JP6235721B2 - 高張力二相ステンレス鋼の生産方法 - Google Patents
高張力二相ステンレス鋼の生産方法 Download PDFInfo
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- JP6235721B2 JP6235721B2 JP2016539168A JP2016539168A JP6235721B2 JP 6235721 B2 JP6235721 B2 JP 6235721B2 JP 2016539168 A JP2016539168 A JP 2016539168A JP 2016539168 A JP2016539168 A JP 2016539168A JP 6235721 B2 JP6235721 B2 JP 6235721B2
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- 229910001039 duplex stainless steel Inorganic materials 0.000 title claims description 34
- 238000004519 manufacturing process Methods 0.000 title claims description 8
- 229910001220 stainless steel Inorganic materials 0.000 claims description 28
- 238000000034 method Methods 0.000 claims description 24
- 238000005096 rolling process Methods 0.000 claims description 24
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 claims description 17
- 238000010438 heat treatment Methods 0.000 claims description 15
- 229910001566 austenite Inorganic materials 0.000 claims description 13
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims description 12
- 239000010935 stainless steel Substances 0.000 claims description 12
- 229910000859 α-Fe Inorganic materials 0.000 claims description 12
- 239000011651 chromium Substances 0.000 claims description 11
- 230000000694 effects Effects 0.000 claims description 10
- 239000011572 manganese Substances 0.000 claims description 10
- 239000010955 niobium Substances 0.000 claims description 10
- 229910000831 Steel Inorganic materials 0.000 claims description 9
- 239000010949 copper Substances 0.000 claims description 9
- 239000010959 steel Substances 0.000 claims description 9
- 239000010936 titanium Substances 0.000 claims description 8
- 229910052804 chromium Inorganic materials 0.000 claims description 7
- 229910052759 nickel Inorganic materials 0.000 claims description 7
- VYZAMTAEIAYCRO-UHFFFAOYSA-N Chromium Chemical compound [Cr] VYZAMTAEIAYCRO-UHFFFAOYSA-N 0.000 claims description 6
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims description 6
- 229910052799 carbon Inorganic materials 0.000 claims description 6
- 229910052748 manganese Inorganic materials 0.000 claims description 6
- 229910052757 nitrogen Inorganic materials 0.000 claims description 6
- 230000009466 transformation Effects 0.000 claims description 6
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 5
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims description 5
- PWHULOQIROXLJO-UHFFFAOYSA-N Manganese Chemical compound [Mn] PWHULOQIROXLJO-UHFFFAOYSA-N 0.000 claims description 5
- 229910052802 copper Inorganic materials 0.000 claims description 5
- 239000012535 impurity Substances 0.000 claims description 5
- 229910052758 niobium Inorganic materials 0.000 claims description 5
- GUCVJGMIXFAOAE-UHFFFAOYSA-N niobium atom Chemical compound [Nb] GUCVJGMIXFAOAE-UHFFFAOYSA-N 0.000 claims description 5
- 229910052710 silicon Inorganic materials 0.000 claims description 5
- ZOXJGFHDIHLPTG-UHFFFAOYSA-N Boron Chemical compound [B] ZOXJGFHDIHLPTG-UHFFFAOYSA-N 0.000 claims description 4
- ZOKXTWBITQBERF-UHFFFAOYSA-N Molybdenum Chemical compound [Mo] ZOKXTWBITQBERF-UHFFFAOYSA-N 0.000 claims description 4
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 claims description 4
- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical compound [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 claims description 4
- 229910052782 aluminium Inorganic materials 0.000 claims description 4
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims description 4
- 229910052796 boron Inorganic materials 0.000 claims description 4
- 239000010941 cobalt Substances 0.000 claims description 4
- 229910017052 cobalt Inorganic materials 0.000 claims description 4
- GUTLYIVDDKVIGB-UHFFFAOYSA-N cobalt atom Chemical compound [Co] GUTLYIVDDKVIGB-UHFFFAOYSA-N 0.000 claims description 4
- 229910052750 molybdenum Inorganic materials 0.000 claims description 4
- 239000011733 molybdenum Substances 0.000 claims description 4
- 239000010703 silicon Substances 0.000 claims description 4
- 229910052719 titanium Inorganic materials 0.000 claims description 4
- WFKWXMTUELFFGS-UHFFFAOYSA-N tungsten Chemical compound [W] WFKWXMTUELFFGS-UHFFFAOYSA-N 0.000 claims description 4
- 229910052721 tungsten Inorganic materials 0.000 claims description 4
- 239000010937 tungsten Substances 0.000 claims description 4
- LEONUFNNVUYDNQ-UHFFFAOYSA-N vanadium atom Chemical compound [V] LEONUFNNVUYDNQ-UHFFFAOYSA-N 0.000 claims description 4
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 claims description 2
- 229910052760 oxygen Inorganic materials 0.000 claims description 2
- 239000001301 oxygen Substances 0.000 claims description 2
- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 claims 1
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 claims 1
- 229910052698 phosphorus Inorganic materials 0.000 claims 1
- 239000011574 phosphorus Substances 0.000 claims 1
- 229910052717 sulfur Inorganic materials 0.000 claims 1
- 239000011593 sulfur Substances 0.000 claims 1
- 229910045601 alloy Inorganic materials 0.000 description 17
- 239000000956 alloy Substances 0.000 description 17
- 229910000963 austenitic stainless steel Inorganic materials 0.000 description 10
- 238000005482 strain hardening Methods 0.000 description 7
- 230000003628 erosive effect Effects 0.000 description 6
- 229910000734 martensite Inorganic materials 0.000 description 6
- 239000000463 material Substances 0.000 description 6
- 229910052751 metal Inorganic materials 0.000 description 6
- 239000002184 metal Substances 0.000 description 6
- 238000005097 cold rolling Methods 0.000 description 5
- 230000035882 stress Effects 0.000 description 4
- 238000010586 diagram Methods 0.000 description 3
- 230000032683 aging Effects 0.000 description 2
- 239000011575 calcium Substances 0.000 description 2
- 238000001816 cooling Methods 0.000 description 2
- 230000007797 corrosion Effects 0.000 description 2
- 238000005260 corrosion Methods 0.000 description 2
- 230000007423 decrease Effects 0.000 description 2
- 230000009977 dual effect Effects 0.000 description 2
- 239000002994 raw material Substances 0.000 description 2
- OYPRJOBELJOOCE-UHFFFAOYSA-N Calcium Chemical compound [Ca] OYPRJOBELJOOCE-UHFFFAOYSA-N 0.000 description 1
- 229910052684 Cerium Inorganic materials 0.000 description 1
- 239000000654 additive Substances 0.000 description 1
- 230000000996 additive effect Effects 0.000 description 1
- 238000000137 annealing Methods 0.000 description 1
- 229910052791 calcium Inorganic materials 0.000 description 1
- GWXLDORMOJMVQZ-UHFFFAOYSA-N cerium Chemical compound [Ce] GWXLDORMOJMVQZ-UHFFFAOYSA-N 0.000 description 1
- 239000013013 elastic material Substances 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 238000010791 quenching Methods 0.000 description 1
- 230000000171 quenching effect Effects 0.000 description 1
- 239000012925 reference material Substances 0.000 description 1
- 238000004804 winding Methods 0.000 description 1
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Description
Claims (14)
- 変形によるTRIP(変態誘起塑性)効果を有する高張力フェライト−オーステナイト二相ステンレス鋼の生産方法において、950〜1150℃の温度範囲で第1の熱処理を施した後に、前記フェライト−オーステナイト二相ステンレス鋼を少なくとも10%の圧延率で変形させて成形性を維持したままで少なくとも1000MPaの高レベル引張強度を得て、
前記変形後に第2の熱処理を100℃〜420℃の温度範囲内で1秒〜20分の間行い、降伏強度をさらに向上させることを特徴とする生産方法。 - 請求項1に記載の方法において、前記フェライト−オーステナイト二相ステンレス鋼の変形を20%の圧延率で行い、伸び(A 50 )を少なくとも15%にすることを特徴とする方法。
- 請求項1に記載の方法において、前記フェライト−オーステナイト二相ステンレス鋼の変形を40%の圧延率で行い、少なくとも1300MPaの引張強度レベルを得ることを特徴とする方法。
- 請求項3に記載の方法において、前記40%の圧延率でのフェライト−オーステナイト二相ステンレス鋼の変形では、前記伸び(A50)は少なくとも4.5%になることを特徴とする方法。
- 請求項1ないし4のいずれかに記載の方法において、変形の前(Rd50%(0%))および後(Rd50%(TR%))の疲労限度の比Rd50%(TR%)/Rd50%(0%)は1.2を超えることを特徴とする方法。
- 請求項1または2に記載の方法において、第2の熱処理を行うことによって、少なくとも15%の伸び(A50)を維持したままで強度をさらに向上させることを特徴とする方法。
- 請求項1ないし6のいずれかに記載の方法において、第2の熱処理を175℃〜250℃の温度範囲内で行うことを特徴とする方法。
- 請求項1ないし7のいずれかに記載の方法において、第2の熱処理は5分〜15分の間行うことを特徴とする方法。
- 請求項1ないし8のいずれかに記載の方法において、前記フェライト−オーステナイト二相ステンレス鋼の変形を調質圧延によって行うことを特徴とする方法。
- 請求項1ないし8のいずれかに記載の方法において、前記フェライト−オーステナイト二相ステンレス鋼の変形をテンションレベリングによって行うことを特徴とする方法。
- 請求項1ないし8のいずれかに記載の方法において、前記フェライト−オーステナイト二相ステンレス鋼の変形をローラレベリングによって行うことを特徴とする方法。
- 請求項1ないし8のいずれかに記載の方法において、前記フェライト−オーステナイト二相ステンレス鋼の変形を絞りによって行うことを特徴とする方法。
- 請求項1ないし12のいずれかに記載の方法において、前記フェライト−オーステナイト二相ステンレス鋼は、重量%で、0.05%未満の炭素(C)、0.2〜0.7%のケイ素(Si)、2〜5%のマンガン(Mn)、19〜20.5%のクロム(Cr)、0.8〜1.5%のニッケル(Ni)、0.6%未満のモリブデン(Mo)、1%未満の銅(Cu)、0.16〜0.26%の窒素(N)を含有し、C+Nの合計量は0.2〜0.29%、硫黄(S)は0.010重量%未満であり、リン(P)は0.040重量%未満でS+Pの合計量が0.04重量%未満になるようにし、酸素(O)の総量は100ppm未満であり、任意で添加元素、すなわち、0〜0.5%のタングステン(W)、0〜0.2%のニオブ(Nb)、0〜0.1%のチタン(Ti)、0〜0.2%のバナジウム(V)、0〜0.5%のコバルト(Co)、0〜50ppmのホウ素(B)および0〜0.04%のアルミニウム(Al)のうちの1以上を含有し、残部は鉄(Fe)およびステンレス鋼に発生する不可避不純物であることを特徴とする方法。
- 請求項1ないし12のいずれかに記載の方法において、前記フェライト−オーステナイト二相ステンレス鋼は、重量%で、0.05%未満の炭素(C)、0.2〜0.7%のケイ素(Si)、2〜5%のマンガン(Mn)、19〜20.5%のクロム(Cr)、0.8〜1.5%のニッケル(Ni)、0.6%未満のモリブデン(Mo)、1%未満の銅(Cu)、0.16〜0.26%の窒素(N)を含有し、任意で添加元素、すなわち、0〜0.5%のタングステン(W)、0〜0.2%のニオブ(Nb)、0〜0.1%のチタン(Ti)、0〜0.2%のバナジウム(V)、0〜0.5%のコバルト(Co)、0〜50ppmのホウ素(B)および0〜0.04%のアルミニウム(Al)のうちの1以上を含有し、残部は鉄(Fe)およびステンレス鋼に発生する不可避不純物であることを特徴とする方法。
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FI20145573A FI125527B (en) | 2014-06-17 | 2014-06-17 | METHOD FOR THE PRODUCTION OF HIGH-STRENGTH DUPLEX STAINLESS STEEL |
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