CN106269868A - Long product rolling production line and production technology thereof - Google Patents
Long product rolling production line and production technology thereof Download PDFInfo
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- CN106269868A CN106269868A CN201610715937.6A CN201610715937A CN106269868A CN 106269868 A CN106269868 A CN 106269868A CN 201610715937 A CN201610715937 A CN 201610715937A CN 106269868 A CN106269868 A CN 106269868A
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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
- B21B1/46—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
- B21B1/466—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 non-continuous process, i.e. the cast being cut before rolling
-
- 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
- B21B1/16—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 wire rods, bars, merchant bars, rounds wire or material of like small cross-section
- B21B1/18—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 wire rods, bars, merchant bars, rounds wire or material of like small cross-section in a continuous process
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Metal Rolling (AREA)
Abstract
The invention discloses a kind of long product rolling production line and production technology thereof, belong to rolling bar technical field, production line includes passing sequentially through conticaster, withdrawal straightening machine that roller-way connects, rolls front accident scissors, roughing mills, crop flying shear, intermediate mill, mm finishing mill unit, subtracts sizing and cold bed, described conticaster is unit strand casting machine, and the roller-way between described conticaster and roughing mills is insulating roller way.Production technology includes that the insulation of unit single current continuous casting, conveyor roller, withdrawal straightening machine aligning, roughing mills rolling, intermediate mill rolling, mm finishing mill unit rolling, reducing-sizing mill rolling and cooling are collected.The present invention uses unit strand casting machine directly to roll after casting out round base, reduces intermediate step and heat-energy losses, it is achieved endless rolling, saves heating furnace simultaneously, reduces the fault rate in production process.
Description
Technical field
The invention belongs to rolling bar technical field, be specifically related to a kind of long product rolling production line and production technology thereof.
Background technology
The production method that wire and rod is conventional at present is to use multiple-strand caster to produce small billet or roundlet base, is cut by strand
Sending roller-way to deliver to heating furnace by heat after cutting, heating furnace is delivered to milling train after being heated by strand and is rolled.Concrete technology flow process is such as
Under: conticaster → withdrawal straightening machine → cutting machine → conveyor roller → machine for moving steel → point steel machine → heat send roller-way → heating furnace stand → add
Hot stove → roughing mills → intermediate mill → mm finishing mill unit → collection device.Wherein, multithread strand need to be moved by machine for moving steel in batches
Deliver on point steel machine frame, then sent on roller-way by dividing a steel machine to be placed into heat by root, send roller transport to carry out to heating furnace by heat
Heating, delivers to mill and rolls after heating.There is more problem and shortage in this production method: 1) multithread strand
It is fed sequentially to after collection that mill flow process is complicated, the time is long；2) production procedure length, temperature loss height, if directly heat is sent, to rolling
During machine entrance, temperature is the lowest causes milling train power to be significantly increased.
For solving the problems referred to above, many experts and scholars propose multiple method.Patent of invention " is used for producing Bar Wire Product and type
The continuous casting of material-Direct Rolling device and method " (CN104550237A) propose the continuous-casting continuous-rolling method of section bar Bar Wire Product, but by
In blank by conticaster to roughing mills, simply use thermal insulation cover to be incubated, can be down to roughing mills blank surface temperature
About 900 DEG C, core temperature also only 950 DEG C, it is impossible to realize excellent special steel rolling requirements.Patent of invention " utilizes residual heat of molten steel raw
Produce the continuous-casting continuous-rolling method of section bar Bar Wire Product " (CN102310078A) propose the continuous-casting continuous-rolling method of section bar Bar Wire Product, but by
In continuous casting billet without cut-out, there is production line output when employing single current produces too low, when using multithread to produce milling train too much, investment
Excessive shortcoming.Patent of invention " a kind of device and production method thereof producing reinforcing bar without heating zerolling small billet "
(CN103480647A) although eliminating heating furnace, but this device uses, and continuous casting billet is multiple rows of parallel, divided by horizontal deployment device again
After steel, single heat of sending into send the mode of roller-way, can enter that the hot continuous casting billet waiting time sending roller-way is long and temperature drop mistake after causing
Greatly, and due to traversing point of steel of needs, the cool time of continuous casting billet is too increased, it is seen that this device send heat with the most conventional heat
Packing technique there is no essential distinction, and continuous casting billet temperature drop is excessive, it is impossible to meets the rolling requirements of milling train, does not have feasibility.Invention is specially
Profit " producing the continuous casting and rolling device of long material " (CN202667242U) uses roller hearth type heating furnace to heat continuous casting billet, although cancel
Traditional heating stove, but have that equipment investment is high, produce still consume more electric energy or fuel, problem that oxidization burning loss is bigger.
It is therefore desirable to design a kind of continuous casting and rolling production line for production line bar, to overcome the problems referred to above.
Summary of the invention
In view of this, it is an object of the invention to provide a kind of long product rolling production line and production technology thereof, use unit
Roundlet base produced by strand casting machine, cancels traditional heating stove, makes full use of continuous casting billet metallurgy heat energy, can be substantially reduced wire and rod
Energy consumption, reduces oxidation consumption, improves lumber recovery；And by rolling preincubation device, promote that strand core and skin temperature are uniform,
Use controlled rolling and control cooling, improving wire and rod properties of product.
For reaching above-mentioned purpose, an object of the present invention is achieved through the following technical solutions:
A kind of long product rolling production line, including passing sequentially through conticaster, withdrawal straightening machine that roller-way connects, rolling front accident scissors, thick
Milling train group, crop flying shear, intermediate mill, mm finishing mill unit, subtracting sizing and cold bed, described conticaster is unit strand casting machine, institute
Stating the roller-way between conticaster and roughing mills is insulating roller way, and described insulating roller way is provided with the guarantor being fixed on roller-way both sides
Temperature cover and the Medium Frequency Induction Heating Furnace being fixed in thermal insulation cover.
Further, described insulating roller way is provided with 1～5 to floating niproll.
Further, described insulating roller way is horizontal roller, conticaster and the L-shaped setting of follow-up rolling line.
Further, described insulating roller way is for tilting roller-way, and conticaster and follow-up rolling line are arranged in " S " type.
Further, casting blank of continuous casting machine centrage and rolling centerline are angle 0～90 ° of settings.
The two of the purpose of the present invention are achieved through the following technical solutions:
Use the production technology of above-mentioned long product rolling production line, including unit single current continuous casting, conveyor roller insulation, withdrawal straightening machine
Aligning, roughing mills rolling, intermediate mill rolling, mm finishing mill unit rolling, reducing-sizing mill rolling and cooling collect, continuous casting line with
Roll line is in 0～90 ° of tinuous production arranged, the speed of tinuous production, on the basis of withdrawal straightening machine pulling rate, cascades speed governing
Use upstream inverse tune, downstream along adjusting, specifically include following steps:
1) continuous casting: use unit strand casting machine to produce circle base, and steadily transport under floating niproll balanced action；
2) roller-way insulation: circle base is carried out heating and thermal insulation, continuous casting by the Medium Frequency Induction Heating Furnace arranged in insulating roller way
When machine blank centrage absolute altitude out is identical with rolling centerline absolute altitude, then insulating roller way is horizontal roller, conticaster with after
Continuous rolling line is L-shaped；When conticaster blank centrage absolute altitude out is different from rolling centerline absolute altitude, then insulating roller way is for inclining
Cross roll road, conticaster and follow-up rolling line are in " S " type；
3) rolling: use the mode of horizontally and vertically alternative rolling to step 2) justify base and carry out multi-pass roughing mills, middle milling train
Group and mm finishing mill unit rolling；
4) finish to gauge: to step 3) rolled piece after rolling is controlled cooling, uses mm finishing mill unit finish rolling afterwards or with subtracting calmly
Footpath unit subtracts sizing setting and obtains finished product；
5) cooling collect: to step 4) rolling after finished product be controlled cooling and collect.
Further, step 2) and 3) between, it is additionally provided with and rolls front accident scissors operation.
Further, step 1) in, casting rate is 1.5m/min～8m/min, circle base a diameter of Φ 120mm～Φ
200mm。
Further, step 3) in, control every time deformation temperature be 800 DEG C～1100 DEG C, lengthening coefficient be 1.05～
1.45, spread coefficient is 0.05～0.45；The speed of service controlling circle base is 0.1m/s～20.0m/s.
The beneficial effects of the present invention is:
The present invention uses unit strand casting machine directly to roll after casting out round base, decreases intermediate step, it is to avoid
Heat-energy losses, it is achieved endless rolling, meanwhile, saves heating furnace, reduces the fault rate in production process, be beneficial to improve lumber recovery；
It addition, by the insulation before rolling, the concordance of strand core and skin temperature can be made, it is beneficial to improve rolling quality and become moral character
Energy.
Accompanying drawing explanation
Fig. 1 is one long product rolling production-line arrangement figure of the present invention；
Fig. 2 be insulating roller way be tilt roller-way duration material rolling line layout drawing；
Fig. 3 is the angle schematic diagram of conticaster and rolling line.
Reference:
1-conticaster；2-withdrawal straightening machine；3-insulating roller way；4-rolls front accident scissors；5-roughing mills；6-crop flying shear I；In 7-
Milling train group；8-rolls, finish rolling and water cooling box after subtracting sizing；9-crop flying shear II；10-mm finishing mill unit；11-crop flying shear III；
12-subtracts sizing；13-crop flying shear IV；14-cold bed.
Detailed description of the invention
Below in conjunction with accompanying drawing, the preferred embodiments of the present invention are described in detail.
Invention one: long product rolling production line
As it is shown in figure 1, a kind of long product rolling production line that the present invention provides, including passing sequentially through the conticaster that roller-way connects
1, withdrawal straightening machine 2, roll front accident scissors 4, roughing mills 5, crop flying shear I 6, intermediate mill 7, in roll, finish rolling and water-cooled after subtracting sizing
Case 8, crop flying shear II 9, mm finishing mill unit 10, crop flying shear III 11, subtract sizing 12, crop flying shear IV 13 and cold bed 14, even
Casting machine 1 is unit strand casting machine, and the roller-way between conticaster 1 and roughing mills 5 is insulating roller way 3, and insulating roller way 3 is arranged
The thermal insulation cover being fixed on roller-way both sides and the Medium Frequency Induction Heating Furnace (not shown) being fixed in thermal insulation cover, circle base is had to run
Journey exists heat loss, by Medium Frequency Induction Heating Furnace heating compensation, it is ensured that it is in can be in rolling temperature range, meanwhile, logical
Cross thermal insulation cover and can prevent thermal loss.
In the present embodiment, insulating roller way is provided with 1～5 to floating niproll (not shown), due to floating niproll
Can float in the same direction, can solve that niproll load is uneven and the velocity perturbation problem of buffering milling train and conticaster.
In the present embodiment, when conticaster blank centrage absolute altitude out is identical with rolling centerline absolute altitude, insulating roller way
For horizontal roller, conticaster and the L-shaped setting of follow-up rolling line, for long material field, it is however generally that, rolling line be arranged in overhead
On platform, but long material engineering design in early days, also have in horizontal plane layout, " L " type arranges and is applicable to be arranged at height
Body panel and two kinds of arrangements of horizontal plane.
In the present embodiment, when conticaster blank centrage absolute altitude out and rolling centerline absolute altitude differ, thermal-insulation roller
Road is for tilting roller-way, and conticaster and follow-up rolling line are arranged in " S " type.
In the present embodiment, casting blank of continuous casting machine centrage and rolling centerline are angle 0～90 ° of settings, mainly consider reality
Space in engineering design is arranged, if space is sufficiently large, and continuous casting billet consistent with rolling centerline direction (0 °), can but also have
Can be for saving roll line director space, with roll line direction at an angle, maximum in 90 °, now strand needs elder generation to conticaster
Turn 90 ° carry out follow-up rolling again, if it is considered that direction is exactly-90 °～90 ° or 0～180 °, do not consider direction be 0～
90 °, to meet the requirement in different engineering design spaces.
Invention two: use the production technology of aforementioned long product rolling production line
Embodiment 1
With reference to Fig. 1 and Fig. 3, production technology includes the insulation of unit single current continuous casting, conveyor roller, withdrawal straightening machine aligning, roughing mill
Group rolling, intermediate mill rolling, mm finishing mill unit rolling, reducing-sizing mill rolling and cooling are collected, and continuous casting line and roll line are flat
The tinuous production that row is arranged, the speed of tinuous production is on the basis of withdrawal straightening machine pulling rate, and cascade speed governing uses upstream inverse tune,
Downstream along adjusting, regulated the speed change by dancer (being similar to kink), play the effect of stabilized speed, it is ensured that speed is smart
Degree, specifically includes following steps:
(1) continuous casting: using unit strand casting machine to produce circle base, the casting rate of conticaster is 1.5m/min～8m/
Min, the diameter of section of circular strand is Φ 120mm～Φ 200mm；1～5 arranged on the follow-up roller-way of conticaster are to the folder that floats
Hold roller can float in the same direction, to solve to ask with the velocity perturbation of niproll load problem of non-uniform and buffering milling train and conticaster
Topic；
(2) roller-way insulation: conticaster blank centrage absolute altitude out is identical with rolling centerline absolute altitude, casting blank of continuous casting machine
Centrage is identical with rolling centerline direction, and insulating roller way is horizontal roller, and conticaster is L-shaped with follow-up rolling line；In transport
Roller-way arranges thermal insulation cover and Medium Frequency Induction Heating Furnace and circle base is incubated and is heated, it is ensured that circle base enters rolling mill temperature and temperature
Uniformity；
(3) roll front accident scissors: accident scissors is set before milling train, rolled piece during to solve conticaster fault, steel-fastening or rolling line fault
Heap steel problem；
(4) thick, in, mm finishing mill unit rolling: use the mode of horizontally and vertically alternative rolling that the steel billet after step (2) is carried out multiple tracks
Secondary roughing mills, intermediate mill and mm finishing mill unit rolling, be equipped with guide and guard before and after each rolling mill during rolling, roughing mills and in
Milling train group is equipped with flying shear after having rolled, controlling every time deformation temperature in the operation of rolling is 800 DEG C～1100 DEG C, every time
Lengthening coefficient be 1.05～1.45, every time spread coefficient is 0.05～0.45, and in the operation of rolling, the steel billet speed of service is
0.1m/s～20.0m/s；
(5) mm finishing mill unit finished product rolls or subtracts fixed diameter rolling: the rolled piece after rolling step (3) is first controlled cold
But, then carry out mm finishing mill unit rolling or reducing-sizing mill carries out low temperature big pressure deformation, it is thus achieved that final size product.
(6) cooling is collected: rolled piece is after mm finishing mill unit or reducing-sizing mill roll, and rolled piece is controlled cooling, to obtain
Preferable microscopic structure and preferably product mechanical performance, rolled piece, after cold bed cools down, is collected, and for wire rod, rolled piece is through telling
Silk machine laggard enter air-cooled line be controlled cooling, subsequently carry out collection retracting collection.
Embodiment 2
With reference to Fig. 2 and Fig. 3, casting blank of continuous casting machine centrage and rolling centerline direction are 90 ° and set as different from Example 1
Putting, insulating roller way, for tilting roller-way, solves the problem that blank centrage absolute altitude is different from rolling centerline absolute altitude.
Embodiment 3
With reference to Fig. 1 and Fig. 3, conticaster blank centrage absolute altitude out and rolling centerline as different from Example 1
Absolute altitude is different, and conticaster and follow-up rolling line are in " S " type, and the long product rolling line all devices after S type mainly considers conticaster exists
On scaoffold arrange, its rolling centerline is different from roller-way horizontal plane after conticaster, be equivalent to steel from continuous casting machine casting out after
Strand is climbed, and then rolls, and strand is similar to S through conticaster continuous casting and climbing process subsequently, because being referred to herein as " S " type.
Embodiment 4
With reference to Fig. 2 and Fig. 3, conticaster and follow-up rolling line are in " S " type as different from Example 2, to solve rolling center
The problem that line is different from roller-way horizontal plane after conticaster.
Have the advantage that relative to prior art
1) using circle base rolling and complete stroke thermal insulating, strand uniformity and rolling quality to improve, the material property of finished product obtains
Promote；
2) use unit single current continuous casting mode, remove heating furnace from, it is achieved that endless rolling；
3) use endless rolling, reduce the fault rate in production process, improve lumber recovery；
4) use endless rolling, it is not necessary to heating furnace reheats insulation, reduce energy resource consumption；
5) taking the mode of continuous casting and rolling, making foudry line and roll line is a tinuous production, production line contraction in length, raw
Producing line investment to reduce, use cost reduces.
Finally illustrate, preferred embodiment above only in order to technical scheme to be described and unrestricted, although logical
Cross above preferred embodiment the present invention to be described in detail, it is to be understood by those skilled in the art that can be
In form and it is made various change, without departing from claims of the present invention limited range in details.
Claims (9)
1. a long product rolling production line, it is characterised in that: before including passing sequentially through conticaster, withdrawal straightening machine that roller-way connects, rolling
Accident scissors, roughing mills, crop flying shear, intermediate mill, mm finishing mill unit, subtracting sizing and cold bed, described conticaster is unit single current
Conticaster, the roller-way between described conticaster and roughing mills is insulating roller way, described insulating roller way is provided with and is fixed on roller
The thermal insulation cover of both sides, road and the Medium Frequency Induction Heating Furnace being fixed in thermal insulation cover.
Long product rolling production line the most according to claim 1, it is characterised in that: it is provided with 1～5 in described insulating roller way right
Floating niproll.
Long product rolling production line the most according to claim 1, it is characterised in that: described insulating roller way is horizontal roller, even
Casting machine and the L-shaped setting of follow-up rolling line.
Long product rolling production line the most according to claim 1, it is characterised in that: described insulating roller way is for tilting roller-way, even
Casting machine and follow-up rolling line are arranged in " S " type.
Long product rolling production line the most according to claim 1, it is characterised in that: casting blank of continuous casting machine centrage and rolling center
Line is angle 0～90 ° of settings.
6. use the production technology of the arbitrary described long product rolling production line of claim 1-5, it is characterised in that: include unit single current
The insulation of continuous casting, conveyor roller, withdrawal straightening machine aligning, roughing mills rolling, intermediate mill rolling, mm finishing mill unit rolling, reducing sizing mill
Group rolling and cooling are collected, and continuous casting line and roll line are in 0～90 ° of tinuous production arranged, the speed of tinuous production with
On the basis of withdrawal straightening machine pulling rate, cascade speed governing uses upstream inverse tune, downstream along adjusting, specifically includes following steps:
1) continuous casting: use unit strand casting machine to produce circle base, and steadily transport under floating niproll balanced action；
2) roller-way insulation: by the Medium Frequency Induction Heating Furnace arranged in insulating roller way, circle base being carried out heating and thermal insulation, conticaster goes out
When next blank centrage absolute altitude is identical with rolling centerline absolute altitude, then insulating roller way is horizontal roller, and conticaster rolls with follow-up
Line is L-shaped；When conticaster blank centrage absolute altitude out is different from rolling centerline absolute altitude, then insulating roller way is tilting roller
Road, conticaster and follow-up rolling line are in " S " type；
3) rolling: use horizontally and vertically alternative rolling mode to step 2) justify base carry out multi-pass roughing mills, intermediate mill and
Mm finishing mill unit rolls；
4) finish to gauge: to step 3) rolled piece after rolling is controlled cooling, uses mm finishing mill unit finish rolling or use reducing sizing mill afterwards
Group subtracts sizing setting and obtains finished product；
5) cooling collect: to step 4) rolling after finished product be controlled cooling and collect.
Production technology the most according to claim 6, it is characterised in that: step 2) and 3) between, it is additionally provided with and rolls front accident
Cut operation.
Production technology the most according to claim 6, it is characterised in that: step 1) in, casting rate is 1.5m/min～8m/
Min, circle base a diameter of Φ 120mm～Φ 200mm.
Production technology the most according to claim 6, it is characterised in that: step 3) in, the deformation temperature controlling every time is
800 DEG C～1100 DEG C, lengthening coefficient be 1.05～1.45, spread coefficient be 0.05～0.45；The speed of service controlling circle base is
0.1m/s～20.0m/s.
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| CN201610715937.6A CN106269868A (en) | 2016-08-24 | 2016-08-24 | Long product rolling production line and production technology thereof |
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ID=57616043
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Cited By (18)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107185968A (en) * | 2017-06-21 | 2017-09-22 | 北京科技大学 | A kind of excellent special steel bar controlled rolling and controlled cooling method |
| CN107876563A (en) * | 2017-10-31 | 2018-04-06 | 中冶华天南京电气工程技术有限公司 | A kind of system of the continuous casting and rolling based on Frequency Induction Heating |
| CN107983777A (en) * | 2017-12-08 | 2018-05-04 | 江苏永钢集团有限公司 | A kind of method for control speed being used in steel rolling process |
| CN108405618A (en) * | 2018-05-11 | 2018-08-17 | 中冶赛迪工程技术股份有限公司 | A kind of long material endless rolling connection method and its rolling line |
| CN108526221A (en) * | 2018-06-25 | 2018-09-14 | 中冶赛迪技术研究中心有限公司 | A kind of mild steel continuous casting and rolling production line and its production technology |
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| CN109513746A (en) * | 2018-12-05 | 2019-03-26 | 德龙钢铁有限公司 | A kind of hot-strip method and rough rolling device for small dimension continuous casting billet |
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| CN110052495A (en) * | 2019-04-24 | 2019-07-26 | 中冶赛迪工程技术股份有限公司 | A kind of long material endless rolling production line of short route and its milling method |
| CN110116135A (en) * | 2019-05-21 | 2019-08-13 | 东北大学 | A kind of Bar Wire Product product endless rolling production method |
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| CN111136106A (en) * | 2019-12-30 | 2020-05-12 | 钢铁研究总院 | Method for producing fine-grained steel by directly rolling continuous casting billet without passing through heating furnace |
| CN112122344A (en) * | 2020-09-09 | 2020-12-25 | 山西云时代太钢信息自动化技术有限公司 | System platform for hot charging of large-section casting blank through hot conveying |
| CN113560336A (en) * | 2021-07-26 | 2021-10-29 | 重庆钢铁研究所有限公司 | Preparation method of 17-4PH precipitation hardening stainless steel hexagonal steel profile |
| CN114669594A (en) * | 2022-04-19 | 2022-06-28 | 新兴铸管股份有限公司 | Automatic tracking system and tracking method for steel material information |
| CN114713631A (en) * | 2022-05-18 | 2022-07-08 | 首钢长治钢铁有限公司 | Rolling production system integration |
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