WO2023050510A1

WO2023050510A1 - Method for rolling 1050 aluminum/08al steel composite sheet

Info

Publication number: WO2023050510A1
Application number: PCT/CN2021/126669
Authority: WO
Inventors: 周峰; 吴开明; 周庆
Original assignee: 材谷金带(佛山)金属复合材料有限公司; 佛山职业技术学院
Priority date: 2021-09-28
Filing date: 2021-10-27
Publication date: 2023-04-06
Also published as: CN114101327A

Abstract

A method for rolling a 1050 aluminum/08AL steel composite sheet, comprising: S1), placing a rolled aluminum coil and a rolled steel coil on two uncoilers for uncoiling, respectively; S2), after the uncoiling, using NaOH and HCl solutions for cleaning, respectively; S3), performing mechanical treatment on surfaces to be combined of the aluminum sheet and the steel sheet for 10-15s by using a rotating steel wire brush method; S4), placing the aluminum sheet and the steel sheet in an acetone solution for ultrasonic cleaning for 2-3min; S5), pre-stretching or pre-compressing the aluminum sheet and steel sheet subjected to surface treatment; S6), welding edges of the pre-stressed aluminum sheet and steel sheet; S7) preheating the welded steel sheet and aluminum sheet before rolling, and then performing hot rolling compounding; and S8) performing annealing treatment in a continuous annealing furnace. According to the described method, the metallic aluminum sheet and steel sheet are combined together by means of hot rolling compounding, the interfacial shear strength is greater than or equal to 90 MPa, and the number of repeated bending times is greater than or equal to 10.

Description

A kind of rolling method of 1050 aluminum/08AL steel composite plate

technical field

The invention relates to the technical field of composite plates, in particular to a rolling method of 1050 aluminum/08AL steel composite plates.

Background technique

With the rapid development of science and technology, the world's new technological revolution based on the three major disciplines of information, life, and materials is currently in full swing. It has pushed human material civilization to a new stage of development. Materials science, one of the major basic disciplines, will take on an important new historical mission.

The research and preparation of composite materials is an important trend in the development of the material industry in recent years. With the continuous development of science and technology, each industry has increasingly high requirements for the comprehensive performance of materials, and a single material can no longer meet the requirements of high indicators and high performance. Layered metal composite material is a new type of material prepared by using composite technology to make two or more metals with different physical, chemical and mechanical properties realize firm metallurgical bonding at the interface. Although each layer of metal still maintains its original characteristics, the physical, chemical and mechanical properties of layered metal composites are much superior to those of single metals, and the composite boards obtained have comprehensive properties that cannot be possessed by any component.

With the advancement of science and technology, they are not only more widely used in the scope of application, but also break through the traditional understanding in terms of material performance combination and optimal utilization. The effective combination of electrical conductivity, thermal conductivity, corrosion resistance and mechanical properties not only improves the overall performance of the material, but also provides better conditions for reasonable material selection and cost reduction. Due to its unique properties, bimetallic composites have attracted more and more attention, especially in the fields of aviation, aerospace, national defense, transportation, electronics and communications.

In recent years, steel and aluminum composite materials have emerged at home and abroad. The kitchen utensils made of this material not only retain the beautiful appearance of steel products, but also greatly improve thermal conductivity and light weight. It combines the high strength of steel, easy cleaning and aluminum It has been widely used in various fields due to its light weight, low price, excellent electrical conductivity and thermal conductivity, and has been widely used in various fields such as industry and civil use, and has an excellent market prospect. Rolling cladding is a very potential preparation and processing method for large-scale production of steel/aluminum clad panels.

Contents of the invention

Aiming at the deficiencies of the prior art, the present invention provides a rolling method of 1050 aluminum/08AL steel composite plate, and the plate prepared by the present invention has high interface strength.

The technical solution of the present invention is: a rolling method of 1050 aluminum/08AL steel composite plate, comprising the following steps:

S1), the rolled 1050 aluminum coil and the 08AL steel coil are respectively placed on two uncoilers for decoiling;

S2), the surface of the 08AL steel plate after uncoiling is cleaned with 8-15% HCl solution, the 1050 aluminum plate is cleaned with 10-12% NaOH solution, and then the residual HCl and NaOH solution and products on the surface are removed in clean water, and squeezed out with a roller squeeze out the water;

S3), the 1050 aluminum plate and the 08AL steel plate to be bonded surface processed in step S2) are mechanically treated for 10-15s by the rotating wire brush method, and the grinding direction is along the rolling direction of the composite plate;

S4), then place the 1050 aluminum plate and 08AL steel plate treated in step S3) in an acetone solution for ultrasonic cleaning for 2-3 minutes, and then blow and dry them with hot air after coming out;

S5), the surface-treated 1050 aluminum plate and 08AL steel plate are pre-stretched or pre-compressed according to their metal properties, and the stretching and compression directions are along the rolling direction and vertical rolling direction;

S6), welding the edge of the 1050 aluminum plate and 08AL steel plate prestressed in step S5);

S7), the welded 1050 aluminum plate and 08AL steel plate are preheated before rolling, and the preheating temperature is 400°C-500°C; after the 1050 aluminum plate and 08AL steel plate leave the heating furnace, they enter the rolling mill for hot rolling and compounding, the total reduction 30%-40%;

S8), then carry out annealing treatment in a continuous annealing furnace, the annealing temperature is 650-700° C., and the annealing time is 3-6 minutes. The finished product is flattened, finished and inspected in the skin pass unit to obtain 1050 aluminum/08AL steel composite plates.

Preferably, the 1050 aluminum coil includes the following components:

Si 0.1-0.2wt%;

Cu≤0.05wt%;

Mg≤0.05wt%;

Zn≤0.05wt%;

Ti≤0.03wt%;

V≤0.05wt%;

Fe≤0.20wt%;

The rest is Al and unavoidable impurities.

Preferably, the 08AL steel coil includes the following components:

C 0.05-0.08wt%;

Si≤0.05wt%;

Mn0.2-0.4wt%;

P<0.015wt%;

S<0.010wt%;

AL0.025-0.06wt%;

The rest is Fe and unavoidable impurities.

Preferably, in step S5), the principle of stress application is to apply tensile stress to difficult-to-deform metals, the pre-stretching deformation is 2-5%, and the strain rate is 0.3-1.2mm/min.

Preferably, in step S8), the interfacial shear strength of the 1050 aluminum/08AL steel composite plate is ≥90 MPa, and the number of repeated bending is ≥10 times.

The beneficial effects of the present invention are:

1. In the present invention, the metal aluminum plate and steel plate are combined together through hot rolling and rolling, and the heat treatment after rolling promotes the interdiffusion between metal atoms and triggers the occurrence of other compounding mechanisms, which significantly enhances the bonding strength of the composite plate;

2. The interface shear strength of the aluminum/steel composite plate of the present invention is ≥90MPa, and the number of repeated bending is ≥10 times;

3. The rolling technology of the present invention is easy to realize large-scale industrial production, and at the same time, there is no environmental pollution problem caused by electroplating and physical and chemical method cladding. It is a kind of aluminum/steel metal layer with very good development potential. Composite material preparation and processing technology reduces production costs and saves social resources.

Detailed ways

The specific embodiment of the present invention is described further below:

Example 1

This embodiment provides a rolling method of 1050 aluminum/08AL steel composite plate, wherein the 1050 aluminum coil includes the following components:

Si is 0.15wt%;

Cu is 0.02wt%;

Mg is 0.03wt%;

Zn is 0.03wt%;

Ti is 0.01wt%;

V is ≤0.03wt%;

Fe is 0.15wt%;

The rest is Al and unavoidable impurities.

The 08AL steel coil includes the following components:

C is 0.05wt%;

Si is 0.02wt%;

Mn is 0.4wt%;

P is 0.010wt%;

S is 0.005wt%;

AL is 0.05wt%;

The rest is Fe and unavoidable impurities.

Described method comprises the following steps:

S1), the rolled 1050 aluminum coil and the 08AL steel coil are respectively placed on two uncoilers for uncoiling;

S2), after uncoiling, the surface of the steel plate is cleaned with 10% HCl solution, and the aluminum plate is cleaned with 10% NaOH solution, then the residual HCl and NaOH solution and products on the surface are removed in clear water, and the water is squeezed dry with a squeeze roller;

S3), mechanically process the aluminum plate and the steel plate to be bonded surface with a rotating wire brush for 10 seconds, and the grinding direction is along the rolling direction of the composite plate;

S4), after being placed in the acetone solution for ultrasonic cleaning for 2 minutes, after coming out, blow and dry with hot air;

S5), the aluminum plate after surface treatment, steel plate are carried out pre-stretching or pre-compression according to its metal characteristic, stretching and compression direction are along rolling direction and vertical rolling direction; Pre-stretching deformation amount is 3%, strain rate 0.3mm/min;

S6), welding the edge of the prestressed aluminum plate and steel plate;

S7), before the rolling composite, at first carry out the pre-heating treatment of the welded steel-aluminum plate before rolling, the preheating temperature is 450 ℃; After the steel-aluminum plate leaves the heating furnace, enter the rolling mill for hot-rolling composite, the total reduction is 35% ;

S8), annealing treatment is carried out in a continuous annealing furnace, the annealing temperature is 650° C., and the annealing time is 6 minutes. The finished product is flattened, finished and inspected in the leveling unit. The shear strength of the interface of the aluminum/steel composite plate is 105MPa, and the number of repeated bending is 12 times.

Example 2

Si is 0.12wt%, Cu is 0.03wt%, Mg is 0.02wt%, Zn is 0.03wt%, Ti is 0.01wt%, V is ≤0.03wt%, Fe is 0.16wt%, the rest is Al and unavoidable impurities;

The 08AL steel coil includes the following components:

C is 0.06wt%, Si is 0.03wt%, Mn is 0.2wt%, P is 0.010wt%, S is 0.005wt%, Al is 0.025wt%, and the rest is Fe and unavoidable impurities.

Described method comprises the following steps:

S2), after uncoiling, the surface of the steel plate is cleaned with 12% HCl solution, and the aluminum plate is cleaned with 8% NaOH solution, then the residual HCl and NaOH solution and products on the surface are removed in clear water, and the water is squeezed dry with a squeeze roller;

S3), mechanically treat the aluminum plate and the steel plate to be bonded surface with a rotating wire brush for 12s, and the grinding direction is along the rolling direction of the composite plate;

S4), after being placed in the acetone solution ultrasonic cleaning 3min subsequently, after coming out, carry out blowing and drying with hot blast;

S5), the aluminum plate after surface treatment, steel plate is carried out pre-stretching or pre-compression according to its metal characteristic, stretching and compression direction are along rolling direction and vertical rolling direction; Pre-stretching deformation amount is 5%, strain rate 0.8mm/min;

S6), welding the edge of the prestressed aluminum plate and steel plate;

S7), before the rolling composite, at first carry out the preheating treatment before the rolling of the welded steel-aluminum plate, the preheating temperature is 400 ℃; After the steel-aluminum plate leaves the heating furnace, it enters the rolling mill for hot-rolling composite, and the total reduction is 30% ;

S8), annealing treatment is carried out in a continuous annealing furnace, the annealing temperature is 680° C., and the annealing time is 5 minutes. The finished product is flattened, finished and inspected in the leveling unit. The shear strength of the aluminum/steel composite plate interface was detected to be 100MPa, and the number of repeated bending was 11 times.

Example 3

Si is 0.18wt%, Cu is 0.01wt%, Mg is 0.03wt%, Zn is 0.03wt%, Ti is 0.02wt%, V is ≤0.03wt%, Fe is 0.15wt%, the rest is Al and unavoidable impurities;

The 08AL steel coil includes the following components:

C is 0.05wt%, Si is 0.03wt%, Mn is 0.3wt%, P is 0.010wt%, S is 0.005wt%, Al is 0.06wt%, and the rest is Fe and unavoidable impurities.

Described method comprises the following steps:

S2), after uncoiling, the surface of the steel plate is cleaned with 15% HCl solution, and the aluminum plate is cleaned with 12% NaOH solution, then the residual HCl and NaOH solution and products on the surface are removed in clear water, and the water is squeezed dry with a squeeze roller;

S5), the aluminum plate after surface treatment, steel plate is carried out pre-stretching or pre-compression according to its metal characteristic, stretching and compression direction are along rolling direction and vertical rolling direction; Pre-stretching deformation amount is 2%, strain rate 0.6mm/min;

S6), welding the edge of the prestressed aluminum plate and steel plate;

S7), before the rolling composite, at first carry out the preheating treatment before rolling of the welded steel-aluminum plate, the preheating temperature is 500 ℃; After the steel-aluminum plate comes out of the heating furnace, it enters the rolling mill for hot-rolling composite, and the total reduction is 40% ;

S8), annealing treatment is carried out in a continuous annealing furnace, the annealing temperature is 700° C., and the annealing time is 3 minutes. The finished product is flattened, finished and inspected in the leveling unit. The shear strength of the aluminum/steel composite plate interface was detected to be 110MPa, and the number of repeated bending was 12 times.

Example 4

Si is 0.18wt%, Cu is 0.02wt%, Mg is 0.03wt%, Zn is 0.03wt%, Ti is 0.01wt%, V is ≤0.03wt%, Fe is 0.12wt%, the rest is Al and unavoidable impurities;

The 08AL steel coil includes the following components:

C is 0.05wt%, Si is 0.02wt%, Mn is 0.3wt%, P is 0.012wt%, S is 0.006wt%, Al is 0.04wt%, and the rest is Fe and unavoidable impurities.

Described method comprises the following steps:

S2), after uncoiling, the surface of the steel plate is cleaned with 12% HCl solution, and the aluminum plate is cleaned with 10% NaOH solution, then the residual HCl and NaOH solution and products on the surface are removed in clear water, and the water is squeezed dry with a squeeze roller;

S3), mechanically process the surface to be bonded of the aluminum plate and the steel plate with a rotating wire brush for 15 seconds, and the grinding direction is along the rolling direction of the composite plate;

S5), the aluminum plate after surface treatment, steel plate is carried out pre-stretching or pre-compression according to its metal characteristic, stretching and compression direction are along rolling direction and vertical rolling direction; Pre-stretching deformation amount is 2%, strain rate 1.2mm/min;

S6), welding the edge of the prestressed aluminum plate and steel plate;

S7), before the rolling composite, at first carry out the pre-heating treatment of the welded steel and aluminum plate before rolling, the preheating temperature is 480 ℃; After the steel and aluminum plate comes out of the heating furnace, enter the rolling mill for hot rolling and compounding, the total reduction is 36% ;

S8), annealing treatment is carried out in a continuous annealing furnace, the annealing temperature is 680° C., and the annealing time is 4.5 minutes. The finished product is flattened, finished and inspected in the skin pass unit. The shear strength of the interface of the aluminum/steel composite plate is 105MPa, and the number of repeated bending is 11 times.

What described in above-mentioned embodiment and description just illustrate the principle of the present invention and preferred embodiment, under the premise of not departing from the spirit and scope of the present invention, the present invention also can have various changes and improvements, and these changes and improvements all fall into within the scope of the claimed invention.

Claims

A rolling method of 1050 aluminum/08AL steel clad plate is characterized in that it comprises the following steps:

S1), the rolled 1050 aluminum coil and the 08AL steel coil are respectively placed on two uncoilers for decoiling;

S2), the surface of the 08AL steel plate after uncoiling is cleaned with 8-15% HCl solution, the 1050 aluminum plate is cleaned with 10-12% NaOH solution, and then the residual HCl and NaOH solution and products on the surface are removed in clean water, and squeezed out with a roller squeeze out the water;

S3), the 1050 aluminum plate and the 08AL steel plate to be bonded surface processed in step S2) are mechanically treated for 10-15s by the rotating wire brush method, and the grinding direction is along the rolling direction of the composite plate;

S4), then place the 1050 aluminum plate and 08AL steel plate treated in step S3) in an acetone solution for ultrasonic cleaning for 2-3 minutes, and then blow and dry them with hot air after coming out;

S5), the surface-treated 1050 aluminum plate and 08AL steel plate are pre-stretched or pre-compressed according to their metal properties, and the stretching and compression directions are along the rolling direction and vertical rolling direction;

S6), welding the edge of the 1050 aluminum plate and 08AL steel plate prestressed in step S5);

S7), the welded 1050 aluminum plate and 08AL steel plate are preheated before rolling, and the preheating temperature is 400°C-500°C; after the 1050 aluminum plate and 08AL steel plate leave the heating furnace, they enter the rolling mill for hot rolling and compounding, the total reduction 30%-40%;

S8), then carry out annealing treatment in a continuous annealing furnace, the annealing temperature is 650-700° C., and the annealing time is 3-6 minutes. The finished product is flattened, finished and inspected in the skin pass unit to obtain 1050 aluminum/08AL steel composite plates.
A rolling method of 1050 aluminum/08AL steel composite plate according to claim 1, characterized in that: said 1050 aluminum coil comprises the following components:

Si 0.1-0.2wt%;

Cu≤0.05wt%;

Mg≤0.05wt%;

Zn≤0.05wt%;

Ti≤0.03wt%;

V≤0.05wt%;

Fe≤0.20wt%;

The rest is Al and unavoidable impurities.
A rolling method of 1050 aluminum/08AL steel composite plate according to claim 1, characterized in that: said 08AL steel coil comprises the following components:

C 0.05-0.08wt%;

Si≤0.05wt%;

Mn0.2-0.4wt%;

P<0.015wt%;

S<0.010wt%;

AL0.025-0.06wt%;

The rest is Fe and unavoidable impurities.
The rolling method of a 1050 aluminum/08AL steel composite plate according to claim 1, characterized in that: in step S5), the principle of stress type application is to apply tensile stress to difficult-to-deform metals, and the pre-stretching deformation is 2-5 %, the strain rate is 0.3-1.2mm/min.
The rolling method of a 1050 aluminum/08AL steel composite plate according to claim 1, characterized in that: in step S8), the interfacial shear strength of the 1050 aluminum/08AL steel composite plate is ≥90MPa, repeated bending Times ≥ 10 times.