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Summary & Details

Creation of Ultra-High-Strength Fail-Safe Bolt with High Resistance to Delayed Fracture

耐遅れ破壊特性に優れた超高強度フェールセーフボルトの創製

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Format: PDF

Price: Non-members (tax incl.)：￥1,100 Members (tax incl.)：￥880

Publication code: 20224248

Paper/Info type: Journal of Society of Automotive Engineers of Japan

Vol.76 No.4

Pages: 24-29(Total 6 p)

Date of publication: Apr 2022

Publisher: JSAE

Language: Japanese

Detailed Information

Category(J)	くるまは「ねじ」で出来ている Translation
Category(E)	Cars are made with Screws!
Author(J)	1) 木村勇次, 2) 井上忠信
Author(E)	1) Yuuji Kimura, 2) Tadanobu Inoue
Affiliation(J)	1) 物質・材料研究機構, 2) 物質・材料研究機構
Abstract(J)	引張強さが1.8 GPa以上のボルトを実現するには，水素に起因した遅れ破壊の克服だけでなく，ボルトへの成形技術の確立も不可欠となる．本稿では，焼戻マルテンサイト組織を有する調質鋼の温間加工という新規プロセスの開発で実現した超高強度フェールセーフボルトの金属組織設計および耐遅れ破壊特性を紹介する． Translation
Abstract(E)	To realize ultra-high-strength bolts with a tensile strength of 1.8 GPa or higher, it is essential not only to overcome hydrogen-induced delayed fracture but also to establish a forming technology for bolts. This paper introduces the microstructural design and delay fracture resistance of ultra-high-strength fail-safe bolts, which were achieved by developing a new process of warm working of quenched and tempered steels.

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