CN108817083B - Preparation method for realizing strong metallurgical bonding of dissimilar metal interface - Google Patents
Preparation method for realizing strong metallurgical bonding of dissimilar metal interface Download PDFInfo
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- 229910052751 metal Inorganic materials 0.000 title claims abstract description 48
- 239000002184 metal Substances 0.000 title claims abstract description 48
- 238000002360 preparation method Methods 0.000 title claims abstract description 16
- 239000002131 composite material Substances 0.000 claims abstract description 48
- 238000005096 rolling process Methods 0.000 claims abstract description 43
- 238000000034 method Methods 0.000 claims abstract description 36
- 239000002905 metal composite material Substances 0.000 claims abstract description 26
- 238000010438 heat treatment Methods 0.000 claims abstract description 23
- 238000005498 polishing Methods 0.000 claims abstract description 15
- 238000011282 treatment Methods 0.000 claims abstract description 10
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims description 19
- 229910052782 aluminium Inorganic materials 0.000 claims description 18
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims description 16
- 229910052802 copper Inorganic materials 0.000 claims description 16
- 239000010949 copper Substances 0.000 claims description 16
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims description 4
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 claims description 4
- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical compound [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 claims description 3
- 238000001953 recrystallisation Methods 0.000 claims description 3
- 229910052719 titanium Inorganic materials 0.000 claims description 3
- 239000010936 titanium Substances 0.000 claims description 3
- FYYHWMGAXLPEAU-UHFFFAOYSA-N Magnesium Chemical compound [Mg] FYYHWMGAXLPEAU-UHFFFAOYSA-N 0.000 claims description 2
- BQCADISMDOOEFD-UHFFFAOYSA-N Silver Chemical compound [Ag] BQCADISMDOOEFD-UHFFFAOYSA-N 0.000 claims description 2
- ATJFFYVFTNAWJD-UHFFFAOYSA-N Tin Chemical compound [Sn] ATJFFYVFTNAWJD-UHFFFAOYSA-N 0.000 claims description 2
- HCHKCACWOHOZIP-UHFFFAOYSA-N Zinc Chemical compound [Zn] HCHKCACWOHOZIP-UHFFFAOYSA-N 0.000 claims description 2
- QCWXUUIWCKQGHC-UHFFFAOYSA-N Zirconium Chemical compound [Zr] QCWXUUIWCKQGHC-UHFFFAOYSA-N 0.000 claims description 2
- 229910045601 alloy Inorganic materials 0.000 claims description 2
- 239000000956 alloy Substances 0.000 claims description 2
- PCHJSUWPFVWCPO-UHFFFAOYSA-N gold Chemical compound [Au] PCHJSUWPFVWCPO-UHFFFAOYSA-N 0.000 claims description 2
- 229910052737 gold Inorganic materials 0.000 claims description 2
- 239000010931 gold Substances 0.000 claims description 2
- 229910052742 iron Inorganic materials 0.000 claims description 2
- 229910052749 magnesium Inorganic materials 0.000 claims description 2
- 239000011777 magnesium Substances 0.000 claims description 2
- 229910052759 nickel Inorganic materials 0.000 claims description 2
- 229910052709 silver Inorganic materials 0.000 claims description 2
- 239000004332 silver Substances 0.000 claims description 2
- 239000011135 tin Substances 0.000 claims description 2
- 229910052718 tin Inorganic materials 0.000 claims description 2
- 229910052725 zinc Inorganic materials 0.000 claims description 2
- 239000011701 zinc Substances 0.000 claims description 2
- 229910052726 zirconium Inorganic materials 0.000 claims description 2
- 238000005097 cold rolling Methods 0.000 abstract description 15
- 238000005098 hot rolling Methods 0.000 abstract description 15
- 238000005265 energy consumption Methods 0.000 abstract description 4
- 230000007547 defect Effects 0.000 abstract description 3
- 238000003475 lamination Methods 0.000 abstract description 2
- 150000002739 metals Chemical class 0.000 description 14
- 238000013329 compounding Methods 0.000 description 13
- 229910000975 Carbon steel Inorganic materials 0.000 description 8
- 239000010962 carbon steel Substances 0.000 description 8
- 238000009792 diffusion process Methods 0.000 description 5
- 229910001094 6061 aluminium alloy Inorganic materials 0.000 description 4
- 238000011161 development Methods 0.000 description 3
- 229910000765 intermetallic Inorganic materials 0.000 description 3
- 238000010030 laminating Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 2
- 238000003466 welding Methods 0.000 description 2
- 229910000838 Al alloy Inorganic materials 0.000 description 1
- 229910000831 Steel Inorganic materials 0.000 description 1
- 230000006978 adaptation Effects 0.000 description 1
- 238000005253 cladding Methods 0.000 description 1
- 238000003754 machining Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000009740 moulding (composite fabrication) Methods 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
Classifications
-
- 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
- B21B3/00—Rolling materials of special alloys so far as the composition of the alloy requires or permits special rolling methods or sequences ; Rolling of aluminium, copper, zinc or other non-ferrous metals
-
- 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
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Pressure Welding/Diffusion-Bonding (AREA)
Abstract
A preparation method for realizing strong metallurgical bonding of dissimilar metal interfaces belongs to the technical field of preparation of dissimilar metal composite materials. The method is characterized in that the respective advantages of the existing hot rolling composite method and cold rolling composite method are fully exerted, the defects are overcome, the working procedures of polishing treatment, lamination, room temperature rolling, short-time heating, high temperature rolling and the like are combined, and the high-performance dissimilar metal composite material with the interface realizing strong metallurgical bonding is obtained by coordinately controlling the time, the temperature and the like of each working procedure in the preparation process of the dissimilar metal composite material. The method has the advantages of simple process, low energy consumption, short period, less equipment investment, low cost and high efficiency, can realize strong metallurgical bonding of dissimilar metal interfaces only by utilizing the existing polishing equipment, a heating furnace, rolling mills (one rolling mill or two rolling mills randomly arranged) and the like, improves the interface bonding strength of the dissimilar metal composite materials prepared by the existing hot rolling composite method and cold rolling composite method by more than 20-50 percent, and has wider application range of the obtained high-performance dissimilar metal composite materials.
Description
Technical Field
The invention belongs to the technical field of preparation of dissimilar metal composite materials, and particularly relates to a preparation method for realizing strong metallurgical bonding of a dissimilar metal interface.
Background
By combining dissimilar metals, the advantages of each group of metals are fully exerted, excellent comprehensive properties which are not possessed by single metal are obtained, and the high-performance dissimilar metal composite material is developed, and is one of research hotspots and important development trends in the field of new material frontiers.
At present, the bonding mode of the dissimilar metal interface mainly comprises two main types of metallurgical bonding and mechanical bonding. The metallurgical bonding is bonding formed by atomic interdiffusion between interfaces of dissimilar metals, and the mechanical bonding is bonding formed by intermeshing of uneven surfaces between interfaces of dissimilar metals. After the dissimilar metal interface forms metallurgical bonding, the composite material has excellent comprehensive performance and good technological performance, can be subjected to various cold and hot pressure processing forming, welding, machining and the like, and has performance greatly superior to that of dissimilar metal with the interface being mechanically bonded.
The firmer the metallurgical bonding of the dissimilar metal interface is, the more excellent the performance thereof is, and the wider the application range of the related dissimilar metal composite material is. Rolling is the most common method for preparing dissimilar metal composite materials in large scale at present, and mainly comprises a hot rolling compounding method and a cold rolling compounding method.
The hot rolling composite method is a method of rolling composite forming of dissimilar metals at high temperature. When hot rolling and compounding are carried out, under the action of high temperature and high pressure, atoms at the interface of dissimilar metals can be diffused quickly, and metallurgical bonding between the interfaces of the dissimilar metals is effectively realized. However, because the thickness of the combined slab used in the general hot rolling compounding is large, the heating temperature before the hot rolling compounding is high (generally more than 1.4 times the recrystallization temperature of the metal blank), the heating time is long (generally 5 to 20 hours, even longer), the energy consumption is large, the period is long, and when the hot rolling compounding forming is carried out on metals with high activity such as aluminum, titanium and the like, a brittle intermetallic compound is easily and rapidly generated at a dissimilar metal interface, so that the metallurgical bonding quality of the dissimilar metal interface is poor, the interface bonding strength is weak, the types of dissimilar metal composite materials prepared by the hot rolling compounding method are few, and the application field is limited.
The cold rolling composite method generally refers to a method of performing rolling composite forming on dissimilar metals at room temperature. When cold rolling and compounding are carried out, rolling and compounding forming of dissimilar metals can be carried out only by polishing and other treatments on the surface to be compounded of the metal blank, and metal blank pretreatment process measures such as vacuum welding and the like are not needed, so that the freedom degree of metal combination is large, and the application range is wide. However, in the cold rolling and cladding, the interface of the dissimilar metals hardly has a diffusion effect, and it is difficult to achieve complete metallurgical bonding. Therefore, after cold rolling and compounding, a high-temperature diffusion heat treatment is often applied for a long time (generally about 10 hours or even longer) so that atomic diffusion occurs at the interface of dissimilar metals to realize metallurgical bonding of the interface; the long-time diffusion heat treatment process has the defects of high energy consumption and long period, and is easy to generate brittle intermetallic compounds on the dissimilar metal interface, so that the metallurgical bonding degree of the dissimilar metal interface is weak, the interface bonding strength is not high, and the development and the application of preparing the dissimilar metal composite material by a cold rolling composite method are seriously influenced.
Therefore, it is of great importance to develop a preparation method that can realize very firm metallurgical bonding (called as "strong metallurgical bonding") between the interfaces of dissimilar metals, and accelerate the development and application and popularization of high-performance dissimilar metal composite materials.
Disclosure of Invention
The invention gives full play to the respective advantages of the existing hot rolling composite method and cold rolling composite method of dissimilar metal composite materials, overcomes the defects, organically combines the two methods, realizes the strong metallurgical bonding of dissimilar metal interfaces by coordinately controlling the time, temperature and the like of each procedure in the preparation process of the dissimilar metal composite materials, develops a preparation method for realizing the strong metallurgical bonding of the dissimilar metal interfaces, solves the problems that the interface bonding quality of the dissimilar metal composite materials prepared by the existing hot rolling composite method or cold rolling composite method is difficult to meet higher use requirements and the like, and obtains the high-performance dissimilar metal composite materials of which the dissimilar metal interfaces realize the strong metallurgical bonding.
A preparation method for realizing strong metallurgical bonding of dissimilar metal interfaces is characterized by comprising the following specific steps:
1. performing room-temperature mechanical polishing treatment on the surface to be compounded of the metal plate blank with a clean surface in parallel to the length direction of the metal plate blank within 0.1-10 minutes;
2. then, stacking 2-10 layers of metal plate blanks within 1-15 minutes to form a combined plate blank;
3. then sending the combined plate blank to a rolling mill with tension at an inlet and an outlet for rolling at room temperature within 1-15 minutes to obtain a composite plate blank with an interface realizing mechanical combination;
4. then heating the composite plate blank for 10-40 minutes in a heating furnace at 1.05-1.2 times of recrystallization temperature;
5. and finally, conveying the heated composite plate blank to a rolling mill with an outlet with tension for high-temperature rolling within 0.01-5 minutes to obtain the dissimilar metal composite plate with the interface realizing strong metallurgical bonding.
The metal can be copper, aluminum, magnesium, iron, titanium, nickel, zinc, tin, gold, silver, zirconium and alloys thereof, and can also be steel and metal composites.
Compared with the existing preparation method of the dissimilar metal composite material, the preparation method of the dissimilar metal composite material has the advantages that the grinding treatment, the lamination, the room-temperature rolling, the short-time heating, the high-temperature rolling and other processes are combined, the preparation method of the dissimilar metal composite material is simple in process, low in energy consumption, short in period, low in equipment investment, low in cost and high in efficiency, and the composite forming can be completed only by using the existing grinding equipment, a heating furnace, a rolling mill (one rolling mill or two rolling mills which are randomly arranged) and the like. When the thickness of a combined plate blank formed by the dissimilar metals is large at the beginning, cold rolling is adopted for composite forming, so that the problem that the traditional hot rolling composite method can be used for carrying out the rolling forming only after long-time high-temperature heating is avoided; in the heating process before the subsequent hot rolling and compounding, because the composite plate blank formed by the previous cold rolling and compounding is thinned, the required heating temperature is lower, the heating time is shortened, and the problem that a brittle intermetallic compound is generated between dissimilar metal interfaces due to long-time diffusion heat treatment in the traditional cold rolling and compounding method is solved. The time, the temperature and the like of each procedure in the whole preparation process of the dissimilar metal composite material are coordinated and controlled, so that the strong metallurgical bonding of dissimilar metal interfaces is realized, the interface bonding strength of the dissimilar metal composite material prepared by the hot rolling composite method and the cold rolling composite method is improved by more than 20-50 percent compared with that of the dissimilar metal composite material prepared by the existing hot rolling composite method and cold rolling composite method, and the high-performance dissimilar metal composite material with wider application range is obtained.
Detailed Description
The present invention is described in detail below with reference to the following examples, which are necessary to point out here only for further illustration of the present invention and should not be construed as limiting the scope of the present invention, and those skilled in the art can make some insubstantial modifications and adaptations to the present invention based on the above-mentioned disclosure.
Example 1:
performing room-temperature mechanical polishing treatment on the surfaces to be compounded of the pure aluminum plate blanks and the pure copper plate blanks with clean surfaces in parallel to the length direction of the pure aluminum plate blanks and the pure copper plate blanks, wherein the polishing time is 1 minute; then, stacking the 3-layer pure copper plate blank, the pure aluminum plate blank and the pure copper plate blank within 5 minutes to form a combined plate blank; then sending the combined plate blank to a rolling mill with tension at an inlet and an outlet for rolling at room temperature within 5 minutes to obtain a composite plate blank with an interface realizing mechanical combination; then heating the composite plate blank in a heating furnace at 520 ℃ for 10 minutes in a short time; and finally, conveying the heated composite plate blank to a rolling mill with tension at an outlet for high-temperature rolling within 1 minute to obtain a pure copper/pure aluminum/pure copper composite plate with a strong metallurgical bonding interface.
Example 2:
performing room-temperature mechanical polishing treatment on the surfaces to be compounded of the 1060 pure aluminum plate blank and the 6061 aluminum alloy plate blank with clean surfaces in parallel to the length direction of the 1060 pure aluminum plate blank and the 6061 aluminum alloy plate blank, wherein the polishing time is 10 minutes; then laminating 2 layers of 1060 pure aluminum slabs and 6061 aluminum alloy slabs within 15 minutes to form a combined slab; then sending the combined plate blank to a rolling mill with tension at an inlet and an outlet for rolling at room temperature within 15 minutes to obtain a composite plate blank with an interface realizing mechanical combination; then, the composite plate blank is heated for 40 minutes in a heating furnace at 550 ℃; and finally, conveying the heated composite plate blank to a rolling mill with tension at an outlet for high-temperature rolling within 5 minutes to obtain the 1060 pure aluminum/6061 aluminum alloy composite plate with the interface realizing strong metallurgical bonding.
Example 3:
performing room-temperature mechanical polishing treatment on the surfaces to be compounded of the Q235B carbon steel plate blank and the pure aluminum plate blank with clean surfaces in a direction parallel to the length direction of the Q235B carbon steel plate blank and the pure aluminum plate blank, wherein the polishing time is 2 minutes; then laminating the 2-layer Q235B carbon steel plate blank and the pure aluminum plate blank within 3 minutes to form a combined plate blank; then sending the combined plate blank to a rolling mill with tension at an inlet and an outlet for rolling at room temperature within 5 minutes to obtain a composite plate blank with an interface realizing mechanical combination; then, the composite plate blank is heated for 40 minutes in a heating furnace at 480 ℃; and finally, conveying the heated composite plate blank to a rolling mill with tension at an outlet for high-temperature rolling within 2 minutes to obtain the Q235B carbon steel/pure aluminum composite plate with the interface realizing strong metallurgical bonding.
Example 4:
performing room-temperature mechanical polishing treatment on the surfaces to be compounded of the pure aluminum plate blanks and the pure copper plate blanks with clean surfaces in parallel to the length direction of the pure aluminum plate blanks and the pure copper plate blanks, wherein the polishing time is 3 minutes; then, 2 layers of pure aluminum slabs and pure copper slabs are laminated within 6 minutes to form a combined slab; then sending the combined plate blank to a rolling mill with tension at an inlet and an outlet for rolling at room temperature within 10 minutes to obtain a composite plate blank with an interface realizing mechanical combination; then, the composite plate blank is heated for 30 minutes in a heating furnace at 520 ℃; and finally, conveying the heated composite plate blank to a rolling mill with tension at an outlet for high-temperature rolling within 0.5 minute to obtain the pure aluminum/pure copper composite plate with the interface realizing strong metallurgical bonding.
Example 5:
performing room-temperature mechanical polishing treatment on the surfaces to be compounded of the Q235B carbon steel plate blank and the pure copper plate blank with clean surfaces in parallel to the length direction of the Q235B carbon steel plate blank and the pure copper plate blank, wherein the polishing time is 2 minutes; then laminating the 2-layer Q235B carbon steel plate blank and the pure copper plate blank within 2 minutes to form a combined plate blank; then sending the combined plate blank to a rolling mill with tension at an inlet and an outlet for rolling at room temperature within 5 minutes to obtain a composite plate blank with an interface realizing mechanical combination; then, the composite plate blank is heated for 30 minutes in a heating furnace at 500 ℃; and finally, conveying the heated composite plate blank to a rolling mill with tension at an outlet for high-temperature rolling within 1 minute to obtain a Q235B carbon steel/pure copper composite plate with a strong metallurgical bonding interface.
Claims (2)
1. A preparation method for realizing strong metallurgical bonding of dissimilar metal interfaces is characterized in that room-temperature mechanical polishing treatment is carried out on the surface to be compounded of a metal plate blank with a clean surface in parallel to the length direction of the metal plate blank within 0.1-10 minutes; then, stacking 2-10 layers of metal plate blanks within 1-15 minutes to form a combined plate blank; then sending the combined plate blank to a rolling mill with tension at an inlet and an outlet for rolling at room temperature within 1-15 minutes to obtain a composite plate blank with an interface realizing mechanical combination; then heating the composite plate blank for 10-40 minutes in a heating furnace at 1.05-1.2 times of recrystallization temperature; and finally, conveying the heated composite plate blank to a rolling mill with an outlet with tension for high-temperature rolling within 0.01-5 minutes to obtain the dissimilar metal composite plate with the interface realizing strong metallurgical bonding.
2. A method of forming a strong metallurgical bond at a dissimilar metal interface as recited in claim 1 in which said metal is selected from the group consisting of copper, aluminum, magnesium, iron, titanium, nickel, zinc, tin, gold, silver, zirconium and alloys of any of the foregoing.
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| CN108817083B true CN108817083B (en) | 2020-03-03 |
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Families Citing this family (11)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN109849455B (en) * | 2019-02-22 | 2020-08-21 | 北京科技大学 | Magnesium/steel layered composite material and preparation method thereof |
| CN110042353B (en) * | 2019-04-04 | 2020-11-27 | 内蒙古科技大学 | Nano laminated aluminum-based composite material and preparation method thereof |
| CN110420999A (en) * | 2019-05-20 | 2019-11-08 | 重庆大学 | A kind of titanium/aluminium laminated composite plate preparation method of pre- cold rolling diffusion |
| CN110496859B (en) * | 2019-08-12 | 2020-11-17 | 北京科技大学 | Welding-free sheath hot rolling compounding method |
| CN110681694B (en) * | 2019-10-09 | 2021-04-13 | 北京科技大学 | Forming method of copper/aluminum composite material with high interface bonding strength |
| CN110665969B (en) * | 2019-10-09 | 2021-04-13 | 北京科技大学 | Preparation method of high-performance titanium/steel bimetal composite board |
| CN110665968B (en) * | 2019-10-09 | 2021-05-18 | 北京科技大学 | High-strength high-plasticity corrosion-resistant aluminum alloy layered composite material and preparation method thereof |
| CN110935727B (en) * | 2019-11-25 | 2022-04-15 | 上海工程技术大学 | Superplastic rolling method for laser heating dissimilar metal composite material |
| CN112108518B (en) * | 2020-08-03 | 2022-01-18 | 北京科技大学 | Preparation method of metal layered composite material with strong metallurgical bonding interface |
| CN112475584B (en) * | 2020-10-19 | 2022-07-01 | 伊莱特能源装备股份有限公司 | Plate blank surface treatment method for vacuum seal welding |
| CN113305171B (en) * | 2021-05-12 | 2022-11-04 | 北京科技大学 | Preparation method of titanium/aluminum laminated composite thin plate strip |
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| JP3745124B2 (en) * | 1998-08-17 | 2006-02-15 | 日本金属工業株式会社 | Method for producing a plate-like or coil-like metal material having a fine metal structure or non-metallic inclusions and little segregation of components |
| JP2001321964A (en) * | 2000-05-18 | 2001-11-20 | Nippon Metal Ind Co Ltd | METHOD OF MANUFACTURING NiTi-BASED DUMPING ALLOY BY LAMINATED ROLLING AND NiTi-BASED DUMPING ALLOY |
| CN103752611B (en) * | 2014-01-03 | 2015-10-07 | 北京科技大学 | A kind of short flow high efficiency preparing process of layered metal composite board band |
| CN105170652B (en) * | 2015-08-31 | 2017-03-01 | 东北大学 | A kind of preparation method of multi-layer heterogeneous metal composite strip in razor-thin |
| CN106319167A (en) * | 2016-08-29 | 2017-01-11 | 银邦金属复合材料股份有限公司 | Corrosion-resistant rolled aluminum steel composite material and preparing method thereof |
| CN107552564A (en) * | 2017-08-04 | 2018-01-09 | 无锡银荣板业有限公司 | The hot-rolled production process of copper-aluminum composite board |
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