A high-age hardening response corrosion-resistant magnesium alloy and a preparation method thereof

Abstract

The application belongs to the field of metal material processing, and provides a high-age hardening response corrosion-resistant magnesium alloy and a preparation method thereof.The magnesium alloy comprises, in percentage by mass, Al: 0.5-3.0%, Y: 0.1-1.5%, Ca: 0.05-0.8%, an additive element: 0-0.8%, inevitable impurities: ≤0.05%, and the balance of Mg; the additive element is one or any combination of Ce, Sm and In; and the preparation method comprises alloy smelting, pouring or casting rolling, homogenization heat treatment, multi-pass rolling, solid solution heat treatment and artificial aging.The application can control the solute atom segregation behavior in the magnesium alloy, control the second phase and its metastable state composition, size, quantity and distribution, reduce the micro-electrode corrosion, improve the film passivation ability, significantly improve the corrosion resistance, and improve the age hardening response so that the alloy has good mechanical properties.

Description

Technical Field

[0001] This invention belongs to the field of metal material processing, specifically relating to a high age-hardening response corrosion-resistant magnesium alloy and its preparation method. Background Technology

[0002] Magnesium alloys, as the lightest metallic structural materials currently available, possess characteristics such as low density, high specific strength and specific stiffness, and good shielding and seismic resistance, making them the preferred material for lightweighting in the automotive, rail transportation, aerospace, and electronic communications industries. Mg-Al-Ca alloys, within the magnesium alloy system, have attracted widespread attention due to their excellent room-temperature forming capability and cost advantages, showing promising commercial prospects. However, magnesium alloys suffer from poor corrosion resistance due to their relatively negative equilibrium potential and a surface oxide film P / B ratio (Pilling-Bedworth ratio) of 0.81, making it difficult to ensure the long-term service safety of magnesium alloy components. Furthermore, previous studies have attempted to improve the mechanical properties of magnesium alloys by introducing various alloying elements into the matrix to promote the precipitation of precipitates during aging, thereby increasing the strength of the magnesium alloy. However, uncontrolled precipitation of the second phase often results in a large potential difference with the matrix, easily inducing severe microgalvanic corrosion and preventing the formation of a continuous and stable protective film on the surface, leading to a sharp deterioration in corrosion resistance. This demonstrates that traditional alloy systems and processes cannot simultaneously improve age-hardening response and corrosion resistance. This is a key reason for the mismatch between corrosion resistance and strength in magnesium alloys, further increasing the risk of premature failure in magnesium alloy components. Therefore, how to reduce alloy costs, simplify processes, and simultaneously improve the high age-hardening response strength and corrosion resistance of magnesium alloys is a pressing technical challenge that needs to be addressed. Summary of the Invention

[0003] To address the aforementioned technical challenges, this invention provides a high-age-hardening-response corrosion-resistant magnesium alloy, comprising the following components by mass percentage: Al: 0.5-3.0%, Y: 0.1-1.5%, Ca: 0.05-0.8%, additives: 0-0.8%; unavoidable impurities ≤0.05%, balance being Mg; the additives are one or any combination of Ce, Sm, and In; its preparation method includes the following steps:

[0004] (1) Alloy raw materials are prepared according to the mass percentage, and pure Mg, pure Al, Mg-Y, Mg-Ca or additive element master alloy are added in sequence under argon protection. The mixture is heated and melted at 670-730℃ and stirred thoroughly. After complete melting, the mixture is stirred thoroughly, refined, degassed and slag removed to obtain alloy melt. The additive element master alloy is one or any combination of Mg-Ce master alloy, Mg-Sm master alloy or Mg-In master alloy.

[0005] (2) The alloy melt obtained in step (1) is cast by hand or by twin-roll casting to obtain a cast or cast-rolled magnesium alloy billet. The twin-roll casting speed is 5-7 m / min and the roll gap is 2-6 mm.

[0006] (3) The cast or cast-rolled magnesium alloy billet obtained in step (2) is subjected to homogenization heat treatment. The homogenization heat treatment is as follows: holding at 300-400℃ for 0.5-4h, air-cooling or water-cooling to room temperature, and then performing multiple rolling processes to obtain rolled billet; then performing solution heat treatment under argon protection, and then water quenching; and then performing artificial aging heat treatment to obtain high age-hardening response corrosion-resistant magnesium alloy.

[0007] The multi-pass rolling process in step (3) is as follows: the rolling passes are 3-10, the total reduction is 70-85%, and the temperature is 300-350℃ for 5-15 minutes before each rolling pass, and the rolling temperature is 280-320℃; the solution heat treatment is as follows: the temperature is 350-450℃ for 5-30 minutes; the artificial aging treatment is as follows: the temperature is 150-250℃ for 5-120 minutes.

[0008] Further, by mass percentage, the Al: 0.6-2.0%, Y: 0.3-1.3%, and Ca: 0.15-0.4%.

[0009] Further, the added element, by mass percentage, is 0.1-0.4%.

[0010] Compared with the prior art, the present invention has the following characteristics:

[0011] Compared with existing technologies, this invention breaks through the technical bottleneck of increasing production costs by increasing alloy addition or rare earth content to improve corrosion resistance or age-hardening strength. It also effectively solves the technical bottleneck of simultaneously improving corrosion resistance and age-hardening strength of alloys. Through the interaction between components, the proportions, and the synergistic control of processes and process parameters, it simultaneously achieves higher corrosion resistance and improved strength in aging response than existing alloys. Specifically, the average hydrogen evolution amount of the alloy after immersion in 3.5 wt.% NaCl solution for 3 days is ≤0.6 mL / cm³. 2 / day, compared with the alloy after solution heat treatment, the yield strength of the aged alloy increased by ≥31.3%. Detailed analysis is as follows:

[0012] Current technology for designing corrosion-resistant magnesium alloys involves adding large amounts of rare earth elements or trace amounts of alloying elements to ensure melt purity. However, introducing large amounts of rare earth elements drastically increases alloy preparation costs, while adding trace amounts of alloying elements results in the alloy's mechanical properties failing to meet application requirements due to a lack of effective strengthening mechanisms. This invention simplifies the process by reducing the content of alloys and rare earth elements. Firstly, it introduces defect locations through the interaction and deformation between alloy components, promoting the dispersed distribution of precipitated phases within the alloy. Simultaneously, it forms nanoscale solute atom segregation microstructures at defect locations and interfaces, effectively inhibiting grain growth and obtaining a uniform, fine-grained structure. This structure, along with the nanoscale solute atom segregation and thermally stable phases, forms a multi-level structure. Furthermore, the solute atom segregation microstructure has a smaller potential difference with the matrix compared to the stable second phase, and it increases the content of easily passivated elements in the matrix, inhibiting localized corrosion while directly participating in the formation of a surface passivation film. Secondly, it effectively reduces the obstruction of impurities to improving corrosion resistance. Simultaneously, it forms a weak cathode phase to replace the high-potential coarse eutectic phase, balancing the potential difference between the matrix and second phases while ensuring mechanical properties. In addition, the use of elements such as Al, Y, Ca, and Ce to dissolve and generate corresponding oxide / hydroxide films can change the magnesium content in existing technologies. The loose and porous film structure on the alloy surface promotes passivation of the alloy surface film by regulating the distribution of alloy components, the size and distribution of precipitated phases, and solute segregation. Thirdly, by regulating the aging precipitation behavior of alloy solute atoms and grain orientation and size, the growth behavior and structure of the surface film can be controlled. In addition, the generated high-temperature stable phase can better pin grain boundaries, hinder grain boundary migration to maintain fine grain structure, prevent high-temperature softening of the alloy, and reduce microgalvanic corrosion by the small potential difference between the high-temperature stable phase and the magnesium alloy matrix, which can significantly reduce the probability of pitting corrosion compared to existing commercial AM-based magnesium alloys, thus reducing the risk of local failure of magnesium alloy components. At the same time, only a weak texture is formed inside the magnesium alloy during deformation, which strengthens basal slip while activating non-basal slip and cross-slip, resulting in excellent formability. Therefore, the deformation process is shortened, efficient production is achieved, rolling and annealing temperatures are reduced, and the corrosion resistance and aging response strength of the alloy are improved simultaneously.

[0013] The alloy provided by this invention enhances the age-hardening response by controlling the alloying element ratio and their distribution in the alloy, thereby altering the magnesium alloy film structure and obtaining a low-alloy magnesium alloy that combines corrosion resistance and mechanical properties. The yield strength of the optimized age-hardened alloy is increased by ≥31.3% due to the age-hardening response compared to the solution-treated T6 alloy, and the average hydrogen evolution after immersion in 3.5 wt.% NaCl solution for 3 days is ≤0.6 mL / cm³. 2 / day. Detailed Implementation

[0014] The present invention will be further described below with reference to embodiments and comparative examples. It should be understood that the embodiments described below are intended to facilitate the understanding of the present invention and should not be used to limit the scope of protection of the present invention.

[0015] Example 1

[0016] Taking the Mg-0.8Al-0.5Y-0.3Ca alloy as an example, it comprises the following components by mass percentage: Al: 0.8%, Y: 0.5%, Ca: 0.3%, total unavoidable impurities ≤ 0.05%, and the balance being Mg. Its preparation method is as follows:

[0017] (1) Alloy raw materials are prepared according to the mass percentage, and pure Mg, pure Al, Mg-Y and Mg-Ca intermediate alloy are added in sequence under argon protection. The mixture is heated and melted at 710°C and stirred thoroughly. Then it is refined, degassed and slag removed to obtain alloy melt.

[0018] (2) The alloy melt obtained in step (1) is poured into a copper mold by manual casting to obtain a cast billet;

[0019] (3) The cast billet obtained in step (2) is subjected to homogenization heat treatment, held at 350℃ for 0.5h, then air-cooled to room temperature, and then subjected to multi-pass rolling treatment. The rolling treatment is as follows: 6 passes of rolling, with a total reduction of 81%. Before each pass of rolling, it is held at 300℃ for 10min, and the rolling temperature is 280℃. Then, solution heat treatment is performed under argon protection, held at 350℃ for 15min, and then water-quenched. Then, artificial aging heat treatment is performed. The aging treatment is as follows: temperature is 175℃, time is 120min, to obtain a high-age-hardening-response corrosion-resistant Mg-0.8Al-0.5Y-0.3Ca magnesium alloy.

[0020] The corrosion resistance of the Mg-0.8Al-0.5Y-0.3Ca magnesium alloy obtained in step (3) of this embodiment is as follows: the average hydrogen evolution amount after the alloy is immersed in 3.5wt.% NaCl solution for 3 days is 0.6mL / cm³. 2 / day; while under the same treatment conditions, the average hydrogen evolution rate of pure magnesium of the same size is as high as 5 mL / cm. 2 / day; At the same time, the alloy's age-hardening response strength is significantly improved, with the yield strength of the aged alloy increasing by 31.3% compared to the alloy after solution heat treatment.

[0021] Example 2

[0022] Taking the Mg-0.6Al-0.3Y-0.15Ca-0.1Ce-0.1Sm alloy as an example, it comprises the following components by mass percentage: Al: 0.6%, Y: 0.3%, Ca: 0.15%, Ce: 0.1%, Sm: 0.1%, total unavoidable impurities ≤ 0.05%, and the balance being Mg. Its preparation method is as follows:

[0023] (1) Alloy raw materials are prepared according to the mass percentage, and pure Mg, pure Al, Mg-Y and Mg-Ca master alloy are added in sequence under argon protection and heated to melt at 700°C; then Mg-Ce and Mg-Sm master alloy are added in sequence at 670°C. After complete melting, the mixture is stirred thoroughly, refined, degassed and slag removed to obtain alloy melt.

[0024] (2) The alloy melt obtained in step (1) is poured into a copper mold by manual casting to obtain a cast billet;

[0025] (3) The cast billet obtained in step (2) is subjected to homogenization heat treatment, held at 375℃ for 1 hour, then air-cooled to room temperature, and then subjected to multi-pass rolling treatment. The rolling treatment is as follows: 7 passes of rolling, with a total reduction of 83%. Before each pass of rolling, the billet is held at 325℃ for 8 minutes, and the rolling temperature is 300℃. Then, solution heat treatment is performed under argon protection, held at 400℃ for 8 minutes, and then water-quenched. Then, artificial aging heat treatment is performed. The aging treatment is as follows: held at 195℃ for 80 minutes to obtain a high-age-hardening-response corrosion-resistant Mg-0.6Al-0.3Y-0.15Ca-0.1Ce-0.1Sm magnesium alloy.

[0026] The corrosion resistance of the Mg-0.6Al-0.3Y-0.15Ca-0.1Ce-0.1Sm magnesium alloy obtained in step (3) of this embodiment is as follows: the average hydrogen evolution amount of the alloy after immersion in 3.5wt.% NaCl solution for 3 days is 0.47mL / cm³. 2 / day, while under the same treatment conditions, the average hydrogen evolution rate of pure magnesium of the same size is as high as 5mL / cm. 2 / day; At the same time, the alloy's age-hardening response strength is significantly improved, with the yield strength of the aged alloy increasing by 34.2% compared to the alloy after solution heat treatment.

[0027] Example 3

[0028] Taking the Mg-2.0Al-1.0Y-0.3In-0.3Ca alloy as an example, it comprises the following components by mass percentage: Al: 2%, Y: 1%, In: 0.3%, Ca: 0.3%, total unavoidable impurities ≤ 0.05%, and the balance being Mg. Its preparation method is as follows:

[0029] (1) Alloy raw materials are prepared according to the mass percentage, and pure Mg, pure Al, Mg-Y, Mg-In and Mg-Ca master alloy are added in sequence under argon protection. The mixture is heated and melted at 715°C. After melting, the mixture is stirred thoroughly, refined, degassed and slag removed to obtain alloy melt.

[0030] (2) The alloy melt obtained in step (1) is subjected to twin-roll casting and rolling to obtain a cast-rolled billet: the twin-roll casting and rolling process is as follows: casting and rolling speed 7m / min, roll gap 2.5mm;

[0031] (3) The cast-rolled billet obtained in step (2) is subjected to homogenization heat treatment, held at 400℃ for 2.5h, then air-cooled to room temperature, and then subjected to multi-pass rolling treatment. The rolling treatment is as follows: 8 passes of rolling, with a total reduction of 76%. Before each pass of rolling, the billet is held at 350℃ for 8min, and the rolling temperature is 320℃. Then, the billet is subjected to solution heat treatment in argon gas, held at 450℃ for 15min, and then immediately subjected to water quenching. Then, the billet is subjected to artificial aging heat treatment. The aging treatment is as follows: held at 250℃ for 45min to obtain a high-age-hardening-response corrosion-resistant Mg-2.0Al-1.0Y-0.3In-0.3Ca magnesium alloy.

[0032] The corrosion resistance of the Mg-2.0Al-1.0Y-0.3In-0.3Ca magnesium alloy obtained in step (3) of this embodiment is as follows: the average hydrogen evolution amount after the alloy is immersed in 3.5wt.% NaCl solution for 3 days is 0.53mL / cm³. 2 / day, while under the same treatment conditions, the average hydrogen evolution rate of pure magnesium of the same size is as high as 5mL / cm. 2 / day; Meanwhile, the alloy exhibits a high age-hardening response strength, with the yield strength of the aged alloy increasing by 33.8% compared to the alloy after solution heat treatment.

[0033] Example 4

[0034] Taking the Mg-1.6Al-1.3Y-0.4Ca-0.2In-0.1Ce alloy as an example, it comprises the following components by mass percentage: Al: 1.6%, Y: 1.3%, Ca: 0.4%, In: 0.2%, Ce: 0.1%, with total unavoidable impurities ≤ 0.05%, and the balance being Mg. Its preparation method is as follows:

[0035] (1) Alloy raw materials are prepared according to the mass percentages. Under argon protection, pure Mg, pure Al, Mg-Y, Mg-Ca and Mg-In master alloys are added in sequence and heated to melt at 730°C. Then, Mg-Ce master alloys are added at 680°C. After complete melting, the mixture is stirred thoroughly, refined, degassed and slag removed to obtain alloy melt.

[0036] (2) The alloy melt obtained in step (1) is subjected to twin-roll casting to obtain a cast-rolled billet; the casting speed is 5.5 m / min and the roll gap is 3 mm.

[0037] (3) The cast-rolled billet obtained in step (2) is subjected to homogenization heat treatment, held at 375℃ for 4 hours, then air-cooled to room temperature, and then subjected to multi-pass rolling treatment. The rolling treatment is as follows: 8 passes of rolling, with a total reduction of 73%. Before each pass of rolling, the billet is held at 325℃ for 10 minutes, and the rolling temperature is 310℃. Then, the billet is subjected to solution heat treatment in argon gas, held at 350℃ for 30 minutes, and then immediately subjected to water quenching. Then, the billet is subjected to artificial aging heat treatment. The aging treatment is as follows: the temperature is 235℃ and the time is 90 minutes to obtain a high-age-hardening-response corrosion-resistant Mg-1.6Al-1.3Y-0.4Ca-0.2In-0.1Ce magnesium alloy.

[0038] The corrosion resistance of the Mg-1.6Al-1.3Y-0.4Ca-0.2In-0.1Ce magnesium alloy obtained in step (3) of this embodiment is as follows: the average hydrogen evolution amount after immersion in 3.5wt.% NaCl solution for 3 days is 0.5mL / cm³. 2 / day, while under the same treatment conditions, the average hydrogen evolution rate of commercial AZ31 magnesium alloy of the same dimensions is as high as 6.67 mL / cm³. 2 / day; Meanwhile, the alloy exhibits a high age-hardening response strength, with the yield strength of the aged alloy increasing by 35.6% compared to the alloy after solution heat treatment.

[0039] Example 5

[0040] Taking the Mg-1.0Al-0.6Y-0.2Ca-0.2Sm-0.1Ce-0.1In alloy as an example, it comprises the following components by mass percentage: Al: 1.03%, Y: 0.63%, Ca: 0.19%, Sm: 0.18%, Ce: 0.11%, In: 0.09%, with total unavoidable impurities ≤ 0.05%, and the balance being Mg. Its preparation method is as follows:

[0041] (1) Alloy raw materials are prepared according to the mass percentage, and pure Mg, pure Al, Mg-Y, Mg-Ca and Mg-In master alloy are added in sequence under argon protection and heated to melt at 710°C; then Mg-Sm and Mg-Ce master alloy are added in sequence at 690°C. After complete melting, the mixture is stirred thoroughly, refined, degassed and slag removed to obtain alloy melt.

[0042] (2) The alloy melt obtained in step (1) is poured into a copper mold by manual casting to obtain a cast billet;

[0043] (3) The cast billet obtained in step (2) is subjected to homogenization heat treatment, held at 300℃ for 2.5h, then water-cooled to room temperature, and then subjected to multi-pass rolling treatment. The rolling treatment is: 6 passes of rolling, with a total reduction of 81%. Before each pass of rolling, annealing treatment is performed at 325℃ for 15min. The rolling temperature is 305℃. Then, solution heat treatment is performed in argon gas, i.e., held at 450℃ for 10min, followed by immediate water quenching. Then, artificial aging heat treatment is performed. The aging treatment is: temperature of 215℃ and time of 85min to obtain a high-age-hardening-response corrosion-resistant Mg-1.0Al-0.6Y-0.2Ca-0.2Sm-0.1Ce-0.1In magnesium alloy.

[0044] The corrosion resistance of the Mg-1.0Al-0.6Y-0.2Ca-0.2Sm-0.1Ce-0.1In magnesium alloy obtained in step (3) of this embodiment is as follows: the average hydrogen evolution amount of the alloy after immersion in 3.5wt.% NaCl solution for 3 days is 0.43mL / cm³. 2 / day, while under the same treatment conditions, the average hydrogen evolution rate of commercial AM50 magnesium alloy of the same dimensions is as high as 9.33 mL / cm². 2 / day; Meanwhile, the alloy exhibits a high age-hardening response strength, with the yield strength of the aged alloy increasing by 37.5% compared to the alloy after solution heat treatment.

[0045] Comparative Example 1

[0046] The 2022 Master's thesis of Gao Jiarong from Chongqing University: Study on the Influence of Composition and Heat Treatment on the Mechanical Properties of Mg-Al-Ce Heat-Resistant Magnesium Alloys.

[0047] Comparative Example 1 discloses a Mg-8Al-4Ce-0.2Zn-0.2Mn alloy obtained through melting-casting-solution-aging treatment. The optimized solution heat treatment process involves holding at 370℃ for 24 hours, followed by aging at 160℃ for 12 hours. Compared to the solution-treated alloy, the yield strength of this alloy increased by 13% after aging treatment.

[0048] Compared with the present invention, the total alloy addition and rare earth addition of Comparative Example 1 are higher than those of the present invention, and the processes used are also significantly different. In particular, the minimum increase in yield strength after aging in the present invention is 31.3% (see the magnesium alloy Mg-0.8Al-0.5Y-0.3Ca in Example 1). Therefore, compared with Comparative Example 1, the magnesium alloy obtained in Example 1 of the present invention has a stronger aging response capability when the alloy addition and rare earth content of Example 1 of the present invention are lower than those of the alloy disclosed in Comparative Example 1. In addition, Comparative Example 1 does not provide a technical solution on how to improve the corrosion resistance of magnesium alloy.

[0049] Comparative Example 2

[0050] Li et al. published a journal article in Journal of Materials Science & Technology 163(2023)110605: A corrosion-resistant and age-hardenable Mg-Al-Mn-Ca-Ce dilute alloy with fine-grained structure processed by controlled rolling.

[0051] This comparative example discloses a Mg-0.6Al-0.5Mn-0.2Ca-0.3Ce alloy obtained through melting, casting, multi-stage homogenization annealing, hot extrusion, double-stage homogenization annealing, rolling, solution treatment, and artificial aging. The average hydrogen evolution rate of this alloy after immersion in a 3.5 wt.% NaCl solution for 3 days is approximately 1.0 mL / cm³. 2 / day, compared with the solid solution alloy, the yield strength of this alloy after aging treatment is increased by 21.1%.

[0052] The total alloy addition in this comparative example was 1.6%, compared to Example 2 (1.25%), which had the lowest alloy addition of the present invention. The total alloy addition in Comparative Example 2 was higher than that in Example 2 of the present invention, and the processes used were also significantly different (the present invention did not employ the multi-stage homogenization and hot extrusion treatment disclosed in Comparative Example 2; the process was simplified compared to Comparative Example 2). The average hydrogen evolution rate of the alloy in Example 2 after aging and immersion in a 3.5 wt.% NaCl solution for 3 days was 0.47 mL / cm³. 2 / day, lower than the average hydrogen evolution rate of the alloy disclosed in Comparative Example 2 under the same conditions (1.0 mL / cm²). 2 Therefore, compared with Comparative Example 2, the alloy obtained in Example 2 of the present invention has stronger corrosion resistance; compared with the solid solution alloy, the yield strength of the alloy in Example 2 of the present invention after aging treatment is increased by 34.2%, which is much higher than the increase rate disclosed in Comparative Example 2 (21.1%).

[0053] In summary, as can be seen from all embodiments of the present invention, the alloy composition, proportions, processes, and process parameters differ in each embodiment. The alloy obtained in Embodiment 5 exhibits the highest corrosion resistance and improved strength in aging response among all embodiments, but the amount of alloying elements and rare earth content in Embodiment 5 is not the highest among all embodiments. Furthermore, compared with the prior art, the present invention achieves higher corrosion resistance and improved strength in aging response than the alloys of the prior art by reducing the amount of alloying elements or rare earth elements and simplifying the process. Therefore, compared with the prior art, the present invention simultaneously improves the corrosion resistance and improved strength in aging response of the alloy. Moreover, the optimal simultaneous improvement effect obtained by the present invention is not determined by a certain alloy composition or a certain process, but is achieved through the interaction between components, proportions, processes, and synergistic control of process parameters.

Claims

1. A high age hardening response corrosion resistant magnesium alloy characterized in that, The magnesium alloy comprises the following components in percentage by mass: Al: 0.5-3.0%, Y: 0.1-1.5%, Ca: 0.05-0.4%, additive element: 0.1-0.8%, inevitable impurity: ≤0.05%, and the balance of Mg; the additive element is one or any combination of Ce, Sm and In; and the preparation method comprises the following steps: (1) configuring alloy raw materials according to the mass percentage, adding pure Mg, pure Al, Mg-Y, Mg-Ca or additive element intermediate alloy in sequence under the protection of argon, heating and melting at 670-730℃ and fully stirring, fully stirring after complete melting, refining, degassing and slag removal to obtain alloy melt, and the additive element intermediate alloy is one or any combination of Mg-Ce intermediate alloy, Mg-Sm intermediate alloy or Mg-In intermediate alloy; (2) pouring the alloy melt obtained in step (1) into a copper mold or double-roller casting by hand casting to obtain as-cast or cast-rolled magnesium alloy blank, and the double-roller casting speed is 5-7 m / min and the roller gap is 2-6 mm; (3) the as-cast or as-cast-rolled magnesium alloy blank obtained in step (2) is subjected to homogenization heat treatment, the homogenization heat treatment being: holding at 300-400℃ for 0.5-4 h, air cooling or water cooling to room temperature, then subjected to multi-pass rolling treatment to obtain a rolled blank; then subjected to solid solution heat treatment under argon protection, and then water quenching cooling; then subjected to artificial aging heat treatment to obtain a high-aging hardening response corrosion-resistant magnesium alloy; the average hydrogen evolution amount of the high-aging hardening response corrosion-resistant magnesium alloy after being immersed in a 3.5wt.% NaCl solution for 3 days is ≤0.6 mL / cm 2 / day, and compared with the alloy after the solid solution heat treatment, the yield strength of the alloy after aging is increased by ≥31.3%. (3) the multi-pass rolling treatment is: the rolling pass is 3-10 passes, the total reduction is 70-85%, and the rolling temperature is 280-320℃; the solid solution heat treatment is: 350-450℃ for 5-30 min; and the artificial aging treatment is: 150-250℃ for 5-120 min.

2. The high strain hardening response corrosion resistant magnesium alloy of claim 1, wherein: The Al is 0.6-2.0% by mass percentage, the Y is 0.3-1.3% by mass percentage, and the Ca is 0.15-0.4% by mass percentage.

3. The high-age hardening response corrosion resistant magnesium alloy according to claim 1 or 2, characterized in that: The additive element is 0.1-0.4% by mass percentage.