Improvement in punching properties of high tensile strength steel sheet by heat-treatments for reduction of center segregation

Kota Sakumoto, Kazuhiko Yamazaki, Takashi Kobayashi, Shinsuke Suzuki

研究成果: Conference contribution

3 引用 (Scopus)

抜粋

We investigated punching properties (crack in punched surface and hole expansion ratio) of high tensile strength steel sheets with and without center segregation. High strength steel sheets were heat-treated to reduce center segregation. Tensile strength, shear surface ratio, depth of rollover and burr height were measured on heat-treated steel sheets to confirm the effect of heat-treatment on strength. The EPMA analysis showed that the center segregation of Mn was reduced by the diffusion during heat-treatment. Crack-formation frequency and hole expansion ratio were also measured. As a result, the center segregation of Mn in high tensile strength steel sheets decreased by the heat-treatment (600 deg;C for 100 h) with maintaining the tensile strength, the depth of rollover and the burr height. The crack-formation frequency of the steel sheets decreased through heat-treatments.

元の言語English
ホスト出版物のタイトルMetal Forming 2014
編集者Fabrizio Micari, Livan Fratini
出版者Trans Tech Publications Ltd
ページ1075-1080
ページ数6
ISBN(電子版)9783038351931
DOI
出版物ステータスPublished - 2014 1 1
イベント15th International Conference on Metal Forming 2014 - Palermo, Italy
継続期間: 2014 9 212014 9 24

出版物シリーズ

名前Key Engineering Materials
622-623
ISSN(印刷物)1013-9826
ISSN(電子版)1662-9795

Conference

Conference15th International Conference on Metal Forming 2014
Italy
Palermo
期間14/9/2114/9/24

ASJC Scopus subject areas

  • Materials Science(all)
  • Mechanics of Materials
  • Mechanical Engineering

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  • これを引用

    Sakumoto, K., Yamazaki, K., Kobayashi, T., & Suzuki, S. (2014). Improvement in punching properties of high tensile strength steel sheet by heat-treatments for reduction of center segregation. : F. Micari, & L. Fratini (版), Metal Forming 2014 (pp. 1075-1080). (Key Engineering Materials; 巻数 622-623). Trans Tech Publications Ltd. https://doi.org/10.4028/www.scientific.net/KEM.622-623.1075