Press plate and method for producing it

摘要

Plate-like pressing tool has a working surface whose thermal expansion coefficient compared to the bearing material has a difference of not more than 2.5 x 10<-6>/K, preferably less than 1.4 x 10<-6>/K, and has a hardness of more than 44 HRC. An Independent claim is also included for a process for the production of a plate-like pressing tool comprising forming a plate or sheet having a cubic face-centered atomic structure having high plane parallelity of opposite-lying surfaces, and then applying a hard layer of 5-55 microns thickness to one side of the plate or sheet.