ホットスタンピング部材の生産性向上ならびに高機能化のための組織制御

山本 浩介; 飛鷹 健太; 森岡 健太郎; 須江 龍裕; 竹元 嘉利; 瀬沼 武秀

doi:10.9773/sosei.54.137

Journal of the Japan Society for Technology of Plasticity

Online ISSN : 1882-0166
Print ISSN : 0038-1586
ISSN-L : 0038-1586

Papers

Microstructural Control for Improving Productivity and Mechanical Properties of Hot-Stamped Products

Kousuke YAMAMOTO, Kenta HIDAKA, Kentarou MORIOKA, Tatsuhiro SUE, Yoshito TAKEMOTO, Takehide SENUMA

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Keywords: hot stamping, ultrahigh-strength steel sheets, austenite forming, martensite, high productivity.

JOURNAL FREE ACCESS

2013 Volume 54 Issue 625 Pages 137-142

DOI https://doi.org/10.9773/sosei.54.137

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Abstract

In this study, the effects of C and Mn contents on the evolution of microstructures in hot stamping processes have been investigated to find an alloy design for steels suitable for highly productive advanced hot stamping processes. A steel containing 0.28% C and 3% Mn was found suitable for advanced hot stamping technology and this steel shows a tensile strength of more than 2000MPa. An appropriate microstructural control of such steel exhibited a good strength-toughness balance and a high resistance to delayed fracture.

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