To provide a highly corrosion-resistant and fracture-tough floating thermocouple probe for molten metal capable of measuring the temperature of the molten metal at a prescribed depth location from the surface of the molten metal.
The floating thermocouple probe for the molten metal is provided with thermocouple strands 3 having a joint 10 which connects the tips of the thermocouple strands 3 to each other; a thermo-sensitive part 8 made of a thermally good conductive material for housing the joint 10 so as to propagate the heat of a peripheral part; and a floater 6 made of a metal having a melting point higher than that of the molten metal in which the floating thermocouple probe is to be immersed. The thermo-sensitive part 8 is connected to a lower part of the floater 6, and the thermocouple strands 3 are passed through the inside of the floater 6. The thermo-sensitive part 8 and at least the peripheral surface of the floater 6 to be in contact with the molten metal are covered with a ceramic coating layer 12 via a fire-resistant fiber layer 11. The floating thermocouple probe floats by the buoyancy of the floater 6 in the case of immersion in the molten metal.
GEORGE HAITO
YOSHIKAWA HIDEO
Kakehi Yuro
Takeshi Ohara
Hiroji Nakagawa
Yasumitsu Tate
Kenji Saito
Jun Fujii
Hitoshi Seki
Mutsuko Nakano