合金工具鋼中の水素拡散に及ぼす焼入れ焼戻し組織

スポンサーリンク

概要

• 論文の詳細を見る

• The effect of quenched and tempered microstructures on the diffusion coefficient and solubility of hydrogen in the commercial alloy tool steels have been investigated at room temperature by means of the electrochemical permeation technique. The results obtained are as follows; (1) The as-quenched structure of martensite plus undissolved carbides gives a low diffusion coefficient, and the diffusion coefficient does not show the remarkable change with tempering temperature up to 300℃, after which in the case of SKS 3 steel, it increases with increasing temperature. However, in the case of SKD 4 and SKD 11 steels, the diffusion coefficient decreases with increasing temperature, reaching a minimum around 600℃ and 500℃ respectively and these decreases in diffusivity correspond to the "secondary hardening" in the tempering curve. (2) The solubility of hydrogen is high for the structure of quenched martensite plus undissolved carbides and there is an opposite relation between the diffusion coefficient and solubility, when the steels are tempered. (3) The variations in diffusivity and solubility can be explained in terms of hydrogen trapping process involving the lattice imperfections such as dislocations, faults, lattice vacancies and subgrain boundaries etc., introduced by martensitic transformation and or precipitation of carbides on tempering, togethet with the interfaces such as quenched martensite/undissolved carbides and the ferrite/precipitated carbides, depending upon tempering temperature.

著者

• 高尾 慶蔵

  長崎大工

関連論文

• 合金工具鋼中の水素拡散に及ぼす焼入れ焼戻し組織
• 炭素鋼中の水素拡散に及ぼす焼入れ焼戻し組織の影響
• 室温付近における銅中の水素の拡散および溶解
• 冷間圧延したPd中の水素トラップの一考察
• 高力ボルト綱中の水素拡散に及ぼす焼入れ焼もどし組織
• PC鋼中の水素拡散に及ぼす焼入れ焼戻し組織
• ニッケル電着時の水素透過に及ぼす添加剤の影響
• 21/4Cr-1 Mo鋼中の水素拡散に及ぼす焼入れ焼もどし組織(X線材料強度小特集)
• 各種構造用合金鋼中の水素拡散と焼入れ焼戻し組織
• トリポリリン酸ソ-ダを含む硫酸塩浴からのCu-Zn合金の電析
• エチレンジアミン浴からのCu-Zn合金の電析

もっと見る 閉じる

スポンサーリンク