MECHANICAL STRUCTURAL MEMBER AND PRODUCTION METHOD FOR SAME
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United States of America Patent
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Issued Date -
Oct 3, 2024
app pub date -
Apr 26, 2023
filing date -
May 9, 2022
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Abstract
Provided is a mechanical structural member that can reduce deformation and has high precision and excellent quality. The mechanical structural member has a groove (32) and a tooth (33) formed by plastic working, and includes a hardened layer (31a) with a uniform martensitic single phase structure formed on a surface by induction hardening, a core region (31b) having a sorbite structure, and a boundary layer (31c) in which a sorbite structure and a martensite structure are mixed, formed between the core region (31b) and the hardened layer (31a). Rockwell hardness in the core region is 13 to 28 (HRC), and a variation in the Rockwell hardness is within 6 (HRC).
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