阅读说明：本技术 一种3d打印金属材料 (3D printing metal material ) 是由 王元飞 王宁 李伟刚 于 2020-05-25 设计创作，主要内容包括：本发明涉及3D打印技术领域,一种3D打印金属材料,其特征在于：所述3D打印金属材料包括以下组分的主料且各组分的重量份为：Al-Cu合金30-40份、Al-Mn合金25-35份、Si20-30份、Mg15-20份、Ni10-15份、Bi8-13份和Sn5-10份,还包括以下重量份的辅料海藻酸钠3-8份和硅酸乙酯2-6份。本发明制备的3D打印金属材料具有良好的力学性能,可以使得3D打印金属材料的组织性能大大细化,分布的相对均匀,避免了打印出的产品内部大的缺陷,具备良好的气密性、韧性、可塑性,高温时能抗氧化,硬度高,导热性较好,耐磨性较强,制备方法简单易操作,延长打印出产品的使用寿命。(The invention relates to the technical field of 3D printing, and discloses a 3D printing metal material, which is characterized in that: the 3D printing metal material comprises the following main materials in parts by weight: 30-40 parts of Al-Cu alloy, 25-35 parts of Al-Mn alloy, 25-30 parts of Si20, 15-20 parts of Mg, 10-15 parts of Ni, 8-13 parts of Bi and 5-10 parts of Sn, and also comprises the following auxiliary materials of 3-8 parts of sodium alginate and 2-6 parts of ethyl silicate by weight. The 3D printing metal material prepared by the invention has good mechanical properties, can greatly refine the structure properties of the 3D printing metal material, is relatively uniform in distribution, avoids the defect of large interior of a printed product, has good air tightness, toughness and plasticity, can resist oxidation at high temperature, has high hardness, good thermal conductivity and strong wear resistance, is simple and easy to operate in the preparation method, and prolongs the service life of the printed product.)

1. The utility model provides a 3D prints metal material which characterized in that: the 3D printing metal material comprises the following main materials in parts by weight: 30-40 parts of Al-Cu alloy, 25-35 parts of Al-Mn alloy, 25-30 parts of Si20, 15-20 parts of Mg, 10-15 parts of Ni, 8-13 parts of Bi and 5-10 parts of Sn, and also comprises the following auxiliary materials of 3-8 parts of sodium alginate and 2-6 parts of ethyl silicate by weight.

The method for preparing the 3D printing metal material comprises the following steps:

step one, raw material preparation: preparing main materials according to the weight parts, and treating oil stains and oxide layers on the surfaces of the main materials;

step two, mixing the main material and the sodium alginate, crushing by using a crusher, and adding ethyl silicate into the crushed material by using a grinder to grind so as to obtain metal material powder;

step three, putting metal material powder into a smelting furnace, heating the metal material powder from 50-70 ℃ to 800-950 ℃ until the raw materials are completely melted, and then preserving the heat for 1-2 hours to obtain alloy liquid;

step four, controlling the temperature of the alloy liquid at 700-;

step five, cooling the obtained metal material solution to 600-650 ℃, and forming a die casting on a die casting machine at an ultra-low-speed injection speed of 0.1-0.2 m/s;

and step six, cooling the die casting to a normal temperature state, grinding the die casting into powder by using a ball mill, and drying the powder at a low temperature to obtain the 3D printing metal material.

2. 3D printed metallic material according to claim 1, characterized in that: the alloy comprises, by weight, 35 parts of Al-Cu alloy, 28 parts of Al-Mn alloy, 25 parts of Si, 18 parts of Mg, 13 parts of Ni, 11 parts of Bi and 8 parts of Sn.

3. 3D printed metallic material according to claim 1, characterized in that: the alloy comprises the following main materials, by weight, 38 parts of Al-Cu alloy, 30 parts of Al-Mn alloy, 23 parts of Si, 19 parts of Mg, 13 parts of Ni, 10 parts of Bi and 7 parts of Sn.

4. 3D printed metallic material according to claim 1, characterized in that: the alloy comprises the following main materials, by weight, 34 parts of Al-Cu alloy, 28 parts of Al-Mn alloy, 23 parts of Si, 16 parts of Mg, 12 parts of Ni, 9 parts of Bi and 8 parts of Sn.

5. 3D printed metallic material according to claim 1, characterized in that: in the fourth step, the inert gas is any one of helium, neon, argon and krypton, and the purity is more than 98%.

6. 3D printed metallic material according to claim 1, characterized in that: in the fourth step, if scum appears after refining, the scum needs to be fished out and secondary refining is carried out.

7. 3D printed metallic material according to claim 1, characterized in that: in the fourth step, the vacuum in the smelting furnace is increased to below 0.05MPa for refining.

Technical Field

The invention relates to the technical field of 3D printing, in particular to a 3D printing metal material.

Background

A 3D printer, also known as a three-dimensional printer (3DP), is a machine that is an additive manufacturing technique, i.e., a rapid prototyping technique, which is based on a digital model file, and manufactures a three-dimensional object by printing a layer of adhesive material on a layer by layer using an adhesive material such as a special wax material, powdered metal, or plastic. State of the art three-dimensional printers are used to manufacture products. Techniques for building objects in a layer-by-layer printing manner. The principle of the 3D printer is that data and raw materials are put into the 3D printer, and the machine can build the product layer by layer according to the program. The 3D printer stacks sheets in various forms. The 3D printer is the biggest difference from the traditional printer in that the used "ink" is a real raw material, the form of the stacked thin layers is various, and the media available for printing are various, from various plastics to metals, ceramics and rubber substances;

however, the existing 3D printing metal material has low strength and elongation, is easy to deform and even cause the fracture of a printed product, and cannot meet the requirements of products needing to bear large dynamic load, so that the printed product has poor quality and short service life.

Disclosure of Invention

The invention aims to provide a 3D printing metal material, which aims to solve the problem that the 3D printing metal material in the prior art is low in strength and elongation.

In order to achieve the purpose, the invention provides the following technical scheme: the 3D printing metal material comprises the following main materials in parts by weight: 30-40 parts of Al-Cu alloy, 25-35 parts of Al-Mn alloy, 25-30 parts of Si20, 15-20 parts of Mg, 10-15 parts of Ni, 8-13 parts of Bi and 5-10 parts of Sn, and also comprises the following auxiliary materials of 3-8 parts of sodium alginate and 2-6 parts of ethyl silicate by weight.

The method for preparing the 3D printing metal material comprises the following steps:

step one, raw material preparation: preparing main materials according to the weight parts, and treating oil stains and oxide layers on the surfaces of the main materials;

step two, mixing the main material and the sodium alginate, crushing by using a crusher, and adding ethyl silicate into the crushed material by using a grinder to grind so as to obtain metal material powder;

step three, putting metal material powder into a smelting furnace, heating the metal material powder from 50-70 ℃ to 800-950 ℃ until the raw materials are completely melted, and then preserving the heat for 1-2 hours to obtain alloy liquid;

step four, controlling the temperature of the alloy liquid at 700-;

step five, cooling the obtained metal material solution to 600-650 ℃, and forming a die casting on a die casting machine at an ultra-low-speed injection speed of 0.1-0.2 m/s;

and step six, cooling the die casting to a normal temperature state, grinding the die casting into powder by using a ball mill, and drying the powder at a low temperature to obtain the 3D printing metal material.

Preferably, the alloy comprises the following main materials, by weight, 35 parts of Al-Cu alloy, 28 parts of Al-Mn alloy, 25 parts of Si, 18 parts of Mg, 13 parts of Ni, 11 parts of Bi and 8 parts of Sn.

Preferably, the alloy comprises the following main materials, by weight, 38 parts of Al-Cu alloy, 30 parts of Al-Mn alloy, 23 parts of Si, 19 parts of Mg, 13 parts of Ni, 10 parts of Bi and 7 parts of Sn.

Preferably, the alloy comprises the following main materials, by weight, 34 parts of Al-Cu alloy, 28 parts of Al-Mn alloy, 23 parts of Si, 16 parts of Mg, 12 parts of Ni, 9 parts of Bi and 8 parts of Sn.

Preferably, in the fourth step, the inert gas is any one of helium, neon, argon and krypton, and the purity is 98% or more.

Preferably, in the fourth step, if scum occurs after refining, the scum needs to be fished out and secondary refining is carried out.

Preferably, in the fourth step, refining is performed by raising the vacuum in the smelting furnace to below 0.05 MPa.

The 3D printing metal material provided by the invention has the beneficial effects that: the 3D printing metal material prepared by the invention has good mechanical properties, can greatly refine the structure properties of the 3D printing metal material, is relatively uniform in distribution, avoids the defect of large interior of a printed product, has good air tightness, toughness and plasticity, can resist oxidation at high temperature, has high hardness, good thermal conductivity and strong wear resistance, is simple and easy to operate in the preparation method, and prolongs the service life of the printed product.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.