| 摘要 |
PURPOSE:To uniformly and densely fill a powdery lining material into a narrow space to be filled with the lining material on a substrate without producing a void by evacuating the space and filling the lining material. CONSTITUTION:When the body 1 of a valve made of low-alloy steel is lined with a powdery lining material 4 to <=10mm thickness by hot isostatic press working, a thin capsule 2 made of mild steel is set on the inside of the body 1. The capsule 2 to be filled with the lining material is evacuated to about 10<-1>-10<-5>Torr and the powdery lining material 4 is filled into the capsule 2 from hoppers 3 after the material 4 is heated to about 300 deg.C so as to facilitate degassing. The filled material 4 is subjected to hot isostatic press working to form a lining layer 5. Even when the space to be filled with the lining material is narrow, the lining layer 5 is uniformly formed without mottled appearance or producing a void.
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