The surfaces of U70MnSi and 40Cr were strengthened by a self-made electrical discharge surface strengthening equipment using hard alloy YG-8 and FW-1101 as electric pole.

• 采用硬质合金YG-8和堆焊焊条FW-1101作电极,在电火花表面强化器上分别处理了U70MnSi钢和40Cr钢的表面。