THERMOCOUPLE PROTECTION TUBE

• Main Authors: ASHIMURA NAOYOSHI, YASUDA TSUJIHIKO, HAYASHI KAZUHIRO, HANNOU AKIYOSHI, ITO TAKAYOSHI
• Format: Patent
• Language: English
• Published: 27.07.2001
• Edition: 7
• Subjects: ALLOYS; CHEMICAL SURFACE TREATMENT; CHEMISTRY; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATIONOR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY IONIMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; COATING MATERIAL WITH METALLIC MATERIAL; COATING METALLIC MATERIAL; DIFFUSION TREATMENT OF METALLIC MATERIAL; FERROUS OR NON-FERROUS ALLOYS; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION INGENERAL; MEASURING; MEASURING QUANTITY OF HEAT; MEASURING TEMPERATURE; METALLURGY; PHYSICS; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THESURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; TESTING; THERMALLY-SENSITIVE ELEMENTS NOT OTHERWISE PROVIDED FOR; TREATMENT OF ALLOYS OR NON-FERROUS METALS

PROBLEM TO BE SOLVED: To provide a thermocouple protection tube which will not result in practical weight increase, will not reduce heat transfer performance, and can drastically extend the duration period. SOLUTION: The part of a thermocouple protection tube 12A having a heat resistive alloy substrate, which requires at least high temperature corrosion resistivity and abrasion resistivity at a high level is made of a substrate B of cobalt group alloy, indicating the characteristic of melting point higher than 1,300 deg.C. On the substrate B surface, tangusten carbide (WC) group spray coat 24, sealed 26 with heat resistive paint, is formed.