CN103305747B - A kind of rod iron for electric conduction of electrolytic aluminum, steel claw type material and manufacture method thereof - Google Patents
A kind of rod iron for electric conduction of electrolytic aluminum, steel claw type material and manufacture method thereof Download PDFInfo
- Publication number
- CN103305747B CN103305747B CN201310259469.2A CN201310259469A CN103305747B CN 103305747 B CN103305747 B CN 103305747B CN 201310259469 A CN201310259469 A CN 201310259469A CN 103305747 B CN103305747 B CN 103305747B
- Authority
- CN
- China
- Prior art keywords
- steel
- rod iron
- type material
- electric conduction
- steel claw
- 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.)
- Expired - Fee Related
Links
Landscapes
- Conductive Materials (AREA)
Abstract
The invention belongs to aluminum electrolysis technology field；Overcome the deficiency that prior art exists, provide a kind of rod iron for electric conduction of electrolytic aluminum, steel claw type material and manufacture method thereof, utilize the conductive steel bar steel pawl resistivity of the method manufacture to be greatly reduced, hence it is evident that to improve its electric conductivity, save electric energy, save cost；In order to solve above-mentioned technical problem, the technical solution used in the present invention is: rod iron, steel pawl composition be, the carbon of 0.002%～0.005%, 0～the silicon of 0.03%, the manganese of 0.15%～0.25%, 0～the phosphorus of 0.007%, 0～the sulfur of 0.005%, 0～the nickel of 0.02%, 0～the copper of 0.02%, 0～the chromium of 0.02%, and it is mixed with Trace Cerium and other rare earth multiple element, 0～the nitrogen of 0.004%, remaining is ferrum；Molten iron pretreatment → converter → refining furnace → vacuum outgas → continuous casting → rolling before steel-making；Present invention is mainly used for electrolytic aluminium.
Description
Technical field
A kind of rod iron for electric conduction of electrolytic aluminum of the present invention, steel claw type material and manufacture method thereof, belong to aluminum electrolysis technology field.
Background technology
During Aluminum Electrolysis Production, cathode steel bar and anode steel claw are the final passages of electric energy transmission on electrolysis bath, are arranged on this
Rod iron in one section of passage and steel pawl, 900-950 DEG C of high-temperature baking to be born, it is desirable to it is organized at high operating temperatures and chemistry becomes
Point stable for extended periods of time will not change thus keep resistivity constant.And the rod iron of current domestic use and steel claw material, continuing
Under hot environment, (900-950 DEG C) tissue, chemical composition instability, promote resistivity to improve.The size of power consumption of powdered is straight
Connecing and affect current efficiency and ton aluminum power consumption (kwh), aluminium manufacturer of China and international aluminium manufacturer are to such as table 1:
Table 1
| Project | Domestic | International |
| Current efficiency (%) | 92-93 | 94-96 |
| Ton aluminum power consumption (kwh) | 13500-13800 | 13000-13200 |
| Groove life (my god) | 1800 | 2500 |
Cathode steel bar and anode steel claw resistivity under long term high temperature toasts is the lowest and stable the best thus, determines the electricity of ton aluminum
Consumption.
The existing general carbon structural steels of cathode steel bar material selection, is the steel of least significant end, and main grade of steel is Q235A or Q195A,
And anode steel claw uses steel scrap electric rangette to smelt, casting, the fluctuation of steel claw material composition is big, and harmful element content and gas contain
Amount height, in steel, impurity is many, and especially defect shrinkage cavity after casting, loose, bubble cannot eliminate and cause resistivity high, has a strong impact on
The electric conductivity of material.
Summary of the invention
Instant invention overcomes prior art exist deficiency, it is provided that a kind of rod iron for electric conduction of electrolytic aluminum, steel claw type material and
Manufacture method, utilizes the conduction rod iron of the method manufacture, steel pawl resistivity under continuous high temperature environment to be greatly reduced and keeps stable,
Significantly improve rod iron, steel pawl electric conductivity in high temperature environments, decrease rod iron, the voltage drop during electrolytic aluminium of the steel pawl
Loss, saves electric energy, has saved cost.
In order to solve above-mentioned technical problem, the technical solution used in the present invention is: a kind of rod iron for electric conduction of electrolytic aluminum, steel pawl
Section bar, containing weight ratio be:
The carbon of 0.005%～0.009%, 0～the silicon of 0.03%, the manganese of 0.15%～0.25%, 0～the phosphorus of 0.007%, 0～0.005%
Sulfur, 0～the nickel of 0.02%, 0～the copper of 0.02%, 0～the chromium of 0.02%, the rare-earth wires of 0.001%～0.002%, 0～0.004%
Nitrogen, remaining is ferrum.
Preferably, containing weight ratio it is:
The carbon of 0.002%～0.005%, 0～the silicon of 0.03%, the manganese of 0.15%～0.25%, 0～the phosphorus of 0.007%, 0～0.005%
Sulfur, 0～the nickel of 0.02%, 0～the copper of 0.02%, 0～the chromium of 0.02%, the rare-earth wires of 0.001%～0.002%, 0～0.004%
Nitrogen, remaining is ferrum.
Preferably, containing weight ratio it is:
The carbon of 0.005%～0.008%, 0～the silicon of 0.03%, the manganese of 0.15%～0.25%, 0～the phosphorus of 0.009%, 0～0.006%
Sulfur, 0～the nickel of 0.02%, 0～the copper of 0.02%, 0～the chromium of 0.02%, the rare-earth wires of 0.001%～0.002%, 0～0.007%
Nitrogen, remaining is ferrum.
A kind of manufacture is used for electric conduction of electrolytic aluminum rod iron, the method for steel claw type material, comprises the following steps:
The first step, molten iron pretreatment before steel-making, carry out desulfurization, dephosphorization and desiliconization；
Second step, converter, the end, top, is combined oxygen blast simultaneously；
3rd step, LF refining furnace, utilize high temperature to remove the objectionable impurities things such as sulphur removal further；
4th step, RH vacuum outgas, oxygen and the nitrogen of residual are removed, decarburization simultaneously；
5th step, continuous casting, carry out band electromagnetic agitation, the rare-earth wires of feeding 0.001%～0.002%, obtains profile workblank simultaneously.
Described profile workblank is carried out rolling and obtains conduction rod iron.
Being melted in intermediate frequency furnace by described profile workblank, then in evaporative pattern, cast molding obtains conductive steel pawl.
The present invention compared with prior art has the beneficial effect that electrolgtic aluminium cathode steel bar and anode steel claw material in the present invention,
In main optimization design material, the content of useful chemical element, removes further to harmful element content and the GN 2 content,
In crystallizer, add rare-earth wires during continuous casting, decrease inclusion content in material, improve the degree of purity of material, thus improve
Rod iron and the electric conductivity of steel pawl, reduce rod iron and the resistivity of steel pawl, and production cost is greatly reduced.
Detailed description of the invention
The present invention is during electrolytic aluminium, and in conduction rod iron and steel pawl, gas content is high, has a strong impact on the electric conductivity of material.Improve
The harmful element comparision contents such as table 2 in conduction rod iron i.e. steel pawl front and back.
Table 2 unit: %
Anode steel claw uses steel scrap electric rangette to smelt in the past, casting, and the fluctuation of steel claw material composition is big, harmful element content and
Gas content is high, and in steel, impurity is many, and especially defect shrinkage cavity after casting, loose, bubble cannot eliminate, the cathode steel after improvement
Rod uses most advanced large-scale smelting equipment and most up-to-date techniques with anode steel claw material, and Molten Steel Cleanliness is greatly improved, and gas content is little
In 50ppm, completely eliminate the defect that electric conductivity is had negative effect.
Material chemical composition composition and smelting mode that cathode for electrolyzing rod iron of the present invention and anode steel claw are selected are passed through to update,
Ultimately form, below for being partially improved process:
A: smelting process flow process is: converter → continuous casting → rolling.Raw material made by anode steel claw continuous casting billet, uses lost foam casting work
Skill casting, cathode steel bar roll forming.The resistivity of anode steel claw is less than 0.149 μ Ω .m.The resistivity of cathode steel bar
Less than 0.139 μ Ω .m.
The material chemical composition that cathode steel bar and anode steel claw are selected consists of: carbon 0.07-0.12%, silicon 0.05-0.08%, manganese
0.20-0.30%, phosphorus 0.012-0.018%, sulfur 0.01-0.015%, chromium is less than 0.1%, and nickel is less than 0.1%, and copper is less than 0.15%,
Nitrogen 0.03-0.05%, remaining is ferrum.
B: smelting process flow process is: converter → continuous casting → rolling.Raw material made by anode steel claw continuous casting billet, uses lost foam casting work
Skill casting, cathode steel bar roll forming.The resistivity of anode steel claw is less than 0.135 μ Ω .m.The resistivity of cathode steel bar
Less than 0.128 μ Ω .m.
The material chemical composition that cathode steel bar and anode steel claw are selected consists of: carbon 0.04-0.08%, silicon 0.03-0.06%, manganese
0.20-0.30%, phosphorus 0.010-0.015%, sulfur 0.01-0.015%, chromium is less than 0.04%, and nickel is less than 0.04%, and copper is less than 0.03%,
Nitrogen 0.025-0.035%, remaining is ferrum.
C: smelting process flow process is: molten iron pretreatment (desulfurization, dephosphorization) → converter before steel-making (end, top is combined oxygen blast) → refine
Stove (LF) → vacuum outgas (RH) → continuous casting (band electromagnetic agitation and feeding rare-earth wires) → rolling.Anode steel claw continuous casting billet
Make raw material, use lost foam casting process casting, cathode steel bar roll forming.The resistivity of anode steel claw is less than 0.115
μΩ.m.The resistivity of cathode steel bar is less than 0.107 μ Ω .m.
The material chemical composition that cathode steel bar and anode steel claw are selected consists of: carbon 0.005-0.010%, and silicon is less than 0.03%, manganese
0.15-0.25%, phosphorus is less than 0.009%, and sulfur is less than 0.008%, and chromium is less than 0.02%, and nickel is less than 0.03%, and copper is less than 0.02%,
Aluminum is at 0.04-0.06%, nitrogen 0.007-0.010%, the rare-earth wires of 0.001%～0.002%, and remaining is ferrum.
D: smelting process flow process is: molten iron pretreatment (desulfurization, dephosphorization) → converter before steel-making (end, top is combined oxygen blast) → refine
Stove (LF) → vacuum outgas (RH) → continuous casting (band electromagnetic agitation and feeding rare-earth wires) → rolling.Anode steel claw continuous casting billet
Make raw material, use lost foam casting process casting, cathode steel bar roll forming.The resistivity of anode steel claw is less than 0.105
μΩ.m.The resistivity of cathode steel bar is less than 0.10 μ Ω .m.
The material chemical composition that cathode steel bar and anode steel claw are selected consists of: carbon 0.002-0.005%, and silicon is less than 0.03%, manganese
0.15-0.25%, phosphorus is less than 0.009%, and sulfur is less than 0.005%, and chromium is less than 0.02%, and nickel is less than 0.03%, and copper is less than 0.02%,
Aluminum is less than 0.01%, and the nitrogen rare-earth wires less than 0.004%, 0.001%～0.002%, remaining is ferrum.
In the present invention, rare-earth wires used is purchased from Baotou group of the lanthanides new material Science and Technology Ltd., and described rare-earth wires is main and trace with cerium
It is mixed with other rare earth element multiple.
Embodiment 1
A kind of rod iron for electric conduction of electrolytic aluminum, steel claw type material, containing weight ratio be:
The carbon of 0.005%, the silicon of 0.001%, the manganese of 0.15%, the phosphorus of 0.003%, the sulfur of 0.002%, the nickel of 0.01%, 0.01%
Copper, the chromium of 0.01%, the rare-earth wires of 0.001%, the nitrogen of 0.002%, remaining is ferrum.
Embodiment 2
A kind of rod iron for electric conduction of electrolytic aluminum, steel claw type material, containing weight ratio be:
The carbon of 0.009%, the silicon of 0.03%, the manganese of 0.25%, the phosphorus of 0.007%, the sulfur of 0.005%, the nickel of 0.02%, 0.02%
Copper, the chromium of 0.02%, the rare-earth wires of 0.002%, the nitrogen of 0.004%, remaining is ferrum.
Embodiment 3
A kind of rod iron for electric conduction of electrolytic aluminum, steel claw type material, containing weight ratio be:
The carbon of 0.008%, the silicon of 0.02%, the manganese of 0.20%, the phosphorus of 0.005%, the sulfur of 0.003%, the nickel of 0.02%, 0.02%
Copper, the chromium of 0.02%, the rare-earth wires of 0.002%, the nitrogen of 0.003%, remaining is ferrum.
Embodiment 4
A kind of rod iron for electric conduction of electrolytic aluminum, steel claw type material, containing weight ratio be:
The carbon of 0.002%, the silicon of 0.01%, the manganese of 0.15%, the phosphorus of 0.001%, the sulfur of 0.001%, the nickel of 0.01%, 0.01%
Copper, the chromium of 0.01%, the rare-earth wires of 0.001%, the nitrogen of 0.001%, remaining is ferrum.
Embodiment 5
A kind of rod iron for electric conduction of electrolytic aluminum, steel claw type material, containing weight ratio be:
The carbon of 0.005%, the silicon of 0.03%, the manganese of 0.25%, the phosphorus of 0.007%, the sulfur of 0.005%, the nickel of 0.02%, 0.02%
Copper, the chromium of 0.02%, the rare-earth wires of 0.002%, the nitrogen of 0.004%, remaining is ferrum.
Embodiment 6
A kind of rod iron for electric conduction of electrolytic aluminum, steel claw type material, containing weight ratio be:
The carbon of 0.004%, the silicon of 0.02%, the manganese of 0.20%, the phosphorus of 0.004%, the sulfur of 0.003%, the nickel of 0.02%, 0.02%
Copper, the chromium of 0.02%, the rare-earth wires of 0.002%, the nitrogen of 0.004%, remaining is ferrum.
Embodiment 7
A kind of rod iron for electric conduction of electrolytic aluminum, steel claw type material, containing weight ratio be:
The carbon of 0.005%, the silicon of 0.01%, the manganese of 0.15%, the phosphorus of 0.001%, the sulfur of 0.001%, the nickel of 0.01%, 0.01%
Copper, the chromium of 0.01%, the rare-earth wires of 0.001%, the nitrogen of 0.001%, remaining is ferrum.
Embodiment 8
A kind of rod iron for electric conduction of electrolytic aluminum, steel claw type material, containing weight ratio be:
The carbon of 0.008%, the silicon of 0.03%, the manganese of 0.25%, the phosphorus of 0.009%, the sulfur of 0.006%, the nickel of 0.02%, 0.02%
Copper, the chromium of 0.02%, the rare-earth wires of 0.002%, the nitrogen of 0.007%, remaining is ferrum.
Embodiment 9
A kind of rod iron for electric conduction of electrolytic aluminum, steel claw type material, containing weight ratio be:
The carbon of 0.006%, the silicon of 0.02%, the manganese of 0.20%, the phosphorus of 0.005%, the sulfur of 0.004%, the nickel of 0.02%, 0.02%
Copper, the chromium of 0.02%, the rare-earth wires of 0.002%, the nitrogen of 0.007%, remaining is ferrum.
The present invention is a kind of to be manufactured described for electric conduction of electrolytic aluminum rod iron, the method for steel claw type material, comprises the following steps:
The first step, molten iron pretreatment before steel-making, carry out desulfurization, dephosphorization and desiliconization；
Second step, converter, the end, top, is combined oxygen blast simultaneously；
3rd step, LF refining furnace, utilize high temperature to remove sulphur removal, phosphorus and silicon objectionable impurities thing further；
4th step, RH vacuum outgas, oxygen and the nitrogen of residual are removed, decarburization simultaneously；
5th step, continuous casting, carry out band electromagnetic agitation, the rare-earth wires of feeding 0.001%～0.002%, obtains profile workblank simultaneously.
Described profile workblank is carried out rolling and obtains conduction rod iron.
Being melted in intermediate frequency furnace by described profile workblank, then in evaporative pattern, cast molding obtains conductive steel pawl.
Above embodiments of the invention are explained in detail, but the present invention is not limited to above-described embodiment, common in this area
In the ken that technical staff is possessed, it is also possible on the premise of without departing from present inventive concept, various changes can be made.
Claims (5)
1. one kind is used for the rod iron of electric conduction of electrolytic aluminum, steel claw type material, it is characterised in that containing weight ratio be:
The carbon of 0.005%～0.009%, 0.001～the silicon of 0.03%, the manganese of 0.15%～0.25%, 0.001～the phosphorus of 0.007%, 0.001～the sulfur of 0.005%, 0.01～the nickel of 0.02%, 0.01～the copper of 0.02%, 0.01～the chromium of 0.02%, the rare-earth wires of 0.001%～0.002%, 0.001～the nitrogen of 0.004%, remaining is ferrum.
2. one kind is used for the rod iron of electric conduction of electrolytic aluminum, steel claw type material, it is characterised in that containing weight ratio be:
The carbon of 0.002%～0.005%, 0.001～the silicon of 0.03%, the manganese of 0.15%～0.25%, 0.001～the phosphorus of 0.007%, 0.001～the sulfur of 0.005%, 0.01～the nickel of 0.02%, 0.01～the copper of 0.02%, 0.01～the chromium of 0.02%, the rare-earth wires of 0.001%～0.002%, 0.001～the nitrogen of 0.004%, remaining is ferrum.
3. one kind manufactures as claimed in claim 1 for electric conduction of electrolytic aluminum rod iron, the method for steel claw type material, it is characterised in that comprise the following steps:
The first step, molten iron pretreatment before steel-making, carry out desulfurization, dephosphorization and desiliconization；
Second step, converter, the end, top, is combined oxygen blast simultaneously；
3rd step, LF refining furnace, utilize high temperature to remove sulphur removal, phosphorus and silicon objectionable impurities thing further；
4th step, RH vacuum outgas, oxygen and the nitrogen of residual are removed, decarburization simultaneously；
5th step, continuous casting, carry out band electromagnetic agitation, the rare-earth wires of feeding 0.001%～0.002%, obtains profile workblank simultaneously.
A kind of manufacture the most according to claim 3 is used for electric conduction of electrolytic aluminum rod iron, the method for steel claw type material, it is characterised in that described profile workblank carries out rolling and obtains conduction rod iron.
A kind of manufacture the most according to claim 3 is used for electric conduction of electrolytic aluminum rod iron, the method for steel claw type material, it is characterised in that being melted in intermediate frequency furnace by described profile workblank, then in evaporative pattern, cast molding obtains conductive steel pawl.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310259469.2A CN103305747B (en) | 2013-06-26 | 2013-06-26 | A kind of rod iron for electric conduction of electrolytic aluminum, steel claw type material and manufacture method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310259469.2A CN103305747B (en) | 2013-06-26 | 2013-06-26 | A kind of rod iron for electric conduction of electrolytic aluminum, steel claw type material and manufacture method thereof |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN103305747A CN103305747A (en) | 2013-09-18 |
| CN103305747B true CN103305747B (en) | 2016-10-05 |
Family
ID=49131459
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201310259469.2A Expired - Fee Related CN103305747B (en) | 2013-06-26 | 2013-06-26 | A kind of rod iron for electric conduction of electrolytic aluminum, steel claw type material and manufacture method thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN103305747B (en) |
Families Citing this family (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103603011B (en) * | 2013-12-02 | 2015-12-30 | 青海金润冶金矿业有限公司 | The Bi-metal Steel Aluminum structure anode steel jaw of energy-conserving and environment-protective |
| CN105483752A (en) * | 2015-12-25 | 2016-04-13 | 武汉大学 | Recovery method of waste high-conductivity aluminum electrolysis cathode steel rod |
| CN105506673B (en) * | 2015-12-25 | 2018-06-19 | 武汉大学 | A kind of high conductivity pre-baked anode steel grab |
| CN106521557A (en) * | 2016-11-01 | 2017-03-22 | 秦皇岛秦冶重工有限公司 | Anode steel stud for electrolytic aluminum |
| CN107541751A (en) * | 2017-09-14 | 2018-01-05 | 高西胜 | A kind of Bi-metal Steel Aluminum cathode steel bar and preparation method thereof |
| CN112430773A (en) * | 2020-11-23 | 2021-03-02 | 首钢集团有限公司 | Preparation method and application of steel for battery case |
| CN115896640A (en) * | 2022-12-30 | 2023-04-04 | 贵阳铝镁设计研究院有限公司 | Pure iron energy-saving anode steel claw material and heat treatment method and application thereof |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101397643A (en) * | 2008-09-23 | 2009-04-01 | 兰州连城陇兴铝业有限责任公司 | Novel phosphorus and sulphur pig iron for aluminum electrolysis |
| CN101857944A (en) * | 2010-06-13 | 2010-10-13 | 中国铝业股份有限公司 | Anode steel claw material for aluminum electrolysis |
| CN102634735A (en) * | 2012-04-09 | 2012-08-15 | 广州市奥赛钢线科技有限公司 | Spring steel used for automobile suspension as well as preparation method and application thereof |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102691009B (en) * | 2012-05-28 | 2013-11-27 | 牛自院 | High-temperature and high-conductivity alloy material and application thereof in electrode |
-
2013
- 2013-06-26 CN CN201310259469.2A patent/CN103305747B/en not_active Expired - Fee Related
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101397643A (en) * | 2008-09-23 | 2009-04-01 | 兰州连城陇兴铝业有限责任公司 | Novel phosphorus and sulphur pig iron for aluminum electrolysis |
| CN101857944A (en) * | 2010-06-13 | 2010-10-13 | 中国铝业股份有限公司 | Anode steel claw material for aluminum electrolysis |
| CN102634735A (en) * | 2012-04-09 | 2012-08-15 | 广州市奥赛钢线科技有限公司 | Spring steel used for automobile suspension as well as preparation method and application thereof |
Also Published As
| Publication number | Publication date |
|---|---|
| CN103305747A (en) | 2013-09-18 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN103305747B (en) | A kind of rod iron for electric conduction of electrolytic aluminum, steel claw type material and manufacture method thereof | |
| CN105551688B (en) | Preparation method of high-accuracy anaerobic bright copper bar | |
| CN105624737B (en) | A kind of method for preparing magnesium-rare earth and rare-earth yttrium neodymium magnesium alloy | |
| CN101469370A (en) | Method for manufacturing large-sized high purity 12Cr% low-ilicon low-aluminum electroslag remelting steel ingot | |
| CN105483323A (en) | Manufacturing method of 12Cr13 pipe blank for nuclear power plant reactor control rod drive mechanism | |
| CN104862552A (en) | Novel aluminum alloy and preparation method thereof | |
| CN105908218B (en) | A kind of high pure rare earth metals and its production and use | |
| CN103555960A (en) | Slag system for ingot drawing electroslag remelting superaustenitic stainless steel | |
| CN110295332A (en) | A kind of pre- hard mold steel of the high mirror surface of high tenacity and its manufacturing process | |
| CN101770828A (en) | High-conductivity non-heat treatment type rare-earth thermal-resistant aluminium alloy conductor material | |
| CN101768691A (en) | Productive technology of short flow of structure type cast iron part | |
| CN109777919A (en) | Reduce the remelting method and remelting slag system of ESR ingot oxygen content | |
| CN104264053A (en) | Production method of raw material pure iron rod for NdFeB (neodymium iron boron) | |
| CN101519747A (en) | Rare-earth aluminum-calcium-iron alloy | |
| CN104107889A (en) | Horizontal-continuous-casting production process and graphite die device of large-section nodular cast iron | |
| CN107217172A (en) | One Albatra metal casting technique | |
| CN106834889A (en) | Cerium-iron alloy and preparation method thereof | |
| CN105567989B (en) | The smelting process of clean Electro Slag Remelting Steel | |
| CN111850340A (en) | High-conductivity and high-hardness chromium-zirconium-copper alloy, preparation method and application thereof | |
| CN113430579A (en) | Preparation method of lanthanum-iron alloy | |
| CN103409709B (en) | Manufacturing technology for toriconical head | |
| CN105441736A (en) | Composite aluminum-alloy conductor special used for ultrahigh pressure | |
| CN113279018B (en) | Use of praseodymium neodymium iron alloy in rare earth steel | |
| CN110029239B (en) | Oxygen-free copper production process | |
| CN108179354B (en) | A kind of high conductivity band steel and its smelting process and application |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20161005 Termination date: 20170626 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |