Honda Giken Kogyo Kabushiki Kaisha

Tadao Kanno

Teruoki Watanabe

Shunji Kobayashi

Akio Hidaka

Tomonori Taoka

Teiji Suzuki

Isao Takikawa

Method and apparatus for highly strengthening metal member

The concentration of cavities in a formed product formed by superplastic forming is measured based on a propagation velocity of ultrasonic waves in the formed product. An ultrasonic measuring head which oscillates and receives ultrasonic waves is brought into contact with the formed product. A measurement is made of the propagation time required for the ultrasonic waves to be incident from the ultrasonic measuring head on the formed product to return to the ultrasonic measuring head upon reflection from a rear surface of the formed product. The propagation velocity is obtained from the measured propagation time and the thickness of the formed product.

Method of measuring cavities in formed product formed by superplastic

A method for continuously treating an iron member wherein the iron member is first subjected to furnace-brazing in a controlled gas environment and subsequently to a soft-nitriding treatment by addition of ammonia gas (NH.sub.3) to the controlled gas for the brazing. An apparatus for carrying out the method is also provided, and includes three partitioned chambers for brazing, annealing and soft-nitriding the iron member, each chamber being partitioned by a member such as a stainless steel film curtain at opposite sides thereof. A controlled gas feed system communicates with each of the chambers, and an ammonia gas feed system is connected to the soft-nitriding chamber.

Method and apparatus for the continuous furnace brazing and gas

Method and apparatus for the continuous furnace brazing and

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Sayama, Japan

Tadao Kanno