| 号数 | ばね論文集 66 号（ 2021 年） |
| ページ数 | pp.1-6 |
| 種類 | 論文 |
| 論文名 | 伸線−時効処理された二相ステンレス鋼線の強度特性に及ぼす金属組織の影響 |
| Title | Effect of the Microstructure on Strength properties of the Duplex Stainless Steel wire after Cold drawing and Aging |
| 著者 | 山先祥太1)，高野光司1) |
| Author | Shota YAMASAKI1),Kohji TAKANO1) |
| 抄録 | オーステナイト安定度の異なる2種類の二相ステンレス鋼の伸線加工硬化特性および時効硬化特性、剛性率を調査し、相比やα/γ成分分配挙動、結晶方位などの金属組織との関係を考察した。断面減少率75%で伸線加工されたSUS821L1の引張強さはSUS329J3Lに比べ約230MPa高く、ばね用ステンレス鋼線B種を満足する。伸線加工-時効処理されたSUS821L1の剛性率はSUS329J3Lに比べ約85GPaとなり、時効前後で約10GPa高い。冷間加工-時効処理されたSUS821L1の高強度および高剛性率の主因子は過飽和窒素を含有した加工誘起マルテンサイトに起因すると考える。 |
| Abstract | Mechanical properties（work-hardening and age-hardening, rigidity modulus）of the duplex stainless steels composed of different austenitic stability were investigated. The relationship between their mechanical properties and metallography such as phase fractions, α/γ component distribution, crystal orientation was discussed. The tensile strength of SUS821L1 after cold drawing at a cross-sectional reduction of 75 ％ is about 230 MPa higher than that of SUS329J3L and satis es the B type standard of spring stainless steel wire. The rigidity modulus of SUS821L1 after drawing and aging is about 85 GPa. It is about 10GPa higher than that of SUS329J3L. The main factor of the high strength and high rigidity modulus of SUS821L1 after drawing and aging is suggested by the deformation-induced martensite containing supersaturated nitrogen. |
| 著者の所属 | 1)日鉄ステンレス株式会社 |
| Belonging | 1)NIPPON STEEL Stainless Steel Corporation |
| Key Words | Duplex stainless, Rigidity modulus, Strength, Nitrogen, Deformation induced martensite |