METHOD FOR MANUFACTURING CAM SHAFT OF MO-B BASED SPHEROIDAL GRAPHITE CAST IRON

摘要

PURPOSE: A method for manufacturing cam shaft of Mo-B based spheroidal graphite cast iron is provided to improve workability more than 300%, abrasion resistance, and durability by improving cooling temperature condition. CONSTITUTION: In a method for manufacturing a cam shaft of Mo-B based spheroidal graphite cast iron including the steps of melting alloy in an electric furnace, inoculating Mg into a ladle, inputting mold, soft annealing, the soft annealing is conducted at 730C for 70-140 minutes, and the cam shaft cast product is cooled to 450-350C at a cooling rate of 4-7C/minute.