The PM tool steel production process begins the same as the conventional tool steel production process. The metals are melted in the furnace and the proper alloying elements are added to the melt.
After the steel has been melted, the molten metal is poured through a high pressure nozzle in an atomization chamber. The steel is instantly frozen by a blast of nitrogen or argon gas. The nitrogen and/or argon causes the steel to seperate into tiny droplets about 50-100 microns in size. Each one of these tiny particles contains the same chemical composition. These micro-ingots are spherical in shape and have eliminated the segregation that occurs during the conventional tool steel production process.
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