WO2017111533A1 - 도금 밀착성이 우수한 고망간 용융 알루미늄계 도금강판 - Google Patents
도금 밀착성이 우수한 고망간 용융 알루미늄계 도금강판 Download PDFInfo
- Publication number
- WO2017111533A1 WO2017111533A1 PCT/KR2016/015171 KR2016015171W WO2017111533A1 WO 2017111533 A1 WO2017111533 A1 WO 2017111533A1 KR 2016015171 W KR2016015171 W KR 2016015171W WO 2017111533 A1 WO2017111533 A1 WO 2017111533A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- steel sheet
- weight
- content
- aluminum
- alloy layer
- Prior art date
Links
Images
Classifications
-
- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
- C23C2/00—Hot-dipping or immersion processes for applying the coating material in the molten state without affecting the shape; Apparatus therefor
- C23C2/04—Hot-dipping or immersion processes for applying the coating material in the molten state without affecting the shape; Apparatus therefor characterised by the coating material
- C23C2/12—Aluminium or alloys based thereon
-
- 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
- B32B15/012—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
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/002—Ferrous alloys, e.g. steel alloys containing In, Mg, or other elements not provided for in one single group C22C38/001 - C22C38/60
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/008—Ferrous alloys, e.g. steel alloys containing tin
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/02—Ferrous alloys, e.g. steel alloys containing silicon
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/04—Ferrous alloys, e.g. steel alloys containing manganese
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/06—Ferrous alloys, e.g. steel alloys containing aluminium
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/12—Ferrous alloys, e.g. steel alloys containing tungsten, tantalum, molybdenum, vanadium, or niobium
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/14—Ferrous alloys, e.g. steel alloys containing titanium or zirconium
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
- C22C38/22—Ferrous alloys, e.g. steel alloys containing chromium with molybdenum or tungsten
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
- C22C38/24—Ferrous alloys, e.g. steel alloys containing chromium with vanadium
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
- C22C38/26—Ferrous alloys, e.g. steel alloys containing chromium with niobium or tantalum
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
- C22C38/28—Ferrous alloys, e.g. steel alloys containing chromium with titanium or zirconium
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
- C22C38/32—Ferrous alloys, e.g. steel alloys containing chromium with boron
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
- C22C38/38—Ferrous alloys, e.g. steel alloys containing chromium with more than 1.5% by weight of manganese
-
- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
- C23C2/00—Hot-dipping or immersion processes for applying the coating material in the molten state without affecting the shape; Apparatus therefor
- C23C2/26—After-treatment
- C23C2/261—After-treatment in a gas atmosphere, e.g. inert or reducing atmosphere
-
- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
- C23C2/00—Hot-dipping or immersion processes for applying the coating material in the molten state without affecting the shape; Apparatus therefor
- C23C2/26—After-treatment
- C23C2/28—Thermal after-treatment, e.g. treatment in oil bath
- C23C2/29—Cooling or quenching
-
- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
- C23C2/00—Hot-dipping or immersion processes for applying the coating material in the molten state without affecting the shape; Apparatus therefor
- C23C2/34—Hot-dipping or immersion processes for applying the coating material in the molten state without affecting the shape; Apparatus therefor characterised by the shape of the material to be treated
- C23C2/36—Elongated material
- C23C2/40—Plates; Strips
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T428/00—Stock material or miscellaneous articles
- Y10T428/12—All metal or with adjacent metals
- Y10T428/12493—Composite; i.e., plural, adjacent, spatially distinct metal components [e.g., layers, joint, etc.]
- Y10T428/12736—Al-base component
- Y10T428/1275—Next to Group VIII or IB metal-base component
- Y10T428/12757—Fe
Definitions
- the present invention relates to a high manganese hot-dip aluminum-based plated steel sheet excellent in plating adhesion.
- manganese is an element with a high tendency to ionize
- the steel is high in the content of manganese corrosion proceeds faster than the general steel.
- metal plating is an effective way to protect steel.
- Zinc-based hot-dip galvanized steel sheet is known as a metal plating for imparting corrosion resistance to high manganese steel, for example, Korean Laid-Open Patent Publication No. 2007-0067593, hot-dip galvanized layer or alloyed melting on a steel sheet containing a large amount of manganese Disclosed is a plated steel sheet in which a galvanized layer is formed to improve corrosion resistance.
- Korean Laid-Open Patent Publication No. 2012-0048399 discloses a technique for forming an Mn-Ni-Fe-Al-Si-Zn alloy phase to improve the plating adhesion of a base steel sheet containing a large amount of manganese.
- One of several objects of the present invention is to provide a high manganese molten aluminum-based plated steel sheet excellent in plating adhesion.
- Mn 5 to 35%
- Al 0.3 to 6%
- Si 0.1 to 1.2%
- a molten aluminum-based plating layer containing Si: 3 to 12%, balance Al and inevitable impurities, in a weight%, and a Fe-Al-Si-Mn-based alloy at an interface between the base steel sheet and the molten aluminum-based plating layer.
- An alloy layer comprising a phase and having a thickness of 0.1 to 10 ⁇ m, wherein the alloy layer is in weight percent, Al: 40 to 70%, Si: 2 to 13%, Mn: 3 to 9%, balance Fe and Provided is a high manganese hot-dip aluminum-based plated steel sheet containing inevitable impurities.
- the high manganese molten aluminum-based plated steel sheet according to an embodiment of the present invention has an advantage of excellent plating adhesion.
- FIG. 1 is a photograph of a high-manganese hot-dip aluminum-based plated steel sheet according to an embodiment of the present invention, the cross section is observed by a scanning electron microscope (FE-SEM).
- FE-SEM scanning electron microscope
- FIG. 1 is a photograph of a molten aluminum-based plated steel sheet according to an embodiment of the present invention, the cross section is observed by a scanning electron microscope (FE-SEM, Field Emission Scanning Electron Microscope).
- a molten aluminum-based plated steel sheet according to an embodiment of the present invention includes a base steel plate 10, an alloy layer 20, and a molten aluminum-based plated layer 30 in sequence.
- the base steel sheet 10 includes, by weight, Mn: 5 to 35%, Al: 0.3 to 6%, Si: 0.1 to 1.2%, balance Fe, and inevitable impurities.
- Manganese is an essential element that stabilizes the austenite structure so that twins are organic during plastic deformation, thereby improving the strength of the steel and dramatically improving the ductility.
- the upper limit of the manganese content is preferably 35% by weight, more preferably 18% by weight.
- Aluminum is usually an element added for deoxidation of steel, but in the present invention, it is an element added for improving ductility of steel. That is, aluminum improves the ductility of the steel by increasing the stacking fault energy at the slip side of the steel, thereby suppressing the generation of ⁇ -martensite structure. If the aluminum content is too low, the ⁇ -martensite structure is formed to increase the strength but the ductility may be sharply lowered. Therefore, it is preferable to contain 0.3 weight% or more of Al, and it is more preferable to contain 1.0 weight% or more of Al. However, when the content is excessive, not only decreases ductility and continuous castability by inhibiting twin generation, but also causes severe surface oxidation during hot rolling, which may lower the surface quality of the product.
- the upper limit of aluminum content is 6 weight%, It is more preferable that it is 4.5 weight%, It is still more preferable that it is 3.5 weight%.
- silicon is known to form a silicon oxide layer on the surface when added in a large amount of steel to inhibit the hot-dipability.
- a suitable amount of silicon when a suitable amount of silicon is included, a thin silicon oxide layer is formed on the surface to suppress the oxidation of manganese, thereby preventing formation of a thick manganese oxide layer formed after cold rolling. It is possible to improve the surface quality by preventing corrosion that proceeds in the cold rolled steel sheet after annealing. In addition, due to the effect of inhibiting the formation of manganese oxide layer, it is possible to greatly improve the hot dip plating characteristics.
- the upper limit of the silicon content is preferably 1.2%.
- the content of Al and Si contained in the steel sheet may satisfy the following relation 1. If the value of [Al] b / [Si] b is too low, workability may deteriorate due to the presence of Si oxides at the interface and the presence of a large amount of Si and Si-based phases vulnerable to processing. Therefore, the value of [Al] b / [Si] b is preferably controlled to 1.0 or more, and 2.5. It is more preferable to control above. On the other hand, when the value of [Al] b / [Si] b is too high, the Fe-Al-based alloy phase is excessively developed, and workability and plating adhesion may deteriorate due to the formation of brittle intermetallic compounds. Therefore, the value of [Al] b / [Si] b is preferably controlled to 10 or less, and more preferably to 7 or less.
- the content of Mn, Al and Si contained in the base steel sheet may satisfy the following relation 2. If, if the value of [Mn] b / ([Al] b + [Si] b ) is too low, Al and / or Si oxides are concentrated on the surface, deteriorating the wettability of the hot dip, and forming a desired alloy layer. This difficulty is likely to deteriorate the workability. Therefore, it is preferable to control [Mn] b / ([Al] b + [Si] b ) value to 5.0 or more, and to control to 6.0 or more.
- the value of [Mn] b / ([Al] b + [Si] b ) is preferably controlled to 12.0 or less, and more preferably to 10.0 or less.
- the steel sheet 10 is in weight percent, C: 0.3 ⁇ 0.9%, Ti: 0.01 ⁇ 0.5%, V: 0.05 ⁇ 0.5%, B: 0.0005 ⁇ 0.0050%, Cr: 0.01 ⁇ 0.5%, Mo: 0.01 ⁇ 0.5%, Nb: 0.01 ⁇ 0.05% and Sn: may be further included one or more selected from the group consisting of 0.01 to 0.1%.
- Titanium is a strong carbide forming element that combines with C to form carbides, and the carbides thus formed effectively inhibit grain growth, thereby effectively refining grain size. If the titanium content is less than 0.01%, the grains may grow excessively and the grain size may be coarse. On the other hand, if the titanium content exceeds 0.5%, titanium may be segregated at the grain boundaries, causing grain embrittlement.
- Vanadium is a strong carbide forming element that combines with C to form carbides, such as Ti, Nb, etc., and forms a fine precipitated phase at low temperature, thereby strengthening precipitation. If the vanadium content is less than 0.05%, there is a concern that the precipitation strengthening effect is lowered, so that an effective strength increase may not be obtained. On the other hand, if the vanadium content is less than 0.05%, the precipitation phase may be excessively coarsened to decrease the grain growth effect. have.
- Boron dissolves in columnar grain boundaries above 1,000 ° C, and serves to strengthen columnar grain boundaries by suppressing the generation and movement of hollow holes. If the boron content is less than 0.0005%, the grain boundary strengthening effect may be insignificant or absent. On the other hand, if the boron content is less than 0.0005%, the amount of carbide or nitride that acts as a precipitation nucleus of the amorphous primary aluminum may be large. There exists a possibility of promoting precipitation of primary aluminum.
- Chromium suppresses the formation of the ⁇ '-martensite phase on the steel surface during hot rolling, and serves to improve the workability of the steel. If the chromium content is less than 0.01%, the hot workability may deteriorate. On the other hand, if the content of the chromium is more than 0.5%, increasing the content of chromium that acts as a ferrite stabilizing element promotes formation of the ⁇ '-martensite phase. There is a risk of deteriorating the ductility of the lecture.
- Molybdenum is added to improve secondary work brittleness and plating property. If the molybdenum content is less than 0.01%, there is a fear of causing secondary processing brittleness, on the other hand, if it exceeds 0.5%, not only the improvement effect is reduced but also the cost may increase.
- Niobium is a strong carbide forming element that combines with C to form carbides, and these carbides are effective for miniaturizing grain size by preventing the growth of grains. If the niobium content is less than 0.01%, the grains may be coarsened and the precipitation strengthening effect may not be obtained. On the other hand, if the niobium content is more than 0.05%, the precipitate phase may be excessively coarsened to lower the growth effect of the grains. .
- tin Since tin does not itself form an oxide film at a high temperature, it precipitates on the surface of the substrate during annealing before hot dip plating, thereby suppressing diffusion of oxidative elements such as Al, Si, and Mn onto the surface to form oxides, thereby improving plating properties. Play a role. If the tin content is less than 0.01%, the plating wettability may be deteriorated and unplating or plating failure may occur. On the other hand, if the tin content is more than 0.1%, hot brittleness may be generated to inhibit hot workability.
- the aluminum plating layer 30 is formed on the surface of the base steel sheet, thereby contributing to the improvement of the corrosion resistance of the steel sheet.
- the composition of the aluminum plating layer is not particularly limited, and may be a pure aluminum plating layer or an aluminum alloy plating layer containing Si, Mg, or the like.
- the types of elements that can be included in the aluminum-based alloy plating layer and their content ranges will be described in detail.
- the content of Si is preferably 3 to 12% by weight.
- Mg metal-based corrosion resistance
- the addition of Mg also helps to reduce unplated generation.
- it is preferable that it is 0.1-10 weight%, and, as for content of Mg, it is more preferable that it is 4-8 weight%.
- These elements form a thin passivation film on the surface of the plating layer, thereby suppressing surface reactions and suppressing reactions with surrounding corrosion-inducing electrolytic materials, thereby further improving the corrosion resistance of the plated steel sheet.
- the content is excessive, it is advantageous in terms of corrosion resistance, but may cause plating defects by causing a large amount of dross in the plating bath during plating.
- the alloy layer 20 is formed at the interface between the base steel sheet 10 and the molten aluminum plating layer 30 to contribute to the improvement of plating adhesion.
- the alloy layer 20 includes a Fe-Al-Si-Mn-based alloy phase, and in weight percent, Al: 40 to 70%, Si: 2 to 13%, Mn: 3 to 9%, balance Fe and inevitable impurities It includes.
- Al contained in the alloy layer contributes to the improvement of workability of the plated steel sheet and the uniformity of the alloy layer. If the content is too low, since the uniformity of the alloy layer may be degraded, it is preferable to include 40% by weight or more. However, if the content is too high, the workability of the plated steel sheet may be deteriorated, it is preferably included in 70% by weight or less.
- Si contained in the alloy layer suppresses excessive growth of the alloy layer and contributes to improving workability of the plated steel sheet by suppressing the reaction between Fe and Al.
- the content is excessive, the effect is not only saturated, but there is a possibility that the weldability may be deteriorated.
- Mn contained in the alloy layer contributes to improving workability of the plated steel sheet.
- an alloy phase presumed to be R- or nu-based containing excessive Mn and Si is formed on a phase that is unfavorable for processing in the alloy layer, for example, a Fe-Al-Mn-Si composite alloy. do. Therefore, it is preferable that the upper limit of the content is 9 weight%.
- the alloy layer may include Fe and unavoidable impurities, in addition to Al, Si, and Mn, whose contents are defined.
- the impurities may include all defined components included in steels other than Al, Si, and Mn, inevitable impurities included in steel, and inevitable impurities included in plating.
- the alloy layer 20 may further include Mg of 1% or less (excluding 0%) by weight.
- Mg contained in the alloy layer may also contribute to improving the corrosion resistance of the plated steel sheet.
- the upper limit of the Mg content is limited to 1% by weight.
- the alloy layer 20 may have a thickness of 0.1 ⁇ 10 ⁇ m. If the thickness of the alloy layer is too thin, it may be difficult to secure sufficient adhesion between the base steel sheet and the plating layer. Therefore, the lower limit of the thickness of the alloy layer can be limited to 0.1 ⁇ m in terms of ensuring sufficient adhesion between the base steel sheet and the plating layer, and more preferably, 3 ⁇ m. However, if the thickness is too thick, workability of the plated steel sheet may be degraded. Therefore, the upper limit of the thickness of the alloy layer in terms of preventing this may be limited to 10 ⁇ m, more preferably, 7 ⁇ m.
- the thickness of the alloy layer may satisfy the following equation 3. If the thickness of the alloy layer does not satisfy the following Equation 3, the thickness of the alloy layer is too thick may degrade the plating adhesion.
- T a means the thickness of the alloy layer ( ⁇ m)
- [Si] p means the content (% by weight) of the element included in the molten aluminum-based plating layer
- [Si] b and [Al] b Each means the content (% by weight) of the corresponding element included in the steel sheet)
- the plated steel sheet of the present invention described above can be manufactured by various methods, the manufacturing method is not particularly limited. However, by controlling the cooling conditions after plating as an embodiment thereof, it is possible to ensure a molten aluminum-based plated steel sheet having an alloy layer satisfying the composition and thickness as described above.
- the spraying medium is not limited. That is, the gas may include air, nitrogen, other gases, or a mixture thereof, and the liquid may include water, an aqueous solution of phosphoric acid, or a liquid used for other cooling.
- the primary cooling affects the density of the plating structure and the formation of the alloy phase when the plated metal is solidified. If the cooling is over 350 ° C., the plating structure is easily damaged and a beautiful surface cannot be obtained. In addition, cooling below 250 ° C. is not preferable because of the occurrence of surface defects such as fitting marks, an increase in cooling facilities, and a large amount of refrigerant used.
- cooling rate is less than 3 ° C./sec, the plating structure is coarse and Uniformity is bad If the cooling rate exceeds 10 ° C / second, there is a fear that the refrigerant marks on the surface and surface defects may occur.
- secondary cooling can be cooled by immersing in cooling water.
- a steel slab having the composition shown in Table 1 was heated to a temperature of 1200 ° C., hot rolled at 860 ° C., wound up at 620 ° C., and then air cooled to obtain a hot rolled steel sheet. Thereafter, the oxide on the surface of the hot rolled steel sheet was removed with a hydrochloric acid solution, followed by cold rolling at a cold reduction ratio of 70% to obtain a 1.2 mm cold rolled steel sheet. Thereafter, the cold rolled steel sheet was subjected to annealing for 90 seconds under an N 2 -10vol% H 2 atmosphere at 800 ° C., and then immersed in an aluminum plating bath (plating bath temperature: 600 to 680 ° C.) having the composition shown in Table 1 below.
- An aluminum plating layer was formed on the surface of the steel sheet. Thereafter, the coating weight was adjusted to 80 g / m 2 based on one side through air wiping, and then cooled by secondary cooling to 300 ° C. using a cooling rate of 6 ° C./sec to 300 ° C. using air and mist.
- the alloy layer composition and thickness of each of the aluminum-based plated steel sheet was measured, and the results are shown in Table 2 below.
- the composition of the alloy layer was performed three times after SEM-EDS point analysis, and the average value was calculated, and the thickness of the alloy layer was measured through the average value after measuring three times in the optical microscope X1000 times field of view.
- the plating adhesiveness was tested by taping the outer portion of the bend to evaluate the degree of peeling of the plating layer based on the following criteria.
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Mechanical Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Physics & Mathematics (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Thermal Sciences (AREA)
- Coating With Molten Metal (AREA)
Abstract
Description
Claims (9)
- 중량%로, Mn: 5~35%, Al: 0.3~6%, Si: 0.1~1.2%, 잔부 Fe 및 불가피한 불순물을 포함하는 소지강판과 상기 소지강판의 표면에 형성되고, 중량%로, Si: 3~12%, 잔부 Al 및 불가피한 불순물을 포함하는 용융 알루미늄계 도금층을 포함하고,상기 소지강판과 상기 용융 알루미늄계 도금층의 계면에 Fe-Al-Si-Mn계 합금상을 포함하고, 0.1~10μm의 두께를 갖는 합금층을 포함하고,상기 합금층은 중량%로, Al: 40~70%, Si: 2~13%, Mn: 3~9%, 잔부 Fe 및 불가피한 불순물을 포함하는 고망간 용융 알루미늄계 도금강판.
- 제1항에 있어서,상기 소지강판에 포함된 Al 및 Si의 함량은 하기 관계식 1을 만족하는 고망간 용융 알루미늄계 도금강판.[관계식 1]1.0≤[Al]b/[Si]b≤10(여기서, [Al]b 및 [Si]b 각각은 소지강판에 포함된 해당 원소의 함량(중량%)를 의미함)
- 제1항에 있어서,상기 소지강판에 포함된 Mn, Al 및 Si의 함량은 하기 관계식 2를 만족하는 고망간 용융 알루미늄계 도금강판.[관계식 2]5.0≤[Mn]b/([Al]b+[Si]b)≤12.0(여기서, [Mn]b, [Al]b 및 [Si]b 각각은 소지강판에 포함된 해당 원소의 함량(중량%)를 의미함)
- 제1항에 있어서,상기 소지강판은 중량%로, C: 0.3~0.9%, Ti: 0.01~0.5%, V: 0.05~0.5%, B: 0.0005~0.0050%, Cr: 0.01~0.5%, Mo: 0.01~0.5%, Nb: 0.01~0.05%, Sb: 0.01~0.1% 및 Sn: 0.01~0.1%로 이루어진 군으로부터 선택된 1종 이상을 더 포함하는 고망간 용융 알루미늄계 도금강판.
- 제1항에 있어서,상기 용융 알루미늄계 도금층은 중량%로, Mg: 0.1~10%을 더 포함하는 고망간 용융 알루미늄계 도금강판.
- 제1항에 있어서,상기 용융 알루미늄계 도금층은 중량%로, Ca: 0.001~5%, Sr: 0.005~2%, Mn: 0.01~2%, Cr: 0.01~2%, Mo: 0.01~2% 및 Sn: 0.1~10%로 이루어진 군으로부터 선택된 1종 이상을 더 포함하는 고망간 용융 알루미늄계 도금강판.
- 제1항에 있어서,상기 합금층은 중량%로, Mg: 1% 이하(0% 제외)를 더 포함하는 고망간 용융 알루미늄계 도금강판.
- 제1항에 있어서,상기 합금층의 두께는 3~7μm인 고망간 용융 알루미늄계 도금강판.
- 제1항에 있어서,상기 합금층의 두께는 하기 관계식 3을 만족하는 고망간 용융 알루미늄계 도금강판.[관계식 3]Ta≤(-0.78)x[A] + 11.7[A]=0.75[Si]p+0.15[Si]b+0.10[Al]b(여기서, Ta는 합금층의 두께(μm)를 의미하고, [Si]p는 용융 알루미늄계 도금층에 포함된 해당 원소의 함량(중량%)를 의미하며, [Si]b 및 [Al]b 각각은 소지강판에 포함된 해당 원소의 함량(중량%)를 의미함)
Priority Applications (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US16/064,735 US10968506B2 (en) | 2015-12-24 | 2016-12-23 | High-manganese hot-dip aluminum-coated steel sheet having excellent coating adhesion |
JP2018532607A JP6692432B2 (ja) | 2015-12-24 | 2016-12-23 | めっき密着性に優れた高マンガン溶融アルミニウム系めっき鋼板 |
EP16879400.6A EP3395982B1 (en) | 2015-12-24 | 2016-12-23 | High-manganese hot-dip aluminum-coated steel sheet having excellent coating adhesion |
CN201680076315.1A CN108431270B (zh) | 2015-12-24 | 2016-12-23 | 镀覆粘附性优异的高锰热浸铝系镀覆钢板 |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
KR1020150186145A KR101746996B1 (ko) | 2015-12-24 | 2015-12-24 | 도금 밀착성이 우수한 고망간 용융 알루미늄계 도금강판 |
KR10-2015-0186145 | 2015-12-24 |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2017111533A1 true WO2017111533A1 (ko) | 2017-06-29 |
Family
ID=59089632
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/KR2016/015171 WO2017111533A1 (ko) | 2015-12-24 | 2016-12-23 | 도금 밀착성이 우수한 고망간 용융 알루미늄계 도금강판 |
Country Status (6)
Country | Link |
---|---|
US (1) | US10968506B2 (ko) |
EP (1) | EP3395982B1 (ko) |
JP (1) | JP6692432B2 (ko) |
KR (1) | KR101746996B1 (ko) |
CN (1) | CN108431270B (ko) |
WO (1) | WO2017111533A1 (ko) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2021524885A (ja) * | 2018-05-31 | 2021-09-16 | ポスコPosco | TWB溶接特性に優れた熱間成形用Al−Fe合金化めっき鋼板、熱間成形部材、及びその製造方法 |
Families Citing this family (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN109154050B (zh) * | 2016-05-24 | 2021-04-06 | 安赛乐米塔尔公司 | 用于制造具有奥氏体基体的twip钢板的方法 |
US20220049338A1 (en) * | 2018-11-30 | 2022-02-17 | Posco | Aluminum-based plated steel plate for hot press having excellent resistance against hydrogen delayed fracture and spot weldability, and method for manufacturing same |
KR102275785B1 (ko) * | 2019-11-18 | 2021-07-08 | 동명대학교산학협력단 | 내식성이 우수한 용융 알루미늄도금 탄소강관 |
KR102311503B1 (ko) | 2019-12-20 | 2021-10-13 | 주식회사 포스코 | 가공성 및 내식성이 우수한 알루미늄계 합금 도금강판 및 이의 제조방법 |
CN115572931A (zh) * | 2022-09-15 | 2023-01-06 | 首钢集团有限公司 | 一种热浸镀锌铝镁镀层钢及其制备方法 |
Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH08277453A (ja) * | 1995-02-08 | 1996-10-22 | Nippon Steel Corp | 耐食性、耐熱性に優れた溶融アルミニウムめっき鋼板及びその製造法 |
JPH10152764A (ja) * | 1996-11-26 | 1998-06-09 | Nkk Corp | スパングルの均一性に優れたAl含有溶融亜鉛めっき鋼 板およびその製造方法 |
JP2011214145A (ja) * | 2010-03-17 | 2011-10-27 | Nippon Steel Corp | 高耐食性を有し加工性に優れためっき鋼材と鋼管およびその製造方法 |
KR20120065464A (ko) * | 2010-12-13 | 2012-06-21 | 주식회사 포스코 | 항복비 및 연성이 우수한 오스테나이트계 경량 고강도 강판 및 그의 제조방법 |
KR20140131203A (ko) * | 2013-05-03 | 2014-11-12 | 주식회사 포스코 | 표면품질, 도금밀착성 및 용접성이 우수한 고강도 용융아연도금강판 제조방법 |
Family Cites Families (17)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2000282204A (ja) | 1999-04-02 | 2000-10-10 | Nippon Steel Corp | 端面、加工部の耐食性に優れた建材用アルミめっき鋼板 |
JP2001131725A (ja) | 1999-11-08 | 2001-05-15 | Nippon Steel Corp | 耐熱性、耐食性に優れた溶融アルミめっき鋼板及びその製造法 |
CN100540719C (zh) * | 2002-03-08 | 2009-09-16 | 新日本制铁株式会社 | 表面平滑性优良的高耐蚀性热浸镀钢材 |
JP4751168B2 (ja) * | 2005-10-13 | 2011-08-17 | 新日本製鐵株式会社 | 加工性に優れた溶融Al系めっき鋼板及びその製造方法 |
KR100742833B1 (ko) * | 2005-12-24 | 2007-07-25 | 주식회사 포스코 | 내식성이 우수한 고 망간 용융도금강판 및 그 제조방법 |
KR100742823B1 (ko) | 2005-12-26 | 2007-07-25 | 주식회사 포스코 | 표면품질 및 도금성이 우수한 고망간 강판 및 이를 이용한도금강판 및 그 제조방법 |
KR100851158B1 (ko) | 2006-12-27 | 2008-08-08 | 주식회사 포스코 | 충돌특성이 우수한 고망간형 고강도 강판 및 그 제조방법 |
KR20090038756A (ko) * | 2007-10-16 | 2009-04-21 | 유니온스틸 주식회사 | 용융 알루미늄계 도금강판 및 그 제조방법 |
KR100985286B1 (ko) * | 2007-12-28 | 2010-10-04 | 주식회사 포스코 | 내지연파괴 특성이 우수한 고강도 고망간강 및 제조방법 |
DE102008005605A1 (de) | 2008-01-22 | 2009-07-23 | Thyssenkrupp Steel Ag | Verfahren zum Beschichten eines 6 - 30 Gew. % Mn enthaltenden warm- oder kaltgewalzten Stahlflachprodukts mit einer metallischen Schutzschicht |
KR101079472B1 (ko) | 2008-12-23 | 2011-11-03 | 주식회사 포스코 | 도금표면품질이 우수한 고망간강의 용융아연도금강판의 제조방법 |
KR101008042B1 (ko) | 2009-01-09 | 2011-01-13 | 주식회사 포스코 | 내식성이 우수한 알루미늄 도금강판, 이를 이용한 열간 프레스 성형 제품 및 그 제조방법 |
KR101242859B1 (ko) | 2010-11-05 | 2013-03-12 | 주식회사 포스코 | 도금성 및 도금밀착성이 우수한 고망간 용융아연도금강판 및 그 제조방법 |
KR20120075260A (ko) | 2010-12-28 | 2012-07-06 | 주식회사 포스코 | 도금밀착성이 우수한 용융도금강판 및 그 제조방법 |
KR101382981B1 (ko) | 2011-11-07 | 2014-04-09 | 주식회사 포스코 | 온간프레스 성형용 강판, 온간프레스 성형 부재 및 이들의 제조방법 |
KR20140014500A (ko) | 2012-07-24 | 2014-02-06 | 주식회사 포스코 | 굽힘 가공성이 우수한 1500MPa급 초고강도 고망간 강판 및 그 제조방법 |
MX370268B (es) * | 2012-08-03 | 2019-12-09 | Nippon Steel Corp Star | Lamina de acero galvanizada por inmersion en caliente y metodo de fabricacion de la misma. |
-
2015
- 2015-12-24 KR KR1020150186145A patent/KR101746996B1/ko active IP Right Grant
-
2016
- 2016-12-23 WO PCT/KR2016/015171 patent/WO2017111533A1/ko active Application Filing
- 2016-12-23 US US16/064,735 patent/US10968506B2/en active Active
- 2016-12-23 EP EP16879400.6A patent/EP3395982B1/en active Active
- 2016-12-23 CN CN201680076315.1A patent/CN108431270B/zh active Active
- 2016-12-23 JP JP2018532607A patent/JP6692432B2/ja active Active
Patent Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH08277453A (ja) * | 1995-02-08 | 1996-10-22 | Nippon Steel Corp | 耐食性、耐熱性に優れた溶融アルミニウムめっき鋼板及びその製造法 |
JPH10152764A (ja) * | 1996-11-26 | 1998-06-09 | Nkk Corp | スパングルの均一性に優れたAl含有溶融亜鉛めっき鋼 板およびその製造方法 |
JP2011214145A (ja) * | 2010-03-17 | 2011-10-27 | Nippon Steel Corp | 高耐食性を有し加工性に優れためっき鋼材と鋼管およびその製造方法 |
KR20120065464A (ko) * | 2010-12-13 | 2012-06-21 | 주식회사 포스코 | 항복비 및 연성이 우수한 오스테나이트계 경량 고강도 강판 및 그의 제조방법 |
KR20140131203A (ko) * | 2013-05-03 | 2014-11-12 | 주식회사 포스코 | 표면품질, 도금밀착성 및 용접성이 우수한 고강도 용융아연도금강판 제조방법 |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2021524885A (ja) * | 2018-05-31 | 2021-09-16 | ポスコPosco | TWB溶接特性に優れた熱間成形用Al−Fe合金化めっき鋼板、熱間成形部材、及びその製造方法 |
JP7261822B2 (ja) | 2018-05-31 | 2023-04-20 | ポスコ カンパニー リミテッド | TWB溶接特性に優れた熱間成形用Al-Fe合金化めっき鋼板、熱間成形部材の製造方法 |
US11939651B2 (en) | 2018-05-31 | 2024-03-26 | Posco Co., Ltd | Al—Fe-alloy plated steel sheet for hot forming, having excellent TWB welding characteristics, hot forming member, and manufacturing methods therefor |
Also Published As
Publication number | Publication date |
---|---|
EP3395982B1 (en) | 2020-08-19 |
KR101746996B1 (ko) | 2017-06-28 |
CN108431270A (zh) | 2018-08-21 |
US20190010597A1 (en) | 2019-01-10 |
CN108431270B (zh) | 2020-07-17 |
US10968506B2 (en) | 2021-04-06 |
EP3395982A4 (en) | 2018-11-21 |
JP6692432B2 (ja) | 2020-05-13 |
JP2019504204A (ja) | 2019-02-14 |
EP3395982A1 (en) | 2018-10-31 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
WO2017111533A1 (ko) | 도금 밀착성이 우수한 고망간 용융 알루미늄계 도금강판 | |
WO2018117716A1 (ko) | 내식성이 우수한 알루미늄계 도금 강재, 이를 이용한 알루미늄계 합금화 도금 강재 및 이들의 제조방법 | |
WO2012091385A2 (en) | High corrosion resistant hot dip zn alloy plated steel sheet and method of manufacturing the same | |
WO2015099455A1 (ko) | 액체금속취화에 의한 크랙 저항성이 우수한 용융아연도금강판 | |
WO2013032173A2 (ko) | 도금밀착성이 우수한 고망간강 및 이로부터 용융아연도금강판을 제조하는 방법 | |
WO2018117769A1 (ko) | 내식성 및 가공성이 우수한 용융 알루미늄계 도금강재 및 그 제조방법 | |
WO2017111449A1 (ko) | 도금성이 우수한 고강도 용융 아연계 도금 강재 및 그 제조방법 | |
WO2016105115A1 (ko) | 표면품질, 도금밀착성 및 성형성이 우수한 고강도 용융아연도금강판 및 그 제조방법 | |
WO2017111491A1 (ko) | 도금성 및 용접성이 우수한 오스테나이트계 용융 알루미늄 도금강판 및 그 제조방법 | |
WO2015099399A1 (ko) | 내식성 및 용접성이 우수한 열간 프레스 성형용 강판, 성형부재 및 그 제조방법 | |
WO2021112519A1 (ko) | 굽힘 가공성 및 내식성이 우수한 용융아연도금강판 및 이의 제조방법 | |
WO2018117450A1 (ko) | 저온인성 및 후열처리 특성이 우수한 내sour 후판 강재 및 그 제조방법 | |
WO2021125696A2 (ko) | 알루미늄합금 도금강판, 열간성형 부재 및 이들의 제조방법 | |
WO2020111881A1 (ko) | 내식성 및 용접성이 우수한 열간 프레스용 알루미늄-철계 도금 강판 및 그 제조방법 | |
WO2018117770A1 (ko) | 가공부 내식성이 우수한 알루미늄계 합금 도금강판 | |
WO2019125020A1 (ko) | 저온 밀착성과 가공성이 우수한 용융아연도금강판 및 그 제조방법 | |
WO2019124765A1 (ko) | 내충격특성이 우수한 고강도 강판 및 그 제조방법 | |
WO2021112584A1 (ko) | 표면품질과 점 용접성이 우수한 아연도금강판 및 그 제조방법 | |
WO2018110906A1 (ko) | 표면품질이 우수한 고탄소 열연강판 및 이의 제조방법 | |
WO2017111518A1 (ko) | 가공성이 우수한 열연도금강판 및 그 제조방법 | |
WO2021125888A2 (ko) | 가공성 및 내식성이 우수한 알루미늄계 합금 도금강판 및 이의 제조방법 | |
WO2021125887A2 (ko) | 가공성 및 내식성이 우수한 알루미늄계 합금 도금강판 및 이의 제조방법 | |
WO2021125885A1 (ko) | 표면품질과 전기저항 점 용접성이 우수한 고강도 용융아연도금 강판 및 그 제조방법 | |
WO2019124997A1 (ko) | 도금성이 우수한 고강도 용융아연도금강판 및 그 제조방법 | |
WO2018117703A1 (ko) | 희생방식성 및 도금성이 우수한 고망간 용융 알루미늄 도금강판 및 그 제조방법 |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
121 | Ep: the epo has been informed by wipo that ep was designated in this application |
Ref document number: 16879400 Country of ref document: EP Kind code of ref document: A1 |
|
ENP | Entry into the national phase |
Ref document number: 2018532607 Country of ref document: JP Kind code of ref document: A |
|
NENP | Non-entry into the national phase |
Ref country code: DE |
|
WWE | Wipo information: entry into national phase |
Ref document number: 2016879400 Country of ref document: EP |
|
ENP | Entry into the national phase |
Ref document number: 2016879400 Country of ref document: EP Effective date: 20180724 |