CN112251616A - Process method for producing red copper pipe by refining, continuous casting, continuous rolling and stretching waste copper - Google Patents
Process method for producing red copper pipe by refining, continuous casting, continuous rolling and stretching waste copper Download PDFInfo
- Publication number
- CN112251616A CN112251616A CN202011144575.2A CN202011144575A CN112251616A CN 112251616 A CN112251616 A CN 112251616A CN 202011144575 A CN202011144575 A CN 202011144575A CN 112251616 A CN112251616 A CN 112251616A
- Authority
- CN
- China
- Prior art keywords
- copper
- rolling
- waste
- refining
- copper pipe
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Images
Classifications
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22B—PRODUCTION AND REFINING OF METALS; PRETREATMENT OF RAW MATERIALS
- C22B15/00—Obtaining copper
- C22B15/0026—Pyrometallurgy
- C22B15/0056—Scrap treating
-
- 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
- B21B1/46—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 metal immediately subsequent to continuous casting
- B21B1/466—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 metal immediately subsequent to continuous casting in a non-continuous process, i.e. the cast being cut before rolling
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
- B22D11/00—Continuous casting of metals, i.e. casting in indefinite lengths
- B22D11/001—Continuous casting of metals, i.e. casting in indefinite lengths of specific alloys
- B22D11/004—Copper alloys
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
- B22D11/00—Continuous casting of metals, i.e. casting in indefinite lengths
- B22D11/006—Continuous casting of metals, i.e. casting in indefinite lengths of tubes
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D9/00—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor
- C21D9/08—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor for tubular bodies or pipes
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22B—PRODUCTION AND REFINING OF METALS; PRETREATMENT OF RAW MATERIALS
- C22B15/00—Obtaining copper
- C22B15/0026—Pyrometallurgy
- C22B15/006—Pyrometallurgy working up of molten copper, e.g. refining
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22F—CHANGING THE PHYSICAL STRUCTURE OF NON-FERROUS METALS AND NON-FERROUS ALLOYS
- C22F1/00—Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working
- C22F1/08—Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working of copper or alloys based thereon
-
- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23G—CLEANING OR DE-GREASING OF METALLIC MATERIAL BY CHEMICAL METHODS OTHER THAN ELECTROLYSIS
- C23G1/00—Cleaning or pickling metallic material with solutions or molten salts
- C23G1/14—Cleaning or pickling metallic material with solutions or molten salts with alkaline solutions
- C23G1/20—Other heavy metals
-
- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23G—CLEANING OR DE-GREASING OF METALLIC MATERIAL BY CHEMICAL METHODS OTHER THAN ELECTROLYSIS
- C23G3/00—Apparatus for cleaning or pickling metallic material
- C23G3/04—Apparatus for cleaning or pickling metallic material for cleaning pipes
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P10/00—Technologies related to metal processing
- Y02P10/20—Recycling
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Materials Engineering (AREA)
- Chemical Kinetics & Catalysis (AREA)
- General Chemical & Material Sciences (AREA)
- Manufacturing & Machinery (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Crystallography & Structural Chemistry (AREA)
- Manufacture And Refinement Of Metals (AREA)
Abstract
The invention relates to a process method for producing a red copper pipe by refining, continuous casting, continuous rolling and stretching waste copper, which comprises the following steps: sorting the waste copper, classifying and placing the waste copper according to the weight ratio after sorting, carrying out alkali washing, selecting qualified waste copper A after sorting, carrying out alkali washing on the waste copper with the copper content of more than 90%, smelting, drying the waste copper after the alkali washing B is finished, heating to 1000-.
Description
Technical Field
The invention relates to a process method for producing a red copper tube by refining, continuous casting, continuous rolling and stretching waste copper, belonging to the technical field of red copper tube processing.
Background
The equipment process for producing the pure copper pipe by horizontal continuous casting and upward continuous casting-continuous rolling-stretching completely replaces the extrusion method to produce the copper pipe due to the scale benefits, efficiency and stable quality, is the most used production process in the world currently, but for the copper pipe industry, the production of the pure copper pipe by using the waste copper only returns to a bent path after the waste copper is electrolyzed, the production process of the electrolytic copper needs a large amount of electric energy and production area, and the social resources of the people are greatly consumed, so that the process method for producing the copper pipe by refining, continuous casting, continuous rolling and stretching the waste copper is provided.
Disclosure of Invention
The technical problem to be solved by the invention is to overcome the existing defects, and provide a process method for producing the red copper pipe by refining, continuously casting, continuously rolling and stretching the waste copper, which can effectively solve the problems in the background technology.
In order to solve the technical problems, the invention provides the following technical scheme:
a process method for producing a red copper tube by refining, continuous casting, continuous rolling and stretching waste copper comprises the following steps:
A. sorting the waste copper, namely sorting the waste copper according to a weight ratio and placing the waste copper in a classified manner;
B. alkali washing, namely selecting qualified waste copper A, and performing alkali washing on the waste copper with the copper content of more than 90%;
C. smelting, namely drying the waste copper after the completion of the alkali washing B, and heating to 1000-1250 ℃ to melt the waste copper;
D. reducing and refining, namely inversely inserting the dried bundled green wood into the copper liquid from a charging hole of a refining furnace to remove oxygen in the copper liquid;
E. stirring, wherein the temperature around the copper liquid in the step D is adjusted to 1100-1300 ℃ for stirring;
F. horizontally connecting and casting, namely introducing the cast blank into a continuous casting machine, continuously and uninterruptedly passing through twelve rollers, and rolling the blank into a copper pipe with the thickness of 7.0-10.0 mm;
D. c, four-side milling, namely, putting the copper pipe prepared in the step F into a milling machine for processing, and finely processing the copper pipe with the milling amount of 0.4-0.6mm on the outer surface;
H. d, rough rolling, namely putting the copper pipe finished in the step D into a four-roller reversible medium rough rolling machine to finish rough rolling;
I. intermediate softening annealing, namely performing softening pushing in a bell-type furnace, keeping the temperature in the bell-type furnace at 480-500 ℃, and continuously annealing for 4 hours to finish the working procedure of the intermediate softening annealing;
J. pre-rolling, namely putting the copper pipe annealed in the step I into a four-roller reversible middle finishing mill to finish the pre-rolling;
K. fine rolling, namely finishing the fine rolling on a twenty-high roll mill;
l, stretch bending and straightening, namely placing the material dug in the step K in a numerical control stretch bending and straightening unit for stretching, wherein the data of the elongation rate is controlled to be 0.2-0.4%.
As a further description of the above scheme, in the step D and the step E, the stirring speed is 700-.
As a further description of the above scheme, after step H is completed, the two ends of the copper tube are trimmed, and the two ends of the copper tube are longitudinally cut by using a trimming machine.
As a further description of the above scheme, after step I is completed, the copper tube is placed on a degreasing cleaning line for cleaning treatment, and the degreasing function is turned off.
As a further description of the above scheme, after step J is completed, the copper tube is pre-rolled and annealed, the copper tube is sent into the annealing furnace, and the temperature in the annealing furnace is controlled to be continuously completed within 600-700 ℃.
As a further description of the above scheme, after step K is completed, degreasing and cleaning the refined copper pipe, soaking the copper pipe in a degreasing solution composed of a component capable of removing oil stains and a component capable of forming a phosphating film on the surface of steel, pouring out the solvent after degreasing, and drying the inside and the outside of the pipe by using an exhaust fan.
As a further description of the above scheme, after the step L is completed, the copper pipe is cut by a cutting machine, cut, packed and warehoused.
The invention has the beneficial effects that:
1. after the copper pipe is finely rolled and dug, the pipe wall is degreased and cleaned by using a degreasing agent, so that the purity and quality of the produced copper pipe can be effectively ensured, and the condition that the conveyed and stored materials are mixed with grease or organic matters to cause explosion is avoided;
2. the step of reduction refining by using electrolytic copper is avoided, so that the working efficiency of producing the red copper pipe by using waste copper is effectively improved;
3. utilize the milling machine to process the copper pipe surface, what can make the copper pipe specification of making more accords with the acceptance service standard, has reduced the condition of not having reworking or abandoning because of the specification after the copper pipe is accomplished, the effectual condition of avoiding the secondary waste of raw materials.
Drawings
The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the principles of the invention and not to limit the invention.
FIG. 1 is a schematic flow chart of a process method for producing a red copper pipe by refining, continuous casting, continuous rolling and stretching waste copper.
Detailed Description
The preferred embodiments of the present invention will be described in conjunction with the accompanying drawings, and it will be understood that they are described herein for the purpose of illustration and explanation and not limitation.
Referring to fig. 1, the present invention provides a technical solution: a process method for producing a red copper tube by refining, continuous casting, continuous rolling and stretching waste copper comprises the following steps: sorting the waste copper, classifying and placing the waste copper according to the weight ratio, carrying out alkali washing, selecting qualified waste copper A after sorting, carrying out alkali washing on the waste copper with the copper content of more than 90%, smelting, drying the waste copper after the alkali washing B is finished, heating to 1000-1250 ℃ to melt the waste copper, carrying out reduction refining, inserting the dried bundled green wood into the copper liquid from a feed inlet of a refining furnace, removing oxygen in the copper liquid, stirring, adjusting the temperature around the copper liquid in the step D to 1100-1300 ℃ to stir, horizontally connecting and casting, introducing the cast blank into a continuous casting machine, continuously and uninterruptedly passing through twelve rollers to roll the blank into a copper pipe with the diameter of 7.0-10.0mm, carrying out four-sided milling, putting the copper pipe prepared in the step F into a milling machine to process, and finely processing the milling amount of 0.4-0.6mm on the outer surface, and D, rough rolling, namely putting the copper pipe finished in the step D on a four-roller reversible intermediate rough rolling mill to finish rough rolling, performing intermediate softening annealing, performing softening pushing in a bell-type furnace, keeping the temperature in the bell-type furnace at 480-plus-500 ℃, continuously annealing for 4 hours to finish the process of intermediate softening annealing, performing pre-rolling and fine rolling on the copper pipe annealed in the step I on a four-roller reversible intermediate fine rolling mill, finishing the fine rolling and stretch bending straightening on a twenty-roller mill, and putting the material dug in the step K on a numerical control stretch bending straightening unit to be stretched, wherein the data of the elongation rate is controlled to be 0.2-0.4%.
Specifically, in the step D and the step E, the stirring speed is 700-plus 850r/H, an oxygen-oxygen determinator is adopted to detect the oxygen concentration in the copper liquid, so that the oxygen concentration in the copper liquid reaches 100-plus 150ppm, after the step H is completed, the two ends of the copper pipe are trimmed, an edge trimmer is used to longitudinally cut the two ends of the copper pipe, after the step I is completed, the copper pipe is placed on a degreasing cleaning line to be cleaned, the degreasing function is closed, after the step J is completed, the copper pipe is pre-refined and annealed, the copper pipe is sent into an annealing furnace, the temperature in the annealing furnace is controlled to be continuously completed within 600-plus 700 ℃, after the step K is completed, the copper pipe after the refinement is cleaned, the copper pipe is soaked by a degreasing solution which consists of components capable of removing oil stains and components capable of generating a phosphating film on the surface of steel, and (3) after degreasing, pouring out the solvent, drying the inside and the outside of the pipe by using an exhaust fan, and cutting the copper pipe by using a cutting machine, cutting, packaging and warehousing after the step L is finished.
The above embodiments are preferred embodiments of the present invention, and those skilled in the art can make variations and modifications to the above embodiments, therefore, the present invention is not limited to the above embodiments, and any obvious improvements, substitutions or modifications made by those skilled in the art based on the present invention are within the protection scope of the present invention.
Claims (7)
1. A process method for producing a red copper tube by refining, continuous casting, continuous rolling and stretching waste copper is characterized by comprising the following steps:
A. sorting the waste copper, namely sorting the waste copper according to a weight ratio and placing the waste copper in a classified manner;
B. alkali washing, namely selecting qualified waste copper A, and performing alkali washing on the waste copper with the copper content of more than 90%;
C. smelting, namely drying the waste copper after the completion of the alkali washing B, and heating to 1000-1250 ℃ to melt the waste copper;
D. reducing and refining, namely inversely inserting the dried bundled green wood into the copper liquid from a charging hole of a refining furnace to remove oxygen in the copper liquid;
E. stirring, wherein the temperature around the copper liquid in the step D is adjusted to 1100-1300 ℃ for stirring;
F. horizontally connecting and casting, namely introducing the blank after casting into a continuous casting machine, continuously passing through twelve rollers, and rolling the blank into a copper pipe with the thickness of 7.0-10.0 mm;
D. c, four-side milling, namely, putting the copper pipe prepared in the step F into a milling machine for processing, and finely processing the copper pipe with the milling amount of 0.4-0.6mm on the outer surface;
H. d, rough rolling, namely putting the copper pipe finished in the step D into a four-roller reversible medium rough rolling mill to finish the rough rolling;
I. intermediate softening annealing, namely performing softening pushing in a bell-type furnace, keeping the temperature in the bell-type furnace at 480-500 ℃, and continuously annealing for 4 hours to finish the working procedure of the intermediate softening annealing;
J. pre-rolling, namely putting the copper pipe annealed in the step I into a four-roller reversible middle finishing mill to finish the pre-rolling;
K. fine rolling, namely finishing the fine rolling on a twenty-high roll mill;
l, stretch bending and straightening, namely placing the material dug in the step K in a numerical control stretch bending and straightening unit for stretching, wherein the data of the elongation rate is controlled to be 0.2-0.4%.
2. The process method for producing the copper tube by refining, continuous casting, continuous rolling and stretching the waste copper according to claim 1, which is characterized in that: in the step D and the step E, the stirring speed is 850r/h at 700-.
3. The process method for producing the copper tube by refining, continuous casting, continuous rolling and stretching the waste copper according to claim 1, which is characterized in that: and H, after the step H is finished, cutting edges of the two ends of the copper pipe, and longitudinally cutting the two ends of the copper pipe by using an edge cutter.
4. The process method for producing the copper tube by refining, continuous casting, continuous rolling and stretching the waste copper according to claim 1, which is characterized in that: and (4) after the step I is finished, putting the copper pipe on a degreasing cleaning line for cleaning treatment, and closing the degreasing function.
5. The process method for producing the copper tube by refining, continuous casting, continuous rolling and stretching the waste copper according to claim 1, which is characterized in that: and D, after the step J is finished, pre-rolling annealing is carried out on the copper pipe, the copper pipe is sent into an annealing furnace, and the temperature in the annealing furnace is controlled to be continuously finished within 600-700 ℃.
6. The process method for producing the copper tube by refining, continuous casting, continuous rolling and stretching the waste copper according to claim 1, which is characterized in that: and D, after the step K is finished, degreasing and cleaning the refined copper pipe, soaking the copper pipe in a degreasing solution, wherein the degreasing solution is composed of components capable of removing oil stains and components capable of enabling a steel surface to generate a phosphating film, pouring out the solvent after degreasing, and drying the inside and the outside of the pipe by using an exhaust fan.
7. The process method for producing the copper tube by refining, continuous casting, continuous rolling and stretching the waste copper according to claim 1, which is characterized in that: and D, after the step L is finished, cutting the copper pipe by using a cutting machine, and cutting, packaging and warehousing the copper pipe.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011144575.2A CN112251616A (en) | 2020-10-23 | 2020-10-23 | Process method for producing red copper pipe by refining, continuous casting, continuous rolling and stretching waste copper |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011144575.2A CN112251616A (en) | 2020-10-23 | 2020-10-23 | Process method for producing red copper pipe by refining, continuous casting, continuous rolling and stretching waste copper |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN112251616A true CN112251616A (en) | 2021-01-22 |
Family
ID=74263642
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202011144575.2A Pending CN112251616A (en) | 2020-10-23 | 2020-10-23 | Process method for producing red copper pipe by refining, continuous casting, continuous rolling and stretching waste copper |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN112251616A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113369826A (en) * | 2021-06-30 | 2021-09-10 | 福建紫金铜业有限公司 | Production process of copper pipe for pier mouth |
Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101698207A (en) * | 2009-10-20 | 2010-04-28 | 无锡隆达金属材料有限公司 | Method for producing copper alloy coil pipe |
| CN103752642A (en) * | 2013-12-23 | 2014-04-30 | 青岛润鑫伟业科贸有限公司 | Machining method for thick-walled seamless red copper pipe |
| CN104313334A (en) * | 2014-11-14 | 2015-01-28 | 宁波杭桥铜业有限公司 | Waste copper pretreating and refining technology |
| CN106191462A (en) * | 2016-08-30 | 2016-12-07 | 江西安讯实业股份有限公司 | A kind of production technology of copper scrap continuous casting and rolling |
| CN107304463A (en) * | 2016-04-22 | 2017-10-31 | 汤阴县天海碳素有限公司 | A kind of processing technology of low oxygen glitter copper lever |
| CN108673059A (en) * | 2018-04-27 | 2018-10-19 | 海亮（安徽）铜业有限公司 | A kind of moulding process of efficient copper tube |
| CN109971957A (en) * | 2017-12-27 | 2019-07-05 | 江西省丰城市鑫颖金属制品有限公司 | A kind of copper scrap recovery process |
| CN110681755A (en) * | 2019-11-20 | 2020-01-14 | 福建省金烨铜管配件有限公司 | High-performance seamless copper pipe stretch forming processing method |
-
2020
- 2020-10-23 CN CN202011144575.2A patent/CN112251616A/en active Pending
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101698207A (en) * | 2009-10-20 | 2010-04-28 | 无锡隆达金属材料有限公司 | Method for producing copper alloy coil pipe |
| CN103752642A (en) * | 2013-12-23 | 2014-04-30 | 青岛润鑫伟业科贸有限公司 | Machining method for thick-walled seamless red copper pipe |
| CN104313334A (en) * | 2014-11-14 | 2015-01-28 | 宁波杭桥铜业有限公司 | Waste copper pretreating and refining technology |
| CN107304463A (en) * | 2016-04-22 | 2017-10-31 | 汤阴县天海碳素有限公司 | A kind of processing technology of low oxygen glitter copper lever |
| CN106191462A (en) * | 2016-08-30 | 2016-12-07 | 江西安讯实业股份有限公司 | A kind of production technology of copper scrap continuous casting and rolling |
| CN109971957A (en) * | 2017-12-27 | 2019-07-05 | 江西省丰城市鑫颖金属制品有限公司 | A kind of copper scrap recovery process |
| CN108673059A (en) * | 2018-04-27 | 2018-10-19 | 海亮（安徽）铜业有限公司 | A kind of moulding process of efficient copper tube |
| CN110681755A (en) * | 2019-11-20 | 2020-01-14 | 福建省金烨铜管配件有限公司 | High-performance seamless copper pipe stretch forming processing method |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113369826A (en) * | 2021-06-30 | 2021-09-10 | 福建紫金铜业有限公司 | Production process of copper pipe for pier mouth |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN101825200B (en) | Titanium alloy TC4 hot-rolled tube and production method thereof | |
| CN107829002A (en) | A kind of production technology of solar energy aluminium alloy photovoltaic bracket | |
| CN104057260B (en) | A kind of processing method of rolled copper foil mother metal | |
| CN104607882B (en) | Copper alloy tube casting and roll process exempts from pickling method for manufacturing | |
| CN101824564A (en) | Titanium alloy TC4 cold-rolled tube and production method thereof | |
| CN107282686B (en) | A kind of production technology of short route half-hard state copper belt | |
| CN101259484A (en) | Scrap copper continuous casting and rolling low oxygen glitter copper lever production technology | |
| CN109402458A (en) | High-intensitive the lithium battery two-sided dark aluminium foil of 3003 alloys and its manufacturing method | |
| CN1899755A (en) | Method for producing nickel belt | |
| CN102168212A (en) | Aluminium alloy lamp cap material and production method of the aluminium alloy lamp cap material | |
| CN112251616A (en) | Process method for producing red copper pipe by refining, continuous casting, continuous rolling and stretching waste copper | |
| CN103740989A (en) | 5052 aluminum alloy base material for anodes, and method for producing 5052 aluminum alloy base material | |
| CN113684400A (en) | High-performance photovoltaic aluminum alloy frame and production process thereof | |
| CN106435273A (en) | High-plasticity corrosion-resistant Zn-Cu-Ti alloy and preparation method thereof | |
| CN101417384A (en) | Production method of low-carbon free-cutting steel | |
| CN111690855A (en) | Aluminum alloy extrusion material for bearing block and manufacturing method thereof | |
| CN114536018B (en) | Preparation technology for improving bending forming of copper-tin alloy strip | |
| CN105316575A (en) | Cold-heading wire for resonance rod and production method thereof | |
| CN116727587B (en) | TB5 titanium alloy wire and preparation method thereof | |
| CN113198867A (en) | Production process of copper strip | |
| CN117004848A (en) | Special aluminum alloy sheet for beverage cup produced by using recycled aluminum and processing method thereof | |
| CN107716586A (en) | A kind of processing method of the titanium alloy wire materials of spectacle frame | |
| CN105331846A (en) | Efficient and high-yield short flow special-shape copper alloy wire and processing process thereof | |
| CN113083891A (en) | Copper strip rolling production process flow | |
| CN113462936A (en) | Aluminum alloy ring-pull can pull ring and processing technology thereof |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20210122 |