| 摘要 |
The process of assembling two silicon carbide pieces (1, 2) by non-reactive, moderate refractory welding, comprises contacting the pieces with a non-reactive welding composition (4, 6), and heating an assembly formed by the pieces and the composition to a sufficient temperature for melting the composition and to form a moderate refractory joint (5). A reinforcement (5-49 mass%) is added to the welding composition before performing the welding operation, and is present in the form of powder, fibers, non-woven fibers, or tissue fibers. The process of assembling two silicon carbide pieces (1, 2) by non-reactive, moderate refractory welding, comprises contacting the pieces with a non-reactive welding composition (4, 6), and heating an assembly formed by the pieces and the composition to a sufficient temperature for melting the composition and to form a moderate refractory joint (5). A reinforcement (5-49 mass%) is added to the welding composition before performing the welding operation, and is present in the form of powder, fibers, non-woven fibers, or tissue fibers. The method further comprises forming a powder of the welding composition, performing suspension of the powder in an organic binder to obtain a suspension or paste, and coating the suspension or paste to a surface of the pieces to be assembled. The suspension or paste is contacted with the surface of the piece so that the suspension or paste is intercalated between them. The pieces to be joined are brought into contact by observing a gap (3) between them so as to create a surface capable of receiving the suspension or paste close to the joint surfaces, where carbon powder is deposited on the surface to be assembled before contacting it with suspension or paste. The welding is carried out at 1250[deg] C for 30 minutes, where an initial stage of welding is maintained at 1120-1150[deg] C for 60-90 minutes. Independent claims are included for: (1) a composition for non-reactive, moderate refractory welding of two silicon carbide pieces; (2) a suspension or welding paste; (3) a refractory joint; and (4) an assembly comprising two silicon carbide pieces. |
