Unlock instant, AI-driven research and patent intelligence for your innovation.

Dedicated scandium-free Al-Mg-Mn alloy powder for high-strength aluminum alloy 3D printing and preparation method thereof

A technology of alloy powder and 3D printing, which is applied in the direction of additive processing, etc., can solve the problems of restricting the promotion of 3D printing technology, low mechanical properties, and expensive alloys, and achieve excellent mechanical properties, fine and uniform structure, and no cracks.

Active Publication Date: 2020-05-19
CENT SOUTH UNIV +1
View PDF4 Cites 5 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

It is easy for academia and industry to think of making traditional casting and forging grades of aluminum alloys into powders with the same composition, which can be directly used in 3D printing, but they face the following problems: First, traditional grades of aluminum alloys such as 2-series to 7-series aluminum alloys The 3D printing of gas-atomized powder has severe cracking and poor performance; secondly, only the cast AlSi alloy of the 4 series of traditional aluminum alloys is suitable for 3D printing, but its mechanical properties are not high (tensile <400MPa, elongation < 6.5%)
[0003] At present, relevant literature and patents report Al-Mg-Sc 3D printing high-strength aluminum alloys. However, the content of scandium (Sc) in this alloy generally exceeds 0.6wt%. However, metal scandium is 5 times the price of gold, and scandium is my country's scarce resources and strategic resources have very little content in the earth's crust. Therefore, 3D printing high-strength Al-Mg-Sc alloys are expensive, which limits the promotion of 3D printing technology to civilian industries.

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Dedicated scandium-free Al-Mg-Mn alloy powder for high-strength aluminum alloy 3D printing and preparation method thereof
  • Dedicated scandium-free Al-Mg-Mn alloy powder for high-strength aluminum alloy 3D printing and preparation method thereof
  • Dedicated scandium-free Al-Mg-Mn alloy powder for high-strength aluminum alloy 3D printing and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035] (1) The chemical composition of scandium-free Al-Mg-Mn alloy powder for 3D printing is (according to the mass of scandium-free Al-Mg-Mn alloy powder for 3D printing as a percentage, the same below): Mg: 5.5%, Mn: 1.5%, Zr: 0.5%, Ni: 0.2%, Fe: 0.23%, Mo: 0.13%, and the balance is alloy element Al.

[0036] (2) The preparation method of the above-mentioned scandium-free Al-Mg-Mn alloy powder for 3D printing is as follows:

[0037] Raw material smelting: Add high-purity Mg ingot, Al-Mn master alloy, Al-Zr master alloy, Al-Ni master alloy, Al-Fe master alloy, Al-Mo master alloy and high-purity Al ingot to the In a vacuum induction furnace, the melting temperature is 800°C and the temperature is kept for 30 minutes;

[0038] Atomized pulverization: transfer the smelted pre-alloyed metal into an atomized tank, and use helium to atomize and pulverize, the gas pressure is 2-4MPa, and the gas flow rate is 2-4mL / min;

[0039] Powder screening: carry out mesh screening on the pr...

Embodiment 2

[0048] (1) The chemical composition of scandium-free Al-Mg-Mn alloy powder for 3D printing is (according to the mass of scandium-free Al-Mg-Mn alloy powder for 3D printing as a percentage, the same below): Mg: 6.0%, Mn: 1.7%, Zr: 0.7%, Ni: 0.25%, Fe: 0.25%, Mo: 0.17%, and the balance is alloy element Al.

[0049] (2) The alloy of the chemical composition is atomized and pulverized to obtain a printing powder, and the specific method is as shown in (2) in Example 1.

[0050] (3) After laser 3D printing without heat treatment, the specific data of tensile strength, elongation at break and microhardness are shown in Table 1.

[0051] (4) The metallographic diagram of specific parts of 3D printing high-strength Al-Mg-Mn alloy is shown in image 3 , it can be seen that there are no cracks inside.

Embodiment 3

[0053] (1) The chemical composition of scandium-free Al-Mg-Mn alloy powder for 3D printing is (according to the mass of scandium-free Al-Mg-Mn alloy powder for 3D printing as a percentage, the same below): Mg: 7.5%, Mn: 1.9%, Zr: 0.9%, Ni: 0.3%, Fe: 0.29%, Mo: 0.22%, the balance is alloy element Al, and the balance is alloy element Al.

[0054] (2) The alloy of the chemical composition is atomized and pulverized to obtain a printing powder, and the specific method is as shown in (2) in Example 1.

[0055] (3) After laser 3D printing without heat treatment, the specific data of tensile strength, elongation at break and microhardness are shown in Table 1.

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

PropertyMeasurementUnit
particle sizeaaaaaaaaaa
tensile strengthaaaaaaaaaa
hardnessaaaaaaaaaa
Login to View More

Abstract

The invention discloses a dedicated scandium-free Al-Mg-Mn alloy powder for high-strength aluminum alloy 3D printing and a preparation method thereof. The dedicated scandium-free Al-Mg-Mn alloy powderfor high-strength aluminum alloy 3D printing comprises the following components in percentage by mass: 5.5%-9% alloy element Mg, 1.5%-2.5% of alloy element Mn, 0.2%-1.2% of alloy element Zr, 0.2%-0.45% of alloy element Ni, 0.1%-0.35% of alloy element Fe, 0.1%-0.40% of alloy element Mo and the balance of alloy element Al. An element Sc is replaced with a cheap element, the Al-Mg-M (M is a low-costelement) alloy powder for 3D printing is developed, the mechanical properties of printed parts are comparable to those of scandium-containing aluminum alloys, and the cost is reduced by 40%. When thehigh mechanical properties of the printed parts are realized, the cost is lower and the alloy powder is suitable for industrial applications.

Description

technical field [0001] The invention belongs to the field of additive manufacturing 3D printing materials, and in particular relates to a scandium-free Al-Mg-Mn alloy powder for high-strength aluminum alloy 3D printing and a preparation method thereof. Background technique [0002] In recent years, due to the important demand for lightweight and high-performance products of high-end equipment such as aerospace and rail transit, the demand for 3D printing (also known as additive manufacturing) of complex lightweight aluminum alloy components has also attracted more and more attention: first , light weight requirements, traditional simple shape parts are transformed into complex shape parts after topology optimization, and 3D printing is an important method to solve complex structural parts manufacturing; second, the requirement of fine grain strengthening, grain refinement is the key to improve the It is an important method for the mechanical properties of products, but the g...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Applications(China)
IPC IPC(8): B22F1/00C22C21/06B22F9/08B33Y70/00
CPCB22F1/0003B22F9/082C22C21/06B33Y70/00
Inventor 李瑞迪王敏卜袁铁锤王银牛朋达张志坚
Owner CENT SOUTH UNIV