Manufacturing method for a permeable die steel

Abstract

A manufacturing method for a permeable die steel stacks and fixes a plurality of fixing blocks to form a molded die having an emplacing space which contains and fixes a plurality of polymeric wires. A metallic powder and an adhesive are installed in the emplacing space to form a green type, and to completely enclose the polymeric wires, after being mixed together. Next, the green type is heated up to totally vaporize the polymeric wires and is then cooled down, so as to constitute a metallic product having breathing holes, for serving as a die steel.

1 . A manufacturing method for a permeable die steel comprising steps of: 
 a). constructing a molded die wherein a molded die having an emplacing space is formed by stacking and fixing a plurality of fixing blocks, and polymeric wires are fixed inside the emplacing space;    b). forming a green type wherein a metallic powder and an adhesive are mixed and then fixed in the emplacing space of fixing blocks to completely enclose the polymeric wires, thereby forming a green type;    c). molding by heating up wherein the aforementioned green type is heated up to vaporize the polymeric wires in the green type, thereby forming breathing holes in the green type;    d). forming a metallic product wherein the green type is cooled down to form a metallic product having the breathing holes.    
   
   
       2 . The manufacturing method for a permeable die steel according to  claim 1 , wherein the polymeric wires are configured linearly.  
   
   
       3 . The manufacturing method for a permeable die steel according to  claim 1 , wherein the polymeric wires are configured in a mesh.  
   
   
       4 . The manufacturing method for a permeable die steel according to  claim 1 , wherein the process of molding by heating up includes a continual heat-up to 300° C. at a rising speed of 3° C. per minute, followed by maintaining a constant temperature of 300° C. for one hour, then a continual heat-up to 600° C. at a rising speed of 3° C. per minute, followed by maintaining a constant temperature of 600° C. for one hour, next a continual heat-up to 900° C., followed by maintaining a constant temperature of 900° C. and finally a stop.