CN109175315A - A kind of preparation method of copper and iron immiscible alloy - Google Patents
A kind of preparation method of copper and iron immiscible alloy Download PDFInfo
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- CN109175315A CN109175315A CN201811130508.8A CN201811130508A CN109175315A CN 109175315 A CN109175315 A CN 109175315A CN 201811130508 A CN201811130508 A CN 201811130508A CN 109175315 A CN109175315 A CN 109175315A
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- copper
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
- B22D27/00—Treating the metal in the mould while it is molten or ductile ; Pressure or vacuum casting
- B22D27/02—Use of electric or magnetic effects
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- 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
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- Chemical & Material Sciences (AREA)
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Abstract
A kind of preparation method of copper and iron immiscible alloy, belong to immiscible alloy technical field, it is characterized in that implementation steps are as follows: one, boron nitride crucible being placed in the vacuum chamber of Efco-Northrup furnace, the copper and iron sample piece that mass ratio is 85:15 is put into boron nitride crucible, boron nitride crucible is connect with molybdenum electrode；Vacuum chamber is evacuated to 2 × 10‑4 Pa.High-frequency induction heating power is opened, is heated to 1400 DEG C, melts copper and iron sample piece all, keeps the temperature 10min；Two, electric pulse, action time 10min are applied to the copper and iron sample piece after heat preservation；Three, high-frequency induction heating power is closed, into furnace cooling process, after copper and iron sample piece melt solidifies completely, closes the pulse power.Advantage is that the immiscible alloy of the method for the present invention preparation can obtain the copper and iron difficulty consolute alloy of even tissue, crystal grain refinement.
Description
Technical field
The invention belongs to immiscible alloy technical fields, and in particular to a kind of preparation method of copper and iron difficulty consolute alloy.
Background technique
Serious segregation even organizational hierarchy easily occurs under the conditions of routine casting for immiscible alloy, so that it be made to lose
Application value.So being only distributed in the second phase even dispersion the two-phase in matrix or in symbiotic tissues is in threadiness
The excellent performance of ordered arrangement, immiscible alloy can emerge from.Therefore, weight of the preparation of immiscible alloy by people
Depending on.
Research in terms of thering are many scholars to do directional solidification to immiscible alloy under the conditions of space microgravity.Although adopting
It is the method for ideal research immiscible alloy liquid phase separation mechanism with space microgravity method, but higher cost input
It is widely applied can not.
However, immiscible alloy can only be weakened to a certain extent in liquid phase by the means of stimulated microgravity merely
Stokes movement in separation process, can not thoroughly eliminate its influence being roughened to the second phase drop, meanwhile, Marangoni
Migration still plays a leading role in the coarsening process of the second phase drop, and therefore, above-mentioned conventional method is still unable to get fine and closely woven
Immiscible alloy solidified structure.
Metallurgical powder method is smaller using the drop size that atomization obtains, to largely weaken in rapid solidification process
The component segregation of generation, therefore effectively prevent the generation of gross segregation in finished product.Due in alloy melt two constituent elements it is molten
Point difference is larger, therefore the preparation process of powder metallurgic method belongs to liquid-phase sintering.Its major advantage is the second phase volume point
Number is higher, gross segregation is smaller, while can also add other alloying elements；However, its disadvantage is also very prominent, such as production cost
High, complex procedures.
Summary of the invention
The object of the present invention is to provide a kind of preparation methods of copper and iron difficulty consolute alloy, can deposit efficiently against the prior art
The shortcomings that.
The object of the present invention is achieved like this, it is characterized in that implementation steps are as follows:
Step 1: boron nitride crucible is placed in the vacuum chamber of CW-30P type high-frequency induction furnace, then by mass ratio it is 85:
15 copper and iron sample piece are put into boron nitride crucible, and boron nitride crucible is connect with molybdenum electrode, by GW-30P type high-frequency induction furnace
Vacuum chamber in be evacuated to 2 × 10-4 Pa opens high-frequency induction heating power, carries out being heated to 1400 to copper and iron sample piece
DEG C, it melts copper and iron sample piece all, keeps the temperature 10min.
Second step applies electric pulse, action time 10min to the copper and iron exemplar product after heat preservation.Starting impulse electricity first
Source；Then adjusting pulse power output voltage is 60V, and 10 μ s of pulsewidth, frequency 30Hz, pulse current is by adjusting output electricity
The peak value that shows on oscillograph is pressed in realize.
Step 3: closing high-frequency induction heating power, into furnace cooling process, after melt solidifies completely, arteries and veins is closed
Rush power supply.
The positive effect of the present invention is: (1) electric pulse application makes have the critical shape of the immiscible alloy in liquid phase immiscibility area
Nuclear radius reduces, and nucleating potential barrier reduces, and degree of supercooling increases, and nucleation rate improves.
(2) since the method for applying pulse current is to focus on the research of pulse parameter, its introducing can also make alloy molten
Body obtains the degree of supercooling generated by electromagnetic force；Furthermore electric pulse reduces the activity of alloy melt, in melt by immiscible range
When, the atomic group number that the separation of the second phase occurs is substantially reduced, and the solidification of the second phase is simultaneously effectively suppressed, therefore monotectic can
With the increase of degree of supercooling as other conventional alloys, tissue is refined, and the final pulse current that applies can reach refinement
The purpose of immiscible alloy solidified structure.
Detailed description of the invention
Fig. 1 is apparatus of the present invention schematic diagram；
In figure: 1- oscillograph, the 2- pulse power, 3- argon gas, 4- molybdenum electrode, 5- copper and iron sample piece, 6- boron nitride crucible, 7- vacuum
Cabinet, 8- induction coil, 9- infrared measurement of temperature hole, 10- high-frequency induction heating power；
Fig. 2 is the solidified structure for not applying the Cu-15 wt.%Fe hypermonotectic alloy under electric pulse；
Fig. 3 is the solidified structure of Cu-15 wt.%Fe alloy under 500A pulse current；
Fig. 4 is the solidified structure of Cu-15 wt.%Fe alloy under 1000A pulse current.
Specific embodiment
As shown in Figure 1, the preparation method that the present invention prepares copper and iron difficulty consolute alloy is:
Step 1: boron nitride crucible 6 is placed in the vacuum chamber 7 of CW-30P type high-frequency induction furnace, then by mass ratio
It is put into boron nitride crucible 6 for 85:15 copper and iron sample piece 5, boron nitride crucible 6 is connect with molybdenum electrode 4, by GW-30P type high frequency sense
The vacuum chamber 7 of heating furnace is answered to be evacuated to 2 × 10-4 Pa opens high-frequency induction heating power 10, adds to copper and iron sample
Heat melts copper and iron sample piece 5 all to 1400 DEG C, keeps the temperature 10min；
Second step, to after heat preservation copper and iron sample piece 5 apply electric pulse, action time 10min, first starting impulse power supply 2,
Then adjusting 2 output voltage of the pulse power is 60V, and 10 μ s of pulsewidth, frequency 30Hz, pulse current is by adjusting output voltage
The peak value that shows on oscillograph 1 realizes,
Step 3: closing high-frequency induction heating power 10, closed after copper and iron sample piece 5 completely solidification into furnace cooling process
Close the pulse power 2.
Fig. 2 is the solidified structure for not applying the Cu-15 wt.%Fe hypermonotectic alloy under electric pulse；
Fig. 3 is the solidified structure of Cu-15 wt.%Fe alloy under 500A pulse current；
Fig. 4 is the solidified structure of Cu-15 wt.%Fe alloy under 1000A pulse current.
Comparison causes microstructure segregation serious as it can be seen that Fe-riched phase aggregation in Fig. 2；
Rich iron ball disappears in Fig. 3 solidified structure, and intra-die is grown according to branch crystal type, obtains more uniform tissue.
Dendrite disappears in Fig. 4, obtains more uniform tissue, crystal grain is obviously refined.
Claims (1)
1. a kind of preparation method of copper and iron immiscible alloy, it is characterised in that implementation steps are as follows:
Step 1: boron nitride crucible (6) is placed in the vacuum chamber (7) of CW-30P type high-frequency induction furnace, then by matter
Than being that 85:15 copper and iron sample piece (5) is put into boron nitride crucible (6), boron nitride crucible (6) is connect amount with molybdenum electrode (4), will
The vacuum chamber (7) of GW-30P type high-frequency induction furnace is evacuated to 2 × 10-4 Pa opens high-frequency induction heating power
(10), copper and iron sample is carried out being heated to 1400 DEG C, melts copper and iron sample piece (5) all, keep the temperature 10min；
Second step applies electric pulse, action time 10min, first starting impulse power supply to the copper and iron sample piece (5) after heat preservation
(2), then adjusting the pulse power (2) output voltage is 60V, and 10 μ s of pulsewidth, frequency 30Hz, pulse current is by adjusting defeated
Voltage is shown on oscillograph (1) out peak value realizes,
Step 3: closing high-frequency induction heating power (10), into furnace cooling process, solidified completely to copper and iron sample piece (5)
Afterwards, the pulse power (2) are closed.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201811130508.8A CN109175315B (en) | 2018-09-27 | 2018-09-27 | Preparation method of copper-iron immiscible alloy |
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| CN201811130508.8A CN109175315B (en) | 2018-09-27 | 2018-09-27 | Preparation method of copper-iron immiscible alloy |
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| CN109175315A true CN109175315A (en) | 2019-01-11 |
| CN109175315B CN109175315B (en) | 2021-01-19 |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110724841A (en) * | 2019-11-07 | 2020-01-24 | 中南大学 | Preparation method of immiscible alloy and continuous casting equipment |
| CN110814305A (en) * | 2019-11-07 | 2020-02-21 | 中南大学 | Cu-Fe composite material double-melt mixed casting equipment and process |
| CN115261653A (en) * | 2022-08-12 | 2022-11-01 | 山西工程职业学院 | Preparation method of modified ZL102 aluminum alloy |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110724841A (en) * | 2019-11-07 | 2020-01-24 | 中南大学 | Preparation method of immiscible alloy and continuous casting equipment |
| CN110814305A (en) * | 2019-11-07 | 2020-02-21 | 中南大学 | Cu-Fe composite material double-melt mixed casting equipment and process |
| CN110814305B (en) * | 2019-11-07 | 2021-06-15 | 中南大学 | Cu-Fe composite material double-melt mixed casting equipment and process |
| CN115261653A (en) * | 2022-08-12 | 2022-11-01 | 山西工程职业学院 | Preparation method of modified ZL102 aluminum alloy |
| CN115261653B (en) * | 2022-08-12 | 2023-11-10 | 山西工程职业学院 | Preparation method of modified ZL102 aluminum alloy |
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Inventor after: Hao Weixin Inventor after: Sun Xiaosi Inventor after: Li Yugui Inventor after: Geng Guihong Inventor after: Hao Xi Inventor before: Hao Weixin Inventor before: Li Yugui Inventor before: Geng Guihong Inventor before: Hao Xi |
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Effective date of registration: 20201225 Address after: 030024 No. 66 tile Road, Wan Berlin District, Shanxi, Taiyuan Applicant after: TAIYUAN University OF SCIENCE AND TECHNOLOGY Applicant after: Shanxi Engineering Vocational College Address before: 030024 No. 66 tile Road, Wan Berlin District, Shanxi, Taiyuan Applicant before: TAIYUAN University OF SCIENCE AND TECHNOLOGY |
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