CN114540665A - Copper alloy with good bending performance and preparation method thereof - Google Patents
Copper alloy with good bending performance and preparation method thereof Download PDFInfo
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- CN114540665A CN114540665A CN202111334435.6A CN202111334435A CN114540665A CN 114540665 A CN114540665 A CN 114540665A CN 202111334435 A CN202111334435 A CN 202111334435A CN 114540665 A CN114540665 A CN 114540665A
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- 229910000881 Cu alloy Inorganic materials 0.000 title claims abstract description 36
- 238000005452 bending Methods 0.000 title claims abstract description 10
- 238000002360 preparation method Methods 0.000 title abstract description 7
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 claims abstract description 52
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims abstract description 33
- 239000010949 copper Substances 0.000 claims abstract description 33
- 229910052802 copper Inorganic materials 0.000 claims abstract description 32
- ATJFFYVFTNAWJD-UHFFFAOYSA-N Tin Chemical compound [Sn] ATJFFYVFTNAWJD-UHFFFAOYSA-N 0.000 claims abstract description 31
- 229910052710 silicon Inorganic materials 0.000 claims abstract description 28
- 239000010703 silicon Substances 0.000 claims abstract description 28
- 229910052759 nickel Inorganic materials 0.000 claims abstract description 26
- 238000003723 Smelting Methods 0.000 claims description 120
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims description 42
- 239000011133 lead Substances 0.000 claims description 30
- 239000011135 tin Substances 0.000 claims description 30
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 claims description 27
- 238000009750 centrifugal casting Methods 0.000 claims description 27
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 claims description 25
- 239000001301 oxygen Substances 0.000 claims description 25
- 229910052760 oxygen Inorganic materials 0.000 claims description 25
- 229910052757 nitrogen Inorganic materials 0.000 claims description 21
- 238000005266 casting Methods 0.000 claims description 19
- 238000007872 degassing Methods 0.000 claims description 15
- 238000007664 blowing Methods 0.000 claims description 14
- 238000000034 method Methods 0.000 claims description 9
- 238000003754 machining Methods 0.000 claims description 7
- 238000005488 sandblasting Methods 0.000 claims description 7
- 238000003756 stirring Methods 0.000 claims description 7
- 238000002844 melting Methods 0.000 claims description 3
- 230000008018 melting Effects 0.000 claims description 3
- 238000004519 manufacturing process Methods 0.000 claims description 2
- 229910045601 alloy Inorganic materials 0.000 description 6
- 239000000956 alloy Substances 0.000 description 6
- 239000007789 gas Substances 0.000 description 4
- 230000003247 decreasing effect Effects 0.000 description 3
- LQBJWKCYZGMFEV-UHFFFAOYSA-N lead tin Chemical compound [Sn].[Pb] LQBJWKCYZGMFEV-UHFFFAOYSA-N 0.000 description 3
- 239000000203 mixture Substances 0.000 description 3
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 description 2
- UTXHYEBRQQEWNM-UHFFFAOYSA-N [Pb].[Sn].[Si].[Cu] Chemical compound [Pb].[Sn].[Si].[Cu] UTXHYEBRQQEWNM-UHFFFAOYSA-N 0.000 description 2
- 239000003153 chemical reaction reagent Substances 0.000 description 2
- 238000001514 detection method Methods 0.000 description 2
- 239000001257 hydrogen Substances 0.000 description 2
- 229910052739 hydrogen Inorganic materials 0.000 description 2
- 239000011856 silicon-based particle Substances 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000003124 biologic agent Substances 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 230000007123 defense Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 239000000463 material Substances 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
- 238000004321 preservation Methods 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
Classifications
-
- 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
- C22C9/10—Alloys based on copper with silicon as the next major constituent
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
- B22D13/00—Centrifugal casting; Casting by using centrifugal force
-
- 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
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Manufacture And Refinement Of Metals (AREA)
- Continuous Casting (AREA)
Abstract
The application discloses a copper alloy with good bending performance and a preparation method thereof. The copper alloy comprises the following components in parts by weight: 0.5 to 1 part of tin, 2 to 5 parts of silicon, 0.6 to 0.8 part of nickel, 0.2 to 0.5 part of lead and 98 to 100 parts of copper. The copper alloy has yield strength of more than 950MPa, tensile strength of more than 850MPa, good bending performance and wider application range.
Description
Technical Field
The application relates to the field of alloys, in particular to a copper alloy with good bending performance and a preparation method thereof.
Background
Copper and copper alloy have the characteristics of high strength, excellent heat conduction and electric conductivity and easy processing, and are widely applied to the fields of aerospace, electronic communication, mechanical manufacturing, national defense and military industry and daily life; however, the poor flexibility of copper and copper alloys has greatly limited the industrial application of copper and copper alloys.
Disclosure of Invention
The application provides a copper alloy with good bending performance and a preparation method thereof, which can enable the copper alloy to have wider application.
The following technical scheme is adopted in the application:
the application provides a copper alloy with good bending performance, which comprises the following components in parts by weight: 0.5 to 1 part of tin, 2 to 5 parts of silicon, 0.6 to 0.8 part of nickel, 0.2 to 0.5 part of lead and 98 to 100 parts of copper.
The application also provides a preparation method of the copper alloy, which comprises the following steps: adding tin, lead, copper, silicon and nickel into a smelting furnace for smelting to obtain a smelting product. And (4) carrying out nitrogen blowing and degassing on the smelting product to obtain a refined product. And injecting the refined product into a centrifugal casting machine for casting to obtain a casting. And (4) performing lathe machining, boring and sand blasting on the casting to obtain the copper alloy.
Further, firstly adding tin and lead into a smelting furnace for smelting, then adding copper and silicon into the smelting furnace for smelting, and then adding nickel into the smelting furnace for smelting to obtain a smelting product.
Further, adding tin and lead into the furnace, controlling the temperature in the furnace to rise to 250-255 ℃ at a speed of 100-55 ℃/h and keeping the temperature for 1-1.5h under the stirring state, controlling the temperature in the furnace to rise to 350-355 ℃ at a speed of 50-55 ℃/h and keeping the temperature for 2-3h, and realizing the smelting of the tin and lead.
Further, when the temperature in the furnace is controlled to rise to 250-255 ℃ at the speed of 100-105 ℃/h and the temperature is kept for 1-1.5h, the oxygen content in the furnace is controlled to be 0.8-1%. The temperature in the furnace is controlled to rise to 350 ℃ and 355 ℃ at the speed of 50-55 ℃/h, the temperature is kept for 2-3h, and the oxygen content in the furnace is controlled to be 1.2-1.4%.
Further, after the tin and the lead are smelted, adding copper and silicon into the smelting furnace for smelting, then controlling the temperature in the smelting furnace to rise to 1440-1445 ℃ at the speed of 300-350 ℃/h, and preserving the temperature for 3-4h to realize the smelting of the copper and the silicon.
Further, when the temperature in the furnace is controlled to be increased to 1440-1445 ℃ at the speed of 300-350 ℃/h and the temperature is kept for 3-4h, the oxygen content in the furnace is controlled to be 0.6-0.7%.
Further, after the copper and the silicon are smelted, the temperature in the smelting furnace is controlled to be raised to 1480-1485 ℃, then the nickel is added into the smelting furnace, and the heat preservation is carried out for 1-1.5 hours, so that the smelting of the nickel is realized.
Furthermore, the pressure of nitrogen for nitrogen blowing and degassing is 32-35KPa, and the flow rate is 15-18L/min.
Further, after the refined product is injected into the centrifugal casting machine, the rotating speed of the centrifugal casting machine is controlled to be increased to 700-.
Compared with the prior art, the method has the following beneficial effects:
the copper alloy has yield strength of more than 950MPa, tensile strength of more than 850MPa, good bending performance and wider application range.
Detailed Description
It should be noted that the embodiments and features of the embodiments in the present application may be combined with each other without conflict. In the following examples, unless otherwise specified, the experimental methods used were all conventional methods, and materials, reagents and the like used were all available from biological or chemical reagents companies. The present application will be described in detail with reference to examples.
The embodiment of the application provides a copper alloy with good bending performance, which comprises the following components in parts by weight: 0.5 to 1 part of tin, 2 to 5 parts of silicon, 0.6 to 0.8 part of nickel, 0.2 to 0.5 part of lead and 98 to 100 parts of copper.
The embodiment of the application also provides a preparation method of the copper alloy, which comprises the following steps:
step one, adding tin, lead, copper, silicon and nickel into a smelting furnace for smelting to obtain a smelting product.
Firstly adding tin and lead into a smelting furnace for smelting, then adding copper and silicon into the smelting furnace for smelting, and then adding nickel into the smelting furnace for smelting to obtain a smelting product.
Adding tin and lead into a smelting furnace, controlling the temperature in the smelting furnace to rise to 250-class 255 ℃ at a speed of 100-55 ℃/h under the stirring state, and preserving heat for 1-1.5h, then controlling the temperature in the smelting furnace to rise to 350-class 355 ℃ at a speed of 50-55 ℃/h, and preserving heat for 2-3h, thereby realizing the smelting of the tin and the lead. The arrangement makes the tin melt first and wrap up the lead gradually, and after the tin melt and the lead are mixed uniformly, the lead starts to melt and is mixed with the tin gradually to obtain the tin-lead mixed melt.
Controlling the temperature in the furnace to rise to 250-255 ℃ at the speed of 100-105 ℃/h, and controlling the oxygen content in the furnace to be 0.8-1% when the temperature is kept for 1-1.5 h. The temperature in the furnace is controlled to rise to 350 ℃ and 355 ℃ at the speed of 50-55 ℃/h, the temperature is kept for 2-3h, and the oxygen content in the furnace is controlled to be 1.2-1.4%. The above arrangement realizes the control of the hydrogen content in the alloy and improves the performance of the copper alloy.
After the tin and the lead are smelted, adding copper and silicon into a smelting furnace for smelting, then controlling the temperature in the smelting furnace to rise to 1440-1445 ℃ at the speed of 300-350 ℃/h, and preserving the heat for 3-4h to realize the smelting of the copper and the silicon. According to the arrangement, part of copper and silicon particles are bonded into a block body through the tin-lead mixed melt, the block body is uniformly mixed with the rest of copper and silicon particles, then the copper and the silicon begin to melt, and are gradually mixed with the tin-lead mixed melt, so that the tin-lead-copper-silicon melt is obtained. In addition, tin and lead have weak affinity with gas, that is, the gas has low solubility in the melt, so that the performance of the alloy is not affected even if the alloy is melted for a long time.
The temperature in the furnace is controlled to be increased to 1440-1445 ℃ at the speed of 300-350 ℃/h, and the temperature is kept for 3-4h, the oxygen content in the furnace is controlled to be 0.6-0.7%. The above arrangement realizes the control of the hydrogen content in the alloy and improves the performance of the copper alloy.
After smelting copper and silicon, controlling the temperature in the smelting furnace to raise to 1480-1485 ℃, then adding nickel into the smelting furnace, and preserving the heat for 1-1.5 hours to realize the smelting of nickel. The above arrangement allows the nickel to be gradually mixed with the tin-lead-copper-silicon melt during the melting process. In addition, because the affinity of nickel and gas is large, the melting time is shortened, so that the gas content in the copper alloy is lower, and the performance of the copper alloy is improved.
And step two, nitrogen blowing and degassing are carried out on the smelting product to obtain a refined product.
The pressure of nitrogen for nitrogen blowing and degassing is 32-35KPa, and the flow rate is 15-18L/min. The above arrangement makes the degassing effect better, and improves the performance of the copper alloy.
And step three, injecting the refined product into a centrifugal casting machine for casting to obtain a casting.
After the refined product is injected into the centrifugal casting machine, the rotating speed of the centrifugal casting machine is controlled to be increased to 700-. The above arrangement allows casting to be completed gradually, while achieving gradual release of internal stress.
And step four, performing lathe machining, boring and sand blasting on the casting to obtain the copper alloy.
The technical solution of the present application will be described in detail with reference to specific examples.
Example 1
For each 1000g of the composition, 0.5 parts by weight of tin, 2 parts by weight of silicon, 0.6 parts by weight of nickel, 0.2 parts by weight of lead and 98 parts by weight of copper were prepared.
Firstly, adding tin and lead into a smelting furnace, controlling the temperature in the smelting furnace to rise to 250-DEG C at a speed of 100 ℃/h under the stirring state, preserving the temperature for 1h, controlling the oxygen content in the smelting furnace to be 0.8%, controlling the temperature in the smelting furnace to rise to 350 ℃ at a speed of 50 ℃/h, preserving the temperature for 2h, and controlling the oxygen content in the smelting furnace to be 1.2%. Then adding copper and silicon into the smelting furnace for smelting, controlling the temperature in the smelting furnace to increase to 1440 ℃ at the speed of 300 ℃/h, preserving the temperature for 3h, and simultaneously controlling the oxygen content in the smelting furnace to be 0.6%. And then controlling the temperature in the smelting furnace to rise to 1480 ℃, adding nickel into the smelting furnace, and keeping the temperature for 1 hour, and simultaneously keeping the oxygen content in the smelting furnace to be 0.6 percent unchanged to obtain a smelting product.
And (3) carrying out nitrogen blowing degassing on the smelting product, wherein the pressure of nitrogen for nitrogen blowing degassing is 32KPa, and the flow is 15L/min, so as to obtain a refined product.
Injecting the refined product into a centrifugal casting machine, controlling the rotating speed of the centrifugal casting machine to increase to 700 revolutions per minute at the speed of 100 revolutions per minute, then controlling the temperature of the centrifugal casting machine to decrease to 350 ℃ at the speed of 80 ℃/h, and then decreasing the temperature of the centrifugal casting machine to 50 ℃ at the speed of 40 ℃/h to obtain a casting.
And (4) performing lathe machining, boring and sand blasting on the casting to obtain the copper alloy.
The yield strength of the copper alloy is 985MPa and the tensile strength is 880 MPa.
Example 2
For each 1000g of the composition, 1 part by weight of tin, 5 parts by weight of silicon, 0.8 part by weight of nickel, 0.5 part by weight of lead and 100 parts by weight of copper were prepared.
Firstly, adding tin and lead into a smelting furnace, controlling the temperature in the smelting furnace to rise to 255 ℃ at a speed of 105 ℃/h under the stirring state, preserving the temperature for 1.5h, controlling the oxygen content in the smelting furnace to be 1%, then controlling the temperature in the smelting furnace to rise to 355 ℃ at a speed of 55 ℃/h, preserving the temperature for 3h, and controlling the oxygen content in the smelting furnace to be 1.4%. Then adding copper and silicon into a smelting furnace for smelting, controlling the temperature in the smelting furnace to rise to 1445 ℃ at the speed of 350 ℃/h, preserving the temperature for 4h, and controlling the oxygen content in the smelting furnace to be 0.7 percent. And then controlling the temperature in the smelting furnace to rise to 1485 ℃, then adding nickel into the smelting furnace, and keeping the temperature for 1.5 hours, and simultaneously keeping the oxygen content in the smelting furnace to be 0.7 percent unchanged to obtain a smelting product.
And (3) carrying out nitrogen blowing and degassing on the smelting product, wherein the pressure of nitrogen for nitrogen blowing and degassing is 35KPa, and the flow is 18L/min, so as to obtain a refined product.
Injecting the refined product into a centrifugal casting machine, controlling the rotating speed of the centrifugal casting machine to increase to 800 revolutions per minute at the speed of 120 revolutions per minute, then controlling the temperature of the centrifugal casting machine to decrease to 360 ℃ at the speed of 100 ℃/h, and then decreasing the temperature of the centrifugal casting machine to 60 ℃ at the speed of 50 ℃/h to obtain a casting.
And (4) performing lathe machining, boring and sand blasting on the casting to obtain the copper alloy.
The detection proves that the yield strength of the copper alloy is 1050MPa, and the tensile strength is 910 MPa.
Example 3
For each 1000g of the composition, 0.8 parts by weight of tin, 3 parts by weight of silicon, 0.7 parts by weight of nickel, 0.4 parts by weight of lead and 99 parts by weight of copper were prepared.
Adding tin and lead into a smelting furnace, controlling the temperature in the smelting furnace to rise to 253 ℃ at a speed of 102 ℃/h under the stirring state, preserving the temperature for 1.2h, controlling the oxygen content in the smelting furnace to be 0.9%, controlling the temperature in the smelting furnace to rise to 352 ℃ at a speed of 53 ℃/h, preserving the temperature for 2.5h, and controlling the oxygen content in the smelting furnace to be 1.3%. Then adding copper and silicon into the smelting furnace for smelting, controlling the temperature in the smelting furnace to rise to 1442 ℃ at a speed of 330 ℃/h, preserving the temperature for 3.5h, and controlling the oxygen content in the smelting furnace to be 0.6 percent. And then controlling the temperature in the smelting furnace to rise to 1483 ℃, then adding nickel into the smelting furnace, and keeping the temperature for 1.2 hours, and simultaneously keeping the oxygen content in the smelting furnace to be 0.6 percent unchanged to obtain a smelting product.
And (3) carrying out nitrogen blowing and degassing on the smelting product, wherein the pressure of nitrogen used for nitrogen blowing and degassing is 34KPa, and the flow is 17L/min, so as to obtain a refined product.
And injecting the refined product into a centrifugal casting machine, controlling the rotating speed of the centrifugal casting machine to be increased to 750 revolutions per minute at a speed of 110 revolutions per minute, then controlling the temperature of the centrifugal casting machine to be reduced to 355 ℃ at a speed of 90 ℃/h, and then reducing the temperature of the centrifugal casting machine to 55 ℃ at a speed of 45 ℃/h to obtain a casting.
And (4) performing lathe machining, boring and sand blasting on the casting to obtain the copper alloy.
The detection proves that the yield strength of the copper alloy is 1320MPa, and the tensile strength is 1010 MPa.
Example 4
For each 1000g of the alloy, 0.51 parts by weight of tin, 5 parts by weight of silicon, 0.8 part by weight of nickel, 0.2 part by weight of lead and 100 parts by weight of copper were prepared.
Firstly, adding tin and lead into a smelting furnace, controlling the temperature in the smelting furnace to rise to 250 ℃ at a speed of 105 ℃/h under the stirring state, preserving the temperature for 1.5h, controlling the oxygen content in the smelting furnace to be 0.8%, controlling the temperature in the smelting furnace to rise to 350 ℃ at a speed of 55 ℃/h, preserving the temperature for 3h, and controlling the oxygen content in the smelting furnace to be 1.2%. Then adding copper and silicon into the smelting furnace for smelting, controlling the temperature in the smelting furnace to increase to 1440 ℃ at the speed of 300 ℃/h, preserving the temperature for 4h, and simultaneously controlling the oxygen content in the smelting furnace to be 0.7%. And then controlling the temperature in the smelting furnace to rise to 1480 ℃, then adding nickel into the smelting furnace, and keeping the temperature for 1.5 hours, and simultaneously keeping the oxygen content in the smelting furnace to be 0.7 percent unchanged to obtain a smelting product.
And (3) carrying out nitrogen blowing and degassing on the smelting product, wherein the pressure of nitrogen used for nitrogen blowing and degassing is 32KPa, and the flow is 15L/min, so as to obtain a refined product.
Injecting the refined product into a centrifugal casting machine, controlling the rotating speed of the centrifugal casting machine to increase to 800 revolutions per minute at the speed of 100 revolutions per minute, then controlling the temperature of the centrifugal casting machine to decrease to 350 ℃ at the speed of 90 ℃/h, and then decreasing the temperature of the centrifugal casting machine to 60 ℃ at the speed of 50 ℃/h to obtain a casting.
And (4) performing lathe machining, boring and sand blasting on the casting to obtain the copper alloy.
The yield strength of the copper alloy is 1240MPa, and the tensile strength is 990 MPa.
Finally, it should be noted that: the above embodiments are only used for illustrating the technical solutions of the present application, and not for limiting the same; although the present application has been described in detail with reference to the foregoing embodiments, it should be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; and the modifications or the substitutions do not make the essence of the corresponding technical solutions depart from the scope of the technical solutions of the embodiments of the present application.
Claims (10)
1. The copper alloy with good bending property is characterized by comprising the following components in parts by weight: 0.5 to 1 part of tin, 2 to 5 parts of silicon, 0.6 to 0.8 part of nickel, 0.2 to 0.5 part of lead and 98 to 100 parts of copper.
2. A method for producing the copper alloy according to claim 1, comprising the steps of:
adding tin, lead, copper, silicon and nickel into a smelting furnace for smelting to obtain a smelting product;
nitrogen blowing and degassing are carried out on the smelting product to obtain a refined product;
injecting the refined product into a centrifugal casting machine for casting to obtain a casting;
and carrying out lathe machining, boring and sand blasting on the casting to obtain the copper alloy.
3. The method of producing a copper alloy according to claim 2,
firstly adding tin and lead into a smelting furnace for smelting, then adding copper and silicon into the smelting furnace for smelting, and then adding nickel into the smelting furnace for smelting to obtain the smelting product.
4. The method according to claim 3,
adding the tin and the lead into a smelting furnace, controlling the temperature in the smelting furnace to rise to 250-255 ℃ at a speed of 100-55 ℃/h under the stirring state, and preserving the heat for 1-1.5h, then controlling the temperature in the smelting furnace to rise to 350-355 ℃ at a speed of 50-55 ℃/h, and preserving the heat for 2-3h, thereby realizing the smelting of the tin and the lead.
5. The method according to claim 4,
controlling the temperature in the melting furnace to rise to 250-255 ℃ at the speed of 100-105 ℃/h, and controlling the oxygen content in the melting furnace to be 0.8-1% when the temperature is kept for 1-1.5 h; the temperature in the furnace is controlled to rise to 350-355 ℃ at the speed of 50-55 ℃/h, the temperature is kept for 2-3h, and the oxygen content in the furnace is controlled to be 1.2-1.4%.
6. The method according to claim 4,
after the tin and the lead are smelted, the copper and the silicon are added into a smelting furnace for smelting, then the temperature in the smelting furnace is controlled to be increased to 1440-1445 ℃ at the speed of 300-350 ℃/h, and the temperature is kept for 3-4h, so that the smelting of the copper and the silicon is realized.
7. The method according to claim 6,
controlling the temperature in the furnace to be 1440-1445 ℃ at the speed of 300-350 ℃/h, and controlling the oxygen content in the furnace to be 0.6-0.7% when the temperature is kept for 3-4 h.
8. The method according to claim 6,
after the copper and the silicon are smelted, controlling the temperature in the smelting furnace to rise to 1480-1485 ℃, then adding the nickel into the smelting furnace, and preserving the heat for 1-1.5 hours to realize the smelting of the nickel.
9. The method according to claim 2,
the pressure of nitrogen for nitrogen blowing and degassing is 32-35KPa, and the flow rate is 15-18L/min.
10. The method according to claim 2,
after the refined product is injected into a centrifugal casting machine, the rotating speed of the centrifugal casting machine is controlled to be increased to 700-800 revolutions per minute at the speed of 100-120 revolutions per minute, then the temperature of the centrifugal casting machine is controlled to be reduced to 350-360 ℃ at the speed of 80-100 ℃/h, and then the temperature of the centrifugal casting machine is reduced to 50-60 ℃ at the speed of 40-50 ℃/h, so that casting is realized.
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| CN104884651A (en) * | 2012-08-22 | 2015-09-02 | 宝世达瑞士金属股份公司 | Machinable copper alloys for electrical connectors |
| CN107690485A (en) * | 2016-10-25 | 2018-02-13 | 广东伟强铜业科技有限公司 | A kind of brass alloys and its manufacture method |
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