JP7107610B2 - Process for producing interlocking steel-aluminum composite rolled material with embedded grooves - Google Patents

Description

Field of the Invention The present invention belongs to the technical field of composite materials and methods of manufacturing the same, and more particularly to a method of manufacturing embedded groove interlocking steel-aluminum composite rolled materials.

Steel-aluminum plate composite plate is an aluminum plate reinforced steel base composite made of steel as a base material and aluminum as a reinforcing material. and has application prospects. However, aluminum instantly forms an oxide film in the air, which significantly inhibits the combination of steel and aluminum. It should be crushed enough to expose the fresh metal inside the aluminum plate to bond with the steel.

The existing steel-aluminum plate material cold rolling composite method usually achieves steel-aluminum preliminary composite by rolling with a rolling reduction of 55% or more at a single time, but at this time the composite strength is low. Strengthening by heat treatment is carried out so that the atoms diffuse sufficiently to form a high strength bond between the interfaces. However, the thickness of the steel-aluminum composite plate manufactured by this method is usually less than 5 mm. When a thick steel-aluminum composite plate is produced by the cold rolling composite method, a single rolling reduction rate of 55% or more is required in order to be able to initially form a steel-aluminum bond, otherwise, The steel and aluminum are easily separated after rolling, and the surface of the aluminum at the pre-bonding interface is instantly re-oxidized to hinder the composite, and then even if rolling is performed multiple times, the first time must be premised on rolling at a rolling reduction of 55% or more. However, in the rolling of steel-aluminum sheets of thickness standards, a rolling reduction of 55% or more in a single roll imposes high requirements on the rolling capacity of the rolling mill equipment, and it is difficult to achieve such a high rolling capacity.

SUMMARY OF THE INVENTION The present invention has been made in view of the above problems, and provides a method for manufacturing embedded groove interlocking steel-aluminum composite rolled material. In this method, the steel plate is processed with embedded grooves, and the mechanical interlock structure obtained after rolling allows the steel and aluminum to be tightly bonded together, preventing air from entering the interface of the composite schedule, and re-rolling. can avoid the oxidation of the surface of the aluminum, so that the aluminum plate is greatly deformed by rolling at a low reduction rate multiple times, and the oxide film on the surface of the aluminum plate is sufficiently crushed, and the fresh metal inside the aluminum plate is exposed. It is possible to reduce the temperature of the steel so that it effectively joins with the steel. By this method, after the aluminum plate is fitted to the steel plate, rolling is performed multiple times to realize the embedded steel-aluminum rolling composite, and the resulting mechanical interlock structure is similar to that of the steel during heat treatment. increases the contact pressure between steel and aluminium, further promoting atomic interdiffusion to aid in the formation of high-strength bonds, enabling cold-rolled composites of steel and aluminum through multiple rolling at low reductions, The rolling capacity requirements of the rolling mill can be lowered.

The technical means of the present invention for achieving the above objects are as follows.
The present invention provides a method for manufacturing embedded groove interlocking steel-aluminum composite rolled material, which comprises processing embedded grooves on the mating surface of the steel plate and fitting with the aluminum plate. , by performing multiple rollings at low rolling reduction, it is possible to realize embedded steel-aluminum pre-composite, and the resulting mechanical interlocking structure enhances the diffusion bonding effect during heat treatment to achieve interfacial contact. While fully improving the joint strength, it can be rolled multiple times with a low rolling reduction to achieve the cold rolling combination of steel and aluminum, and reduce the rolling capacity requirements of the rolling mill.

ここで、ｈは圧延予定鋼板の溝深さであり、ｈ_１は圧延予定鋼板の厚さであり、ｈ_２は圧延予定アルミニウム板の厚さであり、ａは圧延予定鋼板の幅であり、ｂは圧延予定アルミニウム板の幅であり、αはアリ溝の溝角度であり、
アーク溝のサイズと鋼板の厚さ及び幅とアルミニウム板の厚さ及び幅との関係式は、式（４）、（５）及び（６）で示し、

ここで、ｈは圧延予定鋼板の溝深さ又は溝径であり、ｈ_１は圧延予定鋼板の厚さであり、ｈ_２は圧延予定アルミニウム板の厚さであり、ａは圧延予定鋼板の幅であり、ｂは圧延予定アルミニウム板の幅である、埋込式溝の加工ステップＳ１と、
圧延予定アルミニウム板及びステップＳ１で得られた圧延予定鋼板の複合予定面の酸化物及び油汚れを浄化する、表面処理ステップＳ２と、
圧延予定鋼板の合せ面に埋込式溝又はアーク溝を加工し、圧延予定アルミニウム板を嵌着した後、液圧プレスで予圧及び平坦化を行い、最初の当接予備取り付けを達成する、当接圧着予備取り付ステップＳ３と、
ステップＳ３における予備取り付け加工品を圧延して埋込式の機械的インタロックの鋼－アルミニウム複合板材を予備複合し、予備複合板を得る、予備取り付け加工品の圧延ステップＳ４と、
ステップＳ４における予備複合板材に対して３５０℃～６００℃の温度範囲で１時間焼鈍する、熱処理ステップＳ５と、を含む。 A method for manufacturing a steel-aluminum composite rolled steel-aluminum composite with embedded grooves and interlocks, which is one embodiment of the present invention, comprises:
By processing an embedded groove whose shape is a dovetail groove or an arc groove in a steel plate to be rolled, and analyzing the failure mode when rolling a composite plate with embedded grooves, the size of the groove, the steel plate Obtaining a relational expression between the thickness and width of the aluminum plate and the thickness and width of the aluminum plate, achieving processing grooves on the steel plate that match the aluminum plate to be rolled,
The relational expressions between the size of the dovetail groove, the thickness and width of the steel plate, and the thickness and width of the aluminum plate are represented by the formulas (1), (2) and (3),

Here, h is the groove depth of the steel plate to be rolled, h1 is the thickness of the steel plate to be rolled, _h2 is the thickness of the aluminum plate to be rolled, _a is the width of the steel plate to be rolled, b is the width of the aluminum plate to be rolled, α is the groove angle of the dovetail groove,
The relational expressions between the size of the arc groove, the thickness and width of the steel plate, and the thickness and width of the aluminum plate are expressed by formulas (4), (5) and (6),

Here, h is the groove depth or groove diameter of the steel plate to be rolled, _h1 is the thickness of the steel plate to be rolled, _h2 is the thickness of the aluminum plate to be rolled, and a is the width of the steel plate to be rolled. and b is the width of the aluminum plate to be rolled, the embedded groove processing step S1;
A surface treatment step S2 for purifying oxides and oil stains on the combined surfaces of the aluminum plate to be rolled and the steel plate to be rolled obtained in step S1;
The mating surface of the steel plate to be rolled is processed with embedded grooves or arc grooves, and the aluminum plate to be rolled is fitted, and then pre-pressed and flattened by hydraulic press to achieve the first contact pre-installation. a contact pressure pre-attachment step S3;
a pre-mounted workpiece rolling step S4 of rolling the pre-mounted workpiece in step S3 to pre-composite the embedded mechanical interlock steel-aluminum composite plate to obtain a pre-composite plate;
a heat treatment step S5 in which the preliminary composite plate in step S4 is annealed at a temperature range of 350° C. to 600° C. for 1 hour.

Preferably, in step S1, the recessed grooves are machined by a milling machine or wire electric discharge.

Further, in step S2, oxides on the composite surface are removed with a wire brush, sandpaper, or a grinding wheel, oil stains on the composite surface are wiped off with acetone and alcohol, and then dried with an air blower.

Preferably, in step S3, the width of the aluminum plate to be rolled has an interference with respect to the groove width of the steel plate to be rolled, thereby realizing an interference fit between the aluminum plate to be rolled and the steel plate to be rolled.

Preferably, in step S4, a rolling mill is used to cold-roll the pre-mounted workpiece multiple times, where the rolling speed is 0.1-5 m/s and the single rolling reduction is 10%-60. %, an embedded mechanical interlocking prestructure of aluminum plate and steel plate is obtained, and then subjected to multiple rolling with the condition that the total cold rolling reduction is 55% or more, and the steel is - Achieving pre-compositing of aluminum composite plate, the shear strength of the composite plate is above 74MPa.

Preferably, the preliminary composite plate is annealed for 1 hour in step S5 and then cooled in a furnace to obtain a steel-aluminum composite plate.

ADVANTAGE OF THE INVENTION This invention has the following advantages by employ|adopting said technical means.
(1) Compared with the existing steel-aluminum composite method, the present invention requires that the steel-aluminum bimetal composite plate is compound-rolled in the prior art, unless the single rolling reduction is considerably large. It can solve the problems that cannot be achieved. When a shear test piece was prepared and measured, the shear strength of the composite plate material was 74 MPa or more when rolling was performed with a total rolling reduction of 58% or more twice, and a single rolling with the same rolling reduction was performed. Composite strength increased by more than 15 MPa, lowering the requirement for rolling capacity of the rolling mill equipment compared to the case where it was carried out.
(2) According to the method of manufacturing the interlocked steel-aluminum composite rolled material with embedded grooves of the present invention, the aluminum plate is greatly deformed by rolling a plurality of times at a low rolling reduction to oxidize the surface of the aluminum plate. Sufficiently crush the coating to expose the fresh metal inside the aluminum plate for effective bonding with the steel.
(3) According to the present invention, after forming embedded grooves in the mating surfaces of the steel plates and fitting the aluminum plate to the steel plates, rolling is performed multiple times at a low rolling reduction to form embedded steel- Starting with the aluminum composite, the resulting mechanical interlock structure enhances the diffusion bonding effect during heat treatment, further promotes the interdiffusion of atoms to form high-strength bonding, and fully enhances the interfacial contact bonding strength. While improving, it enables cold rolling combination of steel and aluminum with multiple cold rollings with low reduction, reducing the rolling capacity requirements of the rolling mill.
(4) When manufacturing a steel-aluminum composite plate by cold rolling, a single rolling reduction of 55% or more is required to achieve mechanical engagement or precompositing, but the rolling equipment Considering the rolling capacity of the rolling equipment, most of the existing composite plate rolling methods use hot rolling technology because it is difficult to provide the rolling force required for composite. In contrast, the present invention allows single rolling at a low reduction to allow mechanical engagement or pre-compositing, and cold rolling multiple times at a low reduction to achieve cold rolling compositing. Compared with hot rolling, the cold rolling composite method has the advantages of high product dimensional accuracy, good surface quality, arbitrarily adjustable product thickness ratio, and no limit on the thickness of the coating layer. be. In addition to having the advantages of low production cost, high efficiency and convenient industrial production, the present invention does not have interfacial oxidation due to heating of the crude material, and is less prone to intermetallic compounds at the interface, resulting in higher quality. can be obtained.

1 is a flow chart of a method for producing embedded grooved interlock steel-aluminum composite rolled material according to the present invention; FIG. 4 is a schematic view of a dovetail groove machined into a steel plate to be rolled in the method for producing an interlock steel-aluminum composite rolled material with embedded grooves according to the present invention; FIG. 3 is a schematic view of the aluminum sheet to be rolled according to the present invention fitted into grooves on the surface of the steel sheet. 1 is a schematic view of an arc groove machined in a steel plate to be rolled in the method for producing an embedded grooved interlock steel-aluminum composite rolled material according to the present invention; FIG. FIG. 3 is a schematic diagram of the aluminum sheet to be rolled according to the present invention fitted in contact with grooves on the surface of the steel sheet. 4 is a graph showing the relationship between shear strength and strain when the total rolling reduction is 58% according to Example 1. FIG. 10 is a graph showing the relationship between shear strength and strain when the total rolling reduction is 65% according to Example 2. FIG.

Hereinafter, the technical means of the embodiments of the present invention will be described more clearly and in detail in combination with the drawings. Any other embodiments obtained by those skilled in the art without creative efforts based on the embodiments of the present invention shall fall within the protection scope of the present invention. It should be noted that, unless defined otherwise, technical or scientific terms used in this application have ordinary meanings that can be understood by those of ordinary skill in the art.

In the embodiments below, the technical means of the present invention will be described in more detail in combination with the drawings.

As shown in FIG. 1, the method for producing embedded grooved interlock steel-aluminum composite rolled material of the present invention includes the following steps.

ここで、ｈは圧延予定鋼板の溝深さであり、ｈ_１は圧延予定鋼板の厚さであり、ｈ_２は圧延予定アルミニウム板の厚さであり、ａは圧延予定鋼板の幅であり、ｂは圧延予定アルミニウム板の幅であり、αはアリ溝の溝角度であり、
アーク溝のサイズと鋼板の厚さ及び幅とアルミニウム板の厚さ及び幅との関係式は、式（４）、（５）及び（６）の通りであり、

ここで、ｈは圧延予定鋼板の溝深さ又は溝径であり、ｈ_１は圧延予定鋼板の厚さであり、ｈ_２は圧延予定アルミニウム板の厚さであり、ａは圧延予定鋼板の幅であり、ｂは圧延予定アルミニウム板の幅である。 Embedded groove processing step S1: processing embedded grooves in the steel plate to be rolled, setting the shape of the grooves to dovetail grooves or arc grooves, where failures occur when rolling composite plates with embedded grooves By analyzing the mode, we obtained a relational expression between the size of the groove, the thickness and width of the steel plate, and the thickness and width of the aluminum plate. achieved to be processed into
The relational expressions between the size of the dovetail groove, the thickness and width of the steel plate, and the thickness and width of the aluminum plate are as shown in formulas (1), (2) and (3),

Here, h is the groove depth of the steel plate to be rolled, h1 is the thickness of the steel plate to be rolled, _h2 is the thickness of the aluminum plate to be rolled, _a is the width of the steel plate to be rolled, b is the width of the aluminum plate to be rolled, α is the groove angle of the dovetail groove,
The relational expressions between the size of the arc groove, the thickness and width of the steel plate, and the thickness and width of the aluminum plate are as shown in formulas (4), (5) and (6),

Here, h is the groove depth or groove diameter of the steel plate to be rolled, _h1 is the thickness of the steel plate to be rolled, _h2 is the thickness of the aluminum plate to be rolled, and a is the width of the steel plate to be rolled. and b is the width of the aluminum plate to be rolled.

Surface treatment step S2: The aluminum plate to be rolled and the steel plate to be rolled obtained in step S1 are cleaned of oxides and oil stains on the composite surfaces.

Abutting and crimping pre-installation step S3: The mating surface of the steel plate to be rolled is processed with embedded grooves or arc grooves, and after the aluminum plate to be rolled is fitted, precompression and flattening are performed by a hydraulic press. to achieve the abutment pre-mounting of

Rolling the pre-mounted work piece S4: Rolling the pre-mounted work piece in step S3 to achieve the pre-composite of embedded mechanical interlock steel-aluminum composite plate.

Heat treatment step S5: The preliminary composite plate in step S4 is subjected to heat treatment, where the heat treatment is annealed at a temperature range of 350° C. to 600° C. for 1 hour.

(Example 1)
As shown in FIG. 2, Example 1 is an example in which dovetail grooves are processed in a steel sheet 2 to be rolled Q235 and combined with a 5052 aluminum sheet 1 to be rolled.

Embedded groove processing step S1: Use a milling machine to machine embedded dovetail grooves in the Q235 steel plate 2 with a width of 30 mm. 5mm steel plate thickness, 4mm aluminum plate thickness and 15mm width are selected, and the length of the steel plate and aluminum plate is greater than the width.

Surface treatment step S2: Remove oxides on the composite planned surface of the steel-aluminum plate of the 5052 aluminum plate 1 and the Q235 steel plate 2 obtained in step 1 with a wire brush, sandpaper or grinding wheel, and oil stains on the composite planned surface is wiped off with acetone and alcohol, dried with an air blower, and used for the next treatment.

Abutting and crimping pre-installation step S3: After processing an embedded dovetail groove on the mating surface of the Q235 steel plate 2 and fitting the 5052 aluminum plate 1, preloading and flattening are performed by a hydraulic press, and the first contact Accomplish pre-installation.

Step S4 of rolling the pre-mounted workpiece: Rolling the pre-mounted workpiece for the first time with a rolling reduction of 30% for the first embedded mechanical interlock between the Q235 steel plate 2 and the 5052 aluminum plate 1 and then a second rolling at a rolling reduction of 40% to achieve pre-compositing of the steel-aluminum composite plate.

Heat treatment step S5: After annealing the preliminary composite plate at 400° C. for 1 hour, it is cooled in a furnace to obtain a steel-aluminum composite plate.

Prepare a shear test piece of a steel-aluminum composite plate and measure the shear strength with a tensile tester. The shear strength of the steel-aluminum composite plate obtained by rolling twice under the condition that the total rolling reduction is 58% is 74 MPa (Fig. 4). Compared to , the rolling capacity requirements of the rolling mill equipment can be lowered, and the composite strength is increased by about 15 MPa compared to single rolling.

(Example 2)
As shown in FIG. 3, Example 2 is an example in which dovetail grooves are processed in a Q235 steel plate 2 to be rolled, and a 5052 aluminum plate 1 to be rolled is compound-rolled.

Embedded groove processing step S1: Use a milling machine to machine embedded grooves in the Q235 steel plate 2 with a width of 10 mm. Thickness, aluminum plate thickness of 4 mm, width of 15 mm should be selected, and the length of the steel plate and aluminum plate should be greater than the width.

Surface treatment step S2: Remove oxides on the mating surfaces of the 5052 aluminum plate 1 and the Q235 steel plate 2 with a wire brush, sand paper or grinding wheel, wipe off with acetone and alcohol, and then dry with a blower for the next treatment. .

Abutment crimping pre-installation step S3: After fitting the 5052 aluminum plate 1 to the grooved Q235 steel plate 2, it is pre-pressed and flattened by a hydraulic press to achieve the first abutment pre-installation.

Step S4 of rolling the pre-mounted workpiece: Rolling the pre-mounted workpiece for the first time with a rolling reduction of 30% for the first embedded mechanical interlock between the Q235 steel plate 2 and the 5052 aluminum plate 1 and then perform the second and third rolling with a rolling reduction of 30% respectively to achieve the pre-compositing of the steel-aluminum composite plate.

Heat treatment step S5: After annealing the preliminary composite plate at 450° C. for 1 hour, it is cooled in a furnace to obtain a steel-aluminum composite plate.

Prepare a shear test piece of a steel-aluminum composite plate and measure the shear strength with a tensile tester. The shear strength of the steel-aluminum composite plate material obtained by rolling three times under the condition that the total rolling reduction is 65% is 81 MPa (Fig. 5). , the rolling capacity requirements of the rolling mill equipment can be lowered, and the composite strength is increased by about 20 MPa compared to single rolling.

In summary, the steel-aluminum composite plate manufactured according to the present invention has better mechanical performance with better composite state and diffusion conditions than the same kind of steel-aluminum composite plate with the same rolling reduction, The resulting mechanical interlocking structure increases the contact pressure between steel and aluminum during heat treatment and further promotes atomic interdiffusion to form a high-strength bond, resulting in multiple low rolling reductions. It enables cold rolling combination of steel and aluminum by cold rolling, and lowers the rolling capacity requirements of rolling mills.

The above contents are only specific embodiments of the present invention, and the protection scope of the present invention is not limited thereto. Any modification or replacement readily made by a person skilled in the art within the technical scope disclosed in the present invention shall fall within the protection scope of the present invention. Therefore, the protection scope of the present invention should be subject to the protection scope of the claims.

ここで、ｈは圧延予定鋼板の溝深さであり、ｈ_１は圧延予定鋼板の厚さであり、ｈ_２は圧延予定アルミニウム板の厚さであり、ａは圧延予定鋼板の幅であり、ｂは圧延予定アルミニウム板の幅であり、αはアリ溝の溝角度であり、
アーク溝のサイズと鋼板の厚さ及び幅とアルミニウム板の厚さ及び幅との関係式は、式（４）、（５）及び（６）で示し、

ここで、ｈは圧延予定鋼板の溝深さ又は溝径であり、ｈ_１は圧延予定鋼板の厚さであり、ｈ_２は圧延予定アルミニウム板の厚さであり、ａは圧延予定鋼板の幅であり、ｂは圧延予定アルミニウム板の幅であることである、埋込式溝の加工ステップＳ１と、
圧延予定アルミニウム板及びステップＳ１で得られた圧延予定鋼板の複合予定面の酸化物及び油汚れを浄化する、表面処理ステップＳ２と、
圧延予定鋼板の合せ面に埋込式溝を加工して、圧延予定アルミニウム板を嵌着した後、液圧プレスで予圧及び平坦化を行い、最初の当接予備取り付けを達成する、当接圧着予備取り付けステップＳ３と、
ステップＳ３における予備取り付け加工品を圧延して、埋込式の機械的インタロックの鋼－アルミニウム複合板材を予備複合し、予備複合板を得る、予備取り付け加工品の圧延ステップＳ４と、
ステップＳ４における予備複合板材に対して３５０℃～６００℃の温度範囲で１時間焼鈍する、熱処理ステップＳ５と、を含む、ことを特徴とする埋込式溝付けのインタロックの鋼－アルミニウム複合圧延材の製造方法。 (Appendix)
(Appendix 1)
By processing embedded grooves whose shape is a dovetail groove or an arc groove in a steel plate to be rolled, and analyzing the failure mode when rolling a composite plate with embedded grooves, the size of the groove and the steel plate Obtaining a relational expression between the thickness and width of the aluminum plate and the thickness and width of the aluminum plate, processing the steel plate with a groove that matches the aluminum plate to be rolled,
The relational expressions between the size of the dovetail groove, the thickness and width of the steel plate, and the thickness and width of the aluminum plate are represented by the formulas (1), (2) and (3),

Here, h is the groove depth of the steel plate to be rolled, h1 is the thickness of the steel plate to be rolled, _h2 is the thickness of the aluminum plate to be rolled, _a is the width of the steel plate to be rolled, b is the width of the aluminum plate to be rolled, α is the groove angle of the dovetail groove,
The relational expressions between the size of the arc groove, the thickness and width of the steel plate, and the thickness and width of the aluminum plate are expressed by formulas (4), (5) and (6),

Here, h is the groove depth or groove diameter of the steel plate to be rolled, _h1 is the thickness of the steel plate to be rolled, _h2 is the thickness of the aluminum plate to be rolled, and a is the width of the steel plate to be rolled. and b is the width of the aluminum plate to be rolled, the embedded groove processing step S1;
A surface treatment step S2 for purifying oxides and oil stains on the combined surfaces of the aluminum plate to be rolled and the steel plate to be rolled obtained in step S1;
After processing the embedded groove on the mating surface of the steel plate to be rolled, and fitting the aluminum plate to be rolled, pressurize and flatten with hydraulic press to achieve the first contact pre-installation, contact crimping a preliminary mounting step S3;
a pre-mounted workpiece rolling step S4 of rolling the pre-mounted workpiece in step S3 to pre-composite the embedded mechanical interlock steel-aluminum composite plate to obtain a pre-composite plate;
and a heat treatment step S5 of annealing the pre-composite plate in step S4 at a temperature range of 350° C. to 600° C. for 1 hour. How the material is made.

(Appendix 2)
The method for producing steel-aluminum composite rolled material with embedded groove interlocking according to Appendix 1, characterized in that in step S1, the embedded groove is machined by milling or wire electric discharge.

(Appendix 3)
Supplementary note 1 characterized in that in step S2, oxides on the planned composite surface are removed with a wire brush, sandpaper or a grinding wheel, oil stains on the planned composite surface are wiped off with acetone and alcohol, and then dried with a blower. A method for producing the steel-aluminum composite rolling stock with embedded groove interlocking as described.

(Appendix 4)
Supplementary note 1, wherein in step S3, the width of the aluminum plate to be rolled has an interference with respect to the groove width of the steel plate to be rolled, and the aluminum plate to be rolled and the steel plate to be rolled are tightly fitted. embedded grooved interlocking steel-aluminum composite rolled material.

(Appendix 5)
In step S4, a rolling mill is used to cold-roll the pre-mounted workpiece multiple times, where the rolling speed is 0.1-5 m/s and the single rolling reduction is 10%-60%; An embedded mechanically interlocking preliminary structure of aluminum plate and steel plate is obtained, and then cold rolling is performed multiple times under the condition of a total rolling reduction of 55% or more to achieve the preliminary composite of steel-aluminum composite plate. and the shear strength of the composite plate is greater than or equal to 74 MPa.

(Appendix 6)
The embedded grooved interlock steel according to Appendix 1, characterized in that in step S5, the pre-composite plate is annealed for 1 hour and then cooled in a furnace to obtain a steel-aluminum composite plate. A method for manufacturing an aluminum composite rolled material.

1 5052 aluminum plate 2 Q235 steel plate

Claims (6)

Processing an embedded groove that has a dovetail groove or arc groove shape in the steel plate to be rolled and matches the aluminum plate to be rolled ,
Relational expressions among the size of the dovetail groove, the thickness and width of the steel plate to be rolled, and the thickness and width of the aluminum plate to be rolled are represented by formulas (1), (2) and (3),

Here, h is the groove depth of the steel plate to be rolled, _h1 is the thickness of the steel plate to be rolled, _h2 is the thickness of the aluminum plate to be rolled, and a is the thickness of the steel plate to be rolled. is the width of the aluminum plate to be rolled, b is the width of the aluminum plate to be rolled, α is the groove angle of the embedded groove,
Relational expressions among the size of the arc groove, the thickness and width of the steel plate to be rolled, and the thickness and width of the aluminum plate to be rolled are represented by formulas (4), (5) and (6),

Here, h is the groove depth or groove diameter of the steel plate to be rolled, h1 is the thickness of the steel plate to be rolled, _h2 is the thickness of the aluminum plate to be rolled, and _a is the rolled an embedded groove processing step S1, wherein b is the width of the steel plate to be rolled, and b is the width of the aluminum plate to be rolled;
a surface treatment step S2 for purifying oxides and oil stains on the combined surfaces of the aluminum plate to be rolled and the steel plate to be rolled obtained in step S1;
After processing the embedded groove on the mating surface of the steel plate to be rolled, and fitting the aluminum plate to be rolled, pre-compression and flattening are performed by a hydraulic press to achieve the first abutment pre-installation. an abutment crimping pre-attachment step S3;
a pre-mounted workpiece rolling step S4 of rolling the pre-mounted workpiece in step S3 to pre-composite the embedded mechanical interlock steel-aluminum composite plate to obtain a pre-composite plate;
and a heat treatment step S5 of annealing the pre-composite plate in step S4 at a temperature range of 350° C. to 600° C. for 1 hour. A method for producing a composite rolled material. The method for producing steel-aluminum composite rolled material with embedded groove interlocking according to claim 1, characterized in that in step S1, the embedded grooves are machined by a milling machine or wire electric discharge. In the step S2, the oxides on the composite surface are removed with a wire brush, sandpaper or a grinding wheel, the oil stains on the composite surface are wiped off with acetone and alcohol, and then dried with a blower. The method for manufacturing the steel-aluminum composite rolled material with embedded groove interlock according to claim 1. In step S3, the width of the aluminum plate to be rolled has an interference with respect to the groove width of the steel plate to be rolled, and the aluminum plate to be rolled and the steel plate to be rolled are tightly fitted. The method for manufacturing the steel-aluminum composite rolled material with embedded groove interlock according to claim 1. In step S4, a rolling mill is used to cold-roll the pre-mounted workpiece multiple times, where the rolling speed is 0.1-5 m/s and the single rolling reduction is 10%-60%. As a result, an embedded mechanical interlock preliminary structure of the aluminum plate to be rolled and the steel plate to be rolled is obtained. - The steel-aluminum of the embedded groove interlock according to claim 1, characterized in that the precompositing of an aluminum composite plate is achieved, and the shear strength of the steel-aluminum composite plate is greater than or equal to 74 MPa. A method for producing a composite rolled material. The embedded grooving interface according to claim 1, characterized in that in said step S5, said preliminary composite plate is annealed for 1 hour and then cooled in a furnace to obtain said steel-aluminum composite plate. Lock's steel-aluminum composite rolling material manufacturing method.

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