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翻訳と辞書　辞書検索 [ 開発暫定版 ] スポンサード リンク ferroniobium ： ウィキペディア英語版 ferroniobium Ferroniobium is an important iron niobium alloy, with a niobium content of 60-70%. It is the main source for niobium alloying of HSLA steel and covers more than 80% of the world wide niobium production. The niobium is mined from pyrochlore deposits and is subsequently transformed into the niobium pentoxide Nb2O5. This oxide is mixed with iron oxide and aluminium and is reduced in an aluminothermic reaction to niobium and iron. The ferroniobium can be purified by electron beam melting or used as it is. For alloying with steel the ferroniobium is added to molten steel before casting. The largest producers of ferroniobium are the same as for niobium and are located in Brazil and Canada.〔(【引用サイトリンク】 Niob für TESLA )〕 ==External links== * *(【引用サイトリンク】 Ferroniobium-Alloying Techniques ) *(ISO 5453:1980 Ferroniobium -- Specification and conditions of delivery ) 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「ferroniobium」の詳細全文を読む スポンサード リンク 翻訳と辞書 : 翻訳のためのインターネットリソース Copyright(C) kotoba.ne.jp 1997-2016. All Rights Reserved.