The impact disrepair and the sticking failure are the two main failure forms of tools under the terms of ultimate heavy load.The impact disrepair is one rupture phenomenon which is brought about by the ultimately mechanical impact
yet the sticking failure is the other phenomenon of the surface damage of the tool
that is the cold welding happening between the fresh surface of chips and the tools’ which is under the action of both ultra-high temperature and ultra-high pressure.Through analyzing an...