CN111673382A - Preparation method of ultra-8K stainless steel coil - Google Patents
Preparation method of ultra-8K stainless steel coil Download PDFInfo
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- CN111673382A CN111673382A CN202010485496.1A CN202010485496A CN111673382A CN 111673382 A CN111673382 A CN 111673382A CN 202010485496 A CN202010485496 A CN 202010485496A CN 111673382 A CN111673382 A CN 111673382A
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Abstract
The invention provides a preparation method of an ultra-8K stainless steel coil, which adopts a continuous production process, and hot-rolled stainless steel strips selected are sequentially subjected to cold rolling treatment, sanding treatment, rough grinding treatment, deep rough grinding treatment, fine grinding treatment, pattern eliminating treatment, cleaning treatment and drying treatment, so that the stainless steel coil with the 60-degree angle glossiness of more than or equal to 670 and the roughness of less than or equal to 0.05 mu m is finally obtained, the stainless steel coil conforms to the physical characteristics of ultra-8K, the production efficiency is high, and the requirement of mass production in the market can be met.
Description
Technical Field
The invention relates to the field of stainless steel preparation, in particular to a preparation method of an ultra-8K stainless steel coil.
Background
The stainless steel has the characteristics of high hardness, good wear resistance, good corrosion resistance, excellent appearance, long service life and the like, and is widely applied to the industries such as buildings, automobile industry, shipbuilding industry, marine devices, mechanical equipment, chemical equipment and the like. The high-quality mirror polishing of the surface of the stainless steel product is one of the key factors ensuring that the stainless steel product is widely applied to industries such as buildings, automobile industry, shipbuilding industry, marine devices, mechanical equipment, chemical equipment and the like, and the 8K product is one of main products applied to the stainless steel product, has wide application and is mainly applied to the aspect of architectural decoration.
The 8K plate is a stainless steel plate with a flat surface and mirror luster after stainless steel raw materials are ground and polished, and is also called a mirror plate; the brightness is higher than 8K, or called as 8K +, and the like, and the refractive index is more than 99%. Traditional 8K products originate from flat 8K polishing, followed by development of a full roll of 8K polishing in a simple manner.
The existing 8K plate only has a plate 8K product, the main control point is on the brightness, the roughness and the grinding head flower control of the surface of the 8K plate, the stainless steel plate can be processed once or for many times to obtain the high-quality precise 8K product with high brightness, low roughness and few grinding head flowers, but the current whole-roll stainless steel product is difficult to obtain the high-brightness, low-roughness and few grinding head flower 8K product through processing, namely, the whole-roll precise 8K stainless steel coil cannot be produced, and the market demand cannot be met.
Disclosure of Invention
The invention aims to solve the problems in the prior art and provides a preparation method of an ultra-8K stainless steel coil so as to meet market requirements.
The technical scheme adopted by the invention is as follows:
a preparation method of an ultra-8K stainless steel coil comprises the following steps,
1) cold rolling treatment: selecting a hot-rolled stainless steel strip with the surface roughness of less than or equal to 2.4 mu m for rolling, controlling the reduction rate to be 65-68%, controlling the roughness of the produced cold-rolled stainless steel strip to be less than or equal to 0.15 mu m, and preparing the cold-rolled stainless steel strip with the roughness of less than or equal to 0.25 mu m after annealing, pickling and passivating;
2) sanding treatment: processing the cold-rolled stainless steel strip by a sanding machine to treat the surface passivation layer of the cold-rolled stainless steel material, wherein the surface roughness of the prepared cold-rolled stainless steel strip is between 0.12 and 0.16 mu m, and the glossiness at the angle of 60 ℃ is controlled between 250 DEG and 300 DEG;
3) coarse grinding treatment: conveying the cold-rolled stainless steel strip prepared in the step 2) into a sand roller coarse grinding unit under the constant tension of 2000-4000kg for coarse grinding, wherein the rotation frequency of the sand roller coarse grinding unit is 50hz, and the reduction current is controlled to be 8-10A;
4) deep coarse grinding treatment: conveying the stainless steel strip prepared in the step 3) into a nylon millstone circular oscillating unit for deep coarse grinding, wherein the rotation frequency of the nylon millstone circular oscillating unit is 50hz, the oscillation frequency is 40-50hz, the reduction current is 3.8-5.5A, the surface roughness of the prepared stainless steel strip is less than or equal to 0.1 mu m, and the glossiness at an angle of 60 degrees is more than or equal to 400;
5) fine grinding treatment: transmitting the stainless steel strip prepared in the step 4) into a wool wheel circular pendulum unit for fine grinding treatment, wherein the rotation frequency of the wool wheel circular pendulum unit is 50hz, the swing frequency is 40-50hz, the reduction current is 4.0-6.0A, the glossiness of the surface of the prepared stainless steel strip at an angle of 60 degrees is more than or equal to 670, and the surface roughness is less than or equal to 0.05 mu m;
6) eliminating the flowers: transferring the stainless steel band prepared in the step 5) into a wool wheel circular pendulum unit for eliminating the patterns, wherein a grinding head of the wool wheel circular pendulum unit stops rotating, the swing frequency is 40-50hz, and the reduction current is 3.5-3.8A;
7) cleaning treatment: conveying the stainless steel belt prepared in the step 6) into a cleaning section for cleaning, wherein the spraying pressure of cleaning water used in the cleaning section is more than or equal to 3Map, the conductivity of the cleaning water of the front pre-cleaning section is less than or equal to 3000us/cm, the cleaning water of the middle water replenishing section is pure water, and the conductivity of the cleaning water of the rear cleaning section is less than or equal to 500 us/cm;
8) drying treatment: after the step 7) of cleaning, the stainless steel band is conveyed into a drying section to finish drying treatment.
Further, in the step 2), the sander comprises five sanding grinder units, the five sanding grinder units respectively polish the cold-rolled stainless steel strip, the sanding belt adopted by the sanding grinder unit is a 180-mesh old sanding belt, the old sanding belt is set to have a grinding length of 15000-30000 meters, the pressing current of the sanding belt is 35-45A, the rotation frequency of the sanding belt is 50hz, and the rotation speed is 2950 r/min.
Further, in the step 3), six groups of the sand roller rough grinding machine set are provided.
Further, in the step 4), fifteen sets of the nylon grinding disc circular oscillating unit are provided.
Further, the cooling and washing water used for grinding in the step 3) and the step 4) is pure water or tap water, the conductivity of the cooling and washing water is less than or equal to 2000us/cm, and the ph value is 6-8.
Further, in the step 5), fifteen groups of wool wheel circular pendulum units are arranged.
Further, in the step 5), when the wool wheel circular pendulum unit polishes the stainless steel strip, a liquid medicine I is sprayed on the surface of the stainless steel strip, the liquid medicine I is an abrasive prepared by mixing nitric acid, pure water or tap water and alumina, the nitric acid concentration of the liquid medicine I is 70-90g/L, and the metal ions are less than or equal to 80 g/L.
Further, in the step 6), three groups of wool wheel circular pendulum units are provided.
Further, in the step 6), when the wool wheel circular pendulum unit carries out the cotton eliminating treatment on the stainless steel band, a liquid medicine II is sprayed on the surface of the stainless steel band, the liquid medicine II is an abrasive formed by mixing nitric acid, pure water or tap water and alumina, the nitric acid concentration of the liquid medicine II is 90-120g/L, and the metal ion concentration is less than or equal to 70 g/L.
Further, in the step 7), the cleaning section cleans the stainless steel strip by using a row brush and a roller brush in an alternating mode, and the cleaning water is circularly sprayed to the cleaning section by using a high-pressure pump.
The invention has the beneficial effects that:
the method can prepare the stainless steel strip coil with the 60-degree angle gloss of more than or equal to 670 and the roughness of less than or equal to 0.05 mu m, and improves the production efficiency through a continuous production process, thereby meeting the market demand.
Drawings
The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the invention without limiting the invention. In the drawings, there is shown in the drawings,
FIG. 1: the invention provides a flow chart of a preparation method of an ultra-8K stainless steel coil.
Detailed Description
The following detailed description of embodiments of the invention refers to the accompanying drawings. It should be understood that the detailed description and specific examples, while indicating the present invention, are given by way of illustration and explanation only, not limitation.
Referring to fig. 1, an embodiment of the present invention discloses a method for preparing an ultra 8K stainless steel coil, including the following steps:
firstly, the method is finished by adopting continuous production on a steel strip continuous production line, the steel strip coil which is selected from the front end is unreeled and then is continuously transmitted on the production line in sequence, the finally manufactured finished steel strip is reeled at the tail end of the production line to manufacture the finished steel strip coil, and the following process steps are respectively arranged on the continuous production line according to the front and back sequence and are finished in sequence.
Specifically, in the method, in the first step, the steel strip is subjected to 1) cold rolling: selecting a hot-rolled stainless steel strip with the surface roughness less than or equal to 2.4 mu m for rolling, controlling the reduction rate to be 65-68%, controlling the roughness of the produced cold-rolled stainless steel strip to be less than or equal to 0.15 mu m, and preparing the cold-rolled stainless steel strip with the roughness less than or equal to 0.25 mu m after annealing, pickling and passivating.
And step two, carrying out 2) sanding treatment on the steel strip: and processing the cold-rolled stainless steel strip by a sanding machine to treat the surface passivation layer of the cold-rolled stainless steel material, wherein the surface roughness of the prepared cold-rolled stainless steel strip is between 0.12 and 0.16 mu m, and the glossiness at the angle of 60 ℃ is controlled between 250 DEG and 300 DEG. In a preferred embodiment, the sander comprises five sanding grinder units, the five sanding grinder units respectively polish the cold-rolled stainless steel strip, an abrasive belt adopted by the sanding grinder unit is a 180-mesh old abrasive belt, the old abrasive belt is set to have a grinding length of 15000-30000 meters, the pressing current of the abrasive belt is 35-45A, the rotation frequency of the abrasive belt is 50hz, and the rotation speed is 2950 r/min.
And thirdly, the steel strip is subjected to 3) coarse grinding treatment: and (3) conveying the cold-rolled stainless steel strip prepared in the second step into a sand roller coarse grinding unit under the constant tension of 2000-4000kg for coarse grinding, wherein the rotation frequency of the sand roller coarse grinding unit is 50hz, and the reduction current is controlled to be 8-10A. In one preferred embodiment, the sand roller rough grinding machine set is provided with six groups. The cooling and cleaning water used for grinding is pure water or tap water, the conductivity of the cooling and cleaning water is less than or equal to 2000us/cm, and the ph value is 6-8.
The fourth step, the steel strip is subjected to 4) deep rough grinding treatment: and (3) conveying the stainless steel strip prepared in the third step into a nylon millstone circular oscillating unit for deep coarse grinding, wherein the rotation frequency of the nylon millstone circular oscillating unit is 50hz, the oscillation frequency is 40-50hz, the reduction current is 3.8-5.5A, the surface roughness of the prepared stainless steel strip is less than or equal to 0.1 mu m, and the glossiness at an angle of 60 degrees is more than or equal to 400. In one preferred embodiment, the nylon grinding disc circular oscillating unit is provided with fifteen groups. The cooling and cleaning water used for grinding is pure water or tap water, the conductivity of the cooling and cleaning water is less than or equal to 2000us/cm, and the ph value is 6-8.
And a fifth step of subjecting the steel strip to 5) finish grinding treatment: and (3) transmitting the stainless steel strip prepared in the fourth step into a wool wheel circular pendulum unit for fine grinding treatment, wherein the rotation frequency of the wool wheel circular pendulum unit is 50hz, the swing frequency is 40-50hz, the reduction current is 4.0-6.0A, after 8K fine grinding treatment, scratches generated by a nylon grinding head used in the previous coarse grinding procedure are eliminated, the surface 60-degree angle glossiness of the prepared stainless steel strip is more than or equal to 670, and the surface roughness is less than or equal to 0.05 mu m. In one preferred embodiment, the wool wheel pendulum units are provided in fifteen groups. When the wool wheel circular pendulum unit polishes the stainless steel band, the wool wheel circular pendulum unit also comprises a step of spraying a liquid medicine I on the surface of the stainless steel band, wherein the liquid medicine I is an abrasive formed by mixing nitric acid, pure water or tap water and alumina, the concentration of the nitric acid in the liquid medicine I is 70-90g/L, and the metal ions are less than or equal to 80 g/L.
And sixthly, carrying out 6) pattern elimination treatment on the steel strip: after the fine grinding treatment, the brightness and the roughness characteristics of the stainless steel surface reach the fine grinding standard, the stainless steel band prepared in the fifth step is transmitted into a wool wheel circular pendulum unit for eliminating the flaws, a grinding head of the wool wheel circular pendulum unit stops rotating, the swinging frequency is 40-50hz, the pressing current is 3.5-3.8A, and the flaws on the surface of the stainless steel are eliminated through the procedure of eliminating the flaws of the wool wheel grinding in the previous fine grinding procedure. In one preferred embodiment, the wool wheel pendulum units are provided in three groups. When the wool wheel circular pendulum unit carries out pattern elimination treatment on the stainless steel band, the wool wheel circular pendulum unit also comprises a step of spraying a liquid medicine II on the surface of the stainless steel band, wherein the liquid medicine II is an abrasive formed by mixing nitric acid, pure water or tap water and alumina, the concentration of the nitric acid of the liquid medicine II is 90-120g/L, and the metal ions are less than or equal to 70 g/L.
Seventh step, the steel strip is subjected to 7) cleaning treatment: and after deep fine grinding treatment, conveying the stainless steel belt prepared in the sixth step into a cleaning section for cleaning, wherein the spraying pressure of cleaning water used in the cleaning section is more than or equal to 3Map, the conductivity of the cleaning water in the pre-cleaning section at the front section is less than or equal to 3000us/cm, the cleaning water in the water replenishing section at the middle section is pure water, and the conductivity of the cleaning water in the cleaning section at the rear section is less than or equal to 500 us/cm. In a preferred embodiment, the cleaning section cleans the stainless steel strip by using a row brush and a roller brush in an alternating mode, and cleaning water is circularly sprayed to the cleaning section by using a high-pressure pump.
And eighth step, carrying out 8) drying treatment on the steel strip: after the seventh step of cleaning, the stainless steel band is conveyed into a drying section to complete drying treatment.
The method can prepare the stainless steel strip coil with the 60-degree angle gloss of more than or equal to 670 and the roughness of less than or equal to 0.05 mu m, improves the production efficiency through a continuous production process, meets the physical characteristics of over 8K, has high production efficiency, and can meet the requirement of mass production in the market.
Any combination of the various embodiments of the present invention should be considered as disclosed in the present invention, unless the inventive concept is contrary to the present invention; within the scope of the technical idea of the invention, any combination of various simple modifications and different embodiments of the technical solution without departing from the inventive idea of the present invention shall fall within the protection scope of the present invention.
Claims (10)
1. A preparation method of an ultra-8K stainless steel coil comprises the following steps,
1) cold rolling treatment: selecting a hot-rolled stainless steel strip with the surface roughness of less than or equal to 2.4 mu m for rolling, controlling the reduction rate to be 65-68%, controlling the roughness of the produced cold-rolled stainless steel strip to be less than or equal to 0.15 mu m, and preparing the cold-rolled stainless steel strip with the roughness of less than or equal to 0.25 mu m after annealing, pickling and passivating;
2) sanding treatment: processing the cold-rolled stainless steel strip by a sanding machine to treat the surface passivation layer of the cold-rolled stainless steel material, wherein the surface roughness of the prepared cold-rolled stainless steel strip is between 0.12 and 0.16 mu m, and the glossiness at the angle of 60 ℃ is controlled between 250 DEG and 300 DEG;
3) coarse grinding treatment: conveying the cold-rolled stainless steel strip prepared in the step 2) into a sand roller coarse grinding unit under the constant tension of 2000-4000kg for coarse grinding, wherein the rotation frequency of the sand roller coarse grinding unit is 50hz, and the reduction current is controlled to be 8-10A;
4) deep coarse grinding treatment: conveying the stainless steel strip prepared in the step 3) into a nylon millstone circular oscillating unit for deep coarse grinding, wherein the rotation frequency of the nylon millstone circular oscillating unit is 50hz, the oscillation frequency is 40-50hz, the reduction current is 3.8-5.5A, the surface roughness of the prepared stainless steel strip is less than or equal to 0.1 mu m, and the glossiness at an angle of 60 degrees is more than or equal to 400;
5) fine grinding treatment: transmitting the stainless steel strip prepared in the step 4) into a wool wheel circular pendulum unit for fine grinding treatment, wherein the rotation frequency of the wool wheel circular pendulum unit is 50hz, the swing frequency is 40-50hz, the reduction current is 4.0-6.0A, the glossiness of the surface of the prepared stainless steel strip at an angle of 60 degrees is more than or equal to 670, and the surface roughness is less than or equal to 0.05 mu m;
6) eliminating the flowers: transferring the stainless steel band prepared in the step 5) into a wool wheel circular pendulum unit for eliminating the patterns, wherein a grinding head of the wool wheel circular pendulum unit stops rotating, the swing frequency is 40-50hz, and the reduction current is 3.5-3.8A;
7) cleaning treatment: conveying the stainless steel belt prepared in the step 6) into a cleaning section for cleaning, wherein the spraying pressure of cleaning water used in the cleaning section is more than or equal to 3Map, the conductivity of the cleaning water of the front pre-cleaning section is less than or equal to 3000us/cm, the cleaning water of the middle water replenishing section is pure water, and the conductivity of the cleaning water of the rear cleaning section is less than or equal to 500 us/cm;
8) drying treatment: after the step 7) of cleaning, the stainless steel band is conveyed into a drying section to finish drying treatment.
2. The method for preparing the stainless steel coil with the thickness of 8K according to claim 1, wherein in the step 2), the sander comprises five sanding grinder units, the five sanding grinder units respectively sand the cold-rolled stainless steel coil, the sanding belt adopted by the sanding grinder units is an old sanding belt with the thickness of 180 meshes, the old sanding belt is set to have a grinding length of 15000-30000 meters, the pressing current of the sanding belt is 35-45A, the rotation frequency of the sanding belt is 50hz, and the rotation speed is 2950 r/min.
3. The method for preparing the ultra 8K stainless steel coil as claimed in claim 1, wherein in the step 3), the grinding roller rough grinding machine set has six groups.
4. The method for preparing the ultra 8K stainless steel coil according to the claim 1, wherein in the step 4), the nylon abrasive disc circular oscillating unit is provided with fifteen groups.
5. The method for preparing the ultra 8K stainless steel coil as claimed in claim 1, wherein the cooling and washing water used for grinding in the steps 3) and 4) is pure water or tap water, the conductivity is less than or equal to 2000us/cm, and the ph value is 6-8.
6. The method for preparing the ultra 8K stainless steel coil as claimed in claim 1, wherein in the step 5), the wool wheel circular pendulum unit is provided with fifteen groups.
7. The method for preparing the stainless steel coil with the thickness of 8K according to claim 1, wherein in the step 5), when the wool wheel circular pendulum unit polishes the stainless steel strip, the method further comprises the step of spraying a chemical agent I onto the surface of the stainless steel strip, wherein the chemical agent I is an abrasive prepared by mixing nitric acid, pure water or tap water and alumina, the nitric acid concentration of the chemical agent I is 70-90g/L, and the metal ions are less than or equal to 80 g/L.
8. The method for preparing the ultra 8K stainless steel coil as claimed in claim 1, wherein in the step 6), three sets of wool wheel circular pendulum units are provided.
9. The method for preparing the stainless steel coil with the thickness of 8K according to claim 1, wherein in the step 6), when the wool wheel pendulum unit carries out the cotton removing treatment on the stainless steel coil, a liquid medicine II is sprayed on the surface of the stainless steel coil, the liquid medicine II is an abrasive formed by mixing nitric acid, pure water or tap water and alumina, the nitric acid concentration of the liquid medicine II is 90-120g/L, and the metal ions are less than or equal to 70 g/L.
10. The method for preparing the ultra 8K stainless steel coil according to claim 1, wherein in the step 7), the cleaning section cleans the stainless steel coil by using a row brush and a roller brush in an alternating manner, and cleaning water is circularly sprayed to the cleaning section by using a high-pressure pump.
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
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| US20030152788A1 (en) * | 2002-02-14 | 2003-08-14 | Velliky James E. | Polymer-coated metal strip and method of production |
| CN105108617A (en) * | 2015-08-20 | 2015-12-02 | 宏旺投资集团有限公司 | Mirror processing method for stainless steel plate and polishing machine adopted in the same |
| CN106826437A (en) * | 2016-12-16 | 2017-06-13 | 安徽宝恒新材料科技有限公司 | A kind of preparation method of corrosion-resistant 8K plates |
| CN110732840A (en) * | 2019-10-18 | 2020-01-31 | 鹤山市精工制版有限公司 | Plate roller manufacturing process and laser plate roller |
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2020
- 2020-06-01 CN CN202010485496.1A patent/CN111673382B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20030152788A1 (en) * | 2002-02-14 | 2003-08-14 | Velliky James E. | Polymer-coated metal strip and method of production |
| CN105108617A (en) * | 2015-08-20 | 2015-12-02 | 宏旺投资集团有限公司 | Mirror processing method for stainless steel plate and polishing machine adopted in the same |
| CN106826437A (en) * | 2016-12-16 | 2017-06-13 | 安徽宝恒新材料科技有限公司 | A kind of preparation method of corrosion-resistant 8K plates |
| CN110732840A (en) * | 2019-10-18 | 2020-01-31 | 鹤山市精工制版有限公司 | Plate roller manufacturing process and laser plate roller |
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