Hollow member and method for forming hollow member
AssigneesFuji Giken Kabushiki Kaisha, Y-Tec Corporation
InventorsTakeshi Edahiro, Norifumi Akutagawa, Kyotaro Yamane, Teruhisa Hiraoka, Kazumi Yasuda, Shigeaki Ando, Masaru Hashimoto, Yuichi Ando, Tetsuya Tsuruta
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Abstract
A tubular hollow member to which torsion about a center line is applied is characterized in performing a partial heat treatment on part of a peripheral wall of the hollow member to make the hardness of an outer portion of the peripheral wall greater than the hardness before heating and greater than the hardness of an inner portion of the peripheral wall, and reduce a residual stress of the inner portion of the peripheral wall.
Claims5
A tubular hollow member to which torsion about a center line is applied, wherein
- a partial heat treatment is performed on part of a peripheral wall of the hollow member to make hardness of an outer portion of the peripheral wall greater than hardness of the outer portion before heating and greater than hardness of an inner portion of the peripheral wall, and reduce a residual stress of the inner portion of the peripheral wall.
A method for forming a tubular hollow member to which torsion about a center line is applied, wherein
- a partial heat treatment is performed on part of a peripheral wall of the hollow member to make hardness of an outer portion of the peripheral wall greater than hardness of the outer portion before heating and greater than hardness of an inner portion of the peripheral wall, and reduce a residual stress of the inner portion of the peripheral wall.
Dependencies are inferred from the claim text.