TWI633999B - A structure-strengthen metal plate and method manufacturing the same - Google Patents

Abstract

The invention discloses a structurally strengthened metal sheet and a process thereof. The structurally reinforced metal sheet is formed by laminating at least one pair of metal sheets and a reinforcing layer. The structurally reinforced metal sheet comprises at least one metal sheet and at least one reinforcing layer. The material of the reinforcing layer is composed of a fiber material and a composite resin. The composite resin is formed by chemical grafting of an organic material and an inorganic nano ceramic material. The inorganic nano ceramic material is prepared as a sol gel. The structurally strengthened metal sheet proposed by the present invention has high strength, and has a better joint effect between the metal sheet and the layer of the reinforcing layer.

Description

Structural reinforced metal sheet and its process

The present invention is directed to a metal sheet which is particularly useful in the use of composite reinforced metal sheets and methods of making the same.

Metal and metal alloy materials are widely used in industry, including aerospace industry, military industry and people's livelihood industry. For example, most of the structural materials used in aerospace are mainly metal materials, and aluminum alloys account for the majority. When the high-speed or high-speed flight, the strength of the traditional aluminum alloy will be reduced, it is necessary to use titanium alloy or stainless steel as the fuselage structural material. As another example, many large system brackets often use metal alloys. Today's solar photovoltaic systems often use aluminum or aluminum alloy as the system's support.

Conventional metal strengthening is to increase the strength of metal materials by means of alloying, plastic deformation and heat treatment, which is called strengthening of metals. The so-called strength refers to the resistance of a material to plastic deformation and fracture, expressed by the stress that the material can withstand under given conditions. Metal surface strengthening is a relatively simple method compared to conventional metal strengthening methods. Conventional Metal Surface Strengthening Surface treatment is an engineering method that forms a surface layer on the surface of a metal material that is different from the mechanical, physical, and chemical properties of the base metal to meet the corrosion resistance, wear resistance, strength, or other functional requirements of the product. Common surface The treatment methods are mechanical grinding, chemical treatment, surface heat treatment, spray coating, and the like.

In various metal surface strengthening techniques, the sprayed surface is a relatively simple but effective process. The problem that traditional metal surface strengthening needs to overcome is the compatibility of various metal sheets with surface coatings.

In view of this, it is necessary to propose a method of using a composite material to strengthen a metal plate and a process thereof to improve the applicability and practicability of the metal plate.

The present invention mainly provides a structurally reinforced metal plate capable of improving the strength of the metal plate. The invention further provides a method for manufacturing a structurally strengthened metal plate, which can be used to enhance the strength of the metal plate in a simple process by using a surface strengthening method to laminate the composite material on the surface of the metal plate.

For the primary object of the present invention, the present invention provides a structurally reinforced metal sheet comprising: at least one metal sheet; and at least one reinforcing layer disposed over the metal sheet. Wherein, the layer of strengthening layer is formed by a fiber material and a composite resin embedded in the fiber material, the composite resin is formed by chemical grafting of an organic material and an inorganic nano ceramic material. And the inorganic nano ceramic material has a powder size of between 5 nm and 100 nm.

According to a feature of the invention, the inorganic nano ceramic material has a weight ratio of the composite resin of between 30% and 90%.

For the main purpose of the present invention, a method for fabricating a structurally strengthened metal sheet comprises the following steps: Step 1: preparing an inorganic nano ceramic material having a powder size ranging from 10 nm to 100 Between nanometers; step two: mixing an organic material with the inorganic nano ceramic material to form a composite tree Grease; Step 3: mixing a fiber material with the composite resin glue; Step 4: coating the fiber material and the composite resin glue material on a metal plate; Step 5: curing the fiber material and the composite resin glue a mixed material to form a strengthening layer on the metal plate of the layer; wherein the composite resin is formed by chemical grafting of an organic material and an inorganic nano ceramic material, and the powder size of the inorganic nano ceramic material is Between 5 nm and 100 nm.

According to a feature of the invention, in step five, the curing temperature is between 50 and 200 degrees.

The structurally strengthened metal sheet of the present invention has the following effects:

1. The composite resin is formed by chemical grafting of an organic material and an inorganic nano ceramic material, and can be well filled into a fiber material to form a strengthening layer having a very high strength.

2. The composite resin has an inorganic nano ceramic material and has special chemical ability. The metal plate does not require additional surface treatment, and the layer of the reinforcing layer and the metal plate can have good adhesion.

3. The thickness of the reinforcing layer of the present invention (100 micrometers to 2 centimeters) is thinner than that of the conventional insulating layer, so that the amount of materials can be reduced to reduce the cost.

100‧‧‧Structural reinforced metal sheet

110‧‧‧Metal plates

120‧‧‧Strengthen

130‧‧‧Metal plates

140‧‧‧Strengthen

The above and other objects, features, and advantages of the present invention will become more apparent and understood.

BRIEF DESCRIPTION OF THE DRAWINGS Figure 1 is a schematic view showing a first embodiment of a structurally reinforced metal plate structure of the present invention.

Fig. 2 is a view showing a second embodiment of a structurally reinforced metal plate structure of the present invention.

3 is a flow chart showing a method of manufacturing a structurally strengthened metal sheet of the present invention.

While the invention may be embodied in a variety of forms, the embodiments shown in the drawings and illustrated herein are the preferred embodiments of the invention. Those skilled in the art will appreciate that the devices and methods specifically described herein and illustrated in the drawings are considered as an example of the invention, non-limiting exemplary embodiments, and the scope of the invention Defined. Features illustrated or described in connection with an exemplary embodiment may be combined with features of other embodiments. Such modifications and variations are intended to be included within the scope of the invention.

The present invention will disclose a structurally reinforced metal sheet. Please refer to FIG. 1 , which is a schematic view showing a first embodiment of the structure of the structural reinforced metal plate 100 of the present invention, which comprises at least: a metal plate 110; and a reinforcing layer 120 attached to the metal plate 110 . .

The metal plate 110 is composed of a metal plate having a specific thickness, and the thickness of the metal plate is between 100 micrometers and 2 centimeters, and is mainly used as a mechanical structure of a structurally strengthened metal plate. The metal plate 110 is selected from the group consisting of aluminum, aluminum alloy, magnesium, magnesium alloy, titanium, titanium alloy, copper, copper alloy, and low alloy steel. Steel), stainless steel (Stainless steel) and heat resisting alloy (Heat resisting alloy).

The specific gravity of aluminum alloy is only one-third of that of mild steel. Aluminum alloys usually use alloying elements such as copper, zinc, manganese, bismuth and magnesium. Compared with ordinary carbon steel, they have lighter and corrosion-resistant properties, but the corrosion resistance is not as good as pure. aluminum. The surface of the aluminum alloy forms a protective oxide layer in a clean, dry environment. Galvanic corrosion is accelerated by the fact that the aluminum alloy is in contact with stainless steel, the corrosion potential of other metals is lower than that of aluminum alloy or in a humid environment. Magnesium alloys have a specific gravity of 1.8, only two-thirds of aluminum alloys. They are the lightest in practical alloys because they do not require too much load but require moderate material thickness, but lack corrosion resistance. Titanium alloy is 1.6 times heavier than aluminum alloy, but its tensile strength is twice as high. It is similar to special steel and has excellent corrosion resistance and heat resistance. However, the raw materials are expensive, difficult to process, and use high temperature resistant parts. Copper alloys are copper-based alloys that are effective against corrosion. The copper alloy mainly includes beryllium copper alloy, silver copper alloy, nickel copper alloy, tungsten copper alloy, and phosphor bronze alloy. Low-alloy steel, also known as carbon steel, is a steel that adds a small amount of metal elements (8% or less) to the steel in addition to carbon. Stainless steel is a general term for steels containing a large amount of chromium (11% or more). It is a metal material that is not only corrosion-resistant, high-strength, and has excellent high-low temperature properties. Heat-resistant alloy is a general term for alloys that are more than 650 degrees Celsius, resistant to corrosion and high in strength at high temperatures, also known as superalloys.

The layer of reinforcing layer 120 is formed of a fibrous material and a composite resin in which the composite resin is embedded. The thickness of the layer of reinforcing layer is between 100 micrometers and 2 centimeters, and sufficient strength can be obtained; preferably, the thickness of the layer of reinforcing layer is between 200 micrometers and 1 centimeter, which can obtain sufficient strength and goodness. Connection and sex.

The weight of the fibrous material is X grams, and the weight of the composite resin is Y grams, the weight of the reinforcing layer is (X+Y) grams, and the weight ratio of the fibrous material in the reinforcing layer of the layer is X/(X). +Y), and the weight ratio of the composite resin in the layer of the reinforcing layer Is Y/(X+Y). The weight ratio of the fiber material in the layer of the reinforcing layer 120 is between 30% and 80%, preferably between 50% and 80%, that is, the weight ratio of the composite resin in the layer of the reinforcing layer 120 is It is between 20% and 70%, preferably between 20% and 50%.

The fiber material is selected from the group consisting of carbon fiber, glass fiber, Kevlar fiber, Boron fiber, and silicon carbide fiber.

Carbon fiber, also known as graphite fiber, is a high-temperature fiber with high strength and modulus, and is a high-end variety of chemical fiber. It is composed of a material of about 5-10 micron diameter fibers and consists mainly of carbon atoms. Carbon fiber properties such as high hardness, high strength, light weight, high chemical resistance, high temperature resistance and low thermal expansion.

Glass fiber materials include E-glass, S-glass and E-glass. E-glass is a calcium-boron-glass fiber for reinforcing plastics and has excellent electrical properties. S-glass has high strength and high modulus of elasticity. It is used in space and has a specific gravity of about 2% compared with E-glass. The tensile strength is about 35%, and the elastic modulus is about 20%. C-glass is sodium-sodium-boron-glass fiber, which has excellent chemical corrosion resistance and is suitable for corrosion-resistant fiber composite products.

Kevlar fiber material is an artificial organic aromatic ammonium ammonium fiber containing Kevlar 29 and Kevlar 49. The characteristics are low density, high strength, and low cost, but the composite material produced has a low compressive strength.

Boron fiber materials are mostly used to make boron/epoxy composite materials, and boron is deposited on tungsten wires by chemical vapor deposition.

The cerium carbide fiber material is also produced by chemical vapor deposition or polymer method and has a diameter of about 140 mm. Because strontium carbide fiber can withstand higher temperatures, it can maintain about 50% strength at around 1000 °C, and it is often used in aluminum or titanium alloy. On the material.

The composite resin is formed by chemical grafting of an organic material and an inorganic nano ceramic material, and the inorganic nano ceramic material has a powder size of between 5 nm and 100 nm. The inorganic nano ceramic material is selected from the group consisting of nano alumina, nano cerium oxide, nano zirconia, nano titanium oxide and nano boron nitride. The organic material is selected from the group consisting of epoxy resin, acrylic resin, oxime resin, fluorocarbon resin, acid alcohol resin, amino resin, phenolic resin and acrylic resin.

The weight of the organic material is M grams, and the weight of the inorganic nano ceramic material is N grams, the weight of the composite resin layer is (M+N) grams, and the weight ratio of the organic material to the composite resin layer is M. / (M + N), and the weight ratio of the inorganic nano ceramic material in the composite resin layer is N / (M + N). The inorganic nano ceramic material has a weight ratio of the composite resin of between 30% and 90%.

In the present invention, different structural units use an organic material and an inorganic nano ceramic material, and since the inorganic nano ceramic material of the present invention is prepared by a sol-gel method, and the powder of the inorganic nano ceramic material The size is between 5 nm and 100 nm, so that on the surface of the inorganic nano ceramic material, there is a graft copolymer which has good reaction ability and can be chemically grafted with an organic material. The inorganic nano ceramic material is selected from the group consisting of nano alumina, nano cerium oxide, nano zirconia, nano titanium oxide and nano boron nitride. That is, the inorganic nano ceramic material is selected from a single nano alumina, or a single nano cerium oxide, or a single nano titanium oxide, or the inorganic nano ceramic material can be composed of nano alumina, nano Cerium oxide and nano titanium oxide are composed in different proportions.

The organic material is selected from the group consisting of epoxy resin, acrylic resin, oxime resin, fluorocarbon resin acid alcohol resin, amino resin, phenolic resin, and acrylic resin. Ethnic group. Preferably, the weight ratio of the organic material to the composite resin is between 10% and 70%.

The composite resin is formed into a gel-like composite resin gel by chemically grafting an inorganic nano ceramic material prepared by a sol-gel method with an organic material.

In the first embodiment, the structural reinforcing metal plate 100 is formed by laminating a pair of metal plates and a reinforcing layer. However, in fact, the structurally reinforced metal plate 100 may be formed by interlacing a pair of metal plates and a reinforcing layer in a staggered manner.

Referring now to Figure 2, there is shown a schematic view of a second embodiment of the structure of the structurally strengthened metal sheet 100 of the present invention. The second embodiment is substantially the same as the first embodiment. The main difference is that the structural reinforcing metal plate 100 has two pairs of metal plates and a reinforcing layer interlaced, that is, a metal plate 110; a reinforcing layer 120, which is adhered to Above the metal plate 110 of the layer. A metal plate 130 is attached to the reinforcing layer 120, and a reinforcing layer 140 is further attached to the metal plate 130. Although it is to be noted that the structurally reinforced metal plate 100 may be formed by interlacing a pair of metal plates and a reinforcing layer, for example, two pairs, three pairs or four pairs of metal plates are interlaced with the reinforcing layer. Forming a structurally strengthened metal sheet with higher strength.

Referring now to Figure 3, there is shown a flow chart of a method for fabricating the above-described structurally reinforced metal sheet. The manufacturing method comprises the following steps: Step 1: preparing an inorganic nano ceramic material, the inorganic nano ceramic material has a powder size of between 10 nm and 100 nm; and step 2: mixing an organic material with the The inorganic nano ceramic material forms a composite resin glue; step 3: mixing a fiber material and the composite resin glue; Step 4: coating the material of the fiber material and the composite resin glue on a metal plate; Step 5: curing the material mixed with the composite resin to form a strengthening layer on the metal plate; The composite resin is formed by chemical grafting of an organic material and an inorganic nano ceramic material, and the inorganic nano ceramic material has a powder size of between 5 nm and 100 nm.

It should be noted that the above steps illustrate that the structural reinforced metal plate 100 is a process in which a pair of metal plates are bonded to the reinforcing layer. In order to achieve the structural reinforcement metal plate 100 is a process of bonding a pair of metal plates and a reinforcement layer, wherein in step 4, a multi-layer structure step is further included, the step of coating the fiber material and the composite resin glue The mixed material is placed on a second metal plate, and the material of the fiber material mixed with the composite resin glue is again applied to the second metal plate to form a structure in which the multilayer metal plate and the multilayer reinforcing layer are interlaced.

In addition, it should be noted that in the structural reinforced metal plate 100 in which a plurality of pairs of metal plates and a reinforcing layer are bonded, the metal plates between the different layers may be formed of metal plates of different thicknesses and materials, and similarly, different layers The reinforcing layer between the two may be composed of different thicknesses and different proportions of constituent materials, that is, the ratio of the fibrous material to the composite resin in the reinforcing layer between the different layers may also be different.

In the first step, the inorganic nano ceramic material is prepared by using a nano ceramic solution and a heating process when prepared by a sol-gel method. Wherein, the nano ceramic solution is composed of at least one or more organometallic oxides and has a protecting group for stable storage of the nano ceramic solution.

The crystal structure of the inorganic nano ceramic material may be rock salt type, wurtzite type, sphalerite type, perovskite type, composite perovskite type, layered perovskite type, calcium-like type Titanium ore type, steel jade type, pyrochlore type, ilmenite type, rutile type, spinel type, anti-spinel type, fluorite type, anti-fluorite type, calcium chloride type, tungsten bronze type, One of lithium niobate type, bismuth citrate type and citrate type.

The chemical formula of the organometallic oxide may be (OR) _x MOM(OR) _x , (R) _y (OR) _xy MOM(OR) _xy (R) _y , M(OR) _x , M(OR) _xy (R _y and (OR) _x MOM(OR) _x , where x is the valence of the cation and y is the valence of the anion. Generally, the valence of the cation is between 1 and 6, and the valence of the anion is between 1 and 6. The M system may be selected from the group consisting of aluminum (Al), iron (Fe), titanium (Ti), zirconium (Zr), hafnium (Hf), cerium (Si), rhenium (Rh), cerium (Cs), platinum (Pt), One of metal elements such as indium (In), tin (Sn), gold (Au), germanium (Ge), copper (Cu) or tantalum (Ta). R may be one of an alkyl group, an alkenyl group, an aromatic group (Aryl), a haloalkyl group (Alkylhalide), and hydrogen (Hydrogen).

The prepared nano ceramic solution is added to the organic acid. The pH (pH value) of the nano ceramic solution is adjusted by an organic acid so that the pH is between 3 and 11, preferably between 4 and 10. After the condensation reaction of the organic acid with water, a gelatinous nano ceramic solution having a chemically grafted protecting group is formed, and the chemically grafted protecting group enables stable storage of the nano ceramic solution.

Preferably, the organic acid is of the formula R-(COOH), (HO)-R-(COOH), (HOOC)-R-(COOH) and (R ₁ O), (R ₂ O)-( POOH). R may be one of an alkyl group, an alkenyl group, an aryl group, a haloalkyl group or a hydrogen or alkynyl group. If R is an alkyl group, the organic acid is an alkanoic acid; if R is an alkenyl group, the organic acid is an olefinic acid; if R is an aromatic group, the organic acid is an aromatic acid; and if R is a haloalkyl group, the organic acid is Haloalkanic acid; if R is hydrogen, the organic acid is formic acid; if R is alkynyl, the organic acid is acetylenic acid. The inorganic acid may be one of hydrochloric acid, nitric acid or sulfuric acid.

Preferably, the chemical formula of the chemical grafting is A-(CO-B- CO)-C, which enables stable storage of the nano ceramic solution. Among them, the A system may be one of an alkyl group, an alkenyl group, an aromatic group, a haloalkyl group, a hydrogen group, and an alkynyl group. The B system may be one of an alkyl group, an alkenyl group, an aromatic group, a haloalkyl group, a hydrogen group, and an alkynyl group. The C system may be one of an alkyl group, an alkenyl group, an aromatic group, a haloalkyl group, a hydrogen group, and an alkynyl group.

In the second step, it is a feature of the present invention. The material of the composite resin is a Graft copolymers formed by chemical grafting of an organic material and an inorganic nano ceramic material. The graft copolymer is structurally a branched polymer having a main chain and a longer branch, and the main chain and the branch are composed of different structural units. Different effects can be achieved by controlling the ratio of the aqueous phase to the oil phase of the composite resin. In this embodiment, the composite resin is in the state of an oil phase.

In the third step, the composite resin is formed by chemical grafting of an organic material and an inorganic nano ceramic material, and can be well filled into the fiber material to form a reinforcing layer material having a very high strength.

In step four, the coating method includes a barrel plating method, a spin coating method, a immersion plating method, or a spray coating method. A preferred coating method is a barrel plating method in which a material obtained by mixing the fiber material and the composite resin glue by a roller coating is uniformly bonded to the metal plate 110.

Another common immersion plating method is a method in which the metal plate 110 is immersed in a groove containing a material mixed with the composite material and the composite resin. After the immersion is completed, the metal plate 110 is further The cantilever or the tray drops the excess coating solution back into the tank to achieve the recycling effect, and the batching method can be batch processed by the transportation belt, which is quite convenient. However, in this way, considerable care must be taken to control the circulation, filtration, and temperature and viscosity of the coating solution.

In the fifth step, the curing method comprises curing the layer between the metal plate 110 and the layer strengthening layer 120 via a heat curing process or a photo curing process. The effect is combined with the formation of the structurally strengthened metal sheet 100 having strength. The composite resin has an inorganic nano ceramic material and has special chemical ability. The metal plate does not require additional surface treatment, and the layer of the reinforcing layer and the metal plate can have good adhesion. The heat curing process or the photo-curing process can cause molecular bonding between the material containing the fiber material and the composite resin glue and the metal plate 110, thereby making the gel-like material and the composite resin The glue-mixed material can be smoothly joined to the metal plate 110 to form the layer of the reinforcing layer 120. Preferably, the temperature range of the heat curing process is between 50 ° C and 200 ° C; moreover, the heating process temperature range is between 80 ° C and 150 ° C.

In one embodiment of fabricating the structurally reinforced metal sheet 100, the layer of metal sheet 110, such as a metal aluminum sheet, is first subjected to a degreasing treatment to remove surface oil, and after washing with water, the surface of the layer of metal sheet 110 is kept clean. The layer of the metal plate 110 is immersed in the material of the present invention containing the fiber material and the composite resin glue for 2 minutes so that a material containing the fiber material and the composite resin glue is coated on the surface of the metal plate 110. The surface of the metal plate 110 was dried at 150 ° C for about 20 minutes.

In summary, the structural reinforced metal sheet 100 of the present invention has the following effects:

1. The composite resin is formed by chemical grafting of an organic material and an inorganic nano ceramic material, and can be well filled into a fiber material to form a strengthening layer having a very high strength.

2. The composite resin has an inorganic nano ceramic material and has special chemical ability. The metal plate does not require additional surface treatment, and the layer of the reinforcing layer and the metal plate can have good adhesion.

3. The thickness of the reinforcing layer of the present invention (100 micrometers to 2 centimeters) is comparable to the conventional one. The thickness of the edge layer is thin, so the amount of material can be reduced to reduce the cost.

Although the present invention has been disclosed in the foregoing preferred embodiments, it is not In order to limit the invention, any person skilled in the art without departing from the spirit and scope of the invention Within the perimeter, when you can make a variety of changes and modifications. As explained above, all types can be used. Modifications and changes without breaking the spirit of the invention. Therefore the protection of the present invention The scope is subject to the definition of the scope of the patent application attached.

Claims (12)

A structurally reinforced metal plate comprising: at least one metal plate; and at least one reinforcing layer bonded to the metal plate; wherein the reinforcing layer is formed of a fiber material and a composite resin, the composite resin is embedded in In the fiber material, the composite resin is a graft-like graft copolymer formed by chemically grafting an organic material and an inorganic nano ceramic material by catalytic reaction with water by an organic acid, and the inorganic nano-particles are formed. The ceramic material is selected from the group consisting of nano alumina prepared by a sol-gel method, nano zirconia, nano titanium oxide and nano boron nitride, and the powder size of the inorganic nano ceramic material is Between 5 nm and 100 nm; wherein the inorganic nano ceramic material is synthesized by using a nano ceramic solution in combination with a heating process, the nano ceramic solution being composed of at least one organic metal oxide Composition and has a protecting group. The structurally strengthened metal sheet of claim 1, wherein the organic acid is of the formula R-(COOH), (HO)-R-(COOH), (HOOC)-R-(COOH), and (R ₁ O And (R ₂ O)-(POOH), R may be an alkyl group, an alkenyl group, an aryl group, a haloalkyl group or a hydrogen or alkynyl group; if R is an alkyl group, the organic acid is an alkanoic acid; Is an alkenyl group, the organic acid is an olefinic acid; if R is an aromatic group, the organic acid is an aromatic acid; if R is a haloalkyl group, the organic acid is a haloalkanic acid; and if R is hydrogen, the organic acid is a formic acid; If R is an alkynyl group, the organic acid is an acetylene acid. The structurally strengthened metal sheet according to claim 1, wherein the chemical formula of the organic metal oxide is (OR) _x MOM(OR) _x , (R) _y (OR) _xy MOM(OR) _xy (R) _y , M(OR) _x , M(OR) _xy (R) _y and (OR) _x MOM(OR) _x , where x is the valence of the cation and y is the valence of the anion, and the valence of the cation is between 1 Between ~5 and the valence of the anion is between 1 and 6, the M system may be selected from one of metal elements such as aluminum (Al), titanium (Ti), and zirconium (Zr), and R may be an alkyl (Alkyl). One of a base, an alkenyl group, an aromatic group (Aryl), an alkylhalide, and a hydrogen. The structurally strengthened metal sheet according to claim 1, wherein the organic material is selected from the group consisting of epoxy resin, acrylic resin, oxime resin, fluorocarbon resin, acid alcohol resin, amino resin, phenol resin and acrylic resin. Ethnic group. The structurally strengthened metal sheet according to claim 1, wherein the inorganic nano ceramic material has a weight ratio of the composite resin of between 30% and 90%. The structurally reinforced metal sheet of claim 1, wherein the fibrous material is selected from the group consisting of carbon fiber materials, glass fiber materials, and plastic fiber materials. The structural reinforced metal sheet according to claim 1, wherein the metal sheet is one selected from the group consisting of aluminum, aluminum alloy, magnesium, magnesium alloy, titanium, titanium alloy, copper, copper alloy, low alloy steel, stainless steel and heat resistant alloy. . The structurally reinforced metal sheet of claim 1 wherein the layer of reinforcing layer has a thickness of between 100 microns and 2 cm. A method for fabricating a structurally strengthened metal sheet comprises the following steps: Step 1: preparing an inorganic nano ceramic material, the inorganic nano ceramic material having a powder size of between 10 nm and 100 nm; Mixing an organic material and the inorganic nano ceramic material to form a composite resin glue; Step 3: mixing a fiber material and the composite resin glue; Step 4: coating the fiber material and the composite resin glue material on a metal plate Step 5: curing the material of the fiber material mixed with the composite resin glue to Forming a strengthening layer on the metal plate; wherein the composite resin is a colloidal graft copolymer formed by chemical grafting of an organic material and an inorganic nano ceramic material by condensation of an organic acid with water. And the inorganic nano ceramic material is selected from the group consisting of nano alumina prepared by a sol-gel method, nano zirconia, nano titanium oxide and nano boron nitride, and the inorganic nano ceramic The powder size of the material is between 5 nm and 100 nm; wherein the inorganic nano ceramic material is synthesized by using a nano ceramic solution and a heating process, and the nano ceramic solution is composed of at least one type or more. It is composed of an organic metal oxide and has a protecting group. The method for producing a structurally strengthened metal sheet according to claim 9, wherein the organic acid has the formula R-(COOH), (HO)-R-(COOH), (HOOC)-R-(COOH), and R ₁ O), (R ₂ O)-(POOH), R may be an alkyl group, an alkenyl group, an aryl group, a haloalkyl group or a hydrogen or alkynyl group; if R is an alkyl group, the organic acid is an alkanoic acid If R is an alkenyl group, the organic acid is an olefinic acid; if R is an aromatic group, the organic acid is an aromatic acid; if R is a haloalkyl group, the organic acid is a haloalkanic acid; if R is a hydrogen, the organic acid Is formic acid; if R is alkynyl, the organic acid is acetylenic acid. The method for fabricating a structurally strengthened metal sheet according to claim 9, wherein the chemical formula of the organometallic oxide is (OR) _x MOM(OR) _x , (R) _y (OR) _xy MOM(OR) _xy (R _y , M(OR) _x , M(OR) _xy (R) _y and (OR) _x MOM(OR) _x , where x is the valence of the cation and y is the valence of the anion, the valence of the cation Between 1 and 5 and the valence of the anion is between 1 and 6, the M system may be selected from one of metal elements such as aluminum (Al), titanium (Ti), and zirconium (Zr), and R may be an alkane. (Alkyl) group, alkenyl group, aromatic group (Aryl), haloalkyl (Alkylhalide) and hydrogen (Hydrogen). The method for fabricating a structurally strengthened metal sheet according to claim 9, wherein in the step Fourth, further comprising a multi-layer structure step of placing a second metal plate on the material which is mixed with the composite material and the composite resin glue, and re-applying the material of the fiber material and the composite resin glue to the first Two metal plates are formed to form a structure in which a plurality of metal plates are interlaced with a plurality of reinforcing layers.