JP2021502481A - 溶融めっき鋼板 - Google Patents
溶融めっき鋼板 Download PDFInfo
- Publication number
- JP2021502481A JP2021502481A JP2020524816A JP2020524816A JP2021502481A JP 2021502481 A JP2021502481 A JP 2021502481A JP 2020524816 A JP2020524816 A JP 2020524816A JP 2020524816 A JP2020524816 A JP 2020524816A JP 2021502481 A JP2021502481 A JP 2021502481A
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- JP
- Japan
- Prior art keywords
- steel sheet
- hot
- dip galvanized
- temperature
- steel
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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- 229910001335 Galvanized steel Inorganic materials 0.000 title claims abstract description 27
- 239000008397 galvanized steel Substances 0.000 title claims abstract description 27
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 112
- 239000010959 steel Substances 0.000 claims abstract description 112
- 238000000137 annealing Methods 0.000 claims abstract description 24
- 239000011248 coating agent Substances 0.000 claims abstract description 24
- 238000000576 coating method Methods 0.000 claims abstract description 24
- 239000011701 zinc Substances 0.000 claims abstract description 21
- 229910052782 aluminium Inorganic materials 0.000 claims abstract description 20
- 229910052725 zinc Inorganic materials 0.000 claims abstract description 18
- HCHKCACWOHOZIP-UHFFFAOYSA-N Zinc Chemical compound [Zn] HCHKCACWOHOZIP-UHFFFAOYSA-N 0.000 claims abstract description 16
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims abstract description 16
- 238000004519 manufacturing process Methods 0.000 claims abstract description 15
- 238000001953 recrystallisation Methods 0.000 claims abstract description 12
- 238000005246 galvanizing Methods 0.000 claims abstract description 9
- 238000000034 method Methods 0.000 claims description 52
- 238000010438 heat treatment Methods 0.000 claims description 23
- 239000000203 mixture Substances 0.000 claims description 15
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims description 13
- 229910052710 silicon Inorganic materials 0.000 claims description 12
- 238000001816 cooling Methods 0.000 claims description 11
- 239000000126 substance Substances 0.000 claims description 11
- 229910001566 austenite Inorganic materials 0.000 claims description 10
- 229910000734 martensite Inorganic materials 0.000 claims description 10
- 239000011261 inert gas Substances 0.000 claims description 7
- 229910052742 iron Inorganic materials 0.000 claims description 7
- 238000002791 soaking Methods 0.000 claims description 6
- 229910000859 α-Fe Inorganic materials 0.000 claims description 6
- 229910004283 SiO 4 Inorganic materials 0.000 claims description 5
- 229910001563 bainite Inorganic materials 0.000 claims description 4
- 239000012535 impurity Substances 0.000 claims description 4
- 229910052797 bismuth Inorganic materials 0.000 claims description 2
- JCXGWMGPZLAOME-UHFFFAOYSA-N bismuth atom Chemical compound [Bi] JCXGWMGPZLAOME-UHFFFAOYSA-N 0.000 claims description 2
- 238000007670 refining Methods 0.000 claims description 2
- AMWRITDGCCNYAT-UHFFFAOYSA-L hydroxy(oxo)manganese;manganese Chemical compound [Mn].O[Mn]=O.O[Mn]=O AMWRITDGCCNYAT-UHFFFAOYSA-L 0.000 description 24
- 239000011572 manganese Substances 0.000 description 16
- 239000007789 gas Substances 0.000 description 13
- 229910052799 carbon Inorganic materials 0.000 description 9
- 239000010410 layer Substances 0.000 description 9
- 239000011651 chromium Substances 0.000 description 8
- 229910052748 manganese Inorganic materials 0.000 description 7
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 6
- 229910052804 chromium Inorganic materials 0.000 description 6
- 239000010955 niobium Substances 0.000 description 6
- 229910052698 phosphorus Inorganic materials 0.000 description 6
- 238000007747 plating Methods 0.000 description 6
- 229910052841 tephroite Inorganic materials 0.000 description 6
- 238000005275 alloying Methods 0.000 description 5
- 239000010949 copper Substances 0.000 description 5
- 229910052751 metal Inorganic materials 0.000 description 5
- 239000002184 metal Substances 0.000 description 5
- PXHVJJICTQNCMI-UHFFFAOYSA-N nickel Substances [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 description 5
- 239000010936 titanium Substances 0.000 description 5
- 238000011282 treatment Methods 0.000 description 5
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 4
- 229910052796 boron Inorganic materials 0.000 description 4
- 238000005097 cold rolling Methods 0.000 description 4
- 229910052802 copper Inorganic materials 0.000 description 4
- 230000000694 effects Effects 0.000 description 4
- UQSXHKLRYXJYBZ-UHFFFAOYSA-N iron oxide Inorganic materials [Fe]=O UQSXHKLRYXJYBZ-UHFFFAOYSA-N 0.000 description 4
- 229910052758 niobium Inorganic materials 0.000 description 4
- 239000010703 silicon Substances 0.000 description 4
- VYZAMTAEIAYCRO-UHFFFAOYSA-N Chromium Chemical compound [Cr] VYZAMTAEIAYCRO-UHFFFAOYSA-N 0.000 description 3
- PWHULOQIROXLJO-UHFFFAOYSA-N Manganese Chemical compound [Mn] PWHULOQIROXLJO-UHFFFAOYSA-N 0.000 description 3
- 230000015572 biosynthetic process Effects 0.000 description 3
- 229910052739 hydrogen Inorganic materials 0.000 description 3
- 229910052750 molybdenum Inorganic materials 0.000 description 3
- 229910052759 nickel Inorganic materials 0.000 description 3
- 229910052757 nitrogen Inorganic materials 0.000 description 3
- 238000005554 pickling Methods 0.000 description 3
- 239000002244 precipitate Substances 0.000 description 3
- 230000000717 retained effect Effects 0.000 description 3
- 229910052717 sulfur Inorganic materials 0.000 description 3
- 229910052719 titanium Inorganic materials 0.000 description 3
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 2
- VEXZGXHMUGYJMC-UHFFFAOYSA-N Hydrochloric acid Chemical compound Cl VEXZGXHMUGYJMC-UHFFFAOYSA-N 0.000 description 2
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 description 2
- ZOKXTWBITQBERF-UHFFFAOYSA-N Molybdenum Chemical compound [Mo] ZOKXTWBITQBERF-UHFFFAOYSA-N 0.000 description 2
- 230000000052 comparative effect Effects 0.000 description 2
- 230000007547 defect Effects 0.000 description 2
- 238000005098 hot rolling Methods 0.000 description 2
- 239000001257 hydrogen Substances 0.000 description 2
- 229910001338 liquidmetal Inorganic materials 0.000 description 2
- 238000001556 precipitation Methods 0.000 description 2
- 238000010926 purge Methods 0.000 description 2
- 238000005482 strain hardening Methods 0.000 description 2
- 238000005728 strengthening Methods 0.000 description 2
- 229910052720 vanadium Inorganic materials 0.000 description 2
- ZOXJGFHDIHLPTG-UHFFFAOYSA-N Boron Chemical compound [B] ZOXJGFHDIHLPTG-UHFFFAOYSA-N 0.000 description 1
- 229910019142 PO4 Inorganic materials 0.000 description 1
- 229910004298 SiO 2 Inorganic materials 0.000 description 1
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 1
- 229910006639 Si—Mn Inorganic materials 0.000 description 1
- 229910001035 Soft ferrite Inorganic materials 0.000 description 1
- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical compound [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 description 1
- 229910000797 Ultra-high-strength steel Inorganic materials 0.000 description 1
- 230000002411 adverse Effects 0.000 description 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- 239000010953 base metal Substances 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 229910001567 cementite Inorganic materials 0.000 description 1
- 239000002131 composite material Substances 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 239000013078 crystal Substances 0.000 description 1
- 229910021419 crystalline silicon Inorganic materials 0.000 description 1
- 238000005261 decarburization Methods 0.000 description 1
- 238000000354 decomposition reaction Methods 0.000 description 1
- 230000001934 delay Effects 0.000 description 1
- 230000009977 dual effect Effects 0.000 description 1
- 239000012467 final product Substances 0.000 description 1
- 238000009776 industrial production Methods 0.000 description 1
- 230000010354 integration Effects 0.000 description 1
- KSOKAHYVTMZFBJ-UHFFFAOYSA-N iron;methane Chemical compound C.[Fe].[Fe].[Fe] KSOKAHYVTMZFBJ-UHFFFAOYSA-N 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000011159 matrix material Substances 0.000 description 1
- 150000001247 metal acetylides Chemical class 0.000 description 1
- 239000011733 molybdenum Substances 0.000 description 1
- GUCVJGMIXFAOAE-UHFFFAOYSA-N niobium atom Chemical compound [Nb] GUCVJGMIXFAOAE-UHFFFAOYSA-N 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
- NBIIXXVUZAFLBC-UHFFFAOYSA-K phosphate Chemical compound [O-]P([O-])([O-])=O NBIIXXVUZAFLBC-UHFFFAOYSA-K 0.000 description 1
- 239000010452 phosphate Substances 0.000 description 1
- 238000004881 precipitation hardening Methods 0.000 description 1
- 238000005096 rolling process Methods 0.000 description 1
- 238000001275 scanning Auger electron spectroscopy Methods 0.000 description 1
- 238000004626 scanning electron microscopy Methods 0.000 description 1
- 238000005204 segregation Methods 0.000 description 1
- 230000035945 sensitivity Effects 0.000 description 1
- 229910052814 silicon oxide Inorganic materials 0.000 description 1
- 239000006104 solid solution Substances 0.000 description 1
- 230000006641 stabilisation Effects 0.000 description 1
- 238000011105 stabilization Methods 0.000 description 1
- 230000000087 stabilizing effect Effects 0.000 description 1
- 238000009628 steelmaking Methods 0.000 description 1
- 239000002344 surface layer Substances 0.000 description 1
- LEONUFNNVUYDNQ-UHFFFAOYSA-N vanadium atom Chemical compound [V] LEONUFNNVUYDNQ-UHFFFAOYSA-N 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B15/00—Layered products comprising a layer of metal
- B32B15/01—Layered products comprising a layer of metal all layers being exclusively metallic
- B32B15/013—Layered products comprising a layer of metal all layers being exclusively metallic one layer being formed of an iron alloy or steel, another layer being formed of a metal other than iron or aluminium
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- 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
- C21D9/00—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor
- C21D9/46—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor for sheet metals
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- B—PERFORMING OPERATIONS; TRANSPORTING
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- B32B15/00—Layered products comprising a layer of metal
- B32B15/01—Layered products comprising a layer of metal all layers being exclusively metallic
- B32B15/012—Layered products comprising a layer of metal all layers being exclusively metallic one layer being formed of an iron alloy or steel, another layer being formed of aluminium or an aluminium alloy
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- C—CHEMISTRY; METALLURGY
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- C21D1/74—Methods of treatment in inert gas, controlled atmosphere, vacuum or pulverulent material
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- C21D6/002—Heat treatment of ferrous alloys containing Cr
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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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- C23C2/00—Hot-dipping or immersion processes for applying the coating material in the molten state without affecting the shape; Apparatus therefor
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Abstract
Description
鋼を熱間圧延、酸洗及び冷間圧延に供すること、並びに溶融亜鉛めっき鋼板を製造するために、得られた鋼板を溶融亜鉛めっき処理に供することを含み、
前記熱間圧延において、スラブ加熱温度が1150〜1300℃に設定され、仕上げ圧延温度が850〜950℃に設定され、及び巻取温度が400〜600℃に設定され、
前記酸洗において、浴温度が10℃以上及び100℃未満に設定され、及び塩酸の濃度が1〜20%に設定され;並びに
前記溶融亜鉛めっき処理において、600℃以上への温度上昇過程から焼鈍温度を介した450℃への冷却過程までの熱処理炉内の雰囲気中の水素濃度が2〜20%に設定され、及び前記雰囲気の露点が−60〜−10℃に設定され、及び冷間圧延された鋼板が10〜500秒間、760〜860℃の焼鈍温度に保たれ、次いで、1〜30℃/秒の平均冷却速度で冷却される、
方法を開示する。
加熱温度Tが750℃以上及び1000℃以下であり、及び以下の式(2)を満たし、雰囲気気体の露点tが以下の式(3)を満たし、及び雰囲気気体の水素濃度が1〜100体積%である雰囲気中で加熱する工程と;並びに、次いで、溶融亜鉛めっきに供する工程と;
を含む方法:
0.85≦{[P(重量%)+(2/3)]*1150}/{T(℃)}≦1.15(2);
0.35≦{[P(重量%)+(2/3)]*(−30)}/{t(℃)}≦1.8(3)
を開示する。
1つは、焼鈍の間に、鋼板温度が650℃に達するときに、−10℃の露点を有する気体を用い、及び
もう1つは、焼鈍の間に、鋼板温度が850℃に達するときに、−60℃の低露点気体を有する気体を用いる。
「体積%」は、体積による百分率を意味し、
「重量%」は、重量による百分率を意味する。
本発明は、亜鉛又はアルミニウムをベースとする被膜を用いた溶融めっき鋼板被膜の製造方法であって、
A.重量%で以下の化学組成:
0.05≦C≦0.20%、
1.5≦Mn≦3.0%、
0.10≦Si≦0.45%、
0.10≦Cr≦0.60%、
Al≦0.20%、
V<0.005%
及び、純粋に任意に、
P<0.04%、
Nb≦0.05%、
B≦0.003%、
Mo≦0.20%、
Ni≦0.1%、
Ti≦0.06%、
S≦0.01%、
Cu≦0.1%、
Co≦0.1%、
N≦0.01%
などの1つ以上の元素を有し、
前記組成の残部が鉄及び精錬から生じる不可避の不純物作られる鋼板の提供、
B.以下のサブ工程と:
i.0.1〜15体積%のH2とその露点DP1が−18℃〜+8℃である不活性気体とを含む雰囲気A1を有する加熱区画中での、周囲温度から700〜900℃の温度T1への前記鋼板の加熱工程、
ii.DP1と等しい露点DP2を有する、A1と同一の雰囲気A2を有する均熱区画中での、T1から700〜900℃の温度T2への前記鋼板の均熱工程、
iii.1〜30体積%のH2とその露点DP3が−30℃以下である不活性気体とを含む雰囲気A3を有する冷却区画中での、T2から400〜700℃のT3への鋼板の冷却工程、
iv.1〜30体積%のH2とその露点DP4が−30℃以下である不活性気体とを含む雰囲気A4を有する均等化区画中での、温度T3から400〜700℃の温度T4への鋼板の任意に行われる均等化工程、
を含む、加熱区画、均熱区画、冷却区画、任意に均等化区画を備える完全ラジアントチューブ炉中での前記鋼板の再結晶焼鈍、並びに
C.亜鉛をベースとする又はアルミニウムをベースとする浴中での前記焼鈍された鋼板の溶融めっき、
を含む、方法に関する。
Claims (18)
- 亜鉛又はアルミニウムをベースとする被膜で被覆された溶融めっき鋼板の製造方法であって、
A.重量%で以下の化学組成:
0.05≦C≦0.20%、
1.5≦Mn≦3.0%、
0.10≦Si≦0.45%、
0.10≦Cr≦0.60%、
Al≦0.20%、
V<0.005%
及び、純粋に任意に、
P<0.04%、
Nb≦0.05%、
B≦0.003%、
Mo≦0.20%、
Ni≦0.1%、
Ti≦0.06%、
S≦0.01%、
Cu≦0.1%、
Co≦0.1%、
N≦0.01%
などの1つ以上の元素を有し、
前記組成の残部が鉄及び精錬から生じる不可避の不純物から作られる鋼板の提供、
B.以下のサブ工程:
i.0.1〜15体積%のH2とその露点DP1が−18℃〜+8℃である不活性気体とを含む雰囲気A1を有する加熱区画中での、周囲温度から700〜900℃の温度T1への前記鋼板の加熱工程、
ii.DP1と等しい露点DP2を有する、A1と同一の雰囲気A2を有する均熱区画中での、T1から700〜900℃の温度T2への前記鋼板の均熱工程、
iii.1〜30体積%のH2とその露点DP3が−30℃以下である不活性気体とを含む雰囲気A3を有する冷却区画中での、T2から400〜700℃のT3への鋼板の冷却工程、
iv.1〜30体積%のH2とその露点DP4が−30℃以下である不活性気体とを含む雰囲気A4を有する均等化区画中での、温度T3から400〜700℃の温度T4への鋼板の任意に行われる均等化工程、
を含む、加熱区画、均熱区画、冷却区画、任意に均等化区画を備える完全ラジアントチューブ炉中での前記鋼板の再結晶焼鈍、並びに
C.亜鉛をベースとする又はアルミニウムをベースとする浴中での前記焼鈍された鋼板の溶融めっき、
を含む、方法。 - 工程A)において、鋼板が0.30重量%未満のSiを含む、請求項1に記載の方法。
- 工程A)において、鋼板が0.0001重量%超のVを含む、請求項1又は2に記載の方法。
- 工程B.i)及びB.ii)において、A1が1〜10体積%のH2を含み、A2がA1と同一である、請求項1〜3のいずれか一項に記載の方法。
- 工程B.i)及びB.ii)において、DP1が−15℃〜+5℃であり、DP2がDP1と等しい、請求項1〜4のいずれか一項に記載の方法。
- 工程B.ii)において、T2がT1と等しい、請求項1〜5のいずれか一項に記載の方法。
- 工程B.i)及びB.ii)において、T1及びT2が750〜850℃である、請求項1〜6のいずれか一項に記載の方法。
- 工程B.iii)及びB.iv)において、A3がA4と同一であり、DP4がDP3と等しい、請求項1〜7のいずれか一項に記載の方法。
- 工程B.iv)において、T4がT3と等しい、請求項1〜8のいずれか一項に記載の方法。
- 工程B.i)〜B.iv)において、不活性気体が、N2、Ar、He及びXeから選択される、請求項1〜9のいずれか一項に記載の方法。
- 工程C)において、亜鉛をベースとする被膜が、0.01〜8.0重量%のAl、任意に0.2〜8.0重量%のMg、5.0%未満のFeを含み、残部はZnである、請求項1〜10のいずれか一項に記載の方法。
- アルミニウムをベースとする被膜が、15%未満のSi、5.0%未満のFe,任意に0.1〜8.0%のMg及び任意に0.1〜30.0%のZnを含み、残部はAlである、請求項1〜11のいずれか一項に記載の方法。
- 鋼の化学組成がビスマスを含まない、請求項1〜12のいずれか一項に記載の方法。
- 請求項1〜13のいずれか一項に記載の方法から得られる亜鉛又はアルミニウムをベースとする被膜で被覆された溶融めっき鋼板であって、亜鉛又はアルミニウムをベースとする被膜の下の鋼表面にFeO、Mn2SiO4及びMnOを含む外部酸化物、並びに鋼板中にFeO、Mn2SiO4及びMnOを含む内部酸化物を含む溶融めっき鋼板。
- 外部酸化物が、鋼板表面における小塊の形態である、請求項14に記載の溶融めっき鋼板。
- 鋼の微細組織が、ベイナイト、マルテンサイト、フェライト及び任意にオーステナイトを含む、請求項14又は15に記載の溶融めっき鋼板。
- 鋼板の表面が脱炭されている、請求項14〜16のいずれか一項に記載の溶融めっき鋼板。
- 自動車両の一部の製造のための、請求項14〜17のいずれか一項に記載の、又は請求項1〜13のいずれか一項に記載の方法から得られる溶融めっき鋼板の使用。
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CN111295460B (zh) | 2022-09-06 |
US12011902B2 (en) | 2024-06-18 |
UA125883C2 (uk) | 2022-06-29 |
ZA202002314B (en) | 2021-08-25 |
US20200338857A1 (en) | 2020-10-29 |
EP3707290A1 (en) | 2020-09-16 |
CA3081954C (en) | 2022-05-31 |
CA3081954A1 (en) | 2019-05-16 |
ES2902379T3 (es) | 2022-03-28 |
PL3707290T3 (pl) | 2022-03-07 |
CN111295460A (zh) | 2020-06-16 |
KR102374498B1 (ko) | 2022-03-15 |
MA54420A (fr) | 2020-09-16 |
BR112020006548B1 (pt) | 2023-03-21 |
JP7030187B2 (ja) | 2022-03-04 |
US20230158774A1 (en) | 2023-05-25 |
WO2019092526A1 (en) | 2019-05-16 |
WO2019092468A1 (en) | 2019-05-16 |
KR20200070292A (ko) | 2020-06-17 |
US11590734B2 (en) | 2023-02-28 |
EP3707290B1 (en) | 2021-12-01 |
BR112020006548A2 (pt) | 2020-10-13 |
RU2737371C1 (ru) | 2020-11-27 |
HUE056730T2 (hu) | 2022-03-28 |
MX2020004696A (es) | 2020-07-27 |
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