The upsetting test of metal powder sintered preform by blow speed of the hydraulic press,crank press,pneumatic hammer and high energy rate forging hammer was reported.

 
  • 研究了用液壓機、曲柄壓力機、空氣錘及高速錘的打擊速度對粉末冶金燒結體進(jìn)行的鐓粗試驗。
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