CN105798062B - A kind of method of oblique ripple roll Rolling compund strip - Google Patents

Abstract

The invention discloses a kind of method of oblique ripple roll Rolling compund strip, it is characterised in that：The composite plate blanks being made up of basal plate and complex laminate pass through the compound roughing mill equipped with oblique ripple roll and are rolled into the compound boards half-finished product of oblique ripple, and thickness needed for being then rolled to by the compound finishing mill equipped with plain-barreled roll obtains composite plate；The axial angle of the oblique ripple and roll is（10~80）°；Moment impact is produced when the present invention solves transverse wave rolling and during longitudinal ripple rolling due to the problem of axial force makes strip sideslip, the bonded area of composite plate after roughing is increased simultaneously, so as to increase the adhesion between basic unit and cladding, the combined strength bination and combined efficiency of composite plate are drastically increased.

Description

A method for rolling composite strips with oblique corrugated rolls

technical field

The invention belongs to the technical field of preparation of metal composite strips, and in particular relates to a method for rolling composite strips with oblique corrugated rolls.

Background technique

Metal clad strip refers to a strip that is layered with another metal on one layer of metal to achieve the effect of saving resources and reducing costs without reducing the use effect (anti-corrosion performance, mechanical strength, etc.). Metal composite material technology can give full play to the respective advantages of component materials, realize the optimal allocation of component material resources, save precious metal materials, and achieve performance requirements that cannot be met by a single metal. It is mainly used in anti-corrosion, pressure vessel manufacturing, power construction, Petrochemical, pharmaceutical, light industry, automobile and other industries. Composite methods usually include explosive composite method and metal pressure processing composite method.

Explosive composite method uses the high energy generated during the explosion to tightly weld dissimilar metal plates together, which can realize the composite between metals with large performance differences, and the interface bonding force is strong, but the size of the composite plate produced by this method is small The shape of the plate is poor, and the yield is low; and due to the high-energy impact of the explosion, the metal structure is affected, and the environmental pollution is serious.

The metal pressure processing compound method is to form a large number of bonding points at a distance close to the thickness of the compound surface, and then diffuse to form a stable metallurgical bond. The billet making process and interfacial composite mechanism are the main factors restricting the quality and output of clad metal strips. Among the pressure processing methods, the most studied is rolling compounding, including hot rolling, cold rolling, non-isothermal rolling, and asynchronous rolling. However, the rolling composite energy is low, the mechanical properties of dissimilar metal materials are greatly different, and the bonding interface is more complex than explosive bonding. Among them, air bubbles and inclusion cracks are easy to occur on the bonding surface of cast composite slabs. The choice of brazing flux for brazing composite slabs It has a great influence on the interface bonding of different metals and is easy to crack. In order to solve this problem, relevant scholars proposed the corrugated rolling pressure composite method, which better solved the technical problem of poor bonding performance of the composite interface during the production of composite panels. The current corrugated composite panels have transverse corrugated composite panels perpendicular to the rolling direction. And longitudinally corrugated composite plates parallel to the rolling direction. However, when the transverse corrugated roll is rolled, it is easy to produce instantaneous impact, and when the longitudinal corrugated roll is rolled, the strip deviation problem is easy to occur. Therefore, further research has been done on the corrugated roll rolling composite plate.

Contents of the invention

The object of the present invention is to propose a method for rolling composite strips with oblique corrugated rolls in order to solve the problem of instantaneous impact during rolling with transverse corrugated rolls and strip deviation due to axial force during rolling with longitudinal corrugated rolls.

The present invention is achieved through the following technical solutions:

1. A method for rolling composite strips with oblique corrugated rolls, is characterized in that, comprises the steps:

1) Blank making: select the metal base plate and the metal double plate, the deformation resistance of the double plate is greater than the deformation resistance of the base plate, clean the surface of the base plate and the double plate until the metal matrix is seen; stack the base plate and the double plate in order Packing, billet making, obtain composite slab;

2) Rough rolling: Roll the composite slab through a composite roughing mill equipped with oblique corrugated rolls to produce a semi-finished oblique corrugated composite slab with oblique corrugated composite surfaces on the composite surface, and the angle between the oblique corrugations and the axial direction of the rolls is (10 ~80)°;

3) Finish rolling: the semi-finished composite plate with overall oblique corrugations rolled out by rough rolling is flattened by a composite finish rolling mill and rolled to the required thickness to obtain the finished composite strip;

4) Finishing: Heat treatment, leveling and segmentation of the finished composite plate.

2. Wherein, the method for rolling a composite strip by a kind of oblique corrugated roll is characterized in that: the complex plate is one piece, and the composite rough rolling mill is that one roll is an oblique corrugated surface and one roll is a smooth surface. In the two-roll mill, the oblique corrugated rolls are in contact with the double plate, and the smooth surface rolls are in contact with the base plate for rolling.

3. Wherein, the method for rolling composite strips with oblique corrugated rolls is characterized in that: the doubler plates are two, located on the upper and lower sides of the base plate, and the composite rough rolling mill is that both rolls are The two-roll rolling mill with oblique corrugated surface makes the oblique corrugated rolls contact the upper and lower cladding plates for rolling.

4. Among them, the method for rolling composite strips with oblique corrugated rolls is characterized in that: hot rolling is carried out, and the billet making process in step 1) is: sending the stacked base plate and double plate to Compress with a press, spot weld the vertical plate around the stacked composite slab, and then use submerged arc welding to package and weld it, drill a hole at the end of the welded composite slab to vacuumize, and then close the hole to obtain a composite slab; In step 2), that is, before rough rolling, the qualified composite slab is sent to the heating furnace, heated to the rolling temperature, and then sent to the rough rolling mill for rough rolling.

5. Among them, the method for rolling composite strips with oblique corrugated rolls is characterized in that: cold rolling is carried out, and the billet making process in step 1) is: sending the stacked base plate and double plate to The press is pressed tightly, and the vertical plate is used to spot weld the stacked composite slabs first to obtain the composite slab; in step 2), that is, before the rough rolling, the qualified composite slab is sent to the cleaning equipment for cleaning, and then Then send to the rough rolling mill for rough rolling.

6. Wherein, the method for rolling a composite strip by a kind of oblique corrugated roll is characterized in that: the overall corrugated cross-sectional shape of the clad layer after rough rolling and the oblique corrugated cross-sectional shape of the composite surface of the base layer are arc-shaped, sinusoidal Waveform, triangle or rectangle.

7. Among them, the method for rolling composite strips with oblique corrugated rolls is characterized in that: the corrugation height of the compound surface of the composite plate after rough rolling and the corrugation height of the composite surface of the substrate are (0.1-1.5) of the thickness of the compound plate times, the corrugation width of the corrugated surface of the doubler plate after rough rolling is (3-20) times the corrugation height.

Invention advantage of the present invention and positive effect:

The present invention utilizes oblique corrugated corrugated rolls to solve the problems of instantaneous impact during rolling of transverse corrugated rolls and strip deviation due to axial force during rolling of longitudinal corrugated rolls. The combination area increases the bonding force between the base plate and the double board, and greatly improves the composite strength and composite efficiency of the composite board.

Description of drawings

Figure 1 is a schematic diagram of a single-sided composite slab;

Fig. 2 is a schematic diagram of rough rolling of a single-sided composite plate;

Figure 3 is a schematic diagram of a semi-finished single-sided composite panel after rough rolling;

Fig. 4 is a schematic diagram of finishing rolling of single-sided clad plate;

Figure 5 is a schematic diagram of the finished composite plate after finish rolling;

Fig. 6 is a schematic diagram of a double-sided composite slab;

Fig. 7 is a schematic diagram of rough rolling of double-sided clad plate;

Figure 8 is a schematic diagram of a semi-finished double-sided composite panel after rough rolling;

Fig. 9 is a schematic diagram of finishing rolling of a double-sided clad plate;

Figure 10 is a schematic diagram of the finished composite plate after finish rolling;

In the figure: 1, 1 ′- double plate; 2- base plate; 3- upper work roll for rough rolling; 4- lower work roll for rough rolling; 5- upper work roll for finish rolling; 6- lower work roll for finish rolling.

detailed description

The present invention will be described in further detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the present invention, not to limit the present invention.

Embodiment 1: Preparation of titanium steel-carbon steel single-sided composite panel

Billet making: Select TC3 titanium steel plate and Q345R carbon steel plate to assemble blanks according to the ratio of 1:4. The size of titanium steel plate is 40mm thick × 1500mm wide × 3000mm long as double plate 1; the size of carbon steel plate is 160mm thick × 1500mm wide × 3000mm long. As the base plate 2; clean the carbon steel plate and titanium steel plate until the metal base is seen; stack the double plate 1 and the base plate 2, send them to the press for compaction, and spot weld the 15mm thick carbon steel plate around the stacked composite slab Submerged arc welding is used to package and weld, and the welded composite slab end is drilled to vacuumize, and then the hole is closed to obtain a composite slab, as shown in Figure 1. The thickness of the composite slab is 200mm;

Heating: Send the qualified composite slab to the heating furnace and heat it to 950°C;

Rough rolling: the heated composite slab is sent to the composite rough rolling mill for rolling, as shown in Figure 2, the composite rough rolling mill is a two-roll mill in which a roll is an oblique corrugated roll 3 and a roll is a smooth surface roll 4, so that the oblique The upper rough roll 3 on the corrugated surface is in contact with the titanium steel cladding plate 1, and the lower rough roll 4 on the smooth surface is in contact with the carbon steel substrate 2, and the titanium steel-carbon steel composite slab is rolled into a semi-finished oblique corrugated composite plate, as shown in the figure As shown in 3, the section of the oblique corrugation of the composite plate is arc-shaped, the width of the arc-shaped corrugation is 5 times the height of the arc-shaped corrugation, and the height of the arc-shaped corrugation is 30mm, wherein the angle between the oblique corrugation and the oblique corrugation roll is 20°;

Finish rolling: as shown in Figure 4, the single-sided oblique corrugated composite plate after rough rolling is sent to the four-roll finishing mill for rolling. The work rolls 5, 6 and backup rolls of the finishing mill are all flat rolls with smooth surfaces. Upward rolling until the rough-rolled clad plate with one-sided oblique corrugation is rolled into a thick finished clad plate with flat sides, as shown in Figure 5;

Finally, trimming, heat treatment, leveling, sectioning, and finished products.

Embodiment 2: prepare copper plate-aluminum plate-copper plate double-sided composite board:

Blank making: Select T2 copper plate, LY2 aluminum plate and T2 copper plate to assemble blanks according to the ratio of 1:3:1. The size of the aluminum plate is 120mm thick×800mm wide×3000mm long as the base plate 2, and the size of the copper plate is 40mm thick×800mm wide×3000mm long. as the upper cladding board 1 and the lower cladding board 1' respectively; the aluminum board and two copper boards are cleaned until the metal base is seen; the lower cladding board 1 ', the base board 2 and the upper cladding board 1 are stacked and sent to Machine compaction, spot welding around the stacked composite slabs to obtain composite slabs, as shown in Figure 6, with a thickness of 200mm;

Cleaning: Send the qualified composite slab to the cleaning equipment for cleaning;

Rough rolling: the cleaned qualified composite slab is sent to the composite rough rolling mill for rolling, as shown in Figure 7, the composite rough rolling mill is a two-roll mill in which both rolls are oblique corrugated rolls, and the upper layer copper plate is composited along the length direction. Plate 1 and the lower layer copper cladding plate 1' are rolled into oblique corrugated composite plates, as shown in Fig. The joint surface of the joint is also an oblique corrugation joint surface that cooperates with each other; the cross-sectional shape of the oblique corrugation is triangular, the width of the triangular corrugation is 10 times the height of the triangular corrugation, and the height of the triangular corrugation is 15mm. The included angle is 50°;

Finish rolling: the double-sided triangular corrugated composite plate after rough rolling is sent to the four-roll composite finish rolling mill for rolling, as shown in Figure 9, the four-roll composite finish mill work rolls 5, 6 and backup rolls are all smooth flat rolls. Roll on the four-roller finishing mill until the rough-rolled composite plate with double-sided oblique corrugation is rolled into a double-sided flat 12mm thick composite plate, as shown in Figure 10; then roll on the six-roller finishing mill to obtain a 1mm thick composite plate thin strip;

Finally, the edges are trimmed, heat treated, and leveled to make the finished product.

The above-mentioned embodiment uses oblique corrugated corrugated rolls to solve the problem of instantaneous impact during rolling of transverse corrugated rolls and the deviation of the strip due to axial force during rolling of longitudinal corrugated rolls, and at the same time increases the number of corrugated composites after rough rolling. The bonding area of the board increases, thereby increasing the bonding force between the base layer and the composite layer, and greatly improving the composite strength and composite efficiency of the composite board.

Claims (4)

1. a kind of method of oblique ripple roll Rolling compund strip, it is characterised in that comprise the following steps：

1）Base:Metal substrate and metal compound plate are chosen, the resistance of deformation of the compound plate is more than the resistance of deformation of substrate, cleaning The surface that substrate and compound plate are combined, until seeing metallic matrix；By substrate and compound plate closed assembly, base in order, answered Plywood base；

2）Roughing：Composite plate blanks are rolled out on composite surface by the compound roughing mill equipped with oblique ripple roll and answered with oblique ripple The oblique ripple in conjunction face is combined boards half-finished product, and the axial angle of the oblique ripple and roll is（10-80）°；Compound plate after roughing Composite surface wave height and substrate composite surface wave height are compound plate thickness（0.1-1.5）Times, the compound plate corrugated surface after roughing Waviness width is wave height（3-20）Times；The overall ripple cross sectional shape and the ripple of basic unit's composite surface of cladding after roughing Cross sectional shape is circular arc, sinusoidal waveform, triangle or rectangle；

3）Finish rolling：The compound boards half-finished product that the cladding that roughing is rolled out has overall oblique ripple is offseted simultaneously by compound finishing mill Required thickness is rolled down to, finished product complex plate strip is obtained；

4）Finishing：The composite plate that finish rolling is shut out is heat-treated, leveling, segmentation.

2. a kind of method of oblique ripple roll Rolling compund strip according to claim 1, it is characterised in that：It is described multiple Plate is one piece, and the compound roughing mill is the duo mill that a roll is oblique ripple surface, a roll is smooth surface, is made Oblique ripple roll is contacted with compound plate, and smooth surface roll is contacted with substrate, is rolled.

3. a kind of method of oblique ripple roll Rolling compund strip according to claim 1, it is characterised in that：It is described multiple Plate is two pieces, positioned at the substrate top and bottom, and the compound roughing mill is duo mill of two rolls all for oblique ripple surface, Oblique ripple roll is contacted with compound plate up and down, rolled.

4. a kind of method of oblique ripple roll Rolling compund strip according to claim any one of 1-3, its feature exists In：Carry out hot rolling, step 1）In the base process be：The substrate and compound plate of closed assembly are sent into forcing press to compress, in closed assembly Composite plate around postwelding submerged-arc welding welded encapsulation is first put with riser, take out true in the composite plate blank end drilling being welded Sky, then closes the hole, obtains composite plate blanks；In step 2）In, i.e., before roughing, composite plate blanks after the assay was approved are sent to Heating furnace, is heated to rolling temperature, is sent to roughing mill roughing；Or carry out cold rolling, step 1）In the base process For：The substrate and compound plate of closed assembly are sent into forcing press to compress, with the first spot welding of riser around the composite plate of closed assembly, composite plate is obtained Base；In step 2）In, i.e., before roughing, qualified composite plate blanks will be examined to be sent to cleaning equipment cleaning, roughing is then sent to again Machine roughing.