Springback-free Isothermal Forming of High-strength Steel Sheets and Aluminum Alloy Sheets under Warm and Hot Forming Conditions

• Yanagimoto Jun

  Environmental Conscious Ultra-Fine-Grained Steel Consortium of JRCM (The Japan Research and Development Center of Metals) Institute of Industrial Science, The University of Tokyo

• Oyamada Keigo

  Institute of Industrial Science, The University of Tokyo

抄録

Quasi-isothermal sheet forming experiments of 300 mm square–1 mm thickness sheets are conducted using newly developed forming dies with a built-in heater and a 3000 kN hydraulic press, and the characteristics of springback reduction due to the elevation in forming temperature are clarified. The springback-free forming of high-strength steel sheets is realized in the warm forming temperature range. This result is confirmed by isothermal V-bending tests in a hot compression testing machine, where a marked decrease in springback is observed when the forming temperature of mild, precipitation-hardened, TRIP and dual-phase steels is higher than 750 K, which is approximately the critical temperature for the onset of ferrite recrystallization.

収録刊行物

• ＩＳＩＪ　Ｉｎｔｅｒｎａｔｉｏｎａｌ

  ＩＳＩＪ　Ｉｎｔｅｒｎａｔｉｏｎａｌ 46 (9), 1324-1328, 2006

  一般社団法人 日本鉄鋼協会

キーワード

• sheet metal
• springback
• isothermal forming
• bending
• hot sheet forming
• warm sheet forming
• steels
• aluminum alloy
• recystallization

詳細情報

• CRID: 1390282681463401344
• NII論文ID: 10018425703
• NII書誌ID: AA10680712
• DOI: 10.2355/isijinternational.46.1324
• COI: 1:CAS:528:DC%2BD28XhtV2hsbbN
• ISSN: 13475460
• ISSN: 09151559
• Web Site: http://www.jstage.jst.go.jp/article/isijinternational/46/9/46_9_1324/_pdf
• 本文言語コード: en
• データソース種別:
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• 抄録ライセンスフラグ: 使用不可