JP2005320592A - 極低酸素鉄および鉄合金の溶製方法 - Google Patents
極低酸素鉄および鉄合金の溶製方法 Download PDFInfo
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Abstract
【解決手段】 鉄または鉄合金の溶湯中に、水素化チタン、水素化ジルコニウム、水素化マグネシウム、水素化バナジウム、水素化リチウム、水素化ナトリウム、水素化カリウム、水素化カルシウム、希土類水素化物および水素化された水素吸蔵合金のいずれか1種または2種以上を混合した固体金属水素化物を添加し脱酸する。
【選択図】 図2
Description
C:10mass ppm、Si:5mass ppm、Mn:1mass ppm、P:10mass ppm、S:1mass ppm、N:4mass ppm、O:830mass ppmおよびH:0.48mass ppm、Fe:99.9mass%、残部不可避的不純物からなる市販の純鉄原料1kgを、外径:63mmφ×内径:53mmφ×高さ:100mmのアルミナ坩堝中に装入し、この坩堝を雰囲気調整が可能な電気炉(図1参照)にセットし、炉内を真空に引いた後、アルゴンガスを1気圧となるよう導入して置換してから、アルゴンガスを流しつつ昇温し、1600℃で純鉄原料を溶落させて、溶解した溶湯を1550℃に保持しながら、水素化チタン(TiH2)を1gずつ、合計8gを溶湯上部の添加管から添加し、石英管で攪拌した。その際、水素化チタンを添加する前と添加後の溶湯を数回に分けてサンプリングし、速やかに冷却してHとOのガス分析を行った。同様にして、水素化ジルコニウム(ZrH2)を1gずつ、合計15gを溶湯上部から添加する実験も行い、水素化ジルコニウムを添加する前と添加後の溶湯中のHとOのガス分析を行った。
本発明は、上記知見に基くものである。
b:アルミナ坩堝
c:溶解原料(純鉄)
d:固体金属水素化物添加管
e:Arガス雰囲気
f:炉芯管
g:真空引き、Arガス導入管
Claims (3)
- 鉄または鉄合金の溶湯中に固体金属水素化物を添加し脱酸することを特徴とする極低酸素鉄および鉄合金の溶製方法。
- 上記固体金属水素化物を、鉄または鉄合金の溶湯中の水素含有量が30mass ppm以上となるよう添加することを特徴とする請求項1に記載の溶製方法。
- 上記固体金属水素化物が、水素化チタン、水素化ジルコニウム、水素化マグネシウム、水素化バナジウム、水素化リチウム、水素化ナトリウム、水素化カリウム、水素化カルシウム、希土類水素化物および水素化された水素吸蔵合金のいずれか1種または2種以上を混合したものであることを特徴とする請求項1または2に記載の溶製方法。
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Cited By (1)
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CN113957505A (zh) * | 2021-10-25 | 2022-01-21 | 中国船舶重工集团公司第七二五研究所 | 一种氢化锆表面氢渗透阻挡层制备方法 |
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Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
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CN113957505A (zh) * | 2021-10-25 | 2022-01-21 | 中国船舶重工集团公司第七二五研究所 | 一种氢化锆表面氢渗透阻挡层制备方法 |
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