CONSTITUTION:The hard coating layer consisting of the single layer of one kind among the groups of the carbide, nitride and oxide of the group 4a metals of the periodic table and the solid solns., of >=2 kinds thereof or plural layers of >=2 kinds thereof is formed on the surface of ...
A nitriding portion made of aluminum nitride as a main ingredient having a high concentration region in which an element mentioned below is existent at a high concentration and a low concentration region in which the element existent at a low concentration is formed on a surface of a substrate ...
CONSTITUTION:The hard coating layer consisting of the single layer of one kind among the groups of the carbide, nitride and oxide of the group 4a metals of the periodic table and the solid solns., of >=2 kinds thereof or plural layers of >=2 kinds thereof is formed on the surface of ...