WO2022152212A1 - Mg-al magnesium alloy, preparation method for tube made of mg-al magnesium alloy, application of mg-al magnesium alloy - Google Patents

Mg-al magnesium alloy, preparation method for tube made of mg-al magnesium alloy, application of mg-al magnesium alloy Download PDF

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Publication number
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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French (fr)
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 US18/271,771 priority Critical patent/US20240060159A1/en
Priority to KR1020237027369A priority patent/KR20230131244A/en
Priority to CN202280009957.5A priority patent/CN116761905A/en
Priority to JP2023565644A priority patent/JP2024503546A/en
Priority to EP22739088.7A priority patent/EP4279622A1/en
Priority to CA3205147A priority patent/CA3205147A1/en
Priority to AU2022208124A priority patent/AU2022208124A1/en
Publication of WO2022152212A1 publication Critical patent/WO2022152212A1/en
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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Abstract

The present invention relates to the technical field of alloy materials. Disclosed are an Mg-Al magnesium alloy, a preparation method for a tube made of the Mg-Al magnesium alloy, and an application of the Mg-Al magnesium alloy. The magnesium alloy comprises, in percentage by weight, 7.0-8.6% of Al, 0.8-2.0% of RE, 0.2-0.8% of Mn, and the balance of Mg, and has an elongation of 15-22%. The preparation method for a tube made of the Mg-Al magnesium alloy comprises: mixing an Al source, an RE source, an Mn source, and an Mg source to smelt into a liquid-state mixed metal; semi-continuously casting the liquid-state mixed metal into a bar; uniformly heating the bar at 360-400°C for 6-10 h; and performing extrusion forming on the heated bar to form the tube made of the Mg-Al magnesium alloy. The Mg-Al magnesium alloy provided by the present invention has a high elongation, and can reach an elongation of 15-22% after being formed into the tube, so as to withstand a large plastic deformation; moreover, the Mg-Al magnesium alloy has excellent welding performance, and has a welding loss rate of lower than 6%, thereby greatly reducing the loss of strength of a magnesium alloy profile after welding, and ensuring the strength of the magnesium alloy profile after welding. The magnesium alloy can be used in the field of vehicle equipment and medical instruments.

Description

一种Mg-Al系镁合金及其管材的制备方法和应用A kind of Mg-Al series magnesium alloy and its preparation method and application
相关申请的交叉引用CROSS-REFERENCE TO RELATED APPLICATIONS
本公开要求于2021年1月13日提交中国专利局的申请号为CN 202110040804.4、名称为“一种Mg-Al系镁合金及其管材的制备方法和应用”的中国专利申请的优先权，其全部内容通过引用结合在本公开中。This disclosure claims the priority of the Chinese patent application with the application number CN 202110040804.4 and the title of "A Mg-Al-based magnesium alloy and its preparation method and application" filed with the China Patent Office on January 13, 2021, which The entire contents of this disclosure are incorporated by reference.
技术领域technical field
本发明涉及一种Mg-Al系镁合金、该镁合金管材的制备方法以及该Mg-Al系镁合金的应用，属于合金材料技术领域。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.
背景技术Background technique
镁合金是迄今为止最轻的金属结构材料，其密度仅相当于铝的2/3，钢的1/4，而且其拥有很高的比强度与比刚度。此外，镁合金还具有良好的阻尼性、切削加工性和导热性以及易回收、再生等诸多优异的性能，使其应用领域日益扩大。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.
镁合金主要包括Mg-Al系和Mg-Zn-Zr系镁合金，而Mg-Al系镁合金因为其更低的制备成本与更简单的制备方法，得到了广泛了应用。但传统Mg-Al系列合金的延伸率较差，在受到外力冲击变形或循环加载时容易发生断裂；而且镁合金在应用时一般通过焊接相互连接，传统Mg-Al系列合金经焊接后焊接损失率较大，不仅造成了资源大量浪费，也影响了焊接的牢固性和外观美感。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. However, 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.
发明内容SUMMARY OF THE INVENTION
发明目的：针对现有Mg-Al系镁合金存在的问题，本发明提供一种具备高延伸率和低焊接损失率的Mg-Al系镁合金，并提供一种该Mg-Al系镁合金管材的制备方法；另外，还提供了一种该Mg-Al系镁合金用于车辆设备和医疗器械领域的应用。Purpose of the invention: In view of the problems existing in the existing Mg-Al magnesium alloys, 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.
技术方案：本发明所述的一种Mg-Al系镁合金，按重量百分含量计，包括如下组分：Al 7.0-8.6％、RE 0.8-2.0％、Mn 0.2-0.8％，余量为Mg，该镁合金的延伸率为15-22％。Technical solution: 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%.
可选的，该Mg-Al系镁合金的延伸率为17～21.6％。Optionally, the elongation of the Mg-Al-based magnesium alloy is 17-21.6%.
可选的，该Mg-Al系镁合金的焊接损失率小于6％。Optionally, the welding loss rate of the Mg-Al-based magnesium alloy is less than 6%.
可选的，该Mg-Al系镁合金的屈服强度为182～235MPa，抗拉强度为306～342MPa。Optionally, the yield strength of the Mg-Al-based magnesium alloy is 182-235 MPa, and the tensile strength is 306-342 MPa.
作为优选的，该Mg-Al系镁合金中Al的重量百分含量为7.0-8.2％，RE的重量百分含量为1.1-2.0％，Mn的重量百分含量为0.4-0.8％。上述参数范围的镁合金能获得更低的焊接损失率(低于5.5％)、更高的延伸率及更高的强度。Preferably, 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%, and 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.
进一步优选的，该Mg-Al系镁合金中Al的重量百分含量为7.8-8.2％，RE中重量百分含量为1.3-1.9％，Mn的重量百分含量为0.5-0.8％；且RE中Y的重量百分含量为0.8-1.6％，Ce的质量百分含量为0-0.8％。此时，所得镁合金的延伸率为17.4-21.6％，焊接损失率小于5％，且屈服强度达220～235MPa，抗拉强度达320～342MPa。Further preferably, 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%, and the weight percentage of Mn is 0.5-0.8%; and RE The weight percentage of Y is 0.8-1.6%, and the mass percentage of Ce is 0-0.8%. At this time, 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.
更进一步优选的，该Mg-Al系镁合金中Al的重量百分含量为7.8-8.2％，RE中重量百分含量为1.5-1.9％，Mn的重量百分含量为0.5-0.8％；且RE中Y的重量百分含量为0.8％，Ce的质量百分含量为0.5-0.8％。此时，所得镁合金的焊接损失率小于等于4.3％。More preferably, 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%, and the weight percentage of Mn is 0.5-0.8%; and The weight percentage of Y in RE is 0.8%, and the mass percentage of Ce is 0.5-0.8%. At this time, the welding loss rate of the obtained magnesium alloy was 4.3% or less.
可选的，上述镁合金中，RE包括La、Ce、Nd、Y、Gd、Ho、Dy和Er中的至少一种。RE以Y和Ce为主，其他稀土元素微量。Optionally, in the above magnesium alloy, 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.
本发明所述的一种Mg-Al系镁合金管材的制备方法，包括如下步骤：The preparation method of a Mg-Al series magnesium alloy pipe according to the present invention comprises the following steps:
按照元素重百分含量为Al 7.0-8.6％、RE 0.8-2.0％、Mn 0.2-0.8％、Mg余量，将Al源、RE源、Mn源和Mg源混合熔炼成液态混合金属；According to the element weight percentage content of Al 7.0-8.6%, RE 0.8-2.0%, Mn 0.2-0.8%, and Mg balance, the Al source, RE source, Mn source and Mg source are mixed and smelted into a liquid mixed metal;
将液态混合金属半连续铸造成棒材；Semi-continuous casting of liquid mixed metal into bars;
将棒材在360-400℃下均匀化热处理6-10h；Homogenize heat treatment for 6-10h at 360-400℃;
将热处理后的棒材挤压成型，得到镁合金管材。The heat-treated bar is extruded to obtain a magnesium alloy tube.
本发明所述的Mg-Al系镁合金的应用，是将该Mg-Al系镁合金用于车辆设备和医疗器械领域。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.
有益效果：与现有技术相比，本发明的优点为：本发明的Mg-Al系镁合金具备高的延伸率，其成型的管材延伸率可以达到15-22％，使得所述镁合金可以承受较大的塑性变形；同时，该Mg-Al系镁合金的焊接损失率很低，低于6％，大大减小了镁合金型材在焊接后强度的损失，保证了镁合金型材在焊接后的强度；另外，本发明的Mg-Al系镁合金还具备较高的强度，屈服强度达182～232MPa，抗拉强度达306～340MPa。Beneficial effects: Compared with the prior art, 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. In addition, 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.
附图说明Description of drawings
图1为本发明的Mg-Al系镁合金的一种制备工艺流程图。FIG. 1 is a flow chart of a preparation process of the Mg-Al system magnesium alloy of the present invention.
具体实施方式Detailed ways
下面结合附图和实施例对本发明的技术方案作进一步说明。The technical solutions of the present invention will be further described below with reference to the accompanying drawings and embodiments.
本发明的一种Mg-Al系镁合金，按重量百分含量计，包括如下组分：Al 7.0-8.6％、RE 0.8-2.0％、Mn 0.2-0.8％，余量为Mg。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.
具体地，本发明的镁合金是在一定配比的Mg-Al系列合金中添加RE(稀土元素)和Mn，从而提升镁合金的塑性、强度和减小合金的焊接损失率。Specifically, in 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的添加可以去除半连续铸造时引入的杂质元素Fe元素，对焊接性能和力学性能有益，从而减小焊接损失率；同时Mn在镁中不形成化合物，可作为异质形核质点，细化晶粒，在挤压为管材时，促进动态再结晶，细化晶粒且弱化织构，提升强度和塑性。The addition of 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.
RE的添加可以细化镁合金的晶粒尺寸，改善镁合金β强化相的形貌，提升镁合金的强度和塑性。镁合金的强度可以通过屈服强度和拉伸强度体现，本发明提供的Mg-Al系镁合金在成型为管材后，管材的屈服强度范围为182-235MPa，优选地，该管材的屈服强度范围为220-235MPa；同时，该Mg-Al系镁合金管材的抗拉强度范围为306-342MPa，优选为320-340MPa。延伸率与镁合金的塑性直接相关，本发明提供的Mg-Al系镁合金成型为管材后，管材延伸率可以达到15-22％，优选地，该Mg-Al系镁合金管材的延伸率为17～21.6％；高的延伸率使得镁合金可以承受较大的塑性变形，提高所述镁合金的适用范围。The addition of RE can refine the grain size of magnesium alloys, improve the morphology of the β-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. After the Mg-Al magnesium alloy provided by the present invention is formed into a pipe, 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. After the Mg-Al magnesium alloy provided by the present invention is formed into a pipe, the elongation of the pipe can reach 15-22%. Preferably, 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.
焊接强度损失率为镁合金型材在焊接后，焊接试样相比于原始型材试样的强度损失率。本发明的提供的Mg-Al系镁合金的焊接强度损失率小于6％，优选地，焊接强度损失率小于5％，更优选的，焊接强度损失率小于4.3％。本发明实施例提供的镁合金由于RE元素的加入，在高温焊接时形成Al-RE高温稳定相，该高温稳定相钉扎在晶界，阻碍了焊接过程中镁合金晶粒的长大；而且RE元素可以大幅度细化镁合金中β强化相的尺寸，同时避免高温焊接过程中β强化相的长大，从而减小了镁合金型材在焊接后强度的损失，保证了镁合金型材在焊接后的强度。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%. In the magnesium alloy provided by the embodiment of the present invention, due to the addition of RE element, Al-RE high temperature stable phase is formed during high temperature welding, and the high temperature stable phase is pinned at the grain boundary, which hinders the growth of magnesium alloy grains during the welding process; and RE element can greatly refine the size of β-strengthening phase in magnesium alloys, and at the same time avoid the growth of β-strengthening phase during high-temperature welding, thereby reducing the loss of strength of magnesium alloy profiles after welding, and ensuring that magnesium alloy profiles are welded during welding. strength after.
可选地，本发明的Mg-Al系镁合金中Al的重量百分比范围为7.0-8.6％，优选地，该Mg-Al系镁合金中Al的重量百分比范围为7.0-8.2％；更优选的，Al的重量百分比范围为7.8-8.2％。Optionally, 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%.
具体地，该Mg-Al系镁合金中Al的重量百分比控制在一定范围时，Al元素和Mg元素组合具有第二相强化作用，在镁合金成型过程中，可以获得最佳状态(适中的体积分数、形态及尺寸)的β强化相，从而提高镁合金的强度。同时镁基体中固溶部分的Al元素，可以起到固溶强化以及改善塑性的作用。当该Mg-Al系镁合金中Al的重量百分比过高时，比如所述镁合金中Al的重量百分比大于8.6％时，由于粗大的共晶β相析出，一方面在焊接后，弱化了析出相与基体的界面结合能力，在基体及β相的界面易于形成显微孔洞，增加焊接损失率，另一方面粗大的β相在服役过程中会造成应力集中，塑性失稳提前发生，，同时延伸率降低。而所述镁合金中Al的重量百分比过低时，比如小于7％时，由于晶内的Al元素减少，不利于提升塑性，同时析出相数量较少且晶粒细化程度降低，难以起到第二相强化的作用，不利于镁合金强度的提高；另外，含有较少析出相的合金经焊接后，晶粒长大更为明显，因此会造成焊接损失率的增加。Specifically, when 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 β-strengthening phase, thereby improving the strength of magnesium alloys. At the same time, the Al element in the solid solution part of the magnesium matrix can play a role in solid solution strengthening and improving plasticity. When 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 β 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 β phase, which increases the welding loss rate. Elongation decreased. However, when 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.
可选地，本发明的Mg-Al系镁合金中RE的重量百分比范围为0.8-2.0％，优选地，该Mg-Al系镁合金中RE的重量百分比范围为1.1-2.0％，更优选的，RE的重量百分比范围为1.3-1.9％。具体地，该Mg-Al系镁合金中添加RE后，RE元素具有独特的电子排布结构和化学特征，在镁合金中加入适量的稀土元素可增强原子间结合力、减少镁原子扩散速度、提高镁合金的再结晶温度，减缓再结晶长大速度，能显著提高其成形性与耐蚀性；而且RE一般分布于晶界，可以细化镁合金的晶粒尺寸，提升镁合金各晶粒之间的协调能力，RE在镁合金成型过程中还可以形成热稳定的β强化相，提升镁合金的强度和塑性。Optionally, 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%. Specifically, 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 β-strengthening phase during the forming process of magnesium alloys, which improves the strength and plasticity of magnesium alloys.
RE可以包括La、Ce、Nd、Y、Gd、Ho、Dy和Er中的至少一种。具体地，本发明的Mg-Al系镁合金中RE元素以Y和Ce为主，Y的重量百分比范围为0.8-1.6％，Ce的重量百分比范围为0-0.8％。RE may include at least one of La, Ce, Nd, Y, Gd, Ho, Dy, and Er. Specifically, 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%.
如图1，本发明提供了一种Mg-Al系镁合金的制备方法，包括如下步骤：As shown in Figure 1, the present invention provides a preparation method of Mg-Al series magnesium alloy, comprising the following steps:
S101，按照元素重量百分含量为Al 7.0-8.6％、RE 0.8-2.0％、Mn 0.2-0.8％、Mg余量，将Al源、RE源、Mn源和Mg源混合后熔炼成液态混合金属；S101, according to the element weight percentage content of Al 7.0-8.6%, RE 0.8-2.0%, Mn 0.2-0.8%, Mg balance, the Al source, RE source, Mn source and Mg source are mixed and smelted into a liquid mixed metal ;
S102，将液态混合金属铸造成铸锭；S102, casting the liquid mixed metal into an ingot;
S103，将铸锭在第一温度下均匀化热处理；S103, the ingot is homogenized and heat treated at the first temperature;
S104，将热处理后的铸锭挤压成型，得到本发明的Mg-Al系镁合金。S104, extruding the heat-treated ingot to obtain the Mg-Al-based magnesium alloy of the present invention.
具体地，S102中铸造工艺可以通过半连续铸造工艺来实现，采用半连续工艺，因快速水冷，获得的晶粒尺寸较小，细小晶粒可同时提升合金强度和延伸率。S103中，第一温度范围为360-400℃，热处理时间为6-10h，采用挤压前的热处理工艺可以增加基体内Al元素的含量，增加滑移系，提升合金延伸率。Specifically, the casting process in S102 can be realized by a semi-continuous casting process. Using 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. In S103, the first temperature range is 360-400°C, and 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.
当制备Mg-Al系镁合金管材时，步骤S102中，铸锭为棒材，即将液态混合金属铸造成棒材；步骤S104中，将热处理后的棒材反挤压成型，即可得到Mg-Al系镁合金管材。反挤压成型的工艺参数包括挤压温度、挤压比和挤压速度，其中，挤压温度范围为280～330℃，挤压比为49∶1，挤压速度的范围为8-15mm/s。When preparing a Mg-Al magnesium alloy pipe, in 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.
以下以制备Mg-Al系镁合金管材为例，通过具体实施例和对比例对本发明提供的 镁合金进行详细说明。通过本发明实施例提供的制备方法获得的镁合金管材的延伸率较大，可以承受较大的塑性变形，且该镁合金管材具有较低的焊接损失率，这些性能提高了镁合金的适用范围；同时，该镁合金具有较高的屈服强度和拉伸强度。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.
实施例1Example 1
Mg-Al系镁合金包括：Al 7g，Y 0.8g，Mn 0.5g，Mg 91.7g。Mg-Al magnesium alloys include: Al 7g, Y 0.8g, Mn 0.5g, Mg 91.7g.
该Mg-Al系镁合金通过以下制备方法获得，具体包括：The Mg-Al series magnesium alloy is obtained by the following preparation method, which specifically includes:
S101，将Al源、Y源、Mn源和Mg源混合均匀，熔炼成液态混合金属；S101, uniformly mixing the Al source, the Y source, the Mn source and the Mg source, and smelting into a liquid mixed metal;
S102，将液态混合金属通过半连续铸造工艺铸造成棒材；S102, casting the liquid mixed metal into a bar through a semi-continuous casting process;
S103，将棒材在400℃条件下进行热处理，处理时间为8h；S103, heat treatment of the bar at 400°C for 8h;
S104，将热处理后的棒材以12mm/s的速度反挤压成型，得到镁合金管材，挤压温度为300℃，挤压比为49∶1。S104, 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.
实施例2Example 2
Mg-Al系镁合金包括：Al 7.4g，Y 0.8g，Mn 0.5g，Mg 91.3g。Mg-Al series magnesium alloys include: Al 7.4g, Y 0.8g, Mn 0.5g, Mg 91.3g.
该Mg-Al系镁合金通过以下制备方法获得，具体包括：The Mg-Al series magnesium alloy is obtained by the following preparation method, which specifically includes:
S101，将Al源、Y源、Mn源和Mg源混合均匀，熔炼成液态混合金属；S101, uniformly mixing the Al source, the Y source, the Mn source and the Mg source, and smelting into a liquid mixed metal;
S102，将液态混合金属通过半连续铸造工艺铸造成棒材；S102, casting the liquid mixed metal into a bar through a semi-continuous casting process;
S103，将棒材在360℃条件下进行热处理，处理时间为10h；S103, heat treatment of the bar at 360°C for 10h;
S104，将热处理后的棒材以8mm/s的速度反挤压成型，得到镁合金管材，挤压温度为280℃，挤压比为49∶1。S104, 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.
实施例3Example 3
Mg-Al系镁合金包括：Al 7.8g，Y 0.8g，Mn 0.5g，Mg 91.9g。Mg-Al magnesium alloys include: Al 7.8g, Y 0.8g, Mn 0.5g, Mg 91.9g.
该Mg-Al系镁合金通过以下制备方法获得，具体包括：The Mg-Al series magnesium alloy is obtained by the following preparation method, which specifically includes:
S101，将Al源、Y源、Mn源和Mg源混合均匀，熔炼成液态混合金属；S101, uniformly mixing the Al source, the Y source, the Mn source and the Mg source, and smelting into a liquid mixed metal;
S102，将液态混合金属通过半连续铸造工艺铸造成棒材；S102, casting the liquid mixed metal into a bar through a semi-continuous casting process;
S103，将棒材在400℃条件下进行热处理，处理时间为8h；S103, heat treatment of the bar at 400°C for 8h;
S104，将热处理后的棒材以12mm/s的速度反挤压成型，得到镁合金管材，挤压温度为300℃，挤压比为49∶1。S104, 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.
实施例4Example 4
Mg-Al系镁合金包括：Al 8.2g，Y 0.8g，Mn 0.5g，Mg 90.5g。Mg-Al magnesium alloys include: Al 8.2g, Y 0.8g, Mn 0.5g, Mg 90.5g.
该Mg-Al系镁合金通过以下制备方法获得，具体包括：The Mg-Al series magnesium alloy is obtained by the following preparation method, which specifically includes:
S101，将Al源、Y源、Mn源和Mg源混合均匀，熔炼成液态混合金属；S101, uniformly mixing the Al source, the Y source, the Mn source and the Mg source, and smelting into a liquid mixed metal;
S102，将液态混合金属通过半连续铸造工艺铸造成棒材；S102, casting the liquid mixed metal into a bar through a semi-continuous casting process;
S103，将棒材在380℃条件下进行热处理，处理时间为6h；S103, heat treatment of the bar at 380°C for 6h;
S104，将热处理后的棒材以10mm/s的速度反挤压成型，得到镁合金管材，挤压温度为330℃，挤压比为49∶1。S104, 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.
实施例5Example 5
Mg-Al系镁合金包括：Al 8.6g，Y 0.8g，Mn 0.5g，Mg 90.1g。Mg-Al magnesium alloys include: Al 8.6g, Y 0.8g, Mn 0.5g, Mg 90.1g.
该Mg-Al系镁合金通过以下制备方法获得，具体包括：The Mg-Al series magnesium alloy is obtained by the following preparation method, which specifically includes:
S101，将Al源、Y源、Mn源和Mg源混合均匀，熔炼成液态混合金属；S101, uniformly mixing the Al source, the Y source, the Mn source and the Mg source, and smelting into a liquid mixed metal;
S102，将液态混合金属通过半连续铸造工艺铸造成棒材；S102, casting the liquid mixed metal into a bar through a semi-continuous casting process;
S103，将棒材在400℃条件下进行热处理，处理时间为8h；S103, heat treatment of the bar at 400°C for 8h;
S104，将热处理后的棒材以12mm/s的速度反挤压成型，得到镁合金管材，挤压温度为300℃，挤压比为49∶1。S104, 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.
实施例6Example 6
Mg-Al系镁合金包括：Al 7.8g，Y 1.2g，Mn 0.5g，Mg 90.5g。Mg-Al magnesium alloys include: Al 7.8g, Y 1.2g, Mn 0.5g, Mg 90.5g.
该Mg-Al系镁合金通过以下制备方法获得，具体包括：The Mg-Al series magnesium alloy is obtained by the following preparation method, which specifically includes:
S101，将Al源、Y源、Mn源和Mg源混合均匀，熔炼成液态混合金属；S101, uniformly mixing the Al source, the Y source, the Mn source and the Mg source, and smelting into a liquid mixed metal;
S102，将液态混合金属通过半连续铸造工艺铸造成棒材；S102, casting the liquid mixed metal into a bar through a semi-continuous casting process;
S103，将棒材在400℃条件下进行热处理，处理时间为8h；S103, heat treatment of the bar at 400°C for 8h;
S104，将热处理后的棒材以12mm/s的速度反挤压成型，得到镁合金管材，挤压温度为300℃，挤压比为49∶1。S104, 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.
实施例7Example 7
Mg-Al系镁合金包括：Al 7.8g，Y 1.6g，Mn 0.5g，Mg 90.1g。Mg-Al magnesium alloys include: Al 7.8g, Y 1.6g, Mn 0.5g, Mg 90.1g.
该Mg-Al系镁合金通过以下制备方法获得，具体包括：The Mg-Al series magnesium alloy is obtained by the following preparation method, which specifically includes:
S101，将Al源、Y源、Mn源和Mg源混合均匀，熔炼成液态混合金属；S101, uniformly mixing the Al source, the Y source, the Mn source and the Mg source, and smelting into a liquid mixed metal;
S102，将液态混合金属通过半连续铸造工艺铸造成棒材；S102, casting the liquid mixed metal into a bar through a semi-continuous casting process;
S103，将棒材在400℃条件下进行热处理，处理时间为8h；S103, heat treatment of the bar at 400°C for 8h;
S104，将热处理后的棒材以12mm/s的速度反挤压成型，得到镁合金管材，挤压温度为300℃，挤压比为49∶1。S104, 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.
实施例8Example 8
Mg-Al系镁合金包括：Al 7.8g，Y 0.8g、Ce 0.3g(RE 1.1％)，Mn 0.5g，Mg 90.6g。Mg-Al magnesium alloys include: Al 7.8g, Y 0.8g, Ce 0.3g (RE 1.1%), Mn 0.5g, Mg 90.6g.
该Mg-Al系镁合金通过以下制备方法获得，具体包括：The Mg-Al series magnesium alloy is obtained by the following preparation method, which specifically includes:
S101，将Al源、Y源、Mn源和Mg源混合均匀，熔炼成液态混合金属；S101, uniformly mixing the Al source, the Y source, the Mn source and the Mg source, and smelting into a liquid mixed metal;
S102，将液态混合金属通过半连续铸造工艺铸造成棒材；S102, casting the liquid mixed metal into a bar through a semi-continuous casting process;
S103，将棒材在400℃条件下进行热处理，处理时间为8h；S103, heat treatment of the bar at 400°C for 8h;
S104，将热处理后的棒材以12mm/s的速度反挤压成型，得到镁合金管材，挤压温度为300℃，挤压比为49∶1。S104, 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.
实施例9Example 9
Mg-Al系镁合金包括：Al 7.8g，Y 1.2g、Ce 0.3g(RE 1.5％)，Mn 0.5g，Mg 90.2g。Mg-Al magnesium alloys include: Al 7.8g, Y 1.2g, Ce 0.3g (RE 1.5%), Mn 0.5g, Mg 90.2g.
该Mg-Al系镁合金通过以下制备方法获得，具体包括：The Mg-Al series magnesium alloy is obtained by the following preparation method, which specifically includes:
S101，将Al源、Y源、Mn源和Mg源混合均匀，熔炼成液态混合金属；S101, uniformly mixing the Al source, the Y source, the Mn source and the Mg source, and smelting into a liquid mixed metal;
S102，将液态混合金属通过半连续铸造工艺铸造成棒材；S102, casting the liquid mixed metal into a bar through a semi-continuous casting process;
S103，将棒材在400℃条件下进行热处理，处理时间为8h；S103, heat treatment of the bar at 400°C for 8h;
S104，将热处理后的棒材以12mm/s的速度反挤压成型，得到镁合金管材，挤压温度为300℃，挤压比为49∶1。S104, 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.
实施例10Example 10
Mg-Al系镁合金包括：Al 7.8g，Y 0.8g、Ce 0.5g(RE 1.3％)，Mn 0.5g，Mg 90.4g。Mg-Al magnesium alloys include: Al 7.8g, Y 0.8g, Ce 0.5g (RE 1.3%), Mn 0.5g, Mg 90.4g.
该Mg-Al系镁合金通过以下制备方法获得，具体包括：The Mg-Al series magnesium alloy is obtained by the following preparation method, which specifically includes:
S101，将Al源、Y源、Mn源和Mg源混合均匀，熔炼成液态混合金属；S101, uniformly mixing the Al source, the Y source, the Mn source and the Mg source, and smelting into a liquid mixed metal;
S102，将液态混合金属通过半连续铸造工艺铸造成棒材；S102, casting the liquid mixed metal into a bar through a semi-continuous casting process;
S103，将棒材在400℃条件下进行热处理，处理时间为8h；S103, heat treatment of the bar at 400°C for 8h;
S104，将热处理后的棒材以12mm/s的速度反挤压成型，得到镁合金管材，挤压温度为300℃，挤压比为49∶1。S104, 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.
实施例11Example 11
Mg-Al系镁合金包括：Al 7.8g，Y 0.8g、Ce 0.8g(RE 1.6％)，Mn 0.5g，Mg 90.1g。Mg-Al magnesium alloys include: Al 7.8g, Y 0.8g, Ce 0.8g (RE 1.6%), Mn 0.5g, Mg 90.1g.
该Mg-Al系镁合金通过以下制备方法获得，具体包括：The Mg-Al series magnesium alloy is obtained by the following preparation method, which specifically includes:
S101，将Al源、Y源、Mn源和Mg源混合均匀，熔炼成液态混合金属；S101, uniformly mixing the Al source, the Y source, the Mn source and the Mg source, and smelting into a liquid mixed metal;
S102，将液态混合金属通过半连续铸造工艺铸造成棒材；S102, casting the liquid mixed metal into a bar through a semi-continuous casting process;
S103，将棒材在400℃条件下进行热处理，处理时间为8h；S103, heat treatment of the bar at 400°C for 8h;
S104，将热处理后的棒材以12mm/s的速度反挤压成型，得到镁合金管材，挤压温度为300℃，挤压比为49∶1。S104, 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.
实施例12Example 12
Mg-Al系镁合金包括：Al 7.8g，Y 0.8g、Ce 0.5g、La 0.1g(RE 1.4％)，Mn 0.5g，Mg 90.3g。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.
该Mg-Al系镁合金通过以下制备方法获得，具体包括：The Mg-Al series magnesium alloy is obtained by the following preparation method, which specifically includes:
S101，将Al源、Y源、Mn源和Mg源混合均匀，熔炼成液态混合金属；S101, uniformly mixing the Al source, the Y source, the Mn source and the Mg source, and smelting into a liquid mixed metal;
S102，将液态混合金属通过半连续铸造工艺铸造成棒材；S102, casting the liquid mixed metal into a bar through a semi-continuous casting process;
S103，将棒材在400℃条件下进行热处理，处理时间为8h；S103, heat treatment of the bar at 400°C for 8h;
S104，将热处理后的棒材以12mm/s的速度反挤压成型，得到镁合金管材，挤压温度为300℃，挤压比为49∶1。S104, 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.
实施例13Example 13
Mg-Al系镁合金包括：Al 7.8g，Y 0.8g、Ce 0.5g、La 0.1g、Nd 0.1g(RE 1.5％)，Mn 0.5g，Mg 90.2g。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.
该Mg-Al系镁合金通过以下制备方法获得，具体包括：The Mg-Al series magnesium alloy is obtained by the following preparation method, which specifically includes:
S101，将Al源、Y源、Mn源和Mg源混合均匀，熔炼成液态混合金属；S101, uniformly mixing the Al source, the Y source, the Mn source and the Mg source, and smelting into a liquid mixed metal;
S102，将液态混合金属通过半连续铸造工艺铸造成棒材；S102, casting the liquid mixed metal into a bar through a semi-continuous casting process;
S103，将棒材在400℃条件下进行热处理，处理时间为8h；S103, heat treatment of the bar at 400°C for 8h;
S104，将热处理后的棒材以12mm/s的速度反挤压成型，得到镁合金管材，挤压温度为300℃，挤压比为49∶1。S104, 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.
实施例14Example 14
Mg-Al系镁合金包括：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。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.
该Mg-Al系镁合金通过以下制备方法获得，具体包括：The Mg-Al series magnesium alloy is obtained by the following preparation method, which specifically includes:
S101，将Al源、Y源、Mn源和Mg源混合均匀，熔炼成液态混合金属；S101, uniformly mixing the Al source, the Y source, the Mn source and the Mg source, and smelting into a liquid mixed metal;
S102，将液态混合金属通过半连续铸造工艺铸造成棒材；S102, casting the liquid mixed metal into a bar through a semi-continuous casting process;
S103，将棒材在400℃条件下进行热处理，处理时间为8h；S103, heat treatment of the bar at 400°C for 8h;
S104，将热处理后的棒材以12mm/s的速度反挤压成型，得到镁合金管材，挤压温度 为300℃，挤压比为49∶1。S104, 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.
实施例15Example 15
Mg-Al系镁合金包括：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。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.
该Mg-Al系镁合金通过以下制备方法获得，具体包括：The Mg-Al series magnesium alloy is obtained by the following preparation method, which specifically includes:
S101，将Al源、Y源、Mn源和Mg源混合均匀，熔炼成液态混合金属；S101, uniformly mixing the Al source, the Y source, the Mn source and the Mg source, and smelting into a liquid mixed metal;
S102，将液态混合金属通过半连续铸造工艺铸造成棒材；S102, casting the liquid mixed metal into a bar through a semi-continuous casting process;
S103，将棒材在400℃条件下进行热处理，处理时间为8h；S103, heat treatment of the bar at 400°C for 8h;
S104，将热处理后的棒材以12mm/s的速度反挤压成型，得到镁合金管材，挤压温度为300℃，挤压比为49∶1。S104, 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.
实施例16Example 16
Mg-Al系镁合金包括：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。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.
该Mg-Al系镁合金通过以下制备方法获得，具体包括：The Mg-Al series magnesium alloy is obtained by the following preparation method, which specifically includes:
S101，将Al源、Y源、Mn源和Mg源混合均匀，熔炼成液态混合金属；S101, uniformly mixing the Al source, the Y source, the Mn source and the Mg source, and smelting into a liquid mixed metal;
S102，将液态混合金属通过半连续铸造工艺铸造成棒材；S102, casting the liquid mixed metal into a bar through a semi-continuous casting process;
S103，将棒材在400℃条件下进行热处理，处理时间为8h；S103, heat treatment of the bar at 400°C for 8h;
S104，将热处理后的棒材以12mm/s的速度反挤压成型，得到镁合金管材，挤压温度为300℃，挤压比为49∶1。S104, 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.
实施例17Example 17
Mg-Al系镁合金包括：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。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.
该Mg-Al系镁合金通过以下制备方法获得，具体包括：The Mg-Al series magnesium alloy is obtained by the following preparation method, which specifically includes:
S101，将Al源、Y源、Mn源和Mg源混合均匀，熔炼成液态混合金属；S101, uniformly mixing the Al source, the Y source, the Mn source and the Mg source, and smelting into a liquid mixed metal;
S102，将液态混合金属通过半连续铸造工艺铸造成棒材；S102, casting the liquid mixed metal into a bar through a semi-continuous casting process;
S103，将棒材在400℃条件下进行热处理，处理时间为8h；S103, heat treatment of the bar at 400°C for 8h;
S104，将热处理后的棒材以12mm/s的速度反挤压成型，得到镁合金管材，挤压温度为300℃，挤压比为49∶1。S104, 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.
实施例18Example 18
Mg-Al系镁合金包括：Al 8.0g，Y 0.8g、Ce 0.5g(RE 1.3％)，Mn 0.5g，Mg 90.4g。Mg-Al magnesium alloys include: Al 8.0g, Y 0.8g, Ce 0.5g (RE 1.3%), Mn 0.5g, Mg 90.4g.
该Mg-Al系镁合金通过以下制备方法获得，具体包括：The Mg-Al series magnesium alloy is obtained by the following preparation method, which specifically includes:
S101，将Al源、Y源、Mn源和Mg源混合均匀，熔炼成液态混合金属；S101, uniformly mixing the Al source, the Y source, the Mn source and the Mg source, and smelting into a liquid mixed metal;
S102，将液态混合金属通过半连续铸造工艺铸造成棒材；S102, casting the liquid mixed metal into a bar through a semi-continuous casting process;
S103，将棒材在400℃条件下进行热处理，处理时间为8h；S103, heat treatment of the bar at 400°C for 8h;
S104，将热处理后的棒材以12mm/s的速度反挤压成型，得到镁合金管材，挤压温度为300℃，挤压比为49∶1。S104, 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.
实施例19Example 19
Mg-Al系镁合金包括：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。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.
该Mg-Al系镁合金通过以下制备方法获得，具体包括：The Mg-Al series magnesium alloy is obtained by the following preparation method, which specifically includes:
S101，将Al源、Y源、Mn源和Mg源混合均匀，熔炼成液态混合金属；S101, uniformly mixing the Al source, the Y source, the Mn source and the Mg source, and smelting into a liquid mixed metal;
S102，将液态混合金属通过半连续铸造工艺铸造成棒材；S102, casting the liquid mixed metal into a bar through a semi-continuous casting process;
S103，将棒材在400℃条件下进行热处理，处理时间为8h；S103, heat treatment of the bar at 400°C for 8h;
S104，将热处理后的棒材以12mm/s的速度反挤压成型，得到镁合金管材，挤压温度为300℃，挤压比为49∶1。S104, 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.
实施例20Example 20
Mg-Al系镁合金包括：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。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.
该Mg-Al系镁合金通过以下制备方法获得，具体包括：The Mg-Al series magnesium alloy is obtained by the following preparation method, which specifically includes:
S101，将Al源、Y源、Mn源和Mg源混合均匀，熔炼成液态混合金属；S101, uniformly mixing the Al source, the Y source, the Mn source and the Mg source, and smelting into a liquid mixed metal;
S102，将液态混合金属通过半连续铸造工艺铸造成棒材；S102, casting the liquid mixed metal into a bar through a semi-continuous casting process;
S103，将棒材在400℃条件下进行热处理，处理时间为8h；S103, heat treatment of the bar at 400°C for 8h;
S104，将热处理后的棒材以12mm/s的速度反挤压成型，得到镁合金管材，挤压温度为300℃，挤压比为49∶1。S104, 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.
实施例21Example 21
Mg-Al系镁合金包括：Al 7.8g，Y 0.8g、Ce 0.5g(RE 1.3％)，Mn 0.2g，Mg 90.7g。Mg-Al magnesium alloys include: Al 7.8g, Y 0.8g, Ce 0.5g (RE 1.3%), Mn 0.2g, Mg 90.7g.
该Mg-Al系镁合金通过以下制备方法获得，具体包括：The Mg-Al series magnesium alloy is obtained by the following preparation method, which specifically includes:
S101，将Al源、Y源、Mn源和Mg源混合均匀，熔炼成液态混合金属；S101, uniformly mixing the Al source, the Y source, the Mn source and the Mg source, and smelting into a liquid mixed metal;
S102，将液态混合金属通过半连续铸造工艺铸造成棒材；S102, casting the liquid mixed metal into a bar through a semi-continuous casting process;
S103，将棒材在400℃条件下进行热处理，处理时间为8h；S103, heat treatment of the bar at 400°C for 8h;
S104，将热处理后的棒材以12mm/s的速度反挤压成型，得到镁合金管材，挤压温度为300℃，挤压比为49∶1。S104, 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.
实施例22Example 22
Mg-Al系镁合金包括：Al 7.8g，Y 0.8g、Ce 0.5g(RE 1.3％)，Mn 0.4g，Mg 90.5g。Mg-Al magnesium alloys include: Al 7.8g, Y 0.8g, Ce 0.5g (RE 1.3%), Mn 0.4g, Mg 90.5g.
该Mg-Al系镁合金通过以下制备方法获得，具体包括：The Mg-Al series magnesium alloy is obtained by the following preparation method, which specifically includes:
S101，将Al源、Y源、Mn源和Mg源混合均匀，熔炼成液态混合金属；S101, uniformly mixing the Al source, the Y source, the Mn source and the Mg source, and smelting into a liquid mixed metal;
S102，将液态混合金属通过半连续铸造工艺铸造成棒材；S102, casting the liquid mixed metal into a bar through a semi-continuous casting process;
S103，将棒材在400℃条件下进行热处理，处理时间为8h；S103, heat treatment of the bar at 400°C for 8h;
S104，将热处理后的棒材以12mm/s的速度反挤压成型，得到镁合金管材，挤压温度为300℃，挤压比为49∶1。S104, 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.
实施例23Example 23
Mg-Al系镁合金包括：Al 7.8g，Y 0.8g、Ce 0.5g(RE 1.3％)，Mn 0.8g，Mg 90.1g。Mg-Al magnesium alloys include: Al 7.8g, Y 0.8g, Ce 0.5g (RE 1.3%), Mn 0.8g, Mg 90.1g.
该Mg-Al系镁合金通过以下制备方法获得，具体包括：The Mg-Al series magnesium alloy is obtained by the following preparation method, which specifically includes:
S101，将Al源、Y源、Mn源和Mg源混合均匀，熔炼成液态混合金属；S101, uniformly mixing the Al source, the Y source, the Mn source and the Mg source, and smelting into a liquid mixed metal;
S102，将液态混合金属通过半连续铸造工艺铸造成棒材；S102, casting the liquid mixed metal into a bar through a semi-continuous casting process;
S103，将棒材在400℃条件下进行热处理，处理时间为8h；S103, heat treatment of the bar at 400°C for 8h;
S104，将热处理后的棒材以12mm/s的速度反挤压成型，得到镁合金管材，挤压温度为300℃，挤压比为49∶1。S104, 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.
对比例1Comparative Example 1
Mg-Al系镁合金包括：Al 6.5g，Y 0.8g，Mn 0.5g，Mg 92.2g。Mg-Al magnesium alloys include: Al 6.5g, Y 0.8g, Mn 0.5g, Mg 92.2g.
该Mg-Al系镁合金通过以下制备方法获得，具体包括：The Mg-Al series magnesium alloy is obtained by the following preparation method, which specifically includes:
S101，将Al源、Y源、Mn源和Mg源混合均匀，熔炼成液态混合金属；S101, uniformly mixing the Al source, the Y source, the Mn source and the Mg source, and smelting into a liquid mixed metal;
S102，将液态混合金属通过半连续铸造工艺铸造成棒材；S102, casting the liquid mixed metal into a bar through a semi-continuous casting process;
S103，将棒材在400℃条件下进行热处理，处理时间为8h；S103, heat treatment of the bar at 400°C for 8h;
S104，将热处理后的棒材以12mm/s的速度反挤压成型，得到镁合金管材，挤压温度为300℃，挤压比为49∶1。S104, 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.
对比例2Comparative Example 2
Mg-Al系镁合金包括：Al 9.6g，Y 0.8g，Mn 0.5g，Mg 89.1g。Mg-Al magnesium alloys include: Al 9.6g, Y 0.8g, Mn 0.5g, Mg 89.1g.
该Mg-Al系镁合金通过以下制备方法获得，具体包括：The Mg-Al series magnesium alloy is obtained by the following preparation method, which specifically includes:
S101，将Al源、Y源、Mn源和Mg源混合均匀，熔炼成液态混合金属；S101, mixing the Al source, the Y source, the Mn source and the Mg source uniformly, and smelting into a liquid mixed metal;
S102，将液态混合金属通过半连续铸造工艺铸造成棒材；S102, casting the liquid mixed metal into a bar through a semi-continuous casting process;
S103，将棒材在400℃条件下进行热处理，处理时间为8h；S103, heat treatment of the bar at 400°C for 8h;
S104，将热处理后的棒材以12mm/s的速度反挤压成型，得到镁合金管材，挤压温度为300℃，挤压比为49∶1。S104, 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.
对比例3Comparative Example 3
Mg-Al系镁合金包括：Al 7g，Y 0.5g，Mn 0.5g，Mg 92.0g。Mg-Al magnesium alloys include: Al 7g, Y 0.5g, Mn 0.5g, Mg 92.0g.
该Mg-Al系镁合金通过以下制备方法获得，具体包括：The Mg-Al series magnesium alloy is obtained by the following preparation method, which specifically includes:
S101，将Al源、Y源、Mn源和Mg源混合均匀，熔炼成液态混合金属；S101, mixing the Al source, the Y source, the Mn source and the Mg source uniformly, and smelting into a liquid mixed metal;
S102，将液态混合金属通过半连续铸造工艺铸造成棒材；S102, casting the liquid mixed metal into a bar through a semi-continuous casting process;
S103，将棒材在400℃条件下进行热处理，处理时间为8h；S103, heat treatment of the bar at 400°C for 8h;
S104，将热处理后的棒材以12mm/s的速度反挤压成型，得到镁合金管材，挤压温度为300℃，挤压比为49∶1。S104, 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.
对比例4Comparative Example 4
Mg-Al系镁合金包括：Al 7g，Y 2.3g，Mn 0.5g，Mg 90.2g。Mg-Al series magnesium alloys include: Al 7g, Y 2.3g, Mn 0.5g, Mg 90.2g.
该Mg-Al系镁合金通过以下制备方法获得，具体包括：The Mg-Al series magnesium alloy is obtained by the following preparation method, which specifically includes:
S101，将Al源、Y源、Mn源和Mg源混合均匀，熔炼成液态混合金属；S101, mixing the Al source, the Y source, the Mn source and the Mg source uniformly, and smelting into a liquid mixed metal;
S102，将液态混合金属通过半连续铸造工艺铸造成棒材；S102, casting the liquid mixed metal into a bar through a semi-continuous casting process;
S103，将棒材在400℃条件下进行热处理，处理时间为8h；S103, heat treatment of the bar at 400°C for 8h;
S104，将热处理后的棒材以12mm/s的速度反挤压成型，得到镁合金管材，挤压温度为300℃，挤压比为49∶1.S104, 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.
对比例5Comparative Example 5
Mg-Al系镁合金包括：Al 7g，Y 0.8g，Mg 92.2g。Mg-Al series magnesium alloys include: Al 7g, Y 0.8g, Mg 92.2g.
该Mg-Al系镁合金通过以下制备方法获得，具体包括：The Mg-Al series magnesium alloy is obtained by the following preparation method, which specifically includes:
S101，将Al源、Y源、Mn源和Mg源混合均匀，将混合原料熔炼成液态混合金属；S101, mixing the Al source, the Y source, the Mn source and the Mg source uniformly, and smelting the mixed raw materials into a liquid mixed metal;
S102，将液态混合金属通过半连续铸造工艺铸造成棒材；S102, casting the liquid mixed metal into a bar through a semi-continuous casting process;
S103，将棒材在400℃条件下进行热处理，处理时间为8h；S103, heat treatment of the bar at 400°C for 8h;
S104，将热处理后的棒材以12mm/s的速度反挤压成型，得到镁合金管材，挤压温度 为300℃，挤压比为49∶1。S104, 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.
表1实施例1-20的Mg-Al系镁合金和对比例1-5的镁合金性能参数Table 1 Performance parameters of the Mg-Al magnesium alloys of Examples 1-20 and the magnesium alloys of Comparative Examples 1-5
Figure PCTCN2022071812-appb-000001
Figure PCTCN2022071812-appb-000001
Figure PCTCN2022071812-appb-000002
Figure PCTCN2022071812-appb-000002
从表1中可以看出，实施例1-23的镁合金管材屈服强度均可以达到182MPa以上，实施例19的镁合金管材的屈服强度达到235MPa；抗拉强度均可以达到306MPa以上，实施例19的镁合金管材的抗拉强度达到342MPa；延伸率均大于15％，实施例17的镁合金管材的延伸率达到21.6％；实施例1-23的镁合金管材焊接损失率均小于6％，实施例15-17、实施例19-20及实施例23的镁合金管材焊接损失率为4％以下，并可低至3.5％。As can be seen from Table 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%.
比较实施例1与对比例1～2，对比例1中由于添加的Al含量较低，导致镁合金屈服强度和抗拉强度较低，分别低至165Mpa和287Mpa，且焊接损失率有所增大；对比例2中由于添加的Al含量过高，镁合金塑性变差，延伸率降低至12.7％，同时，焊接损失率明显增大，增加至7.3％。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%.
比较实施例1与对比例3～4，对比例3中由于添加的RE含量过低，导致镁合金的屈服强度和抗拉强度较低，而且塑性也较差，延伸率只有13.9％，同时，焊接损失率增大；对比例4中添加的RE含量过高，虽然镁合金的屈服强度和抗拉强度有所提高，但塑形明显变差，延伸率只有12.8％，且焊接损失率也有所增大。Comparing Example 1 with Comparative Examples 3 to 4, in Comparative Example 3, due to the low content of RE added, the yield strength and tensile strength of the magnesium alloy are low, and the plasticity is also poor, and the elongation is only 13.9%. 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.
比较实施例1与对比例5，对比例5中由于未添加Mn，导致镁合金整体性能下降，其中，延伸率明显降低，且焊接损失率明显增大，超出了6％。Comparing Example 1 with Comparative Example 5, in Comparative Example 5, since no Mn was added, the overall performance of the magnesium alloy decreased, wherein the elongation was significantly reduced, and the welding loss rate was significantly increased, exceeding 6%.
本发明的Mg-Al系镁合金可以应用于车辆设备和医疗器械领域，比如将Mg-Al系镁合金在成型为棒材，多个镁合金棒材焊接后可以作为轮椅、担架、自行车、山地车等设备的承重构件和支撑构件，在减轻上述设备重量的同时，保证了上述设备的强度和稳定性。The Mg-Al series magnesium alloy of the present invention can be applied to the fields of vehicle equipment and medical equipment. For example, 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.

Claims (9)

  1. 一种Mg-Al系镁合金，其特征在于，按重量百分含量计，包括如下组分：Al 7.0-8.6％、RE 0.8-2.0％、Mn 0.2-0.8％，余量为Mg，所述镁合金的延伸率为15-22％。A Mg-Al series magnesium alloy, characterized in that, in terms of weight percentage, it includes the following components: Al 7.0-8.6%, RE 0.8-2.0%, Mn 0.2-0.8%, and the balance is Mg, and the Magnesium alloys have an elongation of 15-22%.
  2. 根据权利要求1所述的Mg-Al系镁合金，其特征在于，所述镁合金中Al的重量百分含量为7.0-8.2％，RE的重量百分含量为1.1-2.0％，Mn的重量百分含量为0.4-0.8％。The Mg-Al based magnesium alloy according to claim 1, wherein the weight percentage of Al in the magnesium alloy is 7.0-8.2%, the weight percentage of RE is 1.1-2.0%, and the weight percentage of Mn is 7.0-8.2%. The percentage content is 0.4-0.8%.
  3. 根据权利要求2所述的Mg-Al系镁合金，其特征在于，所述镁合金中Al的重量百分含量为7.8-8.2％，RE的重量百分含量为1.3-1.9％，Mn的重量百分含量为0.5-0.8％；，所述RE中Y的重量百分含量为0.8-1.6％，Ce的质量百分含量为0-0.8％。The Mg-Al-based magnesium alloy according to claim 2, wherein the weight percentage of Al in the magnesium alloy is 7.8-8.2%, the weight percentage of RE is 1.3-1.9%, and the weight percentage of Mn is 1.3-1.9%. The percentage content is 0.5-0.8%; the weight percentage of Y in the RE is 0.8-1.6%, and the mass percentage of Ce is 0-0.8%.
  4. 根据权利要求1所述的Mg-Al系镁合金，其特征在于，所述镁合金的延伸率为17-21.6％。The Mg-Al-based magnesium alloy according to claim 1, wherein the elongation of the magnesium alloy is 17-21.6%.
  5. 根据权利要求1所述的Mg-Al系镁合金，其特征在于，所述镁合金的焊接损失率小于6％。The Mg-Al-based magnesium alloy according to claim 1, wherein the welding loss rate of the magnesium alloy is less than 6%.
  6. 根据权利要求1所述的Mg-Al系镁合金，其特征在于，所述镁合金的屈服强度为182～235MPa，抗拉强度为306～342MPa。The Mg-Al-based magnesium alloy according to claim 1, wherein the magnesium alloy has a yield strength of 182-235 MPa and a tensile strength of 306-342 MPa.
  7. 根据权利要求1所述的Mg-Al系镁合金，其特征在于，所述RE包括La、Ce、Nd、Y、Gd、Ho、Dy和Er中的至少一种。The Mg-Al-based magnesium alloy according to claim 1, wherein the RE includes at least one of La, Ce, Nd, Y, Gd, Ho, Dy and Er.
  8. 一种Mg-Al系镁合金管材的制备方法，其特征在于，包括如下步骤：A preparation method of a Mg-Al series magnesium alloy pipe is characterized in that, comprising the following steps:
    按照元素重量百分含量Al 7.0-8.6％、RE 0.8-2.0％、Mn 0.2-0.8％、Mg余量，将Al源、RE源、Mn源和Mg源混合熔炼成液态混合金属；According to the element weight percentages of Al 7.0-8.6%, RE 0.8-2.0%, Mn 0.2-0.8%, and Mg balance, the Al source, RE source, Mn source and Mg source are mixed and smelted into a liquid mixed metal;
    将所述液态混合金属半连续铸造成棒材；semi-continuously casting the liquid mixed metal into a bar;
    将所述棒材在360-400℃下均匀化热处理6-10h；Homogenize heat treatment of the bar at 360-400°C for 6-10h;
    将热处理后的棒材反挤压成型，得到所述镁合金管材。The heat-treated bar is back-extruded to obtain the magnesium alloy pipe.
  9. 权利要求1-7任一项所述Mg-Al系镁合金用于车辆设备和医疗器械领域的应用。The application of the Mg-Al-based magnesium alloy described in any one of claims 1 to 7 in the fields of vehicle equipment and medical equipment.
PCT/CN2022/071812 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 WO2022152212A1 (en)

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CN202280009957.5A CN116761905A (en) 2021-01-13 2022-01-13 Mg-Al magnesium alloy and preparation method and application of pipe thereof
JP2023565644A JP2024503546A (en) 2021-01-13 2022-01-13 Mg-Al based magnesium alloy and method for producing its pipe material, and its application
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