1: by each passes deformation rate of specification, especially first passage and extreme trace time rolling deformation rate can be balanced each
Passes pressure, prevent certain a time causes to cause rupture of oil film due to draught pressure is excessive because rolling deformation rate is excessive；
2: by controlling previous three passes Edge shape value, stainless steel wide cut cold plate draught pressure in the width direction can be reduced
Unbalanced distribution, obtain preferable milled sheet shape；
3: ROLLING OIL is for lubrication during the rolling process and cooling, by the way that ROLLING OIL distributive value is optimized for 5200L/min
This biggish ROLLING OIL distributive value facilitates the good lubrication of the operation of rolling and cooling, reduction rupture of oil film probability；
4: mill speed influences plate shape indirectly, by the way that the mill speed of each passage is limited to lesser mill speed, has
Help metal lateral flow, obtains preferable milled sheet shape.
It should be noted that, in this document, the relational terms of such as " first ", " second " or the like are used merely to one
Entity or operation are distinguished with another entity or operation, without necessarily requiring or implying between these entities or operation
There are any actual relationship or orders.
It should also be noted that, the above examples are only used to illustrate the technical scheme of the present invention, rather than its limitations；Although
Present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that: it still may be used
To modify to technical solution documented by previous embodiment or equivalent replacement of some of the technical features；And
These are modified or replaceed, the scope of the present invention that it does not separate the essence of the corresponding technical solution.
Claims (9)
1. a kind of method eliminated stainless steel wide cut cold plate and roll local heat slid wound defect comprising:
Standardize first passage and extreme trace time rolling deformation rate；
Control previous three passes Edge shape value；
Optimize the ROLLING OIL distributive value of the operation of rolling；
Limit the mill speed of each passage.
2. eliminating the method that stainless steel wide cut cold plate rolls local heat slid wound defect as described in claim 1, wherein standardizing
In first passage and extreme trace time rolling deformation rate: being the rolling that 3.5mm finished product thickness is 1.2mm for raw thickness, first passage becomes
Form quotient≤20%, last pass deformation rate≤11%；It is the rolling that 4.0mm finished product thickness is 1.5mm, first passage for raw thickness
Deformation rate≤19%, last pass deformation rate≤9%；It is the rolling that 4.5mm finished product thickness is 2.0mm, first road for raw thickness
Secondary deformation rate≤19%, last pass deformation rate≤9%；It is the rolling that 5.0mm finished product thickness is 2.5mm for raw thickness, it is first
Pass deformation rate≤18%, last pass deformation rate≤9%；It is the rolling that 5.5mm finished product thickness is 3.0mm for raw thickness,
First pass deformation rate≤17%, last pass deformation rate≤9%.
3. eliminating the method that stainless steel wide cut cold plate rolls local heat slid wound defect as claimed in claim 2, wherein standardizing
While first passage and extreme trace time rolling deformation rate, pony-roughing pass deformation rate is successively decreased.
4. eliminating the method that stainless steel wide cut cold plate rolls local heat slid wound defect as claimed in claim 2, wherein controlling
In previous three passes Edge shape value, previous three passes Edge shape value is controlled as≤40N/mm2。
5. eliminating the method that stainless steel wide cut cold plate rolls local heat slid wound defect as claimed in claim 4, wherein first
30~40N/mm of secondary Edge shape value2, 10~30N/mm of second time Edge shape value2, -10~10N/mm of third passage2。
6. eliminating the method that stainless steel wide cut cold plate rolls local heat slid wound defect as claimed in claim 2, wherein optimizing
In the ROLLING OIL distributive value of the operation of rolling, ROLLING OIL unilateral side distributive value is optimized for >=4500L/min.
7. eliminating the method that stainless steel wide cut cold plate rolls local heat slid wound defect as claimed in claim 2, wherein limiting
In the mill speed of each passage, the 1st passes speed≤100m/min, the 2nd passes speed≤200m/min, the 3rd
Secondary mill speed≤300m/min, remaining pony-roughing pass≤500m/min, final pass mill speed≤200m/min.
8. the method eliminated stainless steel wide cut cold plate and roll local heat slid wound defect as described in any one of claims 1 to 7,
Wherein use the raw material mill product specification with a thickness of 4.0mm for the 304 stainless steel cold plates of 1.5 × 1540mm, 7 passages of rolling point
It carries out, and wherein:
In standardizing first passage and extreme trace time rolling deformation rate, the 1st pass deformation rate 19.00%, the 2nd pass deformation rate
15.10%, the 3rd pass deformation rate 13.47%, the 4th pass deformation rate 11.86%, the 5th pass deformation rate the 10.19%, the 6th
Secondary deformation rate 9.35%, the 7th pass deformation rate 9.00%；
In control previous three passes Edge shape value, the 1st passage Edge shape value 40N/mm2, the 2nd passage Edge shape value 20N/
mm2, the 3rd passage Edge shape value 10N/mm2；
In the ROLLING OIL distributive value of the optimization operation of rolling, ROLLING OIL unilateral side distributive value is 5200L/min；
In the mill speed for limiting each passage, the 1st passes speed 70m/min, the 2nd passes speed 150m/min,
3rd passes speed 250m/min, the 4th passes speed 320m/min, the 5th passes speed 350m/min, the 6th
Secondary mill speed 300m/min, the 7th passes speed 180m/min.
9. the method eliminated stainless steel wide cut cold plate and roll local heat slid wound defect as described in any one of claims 1 to 7,
Wherein, the stainless steel wide cut cold plate is 300 series stainless steel wide cut cold plates.
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN112355061A (en) * | 2020-09-21 | 2021-02-12 | 山西太钢不锈钢股份有限公司 | 300-series stainless steel wide and thick cold plate shape control method |
| CN112474817A (en) * | 2020-11-16 | 2021-03-12 | 山西太钢不锈钢股份有限公司 | Method for controlling surface short wiping white mark defects of 430-series thick cold plate |
| CN112496050A (en) * | 2020-11-15 | 2021-03-16 | 山西太钢不锈钢股份有限公司 | Control method for eliminating defect of secondary cold rolling color difference of 400 series stainless steel |
| CN112974524A (en) * | 2021-02-23 | 2021-06-18 | 山西太钢不锈钢精密带钢有限公司 | Production method of 321 ultrathin stainless precision strip steel product |
| CN114011883A (en) * | 2021-10-18 | 2022-02-08 | 山西太钢不锈钢股份有限公司 | 300-series stainless steel BA plate bright furnace scratch defect control method |
| CN114762867A (en) * | 2021-01-15 | 2022-07-19 | 宝山钢铁股份有限公司 | Online treatment method for surface rolling defects |
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112355061A (en) * | 2020-09-21 | 2021-02-12 | 山西太钢不锈钢股份有限公司 | 300-series stainless steel wide and thick cold plate shape control method |
| CN112496050A (en) * | 2020-11-15 | 2021-03-16 | 山西太钢不锈钢股份有限公司 | Control method for eliminating defect of secondary cold rolling color difference of 400 series stainless steel |
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| CN114762867A (en) * | 2021-01-15 | 2022-07-19 | 宝山钢铁股份有限公司 | Online treatment method for surface rolling defects |
| CN114762867B (en) * | 2021-01-15 | 2024-07-12 | 宝山钢铁股份有限公司 | Online treatment method for surface rolling defects |
| CN112974524A (en) * | 2021-02-23 | 2021-06-18 | 山西太钢不锈钢精密带钢有限公司 | Production method of 321 ultrathin stainless precision strip steel product |
| CN114011883A (en) * | 2021-10-18 | 2022-02-08 | 山西太钢不锈钢股份有限公司 | 300-series stainless steel BA plate bright furnace scratch defect control method |
| CN114011883B (en) * | 2021-10-18 | 2023-03-31 | 山西太钢不锈钢股份有限公司 | 300-series stainless steel BA plate bright furnace scratch defect control method |
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