| 摘要 |
PROBLEM TO BE SOLVED: To provide a brake pad having a pressure plate showing a high adhering strength against a friction material and superior anticorrosion without using any harmful matter such as cyanide and fluorine compound or the like and irrespective of any type of adhesive agent and to provide a process of manufacture of these components. ! SOLUTION: A surface of pressure plate is made rough under blast treatment, an oxide film present on the surface is removed, after this removal, the plate is dried so as not to form any oxide film and then the plate is treated by gas soft nitriding under a state that no oxide film is present on the surface of this pressure plate. This invention can provide the pressure plate comprising: a nitrogen diffusion layer formed on a surface to be adhered; a nitrogen compound layer formed on the nitrogen diffusion layer, having arithmetic average roughness Ra of 1.5 μm to 8.0 μm, a ten-point average roughness Rz of 10 μm to 40 μm; and a porous layer formed at the oute |
