Method for preparing tin-copper alloy pole piece by using alloy powder
A technology of tin-copper alloy and alloy powder, which is applied in the field of preparation of tin-copper alloy pole pieces, can solve the problems of poor surface performance and low quality of tin-copper alloy, and achieves high performance, uniform particle size, and improved electrochemical performance. Effect
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Embodiment 1
[0025] Bulk Cu 5 sn 6 melted, and then the molten Cu 5 sn 6 The fluid is sprayed vertically through the nozzle to the surface of the rotating roller with grooves; the opening diameter of the groove on the roller surface is 0.5 mm, the mass flow rate of the fluid injection is 6g / s, and the vertical distance between the nozzle and the roller is 0.01mm 1. The diameter of the roller is 40mm, and the rotation speed of the roller is 300r / min; then the powder in the atomization chamber is collected, and the diameters of all particle sizes are analyzed to be between 15-23μm, and the powder is pressed into a 50μm thick tin-copper alloy foil; Then put the foil in the furnace for sintering. During the sintering, a mixed gas of argon and air with a flow rate of 20mL / min is introduced, wherein the volume ratio of argon to air is preferably 5:1, and the temperature is raised at 25°C / min. The rate was raised from room temperature to 400°C, and then kept at a temperature of 24 hours, and t...
Embodiment 2
[0027] Bulk Cu 5 sn 6 melted, and then the molten Cu 5 sn 6 The fluid is sprayed vertically through the nozzle to the surface of the rotating roller with grooves; the opening diameter of the groove on the roller surface is 0.7 mm, the mass flow rate of the fluid injection is 7g / s, and the vertical distance between the nozzle and the roller is 0.05mm 1. The diameter of the roller is 45mm, and the rotation speed of the roller is 320r / min; then the powder in the atomization chamber is collected, and the diameters of all particle sizes are analyzed to be between 11-18 μm, and the powder is pressed into a 50 μm thick tin-copper alloy foil; Then place the foil in a furnace for sintering. During sintering, a mixed gas of argon and air with a volume ratio of 6:1 is introduced, and the flow rate is 20mL / min, and the temperature rises from room temperature to 400°C at a rate of 25°C / min. , and then keep warm for 24h, and then naturally cool to room temperature, so as to obtain a tin-...
Embodiment 3
[0029] Bulk Cu 5 sn 6 melted, and then the molten Cu 5 sn 6 The fluid is sprayed vertically through the nozzle to the surface of the rotating roller with grooves; the opening diameter of the groove on the roller surface is 1.0 mm, the mass flow rate of the fluid injection is 8g / s, and the vertical distance between the nozzle and the roller is 0.1mm 1. The diameter of the roller is 42mm, and the rotation speed of the roller is 350r / min; then the powder in the atomization chamber is collected, and the diameters of all particle sizes are analyzed to be between 11-22μm, and the powder is pressed into a 55μm thick tin-copper alloy foil; Then place the foil in a furnace for sintering. During sintering, a mixture of argon and air with a volume ratio of 7:1 is introduced, and the flow rate is 20mL / min, and the temperature rises from room temperature to 400°C at a rate of 25°C / min. , and then keep warm for 24h, and then naturally cool to room temperature, so as to obtain a tin-coppe...
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Abstract
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