METHOD OF FORMING ON-METAL-BASE SUPERPOSITION MICROSTRUCTURE AND METHOD OF JOINING WITH PLASTIC

摘要

To provide a method of forming an on-metal-base superposition microstructure adapted to form a superposition microstructure on a metal base surface with a large area in a short time and realize mechanical joining of the metal base with plastic, while avoiding a multistep process and an accompanying expensive cost or without using a large-sized laser or ultimately using a laser itself.SOLUTION: A method of forming an on-metal-base superposition microstructure is to form a superposition microstructure by a process of applying mixed metal powders of two kinds or more of metal powders to a uniform thickness on a surface of a metal base, and baking them in a temperature range that is higher than a lowest temperature of melting points of metal elements contained in the mixed metal powders or than an eutectic temperature if forming an eutectic melt having a low melt point is formed between the metal powders and lower than a melt temperature of the metal base. Here, the metal powders are metal powders that, in a combination with a metal base, form an alloy with the surface of the metal base by baking in the temperature range.SELECTED DRAWING: Figure 2B