CN113798786A - Preparation method of bimetal composite board - Google Patents
Preparation method of bimetal composite board Download PDFInfo
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- CN113798786A CN113798786A CN202111000123.1A CN202111000123A CN113798786A CN 113798786 A CN113798786 A CN 113798786A CN 202111000123 A CN202111000123 A CN 202111000123A CN 113798786 A CN113798786 A CN 113798786A
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- 239000002131 composite material Substances 0.000 title claims abstract description 78
- 238000002360 preparation method Methods 0.000 title claims abstract description 10
- 238000003466 welding Methods 0.000 claims abstract description 106
- 238000000034 method Methods 0.000 claims abstract description 64
- 239000002184 metal Substances 0.000 claims abstract description 60
- 229910052751 metal Inorganic materials 0.000 claims abstract description 60
- 238000001816 cooling Methods 0.000 claims abstract description 48
- 230000008569 process Effects 0.000 claims abstract description 34
- 238000005096 rolling process Methods 0.000 claims abstract description 30
- 239000010953 base metal Substances 0.000 claims abstract description 29
- 238000010438 heat treatment Methods 0.000 claims abstract description 8
- 239000002893 slag Substances 0.000 claims description 39
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 33
- 230000004927 fusion Effects 0.000 claims description 22
- 238000002844 melting Methods 0.000 claims description 17
- 230000004907 flux Effects 0.000 claims description 14
- 239000000498 cooling water Substances 0.000 claims description 12
- 230000008018 melting Effects 0.000 claims description 12
- 238000005098 hot rolling Methods 0.000 claims description 9
- 230000015572 biosynthetic process Effects 0.000 claims description 6
- 239000003795 chemical substances by application Substances 0.000 claims description 6
- 230000009467 reduction Effects 0.000 claims description 6
- 229910000831 Steel Inorganic materials 0.000 claims description 2
- 238000005097 cold rolling Methods 0.000 claims description 2
- 238000007781 pre-processing Methods 0.000 claims description 2
- 239000010959 steel Substances 0.000 claims description 2
- 238000004381 surface treatment Methods 0.000 claims description 2
- 230000000977 initiatory effect Effects 0.000 claims 1
- 238000007711 solidification Methods 0.000 abstract description 4
- 230000008023 solidification Effects 0.000 abstract description 4
- 238000000465 moulding Methods 0.000 abstract description 3
- 239000002699 waste material Substances 0.000 abstract description 3
- 239000010970 precious metal Substances 0.000 abstract description 2
- 230000035515 penetration Effects 0.000 abstract 1
- 229910000975 Carbon steel Inorganic materials 0.000 description 9
- 239000010962 carbon steel Substances 0.000 description 9
- 238000005476 soldering Methods 0.000 description 9
- 238000013329 compounding Methods 0.000 description 5
- 230000007704 transition Effects 0.000 description 5
- 239000010963 304 stainless steel Substances 0.000 description 4
- 229910000589 SAE 304 stainless steel Inorganic materials 0.000 description 4
- 238000011109 contamination Methods 0.000 description 4
- JEIPFZHSYJVQDO-UHFFFAOYSA-N iron(III) oxide Inorganic materials O=[Fe]O[Fe]=O JEIPFZHSYJVQDO-UHFFFAOYSA-N 0.000 description 4
- 230000007246 mechanism Effects 0.000 description 4
- 238000005554 pickling Methods 0.000 description 4
- 238000003825 pressing Methods 0.000 description 4
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 description 2
- 150000001875 compounds Chemical class 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 239000007787 solid Substances 0.000 description 2
- 239000000243 solution Substances 0.000 description 2
- 238000006467 substitution reaction Methods 0.000 description 2
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- 239000000654 additive Substances 0.000 description 1
- 230000000996 additive effect Effects 0.000 description 1
- 238000009750 centrifugal casting Methods 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- 239000010949 copper Substances 0.000 description 1
- 239000013078 crystal Substances 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000010790 dilution Methods 0.000 description 1
- 239000012895 dilution Substances 0.000 description 1
- 238000010891 electric arc Methods 0.000 description 1
- 238000003912 environmental pollution Methods 0.000 description 1
- 239000002360 explosive Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 150000002739 metals Chemical class 0.000 description 1
- 229910052759 nickel Inorganic materials 0.000 description 1
- 239000010935 stainless steel Substances 0.000 description 1
- 229910001220 stainless steel Inorganic materials 0.000 description 1
Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23P—METAL-WORKING NOT OTHERWISE PROVIDED FOR; COMBINED OPERATIONS; UNIVERSAL MACHINE TOOLS
- B23P15/00—Making specific metal objects by operations not covered by a single other subclass or a group in this subclass
Abstract
The invention belongs to the technical field of composite material molding, and particularly relates to a preparation method of a bimetal composite plate. The method of the invention uses the multilayer metal as the welded piece, uses the base metal as the self-fluxing electrode, and carries out welding by controlling the cooling temperature of the welding line in real time, and carries out rolling and heat treatment processes after the welding is finished, so as to prepare the bimetal composite plate. The method can adjust the composite layer penetration as required, thereby reducing the waste of the precious metal of the composite layer while controlling the composite strength; the method can improve the solidification structure and improve the impact toughness of the welding seam.
Description
Technical Field
The invention belongs to the technical field of composite material molding, and particularly relates to a preparation method of a bimetal composite plate.
Background
The bimetal composite board is a novel composite material prepared by compounding two metals with different properties, and integrates the functionality of a composite material and the structural property of a base material.
The existing bimetal composite board process mainly comprises a mechanical composite method and a metallurgical composite method, wherein the mechanical composite method has poor bonding strength and low processing performance; the metallurgical compounding process mainly comprises a hot rolling solidification method, a centrifugal casting method and explosive compounding, but the methods have various problems of cost, quality, yield, scale, environmental pollution and the like.
With the advent of additive manufacturing, welding composite processes have received attention in metallurgical composite processes. Common welding composite methods include arc welding, laser welding, and electroslag composite methods; the efficiency of electric arc welding and laser welding is extremely low; the electroslag compounding method has high efficiency, but the common electroslag compounding method has large equipment used when preparing the bimetal composite board and high requirement on a power supply (a transformer is often bought independently), the side mold is often a water-cooled crystallizer, the solid metal is spaced between the inner wall of the crystallizer and a molten pool, the cooling capacity is difficult to reach a compound transition layer through the solid metal, and the compound transition layer often wastes the multilayer metal due to the fact that the melting depth of the transition layer is too large, and solidification defects are caused.
The horizontal electroslag surfacing composite process horizontally surfacing composite layers on the surfaces of basic weldments has low efficiency and high dilution rate of as-cast composite layers, thin and uniform surfacing layers are not easy to obtain, and the nearby welding seams are easy to overheat to generate overheat tissues, namely the welding seam metal is in as-cast tissues of coarse crystals, so that the impact toughness of the welding seams is low.
Disclosure of Invention
The invention mainly aims to provide a method for preparing a bimetal composite plate, which adopts electroslag vertical welding and rolling processes to prepare the bimetal composite plate for the first time.
In order to achieve the purpose, the invention adopts the following technical scheme:
the invention provides a preparation method of a bimetal composite plate, which comprises the following steps: preprocessing the base metal and the multilayer metal; placing the multilayer metal and the base metal in a detachable water-cooled crystallizer, preparing an arc striking block or an arc striking agent for arc striking, performing electroslag vertical welding after arc striking, taking the base metal as a self-fluxing electrode, and keeping the base metal perpendicular to a weldment in the welding process; the base metal is melted and molded from bottom to top in a melting cavity formed between the base metal and the multilayer metal after being melted by resistance generated when current passes through slag, and generates a welding seam with the multilayer metal, and the welding seam is cooled in real time so as to control the melting depth of the composite layer; after the molten metal forms a solidified shell, cooling the solidified shell to obtain an as-cast composite plate blank; rolling the as-cast composite plate blank; and (4) carrying out heat treatment and surface treatment after rolling treatment to obtain the product. The slag pool is cooled and controlled in real time, so that the composite layer melting depth can be effectively controlled; the cooling control of the solidified shell can improve the impact toughness of the welding seam.
Further, cooling the welding line by adopting a cooling slide block around the welding line; the cooling slide block is hollow and filled with cooling water; the top of the cooling slide block is provided with a water inlet and a water outlet, and the temperature of the cooling slide block is adjusted by controlling the flow rate and the temperature of cooling water; the water outlet temperature of the cooling slide block is less than or equal to 80 ℃; the cooling slide block is gradually lifted from bottom to top along with the formation of the welding seam.
Furthermore, the cooling slide block is made of metal.
Furthermore, the water inlet temperature of the crystallizer is less than or equal to 35 ℃, and the water outlet temperature of the crystallizer is less than or equal to 55 ℃.
Further, the voltage during arc striking is 3-8V higher than the welding voltage.
Furthermore, when electroslag welding is carried out, the welding speed is controlled to be 0.6-2m/h, and the depth of a slag pool formed in the welding process is 35-70 mm; the base metal is always kept in the central position of the melting cavity in the welding process.
Furthermore, in the welding process, when the slag pool is turned and rolled greatly, the soldering flux is added; in the welding process, the temperature of the interface of the multilayer metal and the temperature near the interface is kept above 800 ℃.
Further, cooling the solidified shell by using cold water, wherein the consumption of the cold water is 1.0-1.2L/kg of steel.
Further, the rolling treatment comprises hot rolling and cold rolling treatment; furthermore, the cast composite slab is rolled by adopting two-roller hot rolling, the first rolling reduction is 10-15%, and the final rolling temperature is controlled at 800-900 ℃.
Further, the base metal includes, but is not limited to, carbon steel, and the clad metal includes, but is not limited to, stainless steel/nickel-based composite metal.
The invention also provides the bimetal composite board prepared by the method.
The method of the invention uses the multilayer metal as the welded piece, uses the base metal as the self-fluxing electrode, and carries out welding by controlling the cooling temperature of the welding line in real time, and carries out rolling and heat treatment processes after the welding is finished, so as to obtain the bimetal composite plate.
Compared with the prior art, the invention has the following advantages:
the method can adjust the fusion depth of the composite layer as required, further can control the composite strength and reduce the waste of the precious metal of the composite layer. The method of the invention can also improve the solidification structure and improve the impact toughness of the welding seam.
Detailed Description
It is to be understood that the following detailed description is exemplary and is intended to provide further explanation of the invention as claimed. Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs.
It is noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of exemplary embodiments according to the invention. As used herein, the singular forms "a", "an" and "the" are intended to include the plural forms as well, and it should be understood that when the terms "comprises" and/or "comprising" are used in this specification, they specify the presence of the stated features, steps, operations, and/or combinations thereof, unless the context clearly indicates otherwise.
In order to make the technical solutions of the present invention more clearly understood by those skilled in the art, the technical solutions of the present invention will be described in detail below with reference to specific embodiments.
In the following embodiments, the cooling slider is made of copper.
Example 1
A preparation method of the bimetal composite plate comprises the following steps:
s1: for the base metal Q235 carbon steel; multilayer metal: 1 304 stainless steel plate (330X 490X 40 mm-thickness 40mm) was pretreated, including rust and oil removal and other contamination of the weld face.
S2: using multi-wire electroslag welding with Q235
The carbon steel is used as a wire-level self-melting electrode which is melted to be base metal, and the electrode is straightened by the straightening guide mechanism and is kept vertical to the weldment.
S3: the method comprises the following steps that a composite layer metal and a base layer metal are arranged on two sides of a detachable water-cooled crystallizer, an arc striking block or an arc striking agent is prepared for arc striking, electroslag vertical welding is carried out by multiple wires after arc striking, the base layer metal is formed in a melting cavity formed between the base layer metal and the composite layer metal from bottom to top after being melted by resistance generated when current passes through slag, a fusion welding seam is formed between the base layer metal and the composite layer metal, and the periphery of the welding seam is cooled by a cooling slide block; the cooling slide block is hollow and filled with cooling water; the top of the cooling slide block is provided with a water inlet and a water outlet, and the temperature of the cooling slide block is adjusted by controlling the flow rate and the temperature of cooling water; the water outlet temperature of the cooling slide block is less than or equal to 80 ℃; the cooling slide block is gradually lifted from bottom to top along with the formation of the welding seam. The thickness ratio of the clad metal to the welding seam is 1: 3; the water inlet temperature of the crystallizer is less than or equal to 35 ℃, and the water outlet temperature is less than or equal to 55 ℃.
During arc striking, the voltage is set to be 38V, and the welding voltage is set to be 35V after a slag pool is formed. In the welding process, a slag pool is formed, and each fusion welding parameter needs to be adjusted in time to meet the requirement. The welding speed is controlled to be l.5m/h; the wire feeding pole speed is 55 m/h; the depth of the slag pool is 35 mm; in the welding process, whether the electrode is in the center of the region to be formed or not is checked at any time, and the electrode is strictly prevented from being over-deviated.
The hot state of the weldment is inspected at any time during the welding process, the fusion of the multilayer metal interface and the temperature near the interface is good when the temperature is above 800 ℃, and when the temperature is below 800 ℃, the welding process parameters are properly adjusted to properly increase the total heat in the slag bath.
When the slag pool is turned over greatly and rolls greatly or even open arcs appear, the soldering flux can be added, the adding of the soldering flux is carried out on the principle of less and slow speed, and the adding is suspended when the slag pool is restored to a calm and stable state. The flux was baked at 250 ℃ for 4 hours before use.
And when the slag pool rises to be approximately level with the upper opening of the arc extinguishing block, pressing a stop button on the welding machine to stop working, and finishing welding to obtain the as-cast composite plate blank.
S4: after obtaining the as-cast composite slab, send to
Rolling by a high-rigidity two-roller hot rolling experimental rolling mill, wherein the first rolling reduction is 10%, and the final rolling temperature is controlled at 880 ℃.
S5: the hot-rolled composite plate is subjected to heat treatment and surface pickling treatment to form a finished composite plate.
In the embodiment 1, the thickness of the fusion layer of the composite plate blank is 2.9mm, the thickness of the fusion transition layer after rolling is 0.27mm, the shear strength of the obtained composite plate is 383MPa, and the fusion rate is 99.3%.
Example 2
A preparation method of the bimetal composite plate comprises the following steps:
s1: for base metal Q235 carbon steel, multilayer metal: 2 pieces of 304 stainless steel plates (330X 490X 40 mm-thickness 40mm) were pretreated, including rust and oil removal and other contamination of the weld faces.
S2: using multi-wire electroslag welding with Q235
The carbon steel is used as a wire-level self-melting electrode, and the electrode is straightened by the straightening guide mechanism and is kept vertical to the weldment.
S3: placing the multilayer metal on two sides of a detachable water-cooled crystallizer, preparing an arc striking block or an arc striking agent for striking an arc, performing electroslag welding with the multilayer metal by a multi-wire base metal self-melting electrode after striking the arc, melting and molding the base metal from bottom to top in a melting cavity formed between the base metal and the multilayer metal after the base metal is melted by resistance generated when current passes through slag, generating a fusion welding seam with the multilayer metal, and cooling the welding seam by adopting a cooling slide block around the welding seam; the cooling slide block is hollow and filled with cooling water; the top of the cooling slide block is provided with a water inlet and a water outlet, and the temperature of the cooling slide block is adjusted by controlling the flow rate and the temperature of cooling water; the water outlet temperature of the cooling slide block is less than or equal to 80 ℃; the cooling slide block is gradually lifted from bottom to top along with the formation of the welding seam. The thickness ratio of the clad metal to the welding seam is 1: 5; the water inlet temperature of the crystallizer is less than or equal to 35 ℃, and the water outlet temperature is less than or equal to 55 ℃.
During arc striking, the voltage is set to 63V, and the welding voltage is set to 55V after a slag pool is formed. In the welding process, a slag pool is formed, and each fusion welding parameter needs to be adjusted in time to meet the requirement. The welding speed is controlled to be 2 m/h; the wire feeding speed is 100 mm/h; the depth of the slag pool is 35 mm; in the welding process, whether the electrode is in the center of the region to be formed or not is checked at any time, and the electrode is strictly prevented from being over-deviated.
The hot state of the weldment is inspected at any time during the welding process, the fusion of the multilayer metal interface and the temperature near the interface is good when the temperature is above 800 ℃, and when the temperature is below 800 ℃, the welding process parameters are properly adjusted to properly increase the total heat in the slag bath.
When the slag pool is turned over greatly and rolls greatly or even open arcs appear, the soldering flux can be added, the adding of the soldering flux is carried out on the principle of less and slow speed, and the adding is suspended when the slag pool is restored to a calm and stable state. The flux was baked at 250 ℃ for 4 hours before use.
And when the slag pool rises to be approximately level with the upper opening of the arc extinguishing block, pressing a stop button on the welding machine to stop working, and finishing welding to obtain the as-cast composite plate blank.
S4: after obtaining the as-cast composite blank, sending to
Rolling by a high-rigidity two-roller hot rolling experimental rolling mill, wherein the first rolling reduction is 10%, and the final rolling temperature is controlled at 880 ℃.
S5: the hot-rolled composite plate is subjected to heat treatment and surface pickling treatment to form a finished composite plate.
In the embodiment 2, the thickness of the fusion layer of the composite plate blank is 3.1mm, the thickness of the fusion transition layer after rolling is 0.28mm, the shear strength of the obtained composite plate is 380MPa, and the fusion rate is 99.1%.
Example 3
A preparation method of the bimetal composite plate comprises the following steps:
s1: for the base metal Q235 carbon steel; multilayer metal: 1 304 stainless steel plate (330X 490X 40 mm-thickness 40mm) was pretreated, including rust and oil removal and other contamination of the weld face.
S2: using multi-wire electroslag welding with Q235
The carbon steel is used as a wire-level self-melting electrode which is melted to be base metal, and the electrode is straightened by the straightening guide mechanism and is kept vertical to the weldment.
S3: the method comprises the following steps that a composite layer metal and a base layer metal are arranged on two sides of a detachable water-cooled crystallizer, an arc striking block or an arc striking agent is prepared for arc striking, electroslag vertical welding is carried out by multiple wires after arc striking, the base layer metal is formed in a melting cavity formed between the base layer metal and the composite layer metal from bottom to top after being melted by resistance generated when current passes through slag, a fusion welding seam is formed between the base layer metal and the composite layer metal, and the periphery of the welding seam is cooled by a cooling slide block; the cooling slide block is hollow and filled with cooling water; the top of the cooling slide block is provided with a water inlet and a water outlet, and the temperature of the cooling slide block is adjusted by controlling the flow rate and the temperature of cooling water; the water outlet temperature of the cooling slide block is less than or equal to 80 ℃; the cooling slide block is gradually lifted from bottom to top along with the formation of the welding seam. The thickness ratio of the clad metal to the welding seam is 1: 3; the water inlet temperature of the crystallizer is less than or equal to 35 ℃, and the water outlet temperature is less than or equal to 55 ℃.
During arc striking, the voltage is set to be 38V, and the welding voltage is set to be 35V after a slag pool is formed. In the welding process, a slag pool is formed, and each fusion welding parameter needs to be adjusted in time to meet the requirement. The welding speed is controlled to be l.5m/h; the wire feeding pole speed is 55 m/h; the depth of the slag pool is 35 mm; in the welding process, whether the electrode is in the center of the region to be formed or not is checked at any time, and the electrode is strictly prevented from being over-deviated.
The hot state of the weldment is inspected at any time during the welding process, the fusion of the multilayer metal interface and the temperature near the interface is good when the temperature is above 800 ℃, and when the temperature is below 800 ℃, the welding process parameters are properly adjusted to properly increase the total heat in the slag bath.
When the slag pool is turned over greatly and rolls greatly or even open arcs appear, the soldering flux can be added, the adding of the soldering flux is carried out on the principle of less and slow speed, and the adding is suspended when the slag pool is restored to a calm and stable state. The flux was baked at 250 ℃ for 4 hours before use.
And when the slag pool rises to be approximately level with the upper opening of the arc extinguishing block, pressing a stop button on the welding machine to stop working, and finishing welding to obtain the as-cast composite plate blank.
S4: after obtaining the as-cast composite slab, send to
Rolling treatment is carried out by a high-rigidity two-roller hot rolling experimental rolling mill, the first rolling reduction is 12%, and the final rolling temperature is controlled at 800 ℃.
S5: the hot-rolled composite plate is subjected to heat treatment and surface pickling treatment to form a finished composite plate.
Example 4
A preparation method of the bimetal composite plate comprises the following steps:
s1: for the base metal Q235 carbon steel; multilayer metal: 1 304 stainless steel plate (330X 490X 40 mm-thickness 40mm) was pretreated, including rust and oil removal and other contamination of the weld face.
S2: using multi-wire electroslag welding with Q235
The carbon steel is used as a wire-level self-melting electrode which is melted to be base metal, and the electrode is straightened by the straightening guide mechanism and is kept vertical to the weldment.
S3: the method comprises the following steps that a composite layer metal and a base layer metal are arranged on two sides of a detachable water-cooled crystallizer, an arc striking block or an arc striking agent is prepared for arc striking, electroslag vertical welding is carried out by multiple wires after arc striking, the base layer metal is formed in a melting cavity formed between the base layer metal and the composite layer metal from bottom to top after being melted by resistance generated when current passes through slag, a fusion welding seam is formed between the base layer metal and the composite layer metal, and the periphery of the welding seam is cooled by a cooling slide block; the cooling slide block is hollow and filled with cooling water; the top of the cooling slide block is provided with a water inlet and a water outlet, and the temperature of the cooling slide block is adjusted by controlling the flow rate and the temperature of cooling water; the water outlet temperature of the cooling slide block is less than or equal to 80 ℃; the cooling slide block is gradually lifted from bottom to top along with the formation of the welding seam. The thickness ratio of the clad metal to the welding seam is 1: 3; the water inlet temperature of the crystallizer is less than or equal to 35 ℃, and the water outlet temperature is less than or equal to 55 ℃.
During arc striking, the voltage is set to be 38V, and the welding voltage is set to be 35V after a slag pool is formed. In the welding process, a slag pool is formed, and each fusion welding parameter needs to be adjusted in time to meet the requirement. The welding speed is controlled to be l.5m/h; the wire feeding pole speed is 55 m/h; the depth of the slag pool is 35 mm; in the welding process, whether the electrode is in the center of the region to be formed or not is checked at any time, and the electrode is strictly prevented from being over-deviated.
The hot state of the weldment is inspected at any time during the welding process, the fusion of the multilayer metal interface and the temperature near the interface is good when the temperature is above 800 ℃, and when the temperature is below 800 ℃, the welding process parameters are properly adjusted to properly increase the total heat in the slag bath.
When the slag pool is turned over greatly and rolls greatly or even open arcs appear, the soldering flux can be added, the adding of the soldering flux is carried out on the principle of less and slow speed, and the adding is suspended when the slag pool is restored to a calm and stable state. The flux was baked at 250 ℃ for 4 hours before use.
And when the slag pool rises to be approximately level with the upper opening of the arc extinguishing block, pressing a stop button on the welding machine to stop working, and finishing welding to obtain the as-cast composite plate blank.
S4: after obtaining the as-cast composite slab, send to
And (3) carrying out rolling treatment by using a high-rigidity two-roll hot rolling experimental rolling mill, wherein the first-pass reduction is 15%, and the final rolling temperature is controlled at 900 ℃.
S5: the hot-rolled composite plate is subjected to heat treatment and surface pickling treatment to form a finished composite plate.
The above embodiments are preferred embodiments of the present invention, but the present invention is not limited to the above embodiments, and any other changes, modifications, substitutions, combinations, and simplifications which do not depart from the spirit and principle of the present invention should be construed as equivalents thereof, and all such changes, modifications, substitutions, combinations, and simplifications are intended to be included in the scope of the present invention.
Claims (10)
1. The preparation method of the bimetal composite plate is characterized by comprising the following steps:
preprocessing the base metal and the multilayer metal; placing the multilayer metal and the base metal in a detachable water-cooled crystallizer, preparing an arc striking block or an arc striking agent for arc striking, performing electroslag vertical welding after arc striking, taking the base metal as a self-fluxing electrode, and keeping the base metal perpendicular to a weldment in the welding process; the base metal is melted and molded from bottom to top in a melting cavity formed between the base metal and the multilayer metal after being melted by resistance generated when current passes through slag, a fusion welding seam is generated between the base metal and the multilayer metal, and the fusion welding seam is cooled in real time to control the fusion depth of the composite layer; after the molten metal forms a solidified shell, cooling the solidified shell to obtain an as-cast composite plate blank; rolling the as-cast composite plate blank; and (4) carrying out heat treatment and surface treatment after rolling treatment to obtain the product.
2. The method of claim 1, wherein the weld is cooled around the weld using cooling blocks; the cooling slide block is hollow and filled with cooling water; the top of the cooling slide block is provided with a water inlet and a water outlet, and the temperature of the cooling slide block is adjusted by controlling the flow rate and the temperature of cooling water; the water outlet temperature of the cooling slide block is less than or equal to 80 ℃; the cooling slide block is gradually lifted from bottom to top along with the formation of the welding seam.
3. The method of claim 1 or 2, wherein the cooling slide is made of metal.
4. The method of claim 1, wherein the crystallizer feed water temperature is less than or equal to 35 ℃ and the crystallizer effluent water temperature is less than or equal to 55 ℃.
5. The method of claim 1, wherein the voltage at arc initiation is 3-8V higher than the voltage at welding.
6. The method according to claim 1, wherein when electroslag welding is performed, the welding speed is controlled to be 0.6-2m/h, and the depth of a slag bath is 35-70 mm; the base metal is always kept in the central position of the melting cavity in the welding process.
7. The method of claim 1, wherein during the welding process, the flux is added when the slag pool is turned and rolled greatly; in the welding process, the temperature of the interface of the multilayer metal and the temperature near the interface is kept above 800 ℃ in the welding process.
8. The method according to claim 1, wherein the solidified shell is cooled with cold water in an amount of 1.0 to 1.2L/kg steel.
9. The method of claim 1, wherein the rolling process comprises a hot rolling, a cold rolling process; preferably, the cast composite slab is rolled by adopting two-roller hot rolling, the first rolling reduction is 10-15%, and the final rolling temperature is controlled at 800-900 ℃.
10. A bimetallic composite panel produced by the method of any one of claims 1 to 9.
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114193107A (en) * | 2022-01-20 | 2022-03-18 | 青岛力晨新材料科技有限公司 | Method for manufacturing metal composite material by adopting high-frequency welding |
| CN114406681A (en) * | 2022-01-20 | 2022-04-29 | 青岛力晨新材料科技有限公司 | Method for rolling metal composite plate by friction welding assembly |
Citations (12)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN114193107A (en) * | 2022-01-20 | 2022-03-18 | 青岛力晨新材料科技有限公司 | Method for manufacturing metal composite material by adopting high-frequency welding |
| CN114406681A (en) * | 2022-01-20 | 2022-04-29 | 青岛力晨新材料科技有限公司 | Method for rolling metal composite plate by friction welding assembly |
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