CN107299201B - Eliminate carbon content 0.40% or more cold rolling steel saw blade surface layer crackle method - Google Patents
Eliminate carbon content 0.40% or more cold rolling steel saw blade surface layer crackle method Download PDFInfo
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- CN107299201B CN107299201B CN201710601201.0A CN201710601201A CN107299201B CN 107299201 B CN107299201 B CN 107299201B CN 201710601201 A CN201710601201 A CN 201710601201A CN 107299201 B CN107299201 B CN 107299201B
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- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D1/00—General methods or devices for heat treatment, e.g. annealing, hardening, quenching or tempering
- C21D1/26—Methods of annealing
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- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D8/00—Modifying the physical properties by deformation combined with, or followed by, heat treatment
- C21D8/02—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips
- C21D8/0221—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips characterised by the working steps
- C21D8/0226—Hot rolling
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D8/00—Modifying the physical properties by deformation combined with, or followed by, heat treatment
- C21D8/02—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips
- C21D8/0221—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips characterised by the working steps
- C21D8/0236—Cold rolling
-
- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23G—CLEANING OR DE-GREASING OF METALLIC MATERIAL BY CHEMICAL METHODS OTHER THAN ELECTROLYSIS
- C23G1/00—Cleaning or pickling metallic material with solutions or molten salts
- C23G1/02—Cleaning or pickling metallic material with solutions or molten salts with acid solutions
- C23G1/04—Cleaning or pickling metallic material with solutions or molten salts with acid solutions using inhibitors
-
- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23G—CLEANING OR DE-GREASING OF METALLIC MATERIAL BY CHEMICAL METHODS OTHER THAN ELECTROLYSIS
- C23G1/00—Cleaning or pickling metallic material with solutions or molten salts
- C23G1/02—Cleaning or pickling metallic material with solutions or molten salts with acid solutions
- C23G1/08—Iron or steel
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Mechanical Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Thermal Sciences (AREA)
- Crystallography & Structural Chemistry (AREA)
- Physics & Mathematics (AREA)
- Chemical Kinetics & Catalysis (AREA)
- General Chemical & Material Sciences (AREA)
- Cleaning And De-Greasing Of Metallic Materials By Chemical Methods (AREA)
- Manufacturing Of Steel Electrode Plates (AREA)
Abstract
The invention discloses it is a kind of elimination carbon content 0.40% or more cold rolling steel saw blade surface layer crackle method, comprising: by molten iron and processing after, by converter smelting, LF refining obtain slab；After the slab is heated, hot rolled plate is obtained using roughing, finish rolling；The hot rolled plate is subjected to cooling cooling stage by stage, coils into hot rolled coil after cooling；Chill volume is obtained after the hot rolled coil is carried out cold rolling；The chill volume is obtained to finished product after flattened, pickling, inhibitor is used in acid cleaning process, in 0.08-0.12%, the speed of the pickling is greater than 80m/min for the concentration control of the inhibitor, and the temperature of the acid solution is controlled at 75 DEG C -80 DEG C.The application is by control acid liquor temperature, pickling speed and inhibitor is added in acid solution, corrosion of the acid solution to steel saw blade crystal boundary can be effectively improved, the generation for improving pattern cracking, solves the technical issues of cold rolling steel saw blade surface layer crackle in the prior art, improves final product quality.
Description
Technical field
The present invention relates to iron and steel smelting technology field, in particular to a kind of carbon content of eliminating is sawed in 0.40% or more cold rolling
The method of piece steel surface layer crackle.
Background technique
In recent years, carbon manganese steel is widely used in the production of cold rolling steel saw blade, during client uses steel saw blade, generally needs
Impewdance matching is carried out, the techniques such as dust, after spray family is dusted on cold rolling saw blade surface layer, surface is readily produced Blister, shadow powder
There is gas to be formed after dusting between layer and matrix, the blistering for the layer that causes to dust carries out analysis to blistering position and finds, cold rolling saw
There are a large amount of fine cracks on piece steel surface layer, influence the normal use of client.
Studies have shown that cold rolling steel saw blade production process undergoes hot rolling, pickling, cold rolling etc. more since slab in the prior art
Process.Since phosphorus content is higher, cold rolling steel saw blade is easily formed decarburized layer in process of production.In acid cleaning process, acid solution is easy to
Preferentially steel saw blade crystal boundary is formed and is corroded, to form pattern cracking.In cold-rolled process, since steel saw blade hardness is big, need
Carry out nine passage cold rollings.And the pattern cracking formed in the decarburized layer and acid cleaning process that hot rolling is formed is easy to lose in cold rolling process
It passes, cold rolling of multi-pass itself also forms the crackle with orientation.Therefore it is cold to be effectively improved to need to develop a method
Roll steel saw blade surface layer crack defect.
Summary of the invention
The embodiment of the present application is by providing a kind of cold rolling steel saw blade surface layer crackle of elimination carbon content 0.40% or more
Method solves the technical issues of cold rolling steel saw blade surface layer crackle in the prior art, improves final product quality.
In order to solve the above technical problems, the cold rolling steel saw blade the present invention provides a kind of elimination carbon content 0.40% or more
The method of surface layer crackle, comprising:
After molten iron and processing, slab is obtained by converter smelting, LF refining；
After the slab is heated, hot rolled plate is obtained using roughing, finish rolling；
The hot rolled plate is subjected to cooling cooling stage by stage, coils into hot rolled coil after cooling；
Chill volume is obtained after the hot rolled coil is carried out cold rolling；
The chill volume obtains to finished product after flattened, pickling, uses inhibitor in acid cleaning process, the inhibitor it is dense
In 0.08-0.12%, the speed of the pickling is greater than 80m/min for degree control, and the temperature of the acid solution is controlled at 75 DEG C -80 DEG C.
Further, when the slab being heated, soaking section temperature control is being less than or equal to 1200 DEG C, and soaking zone exists
The control of furnace time is being less than or equal to 200 minutes.
Further, when the slab being heated, soaking section temperature is controlled between 1150 DEG C -1200 DEG C.
Further, the cold rolling carries out 9 passes altogether, four-pass rolling before first carrying out the hot rolled coil, then
A time bell-type annealing is carried out, five passes is finally carried out and obtains the chill volume.
Further, at 630 DEG C -670 DEG C, annealing time was controlled at 20 hours for the temperature control of the bell-type annealing.
Further, preferably, the temperature of the bell-type annealing is controlled at 650 DEG C.
Further, preferably, the concentration of the inhibitor is controlled 0.1%.
One or more technical solutions provided in the embodiments of the present application have at least the following technical effects or advantages:
The application is by control acid liquor temperature, pickling speed and inhibitor is added in acid solution, can be effectively improved acid solution pair
The corrosion of steel saw blade crystal boundary improves the generation of pattern cracking, solves the technology of cold rolling steel saw blade surface layer crackle in the prior art
Problem improves final product quality.
Detailed description of the invention
Fig. 1 is cold rolling steel saw blade surface layer crackle of the elimination carbon content that provides of the embodiment of the present application one 0.40% or more
The flow diagram of method.
Fig. 2 is the cold rolling steel saw blade surface layer crackle effect picture that the prior art provides；
Fig. 3 is the cold rolling steel saw blade surface layer crackle effect picture that the embodiment of the present application one provides.
Specific embodiment
The present invention provides it is a kind of elimination carbon content 0.40% or more cold rolling steel saw blade surface layer crackle method, pass through
Hot rolling heating temperature and heating time are controlled, inhibitor is added in acid solution, guarantees pickling speed and uses appropriate pickling temperature
Spend section；Increase annealing operation in cold rolling pass, cold rolling steel saw blade surface layer crack defect can be effectively improved, so that final products
Quality is significantly improved.
In order to better understand the above technical scheme, in conjunction with appended figures and specific embodiments to upper
Technical solution is stated to be described in detail.
Embodiment one
The embodiment of the invention provides it is a kind of elimination carbon content 0.40% or more cold rolling steel saw blade surface layer crackle side
Method, comprising:
Step S1: after molten iron and processing, slab is obtained by converter smelting, LF refining；
Step S2: after slab is heated, hot rolled plate is obtained using roughing, finish rolling；When slab is heated,
The control of hot arc temperature is being less than or equal to 1200 DEG C, and the control of soaking zone time inside furnace is being less than or equal to 200 minutes.Soaking section temperature is excellent
Choosing value controls between 1150 DEG C -1200 DEG C.
Step S3: hot rolled plate is subjected to cooling stage by stage and is cooled down, coils into hot rolled coil after cooling；
Step S4: chill volume is obtained after hot rolled coil is carried out cold rolling；Cold rolling carries out 9 passes altogether, first involves in hot rolling
Four-pass rolling before row, then carries out a time bell-type annealing, finally carries out five passes and obtains chill volume.Bell-type annealing
At 630 DEG C -670 DEG C, annealing time was controlled at 16-20 hours for temperature control.Preferably, the temperature control of bell-type annealing exists
650 DEG C, annealing time was controlled at 20 hours.
Step S5: obtaining finished product after chill volume is flattened, pickling, uses inhibitor in acid cleaning process, inhibitor it is dense
In 0.08-0.12%, the speed of pickling is greater than 80m/min for degree control, and the temperature of acid solution is controlled at 75 DEG C -80 DEG C.As preferred
, the concentration of inhibitor is controlled 0.1%.
It, first will be by controlling slab residence time and heating temperature in heating furnace, by slab in the embodiment of the present application
When being heated, soaking section temperature control is being less than or equal to 1200 DEG C, and the control of soaking zone time inside furnace is being less than or equal to 200 points
Clock.Soaking section temperature preferred value controls between 1150 DEG C -1200 DEG C.Strip superficial decarbonization phenomenon can be effectively improved.The temperature
Range can be obtained by Optimal Scheduling.If being higher than the temperature range, it will cause the generation of steel saw blade decarburization phenomenon, be lower than the humidity province
Between, then cause finish rolling area roll-force excessive.If the prior art there is no specific requirement that, tapping temperature is generally controlled by 1200 DEG C or more
System.
Bell-type annealing is often only used to soften strip in the prior art, and addition bell-type annealing technique can increase to a certain degree
Product cost, therefore this technique is not used to control belt steel surface crackle by someone.Verified through applicant's test of many times, using
The method that bell-type annealing technique is added in nine passage cold-rolled process can be effectively improved and split due to rolling caused by more than rolling pass
Line.Applicant again by the way that by the control of the temperature of bell-type annealing, at 650 DEG C, annealing time was controlled at 20 hours, using the temperature and
Time can effectively release the accumulation for improving belt steel surface work-hardening effect, to control surface layer crackle.The prior art is adopted merely
With 9 passage tandem rollings, the effect cannot be obtained.
Inhibitor is added finally by control acid liquor temperature, pickling speed and in acid solution, the concentration of inhibitor is controlled
In 0.08-0.12%, the speed of pickling is greater than 80m/min, and the temperature of acid solution is controlled at 75 DEG C -80 DEG C.Preferably, inhibiting
The concentration of agent is controlled 0.1%.It can be effectively improved corrosion of the acid solution to steel saw blade crystal boundary, improve the generation of pattern cracking.The temperature
Degree and speed are verified repeatedly by applicant's test of many times, if temperature is excessively high or belt speed is excessively slow, crystal boundary is easy excessive erosion, if
Temperature is too low or belt speed is too fast, then be easy to cause iron scale cleaning dirty.
It is provided by the invention eliminate carbon content 0.40% or more cold rolling steel saw blade surface layer crackle method, utilize control
Slab residence time and heating temperature in heating furnace can be effectively improved strip superficial decarbonization phenomenon.By controlling acid solution temperature
Pickling speed and inhibitor is added in degree in acid solution, can be effectively improved corrosion of the acid solution to steel saw blade crystal boundary, improves pattern cracking
Generation.Using the method that bell-type annealing technique is added in nine passage cold-rolled process, can be effectively improved since rolling pass is more
Caused rolling crack, Fig. 2 are the cold rolling steel saw blade surface layer crackle effect picture that the prior art provides, and Fig. 3 is the embodiment of the present invention
The cold rolling steel saw blade surface layer crackle effect picture of offer.Have method simple above, it is easily operated, while improving final product quality
Also reduce production cost.
Embodiment two
It is provided in an embodiment of the present invention it is a kind of eliminate carbon content 0.40% or more cold rolling steel saw blade surface layer crackle side
Method, cold rolling steel saw blade of the especially suitable carbon content of method provided in an embodiment of the present invention 0.40% or more are implemented in the present invention
In example, the production instance of 65Mn grade cold rolling steel saw blade is provided:
Wherein, slab enters walking beam heating furnace and is heated, and slab soaking section temperature is 1180 DEG C；Soaking zone heat preservation
Time is 180 minutes.By reducing tapping temperature and reducing soaking time, the formation of surface of steel plate decarburization behavior is avoided.
Before carrying out cold rolling steel saw blade pickling process, inhibitor is added in acid tank, guarantees the concentration of inhibitor in acid tank
Be 0.1%, reduce in acid tank acid liquor temperature in advance to 78 DEG C, acid cleaning process except take the lead and magnetic tape trailer lifting speed in addition to, stability region is adopted
It is 130m/min with belt speed.
Strip enters cold rolling process after pickling, and cold rolling is carried out using single chassis reversable mill.Cold-rolled process point 9 passages into
Row, after carrying out 4 passes, strip is carried out bell-type annealing 20 hours, and annealing temperature is controlled at 650 DEG C.Continue after the completion of annealing
Five passage cold rollings production is carried out, product objective thickness is reached.Electronic Speculum observation is carried out after the completion of production, is compared with the traditional method, this
The cold rolling steel saw blade face crack of literary method production is greatly reduced.Client reacts good in subsequent use of dusting.
Embodiment three
It is provided in an embodiment of the present invention it is a kind of eliminate carbon content 0.40% or more cold rolling steel saw blade surface layer crackle side
Method, cold rolling steel saw blade of the especially suitable carbon content of method provided in an embodiment of the present invention 0.40% or more are implemented in the present invention
In example, the production instance of 65Mn grade cold rolling steel saw blade is provided:
Wherein, slab enters walking beam heating furnace and is heated, and slab soaking section temperature is 1160 DEG C；Soaking zone heat preservation
Time is 160 minutes.By reducing tapping temperature and reducing soaking time, the formation of surface of steel plate decarburization behavior is avoided.
Before carrying out cold rolling steel saw blade pickling process, inhibitor is added in acid tank, guarantees the concentration of inhibitor in acid tank
Be 0.09%, reduce in acid tank acid liquor temperature in advance to 76 DEG C, acid cleaning process except take the lead and magnetic tape trailer lifting speed in addition to, stability region is adopted
It is 140m/min with belt speed.
Strip enters cold rolling process after pickling, and cold rolling is carried out using single chassis reversable mill.Cold-rolled process point 9 passages into
Row, after carrying out 4 passes, strip is carried out bell-type annealing 18 hours, and annealing temperature is controlled at 670 DEG C.Continue after the completion of annealing
Five passage cold rollings production is carried out, product objective thickness is reached.Electronic Speculum observation is carried out after the completion of production, is compared with the traditional method, this
The cold rolling steel saw blade face crack of literary method production is greatly reduced.Client reacts good in subsequent use of dusting.
Example IV
It is provided in an embodiment of the present invention it is a kind of eliminate carbon content 0.40% or more cold rolling steel saw blade surface layer crackle side
Method, cold rolling steel saw blade of the especially suitable carbon content of method provided in an embodiment of the present invention 0.40% or more are implemented in the present invention
In example, the production instance of 65Mn grade cold rolling steel saw blade is provided:
Wherein, slab enters walking beam heating furnace and is heated, and slab soaking section temperature is 1170 DEG C；Soaking zone heat preservation
Time is 170 minutes.By reducing tapping temperature and reducing soaking time, the formation of surface of steel plate decarburization behavior is avoided.
Before carrying out cold rolling steel saw blade pickling process, inhibitor is added in acid tank, guarantees the concentration of inhibitor in acid tank
Be 0.11%, reduce in acid tank acid liquor temperature in advance to 77 DEG C, acid cleaning process except take the lead and magnetic tape trailer lifting speed in addition to, stability region is adopted
It is 120m/min with belt speed.
Strip enters cold rolling process after pickling, and cold rolling is carried out using single chassis reversable mill.Cold-rolled process point 9 passages into
Row, after carrying out 4 passes, strip is carried out bell-type annealing 16 hours, and annealing temperature is controlled at 660 DEG C.Continue after the completion of annealing
Five passage cold rollings production is carried out, product objective thickness is reached.Electronic Speculum observation is carried out after the completion of production, is compared with the traditional method, this
The cold rolling steel saw blade face crack of literary method production is greatly reduced.Client reacts good in subsequent use of dusting.
Embodiment five
It is provided in an embodiment of the present invention it is a kind of eliminate carbon content 0.40% or more cold rolling steel saw blade surface layer crackle side
Method, cold rolling steel saw blade of the especially suitable carbon content of method provided in an embodiment of the present invention 0.40% or more are implemented in the present invention
In example, the production instance of 65Mn grade cold rolling steel saw blade is provided:
Wherein, slab enters walking beam heating furnace and is heated, and slab soaking section temperature is 1150 DEG C；Soaking zone heat preservation
Time is 150 minutes.By reducing tapping temperature and reducing soaking time, the formation of surface of steel plate decarburization behavior is avoided.
Before carrying out cold rolling steel saw blade pickling process, inhibitor is added in acid tank, guarantees the concentration of inhibitor in acid tank
Be 0.12%, reduce in acid tank acid liquor temperature in advance to 75 DEG C, acid cleaning process except take the lead and magnetic tape trailer lifting speed in addition to, stability region is adopted
It is 150m/min with belt speed.
Strip enters cold rolling process after pickling, and cold rolling is carried out using single chassis reversable mill.Cold-rolled process point 9 passages into
Row, after carrying out 4 passes, strip is carried out bell-type annealing 17 hours, and annealing temperature is controlled at 640 DEG C.Continue after the completion of annealing
Five passage cold rollings production is carried out, product objective thickness is reached.Electronic Speculum observation is carried out after the completion of production, is compared with the traditional method, this
The cold rolling steel saw blade face crack of literary method production is greatly reduced.Client reacts good in subsequent use of dusting.Embodiment
Six
It is provided in an embodiment of the present invention it is a kind of eliminate carbon content 0.40% or more cold rolling steel saw blade surface layer crackle side
Method, cold rolling steel saw blade of the especially suitable carbon content of method provided in an embodiment of the present invention 0.40% or more are implemented in the present invention
In example, the production instance of 65Mn grade cold rolling steel saw blade is provided:
Wherein, slab enters walking beam heating furnace and is heated, and slab soaking section temperature is 1190 DEG C；Soaking zone heat preservation
Time is 190 minutes.By reducing tapping temperature and reducing soaking time, the formation of surface of steel plate decarburization behavior is avoided.
Before carrying out cold rolling steel saw blade pickling process, inhibitor is added in acid tank, guarantees the concentration of inhibitor in acid tank
Be 0.1%, reduce in acid tank acid liquor temperature in advance to 79 DEG C, acid cleaning process except take the lead and magnetic tape trailer lifting speed in addition to, stability region is adopted
It is 90m/min with belt speed.
Strip enters cold rolling process after pickling, and cold rolling is carried out using single chassis reversable mill.Cold-rolled process point 9 passages into
Row, after carrying out 4 passes, strip is carried out bell-type annealing 19 hours, and annealing temperature is controlled at 635 DEG C.Continue after the completion of annealing
Five passage cold rollings production is carried out, product objective thickness is reached.Electronic Speculum observation is carried out after the completion of production, is compared with the traditional method, this
The cold rolling steel saw blade face crack of literary method production is greatly reduced.Client reacts good in subsequent use of dusting.
It should be noted last that the above specific embodiment is only used to illustrate the technical scheme of the present invention and not to limit it,
Although being described the invention in detail referring to example, those skilled in the art should understand that, it can be to the present invention
Technical solution be modified or replaced equivalently, without departing from the spirit and scope of the technical solution of the present invention, should all cover
In the scope of the claims of the present invention.
Claims (4)
1. it is a kind of eliminate carbon content 0.40% or more cold rolling steel saw blade surface layer crackle method, it is characterised in that:
Slab is entered into walking beam heating furnace and carries out heating acquisition strip, the slab soaking section temperature is 1180 DEG C；Soaking
Section soaking time is 180 minutes；
Before the strip is carried out cold rolling steel saw blade pickling process, inhibitor is added in acid tank, guarantees inhibitor in acid tank
Concentration is 0.1%, reduces in acid tank acid liquor temperature in advance to 78 DEG C, acid cleaning process except take the lead and magnetic tape trailer lifting speed in addition to, stable region
Domain uses belt speed for 130m/min；
The strip after overpickling is entered into cold rolling process, cold rolling is carried out using single chassis reversable mill, cold-rolled process point 9
Passage carries out, and carries out bell-type annealing 20 hours after the strip 4 passes of progress, then by the strip, annealing temperature control
System continues five passage cold rollings production at 650 DEG C, by the strip after the completion of annealing, reaches product objective thickness.
2. it is a kind of eliminate carbon content 0.40% or more cold rolling steel saw blade surface layer crackle method, it is characterised in that:
Slab is entered into walking beam heating furnace and carries out heating acquisition strip, the slab soaking section temperature is 1160 DEG C, soaking
Section soaking time is 160 minutes；
By the strip before carrying out cold rolling steel saw blade pickling process, inhibitor is added in acid tank, guarantees inhibitor in acid tank
Concentration be 0.09%, reduce in acid tank acid liquor temperature in advance to 76 DEG C, acid cleaning process except take the lead and magnetic tape trailer lifting speed in addition to, stablize
Region uses belt speed for 140m/min；
The strip after overpickling is entered into cold rolling process, cold rolling is carried out using single chassis reversable mill, cold-rolled process point 9
Passage carries out, and carries out bell-type annealing 18 hours after the strip 4 passes of progress, then by the strip, annealing temperature control
System continues five passage cold rollings production at 670 DEG C, by the strip after the completion of annealing, reaches product objective thickness.
3. it is a kind of eliminate carbon content 0.40% or more cold rolling steel saw blade surface layer crackle method, it is characterised in that:
Slab is entered into walking beam heating furnace and carries out heating acquisition strip, the slab soaking section temperature is 1170 DEG C, soaking
Section soaking time is 170 minutes；
Before the strip is carried out cold rolling steel saw blade pickling process, inhibitor is added in acid tank, guarantees inhibitor in acid tank
Concentration is 0.11%, reduces in acid tank acid liquor temperature in advance to 77 DEG C, acid cleaning process except take the lead and magnetic tape trailer lifting speed in addition to, stable region
Domain uses belt speed for 120m/min；
The strip after overpickling is entered into cold rolling process, cold rolling is carried out using single chassis reversable mill, cold-rolled process point 9
Passage carries out, and carries out bell-type annealing 16 hours after the strip 4 passes of progress, then by the strip, annealing temperature control
System continues five passage cold rollings production at 660 DEG C, by the strip after the completion of annealing, reaches product objective thickness.
4. it is a kind of eliminate carbon content 0.40% or more cold rolling steel saw blade surface layer crackle method, it is characterised in that:
Slab is entered into walking beam heating furnace and carries out heating acquisition strip, the slab soaking section temperature is 1190 DEG C；Soaking
Section soaking time is 190 minutes；
Before the strip is carried out cold rolling steel saw blade pickling process, inhibitor is added in acid tank, guarantees inhibitor in acid tank
Concentration is 0.1%, reduces in acid tank acid liquor temperature in advance to 79 DEG C, acid cleaning process except take the lead and magnetic tape trailer lifting speed in addition to, stable region
Domain uses belt speed for 90m/min；
The strip after pickling is entered into cold rolling process, cold rolling is carried out using single chassis reversable mill, 9 passages of cold-rolled process point
It carries out, after the strip is carried out 4 passes, then by strip progress bell-type annealing 19 hours, annealing temperature control exists
635 DEG C, the strip after the completion of annealing is continued into five passage cold rollings production, reaches product objective thickness.
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| CN201710601201.0A CN107299201B (en) | 2017-07-21 | 2017-07-21 | Eliminate carbon content 0.40% or more cold rolling steel saw blade surface layer crackle method |
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| CN201710601201.0A CN107299201B (en) | 2017-07-21 | 2017-07-21 | Eliminate carbon content 0.40% or more cold rolling steel saw blade surface layer crackle method |
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| CN107299201B true CN107299201B (en) | 2019-09-03 |
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