JP6700364B2 - 高い疲労強度および水素脆性に対する耐性を有する冷間圧延鋼線ならびに該鋼線が組み込まれる可撓性導管の補強 - Google Patents
高い疲労強度および水素脆性に対する耐性を有する冷間圧延鋼線ならびに該鋼線が組み込まれる可撓性導管の補強 Download PDFInfo
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- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 title description 8
- 229910052739 hydrogen Inorganic materials 0.000 title description 8
- 239000001257 hydrogen Substances 0.000 title description 8
- 239000010960 cold rolled steel Substances 0.000 title description 5
- 230000002787 reinforcement Effects 0.000 title description 2
- 229910000831 Steel Inorganic materials 0.000 claims description 46
- 239000010959 steel Substances 0.000 claims description 46
- 238000010438 heat treatment Methods 0.000 claims description 15
- 229910000859 α-Fe Inorganic materials 0.000 claims description 13
- 229910001563 bainite Inorganic materials 0.000 claims description 12
- 238000001816 cooling Methods 0.000 claims description 9
- 238000004519 manufacturing process Methods 0.000 claims description 8
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 6
- 229910001562 pearlite Inorganic materials 0.000 claims description 5
- 238000010791 quenching Methods 0.000 claims description 5
- 238000005491 wire drawing Methods 0.000 claims description 5
- 239000007864 aqueous solution Substances 0.000 claims description 4
- 238000005097 cold rolling Methods 0.000 claims description 4
- 229930195733 hydrocarbon Natural products 0.000 claims description 4
- 150000002430 hydrocarbons Chemical class 0.000 claims description 4
- 239000000203 mixture Substances 0.000 claims description 4
- 230000000171 quenching effect Effects 0.000 claims description 4
- 238000005452 bending Methods 0.000 claims description 3
- 238000005482 strain hardening Methods 0.000 claims description 3
- 238000000605 extraction Methods 0.000 claims description 2
- 238000007654 immersion Methods 0.000 claims description 2
- 230000006698 induction Effects 0.000 claims description 2
- 150000003839 salts Chemical class 0.000 claims description 2
- 239000000126 substance Substances 0.000 claims description 2
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims 2
- 239000004215 Carbon black (E152) Substances 0.000 claims 1
- 239000012535 impurity Substances 0.000 claims 1
- 229910052742 iron Inorganic materials 0.000 claims 1
- 239000010451 perlite Substances 0.000 description 8
- 238000012360 testing method Methods 0.000 description 8
- 238000000034 method Methods 0.000 description 7
- 235000019362 perlite Nutrition 0.000 description 7
- 239000007789 gas Substances 0.000 description 5
- 239000011651 chromium Substances 0.000 description 4
- 229910000734 martensite Inorganic materials 0.000 description 4
- VYZAMTAEIAYCRO-UHFFFAOYSA-N Chromium Chemical compound [Cr] VYZAMTAEIAYCRO-UHFFFAOYSA-N 0.000 description 3
- 230000015572 biosynthetic process Effects 0.000 description 3
- 229910052804 chromium Inorganic materials 0.000 description 3
- 238000005260 corrosion Methods 0.000 description 3
- 230000007797 corrosion Effects 0.000 description 3
- 239000011572 manganese Substances 0.000 description 3
- 229910052717 sulfur Inorganic materials 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
- PWHULOQIROXLJO-UHFFFAOYSA-N Manganese Chemical compound [Mn] PWHULOQIROXLJO-UHFFFAOYSA-N 0.000 description 2
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 2
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 description 2
- 230000002378 acidificating effect Effects 0.000 description 2
- 230000002411 adverse Effects 0.000 description 2
- 229910052799 carbon Inorganic materials 0.000 description 2
- 238000006243 chemical reaction Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 229910052748 manganese Inorganic materials 0.000 description 2
- 238000001000 micrograph Methods 0.000 description 2
- 239000003921 oil Substances 0.000 description 2
- 229910052710 silicon Inorganic materials 0.000 description 2
- 239000010703 silicon Substances 0.000 description 2
- 239000011593 sulfur Substances 0.000 description 2
- 229910000851 Alloy steel Inorganic materials 0.000 description 1
- DGAQECJNVWCQMB-PUAWFVPOSA-M Ilexoside XXIX Chemical compound C[C@@H]1CC[C@@]2(CC[C@@]3(C(=CC[C@H]4[C@]3(CC[C@@H]5[C@@]4(CC[C@@H](C5(C)C)OS(=O)(=O)[O-])C)C)[C@@H]2[C@]1(C)O)C)C(=O)O[C@H]6[C@@H]([C@H]([C@@H]([C@H](O6)CO)O)O)O.[Na+] DGAQECJNVWCQMB-PUAWFVPOSA-M 0.000 description 1
- 229910002651 NO3 Inorganic materials 0.000 description 1
- NHNBFGGVMKEFGY-UHFFFAOYSA-N Nitrate Chemical compound [O-][N+]([O-])=O NHNBFGGVMKEFGY-UHFFFAOYSA-N 0.000 description 1
- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 description 1
- AZFNGPAYDKGCRB-XCPIVNJJSA-M [(1s,2s)-2-amino-1,2-diphenylethyl]-(4-methylphenyl)sulfonylazanide;chlororuthenium(1+);1-methyl-4-propan-2-ylbenzene Chemical compound [Ru+]Cl.CC(C)C1=CC=C(C)C=C1.C1=CC(C)=CC=C1S(=O)(=O)[N-][C@@H](C=1C=CC=CC=1)[C@@H](N)C1=CC=CC=C1 AZFNGPAYDKGCRB-XCPIVNJJSA-M 0.000 description 1
- 229910045601 alloy Inorganic materials 0.000 description 1
- 239000000956 alloy Substances 0.000 description 1
- 238000005275 alloying Methods 0.000 description 1
- 238000000137 annealing Methods 0.000 description 1
- 229910002091 carbon monoxide Inorganic materials 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- 239000006185 dispersion Substances 0.000 description 1
- 230000000376 effect on fatigue Effects 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 238000005272 metallurgy Methods 0.000 description 1
- 229910052750 molybdenum Inorganic materials 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
- 229910052759 nickel Inorganic materials 0.000 description 1
- 229910052758 niobium Inorganic materials 0.000 description 1
- 239000010955 niobium Substances 0.000 description 1
- GUCVJGMIXFAOAE-UHFFFAOYSA-N niobium atom Chemical compound [Nb] GUCVJGMIXFAOAE-UHFFFAOYSA-N 0.000 description 1
- 150000004767 nitrides Chemical class 0.000 description 1
- 229910052757 nitrogen Inorganic materials 0.000 description 1
- 239000003208 petroleum Substances 0.000 description 1
- 229910052698 phosphorus Inorganic materials 0.000 description 1
- 239000011574 phosphorus Substances 0.000 description 1
- 229920000642 polymer Polymers 0.000 description 1
- 235000010289 potassium nitrite Nutrition 0.000 description 1
- 239000004304 potassium nitrite Substances 0.000 description 1
- 239000010970 precious metal Substances 0.000 description 1
- 238000005096 rolling process Methods 0.000 description 1
- 238000005204 segregation Methods 0.000 description 1
- 229910052708 sodium Inorganic materials 0.000 description 1
- 235000010288 sodium nitrite Nutrition 0.000 description 1
- LPXPTNMVRIOKMN-UHFFFAOYSA-M sodium nitrite Substances [Na+].[O-]N=O LPXPTNMVRIOKMN-UHFFFAOYSA-M 0.000 description 1
- 230000009466 transformation Effects 0.000 description 1
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- C—CHEMISTRY; METALLURGY
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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
- 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
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21C—MANUFACTURE OF METAL SHEETS, WIRE, RODS, TUBES OR PROFILES, OTHERWISE THAN BY ROLLING; AUXILIARY OPERATIONS USED IN CONNECTION WITH METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL
- B21C1/00—Manufacture of metal sheets, metal wire, metal rods, metal tubes by drawing
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21F—WORKING OR PROCESSING OF METAL WIRE
- B21F1/00—Bending wire other than coiling; Straightening wire
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- C21D1/18—Hardening; Quenching with or without subsequent tempering
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- C22C38/44—Ferrous alloys, e.g. steel alloys containing chromium with nickel with molybdenum or tungsten
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- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B17/00—Drilling rods or pipes; Flexible drill strings; Kellies; Drill collars; Sucker rods; Cables; Casings; Tubings
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- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Crystallography & Structural Chemistry (AREA)
- Manufacturing & Machinery (AREA)
- Health & Medical Sciences (AREA)
- Child & Adolescent Psychology (AREA)
- Life Sciences & Earth Sciences (AREA)
- Geology (AREA)
- Mining & Mineral Resources (AREA)
- Environmental & Geological Engineering (AREA)
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- Heat Treatment Of Strip Materials And Filament Materials (AREA)
Description
0.2≦C%≦0.6
0.5≦Mn%≦1.0
0.1≦Si≦0.5%
0.2≦Cr≦1.0%
P≦0.020%
S≦0.015%
N≦0.010%
ならびに場合により0.07%以下のAl、0.2%以下のNi、0.1%以下のMoおよび0.1%以下のCu
を含む。
− 直径が10mm以上である熱間圧延鋼線材を調達する工程、
− この線材を、950℃を超える温度でオーステナイト化の加熱処理に供する工程、次いで、
− 少なくとも50%のベイナイトならびに場合により35%までの針状フェライトおよび15%までのパーライトを含む構造を得るために、350から600℃の間の温度まで等温急冷することにより、この線材を冷却し、次いで30℃/秒から100℃/秒の間の冷却速度で周囲温度までの冷却を完了する工程、
− この冷却された線材を、少なくとも800MPaの機械的引張強度Rmを得るために、40から90%の間の総加工硬化率で行われる冷間機械変換操作に供する工程、次いで
− それを任意の応力緩和加熱処理に供する工程
からなる工程を含む。
− 線材が受けるオーステナイト化加熱処理は、好ましくはガス炉または誘導炉で、予め巻を解かれた鋼線に連続的に行われ、
− オーステナイト化加熱処理は、2から10分間の時間の長さで行われ、
− 線材は、溶融した、好ましくは鉛または塩(硝酸塩/亜硝酸ナトリウムまたはカリウムの混合物)をベースとする浴、または同じ元素の流動床内で等温急冷することにより冷却され、浸漬時間は好ましくは1から10分であり、好ましくはその後水により冷却し、
− 冷間機械変換操作は、伸線工程、その後冷間圧延工程を含み、伸線は、好ましくは、少なくとも15またはさらに20%の断面の減少を得るために行われ、冷間圧延は、好ましくは、少なくとも30%の厚みの減少を得るために行われ、
− 冷間機械変換操作は、少なくとも1000MPaの機械的引張強度Rmを得られるように実施され、その後機械的引張強度を800、あるいはさらに850または900MPa未満に低下させないために、応力緩和熱処理を実行する。
本発明の鋼線の性能を評価するために実施した試験は以下の条件で行われた。
鋼線を、650MPaの応力で、CO2および5ミリバールのH2Sを含むガスを泡立たせたpH4.1の水溶液に浸漬した。試験を30日にわたって行い、その終わりに内部亀裂の潜在的な存在を検査するために、超音波を使用して鋼線を試験した。
鋼線を、100MPaから500MPaの交番曲げ応力下で、CO2および5ミリバールまでのH2Sを含むガスを泡立たせたpH5の水溶液に浸漬した。鋼線が破損したときに試験を停止し、到達したサイクル数を記録した。
Claims (12)
- 重量パーセントで表される以下の化学組成:
0.2≦C%≦0.6
0.5≦Mn%≦1.0
0.1≦Si≦0.5%
0.2≦Cr≦1.0%
P≦0.020%
S≦0.015%
N≦0.010%
ならびに場合により0.07%以下のAl、0.2%以下のNi、0.1%以下のMoおよび0.1%以下のCuを有し、残部は鉄および不可避的不純物である、ことを特徴とする冷間で機械的に変形され、応力緩和された鋼線であって、この鋼線はベイナイトおよび35%までの針状フェライトおよび15%までのパーライトからなる微細構造を有する、冷間で機械的に変形され、応力緩和された鋼線。 - 鋼線を、650MPaの応力で、CO2および5ミリバールのH2Sを含むガスを泡立たせたpH4.1の水溶液に浸漬する環境に30日間曝露した後に内部亀裂を示さない請求項1に記載の冷間で機械的に変形され、応力緩和された鋼線。
- CO2および5ミリバールのH2Sを含むガスを泡立たせたpH5の水溶液に浸漬する環境中で+100から+500MPaの交番応力下で2百万回の曲げサイクル前に破損を示さない請求項1または2に記載の冷間で機械的に変形され、応力緩和された鋼線。
- 機械的引張強度Rmが900から1300MPaの間である請求項1から3のいずれか一項に記載の冷間で機械的に変形され、応力緩和された鋼線。
- 展性Aが10%以上である請求項1から4のいずれか一項に記載の冷間で機械的に変形され、応力緩和された鋼線。
- 以下の工程:
− 直径が10mm以上である熱間圧延鋼線材を調達する工程、
− この線材を950℃を超える温度でオーステナイト化の加熱処理に供する工程、次いで、
− 少なくとも50%のベイナイトならびに場合により35%までの針状フェライトおよび15%までのパーライトからなる構造を得るために、350から600℃の間の温度まで等温急冷することにより、この線材を冷却し、次いで30℃/秒から100℃/秒の間の冷却速度で室温までの冷却を完了する工程、
− この冷却された線材を、少なくとも800MPaの機械的引張強度Rmを得るために、40から90%の間の総加工硬化率で行われる冷間機械処理操作に供する工程、次いで
− それを応力緩和加熱処理に供する工程、
を含む請求項1から5のいずれか一項に記載の冷間で機械的に変形され、応力緩和された鋼線の製造方法。 - 線材が受けたオーステナイト化加熱処理がガス炉中でまたは誘導炉中で予め巻を解かれた鋼線に連続的に実施される請求項6に記載の製造方法。
- このオーステナイト化加熱処理が2から10分の時間の長さで実施される請求項6または7のいずれかに記載の製造方法。
- この線材が溶融鉛または塩ベースの浴中で等温急冷することにより冷却され、その浸漬時間は1から10分であり、その後水冷される請求項6から8のいずれか一項に記載の製造方法。
- この冷間機械処理操作が、冷間伸線操作、その後冷間圧延操作を含み、伸線は少なくとも15%の断面の減少を得るために行われ、冷間圧延は少なくとも30%の厚みの減少を得るために行われる請求項6から9のいずれか一項に記載の製造方法。
- この冷間機械処理操作が、少なくとも1000MPaの機械的引張強度Rmを得るために実施され、その後機械的引張強度を800MPa未満に低下させないために実行される応力緩和加熱処理が続く請求項6から10のいずれか一項に記載の製造方法。
- 請求項1から5のいずれか一項に記載の少なくとも1つの冷間で機械的に変形され、応力緩和された鋼線を含む炭化水素抽出分野のための可撓性導管。
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