CN-122007161-A - Preparation method of metal ultrathin belt with snowflake array structure

CN122007161ACN 122007161 ACN122007161 ACN 122007161ACN-122007161-A

Abstract

The invention discloses a preparation method of a metal ultrathin strip with a snowflake array structure, which belongs to the technical field of preparation of metal ultrathin strips and comprises the processes of cutting, heat treatment before rolling, cleaning, roller laser etching, roller cleaning and rolling of a metal substrate. According to the preparation method of the metal ultrathin strip with the snowflake array structure, the snowflake-shaped hydrophobic microstructure on the surface is adopted in the process of rolling the metal ultrathin strip, so that the contact condition and self-cleaning performance of a rolling interface are improved, the snowflake-shaped hydrophobic microstructure on the surface of the roller is beneficial to stable residence and uniform distribution of rolling lubricant in the microstructure to form an effective lubrication isolation layer, the interface friction resistance and the surface damage risk are reduced, the common surface pits, scratches and bonding roller defects of the rolled metal ultrathin strip are effectively inhibited, the surface finish and quality consistency of a product are remarkably improved, and the reliable guarantee is provided for realizing continuous production of the high-quality metal ultrathin strip.

Inventors

ZHI CHENCHEN
LI KAI
WANG TIANXIANG
ZHANG WEI
LIU SONG
MA LIFENG

Assignees

太原科技大学

Dates

Publication Date: 20260512
Application Date: 20260312

Claims (9)

1. A preparation method of a metal ultrathin belt with a snowflake array structure is characterized by comprising the following steps of: s1, cutting a metal substrate; S2, placing the metal substrate of the S1 into an annealing furnace and carrying out annealing treatment; s3, cleaning the annealed metal substrate; s4, preprocessing the working surface of a roller for rolling the metal substrate; S5, etching the pretreated working surface of the roller obtained in the S4; s6, cleaning the etched roller surface; And S7, mounting the cleaned roller in a double-roller mill, penetrating the metal base material cleaned in the S3 into the double-roller mill, and carrying out rolling processing to obtain the metal ultrathin belt with the snowflake-shaped array structure.
2. The method for preparing the metal ultrathin belt with the snowflake array structure, which is characterized in that S1 is specifically implemented by cutting a common metal ultrathin belt to obtain a metal base material, cutting the metal base material by using cutting equipment, wherein the thickness of the metal base material is 0.8-1.2mm, and the width of the metal base material is 5-15cm.
3. The method for producing a very thin metal strip having a snowflake-like array structure according to claim 1, wherein in S2, the annealing temperature is 880-920 ℃, the annealing time is 1-3 hours, and the annealing temperature is cooled to 25+ -5 ℃ with a furnace.
4. The method for producing a metal ultrathin strip having a snowflake-like array structure according to claim 1, wherein: in S3, the surface cleaning material is alloy No. 4J 36.
5. The method of claim 1, wherein S4 is specifically performed by detaching the roll to be treated from the twin-roll mill and performing deep cleaning to remove oil stains, metal scraps and residues on the surface of the roll.
6. The method for preparing the metal ultrathin belt with the snowflake-shaped array structure, which is characterized by comprising the specific operation S5 of carrying out controllable laser etching processing on the pretreated working surface of the roller by using high-precision laser equipment, carrying out accurate positioning scanning on the surface of the roller by using laser beams according to a preset micro-geometry, and etching the designed micro-geometry by ablation.
7. The method of claim 6, wherein S5 is a snowflake array structure, the etching solution is ferric chloride solution, the solution concentration is controlled at 38 DEG Be-42 DEG Be, and the nozzle pressure is controlled at 0.4MPa.
8. The method of claim 1, wherein S6, the etched roller is cleaned of molten splatter, oxide layer and residues generated during etching process by selective chemical cleaning, and the selective chemical cleaning agent is alkaline degreasing cleaner.
9. The method for preparing the metal ultrathin strip with the snowflake-shaped array structure, which is characterized in that in S7, rolling parameters are that the rolling reduction of the first pass is controlled to be 20-30%, the rolling reduction of the middle pass is controlled to be 15-25%, the rolling reduction of the final pass is controlled to be 10-15%, intermediate annealing is needed after each pass, the metal ultrathin strip is heated to 890-910 ℃ under the protection of inert gas for 0.5-2 h, and the metal ultrathin strip is cooled to 25+/-5 ℃ along with a furnace.

Description

Preparation method of metal ultrathin belt with snowflake array structure Technical Field The invention relates to the technical field of preparation of metal ultrathin strips, in particular to a preparation method of a metal ultrathin strip with a snowflake array structure. Background With the rapid development of precision machinery and electronics industry, surface structures with specific features and shapes are widely and deeply applied in various fields such as aerospace, automobile manufacturing, high-end equipment and the like. Among them, snowflake-like surface structures are particularly attractive, and the unique multi-level fractal characteristics can endow materials with excellent superhydrophobic, anti-icing, drag reduction and other properties, which are of significant value in situations where strict requirements for resistance to liquid penetration, icing or flow resistance are imposed. Particularly in the precision fields of electronic equipment, sensors and the like, the surface plays a key role in guaranteeing the stable operation and performance improvement of equipment by virtue of the excellent functionality. At present, the preparation of snowflake-shaped surface structures mainly depends on high-precision technologies such as laser etching, electron beam lithography, nanoimprint and the like. While these methods are capable of achieving the desired complex topography, they are often highly dependent on specific pre-formed templates or masks, which not only significantly increases the complexity of the process steps, but also increases the production costs and limits the processing efficiency, thus making it difficult to meet the demands of large scale mass production. In this context, it is critical to find efficient, low cost manufacturing schemes. Conventional micro-forming techniques such as micro-stamping are considered as a potential alternative. However, such techniques often place stringent demands on very thin strips when attempting to directly form highly complex and fine snowflake-like surfaces. This not only presents a very high challenge for precision control of the equipment and the mold, resulting in complex handling and low fault tolerance, but also longer forming cycles. More importantly, such processes are more prone to the fabrication of discrete micro-pieces, and it is difficult to efficiently and widely construct highly ordered and structurally uniform arrays of snowflake-like surfaces directly on a metal ribbon substrate. Disclosure of Invention The invention aims to provide a preparation method of a metal ultrathin belt with a snowflake array structure, which improves the surface quality of the metal ultrathin belt, improves the production efficiency, overcomes the limitation of the prior art by optimizing the surface structure, and opens up a new way for high-quality production of the snowflake array. In order to achieve the above object, the present invention provides a method for preparing a metal ultrathin strip having a snowflake-like array structure, comprising the steps of: s1, cutting a metal substrate; S2, placing the metal substrate of the S1 into an annealing furnace and carrying out annealing treatment; s3, cleaning the annealed metal substrate; s4, preprocessing the working surface of a roller for rolling the metal substrate; S5, etching the pretreated working surface of the roller obtained in the S4; s6, cleaning the etched roller surface; And S7, mounting the cleaned roller in a double-roller mill, penetrating the metal base material cleaned in the S3 into the double-roller mill, and carrying out rolling processing to obtain the metal ultrathin belt with the snowflake-shaped array structure. Preferably, the specific operation of S1 is that the common metal ultrathin belt is cut to obtain a metal base material, and the metal base material is cut by using cutting equipment, wherein the thickness of the metal base material is 0.8-1.2mm, and the width of the metal base material is 5-15cm. Preferably, in S2, the annealing temperature is 880-920 ℃, the annealing time is 1-3h, and the annealing temperature is cooled to 25+/-5 ℃ along with the furnace. Preferably, in S3, the surface cleaning material is alloy No. 4J 36. Preferably, the specific operation of S4 is to detach the roll to be treated from the twin-roll mill and to perform deep cleaning to remove the oil, metal chips and residues from the surface of the roll. Preferably, the specific operation of the S5 is that a high-precision laser device is used for carrying out controllable laser etching processing on the pretreated working surface of the roller, and according to a preset microscopic geometry, a laser beam is utilized for carrying out accurate positioning scanning on the surface of the roller, and the designed microscopic geometry is etched through ablation. Preferably, in S5, the preset micro-geometry structure is a snowflake array structure, the etching solution is ferric trichloride sol