PROCESS FOR MANUFACTURING TOOL STEEL WITH SUPERIOR ABRASION RESISTANCE FOR COLD WORKING

摘要

PURPOSE: A process for manufacturing tool steel for cold working is provided to endow tool steel with superior abrasion resistance and uniform carbide dispersion by spray forming. CONSTITUTION: In a method for manufacturing high speed tool steel by spray forming, the method is characterized in that an alloy comprising MoaCrbCxVyFez is melted, wherein 1.1wt.%<=a<=1.5wt.%, 5.0wt.%<=b<=5.6wt.%, 1.7wt.%<=x<=2.5wt.%, 8.0wt.%<=y<=12.0wt.%, 78.9wt.%<=z<=83.7wt.%; holding the temperature of above melt within liquidus temperature+(50 to 150 deg.C); spray forming the melt to obtain a bulk material; and hot working the bulk material at 950 to 1150 deg.C at a reduction ratio of greater than 80 %.