A kind of powdery active solder for diamond grinding tool
A technology of active solder and diamond, applied in the direction of grinding equipment, manufacturing tools, metal processing equipment, etc., can solve the problems of element segregation, solder plasticity deterioration, uneven structure, etc., and achieve low production cost and high wear resistance The effect of reducing and increasing hardness
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[0030] The preparation method of active powdery solder of the present invention comprises the following steps:
[0031] 1) Metal powder pre-dispersion: Add metal powders of copper, tin, aluminum, titanium, zinc, silicon and nickel to absolute ethanol, and mechanically stir and ultrasonically disperse the mixed solution of metal powder and absolute ethanol at the same time. During this process, the vibration frequency of the ultrasonic vibrator is 50~100Hz, and the action time is 30~500min.
[0032] 2) Wet ball milling: Transfer the mixed solution of pre-dispersed copper, tin, aluminum, titanium, zinc, silicon, nickel metal powder and absolute ethanol to the ball mill tank, adjust the amount of absolute ethanol so that all steel balls Submerge in absolute ethanol and perform ball milling. In this process, the ball-to-material ratio is between 3:1~30:1, the ball milling speed is 30~300r / min, and the ball milling time is 0.5~72 hours. The total amount of absolute ethanol added i...
Embodiment 1
[0037]Follow the specific steps described above. A mixed coarse powder containing 60wt% of copper powder, 15wt% of tin powder, 8wt% of aluminum powder, 7wt% of zinc powder, 7wt% of titanium powder and 3wt% of silicon powder is used. The average particle size of the mixed powder is selected at a particle size of about 200 meshes, and the purity of copper powder, tin powder, aluminum powder, zinc powder, titanium powder, and silicon powder is all 99.5%. In the pre-dispersion process, add 6g of copper powder, 1.5g of tin powder, 0.8g of aluminum powder, 0.7g of zinc powder, 0.7g of titanium powder, 0.3g of silicon powder, 20g of absolute ethanol, and the speed of the stirrer at 200r / min. The ultrasonic vibration frequency is 60 Hz, the action time is 200 min, and the solution temperature is room temperature 30°C. The ball-to-material ratio in the ball milling process is 10:1, the ball milling time is 24 hours, and the ball mill speed is 150r / min. The drying temperature is 100°C...
Embodiment 2
[0041] Follow the specific steps described above. A mixed coarse powder containing 55wt% of copper powder, 23wt% of tin powder, 7wt% of aluminum powder, 8wt% of zinc powder, 5wt% of titanium powder and 2wt% of silicon powder is used. The average particle size of the mixed powder is selected at a particle size of about 180 meshes, and the purity of copper powder, tin powder, aluminum powder, zinc powder, titanium powder, and silicon powder is all 99.5%. In the pre-dispersion process, add 5.5g of copper powder, 2.3g of tin powder, 0.7g of aluminum powder, 0.8g of zinc powder, 0.5g of titanium powder, 0.2g of silicon powder, 25g of absolute ethanol, and the speed of the stirrer at 250r / min , the ultrasonic vibration frequency is 100Hz, the action time is 250min, and the solution temperature is room temperature 30°C. The ball-to-material ratio in the ball milling process is 15:1, the ball milling time is 36 hours, and the ball mill speed is 200r / min. The drying temperature is 10...
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