CN115255298A - Preparation method of copper and copper alloy ingot casting for solving microscopic defects in ingot casting - Google Patents
Preparation method of copper and copper alloy ingot casting for solving microscopic defects in ingot casting Download PDFInfo
- Publication number
- CN115255298A CN115255298A CN202210874116.2A CN202210874116A CN115255298A CN 115255298 A CN115255298 A CN 115255298A CN 202210874116 A CN202210874116 A CN 202210874116A CN 115255298 A CN115255298 A CN 115255298A
- Authority
- CN
- China
- Prior art keywords
- copper
- casting
- stopper rod
- furnace
- ingot
- 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
- 238000005266 casting Methods 0.000 title claims abstract description 36
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 title claims abstract description 29
- 239000010949 copper Substances 0.000 title claims abstract description 29
- 229910052802 copper Inorganic materials 0.000 title claims abstract description 28
- 229910000881 Cu alloy Inorganic materials 0.000 title claims abstract description 15
- 230000007547 defect Effects 0.000 title claims abstract description 13
- 238000002360 preparation method Methods 0.000 title claims abstract description 13
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims abstract description 40
- 229910002804 graphite Inorganic materials 0.000 claims abstract description 40
- 239000010439 graphite Substances 0.000 claims abstract description 40
- 239000007788 liquid Substances 0.000 claims abstract description 14
- 238000000034 method Methods 0.000 claims abstract description 5
- 238000004321 preservation Methods 0.000 claims description 8
- 238000003723 Smelting Methods 0.000 claims description 7
- 239000003610 charcoal Substances 0.000 claims description 6
- 239000004570 mortar (masonry) Substances 0.000 claims description 6
- 230000003647 oxidation Effects 0.000 claims description 6
- 238000007254 oxidation reaction Methods 0.000 claims description 6
- 239000000463 material Substances 0.000 claims description 5
- 239000006229 carbon black Substances 0.000 claims description 3
- 239000011248 coating agent Substances 0.000 claims description 3
- 238000000576 coating method Methods 0.000 claims description 3
- 239000004615 ingredient Substances 0.000 claims description 3
- 238000004519 manufacturing process Methods 0.000 abstract description 5
- 230000007797 corrosion Effects 0.000 abstract description 4
- 238000005260 corrosion Methods 0.000 abstract description 4
- 238000000354 decomposition reaction Methods 0.000 abstract description 4
- 239000002184 metal Substances 0.000 abstract description 2
- 229910052751 metal Inorganic materials 0.000 abstract description 2
- 239000000047 product Substances 0.000 description 4
- 239000012535 impurity Substances 0.000 description 3
- 230000000694 effects Effects 0.000 description 2
- 239000003921 oil Substances 0.000 description 2
- 239000002994 raw material Substances 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 238000005530 etching Methods 0.000 description 1
- 239000012467 final product Substances 0.000 description 1
- 239000007789 gas Substances 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 239000000155 melt Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 229910021332 silicide Inorganic materials 0.000 description 1
- FVBUAEGBCNSCDD-UHFFFAOYSA-N silicide(4-) Chemical compound [Si-4] FVBUAEGBCNSCDD-UHFFFAOYSA-N 0.000 description 1
Classifications
-
- 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
- B22D11/10—Supplying or treating molten metal
- B22D11/11—Treating the molten metal
- B22D11/111—Treating the molten metal by using protecting powders
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
- B22D41/00—Casting melt-holding vessels, e.g. ladles, tundishes, cups or the like
- B22D41/14—Closures
- B22D41/16—Closures stopper-rod type, i.e. a stopper-rod being positioned downwardly through the vessel and the metal therein, for selective registry with the pouring opening
- B22D41/18—Stopper-rods therefor
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Continuous Casting (AREA)
- Manufacture And Refinement Of Metals (AREA)
Abstract
The invention belongs to the technical field of nonferrous metal ingot production, and particularly relates to a preparation method of a copper or copper alloy ingot with good tissue uniformity and few internal defects, in particular to a preparation method of a copper or copper alloy ingot for solving the microscopic defects in the ingot. According to the method, the silicified graphite is used for replacing a conventional graphite piece, so that the stability of the casting process is improved, the factors such as corrosion and decomposition of the conventional graphite are eliminated, the microstructure of the cast ingot is improved, the performance of a processed product is improved, the internal microscopic defects of the copper or copper alloy cast ingot are overcome, and the performance uniformity of the processed product at the later stage is improved. On the basis of conventional casting technology, the invention adopts corrosion-resistant, heat-resistant and non-decomposition product siliconized graphite to control and guide the copper liquid, and completes the casting process. The invention can improve the internal microscopic defects of the copper or copper alloy cast ingot, and the performance uniformity and the internal stress index of the produced high-precision copper strip are greatly improved.
Description
Technical Field
The invention belongs to the technical field of nonferrous metal ingot production, and particularly relates to a preparation method of a copper or copper alloy ingot with good tissue uniformity and few internal defects, in particular to a preparation method of a copper or copper alloy ingot for solving the microscopic defects in the ingot.
Background
Copper or copper alloy strip mainly use in integrated circuit, LED, electron connector etc. electron use field, along with intelligent continuous promotion and equipment volume's continuous shrink, put forward higher requirement to strip homogeneity, performance guarantee ability.
During the casting of copper and copper alloys, it is necessary to control the effects of ambient gases or impurities and to ensure that no new effects are created within the casting system. Compared with a furnace body, common graphite is high-temperature resistant and good in vibration resistance, but is fragile, poor in impact resistance and thermal stability, copper is large in specific gravity, the temperature of a melt is about 1200 ℃, the graphite is continuously corroded in the impact process of copper liquid, decomposition products can randomly react to generate compounds and deposit in an ingot, the subsequent processing process cannot be eliminated, and particularly stress, structural uniformity and the like of a high-precision copper strip are influenced.
The invention adopts the material of the siliconized graphite piece to control and improve the microscopic quality inside the ingot casting and improve the service performance of the final product in the casting process.
Disclosure of Invention
The invention provides a preparation method of copper and copper alloy ingots for solving the microscopic defects in the ingots, which adopts graphite silicide for guiding the flow of copper liquid and controlling the flow, thereby improving the occurrence probability of the microscopic defects in the ingots and reducing the production of second-phase substances. The silicified graphite has stable chemical performance, almost has no corrosion in the casting process, has the service life longer than that of a furnace body, improves the processing performance of subsequent copper strip products, and meets the process requirements of stamping, etching and the like.
The production process route of the ingot casting comprises the following steps: the invention relates to a preparation method of copper and copper alloy ingots for solving the microscopic defects in the ingots, which comprises the following steps:
s1, preparation:
s11, preparing a standard siliconized graphite piece by using siliconized graphite according to a preset size, wherein the standard siliconized graphite piece is provided with a siliconized graphite sleeve, a cone, a stopper rod and a casting pipe respectively;
s12, uniformly coating refractory mortar on the periphery of a silicified graphite sleeve, controlling the thickness of the refractory mortar within the range of 1-5cm, and placing the silicified graphite sleeve into a reserved leveling position of a furnace head box at the bottom of a heat preservation furnace to ensure that the silicified graphite sleeve is aligned with the position of a crystallizer;
s13, a casting pipe is arranged at a casting opening of a furnace end box, a cone body and a stopper rod are arranged in a siliconized graphite sleeve, an upper inlet of the casting pipe is connected with a lower outlet of the cone body, the lower part of the stopper rod is positioned in the cone body, and the bottom of the stopper rod is tightly matched with the inner surface of the cone body;
s2, preparing materials: the prepared raw materials cannot contain water and oil, and impurities cannot be mixed in;
s3, smelting: putting the ingredients into a smelting furnace, adjusting the temperature to a proper value, and covering charcoal to prevent oxidation and air suction;
s4, heat preservation: transferring the smelted copper liquid into a heat preservation furnace, adjusting the temperature to a proper casting temperature, and covering charcoal for preventing oxidation and air suction;
s5, casting:
s51, preheating the furnace end box for 1-5 times;
s52, after the position of the pouring gate of the furnace end box is aligned with the position of the crystallizer, the position of the stopper rod is adjusted, a gap is formed between the bottom of the stopper rod and the inner surface of the cone, copper liquid is discharged from the gap between the stopper rod and the cone and the pouring pipe for casting, the liquid level in the crystallizer is kept stable without obvious fluctuation, and the liquid level is uniformly covered by carbon black.
In the steps S11 and S5, the use of the silicified graphite improves the stability of the casting process, eliminates factors such as corrosion and decomposition of conventional graphite, improves the microstructure of the cast ingot, and improves the performance of a processed product.
Compared with the prior art, the invention has the beneficial effects that:
1) The silicified graphite has high stability, heat resistance and almost no burning loss. Under the normal production condition, the conventional graphite piece is obviously burnt in less than 1 day, the service life of the siliconized graphite piece is longer than that of a furnace body, and the siliconized graphite piece can be repeatedly used for many times;
2) The pollution of the siliconized graphite to the copper liquid is reduced;
3) The structure uniformity and the internal stress of the strip processed by the cast ingot are improved.
Detailed Description
The following examples are intended to illustrate the invention but are not intended to limit the scope of the invention. Unless otherwise specified, the examples follow conventional experimental conditions. In addition, it will be apparent to those skilled in the art that various modifications or improvements can be made to the material components and amounts in these embodiments without departing from the spirit and scope of the invention as defined in the appended claims.
Example 1
A preparation method of copper and copper alloy ingots for solving the internal microscopic defects of the ingots comprises the following steps:
s1, preparation:
s11, preparing a standard siliconized graphite piece by using siliconized graphite according to a preset size, wherein the standard siliconized graphite piece is provided with a siliconized graphite sleeve, a cone, a stopper rod and a casting pipe respectively;
s12, uniformly coating refractory mortar on the periphery of a silicified graphite sleeve, controlling the thickness of the refractory mortar within the range of 1-5cm, and placing the silicified graphite sleeve into a reserved leveling position of a furnace head box at the bottom of a heat preservation furnace to ensure that the silicified graphite sleeve is aligned with the position of a crystallizer;
s13, a casting pipe is arranged at a casting opening of a furnace end box, a cone body and a stopper rod are arranged in a siliconized graphite sleeve, an upper inlet of the casting pipe is connected with a lower outlet of the cone body, the lower part of the stopper rod is positioned in the cone body, and the bottom of the stopper rod is tightly matched with the inner surface of the cone body;
s2, preparing materials: the prepared raw materials cannot contain water and oil, and impurities cannot be mixed in;
s3, smelting: putting the ingredients into a smelting furnace, adjusting the temperature to a proper value, and covering charcoal to prevent oxidation and air suction;
s4, heat preservation: transferring the molten copper in the smelting furnace to a holding furnace, adjusting the temperature to a proper casting temperature, and covering charcoal to prevent oxidation and air suction;
s5, casting:
s51, preheating a furnace end box for 3 times at 1200 ℃;
s52, after the position of a pouring port of the furnace end box is aligned with the position of the crystallizer, the position of a stopper rod is adjusted, a gap is formed between the bottom of the stopper rod and the inner surface of a cone, copper liquid is discharged from the gap between the stopper rod and the cone and a pouring pipe for casting, the liquid level in the crystallizer is kept stable without obvious fluctuation and is uniformly covered by carbon black;
s53, the casting speed is 50mm/min, the structural uniformity of the strip product after the cast ingot is processed is consistent, the surface color is consistent, and the internal stress meets the requirement.
Claims (1)
1. A preparation method of copper and copper alloy ingots for solving the microscopic defects in the ingots is characterized by comprising the following steps: the method comprises the following steps:
s1, preparation:
s11, preparing a standard siliconized graphite piece by using siliconized graphite according to a preset size, wherein the standard siliconized graphite piece is provided with a siliconized graphite sleeve, a cone, a stopper rod and a casting pipe respectively;
s12, uniformly coating refractory mortar on the periphery of the siliconized graphite sleeve, controlling the thickness of the refractory mortar within the range of 1-5cm, and filling the siliconized graphite sleeve into a reserved leveling position of a furnace head box at the bottom of a heat preservation furnace to ensure that the siliconized graphite sleeve is aligned with the position of a crystallizer;
s13, a casting pipe is arranged at a casting opening of the furnace end box, a cone body and a stopper rod are arranged in a siliconized graphite sleeve, an upper inlet of the casting pipe is connected with a lower outlet of the cone body, the lower part of the stopper rod is positioned in the cone body, and the bottom of the stopper rod is tightly matched with the inner surface of the cone body;
s2, preparing materials;
s3, smelting: putting the ingredients into a smelting furnace, adjusting the temperature to a proper value, and covering charcoal to prevent oxidation and air suction;
s4, heat preservation: transferring the smelted copper liquid into a heat preservation furnace, adjusting the smelted copper liquid to a proper casting temperature, and covering charcoal to prevent oxidation and air suction;
s5, casting:
s51, preheating the furnace end box for 1-5 times;
s52, after the position of the pouring gate of the furnace end box is aligned with the position of the crystallizer, the position of the stopper rod is adjusted, a gap is formed between the bottom of the stopper rod and the inner surface of the cone, copper liquid is discharged from the gap between the stopper rod and the cone and the pouring pipe for casting, and the liquid level in the crystallizer is kept stable and is uniformly covered by carbon black.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210874116.2A CN115255298A (en) | 2022-07-25 | 2022-07-25 | Preparation method of copper and copper alloy ingot casting for solving microscopic defects in ingot casting |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210874116.2A CN115255298A (en) | 2022-07-25 | 2022-07-25 | Preparation method of copper and copper alloy ingot casting for solving microscopic defects in ingot casting |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN115255298A true CN115255298A (en) | 2022-11-01 |
Family
ID=83768899
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202210874116.2A Pending CN115255298A (en) | 2022-07-25 | 2022-07-25 | Preparation method of copper and copper alloy ingot casting for solving microscopic defects in ingot casting |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN115255298A (en) |
Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| SU129311A1 (en) * | 1959-07-16 | 1959-11-30 | Т.Е. Ильин | Electric bath stove |
| CN1654690A (en) * | 2004-02-13 | 2005-08-17 | 上海金泰铜业有限公司 | Copper alloy material for integrated circuit lead frame and manufacturing process thereof |
| CN101139669A (en) * | 2006-09-04 | 2008-03-12 | 中铝上海铜业有限公司 | Copper strip for framework, connector and packaging member and method for manufacturing same |
| CN203711824U (en) * | 2014-02-18 | 2014-07-16 | 太原晋西春雷铜业有限公司 | Flow control device for furnace head box of copper alloy holding furnace |
| RU2532778C1 (en) * | 2013-05-06 | 2014-11-10 | Игорь Юрьевич Русаков | Unit for continuous metallothermic obtainment of metals and alloys |
| CN104550792A (en) * | 2014-10-17 | 2015-04-29 | 江西鸥迪铜业有限公司 | Horizontal continuous casting copper ingot production technology |
| CN108149038A (en) * | 2017-12-07 | 2018-06-12 | 陕西省军工（集团）陕铜有限责任公司 | A kind of process for improving copper or copper alloy conductivity |
| CN108504892A (en) * | 2018-05-10 | 2018-09-07 | 沈阳有色金属加工有限公司 | Iron-copper bar |
| CN110343870A (en) * | 2019-07-26 | 2019-10-18 | 浙江天宁合金材料有限公司 | A kind of oxygen-free copper founding production method |
-
2022
- 2022-07-25 CN CN202210874116.2A patent/CN115255298A/en active Pending
Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| SU129311A1 (en) * | 1959-07-16 | 1959-11-30 | Т.Е. Ильин | Electric bath stove |
| CN1654690A (en) * | 2004-02-13 | 2005-08-17 | 上海金泰铜业有限公司 | Copper alloy material for integrated circuit lead frame and manufacturing process thereof |
| CN101139669A (en) * | 2006-09-04 | 2008-03-12 | 中铝上海铜业有限公司 | Copper strip for framework, connector and packaging member and method for manufacturing same |
| RU2532778C1 (en) * | 2013-05-06 | 2014-11-10 | Игорь Юрьевич Русаков | Unit for continuous metallothermic obtainment of metals and alloys |
| CN203711824U (en) * | 2014-02-18 | 2014-07-16 | 太原晋西春雷铜业有限公司 | Flow control device for furnace head box of copper alloy holding furnace |
| CN104550792A (en) * | 2014-10-17 | 2015-04-29 | 江西鸥迪铜业有限公司 | Horizontal continuous casting copper ingot production technology |
| CN108149038A (en) * | 2017-12-07 | 2018-06-12 | 陕西省军工（集团）陕铜有限责任公司 | A kind of process for improving copper or copper alloy conductivity |
| CN108504892A (en) * | 2018-05-10 | 2018-09-07 | 沈阳有色金属加工有限公司 | Iron-copper bar |
| CN110343870A (en) * | 2019-07-26 | 2019-10-18 | 浙江天宁合金材料有限公司 | A kind of oxygen-free copper founding production method |
Non-Patent Citations (2)
| Title |
|---|
| 姜业欣;肖柱;: "富氧铜生产工艺控制要点", 科技创新与应用, no. 27, pages 103 - 106 * |
| 郭丽丽;赵洪山;: "薄软紫铜带C1100的产业化生产", 中国有色金属, vol. 1, no. 1, pages 378 - 375 * |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN110899677B (en) | Module for pouring high-temperature alloy master alloy and independent heating and die assembling method of splitter plate | |
| US20040105483A1 (en) | Method and apparatus for solidification-controllable induction melting of alloy with cold copper crucible | |
| CN108339953A (en) | It is a kind of it is antivacuum under draw the production technology of continuous casting chromium-zirconium-copper slab ingot | |
| CN112430767B (en) | Large-size hollow ingot casting and ingot casting method | |
| CN114015890B (en) | High-alloying high-temperature alloy electroslag remelting slag system and application thereof | |
| CN110453108B (en) | Preparation method of non-vacuum semi-continuous induction smelting aluminum-copper white material | |
| CN116422853B (en) | Die steel and continuous casting production method thereof | |
| CN114410999A (en) | Continuous casting and rolling production process of 3014 aluminum alloy plate strip | |
| CN108660320A (en) | A kind of low-aluminium high titanium-type high temperature alloy electroslag remelting process | |
| CN115255298A (en) | Preparation method of copper and copper alloy ingot casting for solving microscopic defects in ingot casting | |
| CN111139364A (en) | Manufacturing method of over 40 tons of 9Ni large steel ingots | |
| CN110438378A (en) | A kind of 2 line aluminium alloy melting and casting methods | |
| CN116463519A (en) | Aluminum alloy smelting process | |
| CN111004935A (en) | Preparation method of high-purity aluminum-strontium intermediate alloy wire | |
| CN112760456B (en) | Bismuth-containing oriented silicon steel smelting method enabling bismuth yield to be not less than 70% | |
| CN112680621B (en) | Modification method of thin-wall medical seat aluminum alloy precision casting | |
| CN111168021B (en) | Casting process of aluminum alloy round ingot for forging hub | |
| CN112593124A (en) | Composite core material aluminum alloy flat ingot and manufacturing method thereof | |
| CN115449656B (en) | Preparation method of high-purity chromium-based alloy | |
| CN215628209U (en) | Vacuum distillation stove discharging device | |
| CN105369013B (en) | The method for controlling N content in GCr15 bearing steels | |
| CN114164317B (en) | Method for accurately controlling Als component of high-magnetic-induction oriented silicon steel continuous casting billet | |
| CN218179616U (en) | Structure of jacking type casting crucible | |
| CN113652562B (en) | Protective smelting and pouring method of manganese-nickel-copper alloy | |
| CN112011694B (en) | Ingot pulling method for smelting TA10 titanium alloy slab ingot in EB (Electron Beam) furnace |
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 |