Kabushiki Kaisha Kobe Seiko Sho

Akira Egami

Kiichi Narita

Masaya Ehira

Toshio Onoye

A cermet sintered body excellent in wear resistance, oxidation resistance and toughness, which is suitable for cutting tools. The cermet sintered body includes: a hard dispersion phase in an amount of from 70 to 95 wt. %, which contains TiC and/or Ti(C, N) and carbides (excluding TiC) and/or nitrides of one or more kinds selected from a group consisting of elements in IVa, Va, and VIa groups of the periodic system, and a binder phase in an amount of from 5 to 30 wt. %, which contains one kind or two or more kinds of iron family elements. Moreover, the average particle size of a raw powder of TiC and/or Ti(C, N) is in the range of 1.0 .mu.m or less, and TiC and/or Ti(C, N) are directly dissolved in a solid state in the carbides (excluding TiC) and/or nitrides during sintering, to form a hard dispersion phase. The hard dispersion phase thus obtained mainly contains solid-solutions without any structure having a core, and which has a uniform distribution of composition.

Cermet sintered body

A method for rapidly determining a sulfur level in materials, particularly molten metals or gases, the method comprising contacting a reference electrode made of a specific type of a metal and metal sulfide mixture with a sulfur-containing molten metal or gas serving also as a counter electrode through a sulfide solid electrolyte thereby measuring an electromotive force established between the electrodes. The working temperature of the molten metal or gas is also measured. These parameters measured are used to calculate a sulfur content based on a certain equation. The probe for carrying out the above method is also disclosed, which comprises a reference electrode made of a material having a certain sulfur potential, a mass of a solid electrolyte comprised of CaS and TiS.sub.2, the reference electrode being contacted with a molten metal or gas through the solid mass to form a cell, a means for measuring an electromotive force generated across the cell, and a means for measuring a working temperature of the molten metal or gas.

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Akashi, Japan

Akira Egami