It refers to nonmetallic substances such as oxides and sulfides present inside metal materials. In particular, in steel materials, a wide variety of inclusions are produced depending on the manufacturing conditions, so controlling their type, shape, size, etc. is one of the important technical challenges. For this reason, nonmetallic inclusions generally refer to those in steel. Carbides, nitrides, intermetallic compounds, etc. are easy to dissolve or precipitate by heat treatment, so they are generally called precipitates in steel to distinguish them from nonmetallic inclusions, but the boundary between the two is not clear. Source: Heibonsha World Encyclopedia, 2nd Edition Information |
金属材料の内部に存在する酸化物,硫化物などの非金属物質を意味する。とくに鉄鋼材料では製造条件に応じて多種多様の介在物を生ずるので,その種類,形態,寸法などの制御が重要な技術的課題の一つとなる。このため一般に非金属介在物というときには鋼材のそれをさすことが多い。炭化物,窒化物,金属間化合物などは熱処理によって固溶させたり析出させたりすることが容易であるので,一般には鋼中析出物と呼んで非金属介在物と区別するが,両者の境目は明確ではない。
出典 株式会社平凡社世界大百科事典 第2版について 情報 |
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