CN105855292A - Hot-rolling production method of asymmetrical abrasion-resistant steel composite blank - Google Patents
Hot-rolling production method of asymmetrical abrasion-resistant steel composite blank Download PDFInfo
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- CN105855292A CN105855292A CN201610197942.2A CN201610197942A CN105855292A CN 105855292 A CN105855292 A CN 105855292A CN 201610197942 A CN201610197942 A CN 201610197942A CN 105855292 A CN105855292 A CN 105855292A
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- Prior art keywords
- abrasion
- resistant stee
- rolling
- asymmetrical
- resistant steel
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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
- B21B1/38—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 sheets of limited length, e.g. folded sheets, superimposed sheets, pack rolling
-
- 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
- B21B45/02—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 lubricating, cooling, or cleaning
- B21B45/0203—Cooling
- B21B45/0209—Cooling devices, e.g. using gaseous coolants
- B21B45/0215—Cooling devices, e.g. using gaseous coolants using liquid coolants, e.g. for sections, for tubes
- B21B45/0218—Cooling devices, e.g. using gaseous coolants using liquid coolants, e.g. for sections, for tubes for strips, sheets, or plates
-
- 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
- B21B1/38—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 sheets of limited length, e.g. folded sheets, superimposed sheets, pack rolling
- B21B2001/386—Plates
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B2267/00—Roll parameters
- B21B2267/02—Roll dimensions
- B21B2267/06—Roll diameter
- B21B2267/065—Top and bottom roll have different diameters; Asymmetrical rolling
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B2275/00—Mill drive parameters
- B21B2275/02—Speed
- B21B2275/04—Roll speed
- B21B2275/05—Speed difference between top and bottom rolls
Abstract
The invention discloses a hot-rolling production method of an asymmetrical abrasion-resistant steel composite blank. The method comprises the following steps: putting the asymmetrical abrasion-resistant steel composite blank in a heating furnace in a manner of enabling the abrasion-resistant steel surface to face upwards; controlling the temperature of a preheating stage and the furnace staying time of the heating furnace in the step A and heating in an uniform heating stage conventionally after the preheating stage is ended; conventionally dephosphorizing the asymmetrical abrasion-resistant steel composite blank, then conveying the asymmetrical abrasion-resistant steel composite blank into a hot rolling machine for conventionally rolling to obtain a composite plate, wherein the diameter of an upper roller is smaller than that of a lower roller of a working roller, and the linear speed of the upper roller is greater than that of the lower roller; starting laminar cooling behind a part in a distance of 2-5cm away from the heat of a plate belt of the rolled composite plate, then conventionally rolling to obtain an asymmetrical abrasion-resistant steel composite roll. The hot-rolling production method of the asymmetrical abrasion-resistant steel composite blank is small in welding quantity; the overall efficiency is improved; the asymmetrical abrasion-resistant steel composite blank is stable to roll, low in damage rate, free of problems of bulges, serious warp and damaged heads and high in yield; the prepared asymmetrical abrasion-resistant steel composite roll is high in composite layer surface quality and low in equipment damage rate.
Description
Technical field
The present invention provides a kind of asymmetric abrasion-resistant stee composite billet hot rolling production method, belongs to metal-pressed machine technology neck
Territory.
Background technology
Asymmetric abrasion-resistant stee composite billet is that one block of abrasion-resistant stee and one block of ordinary steel are superimposed together and are welded surrounding
Connecing processing and form composite billet, abrasion-resistant stee is usually potassium steel or medium managese steel, or wear-resisting alloy steel or hard alloy steel, ordinary steel
For ordinary carbon steel or low-alloy steel.Asymmetric abrasion-resistant stee composite billet, after heating, rolling, obtains two kinds of raw material substrate metallurgical junction
It is combined and has the new composite of property.
Conventional abrasion-resistant stee composite billet is boxlike symmetry assembly, generally by four layers, six layers, the metal raw flitch groups such as eight layers
Become.As a example by the symmetrical expression abrasion-resistant stee composite billet being made up of four layers of metal raw flitch, these four layers of metal raw flitch are divided into two groups, and one
Zu Cheng basic unit raw material plate is made up of the steel plate that two blocks of ordinary carbon steel or low-alloy steel etc. are cheap, and one group claims cladding raw material plate
Being made up of two pieces of wear-resisting steel plates, four layers of metal raw flitch are symmetrical along composite billet thickness direction median plane, i.e. basic unit-cladding-
Cladding-basic unit, is not welded and fixed between basic unit's raw material plate and cladding raw material plate.
Symmetrical boxlike abrasion-resistant stee composite billet is symmetrical along composite billet thickness direction median plane due to its raw material plate composition and performance
Distribution, and is not welded and fixed between basic unit's raw material plate and cladding raw material plate, and the most this composite billet will not be because of when heating
Bending or bulge problem occur for base material is different from the linear expansion coefficient of plied timber, also will not be because of base when rolling
Layer is different from the resistance of deformation of cladding and causes elongation different, and then composite billet asking along its thickness direction severe bends occurs
Topic.
Due to asymmetric abrasion-resistant stee composite billet be superimposed together by the metal raw flitch that two pieces of compositions are different with performance after
It is asymmetric distribution that surrounding carries out again welding processing one-tenth, its composition of this composite billet and performance through-thickness median plane.
Although, asymmetric abrasion-resistant stee composite billet compared with symmetrical boxlike abrasion-resistant stee composite billet, have that production process is simple, welding capacity is few,
Lumber recovery is high, need not the plurality of advantages such as isolated material.But, asymmetric abrasion-resistant stee composite billet is when heating, owing to surrounding is
It is welded to connect, if using identical heating technique that abrasion-resistant stee side and ordinary steel side are heated, then abrasion-resistant stee and general
Will there is difference because the linear expansion coefficient of bi-material is different in the thermal expansion amount of logical steel, relatively large wear-resisting of thermal expansion amount
Steel by weld seam constraint can not free wxpansion, therefore bigger shear stress can be produced in welded joints, so it would appear that two kinds of phenomenons:
If the shearing strength that weld seam is under Current Temperatures is less than the shear stress suffered by weld seam, then weld seam will ftracture and make composite billet
Can not roll；If the shearing strength that weld seam is under Current Temperatures is more than the shear stress suffered by weld seam, then linear expansion coefficient
Bigger abrasion-resistant stee will because of can not free wxpansion and " bulge " phenomenon occurs, cause composite billet can not be smoothed out rolling.
Further, asymmetric abrasion-resistant stee composite billet is when rolling, if not carrying out special control, then wear-resisting steel layer
Elongation will be less than the elongation of ordinary steel because its resistance of deformation is big, this will make composite billet occur sternly to abrasion-resistant stee face
Heavily bend, the composite billet of severe bends can be difficult to nip roll, also be difficult to by rolling line, ultimately result in roll and the most even damage
Rolling equipment.Asymmetric abrasion-resistant stee composite billet hot rolling obtains the abrasion-resistant stee composite plate of the condition of high temperature after completing, at this moment need height
Temperature composite plate is sent into coiling machine after carrying out section cooling and is coiled into Combined roll, and the composite plate of the condition of high temperature is in quick cooling procedure
In, the wear-resisting steel layer amount of contraction bigger due to linear expansion coefficient is relatively big, composite plate head can be made to produce to abrasion-resistant stee face the most curved
Song, the head of bending can not pass through laminar flow track can not penetrate coiling machine smoothly, will eventually cause because of heap steel
Batch unsuccessfully.
So being necessary to do particular determination in the hot rolling production method of asymmetric abrasion-resistant stee composite billet, to overcome above-mentioned asking
Topic.
Summary of the invention
For solving the problems such as asymmetric abrasion-resistant stee composite billet weld cracking in heating process, bulge, and in rolling
Bending in cooling procedure is i.e. stuck up, is detained first order issue, and the present invention provides a kind of asymmetric abrasion-resistant stee composite billet hot rolling production method,
Effectively to solve the problems referred to above.
The present invention is realized by following technical proposal: a kind of asymmetric abrasion-resistant stee composite billet hot rolling production method, under passing through
Arrange each step:
A, abrasion-resistant stee surface-coated is had high-temp antioxidizing, anti-decarburizing coating asymmetric abrasion-resistant stee composite billet send into heating furnace
In, and making abrasion-resistant stee face up, this is owing to heating furnace internal upper part temperature is higher than temperature of lower, is therefore filled by abrasion-resistant stee composite billet
When entering in stove, the ordinary steel one that abrasion-resistant stee one surface temperature that in abrasion-resistant stee composite billet, resistance of deformation is big is little higher than resistance of deformation can be made
Face；
B, the preheating section temperature of rate-determining steps A heating furnace are 600～800 DEG C, and make asymmetric abrasion-resistant stee composite billet at preheating section
Time in stove be 60～90min, this is due to relatively low preheating section temperature, and asymmetric abrasion-resistant stee composite billet can be made slowly to rise
Temperature, is greatly reduced the thermal stress in weld seam and composite billet, it is to avoid weld cracking and composite billet bulge；
C, step B asymmetric abrasion-resistant stee composite billet preheating section heating terminate after, carry out routinely bringing-up section, soaking zone heating
After, come out of the stove at tapping temperature is 1200 DEG C ~ 1250 DEG C；
D, step C come out of the stove after asymmetric abrasion-resistant stee composite billet after conventional dephosphorization, send into hot-rolling mill and carry out pair rolling, described
The upper roller diameter of hot-rolling mill working roll be less than lower roller diameter 10～20mm, and the linear velocity of upper roller more than lower roll linear velocity 1～
6%, and control start rolling temperature be 1100 DEG C ~ 1200 DEG C, finishing temperature be 850 ~ 930 DEG C, obtain abrasion-resistant stee composite plate；
E, step D is rolled after abrasion-resistant stee composite plate after strip head 1～5m, proceed by conventional section cooling, afterwards
At coiling temperature is 680 ~ 730 DEG C, carries out routine and batch, obtain asymmetric abrasion-resistant stee Combined roll.Before strip head, 1～5m is not
Carry out section cooling, the rate of temperature fall of strip head can be made to be greatly reduced, thus because thermal shrinking quantity is different, head will not occur
The phenomenon of portion's severe bends.
The high-temp antioxidizing of described step A, anti-decarburizing coating are commercial conventional coating, thickness of its coating is 0.2 ~
1.0mm。
The soaking zone temperature of described step C is 1200 DEG C ~ 1250 DEG C.
During conventional hot rolling, either homogeneous material metal base or symmetrical expression abrasion-resistant stee composite billet, the upper roller of its working roll
Footpath is the most identical with lower roll.The upper roller diameter of the working roll of hot-rolling mill used by the present invention why be less than lower roller diameter 10～
20mm, is because: for asymmetric abrasion-resistant stee composite billet, because abrasion-resistant stee face is in upper (step A), it is desirable to the purpose that upper roller is little
It is to make the unit average pressure in abrasion-resistant stee face more than ordinary steel face.Abrasion-resistant stee resistance of deformation is big, and ordinary steel resistance of deformation is little,
But the unit average pressure suffered by abrasion-resistant stee is big compared with ordinary steel, thus can solve abrasion-resistant stee extension in the operation of rolling
The problem little compared with ordinary steel.Further, in the case of other condition is identical, roller footpath is the least, and deformed area area is the least, and rolls
Power processed is the most equal (balance between two forces), so unit average pressure the biggest (can be understood as pressure), metal deformation resistance
The biggest, the average unit pressure needed for deformation is the biggest.The abrasion-resistant stee big to resistance of deformation applies bigger unit in deformation
Average pressure, applies less unit average pressure in deformation to the ordinary steel that resistance of deformation is little, the most just can make two kinds of gold
Belong to the elongation difference in the operation of rolling to reduce, the problem being just avoided that severe bends.
During conventional hot rolling, either homogeneous material metal base or symmetrical expression abrasion-resistant stee composite billet, the upper roller line of working roll
Speed is the most identical with lower roll linear velocity, because homogeneous material metal base material is homogeneous, extends also under identical roll linear velocity
Identical, metal base can be straight after rolling；Symmetrical expression abrasion-resistant stee composite billet in fact there is also two kinds of metals in rolling and prolongs
Stretch different problems, but be not welded and fixed between this composite billet cladding and basic unit, so bi-material can freely prolong
Stretching, the difference of elongation can't cause metal base to bend.But for the asymmetric abrasion-resistant stee composite billet of the present invention, it is necessary to
Control the upper roller linear velocity of working roll in hot-rolling mill and be more than the 1～6% of lower roll linear velocity, this is because: asymmetric abrasion-resistant stee is combined
The upper and lower layer material of base is different, and upper strata abrasion-resistant stee resistance of deformation is big, and lower floor's ordinary steel resistance of deformation is little, then will make roller
Linear velocity is more than lower roll linear velocity, straight after the most just making composite billet rolling, the problem solving severe bends.Further,
The big ordinary steel that abrasion-resistant stee rolls under higher roll linear velocity, resistance of deformation is little of resistance of deformation is under relatively low linear velocity
Rolling, just can make two kinds of metal elongation differences reduce, the problem solving severe bends.
Pair rolling is typically to begin to cooling from head, and some also can reserve one section of head and not cool down, but its
It is diverse that mechanism does not carry out section cooling with the head of application claims.The head of pair rolling can make after cooling down
The intensity of metal is greatly increased, if thickness will be difficult to batch more greatly after head enters coiling machine, so some conventional gold
Genus plate rolling (when particularly metal strength is higher or when rolling target thickness is bigger) also can reserve one section of head and not carry out layer
Stream cooling.The present invention is just to carry out section cooling after the strip head of composite plate reserves 1～5m, this is because: for non-
Symmetrical abrasion-resistant stee composite billet, in the operation of rolling, abrasion-resistant stee at high temperature realizes metallurgical binding and is integrally forming with ordinary steel, laminar flow
During cooling, temperature drop is very big, and abrasion-resistant stee is the most different from the linear expansion coefficient of ordinary steel, and so, the wear-resisting steel layer of composite plate is received
Contracting amount is the biggest, and strip steel head will be made to bend to abrasion-resistant stee face, and temperature drop degree the biggest, bending is the biggest.It addition, line is swollen
The material that swollen coefficient is big, under identical temperature drop, amount of contraction is the biggest；The line swell increment of material or amount of contraction become with temperature
Chemical conversion direct ratio, therefore, head will make change in temperature Δ t become big if carried out section cooling, and amount of bow also just becomes big, and head is just
Meeting severe bends, cannot pass through rolling line and maybe can not enter coiling machine.
The present invention possesses following advantages and effect: compared with producing with the assembly of symmetrical expression abrasion-resistant stee composite billet, the present invention
The welding capacity of the asymmetric abrasion-resistant stee composite billet provided is greatly reduced, although rolling efficiency and symmetrical expression abrasion-resistant stee composite billet phase
With, but after having rolled due to symmetrical expression abrasion-resistant stee composite billet, need to give special bundling production line to carry out trimming, cause bundling
Produce lumber recovery and be only about 85%.And after the asymmetric abrasion-resistant stee composite billet of the present invention has rolled, it is not necessary to bundling, only need to be
After common finishing line carries out minimal amount of trimming, i.e. can obtain being laminated abrasion-resistant stee composite plate finished product, whole efficiency carries significantly
High.The asymmetric abrasion-resistant stee composite billet milling method provided according to the present invention, its rolling is stable, and useless loss rate is low, do not exist bulge,
Severe bends i.e. sticks up, detains first order issue, and the trimming amount after the rolling of asymmetric abrasion-resistant stee composite billet is only symmetrical expression abrasion-resistant stee and is combined
The 1/4 of base trimming amount, lumber recovery is greatly improved.The surface of gained of the present invention asymmetric abrasion-resistant stee Combined roll isolates material without application
Material, therefore avoid the bonding phenomenon of the plied timber up and down caused because of isolated material skewness and isolated material press-in cladding
Surface makes the problem that surface quality is the best, during the rolling of the most asymmetric abrasion-resistant stee composite billet, clad surface directly and roll contact,
Substantially increasing clad surface quality, equipment will not be brought extra abrasion by the milling method of the present invention.
Detailed description of the invention
Below in conjunction with example, the present invention is described further.
Embodiment 1
Rolling the asymmetric abrasion-resistant stee composite billet of a size of 7000mm*1200mm*150mm, this composite billet is wear-resisting by one piece of 65Mn
Steel alloy and one piece of Q235 straight carbon steel composition；Wherein, 65Mn wear-resisting alloy steel a size of 7000mm*1200mm*82mm, Q235 is general
Carbon steel a size of 7000mm*1200mm*68mm, rolling target thickness is 4.5mm.
A, 65Mn surface-coated is had high-temp antioxidizing, anti-decarburizing coating (its paint thickness is 0.2mm) asymmetric resistance to
Mill steel composite billet is sent in heating furnace, makes 65Mn wear-resisting alloy steel face up；
B, the preheating section temperature of rate-determining steps A heating furnace are 620 ± 20 DEG C, and make asymmetric abrasion-resistant stee composite billet at preheating section
Time in stove is 90min；
C, step B asymmetric abrasion-resistant stee composite billet after preheating section heating terminates, carry out bringing-up section routinely, soaking zone adds
Heat, comes out of the stove afterwards at tapping temperature is 1200 DEG C；Described soaking zone temperature is 1200 DEG C；
D, step C is heated after asymmetric abrasion-resistant stee composite billet after conventional dephosphorization, send into hot-rolling mill and carry out pair rolling, institute
The upper roller diameter stating hot-rolling mill working roll is 780mm, a diameter of 795mm of lower roll, the pressure of each rolling pass in the operation of rolling
Amount distribution, reduction ratio, upper working rolls and lower working rolls speed difference are as shown in table 1；And control start rolling temperature be 1200 DEG C, finishing temperature be 900
+/-20 DEG C, obtains abrasion-resistant stee composite plate；
E, step D is rolled after composite plate after strip head 4m, proceed by conventional section cooling, then batching temperature
Degree batches for carrying out routine at 700+/-20 DEG C, obtains asymmetric abrasion-resistant stee Combined roll.
Embodiment 2
Rolling the asymmetric wear-resisting composite billet of a size of 8000mm*1600mm*180mm, this composite billet is by one piece of resistance to break-in of 45Mn2
Jin Gang and one piece of Q345 low-alloy steel composition；Wherein, 45Mn2 wear-resisting alloy steel a size of 8000mm*1600mm*120mm, Q345
Low-alloy steel a size of 8000mm*1600mm*60mm, rolling target thickness is 6.0mm.
A, 45Mn2 wear-resisting alloy steel surface-coated is had high-temp antioxidizing, anti-decarburizing coating (its paint thickness is 1mm)
Asymmetric abrasion-resistant stee composite billet is sent in heating furnace, makes 45Mn2 wear-resisting alloy steel face up；
B, the preheating section temperature of rate-determining steps A heating furnace are 680 ± 20 DEG C, and make asymmetric abrasion-resistant stee composite billet at preheating section
Time in stove is 60min；
C, step B asymmetric abrasion-resistant stee composite billet after preheating section heating terminates, carry out bringing-up section routinely, soaking zone adds
Heat, comes out of the stove afterwards at tapping temperature is 1250 DEG C；Described soaking zone temperature is 1250 DEG C；
D, step C is heated after asymmetric abrasion-resistant stee composite billet after conventional dephosphorization, send into hot-rolling mill and carry out pair rolling, institute
The upper roller diameter stating hot-rolling mill working roll is 780mm, a diameter of 790mm of lower roll, the pressure of each rolling pass in the operation of rolling
Amount distribution, reduction ratio, upper working rolls and lower working rolls speed difference are as shown in table 2；And control start rolling temperature be 1100 DEG C, finishing temperature be 900
+/-20 DEG C, obtains abrasion-resistant stee composite plate；
E, step D is rolled after composite plate after strip head 3m, proceed by conventional section cooling, then batching temperature
Degree batches for carrying out routine at 710+/-20 DEG C, obtains asymmetric abrasion-resistant stee Combined roll.
Claims (3)
1. an asymmetric abrasion-resistant stee composite billet hot rolling production method, it is characterised in that through following each step:
A, abrasion-resistant stee surface-coated is had high-temp antioxidizing, anti-decarburizing coating asymmetric abrasion-resistant stee composite billet send into heating furnace
In, and make abrasion-resistant stee face up；
B, the preheating section temperature of rate-determining steps A heating furnace are 600～800 DEG C, and make asymmetric abrasion-resistant stee composite billet at preheating section
Time in stove be 60～90min；
C, step B asymmetric abrasion-resistant stee composite billet preheating section heating terminate after, carry out routinely bringing-up section, soaking zone heating
After, come out of the stove at tapping temperature is 1200 DEG C ~ 1250 DEG C；
D, step C come out of the stove after asymmetric abrasion-resistant stee composite billet after conventional dephosphorization, send into hot-rolling mill and carry out pair rolling, described
The upper roller diameter of hot-rolling mill working roll be less than lower roller diameter 10～20mm, and the linear velocity of upper roller more than lower roll linear velocity 1～
6%, and control start rolling temperature be 1100 DEG C ~ 1200 DEG C, finishing temperature be 850 ~ 930 DEG C, obtain abrasion-resistant stee composite plate；
E, step D is rolled after abrasion-resistant stee composite plate after strip head 1～5m, proceed by conventional section cooling, afterwards
At coiling temperature is 680 ~ 730 DEG C, carries out routine and batch, obtain asymmetric abrasion-resistant stee Combined roll.
Asymmetric abrasion-resistant stee composite billet hot rolling production method the most according to claim 1, it is characterised in that: described step A
High-temp antioxidizing, anti-decarburizing coating be commercial conventional coating, its coating thickness be 0.2 ~ 1.0mm.
Asymmetric abrasion-resistant stee composite billet hot rolling production method the most according to claim 1, it is characterised in that: described step C
Soaking zone temperature be 1200 DEG C ~ 1250 DEG C.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610197942.2A CN105855292B (en) | 2016-03-31 | 2016-03-31 | A kind of method that wear-resisting steel composite board volume is produced with asymmetric abrasion-resistant stee composite billet hot rolling |
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| CN201610197942.2A CN105855292B (en) | 2016-03-31 | 2016-03-31 | A kind of method that wear-resisting steel composite board volume is produced with asymmetric abrasion-resistant stee composite billet hot rolling |
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| CN105855292A true CN105855292A (en) | 2016-08-17 |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN111085547A (en) * | 2019-12-25 | 2020-05-01 | 山东钢铁集团日照有限公司 | Manufacturing method of asymmetric dissimilar material hot-rolled composite coil |
| CN115255692A (en) * | 2022-08-03 | 2022-11-01 | 新疆八一钢铁股份有限公司 | Low-carbon high-Cr alloy billet connecting and rolling method |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111085547A (en) * | 2019-12-25 | 2020-05-01 | 山东钢铁集团日照有限公司 | Manufacturing method of asymmetric dissimilar material hot-rolled composite coil |
| CN115255692A (en) * | 2022-08-03 | 2022-11-01 | 新疆八一钢铁股份有限公司 | Low-carbon high-Cr alloy billet connecting and rolling method |
| CN115255692B (en) * | 2022-08-03 | 2024-03-22 | 新疆八一钢铁股份有限公司 | Low-carbon high-Cr alloy billet connection and rolling method |
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