Nippon Steel Sumitomo Metal Corporation

Sumitomo Metal Industries, Inc.

Masaaki Mizuguchi

Takashi Maeda

Masanori Takahashi

Yoshiro Matsumoto

Kazumi Isaka

Osamu Takatsu

Yoshimitsu Oshima

Disclosed are a Ti alloy having an excellent hydrogen absorption inhibition effect, a Ti alloy member using the Ti alloy, and a manufacturing thereof. A Ti alloy is characterized in that it contains 0.1 to 5.0% by mass in total of at least one of Zr and Hf, and a residue comprising Ti and impurities.

Ti alloy and Ti alloy member having Zr and Hf, or Zr and Nb, or Zr, Hf, and Nb for hydrogen embrittlement resistance

A hearth roller has an outer sleeve which constitutes a hearth roller barrel is disclosed. An inner sleeve is fitted into the outer sleeve and innermost sleeve is fitted into the inner sleeve. The ends of the inner sleeve in the axial direction are positioned inwardly and separated from each of the ends of the outer sleeve and are sealed by a metal. The inner sleeve has substantially the same linear expansion coefficient as the outer sleeve but exhibits higher thermal conductivity.

Hearth roller with suppressed heat crown

Growing community of inventors

Joetsu, Japan

Masaaki Mizuguchi