CN105964704A - Copper-containing steel continuous casting slab heating method and hot rolling process heating furnace - Google Patents
Copper-containing steel continuous casting slab heating method and hot rolling process heating furnace Download PDFInfo
- Publication number
- CN105964704A CN105964704A CN201610294139.0A CN201610294139A CN105964704A CN 105964704 A CN105964704 A CN 105964704A CN 201610294139 A CN201610294139 A CN 201610294139A CN 105964704 A CN105964704 A CN 105964704A
- Authority
- CN
- China
- Prior art keywords
- copper
- temperature
- hot
- heating furnace
- rich phase
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 239000010949 copper Substances 0.000 title claims abstract description 154
- 229910052802 copper Inorganic materials 0.000 title claims abstract description 150
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 title claims abstract description 141
- 229910000831 Steel Inorganic materials 0.000 title claims abstract description 99
- 239000010959 steel Substances 0.000 title claims abstract description 99
- 238000010438 heat treatment Methods 0.000 title claims abstract description 69
- 238000000034 method Methods 0.000 title claims abstract description 40
- 238000009749 continuous casting Methods 0.000 title claims abstract description 36
- 238000005098 hot rolling Methods 0.000 title claims abstract description 11
- 230000007547 defect Effects 0.000 claims abstract description 31
- 230000008569 process Effects 0.000 claims abstract description 19
- 239000000203 mixture Substances 0.000 claims description 9
- 229910052759 nickel Inorganic materials 0.000 claims description 9
- 238000005096 rolling process Methods 0.000 claims description 9
- 229910002482 Cu–Ni Inorganic materials 0.000 claims description 6
- 229910052748 manganese Inorganic materials 0.000 claims description 6
- 229910052804 chromium Inorganic materials 0.000 claims description 3
- 238000001816 cooling Methods 0.000 claims description 3
- 230000000694 effects Effects 0.000 abstract description 5
- 238000004519 manufacturing process Methods 0.000 abstract description 4
- 238000001514 detection method Methods 0.000 abstract 1
- 239000012071 phase Substances 0.000 description 41
- 239000010410 layer Substances 0.000 description 26
- 238000009792 diffusion process Methods 0.000 description 8
- 239000007791 liquid phase Substances 0.000 description 7
- 238000005516 engineering process Methods 0.000 description 5
- 239000011159 matrix material Substances 0.000 description 5
- 230000004899 motility Effects 0.000 description 5
- 239000007788 liquid Substances 0.000 description 4
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 3
- 230000008859 change Effects 0.000 description 3
- 238000010304 firing Methods 0.000 description 3
- 238000007689 inspection Methods 0.000 description 3
- 230000004048 modification Effects 0.000 description 3
- 238000012986 modification Methods 0.000 description 3
- 208000037656 Respiratory Sounds Diseases 0.000 description 2
- 238000003723 Smelting Methods 0.000 description 1
- 230000008901 benefit Effects 0.000 description 1
- 239000013078 crystal Substances 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- PXHVJJICTQNCMI-UHFFFAOYSA-N nickel Substances [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 description 1
- 229910052758 niobium Inorganic materials 0.000 description 1
- 230000003647 oxidation Effects 0.000 description 1
- 238000007254 oxidation reaction Methods 0.000 description 1
- 230000000149 penetrating effect Effects 0.000 description 1
- 230000033764 rhythmic process Effects 0.000 description 1
- 239000007790 solid phase Substances 0.000 description 1
- 239000002344 surface layer Substances 0.000 description 1
Classifications
-
- 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
- B21B37/74—Temperature control, e.g. by cooling or heating the rolls or the product
-
- 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
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/02—Ferrous alloys, e.g. steel alloys containing silicon
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/04—Ferrous alloys, e.g. steel alloys containing manganese
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/08—Ferrous alloys, e.g. steel alloys containing nickel
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/16—Ferrous alloys, e.g. steel alloys containing copper
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F27—FURNACES; KILNS; OVENS; RETORTS
- F27D—DETAILS OR ACCESSORIES OF FURNACES, KILNS, OVENS, OR RETORTS, IN SO FAR AS THEY ARE OF KINDS OCCURRING IN MORE THAN ONE KIND OF FURNACE
- F27D19/00—Arrangements of controlling devices
-
- 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
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F27—FURNACES; KILNS; OVENS; RETORTS
- F27D—DETAILS OR ACCESSORIES OF FURNACES, KILNS, OVENS, OR RETORTS, IN SO FAR AS THEY ARE OF KINDS OCCURRING IN MORE THAN ONE KIND OF FURNACE
- F27D19/00—Arrangements of controlling devices
- F27D2019/0003—Monitoring the temperature or a characteristic of the charge and using it as a controlling value
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- General Engineering & Computer Science (AREA)
- Heat Treatment Of Steel (AREA)
- Metal Rolling (AREA)
Abstract
The invention discloses a method for heating a copper-containing steel continuous casting slab and a heating furnace in a hot rolling process, wherein the method comprises the following steps: the copper-containing steel continuous casting slab enters a heating furnace in a hot rolling procedure, and is heated at a first temperature for a first time period to obtain a hot slab with a copper-rich phase layer thickness smaller than a first threshold value or without the copper-rich phase layer; wherein the first temperature is not higher than the lowest temperature for generating the copper-rich phase, or the first temperature is not lower than 1280 ℃; and after the hot blank is subjected to a post-treatment process, obtaining the hot-rolled steel coil with the detection rate of the copper brittleness surface defects being less than a second threshold value. The heating method and the heating furnace provided by the invention are used for solving the technical problems that the requirement on hot rolling equipment is too high or the operation difficulty is high and a production line is difficult to apply in the prior art. The technical effects of lightening or eliminating the copper-rich phase layer and increasing the flexibility of the production line operation are achieved.
Description
Technical field
The present invention relates to smelting iron and steel technical field, particularly relate to a kind of copper bearing steel continuous casting steel billet heating means and
Hot-rolled process heating furnace.
Background technology
Easily there is " copper brittleness " surface defect in the operation of rolling in cupric steel billet.The main cause of " copper brittleness " be by
In: slab, in heating process, produces liquid phase copper after surface layer oxidation, and liquid phase copper is at slab matrix table
Enrichment near face, and gradually penetrating in steel slab surface, is formed and is positioned at slab 101 and ferrum oxide shown in Fig. 1
Copper-rich phase layer 103 between skin 102, and copper-rich phase layer 103 is high due to copper content, easily at crystal boundary
Assembling, form surface micro crackle, surface micro crackle forms surface in the operation of rolling due to roll-force effect
" copper brittleness " defect of oval pit shape, the length and width of " copper brittleness " defect is generally grade, the degree of depth
Generally 10 micron orders.
In order to suppress copper brittleness defect, it is considered that by heating furnace heating and temperature control copper fusing point 1083 DEG C with
Under, the generation reducing liquid phase copper can reduce copper brittleness defect.
But, when reality is applied, owing to heating-up temperature is relatively low, equipment of hot rolling or rhythm of production are required very
Height, the general line that produces is difficult to apply.
It is to say, by control heating-up temperature at the fusing point less than 1083 DEG C of copper in prior art, suppress
Copper brittleness defect, exists too high to equipment of hot rolling requirement or operation easier big, produce the technical problem that line is difficult to apply.
Summary of the invention
The present invention, by providing a kind of copper bearing steel continuous casting steel billet heating means and hot-rolled process heating furnace, solves
Requiring too high to equipment of hot rolling present in prior art or operation easier big, the technology that product line is difficult to apply is asked
Topic.
On the one hand, for solving above-mentioned technical problem, the technical scheme is that
A kind of copper bearing steel continuous casting steel billet heating means, including:
Described copper bearing steel continuous casting steel billet enters in hot-rolled process heating furnace, heats the very first time at the first temperature
Section, it is thus achieved that copper-rich phase layer thickness is less than first threshold or the hot base without copper-rich phase layer；Wherein, described first
Temperature generates minimum temperature less than or equal to copper-rich phase, or described first temperature is more than or equal to 1280 DEG C；
After the described post-treated operation of hot base, it is thus achieved that copper brittleness surface defect recall rate is less than the hot rolling of Second Threshold
Coil of strip.
Optionally, after the described post-treated operation of hot base, it is thus achieved that copper brittleness surface defect recall rate is less than the second threshold
The coils of hot-rolled steel of value, particularly as follows: after described hot base goes out described heating furnace, successively through de-scaling, roughing, finish rolling,
After cooling, curling, it is thus achieved that copper brittleness surface defect recall rate is less than the described coils of hot-rolled steel of Second Threshold.
Optionally, the composition of described copper bearing steel continuous casting steel billet and the percentage by weight of described composition are: C≤
0.20%, Si≤0.60%, Mn≤2.0%, P≤0.15%, S≤0.01%, Cr≤1.0%, Cu:0.2～1.0%,
Ni≤0.2%.
Optionally, the width of described copper bearing steel continuous casting steel billet is 800mm～2150mm.
Optionally, described first time period is more than or equal to 20min.
Optionally, described copper-rich phase generation minimum temperature determines according to the solidus of Cu-Ni phasor.
Optionally, described copper-rich phase layer is the thickness≤3mm of described copper bearing steel slab surface, Cu content
The base layer of ＞ 0.6%.
Optionally, described hot base is after described heating furnace heats, and the temperature copper bearing steel higher than 1000 DEG C is even
Cast panel base.
Optionally, described first temperature determines according to the device parameter of described heating furnace；Described device parameter bag
Include mill speed.
On the other hand, it is provided that a kind of hot-rolled process heating furnace, including:
Heating furnace body；
Temperature control unit, is the first temperature for controlling the heating-up temperature of described heating furnace body, to contain
After copper steel continuous casting steel billet enters described heating furnace, heating first time period obtains copper-rich phase layer at the first temperature
Thickness is less than first threshold or the hot base without copper-rich phase layer；Wherein, described first temperature is less than or equal to copper-rich
Generate minimum temperature mutually, or described first temperature is more than or equal to 1280 DEG C；So that the described post-treated work of hot base
After sequence, it is thus achieved that copper brittleness surface defect recall rate is less than the coils of hot-rolled steel of Second Threshold.
The one or more technical schemes provided in the embodiment of the present application, at least have the following technical effect that or excellent
Point:
The method of the embodiment of the present application offer and heating furnace, on the one hand, as long as owing to heating-up temperature is in solidus
Below temperature, just will not produce liquid copper-rich phase, and in the copper bearing steel continuous casting steel billet adding Ni, copper-rich phase
Generate minimum temperature higher than the fusing point 1083 DEG C of copper, therefore heating-up temperature is set less than or equal to copper-rich interpromoting relation in five elements
Become minimum temperature, be possible not only to stop generating copper-rich phase layer, also require to reduce to firing equipment, be conducive to increasing
Add the motility producing line operation.On the other hand, it it is 1200 DEG C during copper diffusion coefficient in steel 1300 DEG C
Time 2 times, after temperature raises, the liquid phase of copper rapidly to the matrix internal diffusion of steel, and then can alleviate or disappear
Except copper-rich phase layer；Therefore when heating-up temperature >=1280 DEG C, " copper brittleness " defect substantially eliminates.
Accompanying drawing explanation
For the technical scheme being illustrated more clearly that in the embodiment of the present invention, institute in embodiment being described below
The accompanying drawing used is needed to be briefly described, it should be apparent that, the accompanying drawing in describing below is only the present invention
Embodiment, for those of ordinary skill in the art, on the premise of not paying creative work, also
Other accompanying drawing can be obtained according to the accompanying drawing provided.
Fig. 1 is the schematic diagram of copper-rich phase layer in the embodiment of the present application；
Fig. 2 is the flow chart of copper bearing steel continuous casting steel billet heating means in the embodiment of the present application；
Fig. 3 is the Cu-Ni phasor in the embodiment of the present application；
Fig. 4 is the structural representation of heating furnace in the embodiment of the present application.
Detailed description of the invention
The embodiment of the present application by providing a kind of copper bearing steel continuous casting steel billet heating means and hot-rolled process heating furnace,
Solve too high to equipment of hot rolling requirement present in prior art or operation easier big, produce what line was difficult to apply
Technical problem.Achieve and copper-rich phase layer has been mitigated or eliminated, and add the technology of the motility producing line operation
Effect.
For solving above-mentioned technical problem, the general thought of the embodiment of the present application offer technical scheme is as follows:
The application provides a kind of copper bearing steel continuous casting steel billet heating means, including:
Described copper bearing steel continuous casting steel billet enters in hot-rolled process heating furnace, heats the very first time at the first temperature
Section, it is thus achieved that copper-rich phase layer thickness is less than first threshold or the hot base without copper-rich phase layer；Wherein, described first
Temperature generates minimum temperature less than or equal to copper-rich phase, or described first temperature is more than or equal to 1280 DEG C；
After the described post-treated operation of hot base, it is thus achieved that copper brittleness surface defect recall rate is less than the hot rolling of Second Threshold
Coil of strip.
The method of the embodiment of the present application offer and heating furnace, on the one hand, as long as owing to heating-up temperature is in solidus
Below temperature, just will not produce liquid copper-rich phase, and in the copper bearing steel continuous casting steel billet adding Ni, copper-rich phase
Generate minimum temperature higher than the fusing point 1083 DEG C of copper, therefore heating-up temperature is set less than or equal to copper-rich interpromoting relation in five elements
Become minimum temperature, be possible not only to stop generating copper-rich phase layer, also require to reduce to firing equipment, be conducive to increasing
Add the motility producing line operation.On the other hand, it it is 1200 DEG C during copper diffusion coefficient in steel 1300 DEG C
Time 2 times, after temperature raises, the liquid phase of copper rapidly to the matrix internal diffusion of steel, and then can alleviate or disappear
Except copper-rich phase layer；Therefore when heating-up temperature >=1280 DEG C, " copper brittleness " defect substantially eliminates.
In order to be better understood from technique scheme, below in conjunction with specific embodiment to above-mentioned technical side
Case is described in detail, it should be understood that the specific features in the embodiment of the present invention and embodiment is to the application
The detailed description of technical scheme rather than the restriction to technical scheme, in the case of not conflicting,
Technical characteristic in the embodiment of the present application and embodiment can be mutually combined.
Embodiment one
In the present embodiment, it is provided that a kind of copper bearing steel continuous casting steel billet heating means, refer to Fig. 2, Fig. 2
For the flow chart of copper bearing steel continuous casting steel billet heating means in the embodiment of the present application, as in figure 2 it is shown, described method
Including:
Step S101, described copper bearing steel continuous casting steel billet enters in hot-rolled process heating furnace, adds at the first temperature
Hot first time period, it is thus achieved that copper-rich phase layer thickness is less than first threshold or the hot base without copper-rich phase layer；Wherein,
Described first temperature generates minimum temperature less than or equal to copper-rich phase, or described first temperature is more than or equal to
1280℃；
Step S102, after the described post-treated operation of hot base, it is thus achieved that copper brittleness surface defect recall rate is less than second
The coils of hot-rolled steel of threshold value.
Below described copper bearing steel continuous casting steel billet heating means are described in detail:
Specifically, described " copper brittleness " defect is copper bearing steel slab surface micro-cracks shape after rolling
Become the small-sized defect of grade of surface pit shape.The Method And Principle that the application provides is: due to heating-up temperature
As long as below solidus temperature, liquid copper-rich phase just will not be produced.Therefore, when first containing Ni in slab
During element, copper-rich phase can be calculated generate lowest temperature according to the proportioning of Cu, Ni element and the solidus of phasor
Degree.Such as: as Cu:Ni=6:1, this temperature is about 1100 DEG C, the fusing point of relative copper 1083 DEG C
Higher, be conducive to increasing the motility producing line operation, reduce and produce line operation easier.It addition, copper
It is 2 times when 1200 DEG C during the diffusion coefficient in steel 1300 DEG C, after temperature raises, the liquid phase energy of copper
Rapidly to the matrix internal diffusion of steel, and then copper-rich phase layer is mitigated or eliminated；In conjunction with production leadtime data,
Therefore arrange when heating-up temperature >=1280 DEG C, " copper brittleness " defect substantially eliminates.
Therefore control described first temperature and generate minimum temperature less than or equal to copper-rich phase, or described first temperature is more than
Equal to 1280 DEG C, the copper-rich phase layer thickness of the described hot base obtained can be reduced, and then reduce the described heat obtained
The copper brittleness surface defect recall rate of rolled steel coils.
In the embodiment of the present application, described Second Threshold can be 1%, it is also possible to is 0.5%, does not makees at this
Limit.
In specific implementation process, described heating-up temperature is to control in heating furnace before continuous casting steel billet goes out heating furnace
Temperature.
In specific implementation process, after the described post-treated operation of hot base, it is thus achieved that copper brittleness surface defect recall rate
Less than the coils of hot-rolled steel of Second Threshold, particularly as follows:
After described hot base goes out described heating furnace, successively after de-scaling, roughing, finish rolling, cooling down, crimp, obtain
Obtain the copper brittleness surface defect recall rate described coils of hot-rolled steel less than Second Threshold.
In the embodiment of the present application, the composition of described copper bearing steel continuous casting steel billet and the percentage by weight of described composition
Can be:
C≤0.20%, Si≤0.60%, Mn≤2.0%, P≤0.15%, S≤0.01%, Cr≤1.0%,
Cu:0.2～1.0%, Ni≤0.2%.
In the embodiment of the present application, the width of described copper bearing steel continuous casting steel billet is 800mm～2150mm.
In the embodiment of the present application, described first time period is more than or equal to 20min.
In the embodiment of the present application, described copper-rich phase layer is the thickness of described copper bearing steel slab surface
The base layer of≤3mm, Cu content ＞ 0.6%.
In the embodiment of the present application, described hot base is after described heating furnace heats, and temperature is higher than 1000 DEG C
Copper bearing steel continuous casting steel billet.
In specific implementation process, described copper-rich phase generates minimum temperature can be according to the solid phase of Cu-Ni phasor
Line determines.
Specifically, refer to Fig. 3, Fig. 3 is Cu-Ni phasor, and transverse axis is the content of Cu and Ni, vertical
Axle is temperature.According to the content of Cu and Ni, copper-rich phase can be read on Cu-Ni phasor and generate lowest temperature
Degree.
In the embodiment of the present application, described first temperature determines according to the device parameter of described heating furnace；Described
Device parameter includes mill speed.
Specifically, can be mill speed when being faster than certain value, select described first temperature less than or equal to copper-rich
Generate minimum temperature mutually；When mill speed is slower than certain value, select described first temperature more than or equal to 1280 DEG C.
Specifically, this, relative to the existing technology preventing " copper brittleness ", generates lowest temperature less than or equal to copper-rich phase
Degree, more wide in range than≤1083 DEG C of scopes, and the application provide two temperature ranges all need not strictly control
Heat time heating time processed, length, and need not accelerate programming rate and reducing atmosphere controls, and produced line operation simpler
Just flexible, " copper brittleness " defect is greatly lowered.
The present invention will be described to provide below three instantiations:
1, as a example by continuous casting steel billet 132C073381031, steel grade SPA-H, composition C:0.09%, Si:
0.32%, Mn:0.47%, P:0.085%, S:0.006%, Alt:0.035%, Cu:0.27%, Ni:
0.05%.
This slab is sent into hot-rolled process heating furnace, controls its heating-up temperature 1066 DEG C, be heated into hot base, go out
After heating furnace through de-scaling, roughing, finish rolling, cool down, crimp after obtain coils of hot-rolled steel.Coil of strip is checked through table inspection
Surface does not has defect.
2, as a example by continuous casting steel billet 132B066093081, steel grade SPA-H, composition C:0.10%, Si:
0.36%, Mn:0.43%, P:0.091%, S:0.003%, Alt:0.030%, Cu:0.28%, Ni:
0.04%.
This slab is sent into hot-rolled process heating furnace, controls its heating-up temperature 1298 DEG C, be heated into hot base, go out
After heating furnace through de-scaling, roughing, finish rolling, cool down, crimp after obtain coils of hot-rolled steel.Coil of strip is checked through table inspection
Surface does not has defect.
3, as a example by continuous casting steel billet 141C020532051, steel grade SQ700J, composition C:0.07%, Si:
0.24%, Mn:1.33%, P:0.015%, S:0.002%, Alt:0.030%, Nb:0.08%, Cu:
0.23%, Ni:0.11%.
This slab is sent into hot-rolled process heating furnace, controls its heating-up temperature 1283 DEG C, be heated into hot base, go out
After heating furnace through de-scaling, roughing, finish rolling, cool down, crimp after obtain coils of hot-rolled steel.Coil of strip is checked through table inspection
Surface does not has defect.
Based on same inventive concept, present invention also provides the device that in embodiment one, method is corresponding, refer to reality
Execute example two.
Embodiment two
In the present embodiment, it is provided that a kind of hot-rolled process heating furnace, as shown in Figure 4, described heating furnace bag
Include:
Heating furnace body 401；
Temperature control unit 402, is the first temperature for controlling the heating-up temperature of described heating furnace body 401,
With after copper bearing steel continuous casting steel billet enters described heating furnace, heating first time period obtains richness at the first temperature
Copper phase layer thickness is less than first threshold or the hot base without copper-rich phase layer；Wherein, described first temperature is less than
Generate minimum temperature in copper-rich phase, or described first temperature is more than or equal to 1280 DEG C；So that described hot base through after
After treatment process, it is thus achieved that copper brittleness surface defect recall rate is less than the coils of hot-rolled steel of Second Threshold.
The operation principle of heating furnace in the present embodiment, is described in detail, for description in embodiment one
Succinct, be just not repeated at this.
Technical scheme in above-mentioned the embodiment of the present application, at least has the following technical effect that or advantage:
The method of the embodiment of the present application offer and heating furnace, on the one hand, as long as owing to heating-up temperature is in solidus
Below temperature, just will not produce liquid copper-rich phase, and in the copper bearing steel continuous casting steel billet adding Ni, copper-rich phase
Generate minimum temperature higher than the fusing point 1083 DEG C of copper, therefore heating-up temperature is set less than or equal to copper-rich interpromoting relation in five elements
Become minimum temperature, be possible not only to stop generating copper-rich phase layer, also require to reduce to firing equipment, be conducive to increasing
Add the motility producing line operation.On the other hand, it it is 1200 DEG C during copper diffusion coefficient in steel 1300 DEG C
Time 2 times, after temperature raises, the liquid phase of copper rapidly to the matrix internal diffusion of steel, and then can alleviate or disappear
Except copper-rich phase layer；Therefore when heating-up temperature >=1280 DEG C, " copper brittleness " defect substantially eliminates.
Although preferred embodiments of the present invention have been described, but those skilled in the art once know base
This creativeness concept, then can make other change and amendment to these embodiments.So, appended right is wanted
Ask and be intended to be construed to include preferred embodiment and fall into all changes and the amendment of the scope of the invention.
Obviously, those skilled in the art can carry out various change and modification without deviating from this to the present invention
Bright spirit and scope.So, if the present invention these amendment and modification belong to the claims in the present invention and
Within the scope of its equivalent technologies, then the present invention is also intended to comprise these change and modification.
Claims (10)
1. copper bearing steel continuous casting steel billet heating means, it is characterised in that described method includes:
Described copper bearing steel continuous casting steel billet enters in hot-rolled process heating furnace, heats the very first time at the first temperature
Section, it is thus achieved that copper-rich phase layer thickness is less than first threshold or the hot base without copper-rich phase layer；Wherein, described first
Temperature generates minimum temperature less than or equal to copper-rich phase, or described first temperature is more than or equal to 1280 DEG C；
After the described post-treated operation of hot base, it is thus achieved that copper brittleness surface defect recall rate is less than the hot rolling of Second Threshold
Coil of strip.
2. the method for claim 1, it is characterised in that after the described post-treated operation of hot base,
Obtain the copper brittleness surface defect recall rate coils of hot-rolled steel less than Second Threshold, particularly as follows:
After described hot base goes out described heating furnace, successively after de-scaling, roughing, finish rolling, cooling down and crimp, obtain
Obtain the copper brittleness surface defect recall rate described coils of hot-rolled steel less than Second Threshold.
3. the method for claim 1, it is characterised in that the composition of described copper bearing steel continuous casting steel billet
And the percentage by weight of described composition is:
C≤0.20%, Si≤0.60%, Mn≤2.0%, P≤0.15%, S≤0.01%, Cr≤1.0%,
Cu:0.2～1.0%, Ni≤0.2%.
4. the method for claim 1, it is characterised in that the width of described copper bearing steel continuous casting steel billet
For 800mm～2150mm.
5. the method for claim 1, it is characterised in that described first time period is more than or equal to
20min。
6. the method for claim 1, it is characterised in that described copper-rich phase generates minimum temperature root
Determine according to the solidus of Cu-Ni phasor.
7. the method for claim 1, it is characterised in that described copper-rich phase layer is described copper bearing steel
The base layer of the thickness≤3mm of slab surface, Cu content ＞ 0.6%.
8. the method for claim 1, it is characterised in that described hot base is through described heating furnace
After heating, the temperature copper bearing steel continuous casting steel billet higher than 1000 DEG C.
9. the method as described in claim 1-8 is arbitrary, it is characterised in that described first temperature is according to institute
The device parameter stating heating furnace determines；Described device parameter includes mill speed.
10. a hot-rolled process heating furnace, it is characterised in that including:
Heating furnace body；
Temperature control unit, is the first temperature for controlling the heating-up temperature of described heating furnace body, to contain
After copper steel continuous casting steel billet enters described heating furnace, heating first time period obtains copper-rich phase layer at the first temperature
Thickness is less than first threshold or the hot base without copper-rich phase layer；Wherein, described first temperature is less than or equal to copper-rich
Generate minimum temperature mutually, or described first temperature is more than or equal to 1280 DEG C；So that the described post-treated work of hot base
After sequence, it is thus achieved that copper brittleness surface defect recall rate is less than the coils of hot-rolled steel of Second Threshold.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610294139.0A CN105964704A (en) | 2016-05-05 | 2016-05-05 | Copper-containing steel continuous casting slab heating method and hot rolling process heating furnace |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610294139.0A CN105964704A (en) | 2016-05-05 | 2016-05-05 | Copper-containing steel continuous casting slab heating method and hot rolling process heating furnace |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN105964704A true CN105964704A (en) | 2016-09-28 |
Family
ID=56991887
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610294139.0A Pending CN105964704A (en) | 2016-05-05 | 2016-05-05 | Copper-containing steel continuous casting slab heating method and hot rolling process heating furnace |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN105964704A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110423949A (en) * | 2019-09-11 | 2019-11-08 | 武汉钢铁有限公司 | A kind of copper bearing steel and production method of the surface without peeling defect |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101289728A (en) * | 2007-04-20 | 2008-10-22 | 宝山钢铁股份有限公司 | Low-yield ratio, high heat input welding, high-strength and high ductility steel plate and method of manufacture |
| CN101956138A (en) * | 2010-07-22 | 2011-01-26 | 首钢总公司 | Productions method of Cu-contained low-alloy steel |
| CN103882315A (en) * | 2012-12-20 | 2014-06-25 | 上海梅山钢铁股份有限公司 | Making method of sulfuric acid dew point corrosion resistant hot continuous rolled steel |
-
2016
- 2016-05-05 CN CN201610294139.0A patent/CN105964704A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101289728A (en) * | 2007-04-20 | 2008-10-22 | 宝山钢铁股份有限公司 | Low-yield ratio, high heat input welding, high-strength and high ductility steel plate and method of manufacture |
| CN101956138A (en) * | 2010-07-22 | 2011-01-26 | 首钢总公司 | Productions method of Cu-contained low-alloy steel |
| CN103882315A (en) * | 2012-12-20 | 2014-06-25 | 上海梅山钢铁股份有限公司 | Making method of sulfuric acid dew point corrosion resistant hot continuous rolled steel |
Non-Patent Citations (1)
| Title |
|---|
| 韩乐等: "耐候钢铜脆缺陷的分析与控制", 《河北冶金》 * |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110423949A (en) * | 2019-09-11 | 2019-11-08 | 武汉钢铁有限公司 | A kind of copper bearing steel and production method of the surface without peeling defect |
| CN110423949B (en) * | 2019-09-11 | 2021-03-16 | 武汉钢铁有限公司 | Copper-containing steel without surface peeling defect and production method thereof |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN103710507B (en) | A kind of preparation method of low nickel duplex stainless steel hot-rolled sheet coil | |
| CN107002160A (en) | Method for preparing the electric furnace steel band with the crystal grain non-oriented spent under high cold rolling | |
| CN108546814A (en) | A method of high magnetic induction grain-oriented silicon steel is produced based on ESP Endless Rolling Technologies | |
| CN110819893A (en) | Austenitic stainless steel for electronic products and preparation method thereof | |
| CN102337462B (en) | Production method for GCr15 bearing steel pipe | |
| CN107488815A (en) | A kind of medium temperature orientation silicon steel hot rolled strip and preparation method thereof | |
| CN104308461B (en) | A kind of titanium alloy tube and production method thereof | |
| CN110093491A (en) | A kind of cold-rolled galvanized duplex steel and its manufacturing method | |
| CN110172601A (en) | A kind of preparation method of ESH state C19400 copper alloy band | |
| CN103510001B (en) | A kind of double coiled welded tube cold-rolled steel sheet and production method thereof | |
| CN108411205A (en) | The method that CSP flows produce high-magnetic induction, low-iron loss non-oriented electrical steel | |
| CN108374130A (en) | The method of non-orientation silicon steel and bar strip continuous casting and rolling flow path production non-orientation silicon steel | |
| CN107829043A (en) | A kind of near-net forming preparation method of super-duplex stainless steel strip | |
| CN106001128A (en) | Weather-resistant steel coil surface quality control method and hot rolling process heating furnace | |
| CN107177788A (en) | A kind of secondary cold-rolling tin plate and its production method | |
| CN110306115A (en) | Control method for point-like warping defect on surface of hot-rolled SPA-H strip steel | |
| CN107164624B (en) | Method for controlling pockmark defects on surface of phosphorus-containing cold-rolled high-strength steel | |
| CN103757534A (en) | Cold-rolled steel plate with good flange welding property and production method of cold-rolled steel plate | |
| CN105964704A (en) | Copper-containing steel continuous casting slab heating method and hot rolling process heating furnace | |
| CN108504952A (en) | The method that thin slab continuous casting and rolling produces new-energy automobile non-oriented electrical steel | |
| CN108504925A (en) | A kind of short route hot rolling Q＆P steel plates and preparation method thereof | |
| CN110157979A (en) | A kind of milling method improving plate surface quality | |
| CN106756528A (en) | A kind of nitrogen medium managese steel strip high and its near-net forming preparation method | |
| CN106399832B (en) | High strength, high heat input energy steel plate for welding and preparation method thereof | |
| JPWO2020067236A1 (en) | Manufacturing method of grain-oriented electrical steel sheet and cold rolling equipment |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20160928 |
|
| RJ01 | Rejection of invention patent application after publication |