High-pressure water atomization method for water atomization medium, low price, quenching effect is good, but the resulting powder finished oxygen content of up to 1000 ~ 4000ppm, and high-pressure water atomization method of effective utilization of low energy. The oxygen content of the powder product can be reduced to 50 ppm by the use of inert gas protection, water addition of additives (eg alcohol), or deionization with deionized water. It is now possible to use oil instead of water to make pure powders. Since the 1970s, the fastest growing and most active is the high-pressure gas atomization method, which is one of the most promising processes for mass production of rapidly solidified powders.