The invention provides a high-strength aluminum alloy for additive manufacturing and a preparation method of high-strength aluminum alloy powder. The high-strength aluminum alloy powder is prepared byadopting a gas atomization process. The preparation method comprises the following steps of: firstly, melting an Al-Si-Zn-Cu-Mg-X alloy prefabricated ingot by adopting a medium frequency induction furnace, then powdering by adopting a supersonic speed gas atomization process, sieving and preparing powder of different specifications for additive manufacturing. A test sample obtained by adopting the high-strength aluminum alloy powder through additive manufacturing has compact texture without crack defects, the strength of extension exceeding 500MPa and the elongation exceeding 3%; the strengthperformance of the test sample is obviously superior to the strength performance of additive manufacturing test samples of AlSi10Mg, AlSi7Mg and AlSi12; and the performances of the test sample are also superior to the performances of additive manufacturing test samples of conventional 2000 series and 7000 series alloys. The alloy powder can be used for preparing aluminum alloy parts with compacttexture, complicated shapes and high strength in an additive manufacturing method to meet the requirements of use occasions on high specific strength and complicated shapes in the fields of aviation,spaceflight and automobiles.

High-strength aluminum alloy for additive manufacturing and preparation method of high-strength aluminum alloy powder

The invention relates to a preparation method of Al-Mg-Mn-Sc-Zr aluminum alloy powder for additive manufacturing. The preparation method comprises the following steps of adding pure aluminum ingots toa crucible of an intermediate frequency furnace, and preheating the aluminum ingots; increasing the temperature of a smelting chamber to 700 to 850 DEG C, and introducing argon to the smelting chamber when pure aluminum is molten, so that the pressure of the smelting chamber is 0.6 to 0.9 MPa; increasing the melt temperature in the crucible to 1150 to 1300 DEG, adding pure manganese and pure zirconium, and insulating for 15 to 25 min; lifting the crucible, cooling to 800 to 900 DEG C, adjusting the pressure of the smelting chamber to 0.3 to 0.7 MPa, adding Al-Sc intermediate alloy, and insulating for 5 to 15 min after melting; lowering the melt temperature in the crucible to 700 to 790 DEG C, adjusting the pressure of the smelting chamber to 0.05 to 0.15 MPa, and adding pure magnesium ingots; and keeping the crucible at 780 to 820 DEG C after the magnesium ingots are completely molten; and preparing powder in a gas atomization powder preparation mode. Compared with existing aluminum alloy powder for additive manufacturing, the aluminum alloy powder prepared by adopting the preparation method has good geographical performance, additionally, the preparation process is simple, the preparation cost is low, and the preparation method has great significance to the additive manufacturing.

Al-Cu-Li-Sc-Zr aluminum alloy powder for additive manufacturing and preparation method thereof

The invention provides a high-strength and ductility aluminum-silicon-based composite welding wire and a preparation method thereof. The reinforcing phase of the aluminum-silicon composite material welding wire is in-situ self-generated TiB2 ceramic particles, and a matrix alloy is Al - Si - Mg, wherein the weight percentage of Al - Si is 6.5%-7.5%, the weight percentage of Mg is 0.4%-1. The preparation method comprises the following steps of taking pure aluminum, Al-Si intermediate alloy, Al-Cu intermediate alloy, Al-Mg intermediate alloy and the like as raw materials to prepare intermediatemelt, and after homogenization heat treatment, carrying out hot extrusion, drawing and surface treatment on the intermediate melt to obtain the composite material welding wire. According to the preparation method of the aluminum-silicon-based composite material welding wire, the prepared aluminum-silicon-based composite material welding wire is suitable for electric arc additive manufacturing technology.

High-strength and ductility aluminum-silicon-based composite welding wire and preparation method thereof

The invention relates to the technical field of preparation of powder for material additive manufacturing, and particularly discloses 7000 series aluminum alloy powder for the material additive manufacturing and a preparation method thereof. The 7000 series aluminum alloy powder for the material additive manufacturing comprises the following components of, by mass, 1-3% of copper, 1-3% of magnesium, 5-7% of zinc, 6-12% of titanium, 1-6% of boron carbide and the balance aluminum. The 7000 series aluminum alloy powder cannot form larger columnar crystals and thermal cracks during periodic melting and solidification in the preparation process by optimizing the contents of the copper, the magnesium and the zinc and adding titanium element and the boron carbide on the basis, so that the printing performance of the alloy powder is effectively improved, the alloy powder is enabled to be suitable for the material additive manufacturing, printing parts are enabled to have excellent mechanical properties, and the excellent mechanical properties can be achieved without adding additional reinforcing elements; and the production cost is reduced, and the application prospect is wide.

7000 series aluminum alloy powder for material additive manufacturing and preparation method thereof

The invention belongs to the technical field of multiphase ceramic, and discloses titanium diboride-based multiphase ceramic and a preparation method and application thereof. The titanium diboride (TiB2)-based multiphase ceramic is prepared according to the following steps: with metal Ti powder and B4C powder as raw materials and WC balls as a ball milling medium, mixing through ball milling on ahigh-energy ball mill to obtain Ti-B4C powder in which the B4C is coated with the metal Ti, and then performing printing forming on the Ti-B4C powder in Ar or vacuum by a selective laser melting method. The multiphase ceramic is a ceramic material with a net size and a complex shape. By the preparation method, additive manufacturing forming of the TiB2-based ceramic is directly achieved, subsequent sintering or heat treatment is not required, and the fracture toughness of the TiB2-based multiphase ceramic is effectively improved; as a wave-transmitting material, the TiB2-based multiphase ceramic can be applied to the field of aerospace.

Titanium diboride-based multiphase ceramic and preparation method and application thereof

The invention provides a preparation method of 7XXX series in-situ aluminum-based composite material powder for laser additive manufacturing. The preparation method comprises the following steps: heating commercially pure aluminum; after covering with a high-temperature covering agent, raising the temperature and smelting; uniformly mixing KBF4 and K2TiF6; after drying, adding a mixture into a melt; after reacting, sequentially adding a needed intermediate alloy, commercially pure Mg and commercially pure Zn; adding a refining agent into the melt and carrying out degassing and refining; then carrying out gas atomization to obtain the 7XXX series in-situ aluminum-based composite material powder. According to the method provided by the invention, an in-situ TiB2 micron-nano-sized particle enhanced 7XXX series composite material is prepared by adopting an in-situ melt automatic generation and high-temperature gas atomization method; TiB2 particle enhanced aluminum-based composite materialpowder is prepared; TiB2 particles are uniformly dispersed in an aluminum matrix. The aluminum-based composite material powder prepared by the method has a good laser absorption rate and is suitablefor a laser additive manufacturing technology.

7XXX series in-situ aluminum-based composite material powder for laser additive manufacturing and preparation

The invention provides a preparation method of 6XXX-series in-situ aluminum-based composite material powder for laser additive manufacturing. The preparation method of the 6XXX-series in-situ aluminum-based composite material powder for laser additive manufacturing comprises the steps of heating commercially pure aluminum, covering through a high-temperature covering agent, and heating for smelting; uniformly mixing KBF4 and K2TiF6, drying, and adding into a melt; after reaction, sequentially adding a required intermediate alloy and commercially pure Mg, adding a refining agent into the melt for degassing and refining, and then carrying out gas atomization; and obtaining the 6XXX-series in-situ aluminum-based composite material powder for laser additive manufacturing. According to the method, the in-situ TiB2 micro-nano-particle reinforced 6XXX-series composite material is prepared by adopting an in-situ melt growth and high-temperature gas atomization method, and through preparing theTiB2 particle reinforced aluminum-based composite material powder, TiB2 particles are uniformly and dispersedly distributed in an aluminum matrix. The aluminum-based composite material powder prepared through the method has favorable laser absorptivity and is applicable to a laser additive manufacturing technology.

6XXX-series in-situ aluminum-based composite material powder for laser additive manufacturing, and preparation

The invention provides a preparation method of aluminum-based composite material powder for laser reinforcement manufacturing. The preparation method comprises the following steps that pure aluminum,Al-Zr intermediate alloy, Al-Sc intermediate alloy, Al-Mn intermediate alloy, Al-Ti intermediate alloy, industrial pure Mg, KBF4 and K2TiF6 are used as raw materials. In-situ TiB2 micro-nanoparticle reinforced Al-Mg composite materials are prepared by in-situ melt self-control method, and TiB2 particle reinforced aluminum-based composite material powders are prepared by high temperature gas atomization. The median particle size of the powder particles is controllable in the range of 3-180[mu]m, the spherical rate is more than 90%, the powder yield is more than or equal to 60%, and the laser absorption rate is more than or equal to 45%. Nano-sized TiB2 particles are uniformly dispersed in the aluminum alloy matrix, and the grain structure of the composite material is uniform and fine equiaxed grains. The aluminum-based composite material powder has good laser absorptivity, is suitable for laser reinforcement manufacturing technology and can exhibit good mechanical properties when used in laser reinforcement manufacturing.

Aluminum-based composite material powder for laser reinforcement manufacturing and preparation method thereof

The invention provides a method for preparing an in-situ self-generated TiB2 reinforced composite material based on SLM. The method comprises the following steps of A1, taking KBF4 and K2TiF6 powdersas raw materials, and using a mixed salt reaction method for preparing the in-situ self-generated TiB2 nano-particle reinforced Al7SiCu 0.5Mg composite material; A2, carrying out vacuum atomization onthe composite material obtained in the step A1 to obtain a composite material powder; and A3, carrying out 3D printing on the composite material powder to obtain a SLM sample. According to the methodfor preparing the in-situ self-generated TiB2 reinforced composite material, the SLM is adopted to prepare the in-situ self-generated TiB2 nano-particle reinforced Al7SiCu 0.5Mg composite material, the microstructure of the composite material is greatly refined, and obvious holes or cracks are not observed in the composite material; and moreover, the strength is greatly improved on the premise that the plasticity is guaranteed, and huge application potential is obtained in the aerospace field.

Method for preparing in-situ self-generated TiB2 reinforced composite material based on SLM

The invention discloses a preparation method for an in-situ aluminum-based composite material. The preparation method comprises the following steps of: adding a high-temperature covering agent into pure aluminum to smelt, thereby obtaining melt; adding KBF4 and KTiF6 into the melt, and uniformly mixing to react; removing a byproduct, and sequentially adding an aluminum-copper intermediate alloy, an aluminum-zirconium intermediate alloy, an aluminum-scandium intermediate alloy, an aluminum-manganese intermediate alloy, an aluminum-titanium intermediate alloy and pure magnesium, adding a harmless aluminum alloy refining agent, and performing degassing refining and gas-atomizing at a temperature being 700-850 DEG C, thereby obtaining in-situ self-generated TiB2 particle reinforced Al-Cu-Mg composite material powder. The preparation method prepares the aluminum-based composite material which is high in laser absorbing rate and is high in particle spheroidization rate; and moreover, the preparation method is simple in operation, is simple and liable to implement, is low in cost, is high in efficiency and is suitable for large-scale production.

Preparation method for in-situ aluminum-based composite material

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