JP2021523301A - 高強度両面ステンレス鋼クラッド板およびその製造方法 - Google Patents
高強度両面ステンレス鋼クラッド板およびその製造方法 Download PDFInfo
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- 229910001220 stainless steel Inorganic materials 0.000 title claims abstract description 134
- 239000010935 stainless steel Substances 0.000 title claims abstract description 132
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 30
- 239000000463 material Substances 0.000 claims abstract description 47
- 238000007711 solidification Methods 0.000 claims abstract description 27
- 230000008023 solidification Effects 0.000 claims abstract description 27
- 238000000034 method Methods 0.000 claims abstract description 19
- 229910052748 manganese Inorganic materials 0.000 claims abstract description 17
- 238000005554 pickling Methods 0.000 claims abstract description 14
- 238000000137 annealing Methods 0.000 claims abstract description 13
- 229910052729 chemical element Inorganic materials 0.000 claims abstract description 13
- 238000001816 cooling Methods 0.000 claims abstract description 13
- 229910052719 titanium Inorganic materials 0.000 claims abstract description 11
- 229910052782 aluminium Inorganic materials 0.000 claims abstract description 10
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims abstract description 8
- 229910052758 niobium Inorganic materials 0.000 claims abstract description 8
- 238000005096 rolling process Methods 0.000 claims abstract description 7
- 239000012535 impurity Substances 0.000 claims abstract description 6
- 229910052742 iron Inorganic materials 0.000 claims abstract description 4
- 229910000831 Steel Inorganic materials 0.000 claims description 27
- 239000010959 steel Substances 0.000 claims description 27
- 229910052799 carbon Inorganic materials 0.000 claims description 17
- 229910000859 α-Fe Inorganic materials 0.000 claims description 14
- 229910001563 bainite Inorganic materials 0.000 claims description 13
- 239000013078 crystal Substances 0.000 claims description 13
- 229910052710 silicon Inorganic materials 0.000 claims description 11
- 229910001562 pearlite Inorganic materials 0.000 claims description 10
- 229910000963 austenitic stainless steel Inorganic materials 0.000 claims description 8
- 238000005097 cold rolling Methods 0.000 claims description 4
- 229910003296 Ni-Mo Inorganic materials 0.000 claims description 2
- 238000010586 diagram Methods 0.000 abstract 1
- 239000000758 substrate Substances 0.000 description 50
- 239000011572 manganese Substances 0.000 description 20
- 239000000243 solution Substances 0.000 description 16
- 239000002131 composite material Substances 0.000 description 12
- 239000010936 titanium Substances 0.000 description 12
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 11
- 239000000203 mixture Substances 0.000 description 10
- 238000005260 corrosion Methods 0.000 description 9
- 230000007797 corrosion Effects 0.000 description 9
- PWHULOQIROXLJO-UHFFFAOYSA-N Manganese Chemical compound [Mn] PWHULOQIROXLJO-UHFFFAOYSA-N 0.000 description 7
- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical compound [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 description 7
- 229910001566 austenite Inorganic materials 0.000 description 7
- 230000000052 comparative effect Effects 0.000 description 7
- 239000010955 niobium Substances 0.000 description 7
- 229910052757 nitrogen Inorganic materials 0.000 description 7
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 6
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 6
- 229910052717 sulfur Inorganic materials 0.000 description 6
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 5
- 150000001247 metal acetylides Chemical class 0.000 description 5
- 229910052698 phosphorus Inorganic materials 0.000 description 5
- 238000010791 quenching Methods 0.000 description 5
- 230000000171 quenching effect Effects 0.000 description 5
- 239000010703 silicon Substances 0.000 description 5
- 230000007704 transition Effects 0.000 description 5
- 229910052804 chromium Inorganic materials 0.000 description 4
- 239000011651 chromium Substances 0.000 description 4
- 238000010438 heat treatment Methods 0.000 description 4
- GUCVJGMIXFAOAE-UHFFFAOYSA-N niobium atom Chemical compound [Nb] GUCVJGMIXFAOAE-UHFFFAOYSA-N 0.000 description 4
- 239000002244 precipitate Substances 0.000 description 4
- 238000001953 recrystallisation Methods 0.000 description 4
- 229910000975 Carbon steel Inorganic materials 0.000 description 3
- ATJFFYVFTNAWJD-UHFFFAOYSA-N Tin Chemical compound [Sn] ATJFFYVFTNAWJD-UHFFFAOYSA-N 0.000 description 3
- 229910045601 alloy Inorganic materials 0.000 description 3
- 239000000956 alloy Substances 0.000 description 3
- 239000010962 carbon steel Substances 0.000 description 3
- 238000013461 design Methods 0.000 description 3
- 238000009792 diffusion process Methods 0.000 description 3
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- 229910000734 martensite Inorganic materials 0.000 description 3
- 239000000047 product Substances 0.000 description 3
- 238000003860 storage Methods 0.000 description 3
- 238000003466 welding Methods 0.000 description 3
- VYZAMTAEIAYCRO-UHFFFAOYSA-N Chromium Chemical compound [Cr] VYZAMTAEIAYCRO-UHFFFAOYSA-N 0.000 description 2
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 2
- 238000011109 contamination Methods 0.000 description 2
- 238000009749 continuous casting Methods 0.000 description 2
- 238000005520 cutting process Methods 0.000 description 2
- 230000001627 detrimental effect Effects 0.000 description 2
- 238000005098 hot rolling Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 229910052759 nickel Inorganic materials 0.000 description 2
- 230000001376 precipitating effect Effects 0.000 description 2
- 239000002994 raw material Substances 0.000 description 2
- 239000006104 solid solution Substances 0.000 description 2
- 238000009628 steelmaking Methods 0.000 description 2
- 239000011593 sulfur Substances 0.000 description 2
- 239000010963 304 stainless steel Substances 0.000 description 1
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 description 1
- 229910001209 Low-carbon steel Inorganic materials 0.000 description 1
- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 description 1
- 229910000589 SAE 304 stainless steel Inorganic materials 0.000 description 1
- UCKMPCXJQFINFW-UHFFFAOYSA-N Sulphide Chemical compound [S-2] UCKMPCXJQFINFW-UHFFFAOYSA-N 0.000 description 1
- 238000005299 abrasion Methods 0.000 description 1
- 238000005275 alloying Methods 0.000 description 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- 238000005422 blasting Methods 0.000 description 1
- 238000004364 calculation method Methods 0.000 description 1
- 125000004432 carbon atom Chemical group C* 0.000 description 1
- 238000005253 cladding Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 230000002950 deficient Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 229910052739 hydrogen Inorganic materials 0.000 description 1
- 239000001257 hydrogen Substances 0.000 description 1
- 238000005304 joining Methods 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 230000000149 penetrating effect Effects 0.000 description 1
- 239000011574 phosphorus Substances 0.000 description 1
- 238000001556 precipitation Methods 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 238000005728 strengthening Methods 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- CADICXFYUNYKGD-UHFFFAOYSA-N sulfanylidenemanganese Chemical compound [Mn]=S CADICXFYUNYKGD-UHFFFAOYSA-N 0.000 description 1
- 230000003746 surface roughness Effects 0.000 description 1
- 238000010998 test method Methods 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
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Abstract
【選択図】 図1
Description
(1)基材層と、ステンレス鋼クラッド層とを得るステップであって、基材層が、質量パーセントでC:0.03〜0.12%、0<Si≦0.30%、Mn:0.2〜1.0%、Al:0.02〜0.04%、Ti:0.01〜0.03%、Nb:0.005〜0.020%、およびN:0.003〜0.006%の化学元素と、鉄およびその他の不可避的な不純物である残部とを含む、ステップと、
(2)ビレット製造するステップと、
(3)クラッド圧延するステップと、
(4)固溶化焼鈍および酸洗処理するステップであり、固溶化温度を950〜1020℃になるように制御し、次いで、20〜50℃/sの平均冷却速度で室温まで冷却するステップと、
を含む、上述の高強度両面ステンレス鋼クラッド板の製造方法を提案する。
(5)冷間圧延するステップと、
(6)固溶化焼鈍、酸洗、およびレベリング処理するステップであり、固溶化温度を950〜1020℃になるように制御し、次いで、20〜50℃/sの平均冷却速度で室温まで冷却するステップと、
をさらに含む。
表1-1および表1-2に、実施例1〜8および比較例1の高強度両面ステンレス鋼クラッド板の基材層中の各化学元素の質量パーセントおよびステンレス鋼クラッド層のモデルを挙げる。
Claims (12)
- 基材層と、前記基材層の両面にクラッド圧延されたステンレス鋼クラッド層とを含む、ことを特徴とする高強度両面ステンレス鋼クラッド板であって、
前記基材層が、質量パーセントでC:0.03〜0.12%、0<Si≦0.30%、Mn:0.2〜1.0%、Al:0.02〜0.04%、Ti:0.01〜0.03%、Nb:0.005〜0.020%、およびN:0.003〜0.006%の化学元素と、鉄およびその他の不可避的な不純物である残部とからなる、高強度両面ステンレス鋼クラッド板。 - 前記基材層中の前記化学元素が、2.7×C+0.4×Si+Mn≦1.25(式中、C、SiおよびMnは、それぞれ質量パーセントを表す)も満たす、請求項1に記載の高強度両面ステンレス鋼クラッド板。
- 前記基材層のミクロ組織が、フェライト+パーライト+ベイナイト、またはフェライト+パーライト+ベイナイト+ウィドマンステッテンであり、前記ベイナイトの相割合が20%以下であり、かつ前記ウィドマンステッテンの相割合が10%以下である、請求項1に記載の高強度両面ステンレス鋼クラッド板。
- 前記基材層の前記ミクロ組織中の前記フェライトが、7番以上の結晶粒度番号を有する、請求項1に記載の高強度両面ステンレス鋼クラッド板。
- 室温での耐力300Mpa〜420Mpaと、室温での伸び率30%〜48%と、機械的伸張中の降伏プラットホームの値2.0%以下とを有する、請求項1に記載の高強度両面ステンレス鋼クラッド板。
- 前記ステンレス鋼クラッド層が、オーステナイト系ステンレス鋼クラッド層である、請求項1に記載の高強度両面ステンレス鋼クラッド板。
- オーステナイト系ステンレス鋼が、Cr−Ni基ステンレス鋼またはCr−Ni−Mo基ステンレス鋼である、請求項6に記載の高強度両面ステンレス鋼クラッド板。
- 前記両面のステンレス鋼クラッド層の総厚が、板の全厚の10%〜30%を占め、前記基材層の上面および下面の前記ステンレス鋼クラッド層が、厚さが対称または非対称になるように設定されている、請求項1に記載の高強度両面ステンレス鋼クラッド板。
- 請求項1から8のいずれか1項に記載の高強度両面ステンレス鋼クラッド板の製造方法であって、
(1)基材層と、ステンレス鋼クラッド層とを得るステップと、
(2)ビレット製造するステップと、
(3)クラッド圧延するステップと、
(4)固溶化焼鈍および酸洗処理するステップであり、固溶化温度を950〜1020℃になるように制御し、次いで、20〜50℃/sの平均冷却速度で室温まで冷却するステップと、
を含む、製造方法。 - 前記ステップ(4)における前記平均冷却速度が20〜35℃/sである、請求項9に記載の製造方法。
- (5)冷間圧延するステップと、
(6)固溶化焼鈍、酸洗およびレベリング処理するステップであり、前記固溶化温度を950〜1020℃になるように制御し、次いで、20〜50℃/sの平均冷却速度で室温まで冷却するステップと、
をさらに含む、請求項9に記載の製造方法。 - 前記ステップ(6)における前記固溶化温度が950〜1000℃である、請求項11に記載の製造方法。
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