マルテンサイト系析出硬化型ステンレス鋼の析出挙動に及ぼす Ti, Si の影響

概要

論文の詳細を見る
The effects of Si and Ti on the precipitation behavior of 14Cr-7Ni martensitic stainless steels during aging treatment have been investigated. Precipitates are examined by transmission electron microscopy, X-ray diffraction analysis and so on. In the steels containing Ti only, the shape of precipitates in the matrix changes from fine particles to rodshaped as the aging stage proceeded from peak hardness to over-aging. The precipitates are iderntified as Ni_3Ti, η phase. At an early stage of aging, predominant precipitations take place at grain boundaries. On the other hand, in the steels containing Si and Ti in combination, fine spherical precipitates are formed uniformly in the matrix. They are identified as Ni_<16>Ti_6Si_7 (G-phase) and coherent to the matrix. It is suggested that the coherent strain induced by the precipitates hardens the steel remarkably.
社団法人日本鉄鋼協会の論文
1986-02-01