阅读说明：本技术 一种采用连铸连轧方式制备金属复合板的装置和方法 (Device and method for preparing metal composite plate by adopting continuous casting and rolling mode ) 是由 张庆丰 焦四海 于 2018-06-29 设计创作，主要内容包括：本发明的一种采用连铸连轧方式制备金属复合板的装置和方法将用于单一材质生产的连铸、轧制、热处理手段与复合板带的连续、规模化生产很好的结合,大幅度提高了复合板生产效率。本发明可进行不同厚度规格的单面或双面复合板生产,基层或复层材料可选择范围宽泛,包括碳钢、不锈钢、特种合金、钛、铜等。本发明实现了复合板连铸连轧,节约能耗,降低成本。(The device and the method for preparing the metal composite plate by adopting the continuous casting and rolling mode well combine the continuous casting, rolling and heat treatment means for producing single materials with the continuous and large-scale production of the composite plate strip, and greatly improve the production efficiency of the composite plate. The invention can be used for producing single-sided or double-sided composite boards with different thickness specifications, and the selection range of the base layer or the composite layer materials is wide, including carbon steel, stainless steel, special alloy, titanium, copper and the like. The invention realizes the continuous casting and rolling of the composite plate, saves energy consumption and reduces cost.)

1. The utility model provides an adopt device of continuous casting and rolling mode preparation metal clad sheet, includes the base metal supply apparatus who comprises decoiler (1), pinch roll (2), shot-blasting machine (3), welding equipment (4), welding pinch roll (5), induction heating device (6) and guide roll (7), its characterized in that:

the device comprises a base material supply device and a molten steel supply device, wherein the base material supply device comprises two parts, two base material plate strips (A) can be conveyed to a crystallizer (8) through uncoilers (1), pinch rollers (2), shot blasting machines (3), a welding device (4), welding pinch rollers (5), an induction heating device (6) and guide rollers (7) of different lines, the base material plate strips are compounded with the molten steel, the base material plate strips enter from the upper part of the crystallizer along the inner walls of two sides in the crystallizer and penetrate through from the lower part, two sides of the crystallizer on the inner wall are sealed by side sealing plates, a tundish (9) for casting the molten steel is arranged above the crystallizer, the molten steel in the tundish flows into the crystallizer and is contacted with the base material plate strips in the crystallizer, and preliminary melting;

the base metal plate strip (A) is primarily fused and compounded to form a composite plate blank (B), then the base metal plate strip passes through the lower part of a crystallizer (8) and is cooled by a second cooling section (10) with water spray cooling arranged at an outlet at the lower part of the crystallizer, a leveling roller (11) is arranged behind the second cooling section, a rolling mill (12) used for manufacturing the composite plate blank into composite plate strips (C) with different sizes and specifications is arranged behind the leveling roller, an online cooling device (13) used for the composite plate strip is arranged behind the rolling mill, a straightening machine (14) is arranged at an outlet of the online cooling device, and the straightened composite plate strip is cut to a fixed length by a set fixed length shear (15) or is coiled by a coiling machine (16).

2. The method for preparing the metal composite plate by adopting the continuous casting and rolling way is based on the device for preparing the metal composite plate by adopting the continuous casting and rolling way disclosed by the claim 1, and comprises the following specific steps of:

1) uncoiling a base metal plate strip (A) with the thickness of 2-25 mm through an uncoiler (1), directly conveying the base metal plate strip with the thickness of 26-100 mm to an impeller head (3) through a pinch roll (2) for surface cleaning, and welding the front end and the rear end of the base metal plate strip through welding equipment (4) after the impeller head is shot, so that continuous plate supply of the base metal plate strip is realized;

2) the welded base metal plate strip is sent into an induction heating device (6) through a welding pinch roll (5) to be heated, nitrogen or argon is introduced into the induction heating device for protection, the heating temperature is 100-1200 ℃, the heating speed is 1-50 ℃/s according to different thicknesses, and the base metal plate strip is made of carbon steel, stainless steel, special alloy, titanium, copper and other metals, so that the base metal plate strip is easily combined with base metal melt in the subsequent steps, and the metal melting on the surface of the base metal is promoted;

3) the heated base metal plate strip is fed into a crystallizer (8) through a guide roller (7) at a certain speed, the base metal plate strip enters from the upper part of the crystallizer along the inner walls of two sides of the crystallizer and passes through from the lower part, the speed when the base metal plate strip passes through is 0.1-30 m/min, meanwhile, base layer molten metal in a tundish (9) is also injected into the crystallizer, argon is blown to the surface of the crystallizer to reduce the oxidation of the base layer molten metal, the temperature of the base layer molten metal is 30-150 ℃ higher than the melting point of the base metal plate strip, the base layer molten metal is a metal solution of carbon steel, stainless steel, special alloy, titanium, copper and the like, the high-temperature base layer molten metal is in contact with the surface of the base metal plate strip at a relatively low temperature, so that the surface of the base metal plate strip is slightly melted, the base layer molten metal strip is solidified on the surface when meeting, finally forming a composite plate blank (B), wherein a single base plate strip penetrating through the inner wall of one side of the crystallizer can form a single-sided composite plate blank, and two base plate strips penetrating through the inner walls of two sides of the crystallizer can form a double-sided composite plate blank;

4) the composite plate blank (B) formed in the crystallizer is discharged from the crystallizer from the lower part of the crystallizer and then enters a second cooling section (10), cooling water is sprayed on the upper surface and the lower surface of the plate blank of the second cooling section, so that the composite plate blank which is not completely solidified is further solidified, and simultaneously, the composite plate blank is rapidly cooled to prevent crystal grains generated by surface solidification from growing and coarsening;

5) the further cooled composite plate blank (B) is leveled by a leveling roller (11) and then enters a rolling mill (12) to be rolled into composite plate strips (C) with different thickness specifications of 0.5-100 mm, the composite interface of the composite plate strips is further compressed and deformed at high temperature in the rolling process, the composite interface structure is recovered and recrystallized, and the secondary compounding of the interface is promoted by the growth of crystal grains and the diffusion of elements at high temperature;

6) the rolled composite plate strip (C) can be cooled on line by selecting an on-line cooling device (13) according to the product performance requirement, the on-line cooling speed is 1-60 ℃/s according to the product thickness, and the final cooling temperature is 50-600 ℃;

7) the cooled composite board (C) enters a straightener (14) for straightening, and is cut to length by a length-fixing shear (15) or coiled by a coiling machine (16) according to actual requirements after being straightened.

Technical Field

The invention relates to the field of ferrous metallurgy production, in particular to a device and a method for preparing a metal composite plate by adopting a continuous casting and rolling mode, which can be used for producing metal composite plate products with different material combinations.

Background

Along with the development of modern science and technology and national economy, users have more and more rigorous requirements on the performance of materials, a single metal material is difficult to meet the performance requirements in various aspects in the actual use process, and a metal composite material with both functionality and structure is produced at the same time, plays an important role in meeting the personalized requirements of users, and is more and more concerned and used by the broad masses of users. The following methods and apparatuses are more common for manufacturing composite sheet strips:

1. explosion cladding: cleaning the contact surfaces of two different metal materials, adding explosives into the interfaces, and welding the two metal materials by utilizing the instantaneous high temperature generated by explosion, wherein the combination is not sufficient, the composite strength is lower, and the method is suitable for single-piece and small-batch production;

2. rolling and compounding: the composite surface of stainless steel and carbon steel is cleaned, the periphery is vacuumized and welded after the composite surface is aligned, and then the composite manufacturing method is completed through heating and rolling, so that the composite material is fully combined, has high composite strength and low production efficiency, and is suitable for single-piece and small-batch production;

3. centrifugal casting compounding: the carbon steel and the stainless steel molten steel are sequentially added into a centrifuge, annular composite plates, pipes and the like can be sequentially considered through the carbon steel and the stainless steel molten steel, and then the processes of straightening, heating, rolling and the like are carried out.

The prior ideal composite process is a rolling composite method, the interface of the produced composite plate realizes complete metallurgical bonding, the bonding strength is high, the product performance is excellent, but the assembly efficiency is low, the assembly process comprises a plurality of working procedures, the continuous, automatic and large-scale production is difficult to realize, and the cost is high. In recent years, several processes and methods for continuously producing composite plates such as continuous casting and continuous rolling of composite plates, thin strip continuous casting and the like have appeared, for example, patent CN1714957A introduces a composite plate, strip production method and equipment of different metal materials, by using 2-3 carbon steel or stainless steel water crystallizers to work simultaneously on the same continuous casting machine, the continuous casting and continuous rolling of single-side composite plates and strips of different metal materials are realized, the crystallizer is composed of four steel strips which move synchronously and circularly up and down and left and right, and the form of the former crystallizer is changed. The composite layer and the base layer metal are both formed by solidifying liquid metal in the crystallizer.

Patent CN101780532A describes a continuous casting method for liquid phase composite plate blank, which comprises injecting the molten metal of base layer and the molten metal of multiple layers into the roller crystallizer molten pool formed by the crystallizing roller and the side sealing plate, wherein the molten pool is divided into a base layer molten pool and a multiple layer molten pool by the middle partition plate, and the composite plate blank formed in the crystallizer is formed after being straightened and sized. The defects that the clad layer and the base layer are both formed by simultaneously solidifying molten steel, the control difficulty of the joint surface is high, and the two molten steels are not mixed and are not supercooled and combined.

Patent CN104249135A describes a method for preparing a double-roll thin strip of a composite plate strip, which is to send an intermediate plate strip into a molten pool of a double-roll thin strip continuous casting, so that molten metal is rapidly solidified under the cooling action of a crystallization roll and the intermediate plate strip to form a single-sided or double-sided composite plate strip; similarly, patent CN103495618A describes a casting-rolling composite production apparatus and method for metal composite plate, which is to send the mother plate to be composite into the molten pool of the strip caster, the metal liquid to be composite in the molten pool is solidified on the surface of the mother plate, and after leaving the crystallizer, the mother plate is cooled, leveled and rolled to obtain the composite plate strip. Both of the two methods are based on thin-strip continuous casting technology, the prepared product is mainly thin-specification strip materials, and the solidified multiple layers have limited thickness, so that the method is not suitable for preparing thick-specification multiple-layer composite strips.

Patent CN102039309A describes a method for continuously casting and rolling thin strip with a double-roller double-strip composite structure, in which two mother strips surround a crystallizing roller, the crystallizing roller and the mother strips form a molten pool, a metal solution in the molten pool forms a composite cast strip together with the two mother strips after solidification, and the composite cast strip is formed after rolling by a rolling mill. In the method, the multilayer metal is a steel belt, and the base layer is formed by solidifying molten steel.

Patent CN105215307A describes a process and an apparatus for producing a double-layer composite board, which is a method for producing a composite board by sequentially solidifying different materials through two tundishes and two crystallizers. And (3) feeding the casting blank solidified in the first crystallizer into a second crystallizer to enable a second material to adhere to the surface of the casting blank to be solidified, and producing the single-sided composite board through the working procedures of secondary cooling, rolling and the like.

Patent CN1141962A describes a continuous production method of reverse solidification composite plate strip, which is characterized in that a mother strip is uncoiled, descaled and passivated, then preheated at 200-1000 ℃, and then molten metal entering a crystallization tank is subjected to continuous thermal compounding.

The above patents are all new technologies developed for improving the production efficiency of composite boards and realizing continuous production, and each of them has some disadvantages.

Disclosure of Invention

The invention provides a device and a method for preparing a metal composite plate by adopting a continuous casting and rolling mode, which can improve the production efficiency of the composite plate and reduce the production cost.

The invention relates to a device and a method for preparing a metal composite plate by adopting a continuous casting and rolling mode, wherein the device part and the specific steps are as follows:

the utility model provides an adopt device of continuous casting and rolling mode preparation metal clad sheet, includes the base metal supply apparatus who comprises decoiler, pinch roll, shot-blasting machine, welding equipment, welding pinch roll, induction heating device and guide roll, its characterized in that:

the device comprises a base material supply device and a molten steel supply device, wherein the base material supply device comprises two parts, two base material plate strips can be conveyed to a crystallizer for realizing the compounding of a base material and molten steel through an uncoiler, a pinch roll, a shot blasting machine, a welding device, a welding pinch roll, an induction heating device and a guide roll of different lines, the base material plate strips enter from the upper part of the crystallizer along the inner walls of two sides in the crystallizer and pass through from the lower part, the two sides of the crystallizer of the inner walls are sealed by side sealing plates, a tundish for casting molten steel is arranged above the crystallizer, and the molten steel in the tundish flows into the crystallizer and contacts with the base material plate strips in the crystallizer to;

the base material plate and strip are initially melted and compounded to form a composite plate blank, then the composite plate blank passes through the lower part of the crystallizer and is cooled by a second cooling section with water spray cooling arranged at an outlet at the lower part of the crystallizer, a leveling roller is arranged behind the second cooling section, a rolling mill for manufacturing the composite plate blank into composite plate strips with different sizes and specifications is arranged behind the leveling roller, an online cooling device for the composite plate strips is arranged behind the rolling mill, a straightening machine is arranged at an outlet of the online cooling device, and the straightened composite plate strips are cut to length by a set length shear or coiled by a coiling machine.

A method for preparing a metal composite plate by adopting a continuous casting and rolling mode is based on the device for preparing the metal composite plate by adopting the continuous casting and rolling mode, and the method comprises the following specific steps:

1) uncoiling a base metal plate strip with the thickness of 2-25 mm by an uncoiler, directly conveying the base metal plate strip with the thickness of 26-100 mm to an impeller blasting machine through a pinch roll for surface cleaning, and welding the front end and the rear end of the base metal plate strip by the shot blasting equipment to realize continuous plate supply of the base metal plate strip;

2) the welded base metal plate strip is sent into an induction heating device through a welding pinch roll to be heated, nitrogen or argon is introduced into the induction heating device for protection, the heating temperature is 100-1200 ℃, the heating speed is 1-50 ℃/s according to different thicknesses, and the base metal plate strip is made of carbon steel, stainless steel, special alloy, titanium, copper and other metals, so that the base metal plate strip is easily combined with base metal melt in the subsequent steps, and the melting of metal on the surface of the base metal is promoted;

3) the heated base metal plate strip is fed into a crystallizer through a guide roller at a certain speed, the base metal plate strip enters from the upper part of the crystallizer along the inner walls of two sides of the crystallizer and passes through from the lower part, the speed when the base metal plate strip passes through is 0.1-30 m/min, meanwhile, base layer metal melt in a tundish is also injected into the crystallizer, argon is blown to the surface of the crystallizer to reduce the oxidation of the base layer metal melt, the temperature of the base layer metal melt is 30-150 ℃ higher than the melting point of the base metal plate strip, the base layer metal melt is metal solution of carbon steel, stainless steel, special alloy, titanium, copper and the like, the high-temperature base layer metal melt is in contact with the surface of the base metal plate strip at a relatively low temperature, so that the surface of the base metal plate strip is slightly melted, the base layer metal melt is solidified on the surface of the base metal plate, finally forming a composite plate blank, wherein a single base plate strip penetrating through the inner wall of one side of the crystallizer can form a single-sided composite plate blank, and two base plate strips penetrating through the inner walls of two sides of the crystallizer can form a double-sided composite plate blank;

4) the composite plate blank formed in the crystallizer is discharged from the crystallizer from the lower part of the crystallizer and then enters a secondary cooling section, cooling water is sprayed on the upper surface and the lower surface of the plate blank of the secondary cooling section, so that the composite plate blank which is not completely solidified is further solidified, and simultaneously, the composite plate blank is rapidly cooled to prevent crystal grains generated by surface solidification from growing and coarsening;

5) the further cooled composite plate blank is leveled by a leveling roller and then enters a rolling mill to be rolled into composite plate strips with different thickness specifications of 0.5-100 mm, the composite interface of the composite plate strips is further compressed and deformed at high temperature in the rolling process, the composite interface structure is recovered and recrystallized, and the secondary compounding of the interface is promoted by the growth of crystal grains and the diffusion of elements at high temperature;

6) the rolled composite plate strip can be cooled on line by selecting an on-line cooling device according to the product performance requirement, the on-line cooling speed is 1-60 ℃/s according to the product thickness, and the final cooling temperature is 50-600 ℃;

7) and (4) straightening the cooled composite board in a straightening machine, and cutting the composite board to a fixed length by using a fixed length shear or coiling the composite board by using a coiling machine according to actual needs after straightening.

The device and the method for preparing the metal composite plate by adopting the continuous casting and rolling mode have the following beneficial effects that:

1) according to the device and the method for preparing the metal composite plate in the continuous casting and rolling mode, continuous casting, rolling and heat treatment means for single material production are well combined with continuous and large-scale production of the composite plate strip, so that the production efficiency of the composite plate is greatly improved;

2) the device and the method for preparing the metal composite plate by adopting the continuous casting and rolling mode can be used for producing single-sided or double-sided composite plates with different thickness specifications, and the selection range of the base layer or the composite layer materials is wide, and the base layer or the composite layer materials comprise carbon steel, stainless steel, special alloy, titanium, copper and the like;

3) the device and the method for preparing the metal composite plate by adopting the continuous casting and rolling mode realize the continuous casting and rolling of the composite plate, save energy consumption and reduce cost.

Drawings

Fig. 1 is a schematic structural diagram of a device part of the device and the method for preparing the metal composite plate by adopting the continuous casting and rolling mode.

In the figure: 1-uncoiler, 2-pinch roll, 3-shot blasting machine, 4-welding equipment, 5-welding pinch roll, 6-induction heating device, 7-guide roll, 8-crystallizer, 9-tundish, 10-secondary cooling section, 11-leveling roll, 12-rolling mill, 13-online cooling device, 14-straightener, 15-shear, 16-coiler, A-base metal plate strip, B-composite plate blank and C-composite plate strip.

Detailed Description

The following describes an apparatus and a method for manufacturing a metal composite plate by continuous casting and rolling according to the present invention with reference to the accompanying drawings and examples.