A kind of gold base alloy electrical contact material and preparation method thereof
A technology of electrical contact material and gold-based alloy, which is applied in the field of electrical contact, can solve the problems that cannot meet the application requirements of brush materials for precision potentiometers, and achieve the effects of high yield, low noise, and small contact resistance
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Embodiment 1
[0023] The rare earth-doped gold-based alloy ribbon was prepared according to the following steps:
[0024] (1) Melting
[0025] Vacuum the melting chamber, according to the composition of Ag: 21%, Ni: 2.5%, Cu: 2%, Sm: 0.01%, and the balance is Au, first melt the Au-Ag-Ni-Cu alloy in a vacuum induction intermediate frequency furnace After the metal is completely melted, reduce the current and add Sm to the melt through the hopper, and finally refine and degas in the molten state to increase the density of the ingot.
[0026] (2) Casting and molding to prepare alloy ingots;
[0027] (3) Rolling, rolling heat treatment
[0028] The alloy ingot obtained in the cold rolling step (2) is adopted, and vacuum annealing is carried out when the processing rate reaches 70% during the rolling process, the temperature is 500° C., and the time is 30 minutes.
[0029] (4) Heat treatment of strip finished product
[0030] The vacuum annealing treatment temperature of the finished product...
Embodiment 2
[0033] Rare earth-doped gold-based alloy wires were prepared according to the following steps:
[0034] (1) Melting
[0035] Vacuum the melting chamber, according to the composition of Ag: 23%, Ni: 3.5%, Cu: 1.0%, Sm: 0.2%, and the balance is Au, first melt the Au-Ag-Ni-Cu alloy in a vacuum induction intermediate frequency furnace After the metal is completely melted, reduce the current and add Sm to the melt through the hopper, and carry out refining and degassing in the molten state to increase the density of the ingot.
[0036] (2) Casting and molding to prepare alloy ingots;
[0037] (3) Rolling, rolling heat treatment
[0038] The alloy ingot obtained in the cold rolling step (2) is adopted, and the vacuum annealing treatment is carried out for 20-50 minutes when the processing rate reaches 70-90% during the rolling process.
[0039] (4) drawing, drawing heat treatment
[0040] Use a wire drawing machine for wire drawing, and when the processing rate reaches 50% in th...
Embodiment 3
[0045] The rare earth-doped gold-based alloy ribbon was prepared according to the following steps:
[0046] (1) Melting
[0047] Vacuum the melting chamber, according to the composition of Ag: 25%, Ni: 3.5%, Cu: 3%, Sm: 0.3%, and the balance of Au, first melt the Au-Ag-Ni-Cu alloy in a vacuum induction intermediate frequency furnace, After the metal is completely melted, reduce the current and add Sm to the melt through the hopper, and carry out refining and degassing in the molten state to increase the density of the ingot.
[0048] (2) Casting and molding to prepare alloy ingots;
[0049] (3) Rolling, rolling heat treatment
[0050] The alloy ingot obtained in the cold rolling step (2) is adopted, and vacuum annealing is carried out when the processing rate reaches 90% during the rolling process, the temperature is 500° C., and the time is 50 minutes.
[0051] (4) Heat treatment of strip finished product
[0052] The heat treatment of the finished strip is vacuum anneali...
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Abstract
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