FIELD: metallurgy.
SUBSTANCE: procedure for fabrication of said steel sheet or steel sheet annealed upon galvanising consists in continuous hot-galvanising high strength steel sheet containing Si and Mn or C, Si and Mn. During galvanising there is ensured presence of oxides of Si of at least one type chosen from FeSiO3, FeSiO4, MnSiO3 and Mn2SiO4 on surface of steel or surface of division of steel sheet and electro-deposit. Also, oxides of SiO2 type should be present on internal side of steel sheet surface to form a zinc coated layer or a layer of electro-deposit out of alloy of zinc on high strength steel sheet; after zinc coating steel sheet is annealed. Steel sheet contains in wt %, C from 0.05 to 0.25 %, Si from 0.3 to 2.5 %, Mn from 1.5 to 2.8 %, P 0.03 % or less, S 0.2 % or less, Al from 0.005 to 0.5 %, N 0.0060 % or less, the rest is Fe and unavoidable impurities. At fabrication of the said steel sheet in a reduction furnace there is implemented equipment including a device for introduction of generation of gas containing CO2 at amount from 1 to 100 vol. %, the rest is N2, H2O, O2, CO2 and unavoidable impurities. The equipment controls potential of oxygen on surface of steel sheet in furnace.
EFFECT: production of high strength hot-galvanised sheet and high strength annealed after galvanising steel sheet of required appearance with excellent adhesion of electro-deposit, mouldability and resistance to corrosion.
22 cl, 6 dwg, 18 tbl, 10 ex
Title |
Year |
Author |
Number |
HIGH-STRENGTH HOT-DIP GALVANISED STEEL SHEET HAVING EXCELLENT RESISTANCE TO DELAYED FRACTURE, AND METHOD FOR PRODUCTION THEREOF |
2012 |
- Kavata, Khiroyuki
- Maruyama, Naoki
- Murasato, Akinobu
- Minami, Akinobu
- Yasui, Takesi
- Kuvayama, Takuya
- Ban, Khiroyuki
- Khiramatsu, Kaoru
|
RU2585889C2 |
HIGH-STRENGTH STEEL SHEET WITH MOLTEN ZINC COAT AND METHOD OF MANUFACTURE OF SUCH SHEET |
2004 |
- Ikematsu Eiti
- Tanaka Koki
- Khajasi Suniti
- Savada Khideaki
- Takakhasi Akira
- Khonda Kazukhiko
- Suekhiro Masaesi
- Takada Esikhisa
|
RU2312162C2 |
METHOD FOR PRODUCING COATED STEEL SHEET, GALVANIZED STEEL SHEET (EMBODIMENTS) AND APPLICATION OF GALVANIZED STEEL SHEET |
2021 |
- Jamwal, Ranbir Singh
- Ghassemi-Armaki, Hassan
- Chakraborty, Anirban
- Challa Venkatasurya, Pavan
|
RU2807620C1 |
HIGH-STRENGTH STEEL SHEET WITH HIGH PROOF/ULTIMATE FACTOR, HIGH-STRENGTH COLD-ROLLED STEEL SHEET WITH HIGH PROOF/ULTIMATE FACTOR, HIGH-STRENGTH GALVANISED STEEL SHEET WITH HIGH PROOF/ULTIMATE FACTOR, HIGH-STRENGTH DIP GALVANISED STEEL SHEET WITH HIGH PROOF/ULTIMATE FACTOR, HIGH-STRENGTH ANNEALED DIP GALVANISED STEEL SHEET WITH HIGH PROOF/ULTIMATE FACTOR, METHOD OF MANUFACTURE OF HIGH-STRENGTH COLD-ROLLED STEEL SHEET WITH HIGH PROOF/ULTIMATE FACTOR, METHOD OF MANUFACTURE OF HIGH-STRENGTH DIP GALVANISED STEEL SHEET WITH HIGH PROOF/ULTIMATE FACTOR, AND METHOD OF MANUFACTURE OF HIGH-STRENGTH ANNEALED DIP GALVANISED STEEL SHEET WITH HIGH PROOF/ULTIMATE FACTOR |
2012 |
- Kavasaki,Esijasu
- Khasehgava,Khirosi
- Kanehko,Sindziro
- Nagataki,Jasunobu
|
RU2531216C2 |
GALVANISED HOT DIPPING AND ALLOYED STEEL SHEET AND METHOD OF ITS MANUFACTURE |
2013 |
- Fudzita, Sosi
- Yamanaka, Sintaro
|
RU2635499C2 |
HIGH-STRENGTH STEEL SHEET GALVANISED BY HOT IMMERSION |
2012 |
- Jamanaka, Sintaro
- Fudzita, Sosi
- Sato, Koiti
|
RU2567960C1 |
HIGH-STRENGTH STEEL PLATE, STEEL PLATE WITH PROTECTIVE COATING APPLIED BY MELT DIPPING, AND STEEL PLATE WITH ALLOYED PROTECTIVE COATING, WHICH HAVE EXCELLENT FATIGUE PROPERTIES, ELONGATION CHARACTERISTICS AND IMPACT PROPERTIES, AND METHOD FOR OBTAINING ABOVE DESCRIBED STEEL PLATES |
2010 |
- Khajasi Kunio
- Tomokijo Tosimasa
- Fudzita Nobukhiro
- Matsutani Naoki
- Goto Koiti
|
RU2485202C1 |
HIGH-STRENGTH STEEL PLATE WITH EXCELLENT IMPACT STRENGTH, AND METHOD OF ITS MANUFACTURING, AND HIGH-STRENGTH GALVANISED STEEL PLATE, AND METHOD OF ITS MANUFACTURING |
2012 |
- Kavata, Khirojuki
- Marujama, Naoki
- Murasato, Akinobu
- Minami, Akinobu
- Khasegava, Khadzime
- Vakabajasi, Tisato
- Oki, Tsujosi
|
RU2573154C2 |
HIGH-STRENGTH DIP GALVANISED STEEL PLATE, HIGH STRENGTH, ALLOYED, DIP GALVANISED STEEL PLATE WITH SUPERIOR ABILITY FOR HEAT STRENGTHENING, AND METHOD OF THEIR MANUFACTURING |
2012 |
- Kavata, Khirojuki
- Marujama, Naoki
- Murasato, Akinobu
- Minami, Akinobu
- Jasui, Takesi
- Kuvajama, Takuja
- Ban, Khirojuki
- Khiramatsu, Kaoru
|
RU2574555C2 |
STEEL SHEET WITH HOT-DIP-GALVANISED PLY WITH EXCELLENT WETTING CAPACITY OF CLAD COAT AND COAT PLY ADHESION, AND METHOD OF ITS PRODUCTION |
2012 |
- Fudzita, Sosi
- Jamanaka, Sintaro
- Sato, Koiti
|
RU2584060C2 |