テーラードブランク材のエリクセン値に及ぼす<br>熱影響部軟化の影響

DOI Web Site 被引用文献2件 参考文献5件

書誌事項

タイトル別名
  • Effect of Heat-Affected-Zone Softening on Erichsen Value<br> of Tailored Blanks
  • テーラード ブランクザイ ノ エリクセンチ ニ オヨボス ネツ エイキョウブ ナンカ ノ エイキョウ

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説明

Tailored blanks are widely used for automobile bodies as a material, that achieves not only weight reduction but also maintains of strength and rigidity for an auto body. High-strength steel whose tensile strength is 590MPa or higher is usually strengthened by transformation hardening. When such occurring high-strength steel is welded, the weld metal becomes harder than the base metal owing to heat input and the subsequent rapid cooling occurring during the welding, while the heat-affected zone (HAZ) is possibly caused by temper softening. In this study, the relationship between a formability and HAZ hardness changes in laser welding was evaluated. As a result, the widths of the weld metal and HAZ became narrower and the Erichsen value was enhanced with an increase in the welding speed. In cases in which the width of the hardened weld metal is constant, when the softening degree and region width of HAZ are large, the Erichsen value deteriorates.

収録刊行物

  • 塑性と加工

    塑性と加工 48 (562), 1012-1016, 2007

    一般社団法人 日本塑性加工学会

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