高ひずみ付加粉末冶金プロセスによるSUS316L鋼の室温再結晶と結晶粒超微細化

DOI Web Site Web Site 被引用文献18件 参考文献19件

書誌事項

タイトル別名
  • Room Temperature Recrystallization and Ultra Fine Grain Refinement of an SUS316L Stainless Steel by High Strain Powder Metallurgy Process
  • コウ ヒズミ フカ フンマツ ヤキン プロセス ニヨル SUS316L コウ

この論文をさがす

抄録

The high strain powder metallurgy (HS-PM) process, which is a novel and the most efficient non-equilibrium powder metallurgy process, is applied to an SUS 316L austenitic stainless steel. The HS-PM process is a powder metallurgy process combining mechanical milling, heat treatment and sintering processes, and enables one to produce an ultra-fine grain structure. In the case of the SUS 316L stainless steel, room temperature recrystallization and recovery of an austenite phase take place because of the increased high angle grain boundary area and the existence of excess vacancies, which are stored during the milling process. Very fine ferrite grains are formed in the early stage of the milling and an ultra fine (α+γ) microduplex structure is formed at the end. In the case of higher energy milling, almost fully ferritic nanograin structure with an average grain size of approximately 20nm is formed. The ultra fine (α+γ) microduplex structure in the HS-PM processed powder accelerates precipitation of σ phase in the sintering process. The sintered compacts with a very fine (γ+σ) microduplex structure show an extremely high strength, i.e., more than three times higher 0.2% proof stress than the annealed parent material, without any severe depression in the elongation.

収録刊行物

  • 鉄と鋼

    鉄と鋼 84 (5), 357-362, 1998

    一般社団法人 日本鉄鋼協会

被引用文献 (18)*注記

もっと見る

参考文献 (19)*注記

もっと見る

キーワード

詳細情報 詳細情報について

問題の指摘

ページトップへ