Preparation method of high-toughness aluminum alloy material for new energy automobile

Abstract

The invention belongs to the technical field of aluminum alloy preparation, and particularly relates to a preparation method of a high-toughness aluminum alloy material for a new energy automobile. The high-strength and high-toughness aluminum alloy material for the new energy automobile is prepared from the following composition raw materials in percentage by mass: 1.25 to 1.75 percent of molybdenum, 0.55 to 1.45 percent of nickel, 0.14 to 0.35 percent of manganese, 0.185 to 0.278 percent of tungsten, 0.05 to 0.1 percent of copper, 0.35 to 0.65 percent of iridium, 0.1 to 0.5 percent of toughening agent and the balance of aluminum and other inevitable impurities, and the content of the impurities is not higher than 0.01 percent. The invention further discloses a preparation method of the aluminum alloy material. The aluminum alloy has the characteristic of high toughness and can be widely applied to manufacturing of new energy automobiles.

Description

Technical Field

[0001] This invention belongs to the field of aluminum alloy preparation technology, and more specifically, relates to a method for preparing high-strength and high-toughness aluminum alloy materials for new energy vehicles. Background Technology

[0002] Aluminum is one of the most widely distributed and abundant metallic elements in the Earth's crust, accounting for approximately 8.20% of its total mass. It typically exists in complex silicate forms. Alloys based on aluminum with the addition of certain amounts of other alloying elements are lightweight metal materials. In addition to the general properties of aluminum, aluminum alloys possess specific alloying characteristics due to variations in the types and amounts of alloying elements added. Based on the excellent corrosion resistance, high specific strength, good formability, and low cost of aluminum alloys, they have wide applications in aerospace, automotive, machinery manufacturing, shipbuilding, and chemical industries.

[0003] New energy vehicles are the focus of future automotive industry development. Under the major demands of energy conservation, emission reduction and continuous improvement of the driving range of new energy vehicles, vehicle lightweighting is currently the most direct and effective means, and it is also of great significance to promoting energy conservation and emission reduction.

[0004] Therefore, developing a high-strength and high-toughness aluminum alloy material is of great significance for achieving the goals of low cost and lightweighting of new energy vehicles. Summary of the Invention

[0005] The purpose of this invention is to overcome the problems existing in the prior art and provide a method for preparing a high-strength and high-toughness aluminum alloy material for new energy vehicles. The aluminum alloy of this invention possesses high strength and toughness characteristics and can be widely used in the manufacture of new energy vehicles.

[0006] The objective of this invention and the technical problem it solves are achieved by the following technical solutions.

[0007] One aspect of the present invention provides a high-strength and high-toughness aluminum alloy material for new energy vehicles. The alloy material, by mass percentage, comprises the following constituent raw materials: 1.25–1.75% molybdenum, 0.55–1.45% nickel, 0.14–0.35% manganese, 0.185–0.278% tungsten, 0.05–0.1% copper, 0.35–0.65% iridium, 0.1–0.5% toughening agent, and the balance being aluminum and other unavoidable impurities, the impurity content of which is not higher than 0.01%.

[0008] In some embodiments, the method for preparing the toughening agent includes:

[0009] Tourmaline and ferrosilicon copolymer were mixed in a mass ratio of 1:3 to 5, pulverized, and calcined at 600 to 800°C for 4 to 6 hours. After cooling to room temperature, the resulting product was ground, dried, and passed through an 800 to 1000 mesh sieve to obtain a mixed powder.

[0010] The obtained mixed powder was ultrasonically dispersed in a 40-50 wt% polyglycerol aqueous solution, and sodium periodate was added under light-protected conditions and stirred to obtain product I.

[0011] Butyl rubber and carboxylic acid ester are mixed at a volume ratio of 1:1 to 2 to obtain a rubber solution. Product I, titanium dioxide and the rubber solution are mixed at a mass-volume ratio of 1g:0.01 to 0.05g:2 to 5mL. The mixture is stirred at 40 to 60°C for 8 to 12 hours. After stirring, the mixture is allowed to stand for 6 to 8 hours. The resulting rubber compound is then extruded, dehydrated and dried to obtain a toughening agent.

[0012] In some embodiments, the tourmaline is selected from any one of magnesium tourmaline, iron tourmaline, iron-magnesium tourmaline, and calcium-magnesium tourmaline.

[0013] In some embodiments, the ferrosilicon copolymer is formed by polymerizing sodium silicate and ferrate in a molar ratio of 3 to 5:1.

[0014] In some embodiments, the sodium periodate is added at a mass-to-volume ratio of 1 g to 3-5 mL with polyglycerol.

[0015] In some embodiments, the butyl rubber is an aqueous butyl rubber latex LE-50.

[0016] In some embodiments, the carboxylic ester is selected from any one of butyl methacrylate, dibutyl maleate, isooctyl acrylate, and dioctyl maleate.

[0017] Another aspect of the present invention provides a method for preparing a high-strength and high-toughness aluminum alloy material for new energy vehicles as described above, the method comprising the following steps:

[0018] 1) Weigh each raw material according to the proportion, grind each raw material separately, and then pass them through a 1000-mesh sieve to obtain ultrafine raw material powder;

[0019] 2) Mix all raw material powders except for the toughening agent evenly, and then ball mill at low speed to obtain the first grinding product;

[0020] 3) The obtained first grinding product is subjected to high-speed ball milling to obtain the second grinding product;

[0021] 4) The obtained second grinding product is mixed evenly with toughening agent powder, and then pressed, kept warm and cooled in sequence to obtain high strength and toughness aluminum alloy material.

[0022] In some embodiments, the low-speed ball milling conditions in step 2) are: rotation speed 100-300 rpm, time 10-20 h.

[0023] In some embodiments, the high-speed ball milling conditions in step 3) are: rotation speed of 800-1200 rpm and time of 2-4 h.

[0024] Another aspect of the present invention provides an application of an aluminum alloy material prepared according to the aforementioned aluminum alloy material or preparation method in the field of new energy vehicles.

[0025] By employing the above technical solution, the present invention has at least the following advantages:

[0026] 1. This invention uses high-strength metal raw materials such as molybdenum, tungsten, and iridium to mix with aluminum to prepare aluminum alloy materials. These alloy materials are not only lightweight but also have the advantages of high strength and toughness, making them very suitable for the preparation of new energy vehicles.

[0027] 2. This invention adds a toughening agent to the original formula, which further improves the tensile strength and toughness of the aluminum alloy. The toughening agent of this invention uses tourmaline and ferrosilicon copolymer as the main raw materials. The surface of the tourmaline and ferrosilicon copolymer mixed powder is modified by placing it in an oxidizing reaction environment between polyglycerol and sodium periodate. Finally, a mixture of butyl rubber and carboxylic acid ester is copolymerized under the action of titanium dioxide catalyst to obtain a tourmaline and ferrosilicon copolymer composite material coated with copolymer. This composite material, used as a toughening agent, can significantly improve the strength, corrosion resistance, and heat resistance of the alloy. Furthermore, the toughening agent used in this invention contains various metallic elements, such as sodium, magnesium, iron, manganese, aluminum, and lithium contained in tourmaline, silicon and iron contained in ferrosilicon copolymer, and titanium. The addition of these metallic elements can increase the content of other metals in the aluminum alloy, improve product performance, reduce raw material usage, and lower production costs.

[0028] The above description is merely an overview of the technical solution of the present invention. In order to better understand the technical means of the present invention and to implement it in accordance with the contents of the specification, the preferred embodiments of the present invention are described in detail below. Detailed Implementation

[0029] To make the technical means, creative features, achieved objectives, and effects of this invention readily understandable, the technical solutions in the embodiments of this invention will be clearly and completely described below in conjunction with the embodiments of this invention. Obviously, the described embodiments are merely some embodiments of this invention, and not all embodiments. Based on the embodiments of this invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this invention.

[0030] Unless otherwise specified, the experimental methods used in the following examples are all conventional methods.

[0031] Unless otherwise specified, the aqueous butyl rubber latex LE-50 used in the following examples was purchased from Shandong Lier New Materials Co., Ltd.; other materials and reagents are commercially available.

[0032] Example 1:

[0033] In this embodiment, a high-strength and high-toughness aluminum alloy material for new energy vehicles is provided. By mass percentage, the alloy material contains the following constituent raw materials: 1.5% molybdenum, 1.0% nickel, 0.245% manganese, 0.2315% tungsten, 0.075% copper, 0.5% iridium, 0.3% toughening agent, and the balance being aluminum and other unavoidable impurities, the impurity content of which is not higher than 0.01%.

[0034] A method for preparing a high-strength and high-toughness aluminum alloy material for new energy vehicles, the method comprising the following steps:

[0035] 1) Magnesium tourmaline and ferrosilicon copolymer (formed by polymerization of sodium silicate and ferrate at a molar ratio of 4:1) were mixed in a mass ratio of 1:4. After pulverization, the mixture was calcined at 700℃ for 5 hours, then cooled to room temperature. The resulting product was ground, dried, and passed through a 900-mesh sieve to obtain a mixed powder. The mixed powder was ultrasonically dispersed in a 45wt% polyglycerol aqueous solution at a mass-volume ratio of 1g:7.5mL. Sodium periodate (added at a mass-volume ratio of 1g:4mL to polyglycerol) was added under light-protected conditions, and the mixture was stirred to obtain product I. Aqueous butyl rubber latex LE-50 and butyl methacrylate were mixed at a volume ratio of 1:1.5 to obtain a rubber solution. Product I, titanium dioxide, and the rubber solution were mixed at a mass-volume ratio of 1g:0.03g:3.5mL and stirred at 50℃ for 10 hours. After stirring, the mixture was allowed to stand for 7 hours. The resulting rubber compound was extruded, dehydrated, and dried to obtain a toughening agent.

[0036] 2) Weigh each raw material according to the proportion, grind each raw material separately, and then pass them through a 1000-mesh sieve to obtain ultrafine raw material powder. Mix all raw material powders except for the toughening agent evenly, and then ball mill at 200 rpm for 15 hours to obtain the first grinding product. Ball mill the first grinding product at 1000 rpm for 3 hours to obtain the second grinding product. Mix the second grinding product with the toughening agent powder evenly, and press the resulting mixture into ingots under a pressure of 60T. Hold the ingots at 170℃ under vacuum for 14 hours, and finally cool them to room temperature to obtain a high-strength and high-toughness aluminum alloy material.

[0037] Example 2:

[0038] In this embodiment, a high-strength and high-toughness aluminum alloy material for new energy vehicles is provided. By mass percentage, the alloy material contains the following constituent raw materials: 1.25% molybdenum, 1.45% nickel, 0.14% manganese, 0.278% tungsten, 0.05% copper, 0.65% iridium, 0.1% toughening agent, and the balance being aluminum and other unavoidable impurities, the impurity content of which is not higher than 0.01%.

[0039] A method for preparing a high-strength and high-toughness aluminum alloy material for new energy vehicles, the method comprising the following steps:

[0040] 1) Ferro-tourmaline and ferrosilicon copolymer (formed by polymerization of sodium silicate and ferrate at a molar ratio of 3:1) were mixed at a mass ratio of 1:5. After pulverization, the mixture was calcined at 600℃ for 6 hours, then cooled to room temperature. The resulting product was ground, dried, and passed through an 800-mesh sieve to obtain a mixed powder. The mixed powder was ultrasonically dispersed in a 50wt% polyglycerol aqueous solution at a mass-volume ratio of 1g:5mL. Sodium periodate (added at a mass-volume ratio of 1g:3mL to polyglycerol) was added under light-protected conditions, and the mixture was stirred to obtain product I. Aqueous butyl rubber latex LE-50 and isooctyl acrylate were mixed at a volume ratio of 1:2 to obtain a rubber solution. Product I, titanium dioxide, and the rubber solution were mixed at a mass-volume ratio of 1g:0.01g:2mL and stirred at 60℃ for 8 hours. After stirring, the mixture was allowed to stand for 8 hours. The resulting rubber compound was extruded, dehydrated, and dried to obtain a toughening agent.

[0041] 2) Weigh each raw material according to the proportion, grind each raw material separately, and then pass them through a 1000-mesh sieve to obtain ultrafine raw material powder. Mix all raw material powders except for the toughening agent evenly, and then ball mill at 100 rpm for 20 hours to obtain the first grinding product. Ball mill the obtained first grinding product at 1200 rpm for 2 hours to obtain the second grinding product. Mix the obtained second grinding product with the toughening agent powder evenly, and press the resulting mixture into ingots under a pressure of 70T. Hold the resulting ingots at 160℃ under vacuum for 16 hours, and finally cool them to room temperature to obtain high-strength and high-toughness aluminum alloy material.

[0042] Example 3:

[0043] In this embodiment, a high-strength and high-toughness aluminum alloy material for new energy vehicles is provided. By mass percentage, the alloy material contains the following constituent raw materials: 1.75% molybdenum, 0.55% nickel, 0.35% manganese, 0.185% tungsten, 0.1% copper, 0.35% iridium, 0.5% toughening agent, and the balance aluminum and other unavoidable impurities, the impurity content of which is not higher than 0.01%.

[0044] A method for preparing a high-strength and high-toughness aluminum alloy material for new energy vehicles, the method comprising the following steps:

[0045] 1) Iron-magnesium tourmaline and ferrosilicon copolymer (formed by polymerization of sodium silicate and ferrate at a molar ratio of 5:1) were mixed in a mass ratio of 1:3. After pulverization, the mixture was calcined at 800℃ for 4 hours, then cooled to room temperature. The resulting product was ground, dried, and passed through a 1000-mesh sieve to obtain a mixed powder. The resulting mixed powder was ultrasonically dispersed in a 40wt% polyglycerol aqueous solution at a mass-volume ratio of 1g:10mL. Sodium periodate (added at a mass-volume ratio of 1g:5mL to polyglycerol) was added under light-protected conditions, and the mixture was stirred to obtain product I. Aqueous butyl rubber latex LE-50 and dibutyl maleate were mixed at a volume ratio of 1:1 to obtain a rubber solution. Product I, titanium dioxide, and the rubber solution were mixed at a mass-volume ratio of 1g:0.05g:5mL and stirred at 40℃ for 12 hours. After stirring, the mixture was allowed to stand for 6 hours. The resulting rubber compound was extruded, dehydrated, and dried to obtain a toughening agent.

[0046] 2) Weigh each raw material according to the proportion, grind each raw material separately, and then pass them through a 1000-mesh sieve to obtain ultrafine raw material powder. Mix all raw material powders except for the toughening agent evenly, and then ball mill at 300 rpm for 10 hours to obtain the first grinding product. Ball mill the obtained first grinding product at 800 rpm for 4 hours to obtain the second grinding product. Mix the obtained second grinding product with the toughening agent powder evenly, and press the resulting mixture into ingots under a pressure of 50T. Hold the resulting ingots at 180℃ under vacuum for 12 hours, and finally cool them to room temperature to obtain high-strength and high-toughness aluminum alloy material.

[0047] Example 4:

[0048] In this embodiment, a high-strength and high-toughness aluminum alloy material for new energy vehicles is provided. By mass percentage, the alloy material contains the following constituent raw materials: 1.25% molybdenum, 1.0% nickel, 0.14% manganese, 0.20% tungsten, 0.1% copper, 0.45% iridium, 0.3% toughening agent, and the balance aluminum and other unavoidable impurities, the impurity content of which is not higher than 0.01%.

[0049] A method for preparing a high-strength and high-toughness aluminum alloy material for new energy vehicles, the method comprising the following steps:

[0050] 1) Calcium magnesium tourmaline and ferrosilicon copolymer (formed by polymerization of sodium silicate and ferrate at a molar ratio of 4:1) were mixed in a mass ratio of 1:5. After pulverization, the mixture was calcined at 600℃ for 6 hours, then cooled to room temperature. The resulting product was ground, dried, and passed through a 1000-mesh sieve to obtain a mixed powder. The mixed powder was ultrasonically dispersed in a 45wt% polyglycerol aqueous solution at a mass-volume ratio of 1g:8mL. Sodium periodate (added at a mass-volume ratio of 1g:3mL to polyglycerol) was added under light-protected conditions, and the mixture was stirred to obtain product I. Aqueous butyl rubber latex LE-50 and dioctyl maleate were mixed in a volume ratio of 1:2 to obtain a rubber solution. Product I, titanium dioxide, and the rubber solution were mixed in a mass-volume ratio of 1g:0.02g:3mL and stirred at 50℃ for 9 hours. After stirring, the mixture was allowed to stand for 8 hours. The resulting rubber compound was extruded, dehydrated, and dried to obtain a toughening agent.

[0051] 2) Weigh each raw material according to the proportion, grind each raw material separately, and then pass them through a 1000-mesh sieve to obtain ultrafine raw material powder. Mix all raw material powders except for the toughening agent evenly, and then ball mill at 200 rpm for 20 hours to obtain the first grinding product. Ball mill the obtained first grinding product at 900 rpm for 3 hours to obtain the second grinding product. Mix the obtained second grinding product with the toughening agent powder evenly, and press the resulting mixture into ingots under a pressure of 60T. Hold the resulting ingots at 180℃ under vacuum for 13 hours, and finally cool them to room temperature to obtain high-strength and high-toughness aluminum alloy material.

[0052] Comparative Example 1:

[0053] In this comparative example, a high-strength and high-toughness aluminum alloy material for new energy vehicles is provided. By mass percentage, the alloy material contains the following constituent raw materials: 1.5% molybdenum, 1.0% nickel, 0.245% manganese, 0.2315% tungsten, 0.075% copper, 0.5% iridium, 0.3% toughening agent, and the balance aluminum and other unavoidable impurities, the impurity content of which is not higher than 0.01%.

[0054] A method for preparing a high-strength and high-toughness aluminum alloy material for new energy vehicles, the method comprising the following steps:

[0055] 1) The ferrosilicon copolymer (formed by polymerization of sodium silicate and ferrate at a molar ratio of 4:1) was pulverized and calcined at 700℃ for 5 hours, then cooled to room temperature. The resulting product was ground, dried, and passed through a 900-mesh sieve to obtain powder. The obtained powder was ultrasonically dispersed in a 45wt% polyglycerol aqueous solution at a mass-to-volume ratio of 1g:7.5mL. Sodium periodate (added at a mass-to-volume ratio of 1g:4mL to polyglycerol) was added under light-protected conditions, and the mixture was stirred to obtain product I. Aqueous butyl rubber latex LE-50 and butyl methacrylate were mixed at a volume ratio of 1:1.5 to obtain a glue solution. Product I, titanium dioxide, and the glue solution were mixed at a mass-to-volume ratio of 1g:0.03g:3.5mL and stirred at 50℃ for 10 hours. After stirring, the mixture was allowed to stand for 7 hours. The resulting rubber compound was extruded, dehydrated, and dried to obtain a toughening agent.

[0056] 2) Weigh each raw material according to the proportion, grind each raw material separately, and then pass them through a 1000-mesh sieve to obtain ultrafine raw material powder. Mix all raw material powders except for the toughening agent evenly, and then ball mill at 200 rpm for 15 hours to obtain the first grinding product. Ball mill the first grinding product at 1000 rpm for 3 hours to obtain the second grinding product. Mix the second grinding product with the toughening agent powder evenly, and press the resulting mixture into ingots under a pressure of 60T. Hold the ingots at 170℃ under vacuum for 14 hours, and finally cool them to room temperature to obtain a high-strength and high-toughness aluminum alloy material.

[0057] Comparative Example 2:

[0058] In this comparative example, a high-strength and high-toughness aluminum alloy material for new energy vehicles is provided. By mass percentage, the alloy material contains the following constituent raw materials: 1.5% molybdenum, 1.0% nickel, 0.245% manganese, 0.2315% tungsten, 0.075% copper, 0.5% iridium, 0.3% toughening agent, and the balance aluminum and other unavoidable impurities, the impurity content of which is not higher than 0.01%.

[0059] A method for preparing a high-strength and high-toughness aluminum alloy material for new energy vehicles, the method comprising the following steps:

[0060] 1) Magnesium tourmaline was pulverized and calcined at 700℃ for 5 hours, then cooled to room temperature. The resulting product was ground, dried, and passed through a 900-mesh sieve to obtain powder. The powder was ultrasonically dispersed in a 45wt% polyglycerol aqueous solution at a mass-to-volume ratio of 1g:7.5mL. Sodium periodate (added at a mass-to-volume ratio of 1g:4mL to polyglycerol) was added under light-protected conditions, and the mixture was stirred to obtain product I. Aqueous butyl rubber latex LE-50 and butyl methacrylate were mixed at a volume ratio of 1:1.5 to obtain a rubber solution. Product I, titanium dioxide, and the rubber solution were mixed at a mass-to-volume ratio of 1g:0.03g:3.5mL and stirred at 50℃ for 10 hours. After stirring, the mixture was allowed to stand for 7 hours. The resulting rubber compound was extruded, dehydrated, and dried to obtain a toughening agent.

[0061] 2) Weigh each raw material according to the proportion, grind each raw material separately, and then pass them through a 1000-mesh sieve to obtain ultrafine raw material powder. Mix all raw material powders except for the toughening agent evenly, and then ball mill at 200 rpm for 15 hours to obtain the first grinding product. Ball mill the first grinding product at 1000 rpm for 3 hours to obtain the second grinding product. Mix the second grinding product with the toughening agent powder evenly, and press the resulting mixture into ingots under a pressure of 60T. Hold the ingots at 170℃ under vacuum for 14 hours, and finally cool them to room temperature to obtain a high-strength and high-toughness aluminum alloy material.

[0062] Comparative Example 3:

[0063] In this comparative example, a high-strength and high-toughness aluminum alloy material for new energy vehicles is provided. By mass percentage, the alloy material contains the following constituent raw materials: 1.5% molybdenum, 1.0% nickel, 0.245% manganese, 0.2315% tungsten, 0.075% copper, 0.5% iridium, 0.3% toughening agent, and the balance aluminum and other unavoidable impurities, the impurity content of which is not higher than 0.01%.

[0064] A method for preparing a high-strength and high-toughness aluminum alloy material for new energy vehicles, the method comprising the following steps:

[0065] 1) Magnesium tourmaline and ferrosilicon copolymer (formed by polymerization of sodium silicate and ferrate at a molar ratio of 4:1) were mixed in a mass ratio of 1:4. After pulverization, the mixture was calcined at 700℃ for 5 hours, then cooled to room temperature. The resulting product was ground, dried, and passed through a 900-mesh sieve to obtain a mixed powder. Waterborne butyl rubber latex LE-50 and butyl methacrylate were mixed in a volume ratio of 1:1.5 to obtain a rubber solution. The mixed powder, titanium dioxide, and rubber solution were mixed in a mass-volume ratio of 1g:0.03g:3.5mL and stirred at 50℃ for 10 hours. After stirring, the mixture was allowed to stand for 7 hours. The resulting rubber compound was extruded, dehydrated, and dried to obtain a toughening agent.

[0066] 2) Weigh each raw material according to the proportion, grind each raw material separately, and then pass them through a 1000-mesh sieve to obtain ultrafine raw material powder. Mix all raw material powders except for the toughening agent evenly, and then ball mill at 200 rpm for 15 hours to obtain the first grinding product. Ball mill the first grinding product at 1000 rpm for 3 hours to obtain the second grinding product. Mix the second grinding product with the toughening agent powder evenly, and press the resulting mixture into ingots under a pressure of 60T. Hold the ingots at 170℃ under vacuum for 14 hours, and finally cool them to room temperature to obtain a high-strength and high-toughness aluminum alloy material.

[0067] Comparative Example 4:

[0068] In this comparative example, a high-strength and high-toughness aluminum alloy material for new energy vehicles is provided. By mass percentage, the alloy material contains the following constituent raw materials: 1.5% molybdenum, 1.0% nickel, 0.245% manganese, 0.2315% tungsten, 0.075% copper, 0.5% iridium, 0.3% toughening agent, and the balance aluminum and other unavoidable impurities, the impurity content of which is not higher than 0.01%.

[0069] A method for preparing a high-strength and high-toughness aluminum alloy material for new energy vehicles, the method comprising the following steps:

[0070] 1) Mix water-based butyl rubber latex LE-50 with butyl methacrylate at a volume ratio of 1:1.5 to obtain a rubber solution. Mix titanium dioxide with the rubber solution at a mass-volume ratio of 0.03g:3.5mL. Stir at 50℃ for 10h. After stirring, let stand for 7h. Extrude and dry the resulting rubber compound to obtain a toughening agent.

[0071] 2) Weigh each raw material according to the proportion, grind each raw material separately, and then pass them through a 1000-mesh sieve to obtain ultrafine raw material powder. Mix all raw material powders except for the toughening agent evenly, and then ball mill at 200 rpm for 15 hours to obtain the first grinding product. Ball mill the first grinding product at 1000 rpm for 3 hours to obtain the second grinding product. Mix the second grinding product with the toughening agent powder evenly, and press the resulting mixture into ingots under a pressure of 60T. Hold the ingots at 170℃ under vacuum for 14 hours, and finally cool them to room temperature to obtain a high-strength and high-toughness aluminum alloy material.

[0072] Comparative Example 5:

[0073] In this comparative example, a high-strength and high-toughness aluminum alloy material for new energy vehicles is provided. By mass percentage, the alloy material contains the following constituent raw materials: 1.5% molybdenum, 1.0% nickel, 0.245% manganese, 0.2315% tungsten, 0.075% copper, 0.5% iridium, and the balance aluminum and other unavoidable impurities, the impurity content of which is not higher than 0.01%.

[0074] A method for preparing a high-strength and high-toughness aluminum alloy material for new energy vehicles, the method comprising the following steps:

[0075] 1) Weigh each raw material according to the specified proportions, grind each raw material separately, and then pass them through a 1000-mesh sieve to obtain ultrafine raw material powder. Mix the raw material powders evenly, and then ball mill them at a low speed of 200 rpm for 15 hours to obtain the first grinding product. Ball mill the obtained first grinding product at a high speed of 1000 rpm for 3 hours to obtain the second grinding product. Press the obtained second grinding product into ingots under a pressure of 60T, heat-treat the obtained ingots at 170℃ under vacuum for 14 hours, and finally cool them to room temperature to obtain high-strength and high-toughness aluminum alloy material.

[0076] Comparative Example 6:

[0077] In this comparative example, a high-strength and high-toughness aluminum alloy material for new energy vehicles is provided. By mass percentage, the alloy material contains the following constituent raw materials: nickel 1.0%, manganese 0.245%, tungsten 0.2315%, copper 0.075%, iridium 0.5%, toughening agent 0.3%, and the balance aluminum and other unavoidable impurities, the impurity content of which is not higher than 0.01%.

[0078] A method for preparing a high-strength and high-toughness aluminum alloy material for new energy vehicles, the method comprising the following steps:

[0079] 1) Magnesium tourmaline and ferrosilicon copolymer (formed by polymerization of sodium silicate and ferrate at a molar ratio of 4:1) were mixed in a mass ratio of 1:4. After pulverization, the mixture was calcined at 700℃ for 5 hours, then cooled to room temperature. The resulting product was ground, dried, and passed through a 900-mesh sieve to obtain a mixed powder. The mixed powder was ultrasonically dispersed in a 45wt% polyglycerol aqueous solution at a mass-volume ratio of 1g:7.5mL. Sodium periodate (added at a mass-volume ratio of 1g:4mL to polyglycerol) was added under light-protected conditions, and the mixture was stirred to obtain product I. Aqueous butyl rubber latex LE-50 and butyl methacrylate were mixed at a volume ratio of 1:1.5 to obtain a rubber solution. Product I, titanium dioxide, and the rubber solution were mixed at a mass-volume ratio of 1g:0.03g:3.5mL and stirred at 50℃ for 10 hours. After stirring, the mixture was allowed to stand for 7 hours. The resulting rubber compound was extruded, dehydrated, and dried to obtain a toughening agent.

[0080] 2) Weigh each raw material according to the proportion, grind each raw material separately, and then pass them through a 1000-mesh sieve to obtain ultrafine raw material powder. Mix all raw material powders except for the toughening agent evenly, and then ball mill at 200 rpm for 15 hours to obtain the first grinding product. Ball mill the first grinding product at 1000 rpm for 3 hours to obtain the second grinding product. Mix the second grinding product with the toughening agent powder evenly, and press the resulting mixture into ingots under a pressure of 60T. Hold the ingots at 170℃ under vacuum for 14 hours, and finally cool them to room temperature to obtain a high-strength and high-toughness aluminum alloy material.

[0081] Comparative Example 7:

[0082] In this comparative example, a high-strength and high-toughness aluminum alloy material for new energy vehicles is provided. By mass percentage, the alloy material contains the following constituent raw materials: 1.5% molybdenum, 1.0% nickel, 0.245% manganese, 0.2315% tungsten, 0.075% copper, 0.3% toughening agent, and the balance aluminum and other unavoidable impurities, the impurity content of which is not higher than 0.01%.

[0083] A method for preparing a high-strength and high-toughness aluminum alloy material for new energy vehicles, the method comprising the following steps:

[0084] 1) Magnesium tourmaline and ferrosilicon copolymer (formed by polymerization of sodium silicate and ferrate at a molar ratio of 4:1) were mixed in a mass ratio of 1:4. After pulverization, the mixture was calcined at 700℃ for 5 hours, then cooled to room temperature. The resulting product was ground, dried, and passed through a 900-mesh sieve to obtain a mixed powder. The mixed powder was ultrasonically dispersed in a 45wt% polyglycerol aqueous solution at a mass-volume ratio of 1g:7.5mL. Sodium periodate (added at a mass-volume ratio of 1g:4mL to polyglycerol) was added under light-protected conditions, and the mixture was stirred to obtain product I. Aqueous butyl rubber latex LE-50 and butyl methacrylate were mixed at a volume ratio of 1:1.5 to obtain a rubber solution. Product I, titanium dioxide, and the rubber solution were mixed at a mass-volume ratio of 1g:0.03g:3.5mL and stirred at 50℃ for 10 hours. After stirring, the mixture was allowed to stand for 7 hours. The resulting rubber compound was extruded, dehydrated, and dried to obtain a toughening agent.

[0085] 2) Weigh each raw material according to the proportion, grind each raw material separately, and then pass them through a 1000-mesh sieve to obtain ultrafine raw material powder. Mix all raw material powders except for the toughening agent evenly, and then ball mill at 200 rpm for 15 hours to obtain the first grinding product. Ball mill the first grinding product at 1000 rpm for 3 hours to obtain the second grinding product. Mix the second grinding product with the toughening agent powder evenly, and press the resulting mixture into ingots under a pressure of 60T. Hold the ingots at 170℃ under vacuum for 14 hours, and finally cool them to room temperature to obtain a high-strength and high-toughness aluminum alloy material.

[0086] Comparative Example 8:

[0087] In this comparative example, a high-strength and high-toughness aluminum alloy material for new energy vehicles is provided. By mass percentage, the alloy material contains the following constituent raw materials: 1.5% molybdenum, 1.0% nickel, 0.245% manganese, 0.075% copper, 0.5% iridium, 0.3% toughening agent, and the balance aluminum and other unavoidable impurities, the impurity content of which is not higher than 0.01%.

[0088] A method for preparing a high-strength and high-toughness aluminum alloy material for new energy vehicles, the method comprising the following steps:

[0089] 1) Magnesium tourmaline and ferrosilicon copolymer (formed by polymerization of sodium silicate and ferrate at a molar ratio of 4:1) were mixed in a mass ratio of 1:4. After pulverization, the mixture was calcined at 700℃ for 5 hours, then cooled to room temperature. The resulting product was ground, dried, and passed through a 900-mesh sieve to obtain a mixed powder. The mixed powder was ultrasonically dispersed in a 45wt% polyglycerol aqueous solution at a mass-volume ratio of 1g:7.5mL. Sodium periodate (added at a mass-volume ratio of 1g:4mL to polyglycerol) was added under light-protected conditions, and the mixture was stirred to obtain product I. Aqueous butyl rubber latex LE-50 and butyl methacrylate were mixed at a volume ratio of 1:1.5 to obtain a rubber solution. Product I, titanium dioxide, and the rubber solution were mixed at a mass-volume ratio of 1g:0.03g:3.5mL and stirred at 50℃ for 10 hours. After stirring, the mixture was allowed to stand for 7 hours. The resulting rubber compound was extruded, dehydrated, and dried to obtain a toughening agent.

[0090] 2) Weigh each raw material according to the proportion, grind each raw material separately, and then pass them through a 1000-mesh sieve to obtain ultrafine raw material powder. Mix all raw material powders except for the toughening agent evenly, and then ball mill at 200 rpm for 15 hours to obtain the first grinding product. Ball mill the first grinding product at 1000 rpm for 3 hours to obtain the second grinding product. Mix the second grinding product with the toughening agent powder evenly, and press the resulting mixture into ingots under a pressure of 60T. Hold the ingots at 170℃ under vacuum for 14 hours, and finally cool them to room temperature to obtain a high-strength and high-toughness aluminum alloy material.

[0091] Experimental Example: Basic Performance Testing of Different Aluminum Alloy Ingots

[0092] Experimental subjects: Aluminum alloy ingots obtained in Examples 1-4 and Comparative Examples 1-8;

[0093] Experimental methods: The yield strength, tensile strength and elongation were tested in accordance with GB / T 222-2002 Metallic Materials - Tensile Testing at Room Temperature. The above tests were conducted at room temperature and 200℃, respectively.

[0094] Experimental results: see Table 1 and Table 2.

[0095] Table 1. Statistics on yield strength, tensile strength and elongation of different alloy ingots at room temperature.

[0096] serial number Tensile strength / MPa Yield strength / MPa Elongation / % Example 1 558.5 489.7 14.8 Example 2 543.1 472.4 14.2 Example 3 576.6 502.3 16.5 Example 4 564.8 492.6 15.3 Comparative Example 1 507.4 446.9 12.7 Comparative Example 2 529.8 462.4 13.4 Comparative Example 3 515.7 438.9 11.7 Comparative Example 4 422.5 351.2 8.8 Comparative Example 5 411.2 346.8 8.5 Comparative Example 6 205.6 127.3 6.4 Comparative Example 7 288.9 217.5 7.0 Comparative Example 8 377.5 318.6 8.1

[0097] Table 2. Statistics of yield strength, tensile strength and elongation of different alloy ingots at 200℃

[0098] serial number Tensile strength / MPa Yield strength / MPa Elongation / % Example 1 466.4 387.2 35.3 Example 2 449.7 366.5 34.6 Example 3 482.5 393.6 35.9 Example 4 469.3 380.1 35.4 Comparative Example 1 417.2 323.4 33.9 Comparative Example 2 432.9 345.6 34.2 Comparative Example 3 441.7 350.4 34.4 Comparative Example 4 382.6 297.5 32.8 Comparative Example 5 377.7 269.6 32.1 Comparative Example 6 154.5 94.3 28.5 Comparative Example 7 219.7 149.8 30.3 Comparative Example 8 328.5 247.3 31.4

[0099] As can be seen from the results in Tables 1 and 2, the tensile strength, yield strength, and elongation of the aluminum alloy ingots in Examples 1-4 of this invention are significantly higher than those of the aluminum alloy ingots in Comparative Examples 1-8, both at room temperature and at 200°C. Among them, the tensile strength, yield strength, and elongation of the aluminum alloy ingot in Comparative Example 5, which lacks toughening agent, are significantly lower than those of the aluminum alloy ingot in Example 1, indicating that toughening agent can improve the tensile strength, yield strength, and elongation of the alloy. Comparative Examples 6-8 are aluminum alloy ingots without molybdenum, ethylamine, and tungsten, respectively. The data from Examples 1 and Comparative Examples 6-8 show that molybdenum, ethylamine, and tungsten all have significant effects on the tensile strength, yield strength, and elongation of the aluminum alloy ingots, with molybdenum having the most significant effect.

[0100] Experimental Example 2: Corrosion Resistance Testing of Different Alloys

[0101] The corrosion resistance of the alloy ingots from Example 1 and Comparative Examples 1-8 was tested according to GB / T7998-2005. The test results are shown in Table 3.

[0102] Table 3. Statistical analysis of corrosion resistance of different alloys

[0103] serial number Corrosion level Corrosion depth (mm) Example 1 1 0.0075 Comparative Example 1 1 0.0098 Comparative Example 2 2 0.0203 Comparative Example 3 2 0.0124 Comparative Example 4 3 0.0452 Comparative Example 5 3 0.0953 Comparative Example 6 3 0.0653 Comparative Example 7 2 0.0296 Comparative Example 8 2 0.0244

[0104] As can be seen from the results in Table 3, the alloy material obtained in Example 1 of the present invention has better corrosion resistance compared with Comparative Examples 1 to 8.

[0105] The above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention in any way. Although the present invention has been disclosed above with reference to preferred embodiments, it is not intended to limit the present invention. Any person skilled in the art can make some modifications or alterations to the methods and techniques disclosed above without departing from the scope of the present invention to create equivalent embodiments. Any simple modifications, equivalent changes and alterations made to the above embodiments based on the technical essence of the present invention without departing from the scope of the present invention shall still fall within the scope of the present invention.

Claims

1. A high-strength and high-toughness aluminum alloy material for new energy vehicles, characterized in that, The alloy material comprises, by weight percentage, the following constituent raw materials: 1.25–1.75% molybdenum, 0.55–1.45% nickel, 0.14–0.35% manganese, 0.185–0.278% tungsten, 0.05–0.1% copper, 0.35–0.65% iridium, 0.1–0.5% toughening agent, and the balance being aluminum and other unavoidable impurities, the impurity content of which is not higher than 0.01%.

2. The high-strength and high-toughness aluminum alloy material for new energy vehicles according to claim 1, characterized in that, The method for preparing the toughening agent includes: Tourmaline and ferrosilicon copolymer were mixed in a mass ratio of 1:3 to 5, pulverized, and calcined at 600 to 800°C for 4 to 6 hours. After cooling to room temperature, the resulting product was ground, dried, and passed through an 800 to 1000 mesh sieve to obtain a mixed powder. The obtained mixed powder was ultrasonically dispersed in a 40-50 wt% polyglycerol aqueous solution, and sodium periodate was added under light-protected conditions and stirred to obtain product I. Butyl rubber and carboxylic acid ester are mixed at a volume ratio of 1:1 to 2 to obtain a rubber solution. Product I, titanium dioxide and the rubber solution are mixed at a mass-volume ratio of 1g:0.01 to 0.05g:2 to 5mL. The mixture is stirred at 40 to 60°C for 8 to 12 hours. After stirring, the mixture is allowed to stand for 6 to 8 hours. The resulting rubber compound is then extruded, dehydrated and dried to obtain a toughening agent.

3. The high-strength and high-toughness aluminum alloy material for new energy vehicles according to claim 2, characterized in that, The tourmaline is selected from any one of magnesium tourmaline, iron tourmaline, iron-magnesium tourmaline, and calcium-magnesium tourmaline.

4. The high-strength and high-toughness aluminum alloy material for new energy vehicles according to claim 2, characterized in that, The ferrosilicon copolymer is formed by polymerizing sodium silicate and ferrate in a molar ratio of 3 to 5:

1.

5. The high-strength and high-toughness aluminum alloy material for new energy vehicles according to claim 2, characterized in that, The sodium periodate was added at a mass-to-volume ratio of 1g to 3-5mL with polyglycerol.

6. The high-strength and high-toughness aluminum alloy material for new energy vehicles according to claim 2, characterized in that, The butyl rubber is an aqueous butyl rubber latex LE-50.

7. The high-strength and high-toughness aluminum alloy material for new energy vehicles according to claim 2, characterized in that, The carboxylic ester is selected from any one of butyl methacrylate, dibutyl maleate, isooctyl acrylate, and dioctyl maleate.

8. A method for preparing a high-strength and high-toughness aluminum alloy material for new energy vehicles according to any one of claims 1 to 7, characterized in that, The method includes the following steps: 1) Weigh each raw material according to the proportion, grind each raw material separately, and then pass them through a 1000-mesh sieve to obtain ultrafine raw material powder; 2) Mix all raw material powders except for the toughening agent evenly, and then ball mill at low speed to obtain the first grinding product; 3) The obtained first grinding product is subjected to high-speed ball milling to obtain the second grinding product; 4) The obtained second grinding product is mixed evenly with toughening agent powder, and then pressed, kept warm and cooled in sequence to obtain high strength and toughness aluminum alloy material.

9. The preparation method according to claim 8, characterized in that, The low-speed ball milling conditions described in step 2) are: rotation speed 100-300 rpm, time 10-20 h; The high-speed ball milling conditions described in step 3) are: rotation speed 800-1200 rpm, time 2-4 h.

10. The application of an aluminum alloy material according to any one of claims 1 to 7 or an aluminum alloy material prepared by the preparation method according to claim 8 or 9 in the field of new energy vehicles.