JP2019089125A - 溶解鋳造工程における酸化物分散強化f/m鋼の製造方法 - Google Patents
溶解鋳造工程における酸化物分散強化f/m鋼の製造方法 Download PDFInfo
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- 229910000831 Steel Inorganic materials 0.000 title claims abstract description 96
- 239000010959 steel Substances 0.000 title claims abstract description 96
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 23
- 230000008018 melting Effects 0.000 title claims abstract description 18
- 238000005266 casting Methods 0.000 title claims abstract description 14
- 239000006185 dispersion Substances 0.000 title claims abstract description 8
- 238000010309 melting process Methods 0.000 title claims abstract description 7
- 238000010438 heat treatment Methods 0.000 claims abstract description 21
- 229910052760 oxygen Inorganic materials 0.000 claims abstract description 21
- 239000000843 powder Substances 0.000 claims abstract description 20
- 238000005096 rolling process Methods 0.000 claims abstract description 14
- 229910052710 silicon Inorganic materials 0.000 claims abstract description 10
- 229910052719 titanium Inorganic materials 0.000 claims abstract description 10
- 238000005496 tempering Methods 0.000 claims abstract description 9
- 229910052757 nitrogen Inorganic materials 0.000 claims abstract description 8
- 229910052715 tantalum Inorganic materials 0.000 claims abstract description 8
- 229910052721 tungsten Inorganic materials 0.000 claims abstract description 8
- 229910052720 vanadium Inorganic materials 0.000 claims abstract description 8
- 229910052804 chromium Inorganic materials 0.000 claims abstract description 7
- 229910052748 manganese Inorganic materials 0.000 claims abstract description 7
- 229910052698 phosphorus Inorganic materials 0.000 claims abstract description 7
- 229910052717 sulfur Inorganic materials 0.000 claims abstract description 7
- 238000010791 quenching Methods 0.000 claims abstract description 3
- 230000000171 quenching effect Effects 0.000 claims abstract description 3
- 229910001175 oxide dispersion-strengthened alloy Inorganic materials 0.000 claims description 53
- 238000000034 method Methods 0.000 claims description 40
- 230000008569 process Effects 0.000 claims description 28
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims description 23
- 238000002844 melting Methods 0.000 claims description 15
- 239000002245 particle Substances 0.000 claims description 15
- 229910000734 martensite Inorganic materials 0.000 claims description 14
- 239000000047 product Substances 0.000 claims description 14
- 239000011362 coarse particle Substances 0.000 claims description 13
- 229910052742 iron Inorganic materials 0.000 claims description 13
- 229910052761 rare earth metal Inorganic materials 0.000 claims description 12
- 239000010936 titanium Substances 0.000 claims description 12
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 claims description 11
- 238000001816 cooling Methods 0.000 claims description 11
- 238000005242 forging Methods 0.000 claims description 11
- 239000001301 oxygen Substances 0.000 claims description 11
- 238000009826 distribution Methods 0.000 claims description 10
- 238000005098 hot rolling Methods 0.000 claims description 8
- 239000000155 melt Substances 0.000 claims description 8
- 229910001404 rare earth metal oxide Inorganic materials 0.000 claims description 8
- 239000011265 semifinished product Substances 0.000 claims description 8
- 229910045601 alloy Inorganic materials 0.000 claims description 7
- 239000000956 alloy Substances 0.000 claims description 7
- 229910052727 yttrium Inorganic materials 0.000 claims description 7
- 239000011651 chromium Substances 0.000 claims description 6
- 239000010419 fine particle Substances 0.000 claims description 6
- 229910000859 α-Fe Inorganic materials 0.000 claims description 6
- 239000002994 raw material Substances 0.000 claims description 5
- 238000005275 alloying Methods 0.000 claims description 4
- 238000005097 cold rolling Methods 0.000 claims description 4
- VWQVUPCCIRVNHF-UHFFFAOYSA-N yttrium atom Chemical compound [Y] VWQVUPCCIRVNHF-UHFFFAOYSA-N 0.000 claims description 4
- 230000006698 induction Effects 0.000 claims description 3
- 239000003921 oil Substances 0.000 claims description 3
- 150000002910 rare earth metals Chemical class 0.000 claims description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 3
- VYZAMTAEIAYCRO-UHFFFAOYSA-N Chromium Chemical compound [Cr] VYZAMTAEIAYCRO-UHFFFAOYSA-N 0.000 claims description 2
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 claims description 2
- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical compound [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 claims description 2
- 230000000694 effects Effects 0.000 claims description 2
- 238000003760 magnetic stirring Methods 0.000 claims description 2
- 238000007670 refining Methods 0.000 claims description 2
- 239000010703 silicon Substances 0.000 claims description 2
- 239000007921 spray Substances 0.000 claims description 2
- GUVRBAGPIYLISA-UHFFFAOYSA-N tantalum atom Chemical compound [Ta] GUVRBAGPIYLISA-UHFFFAOYSA-N 0.000 claims description 2
- WFKWXMTUELFFGS-UHFFFAOYSA-N tungsten Chemical compound [W] WFKWXMTUELFFGS-UHFFFAOYSA-N 0.000 claims description 2
- LEONUFNNVUYDNQ-UHFFFAOYSA-N vanadium atom Chemical compound [V] LEONUFNNVUYDNQ-UHFFFAOYSA-N 0.000 claims description 2
- 239000000463 material Substances 0.000 abstract description 8
- 239000000203 mixture Substances 0.000 abstract description 3
- 239000007769 metal material Substances 0.000 abstract description 2
- 239000000523 sample Substances 0.000 description 22
- 238000005551 mechanical alloying Methods 0.000 description 6
- 238000001350 scanning transmission electron microscopy Methods 0.000 description 5
- UQSXHKLRYXJYBZ-UHFFFAOYSA-N Iron oxide Chemical compound [Fe]=O UQSXHKLRYXJYBZ-UHFFFAOYSA-N 0.000 description 4
- 230000005540 biological transmission Effects 0.000 description 4
- 238000010894 electron beam technology Methods 0.000 description 4
- 239000000758 substrate Substances 0.000 description 4
- 238000004627 transmission electron microscopy Methods 0.000 description 4
- 230000009471 action Effects 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- 150000002500 ions Chemical class 0.000 description 3
- 239000002105 nanoparticle Substances 0.000 description 3
- 239000011224 oxide ceramic Substances 0.000 description 3
- 230000005855 radiation Effects 0.000 description 3
- 239000010409 thin film Substances 0.000 description 3
- XKRFYHLGVUSROY-UHFFFAOYSA-N Argon Chemical compound [Ar] XKRFYHLGVUSROY-UHFFFAOYSA-N 0.000 description 2
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 2
- 230000004075 alteration Effects 0.000 description 2
- 238000012937 correction Methods 0.000 description 2
- 239000013078 crystal Substances 0.000 description 2
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- 230000003993 interaction Effects 0.000 description 2
- 229910052574 oxide ceramic Inorganic materials 0.000 description 2
- 239000002244 precipitate Substances 0.000 description 2
- 238000001556 precipitation Methods 0.000 description 2
- 238000011160 research Methods 0.000 description 2
- 238000004626 scanning electron microscopy Methods 0.000 description 2
- 238000005245 sintering Methods 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- 238000003723 Smelting Methods 0.000 description 1
- 230000004913 activation Effects 0.000 description 1
- 238000004458 analytical method Methods 0.000 description 1
- 229910052786 argon Inorganic materials 0.000 description 1
- 229910001566 austenite Inorganic materials 0.000 description 1
- 230000015556 catabolic process Effects 0.000 description 1
- UPHIPHFJVNKLMR-UHFFFAOYSA-N chromium iron Chemical compound [Cr].[Fe] UPHIPHFJVNKLMR-UHFFFAOYSA-N 0.000 description 1
- 230000001427 coherent effect Effects 0.000 description 1
- 239000000470 constituent Substances 0.000 description 1
- 238000006731 degradation reaction Methods 0.000 description 1
- 238000000280 densification Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000004090 dissolution Methods 0.000 description 1
- 238000002003 electron diffraction Methods 0.000 description 1
- 238000002524 electron diffraction data Methods 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 238000001125 extrusion Methods 0.000 description 1
- 239000007789 gas Substances 0.000 description 1
- 238000009689 gas atomisation Methods 0.000 description 1
- 238000001513 hot isostatic pressing Methods 0.000 description 1
- 238000003384 imaging method Methods 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 150000001247 metal acetylides Chemical class 0.000 description 1
- 238000004452 microanalysis Methods 0.000 description 1
- 238000002156 mixing Methods 0.000 description 1
- SIWVEOZUMHYXCS-UHFFFAOYSA-N oxo(oxoyttriooxy)yttrium Chemical compound O=[Y]O[Y]=O SIWVEOZUMHYXCS-UHFFFAOYSA-N 0.000 description 1
- 238000005498 polishing Methods 0.000 description 1
- 230000006641 stabilisation Effects 0.000 description 1
- 238000011105 stabilization Methods 0.000 description 1
- 238000005728 strengthening Methods 0.000 description 1
- 238000003325 tomography Methods 0.000 description 1
- 229910052726 zirconium Inorganic materials 0.000 description 1
Classifications
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C32/00—Non-ferrous alloys containing at least 5% by weight but less than 50% by weight of oxides, carbides, borides, nitrides, silicides or other metal compounds, e.g. oxynitrides, sulfides, whether added as such or formed in situ
- C22C32/001—Non-ferrous alloys containing at least 5% by weight but less than 50% by weight of oxides, carbides, borides, nitrides, silicides or other metal compounds, e.g. oxynitrides, sulfides, whether added as such or formed in situ with only oxides
- C22C32/0015—Non-ferrous alloys containing at least 5% by weight but less than 50% by weight of oxides, carbides, borides, nitrides, silicides or other metal compounds, e.g. oxynitrides, sulfides, whether added as such or formed in situ with only oxides with only single oxides as main non-metallic constituents
- C22C32/0026—Matrix based on Ni, Co, Cr or alloys thereof
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D8/00—Modifying the physical properties by deformation combined with, or followed by, heat treatment
- C21D8/005—Modifying the physical properties by deformation combined with, or followed by, heat treatment of ferrous alloys
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
- B22D27/00—Treating the metal in the mould while it is molten or ductile ; Pressure or vacuum casting
- B22D27/20—Measures not previously mentioned for influencing the grain structure or texture; Selection of compositions therefor
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- C21D6/00—Heat treatment of ferrous alloys
- C21D6/002—Heat treatment of ferrous alloys containing Cr
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- C21D6/00—Heat treatment of ferrous alloys
- C21D6/005—Heat treatment of ferrous alloys containing Mn
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- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D6/00—Heat treatment of ferrous alloys
- C21D6/008—Heat treatment of ferrous alloys containing Si
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- C22C33/00—Making ferrous alloys
- C22C33/04—Making ferrous alloys by melting
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- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/001—Ferrous alloys, e.g. steel alloys containing N
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- C22C38/002—Ferrous alloys, e.g. steel alloys containing In, Mg, or other elements not provided for in one single group C22C38/001 - C22C38/60
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- C22C38/02—Ferrous alloys, e.g. steel alloys containing silicon
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Abstract
Description
溶解鋳造工程における酸化物分散強化F/M鋼の製造方法を提供する。真空誘導/磁気撹拌工程を用いて製鋼し、溶解温度が鉄の融点以上100〜200℃であること、酸素活量を十分に確保する溶鋼を事前に溶鋼中の[O]とマッチする希土類元素Yを添加した鋳型の中へ迅速に鋳造することにより、希土類元素Yと溶鋼中の[O]との結合を介して希土類酸化物分散分布のODS鋼を得ることを特徴とする。具体的なステップは以下である。ステップ1、鋳型の中へ得ようとするY2O3の量に応じる希土類Y粉(0.01〜1wt%)を加える。ステップ2、工業的純鉄等をるつぼ内に加え、先に真空引きを5〜40Paまでにした時送電し、精錬が開始する。溶解温度は鉄の融点以上100〜200℃にする。ステップ3、溶解の際に脱酸元素Alの焼損により脱酸の程度をコントロールし、酸素濃度[O]が30ppm〜200ppmのときに合金元素を加えて合金化を行う。ステップ4、マイクロ合金化処理が終了すると、迅速に溶鋼を鋳型に鋳造する。注湯温度は溶鋼の流動性に応じて決め、流動性を確保すると共に溶鋼温度を可能な限り下げる。ステップ5、インゴットに対して熱間鍛造、熱間圧延を行う。ステップ6、熱間加工後のスラブを熱処理し、酸化物分散強化(ODS)フェライト/マルテンサイト鋼を得る。
前述新規ODS製造工程に従って製造したODS RAFM鋼の各種成分が占める全質量の割合は、C:0.08〜0.15%、Cr:8.0〜14%、Mn:0.45〜0.6%、W:1.0〜2.5%、N:0.05〜0.07%、Ta:0.010〜0.20%、Ti:0.02〜0.55%、Si:0.10〜0.15%、V:0.04〜0.5%、O:30〜200ppm B<0.001%、S<0.003%、P<0.005%、Fe残量、鋳型中のY粉:0.05%であり、以下のステップによって製品を製造する。
前述新規ODS製造工程に従って製造したODS RAFM鋼の各種成分が占める全質量の割合は、C:0.08〜0.15%、Cr:8.0〜14%、Mn:0.45〜0.6%、W:1.0〜2.5%、N:0.05〜0.07%、Ta:0.010〜0.20%、Ti:0.02〜0.55%、Si:0.10〜0.15%、V:0.04〜0.5%、O:30〜200ppm B<0.001%、S<0.003%、P<0.005%、Fe残量、鋳型中的Y粉:0.8%であり、以下のステップによって製品を製造する。
Claims (9)
- 鋳型の中へ得ようとするY2O3の量に応じる希土類Y粉(0.01〜1wt%)を加えるステップ(1)と、
工業的純鉄等をるつぼ内に加え、先に真空引きを5〜40Paまでにした時送電し、精錬を開始させ、溶解温度を鉄の融点以上100〜200℃にするステップ(2)と、
溶解の際に脱酸元素Alの焼損により脱酸の程度をコントロールし、酸素濃度[O]が30ppm〜200ppmのときに合金元素を加えて合金化を行うステップ(3)と、
マイクロ合金化処理が終了すると、迅速に溶鋼を鋳型に鋳造する。注湯温度は溶鋼の流動性に応じて決め、流動性を確保すると共に溶鋼温度を可能な限り下げるステップ(4)と、
インゴットに対して熱間鍛造、熱間圧延を行うステップ(5)と、
熱間加工後のスラブを熱処理し、酸化物分散強化(ODS)フェライト/マルテンサイト鋼を得るステップ(6)と、を含む、
真空誘導/磁気撹拌工程を用いて製鋼し、溶解温度を鉄の融点以上100〜200℃にし、酸素活量を十分に確保する溶鋼を事前に溶鋼中の[O]とマッチする希土類元素Yを添加した鋳型の中へ迅速に鋳造することにより、希土類元素Yと溶鋼中の[O]との結合を介して希土類酸化物分散分布のODS鋼を得ることを特徴とする溶解鋳造工程における酸化物分散強化F/M鋼の製造方法。 - 使用した原料はそれぞれ純銑ブロック(ヒューズ)、純クロム粉(粗粒子)、純タングステン粉(粗粒子)、純タンタル粉(粗粒子)、純チタン粉(粗粒子)、純Mn粉(粗粒子)、純シリコンブロック、純バナジウム粉(微粒子)、純イットリウム粉(微粒子)であり、全原料の純度が99.9%以上である。前記粗粒子は粒子の大きさが297μm(50メッシュ)以上またはイコールであることを指し、微粒子は粒子の大きさが15μm(900メッシュ)以下またはイコールであることを特徴とする請求項1に記載の溶解鋳造工程における酸化物分散強化F/M鋼の製造方法。
- 各種成分が占める全質量の割合は、C:0.08〜0.15%、Cr:8.0〜14%、Mn:0.45〜0.6%、W:1.0〜2.5%、N:0.05〜0.07%、Ta:0.010〜0.20%、Ti:0.02〜0.55%、Si:0.10〜0.15%、V:0.04〜0.5%、O:30〜200ppm、B<0.001%、S<0.003%、P<0.005%、鋳型中のY粉:0.01〜1%、Fe残量、であることを特徴とする請求項1に記載の溶解鋳造工程における酸化物分散強化F/M鋼の製造方法。
- 前記熱間鍛造、熱間圧延ステップは、
鋼塊または連続的に鋳造バーの鍛造又は圧延によって1回目の熱変形を行い、半製品を得るステップ(1)と、
前記半製品を1150℃〜1200℃の範囲に加熱し、冷間圧延を制御する工程を用い、熱間圧延を通して再度変形させ、所望の形状と寸法を有する製品を得るステップ(2)と、
室温まで冷却した製品を850〜1100℃の温度範囲に加熱して15〜120min保持し、オーステナイト化熱処理を行うステップ(3)と、
オーステナイト化熱処理した後の製品を50℃以下に冷却し、その後製品を710〜800℃の温度範囲に加熱して90〜150min保持し、焼戻し熱処理を行ってマルテンサイト製品を得るステップ(4)と、を含むことを特徴とする請求項1に記載の溶解鋳造工程における酸化物分散強化F/M鋼の製造方法。 - ステップ(1)における前記鍛造または圧延の温度範囲は1100℃〜800℃であることを特徴とする請求項4に記載の溶解鋳造工程における酸化物分散強化F/M鋼の製造方法。
- ステップ(1)における前記熱変形した後の冷却作業は先に水によって600℃まで冷却した後大気中で行い、室温まで冷却することを特徴とする請求項4に記載の溶解鋳造工程における酸化物分散強化F/M鋼の製造方法。
- ステップ(2)における前記冷間圧延を制御する工程の開始圧延温度は1100℃〜1050℃で、仕上げ圧延温度は950〜800℃にコントロールし、圧延後オンラインスプレーを用いて冷却することを特徴とする請求項4に記載の溶解鋳造工程における酸化物分散強化F/M鋼の製造方法。
- ステップ(3)における前記オーステナイト化熱処理制度は、850〜1100℃/15〜120minで焼入れ、710〜800℃/90〜120min焼戻し、オーステナイト化熱処理後の作業は油の中で行うことを特徴とする請求項4に記載の溶解鋳造工程における酸化物分散強化F/M鋼の製造方法。
- ステップ(4)における前記焼き戻し熱処理後の冷却作業は大気中で行うことを特徴とする請求項4に記載の溶解鋳造工程における酸化物分散強化F/M鋼の製造方法。
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