CN113278828A - Preparation process for homogenizing C19400 copper alloy cast ingot structure - Google Patents
Preparation process for homogenizing C19400 copper alloy cast ingot structure Download PDFInfo
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- 229910000881 Cu alloy Inorganic materials 0.000 title claims abstract description 53
- 238000002360 preparation method Methods 0.000 title claims abstract description 14
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims abstract description 113
- 239000002994 raw material Substances 0.000 claims abstract description 70
- 229910052742 iron Inorganic materials 0.000 claims abstract description 45
- 238000005266 casting Methods 0.000 claims abstract description 29
- 239000000463 material Substances 0.000 claims abstract description 13
- 238000004321 preservation Methods 0.000 claims abstract description 11
- 238000003723 Smelting Methods 0.000 claims abstract description 8
- 239000007788 liquid Substances 0.000 claims description 52
- 230000006698 induction Effects 0.000 claims description 45
- 239000010949 copper Substances 0.000 claims description 28
- 229910052802 copper Inorganic materials 0.000 claims description 27
- 229910045601 alloy Inorganic materials 0.000 claims description 24
- 239000000956 alloy Substances 0.000 claims description 24
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims description 18
- 238000010438 heat treatment Methods 0.000 claims description 18
- 238000000034 method Methods 0.000 claims description 14
- RIRXDDRGHVUXNJ-UHFFFAOYSA-N [Cu].[P] Chemical compound [Cu].[P] RIRXDDRGHVUXNJ-UHFFFAOYSA-N 0.000 claims description 13
- 229910052698 phosphorus Inorganic materials 0.000 claims description 13
- 239000011701 zinc Substances 0.000 claims description 12
- HCHKCACWOHOZIP-UHFFFAOYSA-N Zinc Chemical compound [Zn] HCHKCACWOHOZIP-UHFFFAOYSA-N 0.000 claims description 11
- 229910052725 zinc Inorganic materials 0.000 claims description 11
- 239000000945 filler Substances 0.000 claims description 10
- 239000012535 impurity Substances 0.000 claims description 9
- 229910017827 Cu—Fe Inorganic materials 0.000 claims description 5
- 239000003610 charcoal Substances 0.000 claims description 5
- 239000000498 cooling water Substances 0.000 claims description 5
- 239000000843 powder Substances 0.000 claims description 5
- 238000003756 stirring Methods 0.000 claims description 5
- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 claims description 4
- 239000011574 phosphorus Substances 0.000 claims description 4
- IYRDVAUFQZOLSB-UHFFFAOYSA-N copper iron Chemical compound [Fe].[Cu] IYRDVAUFQZOLSB-UHFFFAOYSA-N 0.000 claims description 3
- 239000000203 mixture Substances 0.000 claims description 2
- 238000002844 melting Methods 0.000 abstract description 11
- 230000008018 melting Effects 0.000 abstract description 11
- 238000004519 manufacturing process Methods 0.000 abstract description 7
- 238000009826 distribution Methods 0.000 abstract description 5
- 238000005096 rolling process Methods 0.000 abstract description 5
- 239000002893 slag Substances 0.000 abstract description 3
- 239000000654 additive Substances 0.000 description 2
- 230000000996 additive effect Effects 0.000 description 2
- 230000005587 bubbling Effects 0.000 description 2
- 230000007547 defect Effects 0.000 description 2
- 239000007787 solid Substances 0.000 description 2
- 241001424392 Lucia limbaria Species 0.000 description 1
- 229910000805 Pig iron Inorganic materials 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000003754 machining Methods 0.000 description 1
- 239000000155 melt Substances 0.000 description 1
- 238000010309 melting process Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000007747 plating Methods 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 239000010409 thin film Substances 0.000 description 1
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C1/00—Making non-ferrous alloys
- C22C1/02—Making non-ferrous alloys by melting
- C22C1/03—Making non-ferrous alloys by melting using master alloys
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
- B22D7/00—Casting ingots, e.g. from ferrous metals
- B22D7/005—Casting ingots, e.g. from ferrous metals from non-ferrous metals
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C9/00—Alloys based on copper
Abstract
A preparation process for homogenizing a C19400 copper alloy ingot casting structure belongs to the technical field of C19400 copper alloy ingot casting, solves the technical problems of iron element component enrichment and uneven distribution during ingot casting, and comprises the following steps: material preparation → raw material melting → first element content analysis → component adjustment → second element content analysis → converter → holding furnace for heat preservation and standing → third element content analysis → casting. The C19400 copper alloy cast ingot prepared by the preparation process provided by the invention has stable iron element content and uniform structure, effectively controls the phenomenon of iron element enrichment and unevenness, greatly reduces the appearance of peeling and slag falling caused by the unevenness of iron on the surface of a strip in the subsequent rolling process, and avoids the phenomenon of strip holes. Meanwhile, as the crucible furnace is adopted to melt the industrial pure iron independently, the time for smelting the C19400 copper alloy raw material is shortened, the production efficiency is improved, and the raw material cost is not increased basically.
Description
Technical Field
The invention belongs to the technical field of casting of C19400 copper alloy cast ingots, and particularly relates to a preparation process for homogenizing a C19400 copper alloy cast ingot structure.
Background
The C19400 copper alloy strip product is widely used in the electronic fields of integrated circuits, LED lighting, connecting device materials, etc. because it has moderate strength, high conductivity, high-temperature softening resistance, excellent workability and plating property, etc.
The main additive elements in the C19400 copper alloy are iron and phosphorus, and in the smelting process, the addition of the iron element usually adopts two modes of adding Cu-Fe intermediate alloy or adding industrial pure iron. In order to reduce the production cost, enterprises mostly adopt a mode of adding industrial pure iron to produce the C19400 copper alloy. Because the melting point of iron is 1535 ℃, which is 450 ℃ higher than that of copper, and the melting temperature of C19400 copper alloy is about 1200 ℃, the industrial pure iron does not reach the melting point and is melted in the melting process of the C19400 copper alloy, and the industrial pure iron can be melted only by adopting the 'bubbling' process for prolonging the melting time, so that the C19400 copper alloy melt with more uniform components is obtained, and the 'bubbling' process not only increases the production cost, but also greatly reduces the production efficiency. In the industry, industrial pure iron is used as an additive to produce a C19400 copper alloy ingot, wherein the uniformity of iron element seriously affects the quality of the high-precision C19400 integrated circuit lead frame copper strip, the iron element is enriched and unevenly distributed to cause the phenomenon of uneven structure of the C19400 copper alloy ingot, so that in the subsequent processing of the C19400 copper alloy ingot into the high-precision C19400 integrated circuit lead frame copper strip, the defects of peeling and slag (small copper scraps) on the surface of the strip are caused by the enrichment and uneven distribution of the iron element, and holes and strip breakage phenomena even occur after the C19400 copper alloy is rolled to a certain degree, thereby seriously affecting the quality and yield of the C19400 copper strip product.
Disclosure of Invention
In order to overcome the defects of the prior art and solve the technical problems of enrichment and uneven distribution of iron element components during casting of a C19400 copper alloy cast ingot, the invention provides a preparation process for homogenizing a C19400 copper alloy cast ingot structure.
The invention is realized by the following technical scheme.
A preparation process for homogenizing a C19400 copper alloy cast ingot structure comprises the following steps:
s1, preparing standard electrolytic copper, industrial pure iron, zinc ingots, copper-phosphorus master alloy, copper-iron master alloy and C19400 copper alloy leftover materials according to the raw materials and the mass percentage content thereof;
s2, smelting raw materials:
firstly, adding standard electrolytic copper and C19400 copper alloy leftover materials into a medium-frequency induction furnace, setting the heating temperature of the medium-frequency induction furnace at 1100-1200 ℃, and heating the medium-frequency induction furnace until a filler is in a completely molten liquid state or an incompletely molten solid-liquid mixed state; meanwhile, adding the industrial pure iron into the crucible furnace, setting the heating temperature of the crucible furnace to 1600-; secondly, adding molten iron into a medium-frequency induction furnace, and uniformly stirring the mixed filler in the medium-frequency induction furnace; thirdly, adding the zinc ingot and the copper-phosphorus intermediate alloy into the medium-frequency induction furnace until all the raw materials are completely melted to be in a liquid state; finally, covering the liquid level of the raw material melted in the medium-frequency induction furnace with red charcoal powder;
s3, first element content analysis: performing a first elemental content analysis on the completely melted liquid raw material of step S2;
s4, adjusting components: comparing the result of the first element content analysis in the step S3 with the content of each element set in the finished product, and adjusting the content of the elements in the liquid raw material;
s5, analyzing the content of elements for the second time: performing element content analysis on the raw material with the components adjusted in the step S4 for the second time, and preparing to enter a converter process after the element content meets the set requirement;
s6, converter: setting the temperature of the converter to 1200 and 1260 ℃, and transferring the liquid raw material in the medium-frequency induction furnace to a heat preservation furnace;
s7, analyzing the content of the third element: performing full component analysis (namely stokehole analysis) on each element on the liquid raw material in the heat preservation furnace, adjusting the content of each element according to the requirement, and analyzing again until the content of each element in the liquid raw material meets the requirement of the content of each element set in the finished product;
s8, maintaining the temperature of a holding furnace and standing: the heat preservation temperature is 1200-1230 ℃, and the mixture is kept standing for 30-50 minutes;
s9, casting: the liquid raw material after the heat preservation and standing in the step S8 is poured into a mold to start casting.
Further, in the step S1, the content of the phosphorus element in the copper-phosphorus master alloy is 10wt%, and the content of the iron element in the copper-iron master alloy is 10 wt%.
Further, in both step S3 and step S5, a direct-reading spectrometer is used for element content analysis.
Further, in the step S4, when the liquid raw material needs to be supplemented with iron element, the liquid raw material is directly added into the medium frequency induction furnace in the form of Cu — Fe master alloy in the step S1.
Further, in the step S9, the casting temperature is 1200-1230 ℃, the casting speed is 60-80mm/min, and the cooling water flow rate in the crystallizer is 50-60m cultivation/h.
Further, the components and the mass percentage contents of the elements in the C19400 copper alloy ingot cast in the step S9 are as follows: fe: 2.1-2.6%, Zn: 0.05-0.20%, P: 0.015-0.15%, Cu not less than 97.0%, and the balance of inevitable impurities.
Compared with the prior art, the invention has the beneficial effects that:
1. the method adopts a small-capacity crucible furnace to melt the industrial pure iron independently, and then adds the pure iron melt into the medium-frequency induction furnace to be melted together with the copper element raw material, thereby avoiding the technical problem of long melting time caused by adding the solid industrial pure iron and the solid copper element raw material into the medium-frequency induction furnace simultaneously for melting, simultaneously overcoming the technical problems of incomplete iron melting and uneven distribution caused by the difference of melting points of the iron element raw material and the copper element raw material in the copper alloy, leading the iron element raw material to be distributed more uniformly in the copper element raw material, and providing good tissue preparation for subsequent machining;
2. when the iron element needs to be supplemented in the alloy solution, the Cu-Fe intermediate alloy is added, so that on one hand, the uniformity of the distribution of the iron element in the melt is ensured, on the other hand, the production efficiency is improved, and the production cost is not excessively increased;
in a word, the C19400 copper alloy cast ingot prepared by the preparation process provided by the invention has stable iron element content and uniform structure, effectively controls the phenomenon of iron element enrichment and unevenness, greatly reduces the appearance of peeling and slag falling caused by uneven iron on the surface of a strip in the subsequent rolling process, and avoids the phenomenon of strip holes. Meanwhile, as the crucible furnace is adopted to melt the industrial pure iron independently, the time for smelting the C19400 copper alloy raw material is shortened, the production efficiency is improved, and the raw material cost is not increased basically.
Drawings
FIG. 1 is a microstructure of a C19400 copper alloy ingot made according to the prior art;
FIG. 2 is a microstructure of a C19400 copper alloy ingot made according to example 1;
FIG. 3 is a microstructure of a C19400 copper alloy ingot made according to example 2;
FIG. 4 is a microstructure of a C19400 copper alloy ingot made according to example 3;
FIG. 5 is a topographical view of a strip made from the C19400 copper alloy ingot made in example 3.
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.
In the specific embodiment, the technical requirements for preparing the copper alloy ingot by the casting process are as follows:
alloy designation: a C19400 copper alloy;
specification of ingot casting: thickness 210 mm, width 420 mm, length 8250 mm;
chemical components and contents (the contents are not particularly specified in the invention and are all understood to be the contents in percentage by mass): fe: 2.1-2.6%, Zn: 0.05-0.20%, P: 0.015-0.15%, Cu not less than 97.0%, and the balance of inevitable impurities.
Example 1
A preparation process for homogenizing a C19400 copper alloy cast ingot structure comprises the following steps:
s1, preparing 3500Kg of standard electrolytic copper, 80.5Kg of industrial pure iron, 3.5Kg of zinc ingot, 35Kg of copper-phosphorus master alloy (phosphorus content is 10%) and 3000Kg of C19400 copper alloy leftover materials according to the raw materials and the mass percentage content thereof;
s2, smelting raw materials:
firstly, adding standard electrolytic copper and C19400 copper alloy leftover materials into a medium-frequency induction furnace, setting the heating temperature of the medium-frequency induction furnace to be 1100 ℃, and heating the medium-frequency induction furnace until a filler is in a completely molten liquid state; meanwhile, adding the industrial pure iron into a crucible furnace, setting the heating temperature of the crucible furnace to 1600 ℃, and heating the crucible furnace until the industrial pure iron is completely melted into molten iron; secondly, adding molten iron into a medium-frequency induction furnace, and uniformly stirring the mixed filler in the medium-frequency induction furnace; thirdly, adding the zinc ingot and the copper-phosphorus intermediate alloy into the medium-frequency induction furnace until all the raw materials are completely melted to be in a liquid state; finally, covering the liquid level of the melting raw materials in the medium-frequency induction furnace with red charcoal powder, wherein the thickness of the covering layer is 150 mm;
s3, first element content analysis: the first elemental content analysis was performed on the completely melted liquid raw material in step S2, and the result was: fe: 2.23%, Zn: 0.096%, P: 0.035%, Cu: 97.24 percent and 0.399 percent of inevitable impurities;
s4, adjusting components: comparing the result of the first element content analysis in step S3 with the content of each element set in the finished product, wherein the content of each element meets the set technical requirements, so in this example 1, the content of the element in the liquid raw material does not need to be adjusted, and the liquid raw material is directly prepared to enter the converter process;
s5, converter: setting the temperature of the converter to 1200 ℃, and transferring the liquid raw material in the medium-frequency induction furnace to a holding furnace;
s6, analyzing the content of elements for the second time: the liquid raw material in the holding furnace is subjected to all-component analysis (namely stokehole analysis) of each element, and the result is as follows: fe: 2.25%, Zn: 0.098%, P: 0.012%, Cu: 97.33%, the balance being unavoidable impurities; the content of the P element does not meet the set technical requirement, so 25Kg of copper-phosphorus master alloy is added according to the requirement, and then the element components are analyzed until the content of each component in the liquid raw material meets the set requirement of each element content in the finished product;
s7, maintaining the temperature of a holding furnace and standing: keeping the temperature at 1200 ℃, and keeping the temperature and standing for 30 minutes;
s8, casting: and pouring the liquid raw material subjected to heat preservation and standing in the step S7 into a mould for casting, wherein the casting temperature is 1200 ℃, the casting speed is 60mm/min, and the cooling water flow in the crystallizer is 50m for carrying out heavy planting/h.
And the steps S3 and S6 adopt a direct-reading spectrometer to carry out element content analysis.
As shown in fig. 2, the C19400 ingot prepared according to this example 1 has stable iron content and uniform structure, and no iron enrichment and non-uniformity; in the subsequent rolling process, the phenomena of peeling and holes caused by uneven iron on the surface of the strip are not generated. As shown in figure 1, a C19400 copper alloy cast ingot prepared in the prior art is very easy to produce a pig iron element enrichment zone, and a plurality of holes are randomly distributed in the cast ingot, so that the quality of the cast ingot is directly influenced.
Example 2
A preparation process for homogenizing a C19400 copper alloy cast ingot structure comprises the following steps:
s1, preparing 2500Kg of standard electrolytic copper, 56Kg of industrial pure iron, 2.5Kg of zinc ingot, 25Kg of copper-phosphorus master alloy and 4000Kg of C19400 copper alloy leftover materials according to the raw materials and the mass percentage content thereof;
s2, smelting raw materials:
firstly, adding standard electrolytic copper and C19400 copper alloy leftover materials into a medium-frequency induction furnace, setting the heating temperature of the medium-frequency induction furnace to 1150 ℃, and heating the medium-frequency induction furnace until a filler is in an incompletely molten solid-liquid mixed state; meanwhile, adding the industrial pure iron into a crucible furnace, setting the heating temperature of the crucible furnace to be 1630 ℃, and heating the crucible furnace until the industrial pure iron is completely melted into molten iron; secondly, adding molten iron into a medium-frequency induction furnace, and uniformly stirring the mixed filler in the medium-frequency induction furnace; thirdly, adding the zinc ingot and the copper-phosphorus intermediate alloy into the medium-frequency induction furnace until all the raw materials are completely melted to be in a liquid state; finally, covering the liquid level of the melting raw materials in the medium-frequency induction furnace with red charcoal powder, wherein the thickness of the covering layer is 200 mm;
s3, first element content analysis: the first elemental content analysis was performed on the completely melted liquid raw material in step S2, and the result was: fe: 2.30%, Zn: 0.086%, P: 0.046%, Cu 97.26%, and 0.308% of inevitable impurities;
s4, adjusting components: comparing the result of the first element content analysis in step S3 with the content of each element set in the finished product, wherein the content of each element meets the set technical requirements, so in this embodiment 2, the content of the element in the liquid raw material does not need to be adjusted, and the liquid raw material is directly prepared to enter the converter process;
s5, converter: the temperature of the converter is set to 1240 ℃, and the liquid raw material in the medium-frequency induction furnace is transferred to a holding furnace;
s6, analyzing the content of elements for the second time: the liquid raw material in the holding furnace is subjected to all-component analysis (namely stokehole analysis) of each element, and the result is as follows: fe: 2.21%, Zn: 0.073%, P: 0.044%, Cu: 97.31 percent and 0.363 percent of inevitable impurities, and the content of each element meets the set technical requirement without adjustment;
s7, maintaining the temperature of a holding furnace and standing: keeping the temperature at 1220 ℃, and keeping the temperature and standing for 40 minutes;
s8, casting: and pouring the liquid raw material subjected to heat preservation and standing in the step S7 into a mould to start casting, wherein the casting temperature is 1220 ℃, the casting speed is 70mm/min, and the cooling water flow in the crystallizer is 55m for carrying out thin film planting/h.
And in the step S3 and the step S6, a direct-reading spectrometer is adopted for element content analysis.
As shown in fig. 3, the C19400 ingot prepared according to this example 2 has stable iron content and uniform structure, and no iron enrichment and non-uniformity; in the subsequent rolling process, the phenomena of peeling and holes caused by uneven iron on the surface of the strip are not generated.
Example 3
A preparation process for homogenizing a C19400 copper alloy cast ingot structure comprises the following steps:
s1, preparing 5000Kg of standard electrolytic copper, 115Kg of industrial pure iron, 5Kg of zinc ingot, 50Kg of copper-phosphorus master alloy and 1500Kg of C19400 copper alloy leftover materials according to the raw materials and the mass percentage content thereof;
s2, smelting raw materials:
firstly, adding standard electrolytic copper and C19400 copper alloy leftover materials into a medium-frequency induction furnace, setting the heating temperature of the medium-frequency induction furnace to 1200 ℃, and heating the medium-frequency induction furnace until a filler is in an incompletely molten solid-liquid mixed state; meanwhile, adding the industrial pure iron into a crucible furnace, setting the heating temperature of the crucible furnace to 1650 ℃, and heating the crucible furnace until the industrial pure iron is completely melted into molten iron; secondly, adding molten iron into a medium-frequency induction furnace, and uniformly stirring the mixed filler in the medium-frequency induction furnace; thirdly, adding the zinc ingot and the copper-phosphorus intermediate alloy into the medium-frequency induction furnace until all the raw materials are completely melted to be in a liquid state; finally, covering the liquid level of the raw materials melted in the medium-frequency induction furnace with red charcoal powder, wherein the thickness of the covering layer is 220 mm;
s3, first element content analysis: the first elemental content analysis was performed on the completely melted liquid raw material in step S2, and the result was: fe: 2.07%, Zn: 0.061%, P: 0.045%, Cu: 97.50 percent, and the balance of inevitable impurities;
s4, adjusting components: comparing the result of the first element content analysis in the step S3 with the content of each element set in the finished product, and showing that the content of the Fe element does not meet the set technical requirements, the Fe element is supplemented into the liquid raw material according to the requirement, namely 90Kg of Cu-Fe intermediate alloy (Fe content is 10%) is directly added into the medium-frequency induction furnace in the step S1, and the Cu-Fe intermediate alloy is fully melted and uniformly stirred;
s5, analyzing the content of elements for the second time: performing element content analysis on the raw material with the components adjusted in the step S4 for the second time, wherein the element content meets the set technical requirements and is ready to enter the converter process;
s6, converter: setting the temperature of the converter to 1260 ℃, and transferring the liquid raw material in the medium-frequency induction furnace to a holding furnace;
s7, maintaining the temperature of a holding furnace and standing: keeping the temperature at 1230 ℃, and keeping the temperature and standing for 50 minutes;
s8, analyzing the content of the third element: the liquid raw material in the holding furnace is subjected to all-component analysis (namely stokehole analysis) of each element, and the result is as follows: fe: 2.19%, Zn: 0.043%, P: 0.040%, Cu: 97.39%, the balance being unavoidable impurities; the content of Zn element can not meet the set technical requirement, so that 1.7Kg of raw material zinc ingot is added according to the requirement, and then the element components are analyzed until the content of each component in the liquid raw material meets the set content requirement of each element in the finished product;
s9, casting: and step S8, pouring the liquid raw material into a mold to start casting after the third-time element content analysis is qualified, wherein the casting temperature is 1230 ℃, the casting speed is 80mm/min, and the cooling water flow in the crystallizer is 60m cultivation/h.
And in the step S3, the step S5 and the step S8, a direct-reading spectrometer is adopted for element content analysis.
As shown in fig. 4, the C19400 ingot prepared according to this example 3 has stable iron content and uniform structure, and no iron enrichment and non-uniformity; as shown in fig. 5, no peeling and voids occurred on the surface of the strip due to non-uniformity of iron during the subsequent rolling process.
The above description is only for the specific embodiments of the present invention, but the scope of the present invention is not limited thereto, and any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope of the present invention are included in the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the appended claims.
Claims (6)
1. A preparation process for homogenizing a C19400 copper alloy cast ingot structure is characterized by comprising the following steps:
s1, preparing standard electrolytic copper, industrial pure iron, zinc ingots, copper-phosphorus master alloy and C19400 copper alloy leftover materials according to the raw materials and the mass percentage content thereof;
s2, smelting raw materials:
firstly, adding standard electrolytic copper and C19400 copper alloy leftover materials into a medium-frequency induction furnace, setting the heating temperature of the medium-frequency induction furnace at 1100-1200 ℃, and heating the medium-frequency induction furnace until a filler is in a completely molten liquid state or an incompletely molten solid-liquid mixed state; meanwhile, adding the industrial pure iron into the crucible furnace, setting the heating temperature of the crucible furnace to 1600-; secondly, adding molten iron into a medium-frequency induction furnace, and uniformly stirring the mixed filler in the medium-frequency induction furnace; thirdly, adding the zinc ingot and the copper-phosphorus intermediate alloy into the medium-frequency induction furnace until all the raw materials are completely melted to be in a liquid state; finally, covering the liquid level of the raw material melted in the medium-frequency induction furnace with red charcoal powder;
s3, first element content analysis: performing a first elemental content analysis on the completely melted liquid raw material of step S2;
s4, adjusting components: comparing the result of the first element content analysis in the step S3 with the content of each element set in the finished product, and adjusting the content of the elements in the liquid raw material;
s5, analyzing the content of elements for the second time: performing element content analysis on the raw material with the components adjusted in the step S4 for the second time, and preparing to enter a converter process after the element content meets the set requirement;
s6, converter: setting the temperature of the converter to 1200 and 1260 ℃, and transferring the liquid raw material in the medium-frequency induction furnace to a heat preservation furnace;
s7, analyzing the content of the third element: performing full component analysis on each element on the liquid raw material in the heat preservation furnace, adjusting the content of each element according to the requirement, and analyzing again until the content of each element in the liquid raw material meets the requirement of the content of each element set in the finished product;
s8, maintaining the temperature of a holding furnace and standing: the heat preservation temperature is 1200-1230 ℃, and the mixture is kept standing for 30-50 minutes;
s9, casting: the liquid raw material after the heat preservation and standing in the step S8 is poured into a mold to start casting.
2. The process of claim 1, wherein the step of homogenizing the structure of the C19400 copper alloy ingot comprises the following steps: in the step S1, the content of the phosphorus element in the copper-phosphorus master alloy is 10wt%, and the content of the iron element in the copper-iron master alloy is 10 wt%.
3. The process of claim 1, wherein the step of homogenizing the structure of the C19400 copper alloy ingot comprises the following steps: and in the step S3 and the step S5, a direct-reading spectrometer is adopted for element content analysis.
4. The process of claim 1, wherein the step of homogenizing the structure of the C19400 copper alloy ingot comprises the following steps: in the step S4, when the liquid raw material needs to be supplemented with iron element, the liquid raw material is directly added into the medium frequency induction furnace in the form of Cu-Fe master alloy in the step S1.
5. The process of claim 1, wherein the step of homogenizing the structure of the C19400 copper alloy ingot comprises the following steps: in the step S9, the casting temperature is 1200-1230 ℃, the casting speed is 60-80mm/min, and the cooling water flow rate in the crystallizer is 50-60m for cultivating trees/h.
6. The process of claim 1, wherein the step of homogenizing the structure of the C19400 copper alloy ingot comprises the following steps: the C19400 copper alloy cast ingot prepared by casting in the step S9 comprises the following elements in percentage by mass: fe: 2.1-2.6%, Zn: 0.05-0.20%, P: 0.015-0.15%, Cu not less than 97.0%, and the balance of inevitable impurities.
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN1932056A (en) * | 2006-09-27 | 2007-03-21 | 苏州有色金属加工研究院 | High temperature copper alloy for lead frame and its making process |
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| CN111471880A (en) * | 2020-04-28 | 2020-07-31 | 太原晋西春雷铜业有限公司 | Ingot casting preparation method for reducing Cu-Ni-Si-Mg alloy casting slag inclusion |
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Inventor after: Zhang Wenqin Inventor after: Guo Yuhui Inventor after: Wang Shaohua Inventor after: Han Caixiang Inventor after: Jing Jie Inventor after: Wang Qi Inventor after: Wang Manfeng Inventor before: Zhang Wenqin Inventor before: Wang Shaohua Inventor before: Han Caixiang Inventor before: Jing Jie Inventor before: Wang Qi Inventor before: Wang Manfeng |
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Application publication date: 20210820 |