Preparation method of high-strength and high-flexibility metal composite plate

Abstract

The invention discloses a preparation method of a high-strength and high-flexibility metal composite plate, and relates to the technical field of metal composite plate preparation, and the preparation method comprises the following steps: (1) pretreatment; (2) primary rolling; (3) composite sintering; (4) secondary rolling; and (5) finishing treatment. According to the preparation method of the high-strength and high-flexibility metal composite plate, in the preparation process, firstly, in the pretreatment step, conical hole grooves are formed in the composite surface of a lower metal plate at equal intervals, and conical protruding metal clamping blocks are preset on the composite surface of an upper metal plate at equal intervals, so that mechanical combination of the two metal plates in the later rolling process is facilitated; the critical deformation force needed by rolling compounding is reduced, the machining mode that primary rolling and secondary rolling are matched is adopted, the two metal plates can be densified by extruding the surfaces, the compactness of the two metal plates can be effectively improved, and therefore the machining quality and strength of the composite metal plate are improved.

Description

Technical Field

[0001] The invention relates to the technical field of metal composite plate preparation, and in particular to a method for preparing a high-strength and high-flexibility metal composite plate. Background Art

[0002] Metal composite plate refers to a plate with another metal on top of a layer of metal, which has achieved the effect of saving resources and reducing costs without reducing the use effect (anti-corrosion performance, mechanical strength, etc.). The composite methods usually include explosive composite, explosive rolling composite, rolling composite, etc. Composite materials can be divided into composite plates, composite pipes, composite rods, etc. according to their appearance. They are mainly used in anti-corrosion, pressure vessel manufacturing, power construction, petrochemical, medicine, light industry, automobile and other industries.

[0003] In the preparation process of existing metal composite plates, hot rolling mills are mostly used for direct hot rolling. During the hot rolling process, the two metal plates cannot be fully composited, and the poor quality of the bonding surface results in insufficient bonding of the metal composite plates, which leads to poor quality and strength of the metal composite plates. Therefore, we propose a method for preparing high-strength and high-flexibility metal composite plates. Summary of the invention

[0004] In view of the deficiencies in the prior art, the present invention provides a method for preparing a high-strength and high-flexibility metal composite plate, which solves the problem that the existing metal composite plates mentioned in the above background technology are mostly prepared by direct hot rolling on a hot rolling mill, and the two metal plates cannot be fully composited during the hot rolling process, resulting in poor bonding surface quality, insufficient bonding of the metal composite plate, and thus poor quality and strength of the metal composite plate.

[0005] To achieve the above objectives, the present invention is implemented by the following technical scheme: a method for preparing a high-strength and high-flexibility metal composite plate, comprising the following steps:

[0006] (1) Pretreatment;

[0007] (2) One-time rolling;

[0008] (3) Composite sintering;

[0009] (4) Secondary rolling;

[0010] (5) Finishing treatment.

[0011] Optionally, the method for preparing the high-strength and high-flexibility metal composite plate comprises the following specific steps:

[0012] (1) Pretreatment

[0013] Take two metal plates to be composited, degrease the composite surfaces of the two metal plates, set conical holes and grooves at equal intervals on the composite surface of the lower metal plate, and set conical protruding metal blocks at equal intervals on the composite surface of the upper metal plate;

[0014] (2) One-time rolling

[0015] Then, the composite surfaces of the two metal plates are heated, first preheated for 10-20 minutes, and after the metal plates are heated, they are placed in a compression molding device, and the conical protruding metal blocks of the upper metal plate are matched with the conical holes of the lower metal plate in a one-to-one manner to form a mosaic state, and at the same time, the gas between the two metal plates is extracted and the outer sides are sealed to seal the composite space, and then a hot rolling mill is used to roll and composite them to form a metal composite plate;

[0016] (3) Composite sintering

[0017] The composite metal composite plate is sent to a sintering furnace for sintering, so that the heating furnace is slowly heated for 4 to 6 hours and then the temperature is raised to the critical melting point temperature of the metal composite plate, and the heat preservation time is 2 to 4 hours, and then the heating furnace is cooled at a rate of 65 to 75° C. per hour, so that the metal composite plate is taken out of the furnace when it cools to two-thirds of the melting point temperature of the metal plate;

[0018] (4) Secondary rolling

[0019] The sintered metal clad plate is placed in a compression molding device again, and then subjected to secondary rolling by a hot rolling mill, and protective gas is sprayed onto the outside of the two metal plates during the rolling process, so that the density of the metal clad plate is increased by the secondary rolling, densification is completed, and mechanical bonding of the two metal plates is achieved while metallurgical bonding is achieved;

[0020] (5) Finishing treatment

[0021] After the secondary rolling is completed, the metal composite plate is taken out, trimmed after natural cooling, and then cut, polished and trimmed according to the designed size to make its edges regular and burr-free, and an anti-rust layer is coated on its outside to obtain a finished metal composite plate.

[0022] Optionally, during the pretreatment process of step (1), the conical holes or protruding metal blocks of the two metal plates are arranged at equal intervals.

[0023] Optionally, during the rolling process of step (2), the preheating temperature is one third of the melting point temperature of the two metal plates.

[0024] Optionally, during the composite sintering process of step (3), the sintering temperature is 850-1200°C.

[0025] Optionally, during the secondary rolling process of step (4), the protective gas is specifically argon.

[0026] Optionally, during the first rolling of step (2) and the second rolling of step (4), the conveying speed of the two metal plate conveying rollers in the hot rolling mill is 1 m / s, and the rolling speed of the hot rolling mill is 1 m / s.

[0027] The present invention provides a method for preparing a high-strength and high-flexibility metal composite plate, which has the following beneficial effects: in the preparation process of the high-strength and high-flexibility metal composite plate, firstly, in a pretreatment step, conical holes are equidistantly arranged on the composite surface of the lower metal plate, and conical protruding metal blocks are equidistantly preset on the composite surface of the upper metal plate, which is beneficial to the mechanical bonding of the two metal plates in the later rolling process, reduces the critical deformation force required for rolling bonding, and adopts a processing method of combining primary rolling and secondary rolling, which can densify the two metal plates by extruding the surface, and can effectively improve the density of the two metal plates. The processing quality and strength of the composite metal plate are improved. The temperature during composite sintering is 850-1200℃, so that the composite contact surface of the two metal plates is hot-melted to achieve rearrangement. The places where the surface curvature changes greatly will be preferentially dissolved through liquid phase flow mass transfer, and precipitated in the depressions or pores of large particles, so as to achieve the purpose of rapid material transfer, thereby making the composite combination of the two closer, while improving the flexibility, and achieving metallurgical combination while realizing mechanical combination of the two metal plates. The setting of protective gas during the rolling process can avoid oxidation of the surface of the metal composite plate, so as to obtain a metal composite plate with good quality. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 It is a schematic diagram of the preparation process of the present invention. DETAILED DESCRIPTION

[0029] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0030] See also Figure 1 The present invention provides a technical solution: a method for preparing a high-strength and high-flexibility metal composite plate, comprising the following steps:

[0031] (1) Pretreatment;

[0032] (2) One-time rolling;

[0033] (3) Composite sintering;

[0034] (4) Secondary rolling;

[0035] (5) Finishing treatment.

[0036] The method for preparing the high-strength and high-flexibility metal composite plate comprises the following specific steps:

[0037] (1) Pretreatment

[0038] Take two metal plates to be composited, degrease the composite surfaces of the two metal plates, set conical holes and grooves at equal intervals on the composite surface of the lower metal plate, and set conical protruding metal blocks at equal intervals on the composite surface of the upper metal plate;

[0039] (2) One-time rolling

[0040] Then, the composite surfaces of the two metal plates are heated, first preheated for 10-20 minutes, and after the metal plates are heated, they are placed in a compression molding device, and the conical protruding metal blocks of the upper metal plate are matched with the conical holes of the lower metal plate in a one-to-one manner to form a mosaic state, and at the same time, the gas between the two metal plates is extracted and the outer sides are sealed to seal the composite space, and then a hot rolling mill is used to roll and composite them to form a metal composite plate;

[0041] (3) Composite sintering

[0042] The composite metal composite plate is sent to a sintering furnace for sintering, so that the heating furnace is slowly heated for 4 to 6 hours and then the temperature is raised to the critical melting point temperature of the metal composite plate, and the heat preservation time is 2 to 4 hours, and then the heating furnace is cooled at a rate of 65 to 75° C. per hour, so that the metal composite plate is taken out of the furnace when it cools to two-thirds of the melting point temperature of the metal plate;

[0043] (4) Secondary rolling

[0044] The sintered metal clad plate is placed in a compression molding device again, and then subjected to secondary rolling by a hot rolling mill, and protective gas is sprayed onto the outside of the two metal plates during the rolling process, so that the density of the metal clad plate is increased by the secondary rolling, densification is completed, and mechanical bonding of the two metal plates is achieved while metallurgical bonding is achieved;

[0045] (5) Finishing treatment

[0046] After the secondary rolling is completed, the metal composite plate is taken out, trimmed after natural cooling, and then cut, polished and trimmed according to the designed size to make its edges regular and burr-free, and an anti-rust layer is coated on its outside to obtain a finished metal composite plate.

[0047] During the pretreatment process of step (1), the conical holes or protruding metal blocks of the two metal plates are equidistantly arranged; during the first rolling process of step (2), the preheating temperature is one-third of the melting point of the two metal plates; during the composite sintering process of step (3), the sintering temperature is 850-1200°C; during the second rolling process of step (4), the protective gas is specifically argon; during the first rolling of step (2) and the second rolling of step (4), the conveying speed of the conveying rollers of the two metal plates in the hot rolling mill is 1m / s, and the rolling speed of the hot rolling mill is 1m / s.

[0048] In summary, the method for preparing the high-strength and high-flexibility metal composite plate comprises the following specific steps when used:

[0049] The method for preparing the high-strength and high-flexibility metal composite plate comprises the following specific steps:

[0050] (1) Pretreatment: Take two metal plates to be composited, degrease the composite surfaces of the two metal plates, set conical holes and grooves at equal intervals on the composite surface of the lower metal plate, and set conical protruding metal blocks at equal intervals on the composite surface of the upper metal plate;

[0051] (2) One-time rolling: The composite surfaces of the two metal plates are then heated, first preheated for 10-20 minutes, and after the metal plates are heated, they are placed in a compression molding device, and the conical protruding metal blocks of the upper metal plate are matched with the conical holes of the lower metal plate in a one-to-one manner to form a mosaic state, and at the same time, the gas between the two metal plates is extracted and the outer sides are sealed to seal the composite space, and then a hot rolling mill is used to roll and composite them to form a metal composite plate;

[0052] (3) Composite sintering: The composite metal composite plate is sent to a sintering furnace for sintering, so that the heating furnace is slowly heated for 4 to 6 hours and then the temperature is raised to the critical melting point of the metal composite plate, and the heat preservation time is 2 to 4 hours, and then the heating furnace is cooled at a rate of 65 to 75° C. per hour, so that the metal composite plate is taken out of the furnace when it cools to two-thirds of the melting point of the metal plate;

[0053] (4) Secondary rolling: the sintered metal clad plate is placed in a compression molding device again, and then subjected to secondary rolling by a hot rolling mill. During the rolling process, a protective gas is sprayed onto the outside of the two metal plates. The density of the metal clad plate is increased by secondary rolling, densification is completed, and mechanical bonding of the two metal plates is achieved while metallurgical bonding is achieved.

[0054] (5) Finishing treatment: After the secondary rolling is completed, the metal composite plate is taken out, and the edges are trimmed after natural cooling. Then, it can be cut and polished according to the designed size to make the edges regular and burr-free, and an anti-rust layer is coated on the outside to obtain a finished metal composite plate.

[0055] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical scheme and inventive concept of the present invention within the technical scope disclosed by the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A method for preparing a high-strength and high-flexibility metal composite plate, characterized in that: The following steps are involved: (1) Pretreatment; (2) One-time rolling; (3) Composite sintering; (4) Secondary rolling; (5) Finishing treatment.

2. The method for preparing a high-strength and high-flexibility metal composite plate according to claim 1, characterized in that: The method for preparing the high-strength and high-flexibility metal composite plate comprises the following specific steps: (1) Pretreatment Take two metal plates to be composited, degrease the composite surfaces of the two metal plates, set conical holes and grooves at equal intervals on the composite surface of the lower metal plate, and set conical protruding metal blocks at equal intervals on the composite surface of the upper metal plate; (2) One-time rolling Then, the composite surfaces of the two metal plates are heated, first preheated for 10-20 minutes, and after the metal plates are heated, they are placed in a compression molding device, and the conical protruding metal blocks of the upper metal plate are matched with the conical holes of the lower metal plate in a one-to-one manner to form a mosaic state, and at the same time, the gas between the two metal plates is extracted and the outer sides are sealed to seal the composite space, and then a hot rolling mill is used to roll and composite them to form a metal composite plate; (3) Composite sintering The composite metal composite plate is sent to a sintering furnace for sintering, so that the heating furnace is slowly heated for 4 to 6 hours and then the temperature is raised to the critical melting point temperature of the metal composite plate, and the heat preservation time is 2 to 4 hours, and then the heating furnace is cooled at a rate of 65 to 75° C. per hour, so that the metal composite plate is taken out of the furnace when it cools to two-thirds of the melting point temperature of the metal plate; (4) Secondary rolling The sintered metal clad plate is placed in a compression molding device again, and then subjected to secondary rolling by a hot rolling mill, and protective gas is sprayed onto the outside of the two metal plates during the rolling process, so that the density of the metal clad plate is increased by the secondary rolling, densification is completed, and mechanical bonding of the two metal plates is achieved while metallurgical bonding is achieved; (5) Finishing treatment After the secondary rolling is completed, the metal composite plate is taken out, trimmed after natural cooling, and then cut, polished and trimmed according to the designed size to make its edges regular and burr-free, and an anti-rust layer is coated on its outside to obtain a finished metal composite plate.

3. The method for preparing a high-strength and high-flexibility metal composite plate according to claim 1, characterized in that: During the pretreatment process of step (1), the conical holes or protruding metal blocks of the two metal plates are arranged at equal distances.

4. The method for preparing a high-strength and high-flexibility metal composite plate according to claim 1, characterized in that: During the rolling process of step (2), the preheating temperature is one third of the melting point of the two metal plates.

5. The method for preparing a high-strength and high-flexibility metal composite plate according to claim 1, characterized in that: During the composite sintering process of step (3), the sintering temperature is 850-1200°C.

6. The method for preparing a high-strength and high-flexibility metal composite plate according to claim 1, characterized in that: During the secondary rolling process of step (4), the protective gas is specifically argon.

7. The method for preparing a high-strength and high-flexibility metal composite plate according to claim 1, characterized in that: During the first rolling of step (2) and the second rolling of step (4), the conveying speed of the two metal plate conveying rollers in the hot rolling mill is 1 m / s, and the rolling speed of the hot rolling mill is 1 m / s.

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