CN109530435B - Cold rolling method of stainless steel band and stainless steel band - Google Patents
Cold rolling method of stainless steel band and stainless steel band Download PDFInfo
- Publication number
- CN109530435B CN109530435B CN201811510861.9A CN201811510861A CN109530435B CN 109530435 B CN109530435 B CN 109530435B CN 201811510861 A CN201811510861 A CN 201811510861A CN 109530435 B CN109530435 B CN 109530435B
- Authority
- CN
- China
- Prior art keywords
- cold rolling
- stainless steel
- rolling mill
- steel strip
- mill
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Classifications
-
- 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
- B21B1/24—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 in a continuous or semi-continuous process
- B21B1/28—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 in a continuous or semi-continuous process by cold-rolling, e.g. Steckel cold mill
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B13/00—Metal-rolling stands, i.e. an assembly composed of a stand frame, rolls, and accessories
- B21B13/06—Metal-rolling stands, i.e. an assembly composed of a stand frame, rolls, and accessories with axes of rolls arranged vertically, e.g. edgers
-
- 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
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B27/00—Rolls, roll alloys or roll fabrication; Lubricating, cooling or heating rolls while in use
- B21B27/06—Lubricating, cooling or heating rolls
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B37/00—Control devices or methods specially adapted for metal-rolling mills or the work produced thereby
- B21B37/48—Tension control; Compression control
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B41/00—Guiding, conveying, or accumulating easily-flexible work, e.g. wire, sheet metal bands, in loops or curves; Loop lifters
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/001—Ferrous alloys, e.g. steel alloys containing N
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/02—Ferrous alloys, e.g. steel alloys containing silicon
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/04—Ferrous alloys, e.g. steel alloys containing manganese
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
- C22C38/40—Ferrous alloys, e.g. steel alloys containing chromium with nickel
- C22C38/42—Ferrous alloys, e.g. steel alloys containing chromium with nickel with copper
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
- C22C38/40—Ferrous alloys, e.g. steel alloys containing chromium with nickel
- C22C38/58—Ferrous alloys, e.g. steel alloys containing chromium with nickel with more than 1.5% by weight of manganese
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/60—Ferrous alloys, e.g. steel alloys containing lead, selenium, tellurium, or antimony, or more than 0.04% by weight of sulfur
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Metal Rolling (AREA)
Abstract
The invention discloses a cold rolling method of a stainless steel strip, which comprises the following steps: the selected thickness is as follows: 1.0-6.0 mm stainless steel strip blank; coiling the stainless steel strip blank; the stainless steel strip blanks are transmitted to a laser welding machine through an inlet loop, and laser welding is carried out on different rolls of stainless steel strip blanks; carrying out six times of continuous cold rolling treatment on the stainless steel strip blank subjected to laser welding through a cold rolling mill; cleaning the stainless steel strip blank subjected to six-pass cold rolling; and conveying the cleaned stainless steel strip blank to the next process through an outlet loop, and drying, cleaning, annealing, electrolyzing, pickling, straightening and flattening to obtain a stainless steel strip finished product with the thickness of 0.2-4 mm. Correspondingly, the invention also discloses the stainless steel band prepared by the method. By adopting the invention and strictly controlling the rolling process, the rolled finished product has good mechanical property, wide thickness range which can reach 0.2-4 mm, small roughness and bright and high-grade appearance.
Description
Technical Field
The invention relates to the technical field of stainless steel, in particular to a cold rolling method of a stainless steel strip and the stainless steel strip.
Background
The stainless steel band is an extension of the ultrathin stainless steel band, mainly a narrow and long steel band produced to meet the needs of different industrial departments for industrially producing various types of metal or mechanical products, is widely applied to high technology industry, IT industry, aviation and aerospace industry, has high added value, but the rolling process is difficult to master, because internal stress can be generated in the stainless steel band after primary rolling, the effect of finish rolling is influenced, the forming of finished products is greatly influenced, different finished products have different requirements on hardness, the difficulty of the rolling process is increased, the production efficiency is low, and the yield is not high.
Moreover, the thickness range of the stainless steel band produced by the prior art is narrow, usually 0.5-2.0mm, and the requirements of different processing fields on stainless steel bands with different thicknesses cannot be met. In addition, the stainless steel band produced by the prior art has larger roughness, so that the surface is dull and the grade is not high. And the surface quality of the stainless steel strip is affected by the larger roughness.
Disclosure of Invention
The technical problem to be solved by the invention is to provide a cold rolling method of a stainless steel band, and by strictly controlling a rolling process, a rolled finished product has good mechanical property and wide thickness range which can reach 0.2-4 mm, and is small in roughness, bright in appearance and high in grade.
The technical problem to be solved by the invention is to provide a cold rolling method of the stainless steel strip, and the ultrathin stainless steel strip with the thickness as low as 0.2mm can be produced by using a six-pass cold rolling process.
The invention aims to solve the technical problem of providing a stainless steel band which has good mechanical property, wide thickness range which can reach 0.2-4 mm, bright appearance and high grade.
In order to solve the above problems, the present invention provides a method for cold rolling a stainless steel strip, comprising:
the selected thickness is as follows: 1.0-6.0 mm stainless steel strip blank;
coiling the stainless steel strip blank;
the rolled stainless steel band blanks are transmitted to a laser welding machine through an inlet loop, and laser welding is carried out on different rolled stainless steel band blanks;
carrying out first cold rolling on the stainless steel strip blank subjected to laser welding through a first cold rolling mill;
carrying out second-pass cold rolling on the stainless steel strip blank subjected to the first-pass cold rolling through a second cold rolling mill;
carrying out third cold rolling on the stainless steel strip blank subjected to the second cold rolling through a third cold rolling mill;
carrying out fourth cold rolling on the stainless steel strip blank subjected to the third cold rolling through a fourth cold rolling mill;
carrying out fifth-pass cold rolling on the stainless steel strip blank subjected to the fourth-pass cold rolling through a fifth cold rolling mill;
carrying out sixth cold rolling on the stainless steel strip blank subjected to the fifth cold rolling through a sixth cold rolling mill;
cleaning the stainless steel strip blank subjected to the sixth cold rolling;
and conveying the cleaned stainless steel strip blank to the next process through an outlet loop, and drying, cleaning, annealing, electrolyzing, pickling, straightening and flattening to obtain a stainless steel strip finished product with the thickness of 0.2-4 mm.
As an improvement of the scheme, the finished stainless steel band comprises the following components in percentage by weight:
0.01-0.05% of C, 6.0-9.5% of Ni, 16.5-20.0% of Cr, 0.1-3.0% of Mn, 0.01-0.2% of Cu, 0.15-1.0% of Si, 0.01-0.2% of P, 0.01-0.1% of S, 0.02-0.15% of N, and the balance of Fe and inevitable impurities.
As an improvement of the scheme, the finished stainless steel strip has the thickness of 0.3-3mm, the yield strength of 300-350MPa, the tensile strength of 700-750MPa, the tensile rate of 50-70%, the hardness of 160-180HV and the surface roughness of 0.15-0.25 mu m.
As an improvement of the scheme, the first cold rolling mill, the second cold rolling mill, the third cold rolling mill, the fourth cold rolling mill, the fifth cold rolling mill and the sixth cold rolling mill are arranged in series and used for rolling the stainless steel strips with different thicknesses at one time.
As an improvement of the scheme, the first cold rolling mill, the second cold rolling mill, the third cold rolling mill, the fourth cold rolling mill, the fifth cold rolling mill and the sixth cold rolling mill are added with rolling oil in the cold rolling process, and the viscosity of the rolling oil is 600-800mm2/s，
The sum of the reduction ratios of six cold rolling passes is 70-80% at most.
As an improvement of the scheme, the tension at the inlet of the first cold rolling mill is 240-260 KN, the tension at the outlet of the first cold rolling mill is 490-650 KN, the rolling force of the first cold rolling mill is 9600-9800 KN, and the rolling speed of the first cold rolling mill is 60-110 m/min;
the tension at the outlet of the second cold rolling mill is 440-700 KN, the rolling force of the second cold rolling mill is 10000-11000 KN, and the rolling speed of the second cold rolling mill is 80-150 m/min;
the tension at the outlet of the third cold rolling mill is 390-650 KN, the rolling force of the third cold rolling mill is 9400-9600 KN, and the rolling speed of the third cold rolling mill is 90-220 m/min;
the tension at the outlet of the fourth cold rolling mill is 340-600 KN, the rolling force of the fourth cold rolling mill is 9100-9350 KN, and the rolling speed of the fourth cold rolling mill is 110-280 m/min;
the tension at the outlet of the fifth cold rolling mill is 310-560 KN, the rolling force of the fifth cold rolling mill is 8900-9100 KN, and the rolling speed of the fifth cold rolling mill is 120-310 m/min;
the tension at the outlet of the sixth cold rolling mill is 230-500 KN, the rolling force of the sixth cold rolling mill is 8700-9000 KN, and the rolling speed of the sixth cold rolling mill is 130-400 m/min.
As an improvement of the scheme, the inlet loop and the outlet loop are at least six layers of large loops which are arranged along the vertical direction.
As an improvement of the scheme, the tension of the inlet loop is 40-50 KN, and the tension of the outlet loop is 20-50 KN.
As an improvement of the scheme, an automatic thickness control system and a plate type control system are arranged in the first cold rolling mill, the second cold rolling mill, the third cold rolling mill, the fourth cold rolling mill, the fifth cold rolling mill and the sixth cold rolling mill and are used for controlling the thickness and the plate type of the stainless steel strip.
Correspondingly, the invention also provides a stainless steel strip which is prepared by the cold rolling method, drying, cleaning, annealing, electrolyzing, pickling, straightening and flattening in sequence.
The implementation of the invention has the following beneficial effects:
(1) the cold rolling method for the stainless steel strip, provided by the invention, can be used for carrying out cold rolling treatment on a stainless steel strip blank with the thickness of 1.0-6.0 mm, wherein the cold rolling treatment is full-continuous six-continuous stainless steel rolling, and has the advantages of high production efficiency, high yield, low production cost per ton of steel, high yield, high efficiency, energy conservation, environmental friendliness and the like.
(2) The cold rolling process is full-continuous six-pass rolling, an annealing process is not required to be inserted in the process, the internal stress generated after the initial rolling is eliminated by accurately controlling the technological parameters of the six-pass cold rolling, the mechanical property of the finished product is improved, the finished product of the stainless steel band with the thickness of 0.2-4 mm and the mirror surface effect of 2B is obtained, the appearance is bright and high-grade, the thickness range is wide, and the requirements of different processing industries on stainless steel bands with different thicknesses are met.
(3) The stainless steel strip finished product has good mechanical property, the yield strength is 350-MPa, the tensile strength is 700-750MPa, the tensile rate is 50-70%, and the hardness is 180 HV.
(4) According to the invention, the viscosity of the rolling oil and the reduction rate of six cold rolling passes are matched, the viscosity of the rolling oil is reduced, the reduction rate of the cold rolling is improved, the thickness of an oil film is reduced, the surface plastic roughening phenomenon after stainless steel rolling is avoided, and the surface roughness of a stainless steel band is reduced, so that a good appearance effect and high surface quality are obtained.
(5) The cold rolling process is provided with the laser welding machine, so that the welding quality and the welding speed can be ensured, the continuous production of a production line is facilitated, and the yield of the steel strip is improved.
(6) The inlet and the outlet of the invention are respectively provided with the inlet loop and the outlet loop, and the loops are six layers of large loops, thereby greatly saving the production space, ensuring the continuous operation of the unit and realizing the continuous production.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention will be described in further detail below.
The invention provides a cold rolling method of a stainless steel strip, which comprises the following steps:
(1) the selected thickness is as follows: 1.0-6.0 mm stainless steel strip blank;
(2) coiling the stainless steel strip blank;
(3) the rolled stainless steel band blanks are transmitted to a laser welding machine through an inlet loop, and laser welding is carried out on different rolled stainless steel band blanks;
the inlet loop is at least six layers of large loops, and the at least six layers of large loops are arranged along the vertical direction, so that the space utilization rate of a production workshop is improved, the continuous operation of a unit is ensured, and the continuous production is realized.
(4) Carrying out first cold rolling on the stainless steel strip blank subjected to laser welding through a first cold rolling mill;
the tension of first cold rolling mill entrance is 240 ~ 260KN, the tension at first cold rolling mill exit is 490 ~ 650KN, the rolling power of first cold rolling mill is 9600 ~ 9800KN, the rolling speed of first cold rolling mill is 60 ~ 110 m/min.
The stainless steel strip blank is subjected to primary cold rolling treatment by adopting smaller tension at an inlet and an outlet of the first cold rolling mill and adopting lower rolling force and lower rolling speed during primary cold rolling. The reduction rate of the first-pass cold rolling is 25-33%, so that a good pressing effect can be achieved, and the difficulty in rolling caused by the high reduction rate of the first-pass cold rolling is avoided.
(5) Carrying out second-pass cold rolling on the stainless steel strip blank subjected to the first-pass cold rolling through a second cold rolling mill;
the tension at the outlet of the second cold rolling mill is 440-700 KN, the rolling force of the second cold rolling mill is 10000-11000 KN, and the rolling speed of the second cold rolling mill is 80-150 m/min. The reduction rate of the second cold rolling is 30-35%.
The second-pass cold rolling performed by the second cold rolling mill is a key point of forming, and in the six-pass cold rolling process, the maximum rolling force and the second slow rolling speed are adopted, so that the internal stress generated in the stainless steel strip after primary rolling can be removed by 60%, the plate shape of the stainless steel strip is effectively improved, the hardness is improved, and the mechanical property of the stainless steel strip is improved.
(6) Carrying out third cold rolling on the stainless steel strip blank subjected to the second cold rolling through a third cold rolling mill;
the tension at the outlet of the third cold rolling mill is 390-650 KN, the rolling force of the third cold rolling mill is 9400-9600 KN, and the rolling speed of the third cold rolling mill is 90-220 m/min.
(7) Carrying out fourth cold rolling on the stainless steel strip blank subjected to the third cold rolling through a fourth cold rolling mill;
the tension at the outlet of the fourth cold rolling mill is 340-600 KN, the rolling force of the fourth cold rolling mill is 9100-9350 KN, and the rolling speed of the fourth cold rolling mill is 110-280 m/min.
(8) Carrying out fifth-pass cold rolling on the stainless steel strip blank subjected to the fourth-pass cold rolling through a fifth cold rolling mill;
the tension at the outlet of the fifth cold rolling mill is 310-560 KN, the rolling force of the fifth cold rolling mill is 8900-9100 KN, and the rolling speed of the fifth cold rolling mill is 120-310 m/min.
(9) Carrying out sixth cold rolling on the stainless steel strip blank subjected to the fifth cold rolling through a sixth cold rolling mill;
the tension at the outlet of the sixth cold rolling mill is 230-500 KN, the rolling force of the sixth cold rolling mill is 8700-9000 KN, and the rolling speed of the sixth cold rolling mill is 130-400 m/min.
And the third cold rolling mill, the fourth cold rolling mill, the fifth cold rolling mill and the sixth cold rolling mill are respectively subjected to third cold rolling, fourth cold rolling, fifth cold rolling and sixth cold rolling, wherein the third cold rolling, the fourth cold rolling, the fifth cold rolling and the sixth cold rolling gradually reduce the tension, reduce the rolling force and simultaneously improve the rolling speed, so that the internal stress generated in the stainless steel strip is completely removed in several times. The sum of the reduction ratios after six times of cold rolling is 70-80% at most.
The first cold rolling mill, the second cold rolling mill, the third cold rolling mill, the fourth cold rolling mill, the fifth cold rolling mill and the sixth cold rolling mill are arranged in series and used for rolling stainless steel bands with different thicknesses at one time. The first cold rolling mill, the second cold rolling mill, the third cold rolling mill, the fourth cold rolling mill, the fifth cold rolling mill and the sixth cold rolling mill realize full continuous six-continuous rolling, an annealing process is not needed to be inserted in the middle, the internal stress generated after primary rolling is eliminated by accurately controlling the technological parameters of six-pass cold rolling, the mechanical property of a finished product is improved, the stainless steel strip finished product with the thickness of 0.2-4 mm and the 2B mirror surface effect is obtained, the appearance is high, the thickness range is wide, and the requirements of different industries on stainless steel strips with different thicknesses are met. Moreover, the full-continuous six-continuous-rolling process has the advantages of high production efficiency, high yield, low production cost per ton of steel, high efficiency, energy conservation, environmental protection and the like.
Further, the first cold rolling mill, the second cold rolling mill, the third cold rolling mill, the fourth cold rolling mill, the fifth cold rolling mill and the sixth cold rolling mill are added with rolling oil in the cold rolling process, and the viscosity of the rolling oil is 600-800mm2And s. The sum of the reduction ratios of six cold rolling passes is 70-80% at most.
According to the invention, the viscosity of the rolling oil and the reduction rate of six cold rolling passes are matched, the viscosity of the rolling oil is reduced, the reduction rate of the cold rolling is improved, the thickness of an oil film is reduced, the surface plastic roughening phenomenon after stainless steel rolling is avoided, and the surface roughness of a stainless steel band is reduced, so that a good appearance effect and high surface quality are obtained. After the viscosity of rolling oil and the reduction rate of six times of cold rolling are matched, the roughness of the finished stainless steel strip is as low as 0.15-0.25 mu m.
(10) Cleaning the stainless steel strip blank subjected to the sixth cold rolling;
the cleaning can adopt a special alkaline degreasing agent, and the special alkaline degreasing agent is brushed by a brush at the temperature of about 80 ℃ and used for removing the surface dirt.
(11) And conveying the cleaned stainless steel strip blank to the next process through an outlet loop, and drying, cleaning, annealing, electrolyzing, pickling, straightening and flattening to obtain a stainless steel strip finished product with the thickness of 0.2-4 mm.
Preferably, the thickness of the finished stainless steel band is 0.3-3 mm.
The outlet loop is at least six layers of large loops which are arranged along the vertical direction. The at least six layers of large sleeves are arranged along the vertical direction, so that the space utilization rate of a production workshop is improved, the continuous operation of a unit is ensured, and the continuous production is realized.
The tension of entry loop is 40 ~ 50KN, the tension of export loop is 20 ~ 50KN, can guarantee the stable transmission of stainless steel band.
Finally, the stainless steel strip finished product prepared by the cold rolling method comprises the following components in percentage by weight:
0.01-0.05% of C, 6.0-9.5% of Ni, 16.5-20.0% of Cr, 0.1-3.0% of Mn, 0.01-0.2% of Cu, 0.15-1.0% of Si, 0.01-0.2% of P, 0.01-0.1% of S, 0.02-0.15% of N, and the balance of Fe and inevitable impurities.
Specifically, 0.01-0.05% of C and 0.15-1.0% of Si can promote austenite formation, stabilize austenite structure, improve the strength of the stainless steel, obtain good forming performance and be suitable for a cold rolling process. And by matching with Mn0.1-3.0% and Ni 6.0-9.5%, austenite can be stabilized, the mechanical property of the stainless steel band can be improved, the forming property of the stainless steel band can be improved, and the method is suitable for a cold rolling process and lays a foundation for obtaining a good plate type subsequently. The stainless steel strip contains 16.5-20.0% of Cr, so that the stainless steel strip has good corrosion resistance. The stainless steel strip contains 0.02-0.15% of N, austenite can be stabilized, and meanwhile, the strength and the corrosion resistance of the stainless steel strip are improved. 0.01-0.2% of Cu, and can reduce the stacking fault energy of an austenite phase and improve the plasticity and the forming performance of the stainless steel band.
Preferably, the stainless steel strip finished product prepared by the cold rolling method comprises the following components in percentage by weight:
0.03-0.04% of C, 7.0-9.0% of Ni, 17.5-19.0% of Cr, 0.5-2.0% of Mn, 0.02-0.08% of Cu0.02, 0.40-0.80% of Si, 0.02-0.05% of P, 0.01-0.05% of S, 0.02-0.06% of N, and the balance of Fe and inevitable impurities.
The mechanical properties of the stainless steel band finished product are as follows:
| item | Numerical value |
| Yield strength | 300-350MPa |
| Tensile strength | 700-750MPa |
| Elongation of stretching | 50-70％ |
| Hardness of | 160-180HV |
| Surface roughness | 0.15-0.25μm |
Furthermore, an automatic thickness control system and a plate type control system are arranged in the first cold rolling mill, the second cold rolling mill, the third cold rolling mill, the fourth cold rolling mill, the fifth cold rolling mill and the sixth cold rolling mill and are used for controlling the thickness and the plate type of the stainless steel strip.
Correspondingly, the invention also provides a stainless steel strip which is prepared by the cold rolling method, drying, cleaning, annealing, electrolyzing, pickling, straightening and flattening in sequence. The drying, cleaning, annealing, electrolysis, pickling, straightening and flattening can be carried out according to the prior art.
The invention is further illustrated by the following specific examples
The working parameters of the first embodiment are as follows:
the preparation method comprises the following steps:
selecting a stainless steel strip blank with a certain thickness;
coiling the stainless steel strip blank;
the rolled stainless steel band blanks are transmitted to a laser welding machine through an inlet loop, and laser welding is carried out on different rolled stainless steel band blanks;
carrying out first cold rolling on the stainless steel strip blank subjected to laser welding through a first cold rolling mill;
carrying out second-pass cold rolling on the stainless steel strip blank subjected to the first-pass cold rolling through a second cold rolling mill;
carrying out third cold rolling on the stainless steel strip blank subjected to the second cold rolling through a third cold rolling mill;
carrying out fourth cold rolling on the stainless steel strip blank subjected to the third cold rolling through a fourth cold rolling mill;
carrying out fifth-pass cold rolling on the stainless steel strip blank subjected to the fourth-pass cold rolling through a fifth cold rolling mill;
carrying out sixth cold rolling on the stainless steel strip blank subjected to the fifth cold rolling through a sixth cold rolling mill;
cleaning the stainless steel strip blank subjected to the sixth cold rolling;
and conveying the cleaned stainless steel strip blank to the next process through an outlet loop, and drying, cleaning, annealing, electrolyzing, pickling, straightening and flattening to obtain a finished stainless steel strip.
And (III) the properties of the finished stainless steel band are as follows:
in conclusion, the fully continuous six-continuous rolling of the invention can improve the mechanical properties of the finished product, the yield strength is 300-350MPa, the tensile strength is 700-750MPa, the tensile rate is 50-70%, the hardness is 160-180HV, and the finished product of the stainless steel band with the thickness of 0.2-4 mm and the 2B mirror surface effect is obtained, the appearance is bright and high-grade, the thickness range is wide, and the requirements of different processing industries on stainless steel bands with different thicknesses are met.
While the invention has been described in connection with what is presently considered to be the most practical and preferred embodiment, it is to be understood that the invention is not to be limited to the disclosed embodiment, but on the contrary, is intended to cover various modifications and equivalent arrangements included within the spirit and scope of the appended claims.
Claims (9)
1. A method for cold rolling a stainless steel strip, comprising:
the selected thickness is as follows: 1.0-6.0 mm stainless steel strip blank;
coiling the stainless steel strip blank;
the rolled stainless steel band blanks are transmitted to a laser welding machine through an inlet loop, and laser welding is carried out on different rolled stainless steel band blanks;
carrying out first cold rolling on the stainless steel strip blank subjected to laser welding through a first cold rolling mill; the tension at the inlet of the first cold rolling mill is 240-260 KN, the tension at the outlet of the first cold rolling mill is 490-650 KN, the rolling force of the first cold rolling mill is 9600-9800 KN, and the rolling speed of the first cold rolling mill is 60-110 m/min;
carrying out second-pass cold rolling on the stainless steel strip blank subjected to the first-pass cold rolling through a second cold rolling mill; the tension at the outlet of the second cold rolling mill is 440-700 KN, the rolling force of the second cold rolling mill is 10000-11000 KN, and the rolling speed of the second cold rolling mill is 80-150 m/min;
carrying out third cold rolling on the stainless steel strip blank subjected to the second cold rolling through a third cold rolling mill; the tension at the outlet of the third cold rolling mill is 390-650 KN, the rolling force of the third cold rolling mill is 9400-9600 KN, and the rolling speed of the third cold rolling mill is 90-220 m/min;
carrying out fourth cold rolling on the stainless steel strip blank subjected to the third cold rolling through a fourth cold rolling mill; the tension at the outlet of the fourth cold rolling mill is 340-600 KN, the rolling force of the fourth cold rolling mill is 9100-9350 KN, and the rolling speed of the fourth cold rolling mill is 110-280 m/min;
carrying out fifth-pass cold rolling on the stainless steel strip blank subjected to the fourth-pass cold rolling through a fifth cold rolling mill; the tension at the outlet of the fifth cold rolling mill is 310-560 KN, the rolling force of the fifth cold rolling mill is 8900-9100 KN, and the rolling speed of the fifth cold rolling mill is 120-310 m/min;
carrying out sixth cold rolling on the stainless steel strip blank subjected to the fifth cold rolling through a sixth cold rolling mill; the tension at the outlet of the sixth cold rolling mill is 230-500 KN, the rolling force of the sixth cold rolling mill is 8700-9000 KN, and the rolling speed of the sixth cold rolling mill is 130-400 m/min;
cleaning the stainless steel strip blank subjected to the sixth cold rolling;
and conveying the cleaned stainless steel strip blank to the next process through an outlet loop, and drying, cleaning, annealing, electrolyzing, pickling, straightening and flattening to obtain a stainless steel strip finished product with the thickness of 0.2-4 mm.
2. The method for cold rolling a stainless steel strip according to claim 1, wherein the stainless steel strip comprises the following components in percentage by weight:
0.01-0.05% of C, 6.0-9.5% of Ni, 16.5-20.0% of Cr, 0.1-3.0% of Mn, 0.01-0.2% of Cu, 0.15-1.0% of Si, 0.01-0.2% of P, 0.01-0.1% of S, 0.02-0.15% of N, and the balance of Fe and inevitable impurities.
3. The cold rolling method for the stainless steel strip as claimed in claim 1, wherein the finished stainless steel strip has a thickness of 0.3-3mm, a yield strength of 300-350MPa, a tensile strength of 700-750MPa, a tensile rate of 50-70%, a hardness of 160-180HV, and a surface roughness of 0.15-0.25 μm.
4. The method for cold rolling a stainless steel strip according to claim 1, wherein the first cold rolling mill, the second cold rolling mill, the third cold rolling mill, the fourth cold rolling mill, the fifth cold rolling mill and the sixth cold rolling mill are arranged in series for rolling stainless steel strips of different thicknesses at one time.
5. The method for cold rolling a stainless steel strip according to claim 1, wherein the first cold rolling mill, the second cold rolling mill, the third cold rolling mill, the fourth cold rolling mill, the fifth cold rolling mill and the sixth cold rolling mill are added with rolling oil during cold rolling, and the viscosity of the rolling oil is 600-800mm2/s ，
The sum of the reduction ratios of six cold rolling passes is at most 80%.
6. The method for cold rolling a stainless steel strip according to claim 1, wherein the inlet and outlet loops are at least six large loops arranged in a vertical direction.
7. The method for cold rolling a stainless steel strip according to claim 6, wherein the inlet loop has a tension of 40 to 50KN, and the outlet loop has a tension of 20 to 50 KN.
8. The method for cold rolling a stainless steel strip according to claim 1, wherein an automatic thickness control system and a strip profile control system are provided in the first cold rolling mill, the second cold rolling mill, the third cold rolling mill, the fourth cold rolling mill, the fifth cold rolling mill and the sixth cold rolling mill for controlling the thickness and the strip profile of the stainless steel strip.
9. A stainless steel strip produced by the cold rolling method for a stainless steel strip according to any one of claims 1 to 8.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811510861.9A CN109530435B (en) | 2018-12-11 | 2018-12-11 | Cold rolling method of stainless steel band and stainless steel band |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811510861.9A CN109530435B (en) | 2018-12-11 | 2018-12-11 | Cold rolling method of stainless steel band and stainless steel band |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN109530435A CN109530435A (en) | 2019-03-29 |
| CN109530435B true CN109530435B (en) | 2020-06-19 |
Family
ID=65854088
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201811510861.9A Active CN109530435B (en) | 2018-12-11 | 2018-12-11 | Cold rolling method of stainless steel band and stainless steel band |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN109530435B (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110328236B (en) * | 2019-07-22 | 2020-11-24 | 镇江龙源铝业有限公司 | Rolling method applied to ultra-long and ultra-narrow aluminum strip |
| CN111112329A (en) * | 2020-01-03 | 2020-05-08 | 江苏贯森新材料科技有限公司 | Cold rolling method for superhard stainless steel |
| CN112404147A (en) * | 2020-11-09 | 2021-02-26 | 江苏苏讯新材料科技股份有限公司 | Waste judgment and repair process in production process of stainless steel strip |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101108394A (en) * | 2007-08-22 | 2008-01-23 | 马鞍山钢铁股份有限公司 | Method of sheet billet continuously casting and rolling to produce thin strip steel coil |
| CN101239357A (en) * | 2008-03-05 | 2008-08-13 | 无锡嘉联不锈钢有限公司 | Method for producing stainless steel band |
| CN106244783A (en) * | 2016-08-11 | 2016-12-21 | 武汉乾冶工程技术有限公司 | A kind of stainless steel strip continuous producing method |
| CN108906888A (en) * | 2018-07-04 | 2018-11-30 | 山西太钢不锈钢股份有限公司 | Stainless-steel cold-rolling strip production equipment |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2003094107A (en) * | 2001-09-21 | 2003-04-02 | Hitachi Ltd | Continuous pickling cold rolling mill and method for operating the same |
-
2018
- 2018-12-11 CN CN201811510861.9A patent/CN109530435B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101108394A (en) * | 2007-08-22 | 2008-01-23 | 马鞍山钢铁股份有限公司 | Method of sheet billet continuously casting and rolling to produce thin strip steel coil |
| CN101239357A (en) * | 2008-03-05 | 2008-08-13 | 无锡嘉联不锈钢有限公司 | Method for producing stainless steel band |
| CN106244783A (en) * | 2016-08-11 | 2016-12-21 | 武汉乾冶工程技术有限公司 | A kind of stainless steel strip continuous producing method |
| CN108906888A (en) * | 2018-07-04 | 2018-11-30 | 山西太钢不锈钢股份有限公司 | Stainless-steel cold-rolling strip production equipment |
Also Published As
| Publication number | Publication date |
|---|---|
| CN109530435A (en) | 2019-03-29 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN109530436B (en) | Cold rolling method of stainless steel band and stainless steel band | |
| CN109530435B (en) | Cold rolling method of stainless steel band and stainless steel band | |
| CN105256323B (en) | The continuous acid-washing method of hot-rolled dual-phase steel | |
| CN100500914C (en) | Method for rolling thick specification low-alloy structure steel plate by using middle and thin plate blank | |
| CN103014445B (en) | 5052 aluminum alloy end stock substrate and production method thereof | |
| CN207026109U (en) | A kind of white skin rolling annealing and pickling unit in new type stainless steel. corrosion resistance arrowband | |
| CN109848212A (en) | A kind of stainless steel belt and its milling method | |
| EP2067541A1 (en) | Method for continuously manufacturing cold-rolled steel | |
| CN113201636A (en) | Method for producing ultrapure ferrite stainless steel by continuous rolling annealing | |
| CN109530437B (en) | Cold rolling method of stainless steel band and stainless steel band | |
| CN101767106A (en) | Hot rolling process of stainless plate strip coil | |
| CN114058958A (en) | High-formability ultrapure ferrite stainless steel and continuous rolling production method thereof | |
| CN114107622B (en) | Production method of cold-rolled nickel-saving austenitic stainless steel 8K mirror surface | |
| CN109530433B (en) | Cold rolling system of stainless steel strip | |
| CN110252804A (en) | The production method of hot continuous rolling production thin gauge ultra-low-carbon steel | |
| CN209647212U (en) | A kind of Cold Rolling System of stainless steel band | |
| CN111020385B (en) | Vanadium-containing hot-rolled pickled plate and pickling method thereof | |
| CN109201738B (en) | Composite rolling preparation method of gradient structure strip | |
| CN105238995A (en) | Hot-rolled pickled plate for hydraulic-formed steel pipe and manufacturing method thereof | |
| CN103100562A (en) | Method of machining special passivated stainless steel surface | |
| CN110773566A (en) | Asynchronous cold continuous rolling method for preparing cold-rolled extremely-thin steel strip | |
| CN114525391B (en) | Production process of high-carbon tool steel cold-rolled sheet | |
| CN108284133B (en) | Ultra-thin steel strip rolling process method for single-stand reversible rolling mill | |
| CN112974523B (en) | Production method of 309S ultrathin precise stainless strip steel for sealing gasket | |
| CN103272841B (en) | Cold rolling technology of stainless steel clad plate strip coil |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |