Mitsubishi Materials Corporation

Tsutomu Oka

Saburo Wakita

Akira Mitsuhashi

Yoshiharu Mae

Hiroshi Miyata

Osami Noguchi

Yoshio Chiba

Minoru Nakane

Osamai Noguchi

A fillet welding apparatus for fillet welding on heads of valves for internal combustion engines, such apparatus including a valve blank stock storage station, a welding torch for fillet welding on valve heads of each valve blank, and feed apparatus for engaging and feeding valve blanks from the stock storage station to the welding torch and from the fillet welding torch to a product valve storage station, the feed apparatus including means for counting and feeding selected of the counted valves to a testing station.

Apparatus for applying hard facing to valve

A coated valve face of an engine valve is formed of an Fe-based alloy having a composition consisting essentially of, by weight, 0.7 to 1.5% of C, 10 to 15% of Mn, 24 to 30% of Cr, 6.1 to 9.8% of Mo, 10 to 15% of Ni, 0.1 to 0.4% of N, 0.2 to 1.5% of Si, and optionally at least one of 0.1 to 5% of Nb, 0.1 to 5% of Ta and 0.15% of W as required (the total content of Nb, Ta and W being limited to 5% or less), and the balance substantially Fe and inevitable impurities, and having a two-phase structure formed of an austenitic phase and an eutectic carbide phase. In another embodiment, the composition contains between 0.05 to 1% Co. The Fe-based alloys are preferably applied to the valve face by plasma beam or laser beam coating of powdered such alloys onto the valve face.

Engine valve having improved high-temperature wear resistance

In a Cu-alloy mold for use in centrifugal casting of Ti or Ti-alloys, the mold body is made of a Cu alloy satisfying the following relationship:

Cu-alloy mold for use in centrifugal casting of Ti or Ti alloy and

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Okegawa, Japan

Tsutomu Oka