CN115156294A - Low-expansion alloy 4J36 precision foil and control method of high-precision surface thereof - Google Patents
Low-expansion alloy 4J36 precision foil and control method of high-precision surface thereof Download PDFInfo
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- CN115156294A CN115156294A CN202210968271.0A CN202210968271A CN115156294A CN 115156294 A CN115156294 A CN 115156294A CN 202210968271 A CN202210968271 A CN 202210968271A CN 115156294 A CN115156294 A CN 115156294A
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- 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
- B21B1/40—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 foils which present special problems, e.g. because of thinness
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- 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
- B21B27/02—Shape or construction of rolls
- B21B27/021—Rolls for sheets or strips
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- 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
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- 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
- B21B37/16—Control of thickness, width, diameter or other transverse dimensions
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- 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
- B21B37/58—Roll-force control; Roll-gap control
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Abstract
The invention belongs to the technical field of stainless steel surface treatment, and particularly relates to a low-expansion alloy 4J36 precision foil and a control method of a high-precision surface thereof. According to the control method for the high-precision surface of the low-expansion alloy 4J36 precision foil, in the finished product rolling process, the working roll with the roughness of Ra0.4-0.5um is used in the first five passes, the texturing roll with the roughness of Ra 0.3-0.4um is used in the last but one pass, and the polishing roll with the roughness of Ra less than or equal to 0.08um is used in the finished product pass. The invention realizes the high-precision surface control of the low-expansion alloy 4J36 precision foil with the thickness of less than 0.05mm and meets the precision etching processing requirements of the OLED display screen industry.
Description
Technical Field
The invention belongs to the technical field of stainless steel surface treatment, and particularly relates to a low-expansion alloy 4J36 precision foil and a control method of a high-precision surface thereof.
Background
The low expansion alloy has a significantly reduced coefficient of thermal expansion in the vicinity of the magnetic temperature (i.e., curie point), and exhibits a so-called anomalous thermal expansion phenomenon, so that a small or even nearly zero coefficient of expansion can be obtained over a wide temperature range in the vicinity of room temperature.
The 4J36 low expansion alloy is also called invar alloy, the Curie point of the alloy is about 230 ℃, the alloy is ferromagnetic and has a very low expansion coefficient when the temperature is lower, and the alloy is nonmagnetic and the expansion coefficient is increased when the temperature is higher. The alloy is mainly used for manufacturing elements with approximately constant size in a temperature variation range, and is widely applied to the radio industry, precision instruments, instruments and other industries. The low-expansion alloy 4J36 precision foil is mainly applied to the production of OLED display screens and semiconductor packaging materials, is a base material of a key template FMM in a production line, and also comprises a support system used as a structural part in aerospace remote sensors, precision lasers, optical measurement systems and waveguide tubes, a huge lens in microscopes and astronomical telescopes and various scientific instruments needing to be provided with the lens.
At present, the domestic production of 0.05mm low-expansion alloy 4J36 precision foil products is not reported, the international low-expansion alloy 4J36 precision foil market is checked, japanese enterprises can produce 0.05mm and below 4J36 foils, the thinnest production is 0.03mm, domestic corresponding products all depend on import, and the preparation process of related products is blank at home.
Disclosure of Invention
The invention aims to overcome the defects of the prior art and provides a low-expansion alloy 4J36 precision foil and a control method of a high-precision surface thereof.
In the control method for the high-precision surface of the low-expansion alloy 4J36 precision foil, in the finished product rolling process, the working rolls with the roughness of Ra0.4-0.5um are used in the first five passes, the texturing rolls with the roughness of Ra 0.3-0.4um are used in the last but one pass, and the polishing rolls with the roughness of Ra less than or equal to 0.08um are used in the finished product passes.
According to the control method for the high-precision surface of the low-expansion alloy 4J36 precision foil, in the rolling process of a finished product, the total rolling deformation is more than or equal to 75%, the initial pass is not less than 5 passes, the rolling force is not higher than 500KN, and the rolling speed is not higher than 120m/min.
According to the control method for the high-precision surface of the low-expansion alloy 4J36 precision foil, in the rolling process of the finished product, the two middle rollers adopt a free roller with the diameter of 30-50 micrometers and a driving roller with the diameter of 0-10 micrometers, and the diameter difference of the same roller is less than or equal to 10 micrometers.
According to the control method for the high-precision surface of the low-expansion alloy 4J36 precision foil, in the finished product rolling process, the taper length of an intermediate roller is selected according to the width of a supplied material, and the diameter difference of the same roller is less than or equal to 5 micrometers.
According to the control method for the high-precision surface of the low-expansion alloy 4J36 precision foil, in the primary rolling process, the total primary rolling deformation is more than or equal to 60%, the primary rolling pass is not less than 5 passes, the rolling force is not higher than 600KN, and the rolling speed is not higher than 300m/min.
According to the control method for the high-precision surface of the low-expansion alloy 4J36 precision foil, the diameter of the polishing roller is 25-28mm, and the diameter difference of the same roller is less than 3mm.
The method for controlling the high-precision surface of the low-expansion alloy 4J36 precision foil comprises the following steps: (1) Grinding a D2 roller with the diameter of 28-32mm by using a No. 240 grinding wheel; (2) Polishing the roller after grinding to ensure that the roughness Ra of the roller is less than 0.1um; (3) And carrying out laser texturing treatment on the polished roller to enable the roughness Ra to reach 0.3-0.4um.
On the other hand, the invention also provides a low-expansion alloy 4J36 precision foil which is controlled by adopting the control method of the high-precision surface in the preparation process.
The thickness of the low-expansion alloy 4J36 precision foil is less than or equal to 0.05mm.
The thickness of the low-expansion alloy 4J36 precision foil is less than or equal to 0.03mm.
The technical scheme of the invention has the following beneficial effects:
the control method for the high-precision surface of the low-expansion alloy 4J36 precision foil comprises innovative designs such as control of a texturing roller and a polishing roller, a rolling technology of an extremely-thin precision foil, configuration of a finished rolling system, a use method and the like, realizes high-precision surface control of the low-expansion alloy 4J36 precision foil with the thickness of less than 0.05mm, and meets the requirements of precision etching processing in the OLED display screen industry.
Drawings
Various additional advantages and benefits will become apparent to those of ordinary skill in the art upon reading the following detailed description of the preferred embodiments. The drawings are only for purposes of illustrating the preferred embodiments and are not to be construed as limiting the invention.
FIG. 1 is a surface grain photograph of a low expansion alloy 4J36 precision foil obtained by the method of the present invention;
fig. 2 is a surface grain photograph of the low expansion alloy 4J36 precision foil obtained by a conventional roll finishing process.
Detailed Description
The present invention will be described in detail with reference to the following embodiments in order to fully understand the objects, features and effects of the invention. The process of the present invention employs conventional methods or apparatus in the art, except as described below. The following noun terms have meanings commonly understood by those skilled in the art unless otherwise specified.
The terms "the," "said," "an," and "an" as used herein do not denote a limitation of quantity, but rather denote the presence of at least one of the referenced item. The terms "preferred", "more preferred", and the like, refer to embodiments of the invention that may provide certain benefits under certain circumstances. However, other embodiments may be preferred, under the same or other circumstances. Furthermore, the recitation of one or more embodiments does not imply that other embodiments are not useful, nor is it intended to exclude other embodiments from the scope of the invention.
When a range of values is disclosed herein, the range is considered to be continuous and includes both the minimum and maximum values of the range, as well as each value between such minimum and maximum values. Further, when a range refers to an integer, each integer between the minimum and maximum values of the range is included. Further, when multiple range-describing features or characteristics are provided, the ranges may be combined. In other words, unless otherwise indicated, all ranges disclosed herein are to be understood to encompass any and all subranges subsumed therein.
The invention aims to provide a high-precision surface control method for a low-expansion alloy 4J36 precision foil with the thickness less than or equal to 0.05mm. The term high precision surface as used herein means that the surface of the foil is ensured to have no significant rolling texture while ensuring low roughness (about Ra0.1 um). To achieve the purpose, the inventor of the application develops a multi-pass composite rolling technology for the low-expansion alloy 4J36 precision foil by adopting various rollers through creative labor.
In the control method for the high-precision surface of the low-expansion alloy 4J36 precision foil, in the finished product rolling process, the working rolls with the roughness of Ra0.4-0.5um are used in the first five passes, the texturing rolls with the roughness of Ra 0.3-0.4um are used in the last but one pass, and the polishing rolls with the roughness of Ra less than or equal to 0.08um are used in the finished product passes.
According to the invention, the working rolls with three roughness types are adopted in the rolling process of the finished product, so that the roughness of the low-expansion alloy 4J36 precision foil in the rolling process can be effectively controlled. Particularly, the roughness of the texturing roller is controlled to be between Ra 0.3 and 0.4, so that the high-precision surface of the foil meets the application requirements of the industry.
Preferably, the preparation method of the texturing roller with the roughness of Ra 0.3-0.4um is as follows:
(1) Grinding a D2 roller with the diameter of 28-32mm by using a No. 240 grinding wheel, wherein the quality requirement is the surface requirement of an electroplating roller, namely: the defects of the sand falling print, the spiral print, the vibration print, the tile frame print and the like with hand feeling can not be caused. The diameter tolerance is less than 3um, and the roughness Ra is less than 0.12um.
(2) And polishing the roller after the roller is ground to ensure that the roughness Ra of the roller is less than 0.1um and the surface cannot be scratched.
(3) And carrying out laser texturing treatment on the polished roller to enable the roughness Ra to reach 0.3-0.4um. The surface texture is uniform and disordered, and surface quality defects such as vibration lines, chromatic aberration and the like are not obtained.
Optionally, the roughness of the texturing roll can be adjusted according to different requirements of customers.
Preferably, the polishing roller is a working roller with the diameter range of 25-28mm, the diameter difference requirement of the same roller is less than 3um, and the roughness Ra is within 0.08um, so that the final product requirement effect that no rolling is required after the final product is amplified by 120 times and the roughness is within Ra0.1 can be achieved.
Further preferably, the roughness of the polishing roll can be adjusted according to different requirements of customers.
Wherein, the diameter difference of the same roller refers to the diameter difference of two sides of one roller. It is impossible to ensure that the diameter of each point on the roll is the same during the grinding process of the roll, so the difference between the diameters of the same roll needs to be measured to represent the accuracy of the roll.
Optionally, the preparation method of the working roll with the roughness of Ra0.4-0.5um and the preparation method of the polishing roll with the roughness of Ra less than or equal to 0.08um can be carried out according to the prior art, and the detailed description of the invention is omitted.
In some preferred embodiments, the low expansion alloy 4J36 precision foil of the present invention adopts an extremely thin precision foil rolling technology in the rolling process, which comprises: two rolling processes of initial rolling and finished product rolling.
In the blooming process, the total blooming deformation is more than or equal to 60%, the blooming pass is not less than 5, the rolling force is not higher than 600KN, and the rolling speed is not higher than 300m/min, so that the efficient production and the controllable surface quality of the intermediate rolling pass are ensured.
In the rolling process of the finished product, the total rolling deformation is more than or equal to 75%, the initial rolling pass is not less than 5 passes, the rolling force is not higher than 500KN, and the rolling speed is not higher than 120m/min, so that the plate shape of the finished product is controllable.
Wherein, the initial rolling and the finished product rolling are both carried out in a reversible 20-roller four-column rolling mill.
Further preferably, the roll system configuration and use method of the low expansion alloy 4J36 precision foil in the finished product rolling process comprises the following steps:
(1) Use of two intermediate rolls: because the deformation of the finished product in the rolling process is more than or equal to 75 percent, in order to ensure that the plate shape and the rolling force are controllable and the strip is not broken, the two intermediate rolls adopt a free roll of 30-50um and a driving roll of 0-10um, and the diameter difference of the two intermediate rolls is within 10 um;
wherein, the '30-50 um free roll' and the '0-10 um free roll' mean that the diameter of the cross section at the middle position of the whole roll is respectively 30-50um and 0-10um larger than that of the cross section at the two ends.
(2) Use of an intermediate roll: selecting a middle roller with a corresponding taper length according to the width condition of the supplied materials, wherein the diameter difference of the middle roller and the roller is within 5 um;
optionally, in an embodiment, the incoming material is 600mm wide, and the selected specification of an intermediate roller is: the cone is 130mm long and 210um high.
(3) The working roll is used: all the first 5 passes use the work roll with Ra0.4-0.5um, the second last pass uses the roughening roll with 0.3-0.4um, and the final pass uses the polishing roll with Ra 0.08 um.
The invention discloses a control method of a high-precision surface of a low-expansion alloy 4J36 precision foil, which subdivides a low-expansion alloy 4J36 precision foil high-precision surface control process into: the control of the texturing roller and the polishing roller, the rolling technology of the ultrathin precise foil, the configuration and the use of the finished rolling range roller system realize the high-precision surface control of the low-expansion alloy 4J36 precise foil with low roughness and no texture in the aspects of strict roller use and precision control, the precise foil rolling technology, the roller system configuration and the like through more than 70 percent of deformation, and meet the use requirements of the precise etching processing in the industry.
On the other hand, the invention also provides a low-expansion alloy 4J36 precision foil which is controlled by adopting the control method of the high-precision surface in the preparation process.
Wherein the thickness of the low-expansion alloy 4J36 precision foil is less than or equal to 0.05mm (preferably less than or equal to 0.03 mm).
The surface condition of the low-expansion alloy 4J36 precision foil is checked under the condition of 100 times magnification, and the low-expansion alloy foil is low in surface roughness and free of texture. Based on the rolling process of the ultrathin stainless precision foil, the requirement of the organization structure size of the precision etching processing in the industry is met, and the blank of the domestic special alloy foil industry is filled.
Examples
The invention is further illustrated by the following examples, which are not intended to limit the scope of the invention. Experimental procedures without specifying specific conditions in the following examples were carried out according to conventional methods and conditions.
Example 1
The thickness of the strip material adopted in the primary rolling process is 0.25mm, the thickness of the primary rolling target is 0.10mm, the rolling passes are 6, and the rolling technological parameters of each pass are as follows:
the target thickness of the finished product in the rolling process is 0.025mm, 7 passes of rolling are adopted, and the process parameters of each rolling pass are as follows:
in the finished product rolling process, the working roll using process is as follows: all the first 5 passes use the work roll with Ra0.4-0.5um, the second last pass uses the roughening roll with 0.3-0.4um, and the final pass uses the polishing roll with Ra 0.08 um.
During the final rolling, the incoming width tested was 580mm, using an intermediate cone length of 130 x 210; the diameter difference of the same roller is 6un, and the diameter difference of the same roller between the two middle rollers is 8um.
After the rolling process of the finished product is finished, the surface condition of the low-expansion alloy 4J36 precision foil is checked under the condition of 100 times magnification, and the surface roughness is low without texture (as shown in figure 1)
Comparative example
The rolling of the low expansion alloy 4J36 precision foil with the conventional surface is mainly different from the rolling of the low expansion alloy 4J36 precision foil with the non-texture surface in that a working roll is used, for example, a roll with 5 passes, all coarse rolls with Ra0.4 are used in the first 4 passes, and fine rolls with Ra 0.2 are used in the finished product. Repeated process tests show that the surface roughness of the wafer is high, the wafer has obvious textures (as shown in figure 2), and the use requirement of precision etching processing in the industry cannot be met.
The present invention has been disclosed in the foregoing in terms of preferred embodiments, but it will be understood by those skilled in the art that these embodiments are merely illustrative of the present invention and should not be construed as limiting the scope of the present invention. It should be noted that all changes and substitutions that are equivalent to these embodiments are deemed to be within the scope of the claims of the present invention. Therefore, the protection scope of the present invention should be subject to the scope defined in the claims.
Claims (10)
1. A control method for the high-precision surface of a low-expansion alloy 4J36 precision foil is characterized in that in the finished product rolling process, a working roll with the roughness of Ra0.4-0.5um is used in the first five passes of the working roll, a texturing roll with the roughness of Ra 0.3-0.4um is used in the last but one pass of the working roll, and a polishing roll with the roughness of Ra less than or equal to 0.08um is used in the finished product pass.
2. The method for controlling the high-precision surface of the low-expansion alloy 4J36 precision foil as claimed in claim 1, wherein in the finished product rolling process, the total rolling deformation is more than or equal to 75%, the initial pass is not less than 5, the rolling force is not more than 500KN, and the rolling speed is not more than 120m/min.
3. The method for controlling the high-precision surface of the low-expansion alloy 4J36 precision foil as claimed in claim 2, wherein in the finished product rolling process, a free roller of 30-50um and a driving roller of 0-10um are adopted as two intermediate rollers, and the diameter difference of the same roller is less than or equal to 10um.
4. The method for controlling the high-precision surface of the low-expansion alloy 4J36 precision foil as claimed in claim 2, wherein in the finished product rolling process, the taper length of an intermediate roll is selected according to the incoming material width, and the diameter difference of the same roll is less than or equal to 5um.
5. The method for controlling the high-precision surface of the low-expansion alloy 4J36 precision foil as claimed in claim 1, wherein in the primary rolling process, the total primary rolling deformation is more than or equal to 60%, the primary rolling pass is not less than 5 passes, the rolling force is not more than 600KN, and the rolling speed is not more than 300m/min.
6. The method for controlling the high-precision surface of the low-expansion alloy 4J36 precision foil as claimed in claim 1, wherein the diameter of the polishing roller is 25-28mm, and the diameter difference of the same roller is less than 3mm.
7. The method for controlling the high-precision surface of the low-expansion alloy 4J36 precision foil as claimed in claim 1, wherein the preparation method of the texturing roller comprises the following steps: (1) Grinding a D2 roller with the diameter of 28-32mm by using a No. 240 grinding wheel; (2) Polishing the roller after grinding to ensure that the roughness Ra of the roller is less than 0.1um; (3) And carrying out laser texturing treatment on the polished roller to enable the roughness Ra to reach 0.3-0.4um.
8. A low expansion alloy 4J36 precision foil characterized in that the control method of the high precision surface according to any one of claims 1 to 7 is used for control during the preparation process.
9. The low-expansion alloy 4J36 precision foil as claimed in claim 8, wherein the thickness of the low-expansion alloy 4J36 precision foil is less than or equal to 0.05mm.
10. The low-expansion alloy 4J36 precision foil as claimed in claim 8, wherein the thickness of the low-expansion alloy 4J36 precision foil is less than or equal to 0.03mm.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210968271.0A CN115156294A (en) | 2022-08-12 | 2022-08-12 | Low-expansion alloy 4J36 precision foil and control method of high-precision surface thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN202210968271.0A CN115156294A (en) | 2022-08-12 | 2022-08-12 | Low-expansion alloy 4J36 precision foil and control method of high-precision surface thereof |
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| CN115156294A true CN115156294A (en) | 2022-10-11 |
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| CN202210968271.0A Pending CN115156294A (en) | 2022-08-12 | 2022-08-12 | Low-expansion alloy 4J36 precision foil and control method of high-precision surface thereof |
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- 2022-08-12 CN CN202210968271.0A patent/CN115156294A/en active Pending
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