JP4953370B2 - 耐硝酸腐食性および機械的性質に優れたNb−W合金及びその製造方法 - Google Patents
耐硝酸腐食性および機械的性質に優れたNb−W合金及びその製造方法 Download PDFInfo
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- JP4953370B2 JP4953370B2 JP2007117946A JP2007117946A JP4953370B2 JP 4953370 B2 JP4953370 B2 JP 4953370B2 JP 2007117946 A JP2007117946 A JP 2007117946A JP 2007117946 A JP2007117946 A JP 2007117946A JP 4953370 B2 JP4953370 B2 JP 4953370B2
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- 229910020015 Nb W Inorganic materials 0.000 title claims description 47
- GRYLNZFGIOXLOG-UHFFFAOYSA-N Nitric acid Chemical compound O[N+]([O-])=O GRYLNZFGIOXLOG-UHFFFAOYSA-N 0.000 title claims description 46
- 229910017604 nitric acid Inorganic materials 0.000 title claims description 46
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- 229910001080 W alloy Inorganic materials 0.000 claims description 2
- 239000010955 niobium Substances 0.000 description 37
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- 238000009835 boiling Methods 0.000 description 25
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- XKRFYHLGVUSROY-UHFFFAOYSA-N Argon Chemical compound [Ar] XKRFYHLGVUSROY-UHFFFAOYSA-N 0.000 description 4
- QCWXUUIWCKQGHC-UHFFFAOYSA-N Zirconium Chemical compound [Zr] QCWXUUIWCKQGHC-UHFFFAOYSA-N 0.000 description 4
- 238000001704 evaporation Methods 0.000 description 4
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- 229910052698 phosphorus Inorganic materials 0.000 description 4
- 238000007670 refining Methods 0.000 description 4
- 239000000126 substance Substances 0.000 description 4
- 229910052721 tungsten Inorganic materials 0.000 description 4
- 229910052726 zirconium Inorganic materials 0.000 description 4
- 229910052770 Uranium Inorganic materials 0.000 description 3
- 239000002253 acid Substances 0.000 description 3
- 238000004090 dissolution Methods 0.000 description 3
- 229910052748 manganese Inorganic materials 0.000 description 3
- 229910021645 metal ion Inorganic materials 0.000 description 3
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- 239000002994 raw material Substances 0.000 description 3
- 238000005728 strengthening Methods 0.000 description 3
- JFALSRSLKYAFGM-UHFFFAOYSA-N uranium(0) Chemical compound [U] JFALSRSLKYAFGM-UHFFFAOYSA-N 0.000 description 3
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 2
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 2
- 229910001029 Hf alloy Inorganic materials 0.000 description 2
- 229910003192 Nb–Ta Inorganic materials 0.000 description 2
- 229910052778 Plutonium Inorganic materials 0.000 description 2
- 238000010521 absorption reaction Methods 0.000 description 2
- 229910052786 argon Inorganic materials 0.000 description 2
- 230000015572 biosynthetic process Effects 0.000 description 2
- -1 cerium ions Chemical class 0.000 description 2
- 230000000052 comparative effect Effects 0.000 description 2
- 239000012141 concentrate Substances 0.000 description 2
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- 229910001090 inconels X-750 Inorganic materials 0.000 description 2
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- 229910044991 metal oxide Inorganic materials 0.000 description 2
- 150000004706 metal oxides Chemical class 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- 229910052750 molybdenum Inorganic materials 0.000 description 2
- GUCVJGMIXFAOAE-UHFFFAOYSA-N niobium atom Chemical compound [Nb] GUCVJGMIXFAOAE-UHFFFAOYSA-N 0.000 description 2
- OYEHPCDNVJXUIW-UHFFFAOYSA-N plutonium atom Chemical compound [Pu] OYEHPCDNVJXUIW-UHFFFAOYSA-N 0.000 description 2
- 238000011084 recovery Methods 0.000 description 2
- 239000006104 solid solution Substances 0.000 description 2
- 239000002904 solvent Substances 0.000 description 2
- GUVRBAGPIYLISA-UHFFFAOYSA-N tantalum atom Chemical compound [Ta] GUVRBAGPIYLISA-UHFFFAOYSA-N 0.000 description 2
- 238000005979 thermal decomposition reaction Methods 0.000 description 2
- WFKWXMTUELFFGS-UHFFFAOYSA-N tungsten Chemical compound [W] WFKWXMTUELFFGS-UHFFFAOYSA-N 0.000 description 2
- 239000010937 tungsten Substances 0.000 description 2
- 229910052684 Cerium Inorganic materials 0.000 description 1
- VYZAMTAEIAYCRO-UHFFFAOYSA-N Chromium Chemical compound [Cr] VYZAMTAEIAYCRO-UHFFFAOYSA-N 0.000 description 1
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- 230000032683 aging Effects 0.000 description 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- 229910001566 austenite Inorganic materials 0.000 description 1
- 229910001430 chromium ion Inorganic materials 0.000 description 1
- 239000011248 coating agent Substances 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 230000001276 controlling effect Effects 0.000 description 1
- 239000002826 coolant Substances 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- 239000010949 copper Substances 0.000 description 1
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- 229910052735 hafnium Inorganic materials 0.000 description 1
- VBJZVLUMGGDVMO-UHFFFAOYSA-N hafnium atom Chemical compound [Hf] VBJZVLUMGGDVMO-UHFFFAOYSA-N 0.000 description 1
- 239000002927 high level radioactive waste Substances 0.000 description 1
- 229910052739 hydrogen Inorganic materials 0.000 description 1
- 230000003993 interaction Effects 0.000 description 1
- 229910000765 intermetallic Inorganic materials 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
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- 238000000197 pyrolysis Methods 0.000 description 1
- 238000006722 reduction reaction Methods 0.000 description 1
- 239000003870 refractory metal Substances 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 229910052707 ruthenium Inorganic materials 0.000 description 1
- 238000005204 segregation Methods 0.000 description 1
- VSZWPYCFIRKVQL-UHFFFAOYSA-N selanylidenegallium;selenium Chemical compound [Se].[Se]=[Ga].[Se]=[Ga] VSZWPYCFIRKVQL-UHFFFAOYSA-N 0.000 description 1
- 230000035945 sensitivity Effects 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
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- 238000005406 washing Methods 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
- 230000004580 weight loss Effects 0.000 description 1
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Description
本実施の形態におけるNb−W合金は、具体的には、W:4.0〜15.0wt%、Ta:3.0wt%以下、C:0.03wt%以下、N:0.03wt%以下、O:0.03wt%以下を含有し、Nbおよび不可避的不純物を残部として成る。
ここで、Nb−W合金を含むNb基合金の鋼塊の溶製工程において、電子ビーム溶解法を採用している。本実施の形態における合金は、高融点金属である。よって、このような合金の溶製工程においては、組織の均一化の観点から電子ビーム溶解法が好ましい。また、Oなどの不純物含有量を低減する観点からも、電子ビーム溶解法が好ましい。
図1は、本実施の形態におけるNb−W合金を含むNb基合金の耐食性の評価試験結果を示したものである。また、図2は、本実施の形態におけるNb−W合金を含むNb基合金の機械的性質の評価試験結果を示したものである。腐食試験は、8規定沸騰硝酸に1.0g/LのCr6+を添加した溶液を用い、1バッチ24時間毎に試験液を更新しながら5バッチ継続した。また、機械的性質を評価するための引張試験は、耐食性評価試験の沸騰伝熱面条件の腐食電位がほぼ同等になる14規定沸騰硝酸溶液中で実施した。
次に、本実施の形態に係るNb−W合金の製造方法について、以下の実施例を参照しながら説明する。
以上のように、本実施の形態の耐硝酸腐食性および機械的性質に優れたNb−W合金は、Wを4.0〜15.0wt%、Taを3.0wt%以下、Cを0.03wt%以下、Nを0.03wt%以下、Oを0.03wt%以下の比率でそれぞれ含有し、Nb及び不可避的不純物を残部として成る構成にされている。
Claims (2)
- Wを4.0〜15.0wt%、Taを3.0wt%以下、Cを0.03wt%以下、Nを0.03wt%以下、Oを0.03wt%以下の比率でそれぞれ含有し、Nb及び不可避的不純物を残部として成ることを特徴とする耐硝酸腐食性および機械的性質に優れたNb−W合金。
- Wを4.0〜15.0wt%、Taを3.0wt%以下、Cを0.03wt%以下、Nを0.03wt%以下、Oを0.03wt%以下の比率でそれぞれ含有し、Nb及び不可避的不純物を残部として成るNb−W合金の鋼塊の溶製工程で、電子ビーム溶解法による溶解を前記鋼塊に施すことを特徴とする耐硝酸腐食性および機械的性質に優れたNb−W合金の製造方法。
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JP2007117946A JP4953370B2 (ja) | 2007-04-27 | 2007-04-27 | 耐硝酸腐食性および機械的性質に優れたNb−W合金及びその製造方法 |
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JP2007117946A JP4953370B2 (ja) | 2007-04-27 | 2007-04-27 | 耐硝酸腐食性および機械的性質に優れたNb−W合金及びその製造方法 |
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JP4953370B2 true JP4953370B2 (ja) | 2012-06-13 |
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JP2007117946A Active JP4953370B2 (ja) | 2007-04-27 | 2007-04-27 | 耐硝酸腐食性および機械的性質に優れたNb−W合金及びその製造方法 |
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Family Cites Families (3)
Publication number | Priority date | Publication date | Assignee | Title |
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JPS512612A (ja) * | 1974-06-25 | 1976-01-10 | Daido Steel Co Ltd | Taishokuniobugokin |
JPH0615706B2 (ja) * | 1985-03-14 | 1994-03-02 | 三井造船株式会社 | 高耐食アモルフアス合金 |
JPH01242729A (ja) * | 1988-03-24 | 1989-09-27 | Kobe Steel Ltd | 高融点金属材料の電子ビーム溶解法 |
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