CN109013699A - A kind of production method of 2205 stainless steel roll bending - Google Patents
A kind of production method of 2205 stainless steel roll bending Download PDFInfo
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- CN109013699A CN109013699A CN201810677055.4A CN201810677055A CN109013699A CN 109013699 A CN109013699 A CN 109013699A CN 201810677055 A CN201810677055 A CN 201810677055A CN 109013699 A CN109013699 A CN 109013699A
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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
- B21B1/30—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 non-continuous process
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B2201/00—Special rolling modes
- B21B2201/06—Thermomechanical rolling
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Abstract
The present invention relates to a kind of production methods of 2205 stainless steel roll bendings, the step of this method, is as follows: 2205 slabs of steel continuous casting tapping 220mm processed, 2205 slabs are packed into heating furnace and carry out first time calendering, calendering is divided into two passages, first passage is rolled into the slab of 205mm, and the second passage is rolled into the slab of 190mm, then carries out cooling by water to the slab of 190mm, after being cooled to room temperature, it is returned to heating furnace entrance and waits second and roll；The slab of 190mm is packed into heating furnace and carries out second of calendering, is calendered to the intermediate base of 28mm；Finish rolling calendering is carried out to the intermediate base of 28mm, the thickness for being calendered to needs is batched later, coiling temperature≤780 DEG C, up to 2205 stainless steel roll bendings after the completion of curling.Production method of the invention is stablized, and the 2205 stainless steel scrolls produced are outstanding, and convenient for cutting, and this method can be effectively reduced side and split and the case where plate face crackle.
Description
Technical field
The present invention relates to rings domains processed, more particularly to a kind of production method of 2205 stainless steel roll bendings.
Background technique
Representative steel grade of 2205 stainless steels as two phase stainless steel, there are ferrites and two kinds of austenite mutually to tie inside steel grade
Structure has outstanding anti-spot corrosion and crevice corrosion performance.Nickel is replaced by high nitrogen, greatly reduces cost of material, is had very high
Product rentability.The common austenitic stainless steel of the yield strength ratio of 2205 two phase stainless steels doubles more, this characteristic makes to set
Meter person mitigates weight in deisgn product, can be widely applied to large scale industry container, pipeline etc..But in actual production process,
2205 steel grades in 800~900 DEG C of regions are easy that σ phase is precipitated, while under cold state, and 2205 have very high yield strength,
Thickness is bigger, and yield strength is bigger, batches difficulty, even if batching completion, but black volume scroll is poor, in subsequent production, is easy to make
Friction mark between stratification, while 2205 stainless steel sides are split and plate face crackle occurs obviously, lumber recovery and certified product rate are lower, integral benefit
Property is low.
The normal rolling mill practice of 2205 stainless steels are as follows: heating of plate blank --- batch, and edge is sent out after hot rolling by roughing --- finish rolling ---
Raw zigzag side is split, and crackle is in extend internally, the most deep 50mm that can extend internally from edge.The main reason for generation is in steel grade
There are ferrite and austenite phase, two kinds of phase structures elongation percentage in rolling is inconsistent in portion, is easy to occur at two kinds of interfaces
Crackle, crackle is gradually increased in the operation of rolling, is formed side in edge and is split, forms crackle on surface.Original 220mm slab passes through the
Once when being calendered to 190mm slab, be conducive to make the continuous casting billet structure inside raw sheet base to be changed to hot rolling microstructure, crystal grain refinement, together
When be calendered to after 190mm slab and have enough time so that crystal grain is replied, dislocation power is effectively reduced, when rolling for second, effectively
Reduction side is split and face crack.
In order to guarantee client's width demand, generally requires and carry out edge trimming processing, so slab tapping width needs to increase
Add, causes the casting yield of 2205 stainless steels relatively low.If two sides edge needs to cut off each 40mm, according to client's 1500mm order meter
It calculates, casting yield caused by excision side is split is lost: 80mm/ (80+1500) mm=5.1%.It calculates, needs according to 25ton slab weight
Cut off 1.25ton.
When 2205 stainless steels are according to normal process operation, while splitting, generation is more, and casting yield loss is big；Simultaneously in finish rolling operation
When, in order to guarantee calendering to neutrality, finish rolling side, which is led, to be used, while when splitting larger and finish rolling side leads and collides, be easy to cause
It is fallen while splitting, causes relic indentation and hot rolling roll marks, when serious, cause hot rolling operation to fail, entirely roll up waste disposal, influence heat
Roll normal work.
Summary of the invention
The technical issues of solution: it is big for yield strength existing for existing 2205 stainless steel, batch difficult, scroll is poor,
Be also easy to produce crackle, the disadvantages of falling off, is split on easy side, the present invention provides a kind of production method of 2205 stainless steel roll bendings, this method production
Stablize, the 2205 stainless steel scrolls produced are outstanding, are also convenient for cutting, and 2205 stainless steel sides can be effectively reduced in this method
It splits and the case where plate face crackle.
Technical solution: a kind of production method of 2205 stainless steel roll bendings, the step of this method, are as follows:
Step 1: 2205 slabs are packed into heating furnace and carry out first time pressure by 2205 slabs of steel continuous casting tapping 220mm processed
Prolong, calendering is divided into two passages, and the first passage is rolled into the slab of 205mm, and the second passage is rolled into the slab of 190mm, then right
The slab of 190mm carries out cooling by water, after being cooled to room temperature, is returned to heating furnace entrance and waits second and roll；
Roll step 2: the slab of 190mm is packed into heating furnace and carries out second, is calendered to the intermediate base of 28mm；
Step 3: the intermediate base to 28mm carries out finish rolling calendering, the thickness for being calendered to needs is batched later, batches temperature
≤ 780 DEG C of degree, up to 2205 stainless steel roll bendings after the completion of curling.
First time rolling temperature is 1240 DEG C in the first step described above, is arranged in backmost one piece of roller unit, is utilized
The Finish Mill Roll Changing time is rolled, and is not had an impact to production.
Second passage rolling temperature is 1240 DEG C in the first step described above.
Furnace temp is set as 1260 DEG C when second of calendering in second step described above.
Temperature when carrying out finish rolling calendering in third step described above to the intermediate base of 28mm is 1240 DEG C.
In third step described above in curling, it is 750 DEG C that layer temperature is batched in control, batches to use and helps volume, strong manually
It is led by side is batched, by steel band edge and batches side and lead fitting operation, coiling speed 90mpm, middle part to tail portion coiling clamp roller
Goal-setting is 10~14ton, and coiling tension increases by 30% at this time.
The utility model has the advantages that a kind of production method of 2205 stainless steel roll bending provided by the invention, the production method is raw for roll bending
It produces, improves production efficiency, reduce production cost；Meanwhile the production method can effectively eliminate interfacial friction, improve product matter
Amount, reduce rejection rate, the later period in use, can arbitrarily arrange according to demand segmentation length, meet client's different demands, greatly reduce
Waste and limitation when in use；Also, the production method can effectively reduce 2205 stainless steel sides and split and the feelings of plate face crackle
Condition, therefore in the case where improvement is split on 2205 stainless steel sides, when finish rolling operation, can reduce indentation caused by side in hot rolling is split and heat
Operation failure is rolled, waste is reduced.
Specific embodiment
Embodiment 1
A kind of the step of production method of the 2205 stainless steel roll bendings of 12mm, this method, is as follows:
Step 1: 2205 slabs are packed into heating furnace and carry out first time pressure by 2205 slabs of steel continuous casting tapping 220mm processed
Prolong, calendering is divided into two passages, and the first passage is arranged in backmost one piece of roller unit, is in temperature using the Finish Mill Roll Changing time
The slab of 205mm is rolled at 1240 DEG C, the second passage is rolled into the slab of 190mm at being 1240 DEG C in temperature, then right
The slab of 190mm carries out cooling by water, after being cooled to room temperature, is returned to heating furnace entrance and waits second and roll；
Roll step 2: the slab of 190mm is packed into and carries out second at heating furnace is 1260 DEG C in temperature, is calendered to
The intermediate base of 28mm；
Step 3: to the intermediate base of 28mm be 1240 DEG C in temperature at carry out finish rolling calendering, rolled up after being calendered to 12mm
Take, it is 750 DEG C that layer temperature is batched in control, is batched using helping volume, lead manually by batching side by force, by steel band edge with batch side and lead patch
Cooperate industry, coiling speed 90mpm, the coiling clamp roller goal-setting of middle part to tail portion is 12ton, up to 2205 after the completion of curling
Stainless steel roll bending.
Embodiment 2
A kind of the step of production method of the 2205 stainless steel roll bendings of 10mm, this method, is same as Example 1, and difference is
It is batched after being calendered to 10mm to the intermediate base finish rolling of 28mm in three steps.
Embodiment 3
A kind of the step of production method of the 2205 stainless steel roll bendings of 6mm, this method, is same as Example 1, and difference is
It is batched after being calendered to 6mm to the intermediate base finish rolling of 28mm in three steps.
Embodiment 4
A kind of the step of production method of the 2205 stainless steel roll bendings of 3.5mm, this method, is same as Example 1, and difference is
It is batched after being calendered to 3.5mm to the intermediate base finish rolling of 28mm in third step.
Comparative example 1
A kind of the step of production method of 2205 stainless steel materials of 12mm, this method, is as follows:
Step 1: 2205 slabs of steel continuous casting tapping 220mm processed, 2205 slabs loading heating furnace is heated, is heated
Temperature is set as 1280 DEG C, is directly calendered to the intermediate base of 30mm；
Step 2: the intermediate base to 30mm carries out finish rolling calendering at 1255 DEG C, after being calendered to 12mm, pass through hot-rolling flying shears
Carry out the plate for being cut into 6~12m, plate be transferred to platform and is cooled down, be cooled to room temperature it is rear up to 12mm 2205 not
Become rusty steel board.
2205 stainless steel plates that the 2205 stainless steel roll bendings and comparative example 1 that 1~embodiment of above-described embodiment 4 produces produce
The technical performance index of material, testing result are as follows:
2205 stainless steel materials of the 12mm produced in comparative example 1, the production method can only be carried out according to 6~12m is fixed
Cutting, single output is small, and production efficiency is lower, simultaneously because can only regular length produced, cause in actual use by
Product length limitation is big, part particular length demand in use, caused by waste it is more.
The embodiment of the present invention has been described in detail above, for those of ordinary skill in the art, according to the present invention
The thought of embodiment, there will be changes in the specific implementation manner and application range, in conclusion the content of the present specification is not
It is interpreted as limitation of the present invention.
Claims (6)
1. a kind of production method of 2205 stainless steel roll bendings, it is characterised in that the step of this method is as follows:
Step 1: 2205 slabs are packed into heating furnace and carry out first time calendering, pressure by 2205 slabs of steel continuous casting tapping 220mm processed
Prolong and be divided into two passages, the first passage is rolled into the slab of 205mm, and the second passage is rolled into the slab of 190mm, then to 190mm
Slab carry out cooling by water, after being cooled to room temperature, be returned to heating furnace entrance and wait second to roll；
Roll step 2: the slab of 190mm is packed into heating furnace and carries out second, is calendered to the intermediate base of 28mm；
Step 3: the intermediate base to 28mm carries out finish rolling calendering, the thickness for being calendered to needs is batched later, coiling temperature≤
780 DEG C, up to 2205 stainless steel roll bendings after the completion of curling.
2. a kind of production method of 2205 stainless steel roll bending according to claim 1, it is characterised in that: in the first step
First time rolling temperature is 1240 DEG C, is arranged in backmost one piece of roller unit, is rolled using the Finish Mill Roll Changing time.
3. a kind of production method of 2205 stainless steel roll bending according to claim 1, it is characterised in that: in the first step
Second passage rolling temperature is 1240 DEG C.
4. a kind of production method of 2205 stainless steel roll bending according to claim 1, it is characterised in that: in the second step
Furnace temp is set as 1260 DEG C when second of calendering.
5. a kind of production method of 2205 stainless steel roll bending according to claim 1, it is characterised in that: in the third step
Temperature when carrying out finish rolling calendering to the intermediate base of 28mm is 1240 DEG C.
6. a kind of production method of 2205 stainless steel roll bending according to claim 1, it is characterised in that: in the third step
In curling, it is 750 DEG C that layer temperature is batched in control, is batched using helping volume, is led manually by batching side by force, by steel band edge with batch
Fitting operation, coiling speed 90mpm are led in side, and the coiling clamp roller goal-setting of middle part to tail portion is 10~14ton.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810677055.4A CN109013699A (en) | 2018-06-27 | 2018-06-27 | A kind of production method of 2205 stainless steel roll bending |
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| CN201810677055.4A CN109013699A (en) | 2018-06-27 | 2018-06-27 | A kind of production method of 2205 stainless steel roll bending |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110756597A (en) * | 2019-10-17 | 2020-02-07 | 浦项(张家港)不锈钢股份有限公司 | Cooling method for double-phase stainless steel hot-rolled plate strip |
| CN113210428A (en) * | 2021-04-21 | 2021-08-06 | 鞍钢联众(广州)不锈钢有限公司 | Double-phase stainless steel hot-rolling coiling method |
Citations (4)
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| CN103710507A (en) * | 2013-12-31 | 2014-04-09 | 振石集团东方特钢股份有限公司 | Method for preparing low-nickel duplex stainless steel hot-rolled coil |
| CN104531964A (en) * | 2014-11-28 | 2015-04-22 | 振石集团东方特钢股份有限公司 | Production method of high performance duplex stainless steel hot rolled coil |
| CN105886956A (en) * | 2016-07-01 | 2016-08-24 | 东北大学 | Economical duplex stainless steel sheet and preparation method thereof |
| CN107904520A (en) * | 2017-10-18 | 2018-04-13 | 江苏理工学院 | A kind of diphase stainless steel alloy material and its manufacture method |
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2018
- 2018-06-27 CN CN201810677055.4A patent/CN109013699A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103710507A (en) * | 2013-12-31 | 2014-04-09 | 振石集团东方特钢股份有限公司 | Method for preparing low-nickel duplex stainless steel hot-rolled coil |
| CN104531964A (en) * | 2014-11-28 | 2015-04-22 | 振石集团东方特钢股份有限公司 | Production method of high performance duplex stainless steel hot rolled coil |
| CN105886956A (en) * | 2016-07-01 | 2016-08-24 | 东北大学 | Economical duplex stainless steel sheet and preparation method thereof |
| CN107904520A (en) * | 2017-10-18 | 2018-04-13 | 江苏理工学院 | A kind of diphase stainless steel alloy material and its manufacture method |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110756597A (en) * | 2019-10-17 | 2020-02-07 | 浦项(张家港)不锈钢股份有限公司 | Cooling method for double-phase stainless steel hot-rolled plate strip |
| CN113210428A (en) * | 2021-04-21 | 2021-08-06 | 鞍钢联众(广州)不锈钢有限公司 | Double-phase stainless steel hot-rolling coiling method |
| CN113210428B (en) * | 2021-04-21 | 2022-02-25 | 鞍钢联众(广州)不锈钢有限公司 | Double-phase stainless steel hot-rolling coiling method |
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| CB02 | Change of applicant information |
Address after: 215625 Puxiang (Zhangjiagang) Stainless Steel Co., Ltd. on the north side of the Yangtze River Highway, Jinfeng Town, Zhangjiagang City, Suzhou City, Jiangsu Province Applicant after: Puxiang (Zhangjiagang) Stainless Steel Co., Ltd. Address before: 215625 Zhangjiagang Puxiang Stainless Steel Co., Ltd. on the north side of the Yangtze River Highway in Jinfeng Town, Zhangjiagang City, Suzhou City, Jiangsu Province Applicant before: Puxiang Stainless Steel Co Ltd, Shangjiagang |
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Application publication date: 20181218 |
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| RJ01 | Rejection of invention patent application after publication |