Kabushiki Kaisha Kobe Seiko Sho

Kobe Steel, Ltd.

Takefumi Horiuchi

Yoshio Kawate

Nobuyuki Nagai

Takao Fujikawa

Shuzo Ito

Masato Moritoki

Shigeo Kofune

Takeshi Kanda

Yoshihiro Yamaguchi

Tomiharu Matsushita

Minoru Kitamura

Tatsu Fujita

Masao Nishihara

Masahiko Ohgami

Saburo Tsurutani

Teruhisa Uehara

Shigeki Tojyo

Yoshiyuki Monju

Masami Konishi

Susumu Hachiya

Kenichi Tochimori

Toshio Inoue

Masayoshi Iwaskai

Tatsuo Uesaka

Tsunesaburo Asada

Masataka Noguti

Kiyoshi Matsumoto

A method of measuring the temperature in a high pressure furnace of a hot isostatic pressing apparatus, wherein a closed-end pipe having its inside communicated with the inside of the high pressure furnace and enabling a pressure medium to pass therethrough is disposed in the furnace, an incident top end of an optical fiber, a bundle of optical fibers or like other equivalent optical rod-like memeber is disposed to the open end of the closed-end pipe so as to be capable of receiving thermally radiated light from the inside of the closed-ended pipe and an exit rear end thereof is led out through a cover and to the outside of said high pressure vessel and a measuring system is connected to said exit rear end to detect heat radiation power from the top end of the closed-end pipe to thereby measure the temperature inside of the furnace.

Method and apparatus for measuring temperature in the high pressure

A probe for detecting wear of a refractory wall, including plural sheathed probe elements of different lengths each consisting of a pair of high melting point wires disposed in parallel and insulated from each other except at least the fore end portions of the wires which form a normally closed or normally open sensing point, a sheath enclosure accommodating the probe elements such that the sensing points of the respective probe elements are located at different positions along the length of the sheath enclosure and holding the probe elements in parallel relation and out of contact with each other, and a number of dummy elements formed of a material similar to the probe elements and connected to the fore ends thereof in a manner to complement the lengths of the shorter of the probe elements. There is also disclosed a detection circuit for monitoring wear of a refractory wall in a molten metal processing apparatus in a simple and accurate manner by the use of the probe.

Probe and a system for detecting wear of refractory wall

A thermal sensor for detecting temperature distribution in a deposit layer on the refractory walls of a blast furnace or the like, including a temperature probe assembly having temperature sensing areas at different points along the length thereof, an outer protective casing for accommodating the probe assembly, a number of annular fin members fitted on the temperature sensing areas of the probe assembly and secured to the outer protective casing, and an insulating material filled between the outer protective casing and the probe assembly for thermally insulating the fine members from each other.

Thermal sensor for detecting temperature distribution

A method of monitoring the wear of refractor walls of a blast furnace wherein temperature is sensed at different points across the thickness of the furnace walls and various electric representations of the internal phenomena of the blast furnace are derived as trigger signals. Analysis is carried out as to the correlation between the trigger signals and variations in the temperatures at the furnace walls in terms of the time delay, thus predicting the present status of the wear of the furnace walls. A temperature probe assembly is also disclosed which is useful in sensing the temperature distribution of the refractory walls. The temperature probe assembly includes a plurality of parallel sheath type thermocouples or thermometers.

Method of monitoring the wear of refractory walls of a blast furnace and

In the manufacture of compound billets composed of two or more different metals for use in hydrostatic extrusion, care must be exercised to see whether or not products possessing a predetermined compound status are produced from the compound billets by means of the hydrostatic extrusion process. The compound billets manufactured through the method of this invention do not, in the hydrostatic extrusion process, possess the usual defects caused by discrepancies between the mechanical properties of a plurality of different metallic materials constituting the billets, especially, and in particular, it is true that the compound billets are free from defects caused by surface slip taking place between the surfaces of the internal and external layer materials of the compound billet of the different metallic materials, and the method according to the present invention is characterized in that the formation of the nose part is undertaken by plastic forming of the same, such as roll forming and swazing, from the outside while maintaining an interior condition wherein air is expelled from the space formed between the contacting surfaces of the different metallic materials. As a result, the materials are mechanically bonded together and the surface areas of the materials of the billet at the deformed nose portion to be presented to the die are equal and it becomes possible to carry out a hydrostatic extrusion of the compound materials under a combination of different metallic materials covering an extremely wide selection.

Method of manufacturing compound billets for hydrostatic extrusion

Growing community of inventors

Kobe, Japan

Takefumi Horiuchi