When deposited with small power and short time,the phases in white layer are mainly Cr_(0.19)Fe_(0.07)Ni_(0.01),WC_(1-x),CoC_x and little of Ni-Cr-Fe,while with large power and long time,the phase are mainly(Cr Fe)_7C_3,CrC,Co_3W_3C and Ni-Cr-Fe.

• 当小功率短时间沉积时；白亮层的物相主要为Cr0.；19Fe0