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

*この研究の対応する著者

研究成果: Conference contribution

4 被引用数 (Scopus)

抄録

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.

本文言語English
ホスト出版物のタイトルMetal Forming 2014
編集者Fabrizio Micari, Livan Fratini
出版社Trans Tech Publications Ltd
ページ1075-1080
ページ数6
ISBN(電子版)9783038351931
DOI
出版ステータスPublished - 2014
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(印刷版)1013-9826
ISSN(電子版)1662-9795

Conference

Conference15th International Conference on Metal Forming 2014
国/地域Italy
CityPalermo
Period14/9/2114/9/24

ASJC Scopus subject areas

  • 材料科学(全般)
  • 材料力学
  • 機械工学

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