JP2021503558A - Npr非磁性ロックボルト鋼材料及びその生産方法 - Google Patents
Npr非磁性ロックボルト鋼材料及びその生産方法 Download PDFInfo
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- 229910000831 Steel Inorganic materials 0.000 title claims abstract description 132
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- 229910052791 calcium Inorganic materials 0.000 claims abstract description 9
- 229910052804 chromium Inorganic materials 0.000 claims abstract description 9
- 229910052802 copper Inorganic materials 0.000 claims abstract description 9
- 229910052748 manganese Inorganic materials 0.000 claims abstract description 9
- 229910052759 nickel Inorganic materials 0.000 claims abstract description 9
- 229910052717 sulfur Inorganic materials 0.000 claims abstract description 9
- 229910052698 phosphorus Inorganic materials 0.000 claims abstract description 8
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- XKRFYHLGVUSROY-UHFFFAOYSA-N Argon Chemical compound [Ar] XKRFYHLGVUSROY-UHFFFAOYSA-N 0.000 claims description 12
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- 235000008733 Citrus aurantifolia Nutrition 0.000 claims description 6
- 235000011941 Tilia x europaea Nutrition 0.000 claims description 6
- 238000004458 analytical method Methods 0.000 claims description 6
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- 239000004571 lime Substances 0.000 claims description 6
- 230000008569 process Effects 0.000 claims description 6
- 238000005275 alloying Methods 0.000 claims description 5
- WUKWITHWXAAZEY-UHFFFAOYSA-L calcium difluoride Chemical compound [F-].[F-].[Ca+2] WUKWITHWXAAZEY-UHFFFAOYSA-L 0.000 claims description 5
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- 229910045601 alloy Inorganic materials 0.000 claims 1
- 238000010586 diagram Methods 0.000 abstract description 11
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- 229910001566 austenite Inorganic materials 0.000 description 9
- PXHVJJICTQNCMI-UHFFFAOYSA-N nickel Substances [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 description 9
- 239000011651 chromium Substances 0.000 description 7
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- 230000008901 benefit Effects 0.000 description 5
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- 229910000859 α-Fe Inorganic materials 0.000 description 3
- OYPRJOBELJOOCE-UHFFFAOYSA-N Calcium Chemical compound [Ca] OYPRJOBELJOOCE-UHFFFAOYSA-N 0.000 description 2
- VYZAMTAEIAYCRO-UHFFFAOYSA-N Chromium Chemical compound [Cr] VYZAMTAEIAYCRO-UHFFFAOYSA-N 0.000 description 2
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 2
- PWHULOQIROXLJO-UHFFFAOYSA-N Manganese Chemical compound [Mn] PWHULOQIROXLJO-UHFFFAOYSA-N 0.000 description 2
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 description 2
- 238000002441 X-ray diffraction Methods 0.000 description 2
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- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- 229910000975 Carbon steel Inorganic materials 0.000 description 1
- CWYNVVGOOAEACU-UHFFFAOYSA-N Fe2+ Chemical compound [Fe+2] CWYNVVGOOAEACU-UHFFFAOYSA-N 0.000 description 1
- 229940123973 Oxygen scavenger Drugs 0.000 description 1
- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 description 1
- 238000010521 absorption reaction Methods 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 229910000963 austenitic stainless steel Inorganic materials 0.000 description 1
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- 230000005294 ferromagnetic effect Effects 0.000 description 1
- 230000005307 ferromagnetism Effects 0.000 description 1
- 229910000734 martensite Inorganic materials 0.000 description 1
- 150000001247 metal acetylides Chemical class 0.000 description 1
- 229910052755 nonmetal Inorganic materials 0.000 description 1
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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
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- C—CHEMISTRY; METALLURGY
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- C21C5/00—Manufacture of carbon-steel, e.g. plain mild steel, medium carbon steel or cast steel or stainless steel
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- C21C7/00—Treating molten ferrous alloys, e.g. steel, not covered by groups C21C1/00 - C21C5/00
- C21C7/04—Removing impurities by adding a treating agent
- C21C7/064—Dephosphorising; Desulfurising
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- C21C7/00—Treating molten ferrous alloys, e.g. steel, not covered by groups C21C1/00 - C21C5/00
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- C21C7/072—Treatment with gases
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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
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- C21D1/26—Methods of annealing
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- C21D6/00—Heat treatment of ferrous alloys
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- C21D7/00—Modifying the physical properties of iron or steel by deformation
- C21D7/02—Modifying the physical properties of iron or steel by deformation by cold working
- C21D7/10—Modifying the physical properties of iron or steel by deformation by cold working of the whole cross-section, e.g. of concrete reinforcing bars
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- C21D8/00—Modifying the physical properties by deformation combined with, or followed by, heat treatment
- C21D8/06—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of rods or wires
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- C21D9/00—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor
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- C21D9/00—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor
- C21D9/52—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor for wires; for strips ; for rods of unlimited length
- C21D9/525—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor for wires; for strips ; for rods of unlimited length for wire, for rods
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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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- C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
- C22C38/40—Ferrous alloys, e.g. steel alloys containing chromium with nickel
- C22C38/42—Ferrous alloys, e.g. steel alloys containing chromium with nickel with copper
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Abstract
Description
NPR非磁性ロックボルト鋼材料の組成比に合わせた合金元素を添加し、中間周波数製鋼プロセスによって製錬し、製錬中に活性石灰、蛍石を添加して造滓(造滓とは、スラグを生じることを指す)の調整を行い、完了後にオンライン成分分析を行い、合金元素を補充し、溶鋼の比例を設計比例に調整して、脱酸素、脱硫、脱燐を行う中間周波数製錬工程と、
中間周波炉で製錬された溶鋼を精錬炉に吊り込み、底部にアルゴンを3L/min〜60L/minのアルゴンガス量で吹かして精錬及び造滓を行い、フッ化カルシウム、石灰、脱滓剤を精錬炉に添加して、脱酸素、脱硫、脱燐をさらに行い、完了後にオンライン成分分析を行い、溶鋼の化学成分を微調整する精錬工程と、
精錬炉で精錬された溶鋼の出鋼温度を1560℃〜1590℃に制御して、精錬された溶鋼をタンディッシュに導入し、鋼型の予め保温しておく温度を200℃〜250℃に制御して鋳型鋳造し、自然冷却後に、離型する連続鋳型鋳造工程と、
鋳型鋳造工程後の冷却されたインゴットを加熱炉に入れて、1200℃の炉内温度で2時間〜4時間保温する加熱炉加熱工程と、
鋼スラブに対して熱間圧延処理を行い、そのうち、圧延開始温度が1050℃±50℃、圧延終了温度が850℃±50℃、圧延速度が8m/s〜10m/sに制御され、鋼スラブを熱間圧延処理後に、室温まで自然冷却する連続熱間圧延工程と、
熱間圧延丸鋼に対して連続冷間圧延を行い、異なった降伏強度及び伸びの需要に応じて、1時間保温してから、炉外で自然冷却処理を行う連続冷間圧延工程と、を含む。
また、前記精錬炉は、LF(Ladle Furnace)精錬炉であってもよい。
本発明の実施例によれば、NPR非磁性ロックボルト鋼材料が提供されている。NPRとは、負のポアソン比(Negative Poisson’s ratio)の材料を指す。NPR非磁性ロックボルト鋼材料の組成及び重量パーセント含有量としては、C:0.4%〜0.7%、Mn:15%〜20%、Cr:1%〜18%、Si:0.3%〜3%、Ca:0.05%〜0.15%、Cu:≦0.03%、Ni:≦0.02%、S:≦0.001%、P:≦0.001%、残りはFe及び不可避な不純物元素である。
Ni(ニッケル)は、鋼の強度、靭性、焼入れ性を高めることができ、一定量のニッケルを含むと、強度及び靭性を改善することができる。
Claims (5)
- NPR非磁性ロックボルト鋼材料であって、
その組成及び重量パーセント含有量としては、C:0.4%〜0.7%、Mn:15%〜20%、Cr:1%〜18%、Si:0.3%〜3%、Ca:0.05%〜0.15%、Cu:≦0.03%、Ni:≦0.02%、S:≦0.001%、P:≦0.001%、残りはFe及び不可避な不純物元素であることを特徴とするNPR非磁性ロックボルト鋼材料。 - 前記NPR非磁性ロックボルト鋼材料は、熱間圧延状態での降伏強度が600MPa〜1000MPa、引張強度が900MPa〜1100MPa、均一伸び≧20%〜50%であり、且つ、前記NPR非磁性ロックボルト鋼材料のポアソン比の値が0.003〜0.008であることを特徴とする請求項1に記載のNPR非磁性ロックボルト鋼材料。
- NPR非磁性ロックボルト鋼材料の生産方法であって、
前記NPR非磁性ロックボルト鋼材料は、熱間圧延丸鋼又は冷間圧延状態であり、前記NPR非磁性ロックボルト鋼材料の熱間圧延状態での降伏強度が600MPa〜1000MPa、引張強度が900MPa〜1100MPa、均一伸び≧20%〜50%であり、且つ、前記NPR非磁性ロックボルト鋼材料のポアソン比の値が0.003〜0.008であり、
前記NPR非磁性ロックボルト鋼材料の組成及び重量パーセント含有量としては、
C:0.4%〜0.7%、Mn:15%〜20%、Cr:1%〜18%、Si:0.3%〜3%、Ca:0.05%〜0.15%、Cu:≦0.03%、Ni:≦0.02%、S:≦0.001%、P:≦0.001%、残りはFe及び不可避な不純物元素であり、
前記生産方法は、
前記NPR非磁性ロックボルト鋼材料の組成比に合わせた合金元素を添加し、中間周波数製鋼プロセスによって製錬し、製錬中に活性石灰、蛍石を添加して造滓の調整を行い、完了後にオンライン成分分析を行い、合金元素を補充し、溶鋼の比例を設計比例に調整して、脱酸素、脱硫、脱燐を行う中間周波数製錬工程(S10)と、
中間周波炉で製錬された溶鋼を精錬炉に吊り込み、底部にアルゴンを3L/min〜60L/minのアルゴンガス量で吹かして精錬及び造滓を行い、フッ化カルシウム、石灰、脱滓剤を精錬炉に添加して、脱酸素、脱硫、脱燐をさらに行い、完了後にオンライン成分分析を行い、溶鋼の化学成分を微調整する精錬工程(S20)と、
精錬炉で精錬された溶鋼の出鋼温度を1560℃〜1590℃に制御して、精錬された溶鋼をタンディッシュに導入し、鋼型の予め保温しておく温度を200℃〜250℃に制御して鋳型鋳造し、自然冷却後に、離型する連続鋳型鋳造工程(S30)と、
鋳型鋳造工程後の冷却されたインゴットを加熱炉に入れて、1200℃の炉内温度で2時間〜4時間保温する加熱炉加熱工程(S50)と、
鋼スラブに対して熱間圧延処理を行い、そのうち、圧延開始温度が1050℃±50℃、圧延終了温度が850℃±50℃、圧延速度が8m/s〜10m/sに制御され、鋼スラブを熱間圧延処理後に、室温まで自然冷却する連続熱間圧延工程(S60)と、
熱間圧延丸鋼に対して連続冷間圧延を行い、異なった降伏強度及び伸びの需要に応じて、1時間保温してから、炉外で自然冷却処理を行う連続冷間圧延工程(S70)と、
を含むことを特徴とするNPR非磁性ロックボルト鋼材料の生産方法。 - 前記連続鋳型鋳造工程(S30)の後、且つ前記加熱炉加熱工程(S50)の前に、鋼スラブの表面検出方法に従って、鋼スラブの表面欠陥を検出する鋼スラブ検査工程(S40)をさらに含むことを特徴とする請求項3に記載の生産方法。
- 前記精錬炉は、LF精錬炉であることを特徴とする請求項3に記載の生産方法。
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