| 摘要 |
<p>PURPOSE: To provide a method and a device for forming a bearing race having a ceramic characteristic on a raceway track, having a metallic characteristic at a position apart from the raceway track, and having a ceramic/metal structure with a gradational composition containing no clear junction between a ceramic material and a metal material. CONSTITUTION: A device for obtaining a bearing race having desirable characteristics of a ceramic and a metal via a gradational composition of a ceramic material and a metal material is a thermal spray device 54 including a plasma spray gun 20 serving as a main body for forming a gradational structure of the ceramic and the metal. It is constituted of first and second powder feed sections 84, 82 feeding ceramic and metal powder to the gun 20 and a control unit 72 adjusting the temperature and flow of flames and the quantity of the powder. The gun 20 allows the composite sticking of the powder on a carbon mandrel 100 with a plasma spray 52, and the bearing race with the gradational composition is obtained.</p> |
