H65 brass alloy doped with rare earth element yttrium as well as preparation method and application of H65 brass alloy

Abstract

The invention discloses an H65 brass alloy doped with rare earth element yttrium and a preparation method and application thereof, and belongs to the technical field of alloy materials, and the H65 brass alloy doped with rare earth element yttrium comprises the following components in percentage by mass: 65% of copper element, 0.05-0.35% of rare earth element yttrium and the balance of zinc. Based on thermodynamic calculation, the range of the yttrium adding amount is obtained through phase change, and H65 brass and rare earth element yttrium are smelted in a vacuum induction smelting furnace. According to the H65 brass alloy doped with the rare earth element yttrium and the preparation method and application of the H65 brass alloy doped with the rare earth element yttrium, 0.5-0.35 wt% of the rare earth element yttrium is added into H65 brass in the smelting stage, impurities in the H65 brass are purified through the rare earth element yttrium, crystal grains are refined, the composition of the alpha / beta'phase is adjusted, the dezincification reaction is inhibited, and the quality of the H65 brass is improved. And the tensile strength, microhardness and corrosion resistance of the material are remarkably improved.

Description

Technical Field

[0001] This invention relates to the field of alloy materials technology, and in particular to an H65 brass alloy doped with the rare earth element yttrium, its preparation method, and its application. Background Technology

[0002] H65 brass (Cu-Zn alloy, containing approximately 65wt% copper) is widely used in electronics, hardware, and pipe fittings due to its good hot and cold working properties, moderate strength, and excellent electrical and thermal conductivity. However, with the increasing demands for material performance in industrial development, traditional H65 brass has limitations in the following aspects: insufficient strength and hardness, making its mechanical properties prone to inadequacy under high loads or high-frequency friction conditions; and limited corrosion resistance, especially in environments containing Cl. - In environments with corrosive media such as SO2, H65 brass is prone to dezincification corrosion or stress corrosion cracking. Therefore, it is urgent to study methods for modifying H65 brass to overcome its limitations in these aspects. Summary of the Invention

[0003] The purpose of this invention is to provide an H65 brass alloy doped with the rare earth element yttrium, its preparation method, and its application. By adding 0.5-0.35 wt% of the rare earth element yttrium (Y) to H65 brass during the smelting stage, the Y is used to purify impurities in H65 brass, refine the grains, adjust the composition of the α / β′ phase, inhibit the occurrence of dezincification reaction, and significantly improve the tensile strength, microhardness, and corrosion resistance of the material.

[0004] To achieve the above objectives, the present invention provides an H65 brass alloy doped with the rare earth element yttrium. Based on a 100% mass fraction of the H65 brass alloy doped with the rare earth element yttrium, it comprises 65% copper, 0.05-0.35% yttrium, and the remainder is zinc.

[0005] Preferably, based on 100% by mass of the H65 brass alloy doped with the rare earth element yttrium, the mass fraction of the rare earth element yttrium in the alloy is 0.05%, 0.1%, 0.15%, 0.2%, 0.25%, 0.3%, and 0.35%.

[0006] Preferably, the amount of rare earth element yttrium added to the alloy is obtained based on thermodynamic calculations and through phase transformation.

[0007] This invention also provides a method for preparing H65 brass alloy doped with the rare earth element yttrium, comprising the following steps: S1. Mix the rare earth element yttrium with H65 brass, stir, and heat to melt; S2. After smelting, the temperature is lowered to obtain H65 brass alloy doped with the rare earth element yttrium.

[0008] Preferably, in S1, the smelting method includes vacuum induction furnace smelting.

[0009] Preferably, in S1, the stirring speed is 50-60 rpm and the stirring time is 5-10 min.

[0010] Preferably, in S1, the heating process begins with a temperature increase of 10-15 degrees Celsius. Heating at a rate of min to 600-610 Then 100-110 The temperature continues to rise at a rate of min.

[0011] Preferably, in S1, the melting temperature is 1100-1150°C. The melting time is 40-50 minutes, and the vacuum degree of melting is 3. 10 -3 -8 10 -3 Pa.

[0012] Preferably, in S2, the cooling process is carried out at 100-110°C. Cool to 18-25 at a rate of min. .

[0013] This invention also provides an application of an H65 brass alloy doped with the rare earth element yttrium, which is used as a metallic material in marine engineering and electronic heat dissipation.

[0014] Therefore, the present invention employs the above-mentioned H65 brass alloy doped with the rare earth element yttrium, its preparation method, and its application, which has the following beneficial effects: (1) Based on thermodynamic calculations, the range of yttrium addition is 0.5-0.35wt% through phase change. During the smelting stage, rare earth element yttrium is added to H65 brass to purify impurities in H65 brass and significantly improve the tensile strength, microhardness and corrosion resistance of H65 brass.

[0015] (2) In this invention, the addition of the rare earth element yttrium adjusts the composition of the α / β′ phase in H65 brass. Without doping, H65 brass is an α+β′ two-phase brass with a α / β′ two-phase ratio of 78%. 22%; When the yttrium doping concentration is between 0.05wt% and 0.15wt%, it has little effect on the α-phase structure, does not induce a phase transformation, and the α-phase remains dominant, while the β′ phase is not significantly enhanced; when the doping concentration reaches 0.25wt%, yttrium may induce lattice distortion, promote the precipitation or transformation of the β′ phase, and simultaneously affect the segregation behavior of Zn, causing the α-phase peak intensity to weaken and the β′ phase to begin to strengthen, with the ratio of the two phases changing to 67%. 33%; when the doping concentration was further increased to 0.35 wt%, the highly doped yttrium significantly promoted the precipitation and stabilization of the β′ phase, resulting in the β′ phase becoming the dominant structure, a significant decrease in the peak intensity of the α phase, and a change in the ratio of the two phases to 65%. 35%. That is, within the doping range of 0.05-0.35wt%, as the yttrium doping ratio increases, the proportion of the α phase decreases and the proportion of the β′ phase increases.

[0016] (3) In this invention, the original H65 brass sample grain size is between 49.48-44.67 μm. With the addition of yttrium, when the addition amount is 0.25 wt%, the grain size shrinks to between 29.28-36.67 μm. The addition of rare earth element yttrium promotes the refinement of α phase grains, causing β′ phase to precipitate in a smaller grain boundary region, making it difficult to form a continuous network, while improving strength and plasticity.

[0017] (4) When the amount of yttrium added in this invention is 0.25%, the H65 brass alloy has the best performance. Its tensile strength is increased by about 21%, its elongation is increased by about 46%, its hardness is increased by about 60%, its corrosion current density is reduced by about 61.5%, and its self-corrosion potential is positively shifted by 140mV, indicating that its mechanical properties, corrosion resistance and hardness have been significantly improved.

[0018] (5) The method of the present invention is simple, the composition is controllable, and the process is highly adaptable, making it suitable for large-scale industrial preparation of H65 brass alloy.

[0019] The technical solution of the present invention will be further described in detail below with reference to the accompanying drawings and embodiments. Attached Figure Description

[0020] Figure 1 The Scheil solidification curves and reproduced Cu-Zn binary phase diagrams of the H65 brass alloys doped with rare earth element yttrium prepared in Examples 1-7 of this invention are shown. Figure 2 These are planar dimensional diagrams (unit: mm) of the H65 brass alloys doped with rare earth element yttrium prepared in Examples 1-7 of this invention during tensile testing. Figure 3 The tensile properties of the H65 brass alloys doped with rare earth element yttrium prepared in Examples 1-7 of this invention are shown. Figure 4The X-ray diffraction (XRD) patterns of the H65 brass alloy doped with rare earth element yttrium prepared in Examples 1-7 of this invention are shown. Figure 5 These are EPMA electron scanning images of the H65 brass alloys doped with rare earth element yttrium prepared in Examples 1, 3, 5 and 7 of this invention; Figure 6 These are the electrochemical polarization curves of the yttrium-doped H65 brass alloys prepared in Examples 1-7 of this invention. Figure 7 This is a hardness variation curve of the H65 brass alloy doped with rare earth element yttrium prepared in Examples 1-7 of this invention. Detailed Implementation

[0021] The technical solution of the present invention will be further described below with reference to the accompanying drawings and embodiments.

[0022] Unless otherwise defined, the technical or scientific terms used in this invention shall have the ordinary meaning as understood by one of ordinary skill in the art to which this invention pertains.

[0023] In this invention, unless otherwise specified, the test materials and instruments are all conventional test materials in the field and can be purchased through commercial channels.

[0024] Example 1 This invention provides an H65 brass alloy doped with the rare earth element yttrium. The amount of yttrium added to the alloy is obtained based on thermodynamic calculations and through phase transformation. The H65 brass alloy doped with yttrium comprises 65% copper, 0.05% yttrium, and the remainder is zinc, based on a 100% mass fraction.

[0025] The preparation method of the above-mentioned H65 brass alloy doped with the rare earth element yttrium includes the following steps: S1. Take 0.0678g of rare earth element yttrium and 133.56g of H65 brass and mix them in a vacuum induction melting furnace. The vacuum degree of the melting furnace is 8. 10 -3 Pa, stir at 50 rpm for 6 minutes, first at 10 Heating to 600 at a rate of min Then 100 The temperature continued to rise at a rate of min to 1100. Melt for 45 minutes; S2. After smelting, at 100 Cooling rate to 25 min H65 brass alloy doped with the rare earth element yttrium was obtained, denoted as 0.05Y.

[0026] Example 2 This invention provides an H65 brass alloy doped with the rare earth element yttrium. The amount of yttrium added to the alloy is obtained based on thermodynamic calculations and through phase transformation. The H65 brass alloy doped with yttrium comprises 65% copper, 0.1% yttrium, and the remainder zinc, based on a 100% mass fraction.

[0027] The preparation method of the above-mentioned H65 brass alloy doped with the rare earth element yttrium includes the following steps: S1. Take 0.1336g of rare earth element yttrium and 133.56g of H65 brass and mix them in a vacuum induction melting furnace. The vacuum degree of the melting furnace is 8. 10 -3 Pa, stir at 50 rpm for 6 minutes, first at 10 Heating to 600 at a rate of min Then 100 The temperature continued to rise at a rate of min to 1100. Melt for 45 minutes; S2. After smelting, at 100 Cooling rate to 25 min H65 brass alloy doped with the rare earth element yttrium was obtained, denoted as 0.1Y.

[0028] Example 3 This invention provides an H65 brass alloy doped with the rare earth element yttrium. The amount of yttrium added to the alloy is obtained based on thermodynamic calculations and through phase transformation. The H65 brass alloy doped with yttrium comprises 65% copper, 0.15% yttrium, and the remainder zinc, based on a 100% mass fraction.

[0029] The preparation method of the above-mentioned H65 brass alloy doped with the rare earth element yttrium includes the following steps: S1. Take 0.2006g of rare earth element yttrium and 133.56g of H65 brass and mix them in a vacuum induction melting furnace. The vacuum degree of the melting furnace is 8. 10 -3 Pa, stir at 50 rpm for 6 minutes, first at 10 Heating to 600 at a rate of min Then 100 The temperature continued to rise at a rate of min to 1100. Melt for 45 minutes; S2. After smelting, at 100 Cooling rate to 25 min H65 brass alloy doped with the rare earth element yttrium was obtained, denoted as 0.15Y.

[0030] Example 4 This invention provides an H65 brass alloy doped with the rare earth element yttrium. The amount of rare earth element added to the alloy is obtained based on thermodynamic calculations and through phase transformation. The H65 brass alloy doped with yttrium comprises 65% copper, 0.2% yttrium, and the remainder zinc, based on a 100% mass fraction.

[0031] The preparation method of the above-mentioned H65 brass alloy doped with the rare earth element yttrium includes the following steps: S1. Take 0.2671g of rare earth element yttrium and 133.56g of H65 brass and mix them in a vacuum induction melting furnace. The vacuum degree of the melting furnace is 8. 10 -3 Pa, stir at 50 rpm for 6 minutes, first at 10 Heating to 600 at a rate of min Then 100 The temperature continued to rise at a rate of min to 1100. Melt for 45 minutes; S2. After smelting, at 100 Cooling rate to 25 min H65 brass alloy doped with the rare earth element yttrium was obtained, denoted as 0.2Y.

[0032] Example 5 This invention provides an H65 brass alloy doped with the rare earth element yttrium. The amount of yttrium added to the alloy is obtained through thermodynamic calculations and phase transformation. Based on a 100% mass fraction of the yttrium-doped H65 brass alloy, it comprises 65% copper, 0.25% yttrium, and the remainder is zinc.

[0033] The preparation method of the above-mentioned H65 brass alloy doped with the rare earth element yttrium includes the following steps: S1. Take 0.3339g of rare earth element yttrium and 133.56g of H65 brass and mix them in a vacuum induction melting furnace. The vacuum degree of the melting furnace is 8. 10 -3 Pa, stir at 50 rpm for 6 minutes, first at 10 Heating to 600 at a rate of min Then 100 The temperature continued to rise at a rate of min to 1100. Melting for 42 minutes; S2. After smelting, at 100 Cooling rate to 25 min H65 brass alloy doped with the rare earth element yttrium was obtained, denoted as 0.25Y.

[0034] Example 6 This invention provides an H65 brass alloy doped with the rare earth element yttrium. The amount of yttrium added to the alloy is obtained based on thermodynamic calculations and through phase transformation. The H65 brass alloy doped with yttrium comprises 65% copper, 0.3% yttrium, and the remainder zinc, based on a 100% mass fraction.

[0035] The preparation method of the above-mentioned H65 brass alloy doped with the rare earth element yttrium includes the following steps: S1. Take 0.4007g of rare earth element yttrium and 133.56g of H65 brass and mix them in a vacuum induction melting furnace with a vacuum degree of 8. 10 -3 Pa, stir at 50 rpm for 6 minutes, first at 10 Heating to 600 at a rate of min Then 100 The temperature continued to rise at a rate of min to 1100. Melt for 45 minutes; S2. After smelting, at 100 Cooling rate to 25 min H65 brass alloy doped with the rare earth element yttrium was obtained, denoted as 0.3Y.

[0036] Example 7 This invention provides an H65 brass alloy doped with the rare earth element yttrium. The amount of yttrium added to the alloy is obtained based on thermodynamic calculations and through phase transformation. The H65 brass alloy doped with yttrium comprises 100% copper, 0.35% yttrium, and the remainder is zinc.

[0037] The preparation method of the above-mentioned H65 brass alloy doped with the rare earth element yttrium includes the following steps: S1. Take 0.4675g of rare earth element yttrium and 133.56g of H65 brass and mix them in a vacuum induction melting furnace. The vacuum degree of the melting furnace is 8. 10 -3 Pa, stir at 50 rpm for 6 minutes, first at 10 Heating to 600 at a rate of min Then 100 The temperature continued to rise at a rate of min to 1100. Melt for 45 minutes; S2. After smelting, at 100 Cooling rate to 25 min H65 brass alloy doped with the rare earth element yttrium was obtained, denoted as 0.35Y.

[0038] The thermodynamic data of the Cu-Zn-Y ternary phase diagram were calculated using the Scheil module in Thermo-Calc software to obtain the composition of the main and secondary phases in the non-equilibrium solidification as-cast microstructure of the alloy. The composition and changes of the intermediate phase in the as-cast state of the ingot were also calculated using the Scheil module, and the results are as follows: Figure 1 As shown, where Figure 1 In the figure, (a), (b), (c), (d), (e), (f), and (g) are the Scheil solidification curves of the H65 brass alloys doped with rare earth element yttrium prepared in Examples 1-7, respectively, and (h) is the reproduced Cu-Zn binary phase diagram.

[0039] from Figure 1 From (a)-(g), it can be seen that when the yttrium doping amount is 0.05-0.35 wt% and the Cu:Zn ratio is approximately 65%:35%, the main phase composition is α phase and β′ phase; from Figure 1 As can be seen from (h) in the figure, the H65 brass alloy is composed of two phases, α and β′, based on the Cu-Zn binary phase diagram (which is the same as the EPMA test data below). Based on the composition of the H65 brass phase, the addition of Y element is determined to regulate the ratio and morphology of the two phases in order to optimize the alloy properties.

[0040] The H65 brass alloy samples doped with rare earth element yttrium prepared in Examples 1-7 were wire-cut and then polished. The planar dimensions are as follows: Figure 2 As shown in the figure, the unit is mm. A 0.1mm loss was allowed when cutting the sample. After grinding, the sample thickness was 2mm. Figure 2 (The thickness is 2.1 mm, which is the cutting thickness). Tensile tests were performed using an LD26.105 microcomputer-controlled electronic universal testing machine, and the results are as follows. Figure 3 As shown, from Figure 3 As can be seen, the doping amount of yttrium with the best mechanical properties is 0.25 wt%.

[0041] The H65 brass alloys doped with rare earth element yttrium prepared in Examples 1, 3, 5, and 7 were characterized by X-ray diffraction (XRD), and the results are as follows: Figure 4 As shown, where Figure 4 In the figure, (a) is the refined XRD pattern of H65 brass, (b), (c), (d), and (e) are the refined XRD patterns of H65 brass alloys doped with rare earth element yttrium prepared in Examples 1, 3, 5, and 7, respectively, and (f) is the XRD comparison image.

[0042] from Figure 4 As can be seen, with the increase of yttrium doping, a distinct α-brass diffraction peak appears at H65 in the XRD diffraction pattern, indicating that the structure is dominated by the α phase with a small amount of β′ brass, suggesting that in the undoped state, it is an α+β′ two-phase brass. When the yttrium doping amount is 0.05wt%-0.15wt%, the α phase remains dominant, and the peak shape and position remain basically unchanged; the β′ phase does not show significant enhancement, indicating that a small amount of yttrium doping has little effect on the phase structure and does not induce a phase transition. When the yttrium doping amount is 0.25wt%, the α phase peak intensity weakens, and the β′ phase begins to enhance; further yttrium doping may induce lattice distortion, promote the precipitation or transformation of the β′ phase, and simultaneously affect the segregation behavior of Zn. When the yttrium doping concentration was 0.35 wt%, multiple distinct β′ phase diffraction peaks appeared, while the α phase peak intensity decreased significantly; this indicates a significant structural transformation, with the β′ phase becoming the dominant structure. High yttrium doping promotes β′ phase precipitation and stabilizes the β′ phase. Further XRD refinement revealed that in the undoped state… The initial two-phase ratio was 78% / 22%. After doping, the two-phase ratio changed: 77% / 23% with a doping concentration of 0.05%, 75% / 25% with 0.15%, 67% / 33% with 0.25%, and 65% / 35% with 0.35%. This ratio continued to increase with increasing doping concentration (within the range of 0.05-0.35 wt%). The ratio of the two phases shows a downward trend.

[0043] The H65 brass alloys doped with rare earth element yttrium prepared in Examples 1, 3, 5, and 7 were characterized using electron probe microanalysis (EPMA). The results are as follows: Figure 5 As shown, where Figure 5 In the middle (a), the EPMA electron scan image of H65 brass is shown. (b), (c), (d), and (e) are the EPMA electron scan images of H65 brass alloys doped with rare earth element yttrium prepared in Examples 1, 3, 5, and 7, respectively.

[0044] Figure 5In (a), the black portion represents α-brass, and the white portion represents the β′ phase. It can be seen that the β′ phase is distributed in a network structure within the α phase. Zn is enriched at grain boundaries or the boundaries of the α phase (face-centered cubic structure), promoting the precipitation of the β′ phase along the α phase grain boundaries, forming a continuous or semi-continuous network structure. The β′ phase has high hardness but poor plasticity; its network distribution easily becomes a crack propagation path, reducing the material's toughness. The electrochemical differences between the β′ and α phases may accelerate localized corrosion (such as dezincification).

[0045] from Figure 5 As can be seen in (b), the network structure is still obvious, indicating that a small amount of yttrium doping has little effect on the phase structure; with the increase of doping amount, from Figure 5 As can be seen in (c), the network structure transforms into isolated particles or short rods, but still retains a fine network structure; from Figure 5 As shown in (d), the network structure becomes significantly discontinuous, with short rod-shaped structures becoming the dominant structure. Yttrium has a strong affinity for Zn, causing Zn to accumulate around it, reducing the enrichment of free Zn at the α-phase grain boundaries, thus decreasing the tendency for continuous network precipitation of the β′ phase. Crystal size measurements of the obtained microscopic images using ImageJ software revealed that the original H65 sample had a grain size between 49.48 and 44.67 μm; however, with the addition of yttrium (0.25 wt%), the grain size shrank to between 29.28 and 36.67 μm, indicating that the addition of yttrium promoted α-phase grain refinement (grain size reduction of 20%-48%), causing the β′ phase to precipitate in smaller grain boundary regions, making it difficult to form a continuous network, while simultaneously improving strength and plasticity. However, with further increases in the amount added, from Figure 5 As can be seen from (e), the β′ phase becomes thinner and less distinct, accompanied by a decrease in mechanical properties.

[0046] The corrosion resistance of the yttrium-doped H65 brass alloys prepared in Examples 1-7 was tested, simulating their corrosion in seawater (3.5 wt% NaCl solution). The results are as follows: Figure 6 As shown, from Figure 6 As can be seen, compared with undoped H65 brass, the alloy doped with 0.25wt% yttrium showed a reduction in corrosion current density of approximately 61.5% and a positive shift in self-corrosion potential of 140mV, indicating stronger corrosion resistance. This doping ratio exhibited the best corrosion resistance under the experimental conditions, significantly improving the material's service stability in corrosive environments. This may be because yttrium enriches on the brass surface, promoting the formation of a dense Y₂O₃ / Cu₂O composite oxide film. Simultaneously, the addition of yttrium reduces Zn grain boundary segregation, causing the β′ phase to change from a continuous network to a discrete distribution, thus reducing interphase galvanic corrosion.

[0047] The hardness of the H65 brass alloys doped with rare earth element yttrium prepared in Examples 1-7 was tested using an HVS-1000Z microhardness tester and the HV1 Vickers scale. The results are as follows: Figure 7 As shown, from Figure 7 As can be seen, the alloy hardness increases continuously with the addition of yttrium, reaching its peak when the doping amount reaches 0.25wt%, thus improving hardness while retaining its toughness.

[0048] Therefore, the present invention adopts the above-mentioned H65 brass alloy doped with rare earth element yttrium and its preparation method. By adding 0.5-0.35wt% of rare earth element yttrium to H65 brass during the smelting stage, the yttrium is used to purify impurities in H65 brass, refine grains, adjust the composition of α / β′ phase, inhibit the occurrence of dezincification reaction, and significantly improve the tensile strength, microhardness and corrosion resistance of the material.

[0049] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and not to limit them. Although the present invention has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can still be made to the technical solutions of the present invention, and these modifications or equivalent substitutions cannot cause the modified technical solutions to deviate from the spirit and scope of the technical solutions of the present invention.

Claims

1. A H65 brass alloy doped with the rare earth element yttrium, characterized in that: The H65 brass alloy doped with yttrium is 100% by mass, including 65% of copper element, 0.05-0.35% of yttrium, and the rest of zinc.

2. The H65 brass alloy doped with yttrium according to claim 1, characterized in that: The H65 brass alloy doped with yttrium is 100% by mass, including 65% of copper element, 0.05-0.35% of yttrium, and the rest of zinc.

3. A method of producing a H65 brass alloy doped with the rare earth element yttrium according to any one of claims 1-2, characterized in that: The method comprises the following steps: S1, mixing yttrium and H65 brass, stirring, and heating for smelting; S2, after smelting, cooling to obtain H65 brass alloy doped with yttrium.

4. The method for preparing the H65 brass alloy doped with yttrium rare earth element according to claim 3, characterized in that: In S1, the smelting method comprises vacuum induction smelting furnace smelting.

5. The method for preparing the H65 brass alloy doped with yttrium rare earth element according to claim 3, characterized in that: In S1, the stirring speed is 50-60 rpm, and the stirring time is 5-10 min.

6. The method for preparing the H65 brass alloy doped with yttrium rare earth element according to claim 3, characterized in that: In S1, the process of temperature rising is first to rise to 600-610 °C at a rate of 10-15 °C / min, and then to continue rising at a rate of 100-110 °C / min.

7. The method for preparing the H65 brass alloy doped with yttrium rare earth element according to claim 3, characterized in that: In S1, the temperature of smelting is 1100-1150 , the time of smelting is 40-50 min, and the vacuum degree of smelting is 3 10 -3 -8 10 -3 Pa.

8. The method for preparing the H65 brass alloy doped with yttrium rare earth element according to claim 3, characterized in that: In S2, the process of cooling is to cool to 18-25 at a rate of 100-110 min.

9. Use of H65 brass alloy doped with rare earth element yttrium, characterized in that: The H65 brass alloy doped with yttrium according to any one of claims 1-2 or prepared by the preparation method of the H65 brass alloy doped with yttrium according to any one of claims 3-8 is used as a metal material in the fields of marine engineering and electronic heat dissipation.

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