Effects of Chemical Composition and Hot Working Condition on the Toughness of Microalloyed Steels for Machine Structural Use

DOI Web Site

Bibliographic Information

Other Title
  • 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
  • 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

Search this article

Abstract

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”.

Journal

  • DENKI-SEIKO

    DENKI-SEIKO 55 (2), 110-120, 1984

    Daido Steel Co., Ltd.

Details 詳細情報について

Report a problem

Back to top