KR19990051958A - METHOD FOR MANUFACTURING METALIZED ZINC PLATED STEEL SHEET - Google Patents
METHOD FOR MANUFACTURING METALIZED ZINC PLATED STEEL SHEET Download PDFInfo
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- KR19990051958A KR19990051958A KR1019970071399A KR19970071399A KR19990051958A KR 19990051958 A KR19990051958 A KR 19990051958A KR 1019970071399 A KR1019970071399 A KR 1019970071399A KR 19970071399 A KR19970071399 A KR 19970071399A KR 19990051958 A KR19990051958 A KR 19990051958A
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- 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
- C23C14/00—Coating by vacuum evaporation, by sputtering or by ion implantation of the coating forming material
- C23C14/06—Coating by vacuum evaporation, by sputtering or by ion implantation of the coating forming material characterised by the coating material
- C23C14/14—Metallic material, boron or silicon
- C23C14/16—Metallic material, boron or silicon on metallic substrates or on substrates of boron or silicon
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- 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
- C23C14/00—Coating by vacuum evaporation, by sputtering or by ion implantation of the coating forming material
- C23C14/22—Coating by vacuum evaporation, by sputtering or by ion implantation of the coating forming material characterised by the process of coating
- C23C14/24—Vacuum evaporation
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- 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
- C23C28/00—Coating for obtaining at least two superposed coatings either by methods not provided for in a single one of groups C23C2/00 - C23C26/00 or by combinations of methods provided for in subclasses C23C and C25C or C25D
- C23C28/02—Coating for obtaining at least two superposed coatings either by methods not provided for in a single one of groups C23C2/00 - C23C26/00 or by combinations of methods provided for in subclasses C23C and C25C or C25D only coatings only including layers of metallic material
- C23C28/023—Coating for obtaining at least two superposed coatings either by methods not provided for in a single one of groups C23C2/00 - C23C26/00 or by combinations of methods provided for in subclasses C23C and C25C or C25D only coatings only including layers of metallic material only coatings of metal elements only
- C23C28/025—Coating for obtaining at least two superposed coatings either by methods not provided for in a single one of groups C23C2/00 - C23C26/00 or by combinations of methods provided for in subclasses C23C and C25C or C25D only coatings only including layers of metallic material only coatings of metal elements only with at least one zinc-based layer
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Abstract
본 발명은 Fe증착 합금화 용융아연도금강판의 제조방법에 관한 것이며, 그 목적하는 바는 플래쉬 강판의 제조방법에 있어서, 상층의 도금방법으로 전기도금법 대신에 진공증착법을 적용하고, 상층도금계로는 Fe 리치 도금계가 아닌 Fe 단금속을 적용하고, 증착중 소재의 온도를 제어함으로써, 공정이 단순하고, 인산염처리성과 전착도장성이 동시에 우수하고, 또한 내식성이 우수한 합금화 용융아연도금강판의 제조방법을 제공하고자 하는데 있다.The present invention relates to a method of manufacturing a hot-dip galvanized steel sheet by Fe deposition, and it is an object of the present invention to provide a method of manufacturing a flash steel sheet in which a vacuum deposition method is applied instead of the electroplating method by an upper layer plating method, Provided is a method for manufacturing an alloyed hot-dip galvanized steel sheet which is simple in process, excellent in phosphate processability and electrodeposition resistance, and excellent in corrosion resistance by applying an Fe-stage metal other than the rich plating system and controlling the temperature of the material during vapor deposition I want to.
상기 목적을 달성하기 위한 본 발명은 합금화 용융아연도금 강판상에 상층의 도금층을 형성하는 방법에 있어서, 합금화 용융아연도금강판을 250∼350℃로 유지하여 상기 강판상에 Fe 을 2-5g/m2의 범위로 진공증착하는 Fe 증착 합금화 용융아연도금강판의 제조방법에 관한 것을 그 요지로 한다.According to an aspect of the present invention, there is provided a method for forming a plating layer of an upper layer on a galvannealed galvanized steel sheet, comprising the steps of maintaining a galvannealed steel sheet at 250 to 350 캜, The present invention also relates to a method for producing an Fe-deposited alloyed hot-dip galvanized steel sheet by vacuum evaporation in a range of 0.1 to 2 wt%.
Description
본 발명은 인산염처리성 및 전착도장성이 우수한 합금화 용융아연도금강판의 제조방법에 관한 것으로, 보다 상세하게는 합금화 용융아연도금강판(Galvannealed steel sheet)의 표면에 Fe를 진공증착함으로써 인산염 처리성과 내식성을 함께 향상시키는 합금화 용융아연도금강판의 제조방법에 관한 것이다.The present invention relates to a method for producing an alloyed hot-dip galvanized steel sheet excellent in phosphate treatment and electrodeposition resistance, and more particularly, to a method for producing a galvannealed steel sheet by vacuum depositing Fe on the surface of a galvannealed steel sheet, The present invention relates to a method of manufacturing a galvannealed steel sheet.
용융아연도금강판을 도금직후에 확산 열처리하여 제조하는 합금화 용융아연도금강판은, 아연도금강판에 비해서, 인산염 처리성과 전착도장성이 우수하여 자동차 내외판용으로 널리 사용되고 있다. 같은 용도로 사용되고 있는 도금강판으로는 아연-철 전기도금 강판이 있다. 자동차의 내구성에 대한 수요가의 욕구 및 각 나라마다 규제가 더욱 엄격해지면서, 최근에는 이들의 인산염처리성을 개선하여 도장성을 향상시키기 위해서 여러 형태의 이층도금강판을 개발하여 적용하는 사례가 늘어나고 있다.The galvannealed galvanized steel sheet produced by the diffusion heat treatment of the hot-dip galvanized steel sheet immediately after plating is superior to the galvanized steel sheet because of its excellent phosphate treatment and electrodeposition resistance, and is widely used for interior and exterior use in automobiles. Plated steel sheets used for the same purpose include zinc-iron electroplated steel sheets. In recent years, as a result of the demand for the durability of automobiles and the regulations of each country becoming more strict, there have been increasing cases of developing and applying various types of double-coated steel sheets in order to improve their phosphate treatment properties and improve paintability have.
한편, 이층도금강판은 문자그대로 2개의 도금층을 형성시키는 기술로서 하층 도금으로 방청성(내식성)을 확보하고 상층 도금으로 도장성 및 용접성을 향상시키는 것을 목표로 한다. 이층도금강판은 그 제조방법에 따라 이층전기도금 강판과 플래쉬(Flash) 도금강판으로 대별한다.On the other hand, the double-layer coated steel sheet is intended to literally form two plating layers, and aims at ensuring rust resistance (corrosion resistance) by lower layer plating and improving paintability and weldability by upper layer plating. Double-layer coated steel sheets are classified into two-layer electroplated steel sheets and flash-coated steel sheets according to their manufacturing methods.
상기 이층 전기도금강판은 상,하층 모두를 전기도금법으로 제조하는 것이다. 하층 도금으로는 Zn-(10∼20%)Fe, Zn-(10∼15%)Ni 등의 소위 Zn 리치(rich)도금계를 적용하여 Zn가 소지강판에 대하여 갖는 희생방식성을 더욱 강화한다. 상층 도금으로는 Zn 보다 화성처리성이 월등히 우수한 Fe의 특성을 이용하여 Fe-(15∼50%)Zn, Fe-(0.1∼1%)P, Fe-(15∼20%)Mn 등의 소위 Fe 리치 도금계를 적용한다. 이와같이 이층도금계를 구성함으로써 전기 아연도금 강판이나 용융아연도금강판, 합금화 용융아연도금강판 등에 비해서 우수한 방청성과 화성처리성을 동시에 얻을 수 있다. 이때, 상층 도금의 부착량은 대개 5g/m2이하이다.The two-layer electroplated steel sheet is manufactured by electroplating both the upper and lower layers. For the lower layer plating, a so-called Zn rich plating system such as Zn- (10-20%) Fe and Zn- (10-15%) Ni is applied to further enhance the sacrificial resistance of Zn to the substrate steel . Upper layer plating is made of Fe (15-50%) Zn, Fe- (0.1-1%) P and Fe- (15-20%) Mn and so on Fe rich plating system is applied. By constituting the double-layered system in this way, excellent rustproofing property and chemical treatment property can be obtained at the same time as compared with the case of the galvanized steel sheet, the hot-dip galvanized steel sheet, the galvannealed galvanized steel sheet and the like. At this time, the adhesion amount of the upper layer plating is usually 5 g / m 2 or less.
상기 플래쉬 도금강판은 내식성과 용접성이 우수한 합금화 용융아연도금강판을 소재로 하여 그 표면에 전기도금법으로 화성처리성이 우수한 도금계를 박도금한 제품을 말한다. 상층 도금계로는 이층 전기도금에서와 마찬가지로 화성처리성이 우수한 Fe-리치계 전기도금이 적용되고 있다. 상층도금계의 예로 Fe-Zn, Fe-Mn 등을 들 수 있다.The flash-plated steel sheet refers to a product obtained by plating an alloyed hot-dip galvanized steel sheet excellent in corrosion resistance and weldability and plated with an excellent chemical conversion treatment on its surface by an electroplating method. In the upper layer plating system, as in the case of the double layer electroplating, Fe-rich electroplating excellent in chemical conversion treatment is applied. Examples of the upper layer copper system include Fe-Zn and Fe-Mn.
이에, 본 발명은 플래쉬 강판의 제조방법에 있어서, 상층의 도금방법으로 전기도금법 대신에 진공증착법을 적용하고, 상층도금계로는 Fe 리치 도금계가 아닌 Fe 단금속을 적용하고, 증착중 소재의 온도를 제어함으로써, 공정이 단순하고, 인산염처리성과 전착도장성이 동시에 우수하고, 또한 내식성이 우수한 합금화 용융아연도금강판의 제조방법을 제공하고자 하는데, 그 목적이 있다.Accordingly, in the method of manufacturing a flash steel sheet according to the present invention, the upper layer plating method is a vacuum plating method instead of the electroplating method, the upper layer plating method is a Fe rich plating method, The present invention provides a method of manufacturing an alloyed hot-dip galvanized steel sheet which is simple in process, excellent in phosphate treatment and electrodeposition resistance, and excellent in corrosion resistance.
도 1은 본 발명의 조건을 적용한 Fe 증착 합금화 용융아연도금강판의 깊이방향 성분분포을 보이는 그래프FIG. 1 is a graph showing the depth direction component distribution of the Fe-deposited alloyed hot-dip galvanized steel sheet to which the present invention is applied
도 2(a)(b)는 본 발명의 조건을 적용한 Fe 증착 합금화 용융아연도금강판에서 Fe증착층의 표면 및 인산염 처리후의 표면의 주사전자 현미경사진2 (a) and 2 (b) are SEM images of the surface of the Fe-deposited layer and the surface after the phosphate treatment in the Fe-deposited galvannealed steel sheet to which the conditions of the present invention are applied
상기 목적을 달성하기 위한 본 발명은 합금화 용융아연도금 강판상에 상층의 도금층을 형성하는 방법에 있어서, 합금화 용융아연도금강판을 250∼350℃로 유지하여 상기 강판상에 Fe 을 2-5g/m2의 범위로 진공증착하는 것을 특징으로 하는 Fe 증착 합금화 용융아연도금강판의 제조방법에 관한 것이다.According to an aspect of the present invention, there is provided a method for forming a plating layer of an upper layer on a galvannealed galvanized steel sheet, comprising the steps of maintaining a galvannealed steel sheet at 250 to 350 캜, 2 < / RTI > by vacuum evaporation. ≪ RTI ID = 0.0 > [10] < / RTI >
이하, 본 발명을 상세히 설명한다.Hereinafter, the present invention will be described in detail.
본 발명에서는 소지강판의 합금화 용융아연도금강판을 250-350℃ 로 유지한다.In the present invention, the galvannealed steel sheet of the base steel sheet is maintained at 250-350 캜.
증착시 상기 합금화 용융아연도금강판의 온도가 250℃ 미만이면 합금화 반응이 제대로 일어나지 않으며, 350℃를 초과하면 소재표면에 도금되어 있는 합금화 용융아연도금층이 증발하기 때문에, 본 발명에서는 증착시 소지강판의 온도를 250-350℃ 로 유지한다.When the temperature of the galvannealed steel sheet is lower than 250 ° C during deposition, the galvannealing reaction does not occur properly. When the temperature exceeds 350 ° C, the galvannealed galvannealed layer deposited on the surface of the material evaporates. The temperature is maintained at 250-350 ° C.
일반적으로 Fe 단금속이 표층에 존재할 경우에는 인산염처리성과 전착도장성은 우수하지만 내식성이 떨어진다는 단점이 있다. 이러한 제약을 극복하기 위해서 본 발명에서는 증착중 소재의 온도를 제어함으로써 증착되는 Fe 이 일부가 하층과 합금화를 이루도록 하여 내식성의 열화를 방지하였다.In general, when Fe metal is present in the surface layer, phosphate treatment and electrodeposition resistance are excellent, but corrosion resistance is poor. In order to overcome this limitation, in the present invention, by controlling the temperature of the material during deposition, some of the deposited Fe is alloyed with the lower layer to prevent deterioration of corrosion resistance.
또한, 본 발명에서는 Fe 을 2-5g/m2의 도금두께로 소지강판상에 증착시킨다.In the present invention, Fe is deposited on the base steel sheet with a plating thickness of 2-5 g / m 2 .
상층의 Fe 는 인산염처리시에 인산염 피막으로 치환되므로 이에 필요한 최소한의 양이 필요하다. 그러나 부착량이 2g/m2미만인 경우에는 양호한 인산염 피막을 얻을 수 없다. 따라서, 최소한 2g/m2이상의 Fe 부착량이 필요한 것으로 판단된다.Since the Fe in the upper layer is replaced with a phosphate film during the phosphate treatment, a minimum amount of Fe is required. However, when the adhesion amount is less than 2 g / m 2 , a satisfactory phosphate coating can not be obtained. Therefore, it is judged that an Fe deposition amount of at least 2 g / m 2 is necessary.
또한, Fe의 부착량을 5g/m2이하로 제한한 이유는 내식성의 열화를 방지하기 위해서이다. 증착중 온도를 제어하여 하층 도금과의 합금화를 이룬다고 하더라도 증착량이 지나치게 많아지면 순수 Fe 층이 두꺼워지며, 이 경우에는 도장후에도 손상부위의 내식성이 떨어지는 단점이 있다. 따라서 Fe 이 부착량을 5g/m2이하로 제한한다.The reason why the amount of Fe deposited is limited to not more than 5 g / m 2 is to prevent deterioration of corrosion resistance. Even if the temperature is controlled during the deposition to form an alloy with the lower layer plating, if the deposition amount is excessively large, the pure Fe layer becomes thick, and in this case, there is a drawback that the corrosion resistance of the damaged portion is lowered even after coating. Therefore, the amount of Fe is limited to 5 g / m 2 or less.
이하, 실시예를 통하여 본 발명을 보다 상세히 설명한다.Hereinafter, the present invention will be described in more detail by way of examples.
실시예Example
합금화 용융아연도금강판을 준비하여 하기 표1과 같은 조건으로 Fe를 증착하였다. 또한, 용융아연도금강판 및 전기아연도금강판을 준비하였다.Alloying hot-dip galvanized steel sheets were prepared and Fe was deposited under the conditions shown in Table 1 below. Further, a hot-dip galvanized steel sheet and an electro-galvanized steel sheet were prepared.
준비된 각 시편을 이용하여 다음과 같은 방법으로 도장성 및 내식성을 평가하여 그 결과를 하기 표1에 나타내었다.Using the prepared specimens, the paintability and corrosion resistance were evaluated by the following methods, and the results are shown in Table 1 below.
상기 도장성 평가는 도금된 시편에 인상염처리와 전착도장을 실시한 후 도막밀착성을 평가하여 판정하였으며, 도막밀착성의 평가방법으로는 크로스 컷(Cross-cut) 후에 테이프 박리시험을 이용하였다. 이때, 판정기준은 다음과 같다.The evaluation of the coating properties was made by evaluating the adhesion of the coated film to the film after the impression salt treatment and the electrodeposition coating. The film peeling test was performed after the cross-cut as an evaluation method of the film adhesion. At this time, the criteria are as follows.
◎:전혀 박리가 일어나지 않음.◎: No peeling occurred at all.
○:박리가 부분적으로 일어나지만 박리부의 면적이 전체의 5%이내임.○: The peeling partially occurs but the area of the peeling portion is within 5% of the whole.
△:박리가 부분적으로 일어나지만 박리부의 면적이 전체의 50%이내임.△: Peeling occurs partially but the area of the peeling portion is within 50% of the whole.
×:전체의 50% 이상의 면적에서 박리가 일어남.X: Peeling occurs in an area of 50% or more of the whole area.
상기 내식성 평가는 전착도장 시편을 크로스 컷 후에 50사이클(Cycle)의 복합부식시험을 실시하여 크로스 컷부에서 발생하는 블리스터(Blister)의 최대폭을 측정하여 평가하였다. 이때, 평가기준은 다음과 같다.The corrosion resistance evaluation was carried out by performing a complex corrosion test of 50 cycles after the electrodeposition coating test piece was cross-cut, and the maximum width of the blister generated in the crosscut portion was measured and evaluated. At this time, the evaluation criteria are as follows.
◎:블리스터 발생없음.◎: No blister occurred.
○:블리스터가 일부 발생하지만 최대폭이 2mm이하.○: Some blisters occur but the maximum width is less than 2 mm.
△:블리스터가 일부 발생하지만 최대폭이 5mm이하.△: The blister is partially generated but the maximum width is less than 5 mm.
×:5mm이상의 폭을 갖는 블리스터가 다수 발생.X: many blisters having a width of 5 mm or more were generated.
상기 표1에서 알 수 있는 바와같이, 본 발명의 조건을 만족하는 발명예(1-4)는 도장성면에 있어서 전혀 박리가 일어나지 않아 매우 우수하였고, 또한 내식성면에 있어서도 발생 블리스터의 폭이 2mm이하로 우수함을 보였다.As can be seen from the above Table 1, the inventive example (1-4) satisfying the conditions of the present invention was excellent in that the peelability did not occur at all on the paintable surface, and also in terms of corrosion resistance, Respectively.
이에 반하여, 합금화 용융아연도금강판을 이용하여, 본 발명의 증착조건을 벗어나게 철을 증착시킨 비교예(1,2)는 도장성 또는 내식성이 본 발명에 비하여 떨어졌다. 또한, 상층도금을 행하지 않은 비교예(3), 용융아연도금만을 행한 비교예(4) 및 전기아연도금만을 행한 비교예(6)에 있어서도, 도장성 및 내식성이 발명예에 비하여 열악하였다.On the other hand, the comparative examples (1, 2) in which iron is deposited on the alloyed hot-dip galvanized steel sheet to deviate from the deposition conditions of the present invention have poor paintability or corrosion resistance as compared with the present invention. Also in the comparative example (3) in which the upper layer plating was not performed, the comparative example (4) in which only the hot dip galvanizing was performed, and the comparative example (6) in which only the electroplating was performed, the paintability and corrosion resistance were poor.
한편, 상기 발명예(2)에서 얻어진 Fe층착 합금화 용융아연 도금강판의 깊이 방향 성분분포를 조사하여 도 1에 나타내었다.On the other hand, FIG. 1 shows the distribution of the component in the depth direction of the Fe-layered alloyed hot-dip galvanized steel sheet obtained in the above-described Example 2 of the present invention.
또한, 상기 발명예(2)에서 얻어진 Fe층착 합금화 용융아연 도금강판표면을 주사전자 현미경을 이용한 표면사진을 도 2(a)에 나타내었으며, 인산염처리를 행한후의 표면사진을 도 2(b)에 나타내었다. 도 2에서 알 수 있는 바와 같이, 인산염처리 조직이 미세하고 균일하였다.2 (a) shows a surface photograph of the surface of the Fe-layered alloyed hot-dip galvanized steel sheet obtained by the above-described Example 2 of the invention, using a scanning electron microscope, and a photograph of the surface after the phosphate treatment was performed is shown in Fig. 2 (b) Respectively. As can be seen from Fig. 2, the phosphate treated tissues were fine and uniform.
상술한 바와같이, 본 발명에 의하면 합금화 용융아연도금강판의 상층도금계로서 Fe리치도금계가 아닌 Fe 단금속을 적용하고, 또한 증착중 소재의 온도를 적정범위로 제어함으로써, 인산염처리성과 전착도장성이 동시에 우수하면서도 내식성이 우수한 이층도금 합금화 용융아연도금강판이 얻어지는 효과가 제공된다.As described above, according to the present invention, it is possible to apply the Fe-stage metal rather than the Fe-rich plating system as the upper layer plating system of the galvannealed galvanized steel sheet and further control the temperature of the material during deposition to an appropriate range, A double-layer galvannealed hot-dip galvanized steel sheet excellent in both strength and corrosion resistance is obtained.
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| KR1019970071399A KR100311796B1 (en) | 1997-12-20 | 1997-12-20 | Manufacturing method of iron vapor deposition alloyed hot dip galvanized steel sheet |
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| US11019548B2 (en) | 2017-11-24 | 2021-05-25 | Samsung Electronics Co., Ltd. | Electronic device and communication method thereof |
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| JPS61139661A (en) * | 1984-12-11 | 1986-06-26 | Reiko Co Ltd | Vacuum deposition method |
| JPH01116062A (en) * | 1987-10-28 | 1989-05-09 | Kobe Steel Ltd | Zn-based multilayered vapor-deposited plating material excellent in corrosion resistance on uncoated or coated metallic base material |
| JPH05320878A (en) * | 1992-05-20 | 1993-12-07 | Nissin Electric Co Ltd | Formation of boron nitride containing film |
| KR100256331B1 (en) * | 1995-10-16 | 2000-05-15 | 이구택 | Vacuum deposition galvanized steel sheet with excellent adhesion and surface shape |
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| US11019548B2 (en) | 2017-11-24 | 2021-05-25 | Samsung Electronics Co., Ltd. | Electronic device and communication method thereof |
| US11218938B2 (en) | 2017-11-24 | 2022-01-04 | Samsung Electronics Co., Ltd. | Electronic device and communication method thereof |
| US12192843B2 (en) | 2017-11-24 | 2025-01-07 | Samsung Electronics Co., Ltd. | Electronic device and communication method using 4G and 5G communication based on temperature |
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