Effect of Aluminum Content on the Mechanical Properties of Dual Stabilized Ti–Nb Interstitial Free High Strength Steel (IF-HSS)

• Kang Heejae

  POSCO, Technical Research Labs, Automotive Steels Research Group

• Garcia C. Isaac

  Basic Metals Processing Research Institute (BAMPRI), Department of Material Science and Engineering

• Chin Kwanggeun

  POSCO, Technical Research Labs, Automotive Steels Research Group

• Deardo Anthony J.

  Basic Metals Processing Research Institute (BAMPRI), Department of Material Science and Engineering

書誌事項

タイトル別名

• Effect of Aluminum Content on the Mechanical Properties of Dual Stabilized Ti–Nb Interstitial Free High Strength Steel (IF-HSS)

抄録

The effect of aluminum content during the annealing of interstitial free high strength steel (IF-HSS) containing Mn, P, Ti and Nb was investigated. The resulting mechanical properties were evaluated and recorded. The results showed that a super formable high strength IF steel with an r-value equal to or higher than 2.3 can be obtained by Al additions. One of the interesting observations of this investigation was the change of precipitation behavior with aluminum content. Aluminum has the effect of improving the formability, especially the drawability, of the IF-HSS when more than 0.10 wt% Al is added. Texture analysis showed that the ‹111›//ND fiber (γ-fiber) was intensified, and ‹110›//RD (α-fiber) was weakened, with an increase of aluminum content. These benefits appear to result from the change of precipitation behavior with the increase of aluminum content. It was confirmed thorough the SANS analysis that the size of the precipitates in the sample with higher aluminum content was larger and their number was much fewer than in the sample with lower aluminum content. It appears that the high aluminum in IF-HSS containing Mn, P, Ti and Nb strengthened the scavenging effect of Ti or Nb and thus purifies the iron matrix.

収録刊行物

• ＩＳＩＪ　Ｉｎｔｅｒｎａｔｉｏｎａｌ

  ＩＳＩＪ　Ｉｎｔｅｒｎａｔｉｏｎａｌ 47 (3), 486-492, 2007

  一般社団法人 日本鉄鋼協会

キーワード

• ultra low carbon steel
• IF-HSS
• aluminum
• drawability
• precipitation

詳細情報

• CRID: 1390001206489131264
• NII論文ID: 10027022358
• NII書誌ID: AA10680712
• DOI: 10.2355/isijinternational.47.486
• COI: 1:CAS:528:DC%2BD2sXjs1Sjs7Y%3D
• ISSN: 13475460
• ISSN: 09151559
• Web Site: https://www.jstage.jst.go.jp/article/isijinternational/47/3/47_3_486/_pdf
• 本文言語コード: en
• データソース種別:
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  • Crossref
  • CiNii Articles
• 抄録ライセンスフラグ: 使用不可