| 摘要 |
PURPOSE:To easily manufacture a composite material with superior mechanical properties, workability and chemical properties by spraying a nonmetallic material on a molten part formed on the surface layer of a metallic material by an ordinary welding method and mixing them to form a metallic-nonmetallic composite material layer on the surface layer of the metallic material. CONSTITUTION:A molten part is formed on the surface of a metallic material such as an Al alloy or an Fe alloy by an ordinary welding method such as MIG or arc welding or a build-up welding method. Nonmetallic powder having 10-80mum grain size is sprayed on the molten part and mixed to form a metallic-nonmetallic composite material layer on the surface layer of the metallic material. The conditions of welding using the nonmetallic powder are as follows: 150-250A current, 22-30V voltage and about 0.01-1.0cm<3>/min feed of the powder. The suitable mixing ratio of the nonmetallic powder in the composite material layer is 5-50%. As the nonmetallic material ceramics such as SiC or Si3N can be used besides Al2O3 or SiO2. |
