WO2022152212A1 - Alliage de magnésium mg-al, procédé de préparation pour tube constitué d'alliage de magnésium mg-al, application d'alliage de magnésium mg-al - Google Patents

Alliage de magnésium mg-al, procédé de préparation pour tube constitué d'alliage de magnésium mg-al, application d'alliage de magnésium mg-al Download PDF

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WO2022152212A1
WO2022152212A1 PCT/CN2022/071812 CN2022071812W WO2022152212A1 WO 2022152212 A1 WO2022152212 A1 WO 2022152212A1 CN 2022071812 W CN2022071812 W CN 2022071812W WO 2022152212 A1 WO2022152212 A1 WO 2022152212A1
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Prior art keywords
magnesium alloy
source
bar
mixed metal
liquid mixed
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PCT/CN2022/071812
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English (en)
Chinese (zh)
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房大庆
张晓茹
丁向东
杨军
刘鹏
龚保罗
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鼎泰(江苏)轻合金有限公司
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Priority to CN202280009957.5A priority Critical patent/CN116761905A/zh
Priority to EP22739088.7A priority patent/EP4279622A1/fr
Priority to AU2022208124A priority patent/AU2022208124A1/en
Priority to KR1020237027369A priority patent/KR20230131244A/ko
Priority to JP2023565644A priority patent/JP2024503546A/ja
Priority to US18/271,771 priority patent/US20240060159A1/en
Priority to CA3205147A priority patent/CA3205147A1/fr
Publication of WO2022152212A1 publication Critical patent/WO2022152212A1/fr
Priority to IL304327A priority patent/IL304327A/en

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    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C23/00—Alloys based on magnesium
    • C22C23/02—Alloys based on magnesium with aluminium as the next major constituent
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21C—MANUFACTURE OF METAL SHEETS, WIRE, RODS, TUBES OR PROFILES, OTHERWISE THAN BY ROLLING; AUXILIARY OPERATIONS USED IN CONNECTION WITH METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL
    • B21C23/00—Extruding metal; Impact extrusion
    • B21C23/02—Making uncoated products
    • B21C23/20—Making uncoated products by backward extrusion
    • B21C23/205—Making products of generally elongated shape
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C1/00—Making non-ferrous alloys
    • C22C1/02—Making non-ferrous alloys by melting
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22F—CHANGING THE PHYSICAL STRUCTURE OF NON-FERROUS METALS AND NON-FERROUS ALLOYS
    • C22F1/00—Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working
    • C22F1/06—Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working of magnesium or alloys based thereon
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21C—MANUFACTURE OF METAL SHEETS, WIRE, RODS, TUBES OR PROFILES, OTHERWISE THAN BY ROLLING; AUXILIARY OPERATIONS USED IN CONNECTION WITH METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL
    • B21C23/00—Extruding metal; Impact extrusion
    • B21C23/002—Extruding materials of special alloys so far as the composition of the alloy requires or permits special extruding methods of sequences

Definitions

  • the invention relates to a Mg-Al series magnesium alloy, a preparation method of the magnesium alloy pipe material and the application of the Mg-Al series magnesium alloy, and belongs to the technical field of alloy materials.
  • Magnesium alloy is by far the lightest metal structural material, its density is only 2/3 of aluminum and 1/4 of steel, and it has high specific strength and specific stiffness. In addition, magnesium alloys also have many excellent properties such as good damping, machinability and thermal conductivity, as well as easy recycling and regeneration, making their application fields increasingly expanded.
  • Magnesium alloys mainly include Mg-Al series and Mg-Zn-Zr series magnesium alloys, and Mg-Al series magnesium alloys have been widely used because of their lower preparation costs and simpler preparation methods.
  • Mg-Al series magnesium alloys have been widely used because of their lower preparation costs and simpler preparation methods.
  • the elongation of traditional Mg-Al series alloys is poor, and it is prone to fracture when subjected to external impact deformation or cyclic loading; and magnesium alloys are generally connected to each other by welding during application, and the welding loss rate of traditional Mg-Al series alloys after welding If it is larger, it not only causes a lot of waste of resources, but also affects the firmness and appearance of welding.
  • the present invention provides a Mg-Al magnesium alloy with high elongation and low welding loss rate, and provides a Mg-Al magnesium alloy pipe material
  • the preparation method in addition, an application of the Mg-Al series magnesium alloy in the fields of vehicle equipment and medical equipment is also provided.
  • the Mg-Al series magnesium alloy described in the present invention in terms of weight percentage, includes the following components: Al 7.0-8.6%, RE 0.8-2.0%, Mn 0.2-0.8%, and the balance is Mg, the elongation of this magnesium alloy is 15-22%.
  • the elongation of the Mg-Al-based magnesium alloy is 17-21.6%.
  • the welding loss rate of the Mg-Al-based magnesium alloy is less than 6%.
  • the yield strength of the Mg-Al-based magnesium alloy is 182-235 MPa, and the tensile strength is 306-342 MPa.
  • the weight percentage of Al in the Mg-Al magnesium alloy is 7.0-8.2%
  • the weight percentage of RE is 1.1-2.0%
  • the weight percentage of Mn is 0.4-0.8%.
  • Magnesium alloys within the above parameter range can obtain lower welding loss rate (below 5.5%), higher elongation and higher strength.
  • the weight percentage of Al in the Mg-Al-based magnesium alloy is 7.8-8.2%
  • the weight percentage of RE is 1.3-1.9%
  • the weight percentage of Mn is 0.5-0.8%
  • RE The weight percentage of Y is 0.8-1.6%
  • the mass percentage of Ce is 0-0.8%.
  • the obtained magnesium alloy has an elongation rate of 17.4-21.6%, a welding loss rate of less than 5%, a yield strength of 220-235 MPa, and a tensile strength of 320-342 MPa.
  • the weight percentage of Al in the Mg-Al-based magnesium alloy is 7.8-8.2%
  • the weight percentage of RE is 1.5-1.9%
  • the weight percentage of Mn is 0.5-0.8%
  • the weight percentage of Y in RE is 0.8%
  • the mass percentage of Ce is 0.5-0.8%.
  • RE includes at least one of La, Ce, Nd, Y, Gd, Ho, Dy and Er.
  • RE is dominated by Y and Ce, and other rare earth elements are in trace amounts.
  • the preparation method of a Mg-Al series magnesium alloy pipe according to the present invention comprises the following steps:
  • the Al source, RE source, Mn source and Mg source are mixed and smelted into a liquid mixed metal;
  • the heat-treated bar is extruded to obtain a magnesium alloy tube.
  • the application of the Mg-Al series magnesium alloy of the present invention is to use the Mg-Al series magnesium alloy in the fields of vehicle equipment and medical equipment.
  • the advantages of the present invention are: the Mg-Al magnesium alloy of the present invention has high elongation, and the elongation of the formed pipe can reach 15-22%, so that the magnesium alloy can It can withstand large plastic deformation; at the same time, the welding loss rate of this Mg-Al magnesium alloy is very low, less than 6%, which greatly reduces the loss of strength of magnesium alloy profiles after welding, and ensures that magnesium alloy profiles are welded after welding.
  • the Mg-Al series magnesium alloy of the present invention also has high strength, the yield strength reaches 182-232 MPa, and the tensile strength reaches 306-340 MPa.
  • FIG. 1 is a flow chart of a preparation process of the Mg-Al system magnesium alloy of the present invention.
  • a Mg-Al-based magnesium alloy of the present invention in terms of weight percentage, comprises the following components: Al 7.0-8.6%, RE 0.8-2.0%, Mn 0.2-0.8%, and the balance is Mg.
  • the magnesium alloy of the present invention RE (rare earth element) and Mn are added to a certain ratio of Mg-Al series alloy, thereby improving the plasticity and strength of the magnesium alloy and reducing the welding loss rate of the alloy.
  • Mn can remove the impurity element Fe introduced during semi-continuous casting, which is beneficial to welding performance and mechanical properties, thereby reducing the welding loss rate; at the same time, Mn does not form compounds in magnesium, and can be used as heterogeneous nucleation particles to refine Grains, when extruded into tubes, promote dynamic recrystallization, refine grains and weaken texture, improving strength and plasticity.
  • the addition of RE can refine the grain size of magnesium alloys, improve the morphology of the ⁇ -strengthened phase of magnesium alloys, and enhance the strength and plasticity of magnesium alloys.
  • the strength of the magnesium alloy can be reflected by the yield strength and the tensile strength.
  • the yield strength of the pipe is in the range of 182-235MPa, preferably, the yield strength of the pipe is in the range of 220-235MPa; at the same time, the tensile strength of the Mg-Al series magnesium alloy pipe material is in the range of 306-342MPa, preferably 320-340MPa.
  • the elongation is directly related to the plasticity of the magnesium alloy.
  • the elongation of the pipe can reach 15-22%.
  • the elongation of the Mg-Al magnesium alloy pipe is 17-21.6%; the high elongation allows the magnesium alloy to withstand large plastic deformation and improves the application range of the magnesium alloy.
  • Welding strength loss rate is the strength loss rate of the welded specimen compared to the original profile specimen after the magnesium alloy profile is welded.
  • the welding strength loss rate of the Mg-Al-based magnesium alloy provided by the present invention is less than 6%, preferably, the welding strength loss rate is less than 5%, and more preferably, the welding strength loss rate is less than 4.3%.
  • the weight percent of Al in the Mg-Al-based magnesium alloy of the present invention is 7.0-8.6%, preferably, the weight percent of Al in the Mg-Al-based magnesium alloy is 7.0-8.2%; more preferably , the weight percentage of Al ranges from 7.8 to 8.2%.
  • the weight percentage of Al in the Mg-Al-based magnesium alloy is controlled within a certain range, the combination of Al element and Mg element has a second-phase strengthening effect, and during the forming process of the magnesium alloy, the best state (moderate volume) can be obtained. Fraction, shape and size) of the ⁇ -strengthening phase, thereby improving the strength of magnesium alloys.
  • the Al element in the solid solution part of the magnesium matrix can play a role in solid solution strengthening and improving plasticity.
  • the weight percentage of Al in the Mg-Al-based magnesium alloy is too high, for example, when the weight percentage of Al in the magnesium alloy is greater than 8.6%, due to the precipitation of coarse eutectic ⁇ phase, on the one hand, after welding, the precipitation is weakened The interfacial bonding ability of the phase and the matrix is easy to form microscopic pores at the interface of the matrix and the ⁇ phase, which increases the welding loss rate. Elongation decreased.
  • the weight percentage of Al in the magnesium alloy is too low, for example, less than 7%, it is not conducive to improving the plasticity due to the reduction of the Al element in the crystal.
  • the effect of the second phase strengthening is not conducive to the improvement of the strength of magnesium alloys; in addition, after welding, the grain growth of alloys containing less precipitates is more obvious, so the welding loss rate will increase.
  • the weight percent of RE in the Mg-Al-based magnesium alloy of the present invention is 0.8-2.0%, preferably, the weight percent of RE in the Mg-Al-based magnesium alloy is 1.1-2.0%, more preferably , the weight percentage of RE ranges from 1.3-1.9%.
  • the RE element after RE is added to the Mg-Al magnesium alloy, the RE element has a unique electronic arrangement structure and chemical characteristics.
  • Adding an appropriate amount of rare earth elements to the magnesium alloy can enhance the interatomic bonding force, reduce the diffusion rate of magnesium atoms, Increasing the recrystallization temperature of magnesium alloys, slowing down the growth rate of recrystallization, can significantly improve its formability and corrosion resistance; and RE is generally distributed in the grain boundaries, which can refine the grain size of magnesium alloys and improve the grain size of magnesium alloys. Due to the coordination ability between them, RE can also form a thermally stable ⁇ -strengthening phase during the forming process of magnesium alloys, which improves the strength and plasticity of magnesium alloys.
  • RE may include at least one of La, Ce, Nd, Y, Gd, Ho, Dy, and Er.
  • the RE elements in the Mg-Al-based magnesium alloy of the present invention are mainly Y and Ce, the weight percentage of Y is in the range of 0.8-1.6%, and the weight percentage of Ce is in the range of 0-0.8%.
  • the present invention provides a preparation method of Mg-Al series magnesium alloy, comprising the following steps:
  • the ingot is homogenized and heat treated at the first temperature
  • the casting process in S102 can be realized by a semi-continuous casting process.
  • the semi-continuous process due to rapid water cooling, the obtained grain size is small, and the fine grain can improve the strength and elongation of the alloy at the same time.
  • the first temperature range is 360-400°C
  • the heat treatment time is 6-10h.
  • the heat treatment process before extrusion can increase the content of Al element in the matrix, increase the slip system, and improve the elongation of the alloy.
  • step S102 the ingot is cast into a bar, that is, the liquid mixed metal is cast into a bar; in step S104, the heat-treated bar is back-extruded to obtain Mg- Al-based magnesium alloy pipes.
  • the process parameters of back extrusion molding include extrusion temperature, extrusion ratio and extrusion speed, wherein, the extrusion temperature range is 280-330 ° C, the extrusion ratio is 49:1, and the extrusion speed is in the range of 8-15mm/ s.
  • the magnesium alloy provided by the present invention will be described in detail below by taking the preparation of Mg-Al series magnesium alloy pipes as an example, through specific examples and comparative examples.
  • the magnesium alloy pipe obtained by the preparation method provided in the embodiment of the present invention has a large elongation and can withstand large plastic deformation, and the magnesium alloy pipe has a low welding loss rate, and these properties improve the application range of the magnesium alloy ; At the same time, the magnesium alloy has higher yield strength and tensile strength.
  • Mg-Al magnesium alloys include: Al 7g, Y 0.8g, Mn 0.5g, Mg 91.7g.
  • the Mg-Al series magnesium alloy is obtained by the following preparation method, which specifically includes:
  • the heat-treated bar is back-extruded at a speed of 12 mm/s to obtain a magnesium alloy pipe, the extrusion temperature is 300°C, and the extrusion ratio is 49:1.
  • Mg-Al series magnesium alloys include: Al 7.4g, Y 0.8g, Mn 0.5g, Mg 91.3g.
  • the Mg-Al series magnesium alloy is obtained by the following preparation method, which specifically includes:
  • the heat-treated bar is back-extruded at a speed of 8 mm/s to obtain a magnesium alloy pipe, the extrusion temperature is 280°C, and the extrusion ratio is 49:1.
  • Mg-Al magnesium alloys include: Al 7.8g, Y 0.8g, Mn 0.5g, Mg 91.9g.
  • the Mg-Al series magnesium alloy is obtained by the following preparation method, which specifically includes:
  • the heat-treated bar is back-extruded at a speed of 12 mm/s to obtain a magnesium alloy pipe, the extrusion temperature is 300°C, and the extrusion ratio is 49:1.
  • Mg-Al magnesium alloys include: Al 8.2g, Y 0.8g, Mn 0.5g, Mg 90.5g.
  • the Mg-Al series magnesium alloy is obtained by the following preparation method, which specifically includes:
  • the heat-treated bar is back-extruded at a speed of 10 mm/s to obtain a magnesium alloy pipe, the extrusion temperature is 330°C, and the extrusion ratio is 49:1.
  • Mg-Al magnesium alloys include: Al 8.6g, Y 0.8g, Mn 0.5g, Mg 90.1g.
  • the Mg-Al series magnesium alloy is obtained by the following preparation method, which specifically includes:
  • the heat-treated bar is back-extruded at a speed of 12 mm/s to obtain a magnesium alloy pipe, the extrusion temperature is 300°C, and the extrusion ratio is 49:1.
  • Mg-Al magnesium alloys include: Al 7.8g, Y 1.2g, Mn 0.5g, Mg 90.5g.
  • the Mg-Al series magnesium alloy is obtained by the following preparation method, which specifically includes:
  • the heat-treated bar is back-extruded at a speed of 12 mm/s to obtain a magnesium alloy pipe, the extrusion temperature is 300°C, and the extrusion ratio is 49:1.
  • Mg-Al magnesium alloys include: Al 7.8g, Y 1.6g, Mn 0.5g, Mg 90.1g.
  • the Mg-Al series magnesium alloy is obtained by the following preparation method, which specifically includes:
  • the heat-treated bar is back-extruded at a speed of 12 mm/s to obtain a magnesium alloy pipe, the extrusion temperature is 300°C, and the extrusion ratio is 49:1.
  • Mg-Al magnesium alloys include: Al 7.8g, Y 0.8g, Ce 0.3g (RE 1.1%), Mn 0.5g, Mg 90.6g.
  • the Mg-Al series magnesium alloy is obtained by the following preparation method, which specifically includes:
  • the heat-treated bar is back-extruded at a speed of 12 mm/s to obtain a magnesium alloy pipe, the extrusion temperature is 300°C, and the extrusion ratio is 49:1.
  • Mg-Al magnesium alloys include: Al 7.8g, Y 1.2g, Ce 0.3g (RE 1.5%), Mn 0.5g, Mg 90.2g.
  • the Mg-Al series magnesium alloy is obtained by the following preparation method, which specifically includes:
  • the heat-treated bar is back-extruded at a speed of 12 mm/s to obtain a magnesium alloy pipe, the extrusion temperature is 300°C, and the extrusion ratio is 49:1.
  • Mg-Al magnesium alloys include: Al 7.8g, Y 0.8g, Ce 0.5g (RE 1.3%), Mn 0.5g, Mg 90.4g.
  • the Mg-Al series magnesium alloy is obtained by the following preparation method, which specifically includes:
  • the heat-treated bar is back-extruded at a speed of 12 mm/s to obtain a magnesium alloy pipe, the extrusion temperature is 300°C, and the extrusion ratio is 49:1.
  • Mg-Al magnesium alloys include: Al 7.8g, Y 0.8g, Ce 0.8g (RE 1.6%), Mn 0.5g, Mg 90.1g.
  • the Mg-Al series magnesium alloy is obtained by the following preparation method, which specifically includes:
  • the heat-treated bar is back-extruded at a speed of 12 mm/s to obtain a magnesium alloy pipe, the extrusion temperature is 300°C, and the extrusion ratio is 49:1.
  • Mg-Al magnesium alloys include: Al 7.8g, Y 0.8g, Ce 0.5g, La 0.1g (RE 1.4%), Mn 0.5g, Mg 90.3g.
  • the Mg-Al series magnesium alloy is obtained by the following preparation method, which specifically includes:
  • the heat-treated bar is back-extruded at a speed of 12 mm/s to obtain a magnesium alloy pipe, the extrusion temperature is 300°C, and the extrusion ratio is 49:1.
  • Mg-Al magnesium alloys include: Al 7.8g, Y 0.8g, Ce 0.5g, La 0.1g, Nd 0.1g (RE 1.5%), Mn 0.5g, Mg 90.2g.
  • the Mg-Al series magnesium alloy is obtained by the following preparation method, which specifically includes:
  • the heat-treated bar is back-extruded at a speed of 12 mm/s to obtain a magnesium alloy pipe, the extrusion temperature is 300°C, and the extrusion ratio is 49:1.
  • Mg-Al magnesium alloys include: Al 7.8g, Y 0.8g, Ce 0.5g, La 0.1g, Nd 0.1g, Gd 0.1g (RE 1.6%), Mn 0.5g, Mg 90.1g.
  • the Mg-Al series magnesium alloy is obtained by the following preparation method, which specifically includes:
  • the heat-treated bar is back-extruded at a speed of 12 mm/s to obtain a magnesium alloy tube, the extrusion temperature is 300°C, and the extrusion ratio is 49:1.
  • Mg-Al magnesium alloys include: Al 7.8g, Y 0.8g, Ce 0.5g, La 0.1g, Nd 0.1g, Gd 0.1g, Ho 0.1g (RE 1.7%), Mn 0.5g, Mg 90.1g.
  • the Mg-Al series magnesium alloy is obtained by the following preparation method, which specifically includes:
  • the heat-treated bar is back-extruded at a speed of 12 mm/s to obtain a magnesium alloy pipe, the extrusion temperature is 300°C, and the extrusion ratio is 49:1.
  • Mg-Al magnesium alloys include: Al 7.8g, Y 0.8g, Ce 0.5g, La 0.1g, Nd 0.1g, Gd 0.1g, Ho 0.1g, Dy 0.1g (RE 1.8%), Mn 0.5g, Mg 90.0g.
  • the Mg-Al series magnesium alloy is obtained by the following preparation method, which specifically includes:
  • the heat-treated bar is back-extruded at a speed of 12 mm/s to obtain a magnesium alloy pipe, the extrusion temperature is 300°C, and the extrusion ratio is 49:1.
  • Mg-Al magnesium alloys include: Al 7.8g, Y 0.8g, Ce 0.5g, La 0.1g, Nd 0.1g, Gd 0.1g, Ho 0.1g, Dy 0.1g, Er 0.1g (RE 1.9%), Mn 0.5g, Mg 89.9g.
  • the Mg-Al series magnesium alloy is obtained by the following preparation method, which specifically includes:
  • the heat-treated bar is back-extruded at a speed of 12 mm/s to obtain a magnesium alloy pipe, the extrusion temperature is 300°C, and the extrusion ratio is 49:1.
  • Mg-Al magnesium alloys include: Al 8.0g, Y 0.8g, Ce 0.5g (RE 1.3%), Mn 0.5g, Mg 90.4g.
  • the Mg-Al series magnesium alloy is obtained by the following preparation method, which specifically includes:
  • the heat-treated bar is back-extruded at a speed of 12 mm/s to obtain a magnesium alloy pipe, the extrusion temperature is 300°C, and the extrusion ratio is 49:1.
  • Mg-Al magnesium alloys include: Al 8.0g, Y 0.8g, Ce 0.5g, La 0.1g, Nd 0.1g, Gd 0.1g, Ho 0.1g, Dy 0.1g, Er 0.1g (RE 1.9%), Mn 0.5g, Mg 89.6g.
  • the Mg-Al series magnesium alloy is obtained by the following preparation method, which specifically includes:
  • the heat-treated bar is back-extruded at a speed of 12 mm/s to obtain a magnesium alloy pipe, the extrusion temperature is 300°C, and the extrusion ratio is 49:1.
  • Mg-Al magnesium alloys include: Al 8.2g, Y 0.8g, Ce 0.5g, La 0.1g, Nd 0.1g, Gd 0.1g (RE 1.6%), Mn 0.5g, Mg 89.7g.
  • the Mg-Al series magnesium alloy is obtained by the following preparation method, which specifically includes:
  • the heat-treated bar is back-extruded at a speed of 12 mm/s to obtain a magnesium alloy pipe, the extrusion temperature is 300°C, and the extrusion ratio is 49:1.
  • Mg-Al magnesium alloys include: Al 7.8g, Y 0.8g, Ce 0.5g (RE 1.3%), Mn 0.2g, Mg 90.7g.
  • the Mg-Al series magnesium alloy is obtained by the following preparation method, which specifically includes:
  • the heat-treated bar is back-extruded at a speed of 12 mm/s to obtain a magnesium alloy pipe, the extrusion temperature is 300°C, and the extrusion ratio is 49:1.
  • Mg-Al magnesium alloys include: Al 7.8g, Y 0.8g, Ce 0.5g (RE 1.3%), Mn 0.4g, Mg 90.5g.
  • the Mg-Al series magnesium alloy is obtained by the following preparation method, which specifically includes:
  • the heat-treated bar is back-extruded at a speed of 12 mm/s to obtain a magnesium alloy pipe, the extrusion temperature is 300°C, and the extrusion ratio is 49:1.
  • Mg-Al magnesium alloys include: Al 7.8g, Y 0.8g, Ce 0.5g (RE 1.3%), Mn 0.8g, Mg 90.1g.
  • the Mg-Al series magnesium alloy is obtained by the following preparation method, which specifically includes:
  • the heat-treated bar is back-extruded at a speed of 12 mm/s to obtain a magnesium alloy pipe, the extrusion temperature is 300°C, and the extrusion ratio is 49:1.
  • Mg-Al magnesium alloys include: Al 6.5g, Y 0.8g, Mn 0.5g, Mg 92.2g.
  • the Mg-Al series magnesium alloy is obtained by the following preparation method, which specifically includes:
  • the heat-treated bar is back-extruded at a speed of 12 mm/s to obtain a magnesium alloy pipe, the extrusion temperature is 300°C, and the extrusion ratio is 49:1.
  • Mg-Al magnesium alloys include: Al 9.6g, Y 0.8g, Mn 0.5g, Mg 89.1g.
  • the Mg-Al series magnesium alloy is obtained by the following preparation method, which specifically includes:
  • the heat-treated bar is back-extruded at a speed of 12 mm/s to obtain a magnesium alloy pipe, the extrusion temperature is 300°C, and the extrusion ratio is 49:1.
  • Mg-Al magnesium alloys include: Al 7g, Y 0.5g, Mn 0.5g, Mg 92.0g.
  • the Mg-Al series magnesium alloy is obtained by the following preparation method, which specifically includes:
  • the heat-treated bar is back-extruded at a speed of 12 mm/s to obtain a magnesium alloy pipe, the extrusion temperature is 300°C, and the extrusion ratio is 49:1.
  • Mg-Al series magnesium alloys include: Al 7g, Y 2.3g, Mn 0.5g, Mg 90.2g.
  • the Mg-Al series magnesium alloy is obtained by the following preparation method, which specifically includes:
  • the heat-treated bar is back-extruded at a speed of 12 mm/s to obtain a magnesium alloy pipe, the extrusion temperature is 300 ° C, and the extrusion ratio is 49:1.
  • Mg-Al series magnesium alloys include: Al 7g, Y 0.8g, Mg 92.2g.
  • the Mg-Al series magnesium alloy is obtained by the following preparation method, which specifically includes:
  • the heat-treated bar is back-extruded at a speed of 12 mm/s to obtain a magnesium alloy tube, the extrusion temperature is 300°C, and the extrusion ratio is 49:1.
  • the yield strength of the magnesium alloy pipes of Examples 1-23 can reach 182MPa or more, and the yield strength of the magnesium alloy pipes of Example 19 can reach 235MPa; the tensile strength can reach 306MPa or more, Example 19
  • the tensile strength of the magnesium alloy pipes in Example 17 reached 342MPa; the elongation was greater than 15%, and the elongation of the magnesium alloy pipes in Example 17 reached 21.6%;
  • the welding loss rate of the magnesium alloy pipes of Examples 15-17, 19-20 and 23 is less than 4%, and can be as low as 3.5%.
  • Comparing Example 1 with Comparative Examples 1 to 2 in Comparative Example 1, due to the low content of Al added, the yield strength and tensile strength of magnesium alloys are low, which are as low as 165Mpa and 287Mpa, respectively, and the welding loss rate increases. ; In Comparative Example 2, due to the excessively added Al content, the plasticity of the magnesium alloy deteriorated, and the elongation decreased to 12.7%, and at the same time, the welding loss rate increased significantly, increased to 7.3%.
  • the welding loss rate increases; the content of RE added in Comparative Example 4 is too high, although the yield strength and tensile strength of the magnesium alloy are improved, but the plastic deformation is obviously worse, the elongation is only 12.8%, and the welding loss rate is also somewhat increase.
  • the Mg-Al series magnesium alloy of the present invention can be applied to the fields of vehicle equipment and medical equipment.
  • the Mg-Al series magnesium alloy is formed into a bar, and after welding a plurality of magnesium alloy bars, it can be used as a wheelchair, a stretcher, a bicycle, a mountain
  • the load-bearing members and support members of equipment such as vehicles can reduce the weight of the above-mentioned equipment while ensuring the strength and stability of the above-mentioned equipment.

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  • Powder Metallurgy (AREA)

Abstract

La présente invention concerne le domaine technique des matériaux d'alliage. Un alliage de magnésium Mg-Al, un procédé de préparation d'un tube constitué de l'alliage de magnésium Mg-Al, et une application de l'alliage de magnésium Mg-Al sont divulgués. L'alliage de magnésium comprend, en pourcentage en poids, 7,0-8,6 % d'Al, 0,8-2,0 % de RE, 0,2-0,8 % de Mn, et le reste étant du Mg, et présente un allongement de 15-22 %. Le procédé de préparation d'un tube constitué de l'alliage de magnésium Mg-Al comprend : le mélange d'une source d'Al, d'une source de RE, d'une source de Mn et d'une source de Mg pour les fondre en un métal mélangé à l'état liquide ; le coulage en semi-continu du métal mélangé à l'état liquide en une barre ; le chauffage uniforme de la barre à 360-400 °C pendant 6-10 h ; et la réalisation d'une extrusion sur la barre chauffée pour former le tube constitué de l'alliage de magnésium Mg-Al. L'alliage de magnésium Mg-Al, selon la présente invention, présente un allongement élevé, et peut atteindre un allongement de 15-22 % après avoir été mis en forme de tube, de manière à résister à une grande déformation plastique ; de plus, l'alliage de magnésium Mg-Al présente une excellente performance de soudage, et présente un taux de perte de soudure inférieur à 6 %, ce qui permet de réduire considérablement la perte de résistance d'un profilé d'alliage de magnésium après soudage, et d'assurer la résistance du profilé d'alliage de magnésium après soudage. L'alliage de magnésium peut être utilisé dans le domaine de l'équipement de véhicule et des instruments médicaux.
PCT/CN2022/071812 2021-01-13 2022-01-13 Alliage de magnésium mg-al, procédé de préparation pour tube constitué d'alliage de magnésium mg-al, application d'alliage de magnésium mg-al WO2022152212A1 (fr)

Priority Applications (8)

Application Number Priority Date Filing Date Title
CN202280009957.5A CN116761905A (zh) 2021-01-13 2022-01-13 一种Mg-Al系镁合金及其管材的制备方法和应用
EP22739088.7A EP4279622A1 (fr) 2021-01-13 2022-01-13 Alliage de magnésium mg-al, procédé de préparation pour tube constitué d'alliage de magnésium mg-al, application d'alliage de magnésium mg-al
AU2022208124A AU2022208124A1 (en) 2021-01-13 2022-01-13 Mg-al magnesium alloy, preparation method for tube made of mg-al magnesium alloy, application of mg-al magnesium alloy
KR1020237027369A KR20230131244A (ko) 2021-01-13 2022-01-13 Mg-Al 마그네슘 합금, Mg-Al 마그네슘 합금 튜브의제조방법, Mg-Al 마그네슘 합금의 용도
JP2023565644A JP2024503546A (ja) 2021-01-13 2022-01-13 Ｍｇ－Ａｌ系マグネシウム合金及びそのパイプ材の製造方法、並びにその応用
US18/271,771 US20240060159A1 (en) 2021-01-13 2022-01-13 Mg-al magnesium alloy, preparation method for tube made of mg-al magnesium alloy, application of mg-al magnesium alloy
CA3205147A CA3205147A1 (fr) 2021-01-13 2022-01-13 Alliage de magnesium mg-al, procede de preparation pour tube constitue d'alliage de magnesium mg-al, application d'alliage de magnesium mg-al
IL304327A IL304327A (en) 2021-01-13 2023-07-09 Magnesium alloy mg-al, method for making a tube made of magnesium alloy mg-al, and applications of magnesium alloy mg-al

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CN202110040804.4 2021-01-13
CN202110040804.4A CN112877575B (zh) 2021-01-13 2021-01-13 一种Mg-Al系镁合金及其管材的制备方法和应用

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CN112877575B (zh) * 2021-01-13 2022-03-15 鼎泰(江苏)轻合金有限公司 一种Mg-Al系镁合金及其管材的制备方法和应用
CN113635000B (zh) * 2021-08-27 2023-08-18 中国兵器工业第五九研究所 一种镁合金环件的挤轧复合成形方法

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CN102051509A (zh) * 2010-12-28 2011-05-11 西安工业大学 高强韧耐热Mg—Al—RE—Mn变形镁合金及其板材的制备方法
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AU2022208124A1 (en) 2023-07-27
IL304327A (en) 2023-09-01
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