Honda Giken Kogyo Kabushiki Kaisha

Tamotsu Harada

Mitsuo Kuwabara

Teruaki Yoshida

Kiyoshi Ikegami

Fumio Hirai

Koji Takahashi

Takeshi Komiyama

Masamichi Hayashi

Yukihiro Yaguchi

A method of producing a molded ceramic article comprises the first step mixing powdery raw materials and a liquid additive, thereby obtaining a mixed raw material, the second step press-molding the mixed raw material obtained in the first step in a hydrostatically applied condition of pressure, thereby removing an excess of the liquid additive to obtain a preform, and the third step calcining the preform obtained in the second step to obtain a molded ceramic article. The molded ceramic article comprises, as a principal component, copper and, as essential components, Cr and Ni within composition ranges of 0.1.ltoreq.Cr&lt;2 wt. % and 0.1.ltoreq.Ni&lt;10 wt. % and further at least one additive component selected from the group consisting of the following composition ratios: the following composition ratios: 0&lt;Fe&lt;5 wt. %, 0.ltoreq.Co&lt;5 wt. %, 0.ltoreq.Al&lt;10 wt. %, 0.ltoreq.Ti&lt;20 wt. %, 0.ltoreq.Mo&lt;3 wt. %, 0.ltoreq.Si&lt;3 wt. %, 0.ltoreq.V&lt;3 wt. %, 0.ltoreq.Mg&lt;1 wt. %, and 0.ltoreq.C&lt;5 wt. %, and has at least one composition range selected from the group consisting of the following composition ratios: 0&lt;O.sub.2 &lt;10 wt. %, 0&lt;N.sub.2 &lt;5 wt. % and 0&lt;B&lt;10 wt. %.

Molded ceramic articles and production method thereof

A method of producing a molded ceramic article comprises the first step mixing powdery raw materials and a liquid additive, thereby obtaining a mixed raw material, the second step press-molding the mixed raw material obtained in the first step in a hydrostatically applied condition of pressure, thereby removing an excess of the liquid additive to obtain a preform, and the third step calcining the preform obtained in the second step to obtain a molded ceramic article. The molded ceramic article comprises, as a principal component, copper and, as essential components, Cr and Ni within composition ranges of 0.1.ltoreq.Cr&lt;2 wt. % and 0.1.ltoreq.Ni&lt;10 wt. % and further at least one additive component selected from the group consisting of the following composition ratios: the following composition ratios: 0&lt;Fe&lt;5 wt. %, 0.ltoreq.Co&lt;5 wt. %, 0.ltoreq.Al&lt;10 wt. % 0.ltoreq.Ti&lt;20 wt. %, 0.ltoreq.Mo&lt;3 wt. %, 0.ltoreq.Si&lt;3 wt. % 0.ltoreq.V&lt;3 wt. % 0.ltoreq.Mg&lt;1 wt. % and 0.ltoreq.C&lt;5 wt. % and has at least one composition range selected from the group consisting of the following composition ratios: 0&lt;O.sub.2 &lt;10 wt. %, 0&lt;N.sub.2 &lt;5 wt. % and 0&lt;B&lt;10 wt. %.

Molded ceramic articles

A method of producing a molded ceramic article comprises the first step mixing powdery raw materials and a liquid additive, thereby obtaining a mixed raw material, the second step press-molding the mixed raw material obtained in the first step in a hydrostatically applied condition of pressure, thereby removing an excess of the liquid additive to obtain a preform, and the third step calcining the preform obtained in the second step to obtain a molded ceramic article. The molded ceramic article comprises, as a principal component, copper and, as essential components, Cr and Ni within composition ranges of 0.1.ltoreq. Cr&lt; 2 wt. % and 0.1.ltoreq. Ni&lt; 10 wt. % and further at least one additive component selected from the group consisting of the following composition ratios: the following composition ratios: O&lt;Fe&lt; 5 wt. %, O.ltoreq.Co&lt; 5 wt. %, O.ltoreq.Al&lt; 10 wt. %, O.ltoreq.Ti&lt; 20 wt. %, O.ltoreq.Mo&lt; 3 wt. %, O.ltoreq.Si&lt; 3 wt. %, O.ltoreq.V&lt; 3 wt. %, O.ltoreq.Mg&lt; 1 wt. % and O.ltoreq.C &lt; 5 wt % and has at least one composition range selected from the group consisting of the following composition ratios: O&lt;O.sub.2 &lt;10 wt. %, O&lt;N.sub.2 &lt;5 wt. % and O&lt;B&lt; 10 wt. %.

For resistance-welding workpieces of metal, an electrode is pressed against superposed regions of the workpieces and an electric current is supplied to the superposed regions to heat the same due to an electric resistance of the workpieces. The electrode has a body having a tip end for pressed engagement with one of the workpieces, and a matrix of tapered teeth disposed on the tip end of the body except for a center of the tip end. The teeth define recesses therebetween. One of the recesses is positioned at the center of the tip end, and the teeth are progressively higher from an outer circumferential edge of the tip end toward the center thereof.

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Sayama, Japan

Tamotsu Harada