Corrosion resistant zirconium alloy

Abstract

Abstract PURPOSE:To obtain a Zr alloy having superior nodular corrosion resistance and mechanical characteristics and causing hardly bending and warping by leaving compressive stress on the surface of a Zr alloy having an alpha-phase crystal structure. CONSTITUTION:A Zr alloy is melted, forged, not extruded, and subjected to repeated cold working and annealing, and the final annealing is carried out at a prescribed temp. for a prescribed time to obtain a Zr alloy contg. no residual strain and having an alpha-phase crystal structure. After the final annealing, the Zr alloy is passed through a heat treatment stage to leave residual stress on the surface. In the stage, the surface part of the alloy is rapidly heated to a temp. in the alpha-phase region by high frequency heating, and it is rapidly cooled after holding at the temp. for several sec. Thus, the desired Zr alloy as a structural material is obtd.

Inventors

• 👤 Emiko Higashinakagaha
• 👤 東中川　恵美子
• 👤 Kanemitsu Sato
• 👤 佐藤　金光
• 👤 Junko Kawashima
• 👤 川島　純子
• 👤 Yoshinori Kuwae
• 👤 桑江　良昇
• 👤 Tadashi Sakuyama
• 👤 作山　忠

Bibliographic Details