CN112226775A - Cold-rolled steel pickling process - Google Patents
Cold-rolled steel pickling process Download PDFInfo
- Publication number
- CN112226775A CN112226775A CN202010975865.5A CN202010975865A CN112226775A CN 112226775 A CN112226775 A CN 112226775A CN 202010975865 A CN202010975865 A CN 202010975865A CN 112226775 A CN112226775 A CN 112226775A
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- China
- Prior art keywords
- rolled steel
- cold
- treatment
- acid
- pickling
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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
- C23G1/086—Iron or steel solutions containing HF
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B08—CLEANING
- B08B—CLEANING IN GENERAL; PREVENTION OF FOULING IN GENERAL
- B08B3/00—Cleaning by methods involving the use or presence of liquid or steam
- B08B3/02—Cleaning by the force of jets or sprays
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B24—GRINDING; POLISHING
- B24B—MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
- B24B1/00—Processes of grinding or polishing; Use of auxiliary equipment in connection with such processes
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B24—GRINDING; POLISHING
- B24B—MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
- B24B49/00—Measuring or gauging equipment for controlling the feed movement of the grinding tool or work; Arrangements of indicating or measuring equipment, e.g. for indicating the start of the grinding operation
- B24B49/006—Measuring or gauging equipment for controlling the feed movement of the grinding tool or work; Arrangements of indicating or measuring equipment, e.g. for indicating the start of the grinding operation taking regard of the speed
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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
- C21D1/30—Stress-relieving
Abstract
A cold rolled steel pickling process comprises the following processing steps: and (3) heat treatment: feeding cold rolled steel into a boiler for heating, and then performing air cooling operation; sanding treatment: clamping cold-rolled steel by using a clamp, and then performing rough grinding on the surface of the cold-rolled steel by using a grinding machine; the method has the technical key points that the stress in the cold-rolled steel is eliminated by utilizing a heat treatment technology, so that the impurities on the surface of the cold-rolled steel are crusted and cracked by utilizing the principle of expansion with heat and contraction with cold of a metal component while partial water stain on the surface of the cold-rolled steel is evaporated, and the time of subsequent frosting treatment is shortened; when the pickling treatment is carried out, the three-section type treatment tank is used, the pickling treatment can be carried out on the cold-rolled steel twice, the iron scales generated on the surface of the cold-rolled steel can be mechanically removed between the two pickling treatments, the pickling operation is carried out simultaneously in three steps, and the working efficiency is improved to a certain extent.
Description
Technical Field
The invention belongs to the field of surface treatment of cold rolled steel, and particularly relates to a cold rolled steel pickling process.
Background
Cold rolled steel is steel produced by cold rolling. Cold rolling is a steel sheet obtained by further reducing a steel sheet of No.1 to a target thickness at room temperature. Compared with a hot rolled steel plate, the cold rolled steel plate has more accurate thickness, smooth and beautiful surface and various excellent mechanical properties, particularly in the aspect of processing property. Since cold rolled raw rolls are brittle and hard and are not suitable for processing, cold rolled steel sheets are generally required to be pickled and surface-flattened before being delivered to customers.
The following technical problems are easily caused in the above-mentioned pickling and surface smoothing processes: the impurity on the surface of the cold-rolled steel is not sufficiently removed, and meanwhile, the impurities need to be respectively placed in different pickling solutions when the surface pickling is carried out on the cold-rolled steel, and the pickling step time is prolonged in the process of transferring the cold-rolled steel, so that the problem that the whole working efficiency is low is solved.
Disclosure of Invention
The invention aims to overcome the defects of the prior art and provides a cold rolled steel pickling process.
In order to achieve the purpose, the invention adopts the following technical scheme:
a cold rolled steel pickling process comprises the following processing steps:
and (3) heat treatment: feeding cold rolled steel into a boiler for heating, and then performing air cooling operation;
sanding treatment: clamping cold-rolled steel by using a clamp, and then performing rough grinding on the surface of the cold-rolled steel by using a grinding machine;
acid pickling treatment: feeding into a three-stage treatment tank, feeding into a flowing water type acid washing solution in an initial tank, and performing the first-step dissolving operation;
another grinder is arranged in the middle end groove to carry out the fine grinding operation of the second step;
feeding flowing acid washing solution into the end tank to perform the third step of reduction operation;
washing and drying: and (3) carrying out spray-washing treatment on the surface of the cold-rolled steel by using a high-pressure spray head, and then sending the cold-rolled steel into a dryer for drying operation.
Preferably, in the heat treatment step,
the cold rolled steel is just sent into a boiler, heated to 700 ℃, kept at the temperature for a certain time, the time is 10-30min, and finally sent to the outdoor for cooling treatment until the surface and the internal temperature of the cold rolled steel are the same as the room temperature.
Preferably, in the sanding step,
after the cold-rolled steel cooled to room temperature is clamped and fixed, and then a grinding machine is used, the rotating speed of a shaft rod of the grinding machine is controlled to be 300-500 r/min.
Preferably, in the acid washing treatment step,
the cold-rolled steel is erected on the three-section type processing groove, and the electric cylinder and the driving motor are installed at one end of the cold-rolled steel, so that the cold-rolled steel rotates and moves linearly towards the other end all the time.
Preferably, in the step of acid washing treatment, the acid washing solution in the first dissolving operation comprises the following formula:
hydrofluoric acid, phosphoric acid and other reagents, wherein the proportion of each formula component is 5: 1: 1;
the acid washing solution in the third step of reduction operation comprises the following formula:
hydrofluoric acid, sulfuric acid and other reagents, wherein the ratio of each formula component is 3: 2: 2.
preferably, the other reagents comprise a hydrogen peroxide stabilizer and a surfactant.
Preferably, in the step of the water washing and drying treatment, the power of the used dryer is 500w, and the drying time is 10-30 min.
Compared with the prior art, the invention provides a cold rolled steel pickling process, which has the following beneficial effects:
firstly, stress in cold-rolled steel is eliminated by utilizing a heat treatment technology, so that partial water stain on the surface of the cold-rolled steel is evaporated, and impurities on the surface of the cold-rolled steel are crusted and cracked by utilizing the principle of expansion with heat and contraction with cold of a metal component, thereby reducing the time of subsequent frosting treatment;
secondly, when pickling treatment is carried out, a three-section type treatment tank is used, the pickling treatment can be carried out on the cold-rolled steel twice, meanwhile, iron scales generated on the surface of the cold-rolled steel can be mechanically removed between the two pickling treatments, the pickling operation is carried out simultaneously in three steps, and the working efficiency is improved to a certain extent;
and thirdly, by adopting high-pressure washing and drying operation, the cleanness of the surface of the cold-rolled steel can be further ensured after the whole cold-rolled steel is produced.
Drawings
FIG. 1 is an overall process flow diagram of the present invention.
Detailed Description
The following will further describe a specific embodiment of the pickling process for cold rolled steel according to the present invention with reference to fig. 1. The pickling process of a cold rolled steel according to the present invention is not limited to the description of the following examples.
Example 1
The embodiment provides a specific structure of a cold rolled steel pickling process, and as shown in fig. 1, the cold rolled steel pickling process comprises the following processing steps:
and (3) heat treatment: feeding cold rolled steel into a boiler for heating, and then performing air cooling operation;
sanding treatment: clamping cold-rolled steel by using a clamp, and then performing rough grinding on the surface of the cold-rolled steel by using a grinding machine;
acid pickling treatment: feeding into a three-stage treatment tank, feeding into a flowing water type acid washing solution in an initial tank, and performing the first-step dissolving operation;
another grinder is arranged in the middle end groove to carry out the fine grinding operation of the second step;
feeding flowing acid washing solution into the end tank to perform the third step of reduction operation;
washing and drying: and (3) carrying out spray-washing treatment on the surface of the cold-rolled steel by using a high-pressure spray head, and then sending the cold-rolled steel into a dryer for drying operation.
As shown in fig. 1, in the heat treatment step,
the cold rolled steel is just sent into a boiler, heated to 700 ℃, kept at the temperature for a certain time, the time is 10min, and finally sent to the outdoor for cooling treatment until the surface and the internal temperature of the cold rolled steel are the same as the room temperature.
As shown in fig. 1, in the sanding process step,
after the cold-rolled steel cooled to room temperature is clamped and fixed, and then a grinding machine is used, the rotating speed of a shaft rod of the grinding machine is controlled to be 300 r/min.
As shown in fig. 1, in the pickling treatment step,
the cold-rolled steel is erected on the three-section type processing groove, and the electric cylinder and the driving motor are installed at one end of the cold-rolled steel, so that the cold-rolled steel rotates and moves linearly towards the other end all the time.
As shown in fig. 1, in the pickling process, the pickling solution in the first dissolution operation includes the following formulation:
hydrofluoric acid, phosphoric acid and other reagents, wherein the proportion of each formula component is 5: 1: 1;
the acid washing solution in the third step of reduction operation comprises the following formula:
hydrofluoric acid, sulfuric acid and other reagents, wherein the ratio of each formula component is 3: 2: 2.
wherein, other reagents comprise hydrogen peroxide stabilizer and surfactant.
In the step of water washing and drying treatment, the power of the used dryer is 500w, and the drying time is 10 min.
Example 2
As shown in figure 1, the pickling process of the cold rolled steel comprises the following processing steps:
and (3) heat treatment: feeding cold rolled steel into a boiler for heating, and then performing air cooling operation;
sanding treatment: clamping cold-rolled steel by using a clamp, and then performing rough grinding on the surface of the cold-rolled steel by using a grinding machine;
acid pickling treatment: feeding into a three-stage treatment tank, feeding into a flowing water type acid washing solution in an initial tank, and performing the first-step dissolving operation;
another grinder is arranged in the middle end groove to carry out the fine grinding operation of the second step;
feeding flowing acid washing solution into the end tank to perform the third step of reduction operation;
washing and drying: and (3) carrying out spray-washing treatment on the surface of the cold-rolled steel by using a high-pressure spray head, and then sending the cold-rolled steel into a dryer for drying operation.
As shown in fig. 1, in the heat treatment step,
the cold-rolled steel is heated to 700 ℃ just after being sent into a boiler, then the temperature is kept for a certain time, the time is 30min, and finally the cold-rolled steel is sent to the outdoor for cooling treatment until the surface and the internal temperature of the cold-rolled steel are the same as the room temperature;
the temperature holding time is increased by three times, and when finally a hardness detector is used for detecting cold-rolled steel, the hardness of the cold-rolled steel which is kept at the temperature for 10min in the embodiment 1 is obviously smaller than that of the cold-rolled steel which is kept at the temperature for 30min, so that the longer the heat preservation time is, the higher the hardness is in the interval.
The stress in the cold-rolled steel is eliminated by utilizing the heat treatment technology, so that the impurities on the surface of the cold-rolled steel are crusted and cracked by utilizing the principle of expansion with heat and contraction with cold of a metal component while partial water stain on the surface of the cold-rolled steel is evaporated, and the time of subsequent frosting treatment is shortened.
As shown in fig. 1, in the sanding process step,
after the cold-rolled steel cooled to room temperature is clamped and fixed, and then a grinding machine is used, the rotating speed of a shaft rod of the grinding machine is controlled to be 300-500 r/min.
As shown in fig. 1, in the pickling treatment step,
the cold-rolled steel is erected on the three-section type processing groove, and the electric cylinder and the driving motor are installed at one end of the cold-rolled steel, so that the cold-rolled steel rotates and moves linearly towards the other end all the time. When the pickling treatment is carried out, the three-section type treatment tank is used, the pickling treatment can be carried out on the cold-rolled steel twice, the iron scales generated on the surface of the cold-rolled steel can be mechanically removed between the two pickling treatments, the pickling operation is carried out simultaneously in three steps, and the working efficiency is improved to a certain extent.
As shown in fig. 1, in the pickling process, the pickling solution in the first dissolution operation includes the following formulation:
hydrofluoric acid, phosphoric acid and other reagents, wherein the proportion of each formula component is 5: 1: 1;
the acid washing solution in the third step of reduction operation comprises the following formula:
hydrofluoric acid, sulfuric acid and other reagents, wherein the ratio of each formula component is 3: 2: 2.
wherein, other reagents comprise hydrogen peroxide stabilizer and surfactant.
In the step of water washing and drying treatment, the power of the used dryer is 500w, and the drying time is 10-30 min.
Through adopting high pressure washing and stoving operation, whole cold-rolled steel is after production, can further guarantee the cleanliness of cold-rolled steel surface.
The foregoing is a more detailed description of the invention in connection with specific preferred embodiments and it is not intended that the invention be limited to these specific details. For those skilled in the art to which the invention pertains, several simple deductions or substitutions can be made without departing from the spirit of the invention, and all shall be considered as belonging to the protection scope of the invention.
Claims (7)
1. The acid washing process of the cold rolled steel is characterized by comprising the following processing steps of:
and (3) heat treatment: feeding cold rolled steel into a boiler for heating, and then performing air cooling operation;
sanding treatment: clamping cold-rolled steel by using a clamp, and then performing rough grinding on the surface of the cold-rolled steel by using a grinding machine;
acid pickling treatment: feeding into a three-stage treatment tank, feeding into a flowing water type acid washing solution in an initial tank, and performing the first-step dissolving operation;
another grinder is arranged in the middle end groove to carry out the fine grinding operation of the second step;
feeding flowing acid washing solution into the end tank to perform the third step of reduction operation;
washing and drying: and (3) carrying out spray-washing treatment on the surface of the cold-rolled steel by using a high-pressure spray head, and then sending the cold-rolled steel into a dryer for drying operation.
2. The cold rolled steel pickling process of claim 1, wherein: in the step of the heat treatment,
the cold rolled steel is just sent into a boiler, heated to 700 ℃, kept at the temperature for a certain time, the time is 10-30min, and finally sent to the outdoor for cooling treatment until the surface and the internal temperature of the cold rolled steel are the same as the room temperature.
3. The cold rolled steel pickling process of claim 1, wherein: in the sanding treatment step, the abrasive grain is removed,
after the cold-rolled steel cooled to room temperature is clamped and fixed, and then a grinding machine is used, the rotating speed of a shaft rod of the grinding machine is controlled to be 300-500 r/min.
4. The cold rolled steel pickling process of claim 1, wherein: in the step of the acid-washing treatment,
the cold-rolled steel is erected on the three-section type processing groove, and the electric cylinder and the driving motor are installed at one end of the cold-rolled steel, so that the cold-rolled steel rotates and moves linearly towards the other end all the time.
5. The cold rolled steel pickling process of claim 1, wherein: in the acid washing treatment step, the acid washing solution in the first step of dissolving operation comprises the following formula:
hydrofluoric acid, phosphoric acid and other reagents, wherein the proportion of each formula component is 5: 1: 1;
the acid washing solution in the third step of reduction operation comprises the following formula:
hydrofluoric acid, sulfuric acid and other reagents, wherein the ratio of each formula component is 3: 2: 2.
6. the cold rolled steel pickling process of claim 5, wherein: the other reagents comprise hydrogen peroxide stabilizer and surfactant.
7. The cold rolled steel pickling process of claim 1, wherein: in the step of the water washing and drying treatment, the power of the used dryer is 500w, and the drying time is 10-30 min.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010975865.5A CN112226775A (en) | 2020-09-16 | 2020-09-16 | Cold-rolled steel pickling process |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202010975865.5A CN112226775A (en) | 2020-09-16 | 2020-09-16 | Cold-rolled steel pickling process |
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| CN202010975865.5A Pending CN112226775A (en) | 2020-09-16 | 2020-09-16 | Cold-rolled steel pickling process |
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Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0810823A (en) * | 1994-06-24 | 1996-01-16 | Kawasaki Steel Corp | Annealing and descaling method for cold rolled stainless steel strip |
| JP2009220250A (en) * | 2008-03-18 | 2009-10-01 | Nisshin Steel Co Ltd | Oxidized scale removing method and oxidized scale removing device for stainless cold rolled stainless steel strip |
| CN104047001A (en) * | 2014-06-16 | 2014-09-17 | 中冶南方工程技术有限公司 | 409L cold-rolled strip steel annealing-pickling production process |
| CN107142513A (en) * | 2017-05-09 | 2017-09-08 | 张家港浦项不锈钢有限公司 | High chrome high-nickel stainless-steel cold-rolling annealing and pickling technique |
| US20170306507A1 (en) * | 2014-09-02 | 2017-10-26 | Jfe Steel Corporation | Cold-rolled steel sheet, method of manufacturing cold-rolled steel sheet, automobile member and facility for manufacturing cold-rolled steel sheet |
| CN107502905A (en) * | 2017-10-25 | 2017-12-22 | 苏州华丰不锈钢紧固件有限公司 | A kind of acid cleaning process for effectively removing thick oxide film |
| CN107709620A (en) * | 2015-07-08 | 2018-02-16 | 杰富意钢铁株式会社 | The manufacture method and manufacturing equipment of cold-rolled strip |
| CN109234746A (en) * | 2018-11-12 | 2019-01-18 | 江阴祥瑞不锈钢精线有限公司 | A kind of acid cleaning process method of stainless steel wire |
-
2020
- 2020-09-16 CN CN202010975865.5A patent/CN112226775A/en active Pending
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0810823A (en) * | 1994-06-24 | 1996-01-16 | Kawasaki Steel Corp | Annealing and descaling method for cold rolled stainless steel strip |
| JP2009220250A (en) * | 2008-03-18 | 2009-10-01 | Nisshin Steel Co Ltd | Oxidized scale removing method and oxidized scale removing device for stainless cold rolled stainless steel strip |
| CN104047001A (en) * | 2014-06-16 | 2014-09-17 | 中冶南方工程技术有限公司 | 409L cold-rolled strip steel annealing-pickling production process |
| US20170306507A1 (en) * | 2014-09-02 | 2017-10-26 | Jfe Steel Corporation | Cold-rolled steel sheet, method of manufacturing cold-rolled steel sheet, automobile member and facility for manufacturing cold-rolled steel sheet |
| CN107709620A (en) * | 2015-07-08 | 2018-02-16 | 杰富意钢铁株式会社 | The manufacture method and manufacturing equipment of cold-rolled strip |
| CN107142513A (en) * | 2017-05-09 | 2017-09-08 | 张家港浦项不锈钢有限公司 | High chrome high-nickel stainless-steel cold-rolling annealing and pickling technique |
| CN107502905A (en) * | 2017-10-25 | 2017-12-22 | 苏州华丰不锈钢紧固件有限公司 | A kind of acid cleaning process for effectively removing thick oxide film |
| CN109234746A (en) * | 2018-11-12 | 2019-01-18 | 江阴祥瑞不锈钢精线有限公司 | A kind of acid cleaning process method of stainless steel wire |
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