CN109518197A - A kind of production technology of hot rolling anacidity pickling low carbon steel plate - Google Patents
A kind of production technology of hot rolling anacidity pickling low carbon steel plate Download PDFInfo
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- CN109518197A CN109518197A CN201811265986.XA CN201811265986A CN109518197A CN 109518197 A CN109518197 A CN 109518197A CN 201811265986 A CN201811265986 A CN 201811265986A CN 109518197 A CN109518197 A CN 109518197A
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- Prior art keywords
- steel plate
- low carbon
- carbon steel
- production technology
- mortar
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Classifications
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- 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
- B24—GRINDING; POLISHING
- B24C—ABRASIVE OR RELATED BLASTING WITH PARTICULATE MATERIAL
- B24C1/00—Methods for use of abrasive blasting for producing particular effects; Use of auxiliary equipment in connection with such methods
- B24C1/08—Methods for use of abrasive blasting for producing particular effects; Use of auxiliary equipment in connection with such methods for polishing surfaces, e.g. smoothing a surface by making use of liquid-borne abrasives
- B24C1/086—Descaling; Removing coating films
Abstract
The present invention relates to a kind of production technology of hot rolling anacidity pickling low carbon steel plate, production technology and acid cleaning process including low carbon steel plate, which is characterized in that the acid cleaning process includes: to the uncoiling of steel plate after smooth, mechanical lapping pickling, mortar pickling, curling process；The mortar pickling includes the following steps: water and grit being mixed into mortar, be cast mortar to the surface of low carbon steel plate by impeller head, the projectile direction of mortar and the angle of low carbon steel plate are 0-45 °.By the way of purely mechanic physics rather than the mode of chemistry cleans, and non-pollution discharge makes operating procedure environmental sound.
Description
Technical field
The present invention relates to Plate Production technology fields, and in particular to a kind of production of hot rolling anacidity pickling low carbon steel plate
Technique.
Background technique
Hot rolling acid-cleaning steel plate is handled after hot rolling by pickling unit on continuous hot-rolling mill, surface quality and usability
Can intermediate products between hot rolled plate and cold-reduced sheet, be the ideal substitute of part hot rolled steel plate and cold-rolled steel sheet.Due to
The surface quality of hot rolling acid-cleaning steel plate is better than hot rolled steel plate, and production cost is lower than cold-rolled steel sheet, therefore is iron and steel enterprise's profit ratio
One of abundanter product.For hot rolled steel plate after finish to gauge is batched, surface can generate one layer of hard and crisp iron scale, be commonly called as squama
Skin.Hot rolled steel plate is either used as raw material to enter before cold rolling still carries out coating, it is necessary to removed it is clean, in metallurgical industry
Kind is also referred to as de-scaling.The surface clean of traditional metal product, the most common mode of de-scaling are chemical methodes, that is, pass through pickling
The mode of unit pickling.However it is being advocated energetically under green, environment-friendly type metallurgical production target at present, the pickling of chemical mode
Descaling process becomes very uncoordinated with its typical disposal of pollutants, severe production environment.
Summary of the invention
It is above-mentioned existing to overcome it is an object of the present invention to provide a kind of production technology of hot rolling anacidity pickling low carbon steel plate
The defect of technology.
In order to achieve the above object, technical solution of the present invention is achieved by the following procedure:
A kind of production technology of hot rolling anacidity pickling low carbon steel plate, production technology and acid cleaning process including low carbon steel plate,
Specifically, the acid cleaning process includes: to the uncoiling of steel plate after smooth, mechanical lapping pickling, mortar pickling, curling process.
The production technology of the low carbon steel plate includes molten iron pretreatment, converter smelting, external refining, sheet billet continuous casting, stepping
Formula heats stove heating, rolling, laminar cooling water cooling, curling and smooth.
The mortar pickling includes the following steps: water and grit being mixed into mortar, by impeller head by mortar cast to
The surface of low carbon steel plate, the projectile direction of mortar and the angle of low carbon steel plate are 0-45 °.
Preferably, cast region transverse width be greater than low carbon steel plate maximum width one of the mortar in low carbon steel plate
Half.
Preferably, the rolling direction of the low carbon steel plate is equipped with multiple impeller heads, each impeller head corresponds to different
Cast region.
Preferably, the ejection velocity of the multiple impeller head is gradually reduced along rolling direction, it is husky in used mortar
The grain graininess liquid of gravel sequentially reduces.
Preferably, it further includes rinsing process that in the rolling direction the last one, which casts region: passing through spray using clear water
Shower pipe cleans low carbon steel plate, is then dried by drying machine, improves the antirust ability of low carbon steel plate.
Preferably, after rinsing process, low carbon steel plate is imaged, judges scale removal effect, in favor of to integrated artistic into
Row closed-loop control increases or decreases surface treatment linear velocity.
As a preferred embodiment, the mechanical lapping pickling includes the following steps: 20-40 DEG C of water and partial size 3-
The grit of 10mm after evenly mixing in Injection Level oscillator, shake 130-170 seconds by level.Make the surface scale of low carbon steel plate
It partly peels off, in favor of improving the pickling effect of mortar acid pickling step.
As a preferred embodiment, the mechanical lapping pickling includes the following steps: 20-40 DEG C of water and partial size 1-
The grit of 5mm injects in vertical oscialltor after evenly mixing, vertical concussion 80-120 seconds.Make the surface oxidation skin zone of low carbon steel plate
Ground is divided to peel off, in favor of improving the pickling effect of mortar acid pickling step.
As a preferred embodiment, the mechanical lapping pickling includes the following steps: 20-40 DEG C of water and partial size 1-
The grit of 5mm is injected separately into horizontal oscillator tube and vertical oscialltor after evenly mixing, first vertical concussion 15-30 seconds, then
Level concussion processing 20-60 seconds.Peel off the surface scale of low carbon steel plate partly, in favor of improving mortar acid pickling step
Pickling effect.
Further include correction process before the acid cleaning process: low carbon steel plate being stretched and is bent by roller drawing and straightening machine is strong
Directly.The template that can not only improve hot-rolled mild steel sheet is done so, and subsequent scale removal effect can be effectively improved, guarantees plate face matter
Amount.
It further include following steps: by roller straightener to low-carbon after the uncoiling of steel plate after smooth in the acid cleaning process
Steel plate is aligned, and is made steel plate convenient for threading, is improved operating efficiency.
Specifically, the production technology of the low carbon steel plate are as follows: 1700mm milling train is used, with the plate with a thickness of 140-240mm
Base produces with a thickness of 1-5mm, width 800-1500mm.
Production technology provided by the invention can reach it is following the utility model has the advantages that
1, due to avoiding using corrosive liquids such as acid solutions, the production technology of the present embodiment 1 does not need to float steel plate
The technical process washed and dried shortens process cycle.
2, by the way that water to be forced into certain pressure, the tiny grit of corner angle provided with sand supplying system is efficiently mixed, and is formed
High energy mortar stream, throws at a high speed the upper and lower surface of low carbon steel plate, will by the strike, erosion and abrasive action of high speed mortar stream
The removings such as iron scale, the impurity of low carbon steel plate are clean, to achieve the purpose that cleaning, de-scaling.
3, due to by the way of purely mechanic physics rather than chemistry mode clean, non-pollution discharge.Compact life
Production. art and the process length significantly shortened simplify producing line, reduce production cost.
4, the Hydrogen Brittleness Phenomena that the acid cleaning process of chemistry generates is overcome, will not generate performance to surface and substrate influences.
5, acid cleaning process can flexibly control the influence such as time, speed, convenient for control, not will cause overpickling, parking spot etc.
Phenomenon.
Specific embodiment
The present invention will be described in detail combined with specific embodiments below.
Embodiment 1
A kind of production technology of hot rolling anacidity pickling low carbon steel plate, production technology and acid cleaning process including low carbon steel plate,
Specifically, the acid cleaning process includes: to the uncoiling of steel plate after smooth, mechanical lapping pickling, mortar pickling, curling process.
The production technology of the low carbon steel plate includes molten iron pretreatment, converter smelting, external refining, sheet billet continuous casting, stepping
Formula heats stove heating, rolling, laminar cooling water cooling, curling and smooth.
The mortar pickling includes the following steps: water and grit being mixed into mortar, by impeller head by mortar cast to
The surface of low carbon steel plate, the projectile direction of mortar and the angle of low carbon steel plate are 0-45 °.
Preferably, cast region transverse width be greater than low carbon steel plate maximum width one of the mortar in low carbon steel plate
Half.
Preferably, the rolling direction of the low carbon steel plate is equipped with multiple impeller heads, each impeller head corresponds to different
Cast region.
Preferably, the ejection velocity of the multiple impeller head is gradually reduced along rolling direction, it is husky in used mortar
The grain graininess liquid of gravel sequentially reduces.
Preferably, it further includes rinsing process that in the rolling direction the last one, which casts region: passing through spray using clear water
Shower pipe cleans low carbon steel plate, is then dried by drying machine, improves the antirust ability of low carbon steel plate.
Preferably, after rinsing process, low carbon steel plate is imaged, judges scale removal effect, in favor of to integrated artistic into
Row closed-loop control increases or decreases surface treatment linear velocity.
As a preferred embodiment, the mechanical lapping pickling includes the following steps: 20-40 DEG C of water and partial size 3-
The grit of 10mm after evenly mixing in Injection Level oscillator, shake 130-170 seconds by level.Make the surface scale of low carbon steel plate
It partly peels off, in favor of improving the pickling effect of mortar acid pickling step.
As a preferred embodiment, the mechanical lapping pickling includes the following steps: 20-40 DEG C of water and partial size 1-
The grit of 5mm injects in vertical oscialltor after evenly mixing, vertical concussion 80-120 seconds.Make the surface oxidation skin zone of low carbon steel plate
Ground is divided to peel off, in favor of improving the pickling effect of mortar acid pickling step.
As a preferred embodiment, the mechanical lapping pickling includes the following steps: 20-40 DEG C of water and partial size 1-
The grit of 5mm is injected separately into horizontal oscillator tube and vertical oscialltor after evenly mixing, first vertical concussion 15-30 seconds, then
Level concussion processing 20-60 seconds.Peel off the surface scale of low carbon steel plate partly, in favor of improving mortar acid pickling step
Pickling effect.
Further include correction process before the acid cleaning process: low carbon steel plate being stretched and is bent by roller drawing and straightening machine is strong
Directly.The template that can not only improve hot-rolled mild steel sheet is done so, and subsequent scale removal effect can be effectively improved, guarantees plate face matter
Amount.
It further include following steps: by roller straightener to low-carbon after the uncoiling of steel plate after smooth in the acid cleaning process
Steel plate is aligned, and is made steel plate convenient for threading, is improved operating efficiency.
Specifically, the production technology of the low carbon steel plate are as follows: 1700mm milling train is used, with the plate with a thickness of 140-240mm
Base produces with a thickness of 1-5mm, width 800-1500mm.
The production technology that embodiment 1 provides can reach it is following the utility model has the advantages that
1, due to avoiding using corrosive liquids such as acid solutions, the production technology of the present embodiment 1 does not need to float steel plate
The technical process washed and dried shortens process cycle.
2, by the way that water to be forced into certain pressure, the tiny grit of corner angle provided with sand supplying system is efficiently mixed, and is formed
High energy mortar stream, throws at a high speed the upper and lower surface of low carbon steel plate, will by the strike, erosion and abrasive action of high speed mortar stream
The removings such as iron scale, the impurity of low carbon steel plate are clean, to achieve the purpose that cleaning, de-scaling.
3, due to by the way of purely mechanic physics rather than chemistry mode clean, non-pollution discharge.Compact life
Production. art and the process length significantly shortened simplify producing line, reduce production cost.
4, the Hydrogen Brittleness Phenomena that the acid cleaning process of chemistry generates is overcome, will not generate performance to surface and substrate influences.
5, acid cleaning process can flexibly control the influence such as time, speed, convenient for control, not will cause overpickling, parking spot etc.
Phenomenon.
Specifically, 1220 DEG C of heat preservation about 2h, subsequent hot, finishing temperature will be heated to a thickness of the continuous casting billet of 230mm
880-900℃；Steel plate, which goes out after mm finishing mill unit, is cooled to 660-690 DEG C of curling with the speed greater than 50 DEG C/s.
The chemical component of the steel plate includes following element according to mass fraction meter:
Mechanics Performance Testing is carried out to the head, middle part and tail portion of steel plate, test result is as follows shown in table:
Finished steel plate thickness 1.8mm.As seen from the above table, the good mechanical properties of steel plate, tensile strength are greater than 310MPa, bend
It takes intensity and is up to 200MPa or more, elongation after fracture is greater than 42%, Lankford r value 0.5-0.6, strain hardening exponent n value
0.19-0.21.Steel plate provided by the invention can be used for automotive field.Specifically, since the steel plate is without hot rolling iron scale, table
Face has metallic luster sense, and coating performance is good, can be used as automotive frame steel band.
Embodiment 2
A kind of production technology of hot rolling anacidity pickling low carbon steel plate, production technology and acid cleaning process including low carbon steel plate,
Specifically,
The production technology of the low carbon steel plate includes molten iron pretreatment, converter smelting, external refining, sheet billet continuous casting, stepping
Formula heats stove heating, rolling, laminar cooling water cooling, curling and smooth.
The acid cleaning process includes: to the uncoiling of steel plate after smooth, mechanical lapping pickling, mortar pickling, curling process.Institute
It states mortar pickling to include the following steps: water and grit being mixed into mortar, is cast mortar to low carbon steel plate by impeller head
Surface, the projectile direction of mortar and the angle of low carbon steel plate are 20 °.
The half that casts region transverse width be greater than low carbon steel plate maximum width of the mortar in low carbon steel plate.
The rolling direction of the low carbon steel plate is equipped with multiple impeller heads, and each impeller head corresponds to different projectile regions.
The ejection velocity of the multiple impeller head is gradually reduced along rolling direction, the particle of grit in used mortar
Degree sequentially reduces.
It further includes rinsing process that in the rolling direction the last one, which casts region: using clear water by spray tube to low-carbon
Steel plate is cleaned, and is then dried by drying machine, and the antirust ability of low carbon steel plate is improved.
After rinsing process, low carbon steel plate is imaged, judges scale removal effect, in favor of carrying out closed loop control to integrated artistic
System, increases or decreases surface treatment linear velocity.
The mechanical lapping pickling includes the following steps: with the grit of partial size 3-10mm uniformly to mix 20-40 DEG C of water
Afterwards in Injection Level oscillator, level concussion 130-170 seconds.Peel off the surface scale of low carbon steel plate partly, in favor of
Improve the pickling effect of mortar acid pickling step.In example 2, after evenly mixing by grit that 30 DEG C of water and partial size are 3mm,
Level concussion 130 seconds.
Further include correction process before the acid cleaning process: low carbon steel plate being stretched and is bent by roller drawing and straightening machine is strong
Directly.The template that can not only improve hot-rolled mild steel sheet is done so, and subsequent scale removal effect can be effectively improved, guarantees plate face matter
Amount.
It further include following steps: by roller straightener to low-carbon after the uncoiling of steel plate after smooth in the acid cleaning process
Steel plate is aligned, and is made steel plate convenient for threading, is improved operating efficiency.
Specifically, the production technology of the low carbon steel plate are as follows: 1700mm milling train is used, it is raw with the slab with a thickness of 240mm
It produces with a thickness of 4mm, width 800mm.The chemical component of low carbon steel plate is same as Example 1 according to mass fraction meter.Embodiment 2
Production technology made from steel plate good mechanical properties, tensile strength is greater than 310MPa, and yield strength is up to 200MPa or more,
Elongation after fracture is greater than 42%, Lankford r value 0.4-0.6, strain hardening exponent n value 0.18-0.21.
The production technology that embodiment 2 provides can reach it is following the utility model has the advantages that
1, due to avoiding using corrosive liquids such as acid solutions, the production technology of the present embodiment 1 does not need to float steel plate
The technical process washed and dried shortens process cycle.
2, by the way that water to be forced into certain pressure, the tiny grit of corner angle provided with sand supplying system is efficiently mixed, and is formed
High energy mortar stream, throws at a high speed the upper and lower surface of low carbon steel plate, will by the strike, erosion and abrasive action of high speed mortar stream
The removings such as iron scale, the impurity of low carbon steel plate are clean, to achieve the purpose that cleaning, de-scaling.
3, due to by the way of purely mechanic physics rather than chemistry mode clean, non-pollution discharge.Compact life
Production. art and the process length significantly shortened simplify producing line, reduce production cost.
4, the Hydrogen Brittleness Phenomena that the acid cleaning process of chemistry generates is overcome, will not generate performance to surface and substrate influences.
5, acid cleaning process can flexibly control the influence such as time, speed, convenient for control, not will cause overpickling, parking spot etc.
Phenomenon.
Embodiment 3
A kind of production technology of hot rolling anacidity pickling low carbon steel plate, production technology and acid cleaning process including low carbon steel plate,
Specifically, the acid cleaning process includes: to the uncoiling of steel plate after smooth, mechanical lapping pickling, mortar pickling, curling process.
The production technology of the low carbon steel plate includes molten iron pretreatment, converter smelting, external refining, sheet billet continuous casting, stepping
Formula heats stove heating, rolling, laminar cooling water cooling, curling and smooth.
The mortar pickling includes the following steps: water and grit being mixed into mortar, by impeller head by mortar cast to
The surface of low carbon steel plate, the projectile direction of mortar and the angle of low carbon steel plate are 45 °.
The half that casts region transverse width be greater than low carbon steel plate maximum width of the mortar in low carbon steel plate.
The rolling direction of the low carbon steel plate is equipped with multiple impeller heads, and each impeller head corresponds to different projectile regions.
The ejection velocity of the multiple impeller head is gradually reduced along rolling direction, the particle of grit in used mortar
Degree liquid sequentially reduces.
It further includes rinsing process that in the rolling direction the last one, which casts region: using clear water by spray tube to low-carbon
Steel plate is cleaned, and is then dried by drying machine, and the antirust ability of low carbon steel plate is improved.
After rinsing process, low carbon steel plate is imaged, judges scale removal effect, in favor of carrying out closed loop control to integrated artistic
System, increases or decreases surface treatment linear velocity.
The mechanical lapping pickling includes the following steps: that the grit by 40 DEG C of water and partial size 1mm is distinguished after evenly mixing
In Injection Level oscillator and vertical oscialltor, vertical concussion 15 seconds first, then horizontal concussion processing 20 seconds.Make low carbon steel plate
Surface scale partly peel off, in favor of improve mortar acid pickling step pickling effect.
Further include correction process before the acid cleaning process: low carbon steel plate being stretched and is bent by roller drawing and straightening machine is strong
Directly.The template that can not only improve hot-rolled mild steel sheet is done so, and subsequent scale removal effect can be effectively improved, guarantees plate face matter
Amount.
It further include following steps: by roller straightener to low-carbon after the uncoiling of steel plate after smooth in the acid cleaning process
Steel plate is aligned, and is made steel plate convenient for threading, is improved operating efficiency.
Specifically, the production technology of the low carbon steel plate are as follows: 1700mm milling train is used, it is raw with the slab with a thickness of 140mm
It produces with a thickness of 1mm, width 1500mm.The chemical component of low carbon steel plate is same as Example 1 according to mass fraction meter.Embodiment
The good mechanical properties of steel plate made from 3 production technology, tensile strength be greater than 310MPa, yield strength be up to 200MPa with
On, elongation after fracture is greater than 42%, Lankford r value 0.5-0.7, strain hardening exponent n value 0.20-0.23.
The production technology that embodiment 3 provides can reach it is following the utility model has the advantages that
1, due to avoiding using corrosive liquids such as acid solutions, the production technology of the present embodiment 1 does not need to float steel plate
The technical process washed and dried shortens process cycle.
2, by the way that water to be forced into certain pressure, the tiny grit of corner angle provided with sand supplying system is efficiently mixed, and is formed
High energy mortar stream, throws at a high speed the upper and lower surface of low carbon steel plate, will by the strike, erosion and abrasive action of high speed mortar stream
The removings such as iron scale, the impurity of low carbon steel plate are clean, to achieve the purpose that cleaning, de-scaling.
3, due to by the way of purely mechanic physics rather than chemistry mode clean, non-pollution discharge.Compact life
Production. art and the process length significantly shortened simplify producing line, reduce production cost.
4, the Hydrogen Brittleness Phenomena that the acid cleaning process of chemistry generates is overcome, will not generate performance to surface and substrate influences.
5, acid cleaning process can flexibly control the influence such as time, speed, convenient for control, not will cause overpickling, parking spot etc.
Phenomenon.
According to the disclosure and teachings of the above specification, those skilled in the art in the invention can also be to above-mentioned embodiment party
Formula is changed and is modified.Therefore, the invention is not limited to the specific embodiments disclosed and described above, to of the invention
Some modifications and changes should also be as falling into the scope of the claims of the present invention.In addition, although being used in this specification
Some specific terms, these terms are merely for convenience of description, does not limit the present invention in any way.
Claims (10)
1. a kind of production technology of hot rolling anacidity pickling low carbon steel plate, production technology and acid cleaning process including low carbon steel plate,
It is characterized in that, the acid cleaning process includes: to the uncoiling of steel plate after smooth, mechanical lapping pickling, mortar pickling, curling process；
The mortar pickling includes the following steps: water and grit being mixed into mortar, is cast mortar to low carbon steel plate by impeller head
Surface, the projectile direction of mortar and the angle of low carbon steel plate are 0-45 °.
2. production technology according to claim 1, which is characterized in that the production technology of the low carbon steel plate includes that molten iron is pre-
Processing, converter smelting, external refining, sheet billet continuous casting, stepped heating stove heating, rolling, laminar cooling water is cooling, curling is peaceful
It is whole.
3. production technology according to claim 1, which is characterized in that the mortar is lateral in the projectile region of low carbon steel plate
Width is greater than the half of low carbon steel plate maximum width.
4. production technology according to claim 1, which is characterized in that the rolling direction of the low carbon steel plate is equipped with multiple
Impeller head, each impeller head correspond to different projectile regions；The ejection velocity of the multiple impeller head gradually subtracts along rolling direction
Small, the grain graininess of grit sequentially reduces in used mortar.
5. production technology according to claim 4, which is characterized in that in the rolling direction the last one casts region also
Including rinsing process: being cleaned by spray tube to low carbon steel plate using clear water, be then dried by drying machine.
6. production technology according to claim 1, which is characterized in that the mechanical lapping pickling include the following steps: by
The grit of 20-40 DEG C of water and partial size 3-10mm are after evenly mixing in Injection Level oscillator, level concussion 130-170 seconds.
7. production technology according to claim 1, which is characterized in that the mechanical lapping pickling include the following steps: by
20-40 DEG C of water and the grit of partial size 1-5mm inject in vertical oscialltor after evenly mixing, vertical concussion 80-120 seconds.
8. production technology according to claim 1, which is characterized in that the mechanical lapping pickling include the following steps: by
20-40 DEG C of water and the grit of partial size 1-5mm are injected separately into horizontal oscillator tube and vertical oscialltor after evenly mixing, are hung down first
Straight concussion 15-30 seconds, then horizontal concussion processing 20-60 seconds.
9. production technology according to claim 1, which is characterized in that further include correction process before the acid cleaning process:
Stretching and bending straightening are carried out to low carbon steel plate by roller drawing and straightening machine.
10. production technology according to claim 1, which is characterized in that in the acid cleaning process, open the steel plate after smooth
Further include following steps after volume: low carbon steel plate being aligned by roller straightener.
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| CN114130842A (en) * | 2021-11-29 | 2022-03-04 | 东北大学 | Method for removing oxide skin of high Cr-Si alloyed 1000-plus 1800 MPa-level hot forming steel |
| CN114604981A (en) * | 2020-12-08 | 2022-06-10 | 淄博环能海臣环保技术服务有限公司 | Equipment for producing drinking pure plain boiled water by heating raw water to remove hardness without discharging waste water |
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