INCREASING THE LIFETIME OF FORMING TOOLS

摘要

The paper presents an analysis of the causes of exclusion forming tools for hot forming from activities as well as analysis of factors affecting their life. These basic factors such as material of tool, tools design, production method, the method of heat treatment, thermal and mechanical stress of tool and conditions of forming. The paper also presents some options for increasing the life of forming tools for hot forming. These include the possibility of boriding, duplex treatment (plasma nitriding and PVD coating) and work hardening of surface layers.