Wear-resistant and corrosion-resistant metal material for box body and preparation method thereof

Abstract

The invention relates to the technical field of aluminum alloy, in particular to a wear-resistant and corrosion-resistant metal material for a box and a preparation method thereof.The preparation method comprises the following steps that aluminum is melted at the temperature of 810-860 DEG C, then magnesium, silicon, copper, an aluminum-manganese alloy and an aluminum-yttrium alloy are added and mixed, smelting is conducted for 1.5-2.5 h, and an aluminum alloy melt is obtained; injecting into a mold, molding and quickly solidifying under the pressure intensity of 60-100MPa, taking out, and carrying out solution treatment and aging treatment to obtain a molded aluminum alloy; after the surface is polished, prime paint is sprayed to the surface and dried, and a prime paint layer is obtained; and mixing ceramic powder with a binder and water, coating the surface of the bottom coating layer with the mixture, drying, and sintering to obtain the wear-resistant and corrosion-resistant metal material for the box body. Through matching of the raw materials and the preparation steps, the material structure is optimized, the stability of the protective layer is improved, the wear resistance and corrosion resistance of the metal material are improved, and the method is suitable for industrial production.

Description

Technical Field

[0001] The present application relates to the technical field of aluminum alloys, and in particular to a wear-resistant and corrosion-resistant metal material for a box body and a preparation method thereof. Background Art

[0002] Aluminum alloy materials are light, have good thermal conductivity, and are easy to recycle. When used as the casing of medical equipment, they can significantly reduce the overall load, making it easy to carry or move, and have significant application value.

[0003] However, general aluminum alloys have low wear resistance and may be at risk of bumps or wear during long-term use or movement. In addition, although the oxide film on the surface of the aluminum alloy has a certain degree of corrosion resistance, when the aluminum alloy is exposed to moisture, salt spray, acid spray, alkaline spray and other environments for a long time, the oxide film on the surface of the aluminum alloy is easily destroyed, accelerating the corrosion of the aluminum alloy.

[0004] To further protect the surface of aluminum alloys, a protective coating is usually applied. However, after long-term wear, the coating becomes loose and easily falls off. Therefore, there is an urgent need to provide a more wear-resistant and corrosion-resistant aluminum alloy material for medical equipment housings. Summary of the Invention

[0005] The present application aims to overcome at least one of the defects of the prior art and provide a wear-resistant and corrosion-resistant metal material for a box body and a preparation method thereof. By matching raw materials and preparation steps, the material structure is optimized, the stability of the protective layer is improved, the wear resistance and corrosion resistance of the metal material are improved, and it is suitable for industrial production.

[0006] In a first aspect, the present invention provides a method for preparing a wear-resistant and corrosion-resistant metal material for a box body, which is achieved through the following technical solutions: A method for preparing a wear-resistant and corrosion-resistant metal material for a box body comprises the following steps: (1) 80-100 parts of aluminum are melted at a temperature of 810-860°C, and then 3-6 parts of magnesium, 5-10 parts of silicon, 2-4 parts of copper, 5-10 parts of aluminum-manganese alloy, and 6-8 parts of aluminum-yttrium alloy are added and mixed, and smelted for 1.5-2.5 hours to obtain an aluminum alloy melt; (2) The aluminum alloy melt is injected into the mold, formed and rapidly solidified under a pressure of 60-100 MPa, and then solution treated and aged to obtain a formed aluminum alloy. (3) After polishing the surface of the formed aluminum alloy, spray a primer onto the surface of the formed aluminum alloy and dry it to obtain a primer layer with a thickness of 20 μm to 50 μm; (4) The ceramic powder is mixed with a binder and water, and coated on the surface of the base coating layer described in step (3) to a thickness of 1-2 mm, dried, and sintered to obtain a wear-resistant and corrosion-resistant metal material for the box body.

[0007] According to an embodiment of the present application, a method for preparing a wear-resistant and corrosion-resistant metal material for a box body has at least the following beneficial effects: The preparation method of the present application prepares a formed aluminum alloy by first melting raw materials in a specific ratio and then rapidly solidifying them under high pressure. It is combined with spraying a primer, coating ceramic powder and sintering to facilitate improving the bonding strength between the aluminum alloy and the sintered ceramic layer, thereby enhancing the wear resistance and corrosion resistance of the aluminum alloy material.

[0008] The primer of the present application can improve the adhesion of the aluminum alloy surface, help to closely bond the ceramic powder with the formed aluminum alloy, facilitate subsequent sintering, and improve the stability of the aluminum alloy and the sintered ceramic layer.

[0009] The magnesium atoms in the present application dissolve in the aluminum matrix, causing lattice distortion and hindering dislocation movement, which can improve the strength and hardness of the alloy. At the same time, magnesium can promote the densification of the oxide film on the surface of the aluminum alloy and improve the corrosion resistance; silicon can reduce the melt viscosity, reduce the tendency of shrinkage holes, improve fluidity, and can also relieve solidification shrinkage stress and inhibit thermal cracking by forming Al-Si eutectic structure; in addition, magnesium and silicon can form Mg2Si strengthening phase, taking into account the strength and corrosion resistance of the aluminum alloy.

[0010] The manganese in the aluminum-manganese alloy of the present application can form a solid solution in aluminum, which has a solid solution strengthening effect. At the same time, it can form a dispersed intermetallic compound MnAl6 with aluminum, which hinders grain growth and refines the grains, thereby improving the strength of the aluminum alloy; in addition, the electrode potential of MnAl6 is similar to that of the matrix, and the corrosion current generated is very small, which has excellent corrosion resistance.

[0011] The yttrium in the aluminum-yttrium alloy of the present application can form refractory compounds with sulfur, oxygen, nitrogen, arsenic, etc. in aluminum, and most of it is discharged in the form of slag during the smelting process, which has a degassing effect, reduces the generation of pinholes in the casting, and improves the grain boundary strength; yttrium can also improve the heat resistance of the aluminum alloy, as well as the strength, elongation, and wear resistance of the aluminum alloy.

[0012] According to some embodiments of the present application, the weight percentage of manganese in the aluminum-manganese alloy in step (1) is 10%-20%.

[0013] According to some embodiments of the present application, the weight percentage of yttrium in the aluminum-yttrium alloy in step (1) is 6%-10%.

[0014] According to some embodiments of the present application, the smelting in step (1) is performed under vacuum or protective gas atmosphere. Smelting under vacuum or protective gas atmosphere can reduce hydrogen and impurity content and reduce intergranular corrosion.

[0015] Furthermore, the protective gas is selected from one of nitrogen, helium, neon and argon.

[0016] According to some embodiments of the present application, the temperature of the mold in step (2) is 300-400°C.

[0017] According to some embodiments of the present application, the temperature of the solution treatment in step (2) is 530-550°C.

[0018] According to some embodiments of the present application, the solution treatment time in step (2) is 8-16 hours.

[0019] According to some embodiments of the present application, the temperature of the aging treatment in step (2) is 170-190°C.

[0020] According to some embodiments of the present application, the aging treatment time in step (2) is 6-12 hours.

[0021] According to some embodiments of the present application, the primer in step (3) is prepared by mixing γ-aminopropyltriethoxysilane and triethyl phosphate in a weight ratio of 1:(1-2).

[0022] According to some embodiments of the present application, the raw materials for preparing the ceramic powder in step (4) include 45-75 parts of aluminum oxide, 5-15 parts of boron carbide, 4-10 parts of an inorganic binder, 5-10 parts of magnesium oxide, and 3-5 parts of zirconium dioxide.

[0023] Furthermore, the preparation of the inorganic adhesive includes the following steps: at a temperature of 60° C., 30-40 parts of sodium silicate and 40-60 parts of water are mixed according to weight, hydrolyzed for 180 minutes, cooled to 45° C., 10-20 parts of aluminum phosphate and 1-2 parts of a surfactant are added, and magnetic stirring is performed for 30 minutes to obtain an inorganic adhesive.

[0024] The combination of sodium silicate and aluminum phosphate can combine the advantages of both, improve high temperature resistance and enhance bonding strength, making it more suitable for the bonding of ceramics and metals, and improving wear resistance and corrosion resistance.

[0025] Furthermore, the surfactant is selected from one of ethanol, isopropyl alcohol, glycerol and citric acid.

[0026] Furthermore, the preparation of the ceramic powder in step (4) includes the following steps: Alumina, boron carbide, magnesium oxide and zirconium dioxide are mixed according to weight, smelted for 2-5 hours, poured into hydroxyethyl starch solution for water quenching, and filtered to obtain ceramic fragments; an inorganic binder is added, and the mixture is ground and dried to obtain ceramic powder.

[0027] According to some embodiments of the present application, the weight ratio of the ceramic powder to the binder and water in step (4) is (45-65):(0.5-2):(5-10).

[0028] According to some embodiments of the present application, the binder in step (4) is polyvinyl alcohol.

[0029] According to some embodiments of the present application, the sintering in step (4) is performed at a pressure of 60-100 MPa.

[0030] According to some embodiments of the present application, the sintering temperature in step (4) is 800-1200°C.

[0031] According to some embodiments of the present application, the sintering time in step (4) is 10-20 minutes.

[0032] In a second aspect, an embodiment of the present application provides a wear-resistant and corrosion-resistant metal material for a box body, which is manufactured using the above-mentioned method for preparing a wear-resistant and corrosion-resistant metal material for a box body.

[0033] The wear-resistant and corrosion-resistant metal material used for the box according to the embodiment of the present application has at least the following beneficial effects: The wear-resistant and corrosion-resistant metal material used for the box body of the present application optimizes the material structure by matching raw materials and preparation steps. The prepared aluminum alloy material has a dense structure and a stable protective layer, thereby improving the wear resistance and corrosion resistance of the aluminum alloy. DETAILED DESCRIPTION

[0034] To make the purpose, technical solutions and advantages of this application more clear, the following will be further described in detail with reference to specific embodiments. The embodiments described here are only part of the embodiments of this application and should not be understood as limiting the scope of protection of this application.

[0035] Example 1

[0036] Preparation of wear-resistant and corrosion-resistant metal materials for the box: (1) 90 parts of aluminum were melted at 840°C according to weight, and then 5 parts of magnesium, 8 parts of silicon, 3 parts of copper, 7 parts of aluminum-manganese alloy, and 7 parts of aluminum-yttrium alloy were added and mixed, and the mixture was smelted under a nitrogen protective gas atmosphere for 2 hours to obtain an aluminum alloy melt; (2) The aluminum alloy melt was injected into a mold at a temperature of 350°C, formed and rapidly solidified under a pressure of 80 MPa, and then solution treated at a temperature of 540°C for 12 h and aged at a temperature of 180°C for 9 h to obtain a formed aluminum alloy. (3) After polishing the surface of the formed aluminum alloy, spray a primer onto the surface of the formed aluminum alloy and dry it to obtain a primer layer with a thickness of 20 μm to 50 μm; (4) Ceramic powder is mixed with polyvinyl alcohol and water in a weight ratio of 55:1.2:8, and coated on the surface of the base coating layer described in step (3) to a thickness of 1-2 mm, dried, and sintered at a pressure of 80 MPa and a temperature of 1000°C for 15 minutes to obtain a wear-resistant and corrosion-resistant metal material for the box body; Wherein, the aluminum-manganese alloy in step (1) contains 85% aluminum and 15% manganese by weight; The aluminum-yttrium alloy in step (1) comprises 92% aluminum and 8% yttrium by weight; The primer in step (3) is prepared by mixing γ-aminopropyltriethoxysilane and triethyl phosphate in a weight ratio of 1:1.5; Preparation of the ceramic powder in step (4): 60 parts of aluminum oxide, 10 parts of boron carbide, 8 parts of magnesium oxide, and 4 parts of zirconium dioxide are mixed by weight, smelted for 3.5 hours, poured into a hydroxyethyl starch solution for water quenching, and filtered to obtain ceramic fragments; 7 parts of an inorganic binder are added, and the mixture is ground and dried to obtain ceramic powder; The inorganic adhesive is prepared by mixing 35 parts of sodium silicate and 50 parts of water according to parts by weight at a temperature of 60° C., hydrolyzing for 180 minutes, cooling to 45° C., adding 15 parts of aluminum phosphate and 1.5 parts of ethanol, and mixing by magnetic stirring for 30 minutes to obtain an inorganic adhesive.

[0037] Example 2

[0038] Preparation of wear-resistant and corrosion-resistant metal materials for the box: (1) 100 parts of aluminum were melted at 810°C according to weight, and then 6 parts of magnesium, 5 parts of silicon, 4 parts of copper, 5 parts of aluminum-manganese alloy, and 8 parts of aluminum-yttrium alloy were added and mixed, and the mixture was smelted under a nitrogen protective gas atmosphere for 1.5 hours to obtain an aluminum alloy melt; (2) The aluminum alloy melt is injected into a mold at a temperature of 400°C, formed and rapidly solidified under a pressure of 60 MPa, and then solution treated at a temperature of 550°C for 8 hours and aged at a temperature of 190°C for 6 hours to obtain a molded aluminum alloy; (3) After polishing the surface of the formed aluminum alloy, spray a primer onto the surface of the formed aluminum alloy and dry it to obtain a primer layer with a thickness of 20 μm to 50 μm; (4) Ceramic powder is mixed with polyvinyl alcohol and water in a weight ratio of 65:0.5:10, and the mixture is applied to the surface of the primer layer described in step (3) to a thickness of 1-2 mm. The mixture is dried and sintered at a pressure of 60 MPa and a temperature of 1200° C. for 10 min to obtain a wear-resistant and corrosion-resistant metal material for the box body; Wherein, the aluminum-manganese alloy in step (1) contains 90% aluminum and 10% manganese by weight; The aluminum-yttrium alloy in step (1) comprises 94% aluminum and 6% yttrium by weight; The primer in step (3) is prepared by mixing γ-aminopropyltriethoxysilane and triethyl phosphate in a weight ratio of 1:2; Preparation of the ceramic powder in step (4): 45 parts of aluminum oxide, 15 parts of boron carbide, 5 parts of magnesium oxide, and 5 parts of zirconium dioxide are mixed by weight, smelted for 2 hours, poured into a hydroxyethyl starch solution for water quenching, and filtered to obtain ceramic fragments; 10 parts of an inorganic binder are added, and the mixture is ground and dried to obtain ceramic powder; The inorganic adhesive is prepared by mixing 30 parts of sodium silicate and 60 parts of water according to parts by weight at a temperature of 60° C., hydrolyzing for 180 minutes, cooling to 45° C., adding 10 parts of aluminum phosphate and 2 parts of isopropyl alcohol, and mixing by magnetic stirring for 30 minutes to obtain an inorganic adhesive.

[0039] Example 3

[0040] Preparation of wear-resistant and corrosion-resistant metal materials for the box: (1) 80 parts of aluminum were melted at 860°C according to weight, and then 3 parts of magnesium, 10 parts of silicon, 2 parts of copper, 10 parts of aluminum-manganese alloy, and 6 parts of aluminum-yttrium alloy were added and mixed, and the mixture was smelted under a nitrogen protective gas atmosphere for 2.5 hours to obtain an aluminum alloy melt; (2) The aluminum alloy melt was injected into a mold at a temperature of 300°C, formed and rapidly solidified under a pressure of 100 MPa, and then solution treated at a temperature of 530°C for 16 hours and aged at a temperature of 170°C for 12 hours to obtain a formed aluminum alloy. (3) After polishing the surface of the formed aluminum alloy, spray a primer onto the surface of the formed aluminum alloy and dry it to obtain a primer layer with a thickness of 20 μm to 50 μm; (4) Ceramic powder is mixed with polyvinyl alcohol and water in a weight ratio of 45:2:5, and coated on the surface of the primer layer described in step (3) to a thickness of 1-2 mm, dried, and sintered at a pressure of 100 MPa and a temperature of 800°C for 20 minutes to obtain a wear-resistant and corrosion-resistant metal material for the box body; Wherein, the aluminum-manganese alloy in step (1) contains 80% aluminum and 20% manganese by weight; The aluminum-yttrium alloy in step (1) comprises 90% aluminum and 10% yttrium by weight; The primer in step (3) is prepared by mixing γ-aminopropyltriethoxysilane and triethyl phosphate in a weight ratio of 1:1; Preparation of the ceramic powder in step (4): 75 parts of aluminum oxide, 5 parts of boron carbide, 10 parts of magnesium oxide, and 3 parts of zirconium dioxide are mixed by weight, smelted for 5 hours, poured into a hydroxyethyl starch solution for water quenching, and filtered to obtain ceramic fragments; 4 parts of an inorganic binder are added, and the mixture is ground and dried to obtain ceramic powder; The inorganic adhesive is prepared by mixing 40 parts of sodium silicate and 40 parts of water according to weight at a temperature of 60° C., hydrolyzing for 180 minutes, cooling to 45° C., adding 20 parts of aluminum phosphate and 1 part of glycerol, and mixing with magnetic stirring for 30 minutes to obtain an inorganic adhesive.

[0041] Example 4

[0042] Preparation of wear-resistant and corrosion-resistant metal materials for the box: (1) 90 parts of aluminum were melted at 850°C according to weight, and then 5 parts of magnesium, 6 parts of silicon, 3 parts of copper, 6 parts of aluminum-manganese alloy, and 7 parts of aluminum-yttrium alloy were added and mixed, and the mixture was smelted under a nitrogen protective gas atmosphere for 2 hours to obtain an aluminum alloy melt; (2) The aluminum alloy melt was injected into a mold at a temperature of 350°C, formed and rapidly solidified under a pressure of 80 MPa, and then solution treated at a temperature of 540°C for 14 h and aged at a temperature of 180°C for 10 h to obtain a formed aluminum alloy; (3) After polishing the surface of the formed aluminum alloy, spray a primer onto the surface of the formed aluminum alloy and dry it to obtain a primer layer with a thickness of 20 μm to 50 μm; (4) Ceramic powder is mixed with polyvinyl alcohol and water in a weight ratio of 60:1:8, and coated on the surface of the base coating layer described in step (3) to a thickness of 1-2 mm, dried, and sintered at a pressure of 80 MPa and a temperature of 1000°C for 18 minutes to obtain a wear-resistant and corrosion-resistant metal material for the box body; Wherein, the aluminum-manganese alloy in step (1) contains 84% aluminum and 16% manganese by weight; The aluminum-yttrium alloy in step (1) comprises 91% aluminum and 9% yttrium by weight; The primer in step (3) is prepared by mixing γ-aminopropyltriethoxysilane and triethyl phosphate in a weight ratio of 1:2; Preparation of the ceramic powder in step (4): 55 parts of aluminum oxide, 10 parts of boron carbide, 7 parts of magnesium oxide, and 4 parts of zirconium dioxide are mixed by weight, smelted for 4 hours, poured into a hydroxyethyl starch solution for water quenching, and filtered to obtain ceramic fragments; 8 parts of an inorganic binder are added, and the mixture is ground and dried to obtain ceramic powder; The inorganic adhesive is prepared by mixing 35 parts of sodium silicate and 50 parts of water according to parts by weight at a temperature of 60° C., hydrolyzing for 180 minutes, cooling to 45° C., adding 15 parts of aluminum phosphate and 2 parts of citric acid, and mixing by magnetic stirring for 30 minutes to obtain an inorganic adhesive.

[0043] Comparative Example 1 Preparation of wear-resistant and corrosion-resistant metal materials for the box: (1) 90 parts of aluminum were melted at 840°C according to weight, and then 5 parts of magnesium, 8 parts of silicon, 3 parts of copper, 7 parts of aluminum-manganese alloy, and 7 parts of aluminum-yttrium alloy were added and mixed, and the mixture was smelted under a nitrogen protective gas atmosphere for 2 hours to obtain an aluminum alloy melt; (2) The aluminum alloy melt was injected into a mold at a temperature of 350°C, formed and rapidly solidified under a pressure of 80 MPa, and then solution treated at a temperature of 540°C for 12 h and aged at a temperature of 180°C for 9 h to obtain a formed aluminum alloy. (3) Grinding the surface of the formed aluminum alloy; (4) The ceramic powder is mixed with polyvinyl alcohol and water in a weight ratio of 55:1.2:8, and the mixture is coated on the surface of the formed aluminum alloy described in step (3) to a thickness of 1-2 mm, dried, and sintered at a pressure of 80 MPa and a temperature of 1000°C for 15 minutes to obtain a wear-resistant and corrosion-resistant metal material for the box body; Wherein, the aluminum-manganese alloy in step (1) contains 85% aluminum and 15% manganese by weight; The aluminum-yttrium alloy in step (1) comprises 92% aluminum and 8% yttrium by weight; The primer in step (3) is prepared by mixing γ-aminopropyltriethoxysilane and triethyl phosphate in a weight ratio of 1:1.5; Preparation of the ceramic powder in step (4): 60 parts of aluminum oxide, 10 parts of boron carbide, 8 parts of magnesium oxide, and 4 parts of zirconium dioxide are mixed by weight, smelted for 3.5 hours, poured into a hydroxyethyl starch solution for water quenching, and filtered to obtain ceramic fragments; 7 parts of an inorganic binder are added, and the mixture is ground and dried to obtain ceramic powder; The inorganic adhesive is prepared by mixing 35 parts of sodium silicate and 50 parts of water according to parts by weight at a temperature of 60° C., hydrolyzing for 180 minutes, cooling to 45° C., adding 15 parts of aluminum phosphate and 1.5 parts of ethanol, and mixing by magnetic stirring for 30 minutes to obtain an inorganic adhesive.

[0044] Comparative Example 2 Preparation of wear-resistant and corrosion-resistant metal materials for the box: (1) 90 parts of aluminum were melted at 840°C according to weight, and then 5 parts of magnesium, 8 parts of silicon, 3 parts of copper, 7 parts of aluminum-manganese alloy, and 7 parts of aluminum-yttrium alloy were added and mixed, and the mixture was smelted under a nitrogen protective gas atmosphere for 2 hours to obtain an aluminum alloy melt; (2) The aluminum alloy melt was injected into a mold at a temperature of 350°C, formed and rapidly solidified under a pressure of 80 MPa, and then solution treated at a temperature of 540°C for 12 h and aged at a temperature of 180°C for 9 h to obtain a formed aluminum alloy. (3) After polishing the surface of the formed aluminum alloy, spray a primer onto the surface of the formed aluminum alloy and dry it to obtain a primer layer with a thickness of 20 μm to 50 μm; (4) Ceramic powder is mixed with polyvinyl alcohol and water in a weight ratio of 55:1.2:8, and coated on the surface of the base coating layer described in step (3) to a thickness of 1-2 mm, dried, and sintered at a pressure of 80 MPa and a temperature of 1000°C for 15 minutes to obtain a wear-resistant and corrosion-resistant metal material for the box body; Wherein, the aluminum-manganese alloy in step (1) contains 85% aluminum and 15% manganese by weight; The aluminum-yttrium alloy in step (1) comprises 92% aluminum and 8% yttrium by weight; The primer in step (3) is prepared by mixing γ-aminopropyltriethoxysilane and triethyl phosphate in a weight ratio of 1:1.5; Preparation of the ceramic powder in step (4): 60 parts of aluminum oxide, 10 parts of boron carbide, 8 parts of magnesium oxide, and 4 parts of zirconium dioxide are mixed by weight, smelted for 3.5 hours, poured into a hydroxyethyl starch solution for water quenching, and filtered to obtain ceramic fragments; 7 parts of an inorganic binder are added, and the mixture is ground and dried to obtain ceramic powder; The inorganic adhesive is prepared by mixing 35 parts of sodium silicate and 50 parts of water according to weight at a temperature of 60° C., and hydrolyzing the mixture for 180 minutes to obtain an inorganic adhesive.

[0045] Comparative Example 3 Preparation of wear-resistant and corrosion-resistant metal materials for the box: (1) 90 parts of aluminum were melted at 840°C according to weight, and then 5 parts of magnesium, 8 parts of silicon, 3 parts of copper, and 7 parts of aluminum-yttrium alloy were added and mixed, and the mixture was smelted under a nitrogen protective gas atmosphere for 2 hours to obtain an aluminum alloy melt; (2) The aluminum alloy melt was injected into a mold at a temperature of 350°C, formed and rapidly solidified under a pressure of 80 MPa, and then solution treated at a temperature of 540°C for 12 h and aged at a temperature of 180°C for 9 h to obtain a formed aluminum alloy. (3) After polishing the surface of the formed aluminum alloy, spray a primer onto the surface of the formed aluminum alloy and dry it to obtain a primer layer with a thickness of 20 μm to 50 μm; (4) Ceramic powder is mixed with polyvinyl alcohol and water in a weight ratio of 55:1.2:8, and coated on the surface of the base coating layer described in step (3) to a thickness of 1-2 mm, dried, and sintered at a pressure of 80 MPa and a temperature of 1000°C for 15 minutes to obtain a wear-resistant and corrosion-resistant metal material for the box body; Wherein, the aluminum-manganese alloy in step (1) contains 85% aluminum and 15% manganese by weight; The aluminum-yttrium alloy in step (1) comprises 92% aluminum and 8% yttrium by weight; The primer in step (3) is prepared by mixing γ-aminopropyltriethoxysilane and triethyl phosphate in a weight ratio of 1:1.5; Preparation of the ceramic powder in step (4): 60 parts of aluminum oxide, 10 parts of boron carbide, 8 parts of magnesium oxide, and 4 parts of zirconium dioxide are mixed by weight, smelted for 3.5 hours, poured into a hydroxyethyl starch solution for water quenching, and filtered to obtain ceramic fragments; 7 parts of an inorganic binder are added, and the mixture is ground and dried to obtain ceramic powder; The inorganic adhesive is prepared by mixing 35 parts of sodium silicate and 50 parts of water according to parts by weight at a temperature of 60° C., hydrolyzing for 180 minutes, cooling to 45° C., adding 15 parts of aluminum phosphate and 1.5 parts of ethanol, and mixing by magnetic stirring for 30 minutes to obtain an inorganic adhesive.

[0046] Experimental example The wear-resistant and corrosion-resistant metal materials for the box prepared in Examples 1-4 and Comparative Examples 1-3 were tested for their tensile strength, yield strength, friction resistance, and corrosion resistance. The test methods are as follows: The tensile strength is tested in accordance with GB / T 16865-2023.

[0047] The yield strength is tested according to GB / T 3880.2-2006.

[0048] The abrasion resistance is tested in accordance with GB / T 12967.1-2020.

[0049] The corrosion resistance is tested according to the standard of GB / T 9274-1988.

[0050] The test data is shown in Table 1 below: Table 1

[0051] As can be seen from Table 1, the wear-resistant and corrosion-resistant metal materials used for the box prepared in Examples 1-4 of the present application have good strength, friction resistance and corrosion resistance.

[0052] No primer was sprayed during the preparation process of Comparative Example 1, and the rest was the same as Example 1. The tensile strength, yield strength, and abrasion resistance of the wear-resistant and corrosion-resistant metal material for the box prepared in Comparative Example 1 were significantly inferior to those in Example 1 of the present application, indicating that the primer of the present application can improve the adhesion of the aluminum alloy surface, facilitate the close bonding between the ceramic powder and the formed aluminum alloy, facilitate subsequent sintering, and improve the stability of the aluminum alloy and the sintered ceramic layer.

[0053] In the preparation of the ceramic powder of Comparative Example 2, no aluminum phosphate and ethanol were added to the raw materials of the inorganic adhesive, and the rest were the same as in Example 1. The tensile strength, yield strength, abrasion resistance and corrosion resistance of the wear-resistant and corrosion-resistant metal material for the box prepared in Comparative Example 2 were not as good as those in Example 1 of the present application, indicating that the sodium silicate and aluminum phosphate of the present application are used in combination, which can combine the advantages of both, improve high temperature resistance, enhance bonding strength, and be more suitable for the combination of ceramics and metals, thereby improving wear resistance and corrosion resistance.

[0054] The preparation raw materials of Comparative Example 3 do not contain aluminum-manganese alloy, and the rest are the same as Example 1. The tensile strength, yield strength, friction resistance and corrosion resistance of the wear-resistant and corrosion-resistant metal material for the box prepared in Comparative Example 3 are not as good as those in Example 1 of the present application, indicating that the manganese in the aluminum-manganese alloy of the present application can form a solid solution in aluminum, which has a solid solution strengthening effect, and can form a dispersed intermetallic compound MnAl6 with aluminum, which hinders grain growth and refines the grains, thereby improving the strength of the aluminum alloy; in addition, the electrode potential of MnAl6 is similar to that of the substrate, the corrosion current generated is very small, and it has excellent corrosion resistance.

[0055] Although the embodiments of the present application have been shown and described, those skilled in the art will understand that various changes, modifications, substitutions or variations may be made to these embodiments without departing from the principles and purpose of the present application, and that the technical solutions after these changes, modifications, substitutions or variations will fall within the scope of protection of the present application.

Claims

1. A method for preparing a wear-resistant and corrosion-resistant metal material for a box, characterized in that: The following steps are involved: (1) 80-100 parts of aluminum are melted at a temperature of 810-860°C, and then 3-6 parts of magnesium, 5-10 parts of silicon, 2-4 parts of copper, 5-10 parts of aluminum-manganese alloy, and 6-8 parts of aluminum-yttrium alloy are added and mixed, and smelted for 1.5-2.5 hours to obtain an aluminum alloy melt; (2) The aluminum alloy melt is injected into the mold, formed and rapidly solidified under a pressure of 60-100 MPa, and then solution treated and aged to obtain a formed aluminum alloy. (3) After polishing the surface of the formed aluminum alloy, spray a primer onto the surface of the formed aluminum alloy and dry it to obtain a primer layer with a thickness of 20 μm to 50 μm; (4) The ceramic powder is mixed with a binder and water, and coated on the surface of the base coating layer described in step (3) to a thickness of 1-2 mm, dried, and sintered to obtain a wear-resistant and corrosion-resistant metal material for the box body.

2. The method for preparing a wear-resistant and corrosion-resistant metal material for a box according to claim 1, characterized in that: The primer in step (3) is prepared by mixing γ-aminopropyltriethoxysilane and triethyl phosphate in a weight ratio of 1:(1-2).

3. The method for preparing a wear-resistant and corrosion-resistant metal material for a box according to claim 1, characterized in that: The raw materials for preparing the ceramic powder in step (4) include 45-75 parts of aluminum oxide, 5-15 parts of boron carbide, 4-10 parts of an inorganic binder, 5-10 parts of magnesium oxide, and 3-5 parts of zirconium dioxide.

4. The method for preparing a wear-resistant and corrosion-resistant metal material for a box according to claim 3, characterized in that: The preparation of the inorganic adhesive comprises the following steps: mixing 30-40 parts of sodium silicate and 40-60 parts of water by weight at 60° C., hydrolyzing for 180 minutes, cooling to 45° C., adding 10-20 parts of aluminum phosphate and 1-2 parts of a surfactant, and mixing by magnetic stirring for 30 minutes to obtain the inorganic adhesive.

5. The method for preparing a wear-resistant and corrosion-resistant metal material for a box according to claim 3, characterized in that: The preparation of the ceramic powder in step (4) comprises the following steps: Alumina, boron carbide, magnesium oxide, and zirconium dioxide are mixed according to weight, smelted for 2-5 hours, poured into a hydroxyethyl starch solution for water quenching, and filtered to obtain ceramic fragments; An inorganic binder is added, and ceramic powder is obtained through grinding and drying.

6. The method for preparing a wear-resistant and corrosion-resistant metal material for a box according to claim 1, characterized in that: The weight ratio of the ceramic powder, binder and water in step (4) is (45-65):(0.5-2):(5-10).

7. The method for preparing a wear-resistant and corrosion-resistant metal material for a box according to claim 1, characterized in that: The weight percentage of manganese in the aluminum-manganese alloy of step (1) is 10%-20%, and / or the weight percentage of yttrium in the aluminum-yttrium alloy of step (1) is 6%-10%.

8. The method for preparing a wear-resistant and corrosion-resistant metal material for a box according to claim 1, characterized in that: The sintering in step (4) is carried out at a pressure of 60-100 MPa.

9. The method for preparing a wear-resistant and corrosion-resistant metal material for a box according to claim 1, characterized in that: The sintering temperature in step (4) is 800-1200° C., and / or the sintering time in step (4) is 10-20 minutes.

10. A wear-resistant and corrosion-resistant metal material for a box body produced by the method for producing a wear-resistant and corrosion-resistant metal material for a box body according to any one of claims 1 to 9.

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