機械構造用非調質鋼のじん性におよぼす化学成分と熱間加工条件の影響

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タイトル別名
  • Effects of Chemical Composition and Hot Working Condition on the Toughness of Microalloyed Steels for Machine Structural Use
  • キカイ コウゾウヨウ ヒチョウシツ コウ ノ ジンセイ ニ オヨボス カガク

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抄録

Effects of chemical composition and hot working condition on the toughness of microalloyed steels for machine structural use were investigated. The results obtained were as follows.<br>(1) Decrease of C content, increase of Mn and Cr content, refining of prior austenite grain size and increase of cooling rate improve the toughness of microalloyed steel.<br>(2) Improved toughness by grain refining is mainly due to decrease of cleavage facet size. It is assumed that decrease of it lowered the brittle ductile transition temperature.<br>(3) Improved toughness by increase of Mn and Cr content is mainly due to decrease of cementite lath thickness. It is assumed that decrease of it is owing to “pearlite dilution”.

収録刊行物

  • 電気製鋼

    電気製鋼 55 (2), 110-120, 1984

    大同特殊鋼株式会社

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