Equipment and method for preparing high-quality spherical welding powder
A high-quality, spherical technology, applied in the equipment and field of preparing high-quality spherical solder powder, can solve the problems of difficult control of sphericity of the surface structure of solder powder, complicated installation and maintenance, low atomization efficiency, etc., and achieve enhanced ultrasonic atomization efficiency , the temperature is uniform and pure, and the effect of improving the atomization effect
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[0051] Production example 3, production of Pb92.5Ag2.5Sn5.0 spherical solder powder. Pb92.5Ag2.5Sn5.0 alloy ingot is charged, the temperature of the melt holding furnace and the feeding tube is set to 380℃~390℃, the infrared radiation heater is set to 350℃, the ultrasonic atomization frequency is 49.6khz, and the rotation motor speed is set Set the oxygen content control value of the oxygen content analyzer to 110ppm, set the control value of the gas heating and cooling thermostat to 50℃, set the circulating fan speed to 680rpm, and use the intermittent screening process for Pb92.5Ag2.5Sn5.0 powder production , That is, the atomized powder is collected in the turnover tank and then fed to the ultrasonic sieving machine for screening. The average sphericity of the Pb92.5Ag2.5Sn5.0 powder produced by this process is> 0.95, the powder surface is smooth without obvious defects, and the oxygen content <100ppm, no satellite sphere under microscope.
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