Process for producing aluminum-based composite member
摘要
An aluminum-based composite member having an increased strength of bond between an aluminum-based body and a cast iron material portion which is incorporated into the aluminum-based body by casting is provided by an improved process. The following steps are employed in the process: a step of removing an oxide film on the surface of the cast iron material portion and activating such surface; a step of forming a protecting plated-layer having a thickness a in a range of 0.8 mu m</=a</=5 mu m on the surface of the cast iron material portion; a step of preheating the cast iron material portion in a reducing gas atmosphere and reducing an oxide on the surface of the protecting plated-layer; a step of vanishing the protecting plated-layer by a diffusing phenomenon and forming an aluminum-based alloy plated layer on the surface of the cast iron material portion by immersing the cast iron material portion into a molten aluminum-based alloy; a step of quenching the cast iron material portion in an inert gas atmosphere; and a step of incorporating the cast iron material portion into the aluminum-based body by casting.
