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Research on steel for punch and matrix forming needle small hole

LI Wen-ping;Department of Mechanical and Electrical Engineering,Sichuan Vocational College of Information Technology;  
Taking the die parts for forming needle as research object, the wear extent and service life of the punch and matrix with different materials of Cr12MoV steel and7Cr7Mo2V2 Si steel were studied. The results showed that the service life of 7Cr7Mo2V2 Si steel die parts was increased as much as 50% than Cr12 MoV steel.
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