Classifications

• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B22—CASTING; POWDER METALLURGY
  • B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
  • B22D21/00—Casting non-ferrous metals or metallic compounds so far as their metallurgical properties are of importance for the casting procedure; Selection of compositions therefor
  • B22D21/002—Castings of light metals
  • B22D21/007—Castings of light metals with low melting point, e.g. Al 659 degrees C, Mg 650 degrees C
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B22—CASTING; POWDER METALLURGY
  • B22C—FOUNDRY MOULDING
  • B22C9/00—Moulds or cores; Moulding processes

Definitions

• the present invention relates to a magnesium alloy mold and a magnesium alloy forging method, and more particularly to a magnesium alloy mold and a magnesium alloy forging method capable of ensuring the fluidity of a molten magnesium alloy.
• Magnesium is the lightest material for practical use, and its specific strength and specific rigidity are superior to those of steel and aluminum, and it also has excellent electromagnetic shielding properties, machinability, rise absorption, dent resistance and recyclability. As a result, the applicable range of magnesium has been expanded.
• magnesium alloys are used as materials for parts for automobiles and portable terminals, and demand is growing rapidly.
• Patent Document 1 Japanese Patent Application Laid-Open No. 2000-0 1 2 9 2 7 2 Disclosure of Invention
• the present invention provides a magnesium alloy mold that can secure the fluidity of the magnesium alloy melt while reducing the manufacturing cost of the forging apparatus and the energy cost generated by heating, and the magnesium alloy forging using the mold.
• the purpose is to provide a method. Means that the Invention is to Solve
• the magnesium alloy saddle according to claim 1 is formed of a breathable material for the mold and Z or the core.
• the breathable material is formed of any one of a net, a plate having a plurality of holes, a cloth, or a combination thereof.
• the mesh body, the plate or the cloth is made of a metal, chemical fiber, ceramics or a combination thereof.
• the net, the board and the cloth have flexibility.
• the method for forging a magnesium alloy according to claim 5 uses a mold in which the mold and the core or the core are made of a breathable material.
• the method of forging a magnesium alloy according to claim 6 includes: a breathable material mold and Z or medium
• the child is composed of a mesh body, a plate having a plurality of holes, a cloth, or a combination thereof.
• the magnesium alloy mold and the Z or core are formed of a gas-permeable material, so that the gap between the molten metal and the magnesium alloy mold. The apparent thermal conductivity coefficient is reduced.
• the molten metal does not harden instantaneously, ensuring the fluidity of the molten metal, and the molten metal spreads throughout the magnesium alloy mold. .
• the breathable material is composed of any one of a net, a plate having a plurality of holes, a cloth, or a combination thereof, a unit of molten magnesium alloy Due to the small latent heat per volume and the influence of surface tension, the molten metal that contacts the magnesium alloy mold is between the meshes. Solidify without flowing out from the weave and between.
• the breathable material is composed of a net, a plate or cloth having a plurality of holes, or a combination of these, a new hole for venting air is newly added to the magnesium alloy saddle. There is no need to provide it.
• the magnesium alloy mold of claim 3 it is possible to select the most suitable net, board or cloth material for fabrication in consideration of the composition of the magnesium alloy, the size and shape of the fabricated product, etc. . According to the magnesium alloy mold of claim 4, the magnesium alloy mold can be easily manufactured by the flexibility of the net, the plate, and the cloth.
• the magnesium alloy saddle mold and the Z or core are formed of a breathable material, so that the gap between the molten metal and the magnesium alloy mold is between The apparent thermal conductivity coefficient is reduced.
• the breathable material is composed of any one of a net body, a plate having a plurality of holes, a cloth, or a combination thereof, per unit volume of the molten magnesium alloy. Due to the small latent heat and surface tension, the magnesium alloy saddle mold and the molten metal solidify without flowing out between the mesh, the holes, the texture and between.
• the breathable material is composed of a net, a plate or cloth having a plurality of holes, or a combination of these, a new hole for venting air is newly added to the magnesium alloy saddle. There is no need to provide it.
• FIG. 1 Cross-sectional view showing the process of forging a columnar magnesium alloy forged product.
• FIG. 2 Cross section showing the process for forging a hollow spherical magnesium alloy forged product.
• the mold and / or the magnesium alloy mold made of a material with a core that is breathable And a magnesium alloy forging method using the mold.
• FIG. 1 is a cross-sectional view showing a process of forging a columnar magnesium alloy forged product.
• the magnesium alloy used in this embodiment is AZ91D.
• the vertical type mold 1 for the magnesium alloy is composed of a net body made of a breathable material.
• the mesh body is made of stainless steel.
• the mesh wire diameter is 0.30 mm and the mesh is 20 mm.
• Mold 1 consists of upper mold 1 1 and mold 1 2.
• molten magnesium alloy 3 melted in the crucible 4 is poured into the space formed by the upper mold 1 1 and the lower mold 1 2.
• the temperature of the molten metal is 5600: ⁇ 80.
• the apparent thermal conductivity coefficient between the molten metal 3 and the upper mold 1 1 and the lower mold 1 2 becomes small.
• FIG. 2 is a cross-sectional view showing a process of forging a hollow spherical magnesium alloy forged product.
• the magnesium alloy is A Z 9 1 D as in Fig. 1.
• the cage mold 1 and the core 2 for the magnesium alloy are composed of a net body made of a gas-permeable material.
• the mesh body is made of stainless steel.
• the mesh wire diameter is 0.30 mm and the mesh is 20 mm.
• Mold 1 consists of upper mold 1 1 and mold 1 2.
• molten magnesium alloy 3 melted in the crucible 4 is poured into a space formed by the upper 11, the lower mold 12 and the core 2.
• the temperature of the molten metal 3 is 5 6 0 to ⁇ 80 Ot :.
• the upper mold 1 1, lower mold 1 2 and core 2 are made of a breathable net, so that there is a gap between the molten metal 3 and the upper mold 1 1, lower mold 1 2, core 2 and core.
• the apparent thermal conductivity coefficient is reduced. By reducing the apparent thermal conductivity coefficient force, even if the molten metal 3 comes into contact with the upper mold 1 1, the lower mold 1 2 and the core 2, the fluidity of the molten metal 3 is secured without instantaneously solidifying, and the upper mold 1 1 In addition, the molten metal 3 is spread over the entire space formed by the lower mold 12 and the core 2 (see Fig. 2 (c)).
• the finished fabrication is a composite of a magnesium alloy and stainless steel.
• the mold 1 and the core 2 are made of a mesh body, the fluidity of the molten metal 3 is ensured without heating the mold 1 and the core 2.
• the heating element and the temperature measuring device for heating the magnesium alloy mold 1 are not required, the cost of the forging apparatus can be reduced.
• the mold 1 and the core 2 for the magnesium alloy are made of a net, it is not necessary to provide a new hole for venting air in the mold 1 and the core 2.
• the present invention is not limited thereto, and the present invention can be achieved by changing the shape of the magnesium alloy mold.
• the shape of the forged product can be changed arbitrarily.
• the case where a net is used as a breathable material and the entire bowl is formed of a breathable material is described.
• the present invention is not limited to this. May be formed of a breathable material.
• the fluidity of the molten metal reaches the details and thin parts where it is easy to lose power.
• a net is used as a breathable material.
• magnesium alloy is not limited to this, but magnesium, aluminum, zinc, manganese, rare earth, heavy rare earth, yttrium, calcium, strontium, silver, silicon, Zirconium, Bellium, Nickel, Iron, Copper, Konolt, Sodium, Potassium, Barium medium strength, etc .: Selected and added magnesium alloys may be used.
• the net is woven in a weaving method such as plain weave, twill weave, twisted wire weave, cedar twill weave, satin weave, plain tatami weave, reverse tatami weave, stretch weave, chain-like vertical three-fold weave Can be used.
• a weaving method such as plain weave, twill weave, twisted wire weave, cedar twill weave, satin weave, plain tatami weave, reverse tatami weave, stretch weave, chain-like vertical three-fold weave Can be used.
• a force mesh using a mesh with a mesh of 20 can be selected in the range of 1.5 to 3600.
• a net having a net diameter of 0.3 O mm is used, but the net diameter can be selected in the range of 0.02 mm to 6 mm.
• the shape of the hole will affect the board thickness and air permeability.
• the shape and the aperture ratio can be set to arbitrary values.
• a cloth In the case of using a cloth, it is possible to use a woven fabric and a non-woven fabric that are air permeable, and any woven fabric, nonwoven fabric manufacturing method, and fiber diameter can be selected.
• the woven fabric having air permeability include a carbon fiber pre-predder having air permeability.
• the mesh body is made of stainless steel.
• the mesh body is, for example, aluminum alloy, nickel, monel, flame, red copper, phosphor bronze, copper, silver, gold, iron.
• Metals such as titanium, nichrome, hastelloy or inconel, PBO, heat-resistant chemical fibers such as carbon fiber or meta-aramide fiber, and heat-resistant ceramics such as carbon, mullite, alumina and zirconia Or a combination thereof.
• a plate and cloth having a plurality of holes may be formed of any one of the above metals, chemical fibers and ceramics, or a combination thereof.
• the net body, the board, and the cloth may have flexibility.
• the mesh body, the plate, and the bottom have flexibility, so that the magnesium alloy saddle can be easily manufactured.
• the present invention can also be applied to continuous forging.
• continuous forging for example, a continuous forging apparatus, a continuous forging roll, and a belt are formed of a breathable material.

Landscapes

• Engineering & Computer Science (AREA)
• Mechanical Engineering (AREA)
• Mold Materials And Core Materials (AREA)
• Molds, Cores, And Manufacturing Methods Thereof (AREA)
• Forging (AREA)

Priority Applications (3)

Applications Claiming Priority (2)

Publications (1)

Family

ID=41113889

Family Applications (1)

Country Status (5)

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Citations (3)

Family Cites Families (7)

• 2008
  • 2008-03-26 JP JP2008080509A patent/JP4748426B2/ja not_active Expired - Fee Related
• 2009
  • 2009-03-18 CN CN2009801105864A patent/CN101977710A/zh active Pending
  • 2009-03-18 WO PCT/JP2009/056034 patent/WO2009119701A1/ja active Application Filing
  • 2009-03-18 US US12/934,441 patent/US20110056644A1/en not_active Abandoned
  • 2009-03-18 EP EP09724927.0A patent/EP2263817A4/de not_active Withdrawn

Patent Citations (3)

Non-Patent Citations (1)

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