CN106086350A - A kind of processing technique of strip steel - Google Patents
A kind of processing technique of strip steel Download PDFInfo
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- CN106086350A CN106086350A CN201610755057.1A CN201610755057A CN106086350A CN 106086350 A CN106086350 A CN 106086350A CN 201610755057 A CN201610755057 A CN 201610755057A CN 106086350 A CN106086350 A CN 106086350A
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- annealing furnace
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- roll bending
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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
- C21D1/32—Soft annealing, e.g. spheroidising
-
- 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
- C21D8/0247—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips characterised by the heat treatment
- C21D8/0273—Final recrystallisation annealing
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B1/00—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations
- B21B1/22—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations for rolling plates, strips, bands or sheets of indefinite length
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B15/00—Arrangements for performing additional metal-working operations specially combined with or arranged in, or specially adapted for use in connection with, metal-rolling mills
- B21B15/0007—Cutting or shearing the product
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21C—MANUFACTURE OF METAL SHEETS, WIRE, RODS, TUBES OR PROFILES, OTHERWISE THAN BY ROLLING; AUXILIARY OPERATIONS USED IN CONNECTION WITH METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL
- B21C37/00—Manufacture of metal sheets, bars, wire, tubes or like semi-manufactured products, not otherwise provided for; Manufacture of tubes of special shape
- B21C37/02—Manufacture of metal sheets, bars, wire, tubes or like semi-manufactured products, not otherwise provided for; Manufacture of tubes of special shape of sheets
-
- 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
- C21D1/74—Methods of treatment in inert gas, controlled atmosphere, vacuum or pulverulent material
-
- 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
- C21D8/0205—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips of ferrous alloys
-
- 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
- C21D8/0247—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips characterised by the heat treatment
-
- 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
- C21D9/00—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor
- C21D9/52—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor for wires; for strips ; for rods of unlimited length
-
- 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
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B15/00—Arrangements for performing additional metal-working operations specially combined with or arranged in, or specially adapted for use in connection with, metal-rolling mills
- B21B15/0007—Cutting or shearing the product
- B21B2015/0021—Cutting or shearing the product in the rolling direction
Abstract
The present invention relates to the processing technique of a kind of strip steel, comprise the steps: to choose the hot-rolled coil that the trade mark is SCM435；Longitudinal shearing slitting for the first time will be carried out；The hot-rolled coil of first time longitudinal shearing slitting is carried out soft annealing by annealing furnace/ammonia destruction furnace, prepares soft annealing roll bending；Soft annealing roll bending is carried out pickling, and prepared pickling roll bending；Pickling roll bending is rolled, and prepares rolling roll bending；Rolling roll bending is carried out spheroidizing by annealing furnace/ammonia destruction furnace, prepares spheroidizing roll bending；Spheroidizing roll bending is carried out finish rolling, and prepared finish rolling roll bending；Finish rolling roll bending is carried out second time longitudinal shearing slitting by little banding machine, and prepares a point bar roll bending；Packaging is put in storage, is utilized baling press that a point bar roll bending carries out packing packaging.The invention has the beneficial effects as follows: can stabilized product quality, raise labour productivity.
Description
Technical field
The present invention relates to strip steel production and processing technical field, particularly relate to the processing technique of a kind of strip steel.
Background technology
It is known that strip steel is a kind of narrow and long steel plate produced to adapt to different industrial department needs.It is wide
Degree is general within 300mm, but along with economic development, width does not the most limit.Strip steel rolling is supplied, have dimensional accuracy high,
Surface quality is good, be easy to processing, save the advantages such as material, is widely used in production welded still pipe, makees the blank of cold-rolled forming section, manufactures
Cycle frame, wheel rim, clip, packing ring, spring leaf, saw blade and blade, the sole of Labor protection shoes and the first-class field of ladle.
Being affected by the processing technique of current strip steel, its strip quality produced is not sufficiently stable, in production process
In defective work easily occurs, cause whole production efficiency ratio relatively low..
Summary of the invention
The technical problem to be solved be to provide a kind of can stabilized product quality, the band raised labour productivity
The processing technique of steel.
The technical scheme is that the processing technique of a kind of strip steel, comprise the steps:
Step one, prepare raw material, choose the hot-rolled coil that the trade mark is SCM435；
Step 2, for the first time longitudinal shearing slitting, the hot-rolled coil got ready in step one is transported to first by row device for hoisting
Longitudinal shearing slitting for the first time is carried out on big splitting production line；
Step 3, soft annealing, the hot-rolled coil completing for the first time longitudinal shearing slitting is transported to annealing by row device for hoisting
In stove/ammonia destruction furnace, first, annealing furnace is warming up to 400 DEG C at full speed, and after being warming up to 400 DEG C, is incubated 1h to 5h, secondly,
After annealing furnace is incubated 1h to 5h at a temperature of 400 DEG C, annealing furnace is warming up in 1h to 6h 600 DEG C, and is being warming up to 600
0.5h to 4h it is incubated, again, after annealing furnace is incubated 0.5h to 4h at a temperature of 600 DEG C, by annealing furnace in 1h to 5h after DEG C
Be warming up to 690 DEG C, and after being warming up to 690 DEG C be incubated 0.5h to 4h, the 4th, annealing furnace at a temperature of 690 DEG C, be incubated 0.5h
To 4h, annealing furnace is warming up in 1h to 5h 710 DEG C to 730 DEG C, and is incubated 10h extremely after being warming up to 710 DEG C to 730 DEG C
18h, the 5th, after annealing furnace is incubated 10h to 18h at a temperature of 710 DEG C to 730 DEG C, the mode using furnace cooling will annealing
Stove cooling 4h to 8h, the 6th, use furnace cooling mode to annealing furnace cooling 4h to 8h after, annealing furnace is changed cover wind
Cold, and the temperature of annealing furnace is down to 280 DEG C, the 7th, after the temperature of annealing furnace is down to 280 DEG C, uses the mode of water-cooled, will move back
The temperature of stove is down to 80 DEG C by 280 DEG C, finally, comes out of the stove, and prepares soft annealing roll bending；
Step 4, pickling, the soft annealing roll bending that soft annealing obtained are transported to pickling lines by row device for hoisting
On carry out pickling, and prepared pickling roll bending；
Step 5, rolling, it is transported on production line of rolling mill carry out by row device for hoisting by the pickling roll bending obtained after pickling
Rolling, and prepare rolling roll bending；
Step 6, spheroidizing, the rolling roll bending that obtains will be transported to annealing furnace/ammonolysis craft by row device for hoisting after rolling
Carry out spheroidizing in stove, first, annealing furnace is warming up to 400 DEG C at full speed, and after being warming up to 400 DEG C, be incubated 1h to 5h, its
After secondary, annealing furnace is incubated 1h to 5h at a temperature of 400 DEG C, annealing furnace is warming up in 1h to 6h 640 DEG C, and is being warming up to
0.5h to 4h it is incubated, again, after annealing furnace is incubated 0.5h to 4h at a temperature of 640 DEG C, by annealing furnace at 1h to 5h after 640 DEG C
Inside it is warming up to 730 DEG C, and after being warming up to 730 DEG C, is incubated 0.5h to 4h, the 4th, annealing furnace is incubated at a temperature of 730 DEG C
After 0.5h to 4h, annealing furnace is warming up in 0.5h to 2h 740 DEG C to 760 DEG C, and protects after being warming up to 740 DEG C to 760 DEG C
Temperature 10h to 16h, the 5th, after annealing furnace be incubated 10h to 16h at a temperature of 740 DEG C to 760 DEG C, the mode of employing furnace cooling
The temperature of annealing furnace is down to 550 DEG C to 600 DEG C, the 6th, use furnace cooling mode the temperature of annealing furnace is down to 550
DEG C to after 600 DEG C, annealing furnace is changed cover air-cooled, and the temperature of annealing furnace is down to 280 DEG C, the 7th, the temperature of annealing furnace
After being down to 280 DEG C, using the mode of water-cooled, by 280 DEG C, the temperature of annealing furnace is down to 80 DEG C, finally, come out of the stove, prepared nodularization is moved back
Fire roll bending；
Step 7, finish rolling, it is transported to roll production by row device for hoisting by the spheroidizing roll bending obtained after spheroidizing
Finish rolling, and prepared finish rolling roll bending is carried out on line；
Step 8, for the second time longitudinal shearing slitting, finish rolling roll bending finish rolling obtained are transported to little banding machine by row device for hoisting
On carry out second time longitudinal shearing slitting, and prepare a point bar roll bending；
Step 9, packaging are put in storage, are utilized baling press to pack a point bar roll bending obtained after second time longitudinal shearing slitting
Packaging.
The invention has the beneficial effects as follows: by when hot-rolled coil is carried out soft annealing, by whole soft annealing process
It is divided into some stages, and effectively controls the heating-up time in each stage, temperature retention time and the temperature in each stage well, and
When rolling roll bending is carried out spheroidizing, whole spheroidizing process is divided into some stages, and effectively controls well each
The heating-up time in individual stage, temperature retention time and the temperature in each stage, so that the constant product quality produced, product
Qualification rate gets a promotion, thus further improves labor productivity.
On the basis of technique scheme, the present invention can also do following improvement.
Further, in described step 3, when soft annealing, annealing furnace is warming up to 400 DEG C at full speed, and is being warming up to
1.5h to 3h it is incubated after 400 DEG C；After annealing furnace is incubated 1.5h to 3h at a temperature of 400 DEG C, annealing furnace is risen in 2h to 4h
Temperature is to 600 DEG C, and is incubated 0.6h to 2h after being warming up to 600 DEG C；After annealing furnace is incubated 0.6h to 2h at a temperature of 600 DEG C,
Annealing furnace is warming up in 1.5h to 3h 690 DEG C, and after being warming up to 690 DEG C, is incubated 0.6h to 2h；Annealing furnace is at 690 DEG C
At a temperature of be incubated after 0.6h to 2h, annealing furnace is warming up in 1.5h to 3h 710 DEG C to 730 DEG C, and is being warming up to 710 DEG C extremely
11h to 16h it is incubated after 730 DEG C；After annealing furnace is incubated 11h to 16h at a temperature of 710 DEG C to 730 DEG C, use furnace cooling
Annealing furnace is cooled down 4.5h to 7.2h by mode.
Further, when soft annealing, annealing furnace is warming up to 400 DEG C at full speed, and after being warming up to 400 DEG C, is incubated 1.8h
To 2.4h；After annealing furnace is incubated 1.8h to 2.4h at a temperature of 400 DEG C, annealing furnace is warming up in 2.8h to 3.4h 600
DEG C, and after being warming up to 600 DEG C, it is incubated 0.8h to 1.2h；After annealing furnace is incubated 0.8h to 1.2h at a temperature of 600 DEG C, will move back
Stove is warming up to 690 DEG C in 1.8h to 2.4h, and is incubated 0.8h to 1.2h after being warming up to 690 DEG C；Annealing furnace is at 690 DEG C
At a temperature of be incubated after 0.8h to 1.2h, annealing furnace is warming up in 1.8h to 2.4h 710 DEG C to 730 DEG C, and is being warming up to 710
DEG C to being incubated 11.2h to 15.6h after 730 DEG C；After annealing furnace is incubated 11.2h to 15.6h at a temperature of 710 DEG C to 730 DEG C, adopt
By the mode of furnace cooling, annealing furnace is cooled down 5.2h to 6.4h.
Further, in soft annealing, need to do detonation test before heating up, it is ensured that the purity of hydrogen in ammonia destruction furnace；
In whole intensification and insulating process, actual temperature value is less than 15 DEG C with the difference of process warm angle value.
Use and above-mentioned further provide the benefit that: can effectively guarantee the stability of soft annealing roll bending quality.
Further, in step 4, before carrying out pickling, need to be first with the metallurgical microscope Oxygen potential to soft annealing roll bending
Detect, and put into detecting qualified soft annealing roll bending on pickling lines.
Use and above-mentioned further provide the benefit that: the parameter in production technology can be adjusted in time according to detection data
Value, it is ensured that the quality of production.
Further, in step 6 when carrying out pickling, the minus tolerance of the thickness before and after soft annealing roll bending pickling is less than
0.15mm, the quantity of descaling bath is two, and the quantity of deactivation slot is one, and the quantity of neutralization chamber is one, two descaling baths
Pickling concentration is respectively 18% to 22%, 15% to 18%, and the sour position in two descaling baths is 380mm to 420mm, acid liquor temperature
Being 53 DEG C to 72 DEG C, the pH value of neutralization chamber is 11 to 13, and the pH value of deactivation slot is 7 to 8, the temperature value of deactivation slot be 38 DEG C to 51
DEG C, the cleaning speed of pickling lines is 5m/min to 15m/min.
Use and above-mentioned further provide the benefit that: can effectively remove the oxidation that roll bending produces during soft annealing
Skin, it is to avoid affect following process.
Further, in described step 3, when spheroidizing, annealing furnace is warming up to 400 DEG C at full speed, and is being warming up to
1.5h to 3h it is incubated after 400 DEG C；After annealing furnace is incubated 1.5h to 3h at a temperature of 400 DEG C, annealing furnace is risen in 2h to 4h
Temperature is to 640 DEG C, and is incubated 0.6h to 2h after being warming up to 640 DEG C；After annealing furnace is incubated 0.6h to 2h at a temperature of 640 DEG C,
Annealing furnace is warming up in 1.5h to 3h 730 DEG C, and after being warming up to 730 DEG C, is incubated 0.6h to 2h；Annealing furnace is at 730 DEG C
At a temperature of be incubated after 0.6h to 2h, annealing furnace is warming up in 0.5h to 1.8h 740 DEG C to 760 DEG C, and is being warming up to 740 DEG C
11h to 14h it is incubated after 760 DEG C.
Further, when spheroidizing, annealing furnace is warming up to 400 DEG C at full speed, and after being warming up to 400 DEG C, is incubated 1.8h
To 2.4h；After annealing furnace is incubated 1.8h to 2.4h at a temperature of 400 DEG C, annealing furnace is warming up in 2.5h to 3.2h 640
DEG C, and after being warming up to 640 DEG C, it is incubated 0.6h to 1.2h；After annealing furnace is incubated 0.6h to 1.2h at a temperature of 640 DEG C, will move back
Stove is warming up to 730 DEG C in 1.8h to 2.4h, and is incubated 0.6h to 1.2h after being warming up to 730 DEG C；Annealing furnace is at 730 DEG C
At a temperature of be incubated after 0.6h to 1.2h, annealing furnace is warming up in 0.6h to 1.2h 740 DEG C to 760 DEG C, and is being warming up to 740
DEG C to being incubated 12h to 13.5h after 760 DEG C.
Further, in spheroidizing, need to do detonation test before heating up, it is ensured that the purity of hydrogen in ammonia destruction furnace；
In whole intensification and insulating process, actual temperature value is less than 15 DEG C with the difference of process warm angle value.
Use and above-mentioned further provide the benefit that: can effectively guarantee the stability of spheroidizing roll bending quality.
Further, in step 8, before carrying out second time longitudinal shearing slitting, need to be first with universal testing machine and durometer to essence
The hardness rolling roll bending detects, and the acceptability limit of the hardness number of finish rolling roll bending is 75HRB to 85HRB；Hardness number is closed
The finish rolling roll bending of lattice carries out metallographic detection, is put on little banding machine by the metallographic the most qualified finish rolling roll bending of detection.
Use and above-mentioned further provide the benefit that: the parameter in production technology can be adjusted in time according to detection data
Value, it is ensured that the quality of production.
Accompanying drawing explanation
Fig. 1 be strip steel of the present invention processing technique in the curve chart of soft annealing；
Fig. 2 be strip steel of the present invention processing technique in the curve chart of spheroidizing；
Fig. 3 be strip steel of the present invention processing technique in metallographic detection metallographic with reference to figure.
Detailed description of the invention
Being described principle and the feature of the present invention below in conjunction with accompanying drawing, example is served only for explaining the present invention, and
Non-for limiting the scope of the present invention.
Embodiment one: as shown in Figure 1 and Figure 2, the processing technique of a kind of strip steel, comprise the steps:
Step one, prepare raw material, choose the hot-rolled coil that the trade mark is SCM435, wherein, the change of the hot-rolled coil of SCM435
The requirement studying part is: C:0.33 to 0.38, Si:0.15 to 0.35, Mn:0.60 to 0.90, P:0.030, S:0.030,
Cr:0.90 to 1.20, Ni:0.25, Mo:0.15 to 0.30；The requirement of the mechanical property of the hot-rolled coil of SCM435 is: tension
Intensity: 1000MPa；The requirement of the metallographic of the hot-rolled coil of SCM435 is: ferrite+pearlitic structrure, decarburized layer, works as thickness
>5mm, it is allowed to decarburization 1%t, wherein t is the thickness of hot rolled steel plate, as thickness 5mm, it is allowed to decarburization<50 μm, banded structure<
2 grades, field trash be carefully < 2 grades, in the present embodiment, the thickness choosing the hot-rolled coil that the trade mark is SCM435 is 3mm to 8.0mm,
Preferably 5mm to 6mm；
Step 2, for the first time longitudinal shearing slitting, the hot-rolled coil got ready in step one is transported to first by row device for hoisting
Carry out longitudinal shearing slitting for the first time, for convenience subsequent handling processing on big splitting production line, hot-rolled coil when slitting, width side
To the surplus of reserved about 0.5mm, the thickness tolerance of hot-rolled coil should meet the regulation of GB/T709, and convexity requires: thickness
Less than or equal to 3.0mm, convexity is less than or equal to 40 μm；Thickness is 3mm to 8.0mm, and convexity is less than or equal to 60 μm, and thickness is more than
8.0mm, convexity is less than or equal to 100 μm, and must not there be bubble, crackle in hot-rolled coil surface, scab, stick up skin, drawing crack and be mingled with, hot rolling
Roll bending must not have layering, and surface allows the deep pit of the slight pit within thickness deviation scope half and local, minute bubbles, light
Micro-scuffing and roll impression；Hot-rolled coil neat in edge, without zigzag, and when slitting blade datum end face beat should be little
In equal to 0.06mm；
Step 3, soft annealing, the hot-rolled coil completing for the first time longitudinal shearing slitting is transported to annealing by row device for hoisting
In stove/ammonia destruction furnace, first, annealing furnace is warming up to 400 DEG C at full speed, and after being warming up to 400 DEG C, is incubated 1h, secondly, anneal
After stove is incubated 1h at a temperature of 400 DEG C, annealing furnace is warming up in 1h 600 DEG C, and is incubated after being warming up to 600 DEG C
0.5h, again, after annealing furnace is incubated 0.5h at a temperature of 600 DEG C, is warming up to annealing furnace 690 DEG C in 1h, and heating up
0.5h it is incubated after 690 DEG C, the 4th, after annealing furnace is incubated 0.5h at a temperature of 690 DEG C, annealing furnace is warming up in 1h
710 DEG C to 730 DEG C, and after being warming up to 710 DEG C to 730 DEG C, be incubated 10h, the 5th, annealing furnace is the temperature of 710 DEG C to 730 DEG C
After lower insulation 10h, use furnace cooling mode annealing furnace is cooled down 4.5h, the 6th, use furnace cooling mode to moving back
After stove cooling 4.5h, annealing furnace is changed cover air-cooled, and the temperature of annealing furnace is down to 280 DEG C, the 7th, the temperature of annealing furnace
After degree is down to 280 DEG C, uses the mode of water-cooled, the temperature of annealing furnace is down to 80 DEG C by 280 DEG C, finally, come out of the stove, prepare and soften
Annealing roll bending；
Step 4, pickling, the soft annealing roll bending that soft annealing obtained are transported to pickling lines by row device for hoisting
On carry out pickling, and prepared pickling roll bending；
Step 5, rolling, it is transported on production line of rolling mill carry out by row device for hoisting by the pickling roll bending obtained after pickling
Rolling, and prepare rolling roll bending, wherein, the thickness after roll bending rolling is 4mm；
Step 6, spheroidizing, the rolling roll bending that obtains will be transported to annealing furnace/ammonolysis craft by row device for hoisting after rolling
Carry out spheroidizing in stove, first, annealing furnace is warming up to 400 DEG C at full speed, and after being warming up to 400 DEG C, be incubated 1h, secondly, move back
After stove is incubated 1h at a temperature of 400 DEG C, annealing furnace is warming up in 1h 640 DEG C, and is incubated after being warming up to 640 DEG C
0.5h, again, after annealing furnace is incubated 0.5h at a temperature of 640 DEG C, is warming up to annealing furnace 730 DEG C in 1h, and heating up
0.5h it is incubated after 730 DEG C, the 4th, after annealing furnace is incubated 0.5h at a temperature of 730 DEG C, annealing furnace is warming up in 0.5h
740 DEG C to 760 DEG C, and after being warming up to 740 DEG C to 760 DEG C, be incubated 10h, the 5th, annealing furnace is the temperature of 740 DEG C to 760 DEG C
After lower insulation 10h, use furnace cooling mode the temperature of annealing furnace is down to 550 DEG C to 600 DEG C, the 6th, use with stove
After the temperature of annealing furnace is down to 550 DEG C to 600 DEG C by the mode of cooling, annealing furnace is changed cover air-cooled, and by annealing furnace
Temperature is down to 280 DEG C, and the 7th, after the temperature of annealing furnace is down to 280 DEG C, use the mode of water-cooled, by the temperature of annealing furnace by 280
DEG C it is down to 80 DEG C, last, come out of the stove, prepare spheroidizing roll bending；
Step 7, finish rolling, it is transported to roll production by row device for hoisting by the spheroidizing roll bending obtained after spheroidizing
Carrying out finish rolling, and prepared finish rolling roll bending on line, wherein, the thickness of finish rolling roll bending is 3.5mm；
Step 8, for the second time longitudinal shearing slitting, finish rolling roll bending finish rolling obtained are transported to little banding machine by row device for hoisting
On carry out second time longitudinal shearing slitting, and prepare a point bar roll bending；
Step 9, packaging are put in storage, are utilized baling press to pack a point bar roll bending obtained after second time longitudinal shearing slitting
Packaging.
Embodiment two: as shown in Figure 1 and Figure 2, the processing technique of a kind of strip steel, comprise the steps:
Step one, prepare raw material, choose the hot-rolled coil that the trade mark is SCM435, wherein, the change of the hot-rolled coil of SCM435
The requirement studying part is: C:0.33 to 0.38, Si:0.15 to 0.35, Mn:0.60 to 0.90, P:0.030, S:0.030,
Cr:0.90 to 1.20, Ni:0.25, Mo:0.15 to 0.30；The requirement of the mechanical property of the hot-rolled coil of SCM435 is: tension
Intensity: 1000MPa；The requirement of the metallographic of the hot-rolled coil of SCM435 is: ferrite+pearlitic structrure, decarburized layer, works as thickness
>5mm, it is allowed to decarburization 1%t, wherein t is the thickness of hot rolled steel plate, as thickness 5mm, it is allowed to decarburization<50 μm, banded structure<
2 grades, field trash be carefully < 2 grades, in the present embodiment, the thickness choosing the hot-rolled coil that the trade mark is SCM435 is 3mm to 8.0mm,
Preferably 5mm to 6mm；
Step 2, for the first time longitudinal shearing slitting, the hot-rolled coil got ready in step one is transported to first by row device for hoisting
Carry out longitudinal shearing slitting for the first time, for convenience subsequent handling processing on big splitting production line, hot-rolled coil when slitting, width side
To the surplus of reserved about 0.5mm, the thickness tolerance of hot-rolled coil should meet the regulation of GB/T709, and convexity requires: thickness
Less than or equal to 3.0mm, convexity is less than or equal to 40 μm；Thickness is 3mm to 8.0mm, and convexity is less than or equal to 60 μm, and thickness is more than
8.0mm, convexity is less than or equal to 100 μm, and must not there be bubble, crackle in hot-rolled coil surface, scab, stick up skin, drawing crack and be mingled with, hot rolling
Roll bending must not have layering, and surface allows the deep pit of the slight pit within thickness deviation scope half and local, minute bubbles, light
Micro-scuffing and roll impression；Hot-rolled coil neat in edge, without zigzag, and when slitting blade datum end face beat should be little
In equal to 0.06mm；
Step 3, soft annealing, the hot-rolled coil completing for the first time longitudinal shearing slitting is transported to annealing by row device for hoisting
In stove/ammonia destruction furnace, first, annealing furnace is warming up to 400 DEG C at full speed, and after being warming up to 400 DEG C, is incubated 1.8h, secondly, move back
After stove is incubated 1.8h at a temperature of 400 DEG C, annealing furnace is warming up in 2.8h 600 DEG C, and protects after being warming up to 600 DEG C
Temperature 0.8h, again, after annealing furnace is incubated 0.8h at a temperature of 600 DEG C, is warming up to 690 DEG C in 1.8h by annealing furnace, and
0.8h it is incubated after being warming up to 690 DEG C, the 4th, after annealing furnace is incubated 0.8h at a temperature of 690 DEG C, annealing furnace is risen in 1.8h
Temperature is to 710 DEG C to 730 DEG C, and is incubated 11.2h after being warming up to 710 DEG C to 730 DEG C, and the 5th, annealing furnace is at 710 DEG C to 730 DEG C
At a temperature of be incubated after 11.2h, use the mode of furnace cooling that annealing furnace is cooled down 5.2h, the 6th, using furnace cooling
After mode is to annealing furnace cooling 5.2h, annealing furnace is changed cover air-cooled, and the temperature of annealing furnace is down to 280 DEG C, the 7th, move back
After the temperature of stove is down to 280 DEG C, uses the mode of water-cooled, the temperature of annealing furnace be down to 80 DEG C by 280 DEG C, finally, come out of the stove,
Prepare soft annealing roll bending；
Step 4, pickling, the soft annealing roll bending that soft annealing obtained are transported to pickling lines by row device for hoisting
On carry out pickling, and prepared pickling roll bending；
Step 5, rolling, it is transported on production line of rolling mill carry out by row device for hoisting by the pickling roll bending obtained after pickling
Rolling, and prepare rolling roll bending, wherein, the thickness after roll bending rolling is 4mm；
Step 6, spheroidizing, the rolling roll bending that obtains will be transported to annealing furnace/ammonolysis craft by row device for hoisting after rolling
Carry out spheroidizing in stove, first, annealing furnace is warming up to 400 DEG C at full speed, and after being warming up to 400 DEG C, be incubated 1.8h, secondly,
After annealing furnace is incubated 1.8h at a temperature of 400 DEG C, annealing furnace is warming up in 2.5h 640 DEG C, and after being warming up to 640 DEG C
Insulation 0.6h, again, after annealing furnace is incubated 0.6h at a temperature of 640 DEG C, is warming up to 730 DEG C in 1.8h by annealing furnace, and
0.6h it is incubated after being warming up to 730 DEG C, the 4th, after annealing furnace is incubated 0.6h at a temperature of 730 DEG C, by annealing furnace in 0.6h
It is warming up to 740 DEG C to 760 DEG C, and after being warming up to 740 DEG C to 760 DEG C, is incubated 12h, the 5th, annealing furnace is at 740 DEG C to 760 DEG C
At a temperature of be incubated after 12h, use the mode of furnace cooling that the temperature of annealing furnace is down to 550 DEG C to 600 DEG C, the 6th, adopting
After the temperature of annealing furnace being down to 550 DEG C to 600 DEG C by the mode of furnace cooling, annealing furnace is changed cover air-cooled, and will move back
The temperature of stove is down to 280 DEG C, and the 7th, after the temperature of annealing furnace is down to 280 DEG C, use the mode of water-cooled, by the temperature of annealing furnace
Degree is down to 80 DEG C by 280 DEG C, finally, comes out of the stove, and prepares spheroidizing roll bending；
Step 7, finish rolling, it is transported to roll production by row device for hoisting by the spheroidizing roll bending obtained after spheroidizing
Carrying out finish rolling, and prepared finish rolling roll bending on line, wherein, the thickness of finish rolling roll bending is 3.5mm；
Step 8, for the second time longitudinal shearing slitting, finish rolling roll bending finish rolling obtained are transported to little banding machine by row device for hoisting
On carry out second time longitudinal shearing slitting, and prepare a point bar roll bending；
Step 9, packaging are put in storage, are utilized baling press to pack a point bar roll bending obtained after second time longitudinal shearing slitting
Packaging.
Embodiment three: as shown in Figure 1 and Figure 2, the processing technique of a kind of strip steel, comprise the steps:
Step one, prepare raw material, choose the hot-rolled coil that the trade mark is SCM435, wherein, the change of the hot-rolled coil of SCM435
The requirement studying part is: C:0.33 to 0.38, Si:0.15 to 0.35, Mn:0.60 to 0.90, P:0.030, S:0.030,
Cr:0.90 to 1.20, Ni:0.25, Mo:0.15 to 0.30；The requirement of the mechanical property of the hot-rolled coil of SCM435 is: tension
Intensity: 1000MPa；The requirement of the metallographic of the hot-rolled coil of SCM435 is: ferrite+pearlitic structrure, decarburized layer, works as thickness
>5mm, it is allowed to decarburization 1%t, wherein t is the thickness of hot rolled steel plate, as thickness 5mm, it is allowed to decarburization<50 μm, banded structure<
2 grades, field trash be carefully < 2 grades, in the present embodiment, the thickness choosing the hot-rolled coil that the trade mark is SCM435 is 3mm to 8.0mm,
Preferably 5mm to 6mm；
Step 2, for the first time longitudinal shearing slitting, the hot-rolled coil got ready in step one is transported to first by row device for hoisting
Carry out longitudinal shearing slitting for the first time, for convenience subsequent handling processing on big splitting production line, hot-rolled coil when slitting, width side
To the surplus of reserved about 0.5mm, the thickness tolerance of hot-rolled coil should meet the regulation of GB/T709, and convexity requires: thickness
Less than or equal to 3.0mm, convexity is less than or equal to 40 μm；Thickness is 3mm to 8.0mm, and convexity is less than or equal to 60 μm, and thickness is more than
8.0mm, convexity is less than or equal to 100 μm, and must not there be bubble, crackle in hot-rolled coil surface, scab, stick up skin, drawing crack and be mingled with, hot rolling
Roll bending must not have layering, and surface allows the deep pit of the slight pit within thickness deviation scope half and local, minute bubbles, light
Micro-scuffing and roll impression；Hot-rolled coil neat in edge, without zigzag, and when slitting blade datum end face beat should be little
In equal to 0.06mm；
Step 3, soft annealing, the hot-rolled coil completing for the first time longitudinal shearing slitting is transported to annealing by row device for hoisting
In stove/ammonia destruction furnace, first, annealing furnace is warming up to 400 DEG C at full speed, and after being warming up to 400 DEG C, is incubated 2.4h, secondly, move back
After stove is incubated 2.4h at a temperature of 400 DEG C, annealing furnace is warming up in 3.4h 600 DEG C, and protects after being warming up to 600 DEG C
Temperature 1.2h, again, after annealing furnace is incubated 1.2h at a temperature of 600 DEG C, is warming up to 690 DEG C in 2.4h by annealing furnace, and
1.2h it is incubated after being warming up to 690 DEG C, the 4th, after annealing furnace is incubated 1.2h at a temperature of 690 DEG C, annealing furnace is risen in 2.4h
Temperature is to 710 DEG C to 730 DEG C, and is incubated 15.6h after being warming up to 710 DEG C to 730 DEG C, and the 5th, annealing furnace is at 710 DEG C to 730 DEG C
At a temperature of be incubated after 15.6h, use the mode of furnace cooling that annealing furnace is cooled down 6.4h, the 6th, using furnace cooling
After mode is to annealing furnace cooling 6.4h, annealing furnace is changed cover air-cooled, and the temperature of annealing furnace is down to 280 DEG C, the 7th, move back
After the temperature of stove is down to 280 DEG C, uses the mode of water-cooled, the temperature of annealing furnace be down to 80 DEG C by 280 DEG C, finally, come out of the stove,
Prepare soft annealing roll bending；
Step 4, pickling, the soft annealing roll bending that soft annealing obtained are transported to pickling lines by row device for hoisting
On carry out pickling, and prepared pickling roll bending；
Step 5, rolling, it is transported on production line of rolling mill carry out by row device for hoisting by the pickling roll bending obtained after pickling
Rolling, and prepare rolling roll bending, wherein, the thickness after roll bending rolling is 4mm；
Step 6, spheroidizing, the rolling roll bending that obtains will be transported to annealing furnace/ammonolysis craft by row device for hoisting after rolling
Carry out spheroidizing in stove, first, annealing furnace is warming up to 400 DEG C at full speed, and after being warming up to 400 DEG C, be incubated 2.4h, secondly,
After annealing furnace is incubated 2.4h at a temperature of 400 DEG C, annealing furnace is warming up in 3.2h 640 DEG C, and after being warming up to 640 DEG C
Insulation 1.2h, again, after annealing furnace is incubated 1.2h at a temperature of 640 DEG C, is warming up to 730 DEG C in 2.4h by annealing furnace, and
1.2h it is incubated after being warming up to 730 DEG C, the 4th, after annealing furnace is incubated 1.2h at a temperature of 730 DEG C, by annealing furnace in 1.2h
It is warming up to 740 DEG C to 760 DEG C, and after being warming up to 740 DEG C to 760 DEG C, is incubated 14h, the 5th, annealing furnace is at 740 DEG C to 760 DEG C
At a temperature of be incubated after 14h, use the mode of furnace cooling that the temperature of annealing furnace is down to 550 DEG C to 600 DEG C, the 6th, adopting
After the temperature of annealing furnace being down to 550 DEG C to 600 DEG C by the mode of furnace cooling, annealing furnace is changed cover air-cooled, and will move back
The temperature of stove is down to 280 DEG C, and the 7th, after the temperature of annealing furnace is down to 280 DEG C, use the mode of water-cooled, by the temperature of annealing furnace
Degree is down to 80 DEG C by 280 DEG C, finally, comes out of the stove, and prepares spheroidizing roll bending；
Step 7, finish rolling, it is transported to roll production by row device for hoisting by the spheroidizing roll bending obtained after spheroidizing
Carrying out finish rolling, and prepared finish rolling roll bending on line, wherein, the thickness of finish rolling roll bending is 3.5mm；
Step 8, for the second time longitudinal shearing slitting, finish rolling roll bending finish rolling obtained are transported to little banding machine by row device for hoisting
On carry out second time longitudinal shearing slitting, and prepare a point bar roll bending；
Step 9, packaging are put in storage, are utilized baling press to pack a point bar roll bending obtained after second time longitudinal shearing slitting
Packaging.
Embodiment four: as shown in Figure 1 and Figure 2, the processing technique of a kind of strip steel, comprise the steps:
Step one, prepare raw material, choose the hot-rolled coil that the trade mark is SCM435, wherein, the change of the hot-rolled coil of SCM435
The requirement studying part is: C:0.33 to 0.38, Si:0.15 to 0.35, Mn:0.60 to 0.90, P:0.030, S:0.030,
Cr:0.90 to 1.20, Ni:0.25, Mo:0.15 to 0.30；The requirement of the mechanical property of the hot-rolled coil of SCM435 is: tension
Intensity: 1000MPa；The requirement of the metallographic of the hot-rolled coil of SCM435 is: ferrite+pearlitic structrure, decarburized layer, works as thickness
>5mm, it is allowed to decarburization 1%t, wherein t is the thickness of hot rolled steel plate, as thickness 5mm, it is allowed to decarburization<50 μm, banded structure<
2 grades, field trash be carefully < 2 grades, in the present embodiment, the thickness choosing the hot-rolled coil that the trade mark is SCM435 is 3mm to 8.0mm,
Preferably 5mm to 6mm；
Step 2, for the first time longitudinal shearing slitting, the hot-rolled coil got ready in step one is transported to first by row device for hoisting
Carry out longitudinal shearing slitting for the first time, for convenience subsequent handling processing on big splitting production line, hot-rolled coil when slitting, width side
To the surplus of reserved about 0.5mm, the thickness tolerance of hot-rolled coil should meet the regulation of GB/T709, and convexity requires: thickness
Less than or equal to 3.0mm, convexity is less than or equal to 40 μm；Thickness is 3mm to 8.0mm, and convexity is less than or equal to 60 μm, and thickness is more than
8.0mm, convexity is less than or equal to 100 μm, and must not there be bubble, crackle in hot-rolled coil surface, scab, stick up skin, drawing crack and be mingled with, hot rolling
Roll bending must not have layering, and surface allows the deep pit of the slight pit within thickness deviation scope half and local, minute bubbles, light
Micro-scuffing and roll impression；Hot-rolled coil neat in edge, without zigzag, and when slitting blade datum end face beat should be little
In equal to 0.06mm；
Step 3, soft annealing, the hot-rolled coil completing for the first time longitudinal shearing slitting is transported to annealing by row device for hoisting
In stove/ammonia destruction furnace, first, annealing furnace is warming up to 400 DEG C at full speed, and after being warming up to 400 DEG C, is incubated 5h, secondly, anneal
After stove is incubated 5h at a temperature of 400 DEG C, annealing furnace is warming up in 6h 600 DEG C, and after being warming up to 600 DEG C, is incubated 4h,
Again, after annealing furnace is incubated 4h at a temperature of 600 DEG C, annealing furnace is warming up in 5h 690 DEG C, and is being warming up to 690 DEG C
Rear insulation 4h, the 4th, after annealing furnace is incubated 4h at a temperature of 690 DEG C, annealing furnace is warming up in 5h 710 DEG C to 730 DEG C,
And after being warming up to 710 DEG C to 730 DEG C, it is incubated 18h, the 5th, after annealing furnace is incubated 18h at a temperature of 710 DEG C to 730 DEG C, adopt
By the mode of furnace cooling, annealing furnace is cooled down 7.2h, the 6th, use furnace cooling mode to annealing furnace cooling 7.2h after,
Annealing furnace is changed cover air-cooled, and the temperature of annealing furnace is down to 280 DEG C, the 7th, after the temperature of annealing furnace is down to 280 DEG C,
Use the mode of water-cooled, the temperature of annealing furnace is down to 80 DEG C by 280 DEG C, finally, come out of the stove, prepare soft annealing roll bending；
Step 4, pickling, the soft annealing roll bending that soft annealing obtained are transported to pickling lines by row device for hoisting
On carry out pickling, and prepared pickling roll bending；
Step 5, rolling, it is transported on production line of rolling mill carry out by row device for hoisting by the pickling roll bending obtained after pickling
Rolling, and prepare rolling roll bending, wherein, the thickness after roll bending rolling is 4mm；
Step 6, spheroidizing, the rolling roll bending that obtains will be transported to annealing furnace/ammonolysis craft by row device for hoisting after rolling
Carry out spheroidizing in stove, first, annealing furnace is warming up to 400 DEG C at full speed, and after being warming up to 400 DEG C, be incubated 5h, secondly, move back
After stove is incubated 5h at a temperature of 400 DEG C, annealing furnace is warming up in 6h 640 DEG C, and is incubated after being warming up to 640 DEG C
4h, again, after annealing furnace is incubated 4h at a temperature of 640 DEG C, is warming up to annealing furnace 730 DEG C in 4h, and is being warming up to 730
5h it is incubated after DEG C, the 4th, after annealing furnace is incubated 5h at a temperature of 730 DEG C, annealing furnace is warming up in 2h 740 DEG C to 760
DEG C, and after being warming up to 740 DEG C to 760 DEG C be incubated 16h, the 5th, annealing furnace at a temperature of 740 DEG C to 760 DEG C, be incubated 16h
After, use furnace cooling mode the temperature of annealing furnace is down to 550 DEG C to 600 DEG C, the 6th, use furnace cooling mode
After the temperature of annealing furnace is down to 550 DEG C to 600 DEG C, annealing furnace is changed cover air-cooled, and the temperature of annealing furnace is down to 280
DEG C, the 7th, after the temperature of annealing furnace is down to 280 DEG C, uses the mode of water-cooled, the temperature of annealing furnace is down to 80 DEG C by 280 DEG C,
Finally, come out of the stove, prepare spheroidizing roll bending；
Step 7, finish rolling, it is transported to roll production by row device for hoisting by the spheroidizing roll bending obtained after spheroidizing
Carrying out finish rolling, and prepared finish rolling roll bending on line, wherein, the thickness of finish rolling roll bending is 3.5mm；
Step 8, for the second time longitudinal shearing slitting, finish rolling roll bending finish rolling obtained are transported to little banding machine by row device for hoisting
On carry out second time longitudinal shearing slitting, and prepare a point bar roll bending；
Step 9, packaging are put in storage, are utilized baling press to pack a point bar roll bending obtained after second time longitudinal shearing slitting
Packaging.
Embodiment five: as shown in Figure 1 and Figure 2, the processing technique of a kind of strip steel, comprise the steps:
Step one, prepare raw material, choose the hot-rolled coil that the trade mark is SCM435, wherein, the change of the hot-rolled coil of SCM435
The requirement studying part is: C:0.33 to 0.38, Si:0.15 to 0.35, Mn:0.60 to 0.90, P:0.030, S:0.030,
Cr:0.90 to 1.20, Ni:0.25, Mo:0.15 to 0.30；The requirement of the mechanical property of the hot-rolled coil of SCM435 is: tension
Intensity: 1000MPa；The requirement of the metallographic of the hot-rolled coil of SCM435 is: ferrite+pearlitic structrure, decarburized layer, works as thickness
>5mm, it is allowed to decarburization 1%t, wherein t is the thickness of hot rolled steel plate, as thickness 5mm, it is allowed to decarburization<50 μm, banded structure<
2 grades, field trash be carefully < 2 grades, in the present embodiment, the thickness choosing the hot-rolled coil that the trade mark is SCM435 is 3mm to 8.0mm,
Preferably 5mm to 6mm；
Step 2, for the first time longitudinal shearing slitting, the hot-rolled coil got ready in step one is transported to first by row device for hoisting
Carry out longitudinal shearing slitting for the first time, for convenience subsequent handling processing on big splitting production line, hot-rolled coil when slitting, width side
To the surplus of reserved about 0.5mm, the thickness tolerance of hot-rolled coil should meet the regulation of GB/T709, and convexity requires: thickness
Less than or equal to 3.0mm, convexity is less than or equal to 40 μm；Thickness is 3mm to 8.0mm, and convexity is less than or equal to 60 μm, and thickness is more than
8.0mm, convexity is less than or equal to 100 μm, and must not there be bubble, crackle in hot-rolled coil surface, scab, stick up skin, drawing crack and be mingled with, hot rolling
Roll bending must not have layering, and surface allows the deep pit of the slight pit within thickness deviation scope half and local, minute bubbles, light
Micro-scuffing and roll impression；Hot-rolled coil neat in edge, without zigzag, and when slitting blade datum end face beat should be little
In equal to 0.06mm；
Step 3, soft annealing, the hot-rolled coil completing for the first time longitudinal shearing slitting is transported to annealing by row device for hoisting
In stove/ammonia destruction furnace, first, annealing furnace is warming up to 400 DEG C at full speed, and after being warming up to 400 DEG C, is incubated 2h, secondly, anneal
After stove is incubated 2h at a temperature of 400 DEG C, annealing furnace is warming up in 3h 600 DEG C, and after being warming up to 600 DEG C, is incubated 1h,
Again, after annealing furnace is incubated 1h at a temperature of 600 DEG C, annealing furnace is warming up in 2h 690 DEG C, and is being warming up to 690 DEG C
Rear insulation 1h, the 4th, after annealing furnace is incubated 1h at a temperature of 690 DEG C, annealing furnace is warming up in 2h 710 DEG C to 730 DEG C,
And after being warming up to 710 DEG C to 730 DEG C, it is incubated 13h, the 5th, after annealing furnace is incubated 13h at a temperature of 710 DEG C to 730 DEG C, adopt
By the mode of furnace cooling, annealing furnace is cooled down 6h, the 6th, use furnace cooling mode to annealing furnace cooling 6h after, to moving back
It is air-cooled that stove carries out changing cover, and the temperature of annealing furnace is down to 280 DEG C, and the 7th, after the temperature of annealing furnace is down to 280 DEG C, use
The mode of water-cooled, is down to 80 DEG C by the temperature of annealing furnace by 280 DEG C, finally, comes out of the stove, and prepares soft annealing roll bending；
Step 4, pickling, the soft annealing roll bending that soft annealing obtained are transported to pickling lines by row device for hoisting
On carry out pickling, and prepared pickling roll bending；
Step 5, rolling, it is transported on production line of rolling mill carry out by row device for hoisting by the pickling roll bending obtained after pickling
Rolling, and prepare rolling roll bending, wherein, the thickness after roll bending rolling is 4mm；
Step 6, spheroidizing, the rolling roll bending that obtains will be transported to annealing furnace/ammonolysis craft by row device for hoisting after rolling
Carry out spheroidizing in stove, first, annealing furnace is warming up to 400 DEG C at full speed, and after being warming up to 400 DEG C, be incubated 2h, secondly, move back
After stove is incubated 2h at a temperature of 400 DEG C, annealing furnace is warming up in 3h 640 DEG C, and is incubated after being warming up to 640 DEG C
1h, again, after annealing furnace is incubated 1h at a temperature of 640 DEG C, is warming up to annealing furnace 730 DEG C in 2h, and is being warming up to 730
1h it is incubated after DEG C, the 4th, after annealing furnace is incubated 1h at a temperature of 730 DEG C, annealing furnace is warming up in 1h 740 DEG C to 760
DEG C, and after being warming up to 740 DEG C to 760 DEG C be incubated 12h, the 5th, annealing furnace at a temperature of 740 DEG C to 760 DEG C, be incubated 12h
After, use furnace cooling mode the temperature of annealing furnace is down to 550 DEG C to 600 DEG C, the 6th, use furnace cooling mode
After the temperature of annealing furnace is down to 550 DEG C to 600 DEG C, annealing furnace is changed cover air-cooled, and the temperature of annealing furnace is down to 280
DEG C, the 7th, after the temperature of annealing furnace is down to 280 DEG C, uses the mode of water-cooled, the temperature of annealing furnace is down to 80 DEG C by 280 DEG C,
Finally, come out of the stove, prepare spheroidizing roll bending；
Step 7, finish rolling, it is transported to roll production by row device for hoisting by the spheroidizing roll bending obtained after spheroidizing
Carrying out finish rolling, and prepared finish rolling roll bending on line, wherein, the thickness of finish rolling roll bending is 3.5mm；
Step 8, for the second time longitudinal shearing slitting, finish rolling roll bending finish rolling obtained are transported to little banding machine by row device for hoisting
On carry out second time longitudinal shearing slitting, and prepare a point bar roll bending；
Step 9, packaging are put in storage, are utilized baling press to pack a point bar roll bending obtained after second time longitudinal shearing slitting
Packaging.
In the present invention, it is preferred to the technical scheme of embodiment five, according to the thickness of corresponding hot-rolled coil, formulate specific
Soft annealing, the operating process of spheroidizing, thus effectively control the stability of the product quality produced, and product
Performance, when the thickness of hot-rolled coil changes, soft annealing, the operating process of spheroidizing are also required to change.
In soft annealing, need to do detonation test before heating up, it is ensured that the purity of hydrogen in ammonia destruction furnace；At whole liter
In temperature and insulating process, actual temperature value is less than 15 DEG C with the difference of process warm angle value, and actual temperature value is recorded by thermocouple, inspection
The frequency surveyed is 1 time/1h, additionally, can suitably increase insulation platform in temperature-rise period, with satisfied theoretical raising speed.
In spheroidizing, need to do detonation test before heating up, it is ensured that the purity of hydrogen in ammonia destruction furnace；At whole liter
In temperature and insulating process, actual temperature value is less than 15 DEG C with the difference of process warm angle value, and actual temperature value is recorded by thermocouple, inspection
The frequency surveyed is 1 time/1h, additionally, can suitably increase insulation platform in temperature-rise period, with satisfied theoretical raising speed.
Strip steel, in whole production technology, needs to carry out twice detection, the most once before carrying out pickling, is shown by metallographic
The Oxygen potential of soft annealing roll bending is detected by micro mirror, and puts into pickling lines by detecting qualified soft annealing roll bending
On, wherein judge the standard foundation JB/T 5074-2007 standard component that soft annealing roll bending is the most qualified during Oxygen potential detection
In, 5 grades or 6 grades of medium carbon structural alloy steel nodularization body classification；The most once before carrying out second time longitudinal shearing slitting, by omnipotent
The hardness of finish rolling roll bending is detected by testing machine and durometer, and the acceptability limit of the hardness number of finish rolling roll bending is 75HRB
To 85HRB；The finish rolling roll bending that hardness number is qualified is carried out metallographic detection, the metallographic the most qualified finish rolling roll bending of detection is put into little
On banding machine, metallographic detection is with reference to the regulation of JB/T5074 to 2007, wherein with reference to shown in Fig. 3.
Antirust oil on bar roll bending need to divided when carrying out second time longitudinal shearing slitting；When carrying out the second longitudinal shearing slitting, hot rolling
Must not there be bubble, crackle in roll bending surface, scab, stick up skin, drawing crack and be mingled with, and hot-rolled coil must not have layering, and surface has allowed thickness
The deep pit of slight pit and local, minute bubbles, slight scuffing and roll impression within degree margin of tolerance half；Hot rolled coil edges of boards
Edge is neat, without zigzag, and blade datum end face is beated and is less than or equal to 0.06mm.
The rolling roll bending surface obtained when rolling is without sticking up skin, pit, pit, yellow rust, scale, scuffing, template
Straight；Edge: without plucking, broken limit.The surface of point bar roll bending that longitudinal shearing slitting obtains is without sticking up skin, pit, pit, water for the second time
Rust, scratch, yellow rust, impressing, plate shape is straight, edge is without broken limit；Need on point bar roll bending when carrying out second time longitudinal shearing slitting
Antirust oil.
Although above it has been shown and described that embodiments of the invention, it is to be understood that above-described embodiment is example
Property, it is impossible to being interpreted as limitation of the present invention, those of ordinary skill in the art within the scope of the invention can be to above-mentioned
Embodiment is changed, revises, replaces and modification.
Claims (10)
1. the processing technique of a strip steel, it is characterised in that comprise the steps:
Step one, prepare raw material, choose the hot-rolled coil that the trade mark is SCM435；
Step 2, for the first time longitudinal shearing slitting, that by row device for hoisting, the hot-rolled coil got ready in step one is transported to first is the most vertical
Cut and on production line, carry out longitudinal shearing slitting for the first time；
Step 3, soft annealing, the hot-rolled coil completing for the first time longitudinal shearing slitting is transported to annealing furnace/ammonia by row device for hoisting
Secondly, annealing furnace in dore furnace, first, annealing furnace is at full speed warming up to 400 DEG C, and after being warming up to 400 DEG C, is incubated 1h to 5h,
After being incubated 1h to 5h at a temperature of 400 DEG C, annealing furnace is warming up in 1h to 6h 600 DEG C, and protects after being warming up to 600 DEG C
Temperature 0.5h to 4h, again, after annealing furnace is incubated 0.5h to 4h at a temperature of 600 DEG C, is warming up to annealing furnace in 1h to 5h
690 DEG C, and after being warming up to 690 DEG C, be incubated 0.5h to 4h, the 4th, after annealing furnace is incubated 0.5h to 4h at a temperature of 690 DEG C,
Annealing furnace is warming up in 1h to 5h 710 DEG C to 730 DEG C, and after being warming up to 710 DEG C to 730 DEG C, is incubated 10h to 18h, the
Five, after annealing furnace is incubated 10h to 18h at a temperature of 710 DEG C to 730 DEG C, the mode of furnace cooling is used to be cooled down by annealing furnace
4h to 8h, the 6th, use furnace cooling mode to annealing furnace cooling 4h to 8h after, annealing furnace is changed cover air-cooled, and
The temperature of annealing furnace is down to 280 DEG C, the 7th, after the temperature of annealing furnace is down to 280 DEG C, use the mode of water-cooled, by annealing furnace
Temperature be down to 80 DEG C by 280 DEG C, last, come out of the stove, prepare soft annealing roll bending；
Step 4, pickling, that the soft annealing roll bending that soft annealing obtained is transported to pickling lines by row device for hoisting is enterprising
Row pickling, and prepared pickling roll bending；
Step 5, rolling, it is transported on production line of rolling mill roll by row device for hoisting by the pickling roll bending obtained after pickling,
And prepare rolling roll bending；
Step 6, spheroidizing, the rolling roll bending that obtains will be transported in annealing furnace/ammonia destruction furnace by row device for hoisting after rolling
Carry out spheroidizing, first, annealing furnace is warming up to 400 DEG C at full speed, and after being warming up to 400 DEG C, be incubated 1h to 5h, secondly, move back
After stove is incubated 1h to 5h at a temperature of 400 DEG C, annealing furnace is warming up in 1h to 6h 640 DEG C, and is being warming up to 640 DEG C
Rear insulation 0.5h to 4h, again, after annealing furnace is incubated 0.5h to 4h at a temperature of 640 DEG C, rises annealing furnace in 1h to 5h
Temperature to 730 DEG C, and after being warming up to 730 DEG C be incubated 0.5h to 4h, the 4th, annealing furnace at a temperature of 730 DEG C, be incubated 0.5h extremely
After 4h, annealing furnace is warming up in 0.5h to 2h 740 DEG C to 760 DEG C, and is incubated 10h extremely after being warming up to 740 DEG C to 760 DEG C
16h, the 5th, after annealing furnace is incubated 10h to 16h at a temperature of 740 DEG C to 760 DEG C, the mode using furnace cooling will annealing
The temperature of stove is down to 550 DEG C to 600 DEG C, the 6th, use furnace cooling mode the temperature of annealing furnace is down to 550 DEG C extremely
After 600 DEG C, annealing furnace is changed cover air-cooled, and the temperature of annealing furnace is down to 280 DEG C, the 7th, the temperature of annealing furnace is down to
After 280 DEG C, use the mode of water-cooled, the temperature of annealing furnace is down to 80 DEG C by 280 DEG C, finally, come out of the stove, prepare spheroidizing volume
Plate；
Step 7, finish rolling, it is transported to roll on production line by row device for hoisting by the spheroidizing roll bending obtained after spheroidizing
Carry out finish rolling, and prepared finish rolling roll bending；
Step 8, for the second time longitudinal shearing slitting, that finish rolling roll bending finish rolling obtained is transported to little banding machine by row device for hoisting is enterprising
Row second time longitudinal shearing slitting, and prepare a point bar roll bending；
Step 9, packaging are put in storage, are utilized baling press that a point bar roll bending obtained after second time longitudinal shearing slitting is carried out packing packaging.
The processing technique of a kind of strip steel the most according to claim 1, it is characterised in that in described step 3, move back in softening
During fire, annealing furnace is warming up to 400 DEG C at full speed, and after being warming up to 400 DEG C, is incubated 1.5h to 3h；Annealing furnace is the temperature of 400 DEG C
After the lower insulation 1.5h to 3h of degree, annealing furnace is warming up in 2h to 4h 600 DEG C, and is incubated 0.6h extremely after being warming up to 600 DEG C
2h；After annealing furnace is incubated 0.6h to 2h at a temperature of 600 DEG C, annealing furnace is warming up in 1.5h to 3h 690 DEG C, and is rising
Temperature is incubated 0.6h to 2h after 690 DEG C；After annealing furnace is incubated 0.6h to 2h at a temperature of 690 DEG C, by annealing furnace at 1.5h extremely
It is warming up to 710 DEG C to 730 DEG C in 3h, and after being warming up to 710 DEG C to 730 DEG C, is incubated 11h to 16h；Annealing furnace is at 710 DEG C extremely
After being incubated 11h to 16h at a temperature of 730 DEG C, use the mode of furnace cooling that annealing furnace is cooled down 4.5h to 7.2h.
The processing technique of a kind of strip steel the most according to claim 2, it is characterised in that when soft annealing, by annealing furnace
It is warming up to 400 DEG C at full speed, and after being warming up to 400 DEG C, is incubated 1.8h to 2.4h；Annealing furnace is incubated 1.8h at a temperature of 400 DEG C
To 2.4h, annealing furnace is warming up in 2.8h to 3.4h 600 DEG C, and after being warming up to 600 DEG C, is incubated 0.8h to 1.2h；Move back
After stove is incubated 0.8h to 1.2h at a temperature of 600 DEG C, annealing furnace is warming up in 1.8h to 2.4h 690 DEG C, and is rising
Temperature is incubated 0.8h to 1.2h after 690 DEG C；After annealing furnace is incubated 0.8h to 1.2h at a temperature of 690 DEG C, annealing furnace is existed
It is warming up to 710 DEG C to 730 DEG C in 1.8h to 2.4h, and after being warming up to 710 DEG C to 730 DEG C, is incubated 11.2h to 15.6h；Annealing
After stove is incubated 11.2h to 15.6h at a temperature of 710 DEG C to 730 DEG C, use the mode of furnace cooling that annealing furnace is cooled down 5.2h
To 6.4h.
4. according to the processing technique of described a kind of strip steel arbitrary in claim 1 to 2, it is characterised in that in soft annealing,
Need before heating up to do detonation test, it is ensured that the purity of hydrogen in ammonia destruction furnace；In whole intensification and insulating process, actual temperature
Angle value is less than 15 DEG C with the difference of process warm angle value.
The processing technique of a kind of strip steel the most according to claim 1, it is characterised in that in described step 4, is carrying out acid
Before washing, first with metallurgical microscope, the Oxygen potential of soft annealing roll bending need to be detected, and by soft annealing qualified for detection
Roll bending is put on pickling lines.
The processing technique of a kind of strip steel the most according to claim 1, it is characterised in that carrying out pickling in described step 6
Time, the minus tolerance of the thickness before and after soft annealing roll bending pickling is less than 0.15mm, and the quantity of descaling bath is two, the quantity of deactivation slot
Being one, the quantity of neutralization chamber is one, and the pickling concentration of two descaling baths is respectively 18% to 22%, 15% to 18%, two
Sour position in individual descaling bath is 380mm to 420mm, and acid liquor temperature is 53 DEG C to 72 DEG C, and the pH value of neutralization chamber is 11 to 13, passivation
The pH value of groove is 7 to 8, and the temperature value of deactivation slot is 38 DEG C to 51 DEG C, and the cleaning speed of pickling lines is 5m/min to 15m/
min。
The processing technique of a kind of strip steel the most according to claim 1, it is characterised in that in described step 3, move back in nodularization
During fire, annealing furnace is warming up to 400 DEG C at full speed, and after being warming up to 400 DEG C, is incubated 1.5h to 3h；Annealing furnace is the temperature of 400 DEG C
After the lower insulation 1.5h to 3h of degree, annealing furnace is warming up in 2h to 4h 640 DEG C, and is incubated 0.6h extremely after being warming up to 640 DEG C
2h；After annealing furnace is incubated 0.6h to 2h at a temperature of 640 DEG C, annealing furnace is warming up in 1.5h to 3h 730 DEG C, and is rising
Temperature is incubated 0.6h to 2h after 730 DEG C；After annealing furnace is incubated 0.6h to 2h at a temperature of 730 DEG C, by annealing furnace at 0.5h extremely
It is warming up to 740 DEG C to 760 DEG C in 1.8h, and after being warming up to 740 DEG C to 760 DEG C, is incubated 11h to 14h.
The processing technique of a kind of strip steel the most according to claim 7, it is characterised in that when spheroidizing, by annealing furnace
It is warming up to 400 DEG C at full speed, and after being warming up to 400 DEG C, is incubated 1.8h to 2.4h；Annealing furnace is incubated 1.8h at a temperature of 400 DEG C
To 2.4h, annealing furnace is warming up in 2.5h to 3.2h 640 DEG C, and after being warming up to 640 DEG C, is incubated 0.6h to 1.2h；Move back
After stove is incubated 0.6h to 1.2h at a temperature of 640 DEG C, annealing furnace is warming up in 1.8h to 2.4h 730 DEG C, and is rising
Temperature is incubated 0.6h to 1.2h after 730 DEG C；After annealing furnace is incubated 0.6h to 1.2h at a temperature of 730 DEG C, annealing furnace is existed
It is warming up to 740 DEG C to 760 DEG C in 0.6h to 1.2h, and after being warming up to 740 DEG C to 760 DEG C, is incubated 12h to 13.5h.
9. according to the processing technique of a kind of strip steel described in claim 1 or 7 or 8, it is characterised in that in spheroidizing, entering
Row needs before heating up to do detonation test, it is ensured that the purity of hydrogen in ammonia destruction furnace；In whole intensification and insulating process, actual temperature
Value is less than 15 DEG C with the difference of process warm angle value.
The processing technique of a kind of strip steel the most according to claim 1, it is characterised in that in described step 8, is carrying out
Before secondary longitudinal shearing slitting, first with universal testing machine and durometer, the hardness of finish rolling roll bending need to be detected, and finish rolling volume
The acceptability limit of the hardness number of plate is 75HRB to 85HRB；The finish rolling roll bending that hardness number is qualified is carried out metallographic detection, by metallographic
Detect the most qualified finish rolling roll bending to put on little banding machine.
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| CN201810020573.9A CN108220548B (en) | 2016-08-29 | 2016-08-29 | A kind of processing technology of high-strength steel strip |
| CN201810020575.8A CN108239693B (en) | 2016-08-29 | 2016-08-29 | Processing technology of stable strip steel |
| CN201610755057.1A CN106086350B (en) | 2016-08-29 | 2016-08-29 | A kind of processing technology of strip |
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| CN201810020582.8A Division CN108251610B (en) | 2016-08-29 | 2016-08-29 | Hot rolling processing technology of strip steel |
| CN201810020573.9A Division CN108220548B (en) | 2016-08-29 | 2016-08-29 | A kind of processing technology of high-strength steel strip |
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Also Published As
| Publication number | Publication date |
|---|---|
| CN108165709B (en) | 2019-12-27 |
| CN108220548A (en) | 2018-06-29 |
| CN108251610B (en) | 2020-02-18 |
| CN108193028A (en) | 2018-06-22 |
| CN108193028B (en) | 2020-07-03 |
| CN108251610A (en) | 2018-07-06 |
| CN108239693A (en) | 2018-07-03 |
| CN108239693B (en) | 2019-12-27 |
| CN106086350B (en) | 2018-02-16 |
| CN108165709A (en) | 2018-06-15 |
| CN108220548B (en) | 2019-10-15 |
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