CN110548765A - Interlayer micro-nano particle spraying auxiliary metal ultra-thin strip rolling compounding process - Google Patents
Interlayer micro-nano particle spraying auxiliary metal ultra-thin strip rolling compounding process Download PDFInfo
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- CN110548765A CN110548765A CN201910729305.9A CN201910729305A CN110548765A CN 110548765 A CN110548765 A CN 110548765A CN 201910729305 A CN201910729305 A CN 201910729305A CN 110548765 A CN110548765 A CN 110548765A
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- ultrathin
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B1/00—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations
- B21B1/38—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations for rolling sheets of limited length, e.g. folded sheets, superimposed sheets, pack rolling
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B47/00—Auxiliary arrangements, devices or methods in connection with rolling of multi-layer sheets of metal
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21C—MANUFACTURE OF METAL SHEETS, WIRE, RODS, TUBES OR PROFILES, OTHERWISE THAN BY ROLLING; AUXILIARY OPERATIONS USED IN CONNECTION WITH METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL
- B21C37/00—Manufacture of metal sheets, bars, wire, tubes or like semi-manufactured products, not otherwise provided for; Manufacture of tubes of special shape
- B21C37/02—Manufacture of metal sheets, bars, wire, tubes or like semi-manufactured products, not otherwise provided for; Manufacture of tubes of special shape of sheets
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B1/00—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations
- B21B1/38—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations for rolling sheets of limited length, e.g. folded sheets, superimposed sheets, pack rolling
- B21B2001/386—Plates
Abstract
The invention belongs to the field of metal material processing, and particularly relates to a rolling compounding process of an ultrathin metal strip assisted by interlayer micro-nano particle spraying. The method comprises the following steps: cleaning the surfaces of the metal ultra-thin strip base material and the composite material by using a grinding machine until a metal matrix is seen; spraying micro-nano particles on the polishing surface of the metal ultra-thin strip substrate, and buckling the substrate and the polishing surface of the composite material to form a blank to obtain a composite ultra-thin strip blank; feeding the composite ultrathin strip blank into a rolling mill for rolling to tightly combine the base metal and the composite metal; heating and insulating the composite ultrathin belt by using a tubular vacuum furnace or a method for packaging a quartz tube in vacuum, and then cooling; and (4) cutting edges of the obtained composite ultra-thin strip, straightening and coiling. The interlayer spraying micro-nano metal particles assists the rolling compounding process of the ultrathin strip, and has the advantages of simple process, low energy consumption, high compounding quality and high yield.
Description
Technical Field
The invention belongs to the field of metal material processing, and particularly relates to a rolling compounding process of an ultrathin metal strip assisted by interlayer micro-nano particle spraying.
Background
With the development of science and technology, extremely thin metal strips are widely applied to industries such as electronics, computers, medical treatment, aerospace and the like and are mainly used as structural members. With the development of miniaturization manufacturing technology, the requirements of products on the service performance and the cost are difficult to meet by adopting an extremely thin belt made of a single metal material. Therefore, a production process of the composite metal ultra-thin strip is urgently needed.
According to the different metal states of the composite material during molding, the processing methods of the prior layered metal composite plate can be divided into a liquid-liquid phase composite method, a liquid-solid phase composite method and a solid-solid phase composite method, and different composite technologies have advantages and disadvantages.
The liquid-liquid phase composite method is mainly electromagnetic continuous casting composite, is a novel composite forming process, is mainly used for producing stainless steel-carbon steel composite plates, is still in a research stage, and the structure and the performance of the composite plates are poor compared with those of a rolling composite method.
The solid-liquid phase compounding method mainly comprises casting/casting-rolling compounding, a jet deposition method, a reverse solidification method and the like. The casting/casting-rolling process has high composite temperature, easy oxidation of the surface of the composite substrate, great difference between the melting points of the composite metal and the base metal, easy damage to the bonding part, poor interface bonding effect, immature current technological process and further improvement. The spray deposition method and the reverse solidification method are both to compound a solidification layer on the substrate, the thickness of the compound layer is limited, and the method is suitable for improving the performances of corrosion resistance, wear resistance, high temperature resistance and the like of the surface of the substrate.
The solid-solid phase composite method has a plurality of types and more mature researches, and mainly comprises explosive cladding, rolling cladding, diffusion welding and the like. The explosion cladding is characterized in that high-strength chemical energy generated by explosive explosion is used for driving the clad plate to collide the substrate at high speed, so that an oxide layer on the surface of metal is damaged, the plastic deformation, melting and diffusion of the clad plate are promoted, metal welding is realized, the composite plate is suitable for metal welding with great melting point difference, great thermal expansion difference and great hardness difference, the generation of intermetallic compounds is avoided, the bonding strength is high, but the yield, the productivity and the yield are low, the product quality stability is poor, and huge potential safety hazards, noise pollution and environmental hazards are caused. The diffusion welding is to stack the component metals with clean surfaces together, and the metals are combined through the mutual diffusion between interface atoms after heating and pressurizing, does not need macroscopic deformation, and can be divided into diffusion welding without additives and auxiliary agents.
The basic principle of rolling compounding is that under the action of rolling force, two or more metal plates are subjected to plastic deformation simultaneously, a surface metal layer is cracked, fresh metal is exposed, metallurgical bonding is formed between the plate surfaces, and the bonding strength is further improved through the subsequent heat treatment process; the production cost is low, the process is simple, and the large-scale industrial production is easy to realize.
The problems existing at present are as follows:
1. The traditional rolling compounding method can be divided into hot rolling compounding and cold rolling compounding, wherein the hot rolling compounding is to heat a metal blank to a certain temperature before rolling and then roll the metal blank, but the direct rolling production in a high-temperature environment can cause the problems of oxide inclusion at a bonding interface and low bonding rate, the length of a composite metal plate is limited, the thickness is difficult to control, the production stability is poor, and the method is suitable for producing thicker composite plates. The cold rolling compounding method adopts one-pass high reduction rate to realize metallurgical bonding among metal atoms, and the bonding strength is further improved through subsequent heat treatment. The traditional cold rolling compounding is greatly influenced by an oxide layer and a hardened layer on the surface of metal, the surface layer can be broken only by a large reduction ratio (generally over 35 percent), fresh metal is exposed, and the compounding of dissimilar metals is realized, but the internal stress of the rolled composite board is not uniformly distributed under the large reduction ratio due to different mechanical properties and different deformability of the dissimilar metals, so that the produced composite board has large residual stress and the plate shape problems of buckling, local buckling and the like.
2. The extremely thin metal strip has a scale effect, the thinner the thickness is, the larger the deformation is, the more prominent the strip shape problem is, the traditional high reduction cold rolling compounding easily causes the strip shape problems of serious buckling, rolling leakage and the like, especially the extremely thin strip has large specific surface area, the fresh metal extrusion amount is small, the contact arc of a rolling compound deformation area is short, the combination time is short, the more critical deformation and surface activation energy are needed for reaching the compounding, and the severe challenge is brought to the rolling compounding of the extremely thin metal strip.
In summary, the contradiction between the strip shape problem caused by large specific surface area and extremely thin thickness and the composite process of cold rolling large deformation is a difficult point for restricting the rolling and the composite of the extremely thin strips, and the composite of the extremely thin strip materials of different metals can not be realized by the existing rolling process. Therefore, the interface of dissimilar metal is firmly combined, the plate shape is good, the production efficiency is high, and the problems which need to be solved in the compounding and production of the metal ultrathin strip are solved.
Disclosure of Invention
The invention aims to solve the problems of difficult combination, poor plate shape and the like of a composite material of ultrathin strips of dissimilar metals, and provides an auxiliary ultrathin strip rolling composite process for interlaminar micro-nano metal particle spraying.
The invention is realized by the following technical scheme: an interlayer micro-nano particle spraying auxiliary metal ultrathin strip rolling composite process comprises the following steps:
(1) Surface treatment, namely cleaning the surfaces of a metal ultra-thin strip substrate and a composite material by using a grinding machine until a metal matrix is seen, wherein the substrate and the composite material are both metal ultra-thin strips, and the thickness of the metal ultra-thin strips is 0.05 ~ 0.2.2 mm;
(2) blank preparation: spraying micro-nano particles on the polishing surface of the metal ultra-thin strip substrate, and buckling the substrate and the polishing surface of the composite material to form a blank to obtain a composite ultra-thin strip blank;
(3) Rolling: feeding the composite ultrathin strip blank into a rolling mill for rolling to tightly combine the base metal and the composite metal;
(4) And (3) heat treatment: heating and insulating the composite ultrathin belt by using a tubular vacuum furnace or a method for packaging a quartz tube in vacuum, and then cooling;
(5) And (3) finishing: and (4) cutting edges of the obtained composite ultra-thin strip, straightening and coiling.
In the present invention, in the step (4), the cooling includes furnace cooling, air cooling or water cooling.
Wherein, the deformation resistance of the metal ultra-thin strip substrate is larger than that of the composite material. In the rolling process, the metal ultrathin strip substrate with deposited particles with large deformation resistance protrudes out of the composite surface, so that the composite surface of the metal ultrathin strip with small deformation resistance is subjected to coordinated deformation, the deformation speed of the metal ultrathin strip with small deformation resistance is limited, the deformation speeds of dissimilar metal ultrathin strips tend to be consistent, and embedding is performed on the composite surface, so that the difference of metal plastic deformation caused by different metal deformation resistances, namely the problem of local buckling and severe buckling of the composite strip is solved, and the cracking phenomenon of the metal ultrathin strip substrate and the composite material in the rolling process is avoided.
As a further improvement of the technical scheme of the invention, in the step (2), the micro-nano particles are micro-nano metal particles and brazing filler metal particles.
as a further improvement of the technical scheme of the invention, in the step (2), the diameter of the micro-nano particles is 15 ~ 61 μm, preferably, the diameter of the micro-nano particles is 40 ~ 45 μm.
as a further improvement of the technical scheme of the invention, in the step (2), the spraying process adopts a cold spraying process, a thermal spraying process or an electrostatic spraying process.
as a further improvement of the technical scheme of the invention, in the step (2), the spraying process is single-pass spraying, the powder feeding rate is 0.6 ~ 0.11.11L/min, the moving speed of the spray gun is 1200 ~ 1600mm/s, and the spraying distance (the distance from the spray nozzle to the plate strip) is 25 ~ 36 mm.
As a further improvement of the technical scheme of the invention, in the step (2), the blank making process comprises the following steps: and (3) conveying the buckled base material and the composite material to a press machine for pressing, packaging and welding the buckled composite ultrathin strip, drilling holes at the end parts of the buckled composite ultrathin strip, vacuumizing, and sealing the holes to obtain a composite ultrathin strip blank.
as a further improvement of the technical solution of the present invention, in the step (3), the rolling process is: and (4) penetrating the composite ultrathin strip blank into a rolling mill to perform strip tension rolling.
As a further improvement of the technical solution of the present invention, in the step (3), the rolling mill is a corrugating rolling mill train, an asynchronous rolling mill, or a multi-rolling mill with six or more rolls.
The invention combines the spraying of the micro-nano particles with the traditional rolling process, the micro-nano particles are sprayed on the surface to be combined of the base material, the sprayed micro-nano particles can generate plastic deformation on the surface of the base material and deposit on the surface,
The spraying process is characterized in that single-layer micro-nano particles are required to be sprayed on a surface to be compounded of a metal ultrathin strip substrate with large deformation resistance, the spraying process is single-pass spraying, the powder feeding rate is 0.06 ~.11L/min, the moving speed of a spray gun is 1200 ~ mm/s, and the spraying distance is 25 ~ mm;
The friction force of the convex curved surface of the metal ultra-thin strip base material is utilized to increase the binding force between the composite ultra-thin strip base material and the composite material, the composite effect is good, and the composite strength is improved;
the auxiliary ultrathin strip rolling compounding process for interlayer spraying of the micro-nano metal particles is simple in process, low in energy consumption, high in compounding quality and high in yield.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.
FIG. 1 is a schematic diagram of a rolling and compounding process of an ultrathin strip assisted by micro-nano particle spraying.
FIG. 2 is a cross section of a composite ultrathin strip blank coated with metal micro-nano particles on the surface of a substrate 2.
in the figure: 1-metal micro-nano particles; 2-a substrate; 3-doubling the plate; 4-upper working roll; 5-lower working roll.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the technical solutions of the present invention will be described in detail below. It is to be understood that the described embodiments are merely exemplary of the invention, and not restrictive of the full scope of the invention. All other embodiments, which can be derived by a person skilled in the art from the examples given herein without any inventive step, are within the scope of the present invention.
the technical solution of the present invention will be described in detail below with reference to the accompanying drawings.
Example 1
Selecting a TU2 copper ultrathin strip and a SUS304 stainless steel ultrathin strip, wherein the stainless steel ultrathin strip is 0.05mm thick, 40mm wide and 100mm long, and is used as a substrate 2; the copper pole thin strip is 0.2mm thick, 40mm wide and 100mm long and is used as a composite plate 3;
(1) Surface treatment: cleaning the surfaces of an SUS304 stainless steel ultra-thin strip and a TU2 copper ultra-thin strip by using a grinding machine until a metal matrix is seen;
(2) Blank preparation: adopting a cold spraying process on the surface to be compounded of the SUS304 stainless steel ultra-thin strip, wherein the powder feeding rate is 0.6L/min, the moving speed of a spray gun is 1500mm/s, the spraying distance is 26mm, copper micro-nano particles are sprayed, the particle diameter is 38 mu m, the SUS304 stainless steel ultra-thin strip and the grinding surface of the TU2 copper ultra-thin strip are buckled and overlapped, then the SUS304 stainless steel ultra-thin strip is sent to a press machine to be pressed tightly, the periphery of the overlapped composite ultra-thin strip is packaged and welded, then, the end part of the overlapped composite ultra-thin strip is drilled and vacuumized, and then the hole is sealed to obtain a composite ultra-thin;
(3) Rolling: feeding the composite ultrathin strip blank into a 6-roll mill for strip tension rolling to enable the base metal and the composite metal to be tightly combined to obtain a composite ultrathin strip with the thickness of 0.1 mm;
(4) and (3) heat treatment: heating and insulating the composite ultra-thin strip for 2 hours by using a vacuum packaging quartz tube, wherein the heat treatment temperature is 1100 ℃, and then cooling by water to obtain a TU2 copper-SUS 304 stainless steel composite ultra-thin strip;
(5) And (3) finishing: the obtained TU2 copper-SUS 304 stainless steel composite ultra-thin strip is subjected to edge cutting, straightening and coiling.
The embodiment solves the difference of metal plastic deformation caused by different metal deformation resistance, namely the problem of plate shape of the composite plate strip, such as local buckling and severe buckling, avoids the cracking phenomenon of the metal ultra-thin strip substrate and the composite material in the rolling process, the metal ultra-thin strip with large deformation resistance and the metal ultra-thin strip with small deformation resistance have different yield strengths and different elongation rates, and the projected curved surface of the sprayed particles makes up the difference, so that the rolled substrate is identical with the composite material in length, and the substrate is not buckled, buckled and the internal stress is eliminated; the friction force of the convex curved surface of the metal ultrathin strip base material is utilized to increase the binding force between the composite ultrathin strip base material and the composite material, and the problem that the dissimilar metal ultrathin strip material is difficult to composite due to large ultrathin strip specific surface area, obvious scale effect and large composite surface activation energy is solved; the composite effect is good, and the bonding strength of the metal layer interface is improved.
The above description is only for the specific embodiments of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art can easily conceive of the changes or substitutions within the technical scope of the present invention, and all the changes or substitutions should be covered within the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the appended claims.
Claims (9)
1. An interlayer micro-nano particle spraying auxiliary metal ultrathin strip rolling composite process is characterized by comprising the following steps:
(1) surface treatment, namely cleaning the surfaces of a metal ultra-thin strip substrate and a composite material by using a grinding machine until a metal matrix is seen, wherein the substrate and the composite material are both metal ultra-thin strips, and the thickness of the metal ultra-thin strips is 0.05 ~ 0.2.2 mm;
(2) Blank preparation: spraying micro-nano particles on the polishing surface of the metal ultra-thin strip substrate, and buckling the substrate and the polishing surface of the composite material to form a blank to obtain a composite ultra-thin strip blank;
(3) rolling: feeding the composite ultrathin strip blank into a rolling mill for rolling to tightly combine the base metal and the composite metal;
(4) and (3) heat treatment: heating and insulating the composite ultrathin belt by using a tubular vacuum furnace or a method for packaging a quartz tube in vacuum, and then cooling;
(5) And (3) finishing: and (4) cutting edges of the obtained composite ultra-thin strip, straightening and coiling.
2. The process of rolling and compounding ultrathin metal strips with the assistance of micro-nano particles sprayed among layers according to claim 1, wherein the deformation resistance of a ultrathin metal strip substrate is greater than that of a composite material.
3. The rolling and compounding process of the ultrathin strip of metals assisted by interlaminar micro-nano particle spraying according to claim 1, characterized in that in step (2), the micro-nano particles are micro-nano metal particles and brazing filler metal particles.
4. The rolling and compounding process of the ultrathin strip of the metal assisted by interlaminar micro-nano particle spraying according to claim 1, characterized in that in the step (2), the diameter of the micro-nano particles is 15 ~ 61 μm.
5. The process for rolling and compounding ultrathin metal strips for interlaminar micro-nano particle spraying assistance according to claim 1, wherein in the step (2), the spraying process adopts a cold spraying process, a thermal spraying process or an electrostatic spraying process.
6. The process of rolling and compounding ultrathin metal strips with assistance of micro-nano particles through interlayer spraying according to claim 1, wherein in the step (2), the spraying process is single-pass spraying, the powder feeding rate is 0.6 ~ 0.11.11L/min, the moving speed of a spray gun is 1200 ~ 1600mm/s, and the spraying distance is 25 ~ 36 mm.
7. The rolling and compounding process of the ultrathin metal strip with the assistance of the micro-nano particles sprayed between the layers according to the claim 1, wherein in the step (2), the blank making process comprises the following steps: and (3) conveying the buckled base material and the composite material to a press machine for pressing, packaging and welding the buckled composite ultrathin strip, drilling holes at the end parts of the buckled composite ultrathin strip, vacuumizing, and sealing the holes to obtain a composite ultrathin strip blank.
8. the rolling and compounding process of the ultrathin metal strip with the assistance of the micro-nano particles sprayed between the layers according to the claim 1, wherein in the step (3), the rolling process comprises the following steps: and (4) penetrating the composite ultrathin strip blank into a rolling mill to perform strip tension rolling.
9. the process for rolling and compounding the ultrathin metal strip with the assistance of the micro-nano particles sprayed among the layers according to the claim 8, wherein in the step (3), the rolling mill is a corrugated rolling mill set, an asynchronous rolling mill or a multi-roll rolling mill with more than six rolls.
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Cited By (5)
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| CN113210431A (en) * | 2021-04-28 | 2021-08-06 | 太原理工大学 | Method for improving surface quality of corrugated roller cold-rolled metal sheet based on nano lubrication |
| CN113695393A (en) * | 2021-08-24 | 2021-11-26 | 太原理工大学 | Method for preparing metal composite thin strip by adopting pack rolling technology |
| CN113798394A (en) * | 2021-09-10 | 2021-12-17 | 大连理工大学 | Integrated manufacturing method of high-temperature-resistant thin-wall special-shaped component by laying laminated metal foil strips for blank making |
| CN114147085A (en) * | 2021-11-30 | 2022-03-08 | 重庆川仪自动化股份有限公司 | Preparation method of ultrathin composite strip |
| CN116871322A (en) * | 2023-09-08 | 2023-10-13 | 太原理工大学 | Preparation method of particle reinforced layered metal composite plate based on multipass rolling forming |
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| CN116871322B (en) * | 2023-09-08 | 2024-02-27 | 太原理工大学 | Preparation method of particle reinforced layered metal composite plate based on multipass rolling forming |
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Application publication date: 20191210 |
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