A PS plate substrate and production method thereof

Abstract

The invention provides a production method of a PS plate base, which comprises the steps of smelting, refining, casting and rolling, rough rolling, finishing rolling and packaging and warehousing. An electromagnetic stirrer is used in the smelting process, and the metal melting rate is adjusted to 18-20% by optimizing and adjusting the frequency of the stirrer; Al-Ti-B-RE is added as a refiner in the refining process to refine the grains of aluminum liquid, and the height of the casting and rolling zone and the liquid level of the front box are matched to refine the grains; the rolling oil used in the finishing rolling process is mixed with 80# base oil and a rolling oil additive to improve the surface quality of the PS plate base; the PS plate base is flat by optimizing the preparation of the rolling oil, controlling the temperature of the rolling oil and optimizing the rolling process, and the PS plate base prepared by the method has excellent mechanical properties.

Description

Technical Field

[0001] The invention relates to a PS plate substrate and a production method thereof. Background Art

[0002] In a broad sense, PS plate refers to a plate that can be printed on the machine without any subsequent processing steps after being exposed and imaged on the direct platemaking equipment. It does not need chemical development, washing, etc. It is a processing-free plate. In a narrow sense, it refers to a plate that does not require chemical development after being exposed and imaged on the direct platemaking machine, but still requires individual non-chemical treatments, such as the removal of plate ablation waste, coating of protective glue, etc.

[0003] PS plate has the advantages of high printing quality, short production cycle, and no environmental pollution. Its application has accelerated the development of lithographic printing towards high speed and multi-color. As a new technology in the printing field, PS plate has put forward higher quality requirements for aluminum substrates for printing. The traditional production method also has the process of over-stretching, bending and straightening, long process flow, low production efficiency, and the materials produced are prone to surface defects such as scratches, poor plate shape, and aluminum powder shedding in the initial processing link, which affects the surface roughness and yield rate of the product. The product is prone to coarse grains during the smelting process; at the same time, the tensile strength and baking strength of the existing PS plate base are not ideal, resulting in a low life of the produced PS plate base. Summary of the invention

[0004] In order to improve the surface quality of the PS substrate, enhance the mechanical properties of the PS substrate and extend the service life of the PS substrate, a PS substrate and a production method thereof are now provided. The specific scheme is as follows:

[0005] A method for producing a PS substrate comprises the following steps:

[0006] S1. Batching: Batching according to the composition of the alloy;

[0007] S2. Melting: Put the raw materials into a melting furnace for melting, use an electromagnetic stirrer for melting during the melting process, and pour them into a holding furnace after the melting is completed;

[0008] S3, refining: adding Al-Ti-B-RE refiner in a holding furnace for refining; the amount of Al-Ti-B-RE refiner added is 2kg-5kg / tAl;

[0009] S4, Casting and rolling: The refined aluminum liquid is continuously cast and rolled, and the aluminum liquid temperature and casting and rolling speed are controlled. The casting and rolling area is controlled at 45-50mm. In order to make the crystal grains uniform and fine during melt crystallization, the front box liquid level of the casting and rolling is controlled to increase by 8-12mm on the basis of meeting the plate width requirements;

[0010] S5, rough rolling: Rough rolling to 1.5-2.0 mm and then cooling for 20-30 hours; control the rolling oil temperature to 40-55°C;

[0011] S6, Finishing rolling: The rolling oil used in the finishing rolling process is prepared by adding 80# base oil to rolling oil additives; the mass fraction of the rolling oil additives is 4% to 5%;

[0012] S7. Packing and warehousing: Pack the aluminum coils after fine rolling and put them into warehouse.

[0013] Preferably, the parameters of the prepared rolling oil are: acid value 0.1-0.2 mgKOH / g, saponification value 6.0-8.0 mgKOH / g, and hydroxyl value 8.0-10.0 mgKOH / g.

[0014] In order to increase the melting rate of the metal, an electromagnetic stirrer is used for stirring during smelting, and the frequency of the electromagnetic stirrer is adjusted to 40 to 50 Hz.

[0015] Preferably, the alloy is any one of 1050, 1060 or 1070 alloys.

[0016] Preferably, the temperature of the aluminum liquid in S4 casting is controlled at 680-690°C.

[0017] Preferably, the casting speed is controlled at 650-750 mm / min.

[0018] Preferably, the rough rolling speed in S5 is 500-600 m / min.

[0019] The tensile strength of the PS substrate prepared by the above method is 190-200 MPa, the elongation is 10-15%, and the tensile strength after baking resistance test is 188-199 MPa; the number of waves is ≤1 / 5m, and the peak value of the middle wave is ≤0.5mm.

[0020] Beneficial effects:

[0021] (1) The present invention provides a method for producing a PS plate substrate, including smelting, refining, casting and rolling, rough rolling, finishing rolling and packaging and warehousing. An electromagnetic stirrer is used in the smelting process, and the frequency of the stirrer is optimized and adjusted so that the metal melting rate is adjusted to 18-20%. Al-Ti-B-RE is added as a refiner in the refining process to refine the aluminum liquid grains. The amount of Al-Ti-B-RE added as a refiner is optimized and adjusted while coordinating the height of the casting and rolling zone and the liquid level of the front box. After casting and rolling, since rare earth elements are surface active substances, they are easily adsorbed and aggregated on the interface and phase plane of aluminum, filling the defects on the crystal plane, thereby hindering the aggregation of TiB2 and TiAl3, and playing a role in refining TiB2 and TiAl3.

[0022] (2) The present invention provides a method for producing a PS plate base, wherein 80# base oil and rolling oil additives are mixed and formulated during the finishing rolling process, wherein the mass fraction of the rolling oil additive is 4% to 5%. The rolling oil has good cooling performance and can form an oil film on the surface of the aluminum plate and strip, so that the surface of the aluminum plate and strip has a higher degree of smoothness and the color of the aluminum plate surface is uniform.

[0023] (3) In the production method of the PS base, the obtained PS base is smooth by optimizing the rolling oil formulation, controlling the rolling oil temperature and optimizing the rolling process. At the same time, compared with the traditional production method, the present method omits the process of over-stretching and bending correction, shortens the process flow and improves production efficiency.

[0024] (4) The PS substrate prepared by the method is subjected to performance testing, and the tensile strength of the PS substrate is 190-200 MPa, the elongation is 10-15%, and the tensile strength after baking resistance test is 188-199 MPa; the number of waves is ≤1 / 5m, and the peak value of the middle wave is ≤0.5mm, which improves the service life of the PS substrate. DETAILED DESCRIPTION

[0025] In order to deepen the understanding of the present invention, the present invention will be further described in detail below in conjunction with examples. The examples are only used to explain the present invention and do not constitute a limitation on the protection scope of the present invention.

[0026] Embodiment 1:

[0027] A method for producing a PS substrate comprises the following steps:

[0028] S1. Ingredients: Ingredients are prepared according to the composition of 1050 alloy;

[0029] S2. Melting: Put the raw materials into the melting furnace for melting. During the melting process, an electromagnetic stirrer is used for melting. The frequency of the electromagnetic stirrer is set to 45 Hz. After the melting is completed, the raw materials are poured into the holding furnace. By adjusting the frequency of the electromagnetic stirrer to 45 Hz, the metal melting rate is increased by 19%;

[0030] S3, refining: adding Al-Ti-B-RE refiner in a holding furnace for refining; the addition amount of Al-Ti-B-RE refiner is 2kg / tAl;

[0031] S4, Casting and rolling: The refined aluminum liquid is continuously cast and rolled, and the aluminum liquid temperature and casting and rolling speed are controlled. The casting and rolling area is controlled at 48mm, and the front box liquid level of the casting and rolling is controlled to meet the plate width requirements and increase by 8mm;

[0032] S5, rough rolling: Rough rolling to 1.6mm and then cooling for 20h; control the rolling oil temperature to 42℃ and the rough rolling speed to 500m / min;

[0033] S6, finishing rolling: the ratio of 80# base oil to rolling oil is 4%, and the parameters of the prepared rolling oil are acid value: 0.13mgKOH / g, saponification value: 6.5mgKOH / g, hydroxyl value: 8.7mgKOH / g;

[0034] S7. Packing and warehousing: Pack the aluminum coils after fine rolling and put them into warehouse.

[0035] The PS substrate prepared in Example 1 was tested for performance, and the results are as follows:

[0036] Example 1 tensile strength Elongation Wave number Peak value of medium wave 195MPa 10％ 1pc / 5m 0.3mm

[0037] The tensile strength of the PS base after the baking test is 193MPa.

[0038] Embodiment 2:

[0039] A method for producing a PS substrate comprises the following steps:

[0040] S1. Ingredients: Ingredients are prepared according to the composition of 1060 alloy;

[0041] S2. Melting: Put the raw materials into the melting furnace for melting. During the melting process, an electromagnetic stirrer is used for melting. The frequency of the electromagnetic stirrer is set to 48 Hz. After the melting is completed, the raw materials are poured into the holding furnace. By adjusting the frequency of the electromagnetic stirrer to 48 Hz, the metal melting rate is increased by 18%;

[0042] S3, refining: adding Al-Ti-B-RE refiner in a holding furnace for refining; the addition amount of Al-Ti-B-RE refiner is 3kg / tAl;

[0043] S4, Casting and rolling: The refined aluminum liquid is continuously cast and rolled, and the aluminum liquid temperature and casting and rolling speed are controlled. The casting and rolling area is controlled at 43mm, and the front box liquid level of the casting and rolling is controlled to meet the plate width requirements and increase by 10mm;

[0044] S5, rough rolling: Rough rolling to 1.8mm and then cooling for 24h; control the rolling oil temperature to 45℃; the rough rolling speed is 550m / min;

[0045] S6, finishing rolling: the ratio of 80# base oil to rolling oil is 4%, and the parameters of the prepared rolling oil are acid value: 0.15mgKOH / g, saponification value: 7.2mgKOH / g, hydroxyl value:

[0046] 9.3mgKOH / g;

[0047] S7. Packing and warehousing: Pack the aluminum coils after fine rolling and put them into warehouse.

[0048] The PS substrate prepared in Example 1 was tested for performance, and the results are as follows:

[0049] Example 2 tensile strength Elongation Wave number Peak value of medium wave 195MPa 12％ 1pc / 6m 0.3mm

[0050] The tensile strength of the PS base after the baking test is 193MPa.

[0051] Embodiment 3:

[0052] A method for producing a PS substrate comprises the following steps:

[0053] S1. Ingredients: Ingredients are prepared according to the composition of 1060 alloy;

[0054] S2. Melting: Put the raw materials into the melting furnace for melting. During the melting process, an electromagnetic stirrer is used for melting. The frequency of the electromagnetic stirrer is set to 40 Hz. After the melting is completed, the raw materials are poured into the holding furnace. By adjusting the frequency of the electromagnetic stirrer to 40 Hz, the metal melting rate is increased by 18%;

[0055] S3, refining: adding Al-Ti-B-RE refiner in a holding furnace for refining; the addition amount of Al-Ti-B-RE refiner is 4kg / tAl;

[0056] S4, Casting and rolling: The refined aluminum liquid is continuously cast and rolled, and the aluminum liquid temperature and casting and rolling speed are controlled. The casting and rolling area is controlled at 47mm, and the front box liquid level of the casting and rolling is controlled to meet the plate width requirements and increase by 9mm;

[0057] S5, rough rolling: Rough rolling to 1.9mm and then cooling for 28h; control the rolling oil temperature to 42℃; the rough rolling speed is 550m / min;

[0058] S6, finishing rolling: the ratio of 80# base oil to rolling oil is 4%, and the parameters of the prepared rolling oil are acid value: 0.18mgKOH / g, saponification value: 6.9mgKOH / g, hydroxyl value: 8.8mgKOH / g;

[0059] S7. Packing and warehousing: Pack the aluminum coils after fine rolling and put them into warehouse.

[0060] The PS substrate prepared in Example 1 was tested for performance, and the results are as follows:

[0061] Example 3 tensile strength Elongation Wave number Peak value of medium wave 192MPa 14％ 1pc / 7m 0.2mm

[0062] The tensile strength of the PS base after the baking test is 190MPa.

[0063] Embodiment 4:

[0064] A method for producing a PS substrate comprises the following steps:

[0065] S1. Ingredients: Ingredients are prepared according to the composition of 1070 alloy;

[0066] S2. Melting: Put the raw materials into the melting furnace for melting. During the melting process, an electromagnetic stirrer is used for melting. The frequency of the electromagnetic stirrer is set to 45 Hz. After the melting is completed, the raw materials are poured into the holding furnace. By adjusting the frequency of the electromagnetic stirrer to 45 Hz, the metal melting rate is increased by 19%;

[0067] S3, refining: adding Al-Ti-B-RE refiner in a holding furnace for refining; the addition amount of Al-Ti-B-RE refiner is 5kg / tAl;

[0068] S4, Casting and rolling: The refined aluminum liquid is continuously cast and rolled, and the aluminum liquid temperature and casting and rolling speed are controlled. The casting and rolling area is controlled at 43mm, and the front box liquid level of the casting and rolling is controlled to meet the plate width requirements and increase by 10mm;

[0069] S5, rough rolling: Rough rolling to 1.9mm and then cooling for 26h; control the rolling oil temperature to 50℃; the rough rolling speed is 600m / min;

[0070] S6, finishing rolling: the ratio of 80# base oil to rolling oil is 4%, and the parameters of the prepared rolling oil are acid value: 0.16mgKOH / g, saponification value: 7.4mgKOH / g, hydroxyl value:

[0071] 9.6mgKOH / g;

[0072] S7. Packing and warehousing: Packing and warehousing the aluminum coils after fine rolling.

[0073] The PS substrate prepared in Example 1 was tested for performance, and the results are as follows:

[0074] Example 4 tensile strength Elongation Wave number Peak value of medium wave 195MPa 12％ 1pc / 5m 0.4mm

[0075] The tensile strength of the PS base after the baking test is 193MPa.

[0076] In summary, through the performance test of the PS substrate prepared by this method, the tensile strength of the PS substrate is 190-200 MPa, the elongation is 10-15%, and the tensile strength after the baking resistance test is 188-199 MPa; the number of waves is ≤1 / 5m, and the peak value of the medium wave is ≤0.5mm.

[0077] As a further improvement, the above is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A method for producing a PS substrate, characterized in that: The following steps are involved: S1. Batching: Batching according to the composition of the alloy; S2. Melting: Put the raw materials into a melting furnace for melting, use an electromagnetic stirrer for melting during the melting process, and pour them into a holding furnace after the melting is completed; S3, refining: adding Al-Ti-B-RE refiner in a holding furnace for refining; the amount of Al-Ti-B-RE refiner added is 2kg-5kg / tAl; S4, Casting and rolling: The refined aluminum liquid is continuously cast and rolled, and the aluminum liquid temperature and casting and rolling speed are controlled. The casting and rolling area is controlled at 45-50mm, and the front box liquid level of the casting and rolling is controlled to increase by 8-12mm on the basis of meeting the plate width requirements; S5, rough rolling: Rough rolling to 1.5-2.0 mm and then cooling for 20-30 hours; control the rolling oil temperature to 40-55°C; S6, Finishing rolling: The rolling oil used in the finishing rolling process is prepared according to the ratio of 80# base oil and rolling oil additive; S7, packaging and storage: packaging and storage of the aluminum coils after fine rolling; The tensile strength of the PS substrate is 190-200 MPa, the elongation is 10-15%, and the tensile strength after the baking resistance test is 188-199 MPa; The number of base waves of the PS plate is ≤1 / 5m, and the peak value of the middle wave is ≤0.5mm.

2. The method for producing a PS substrate according to claim 1, wherein: The mass fraction of the rolling oil additive is 4% to 5%.

3. The method for producing a PS substrate according to claim 1, characterized in that: The parameters of the prepared rolling oil are as follows: acid value 0.1-0.2 mgKOH / g, saponification value 6.0-8.0 mgKOH / g, and hydroxyl value 8.0-10.0 mgKOH / g.

4. The method for producing a PS substrate according to claim 1, characterized in that: The frequency of the electromagnetic stirrer is 40-50 Hz.

5. The method for producing a PS substrate according to claim 1, characterized in that: The alloy is any one of 1050, 1060 or 1070 alloys.

6. The method for producing a PS substrate according to claim 1, characterized in that: During S4 casting and rolling, the temperature of the molten aluminum is controlled at 680-690°C.

7. The method for producing a PS substrate according to claim 1, characterized in that: The casting and rolling speed is controlled at 650-750 mm / min.

8. The method for producing a PS substrate according to claim 1, characterized in that: S5 rough rolling speed is 500-600m / min.