Study on Surface-Strengthening of TD Method on Cold-Work Die;
TD法盐浴渗钒在冷作模表面强化中的应用研究
Since TD method(Toyota Diffusion or Thermal Diffusion)was invented by Toyota Central Graduate School of Japanese in the late 1960s ,this process has been widely used on a variety of parts and moulds for it s outstanding effect on surface strengthening.