3D Printing Technology
3D Printing refers to the technology to create a three-dimensional object by adding one by one the materials with various types such as liquid, wire, powder and pellet based on the three-dimensional data.
The ASTM(American society for testing and materials) officially use the term of ‘Additive Manufacturing’ contrary to ‘Subtractive Machining’ instead of the term of ‘3D Printing’.
3D Printing technology has the advantages that a prototype can be rapidly manufactured without technology or tool, and that, during the process, you can mofify, reproduce and check it. Therefore, as its time and costs are expected to drastically decrease compared to the ones of the existing manufacturing/assembling processes through cutting or drilling, we expect that it will make the innovative changes in the production methods of the manufacturing fields.
The price declines of 3D printers for manufacturing the companies’ expensive prototypes enables the customers to produce the personalized tools and toys by themselves and are also expected to increase the applications to a variety of the fields such as personal care goods including individual prosthetic legs, arms (hands), artificial organs, entertainment, medical devices, food, home appliances, construction and defense.
Meanwhile, the manufacturing processes of 3D printing equipment are the essential considerations to realize the three-dimensional objects by effectively using metal powders.
The typical metal 3D printing techniques are the PBF (Powder bed fusion) process and DED (Directed energy deposition) process. PBF is an additive manufacturing process that produces parts from the bottom up by using a laser or electron beam that continuously iterates layer by layer solidifying power with tens of ㎛ in thickness on top of a powder bed according to the prepared design map. This process is interchanged with the various terms such as SLS (Selected laser sintering), SLM (selected laser melting), laser cursing, DMLS(Direct metal laser sintering), which are same in the basic principle.
Smooth and homogeneous spreading of powder materials over the build platform during the manufacturing process is the key factor to avoid any defect or void, and to achieve high density, high intensity and preciseness after additive loading. The main materials used include Steel, Al, Ti, Co-Cr, Ni alloy, which are known to have the advantage of realizing various shapes and form freedom such as mold and die. The essential requirements for metal powders in the PBF process include 10~50㎛ in size and globular shape.
DED is a metal 3D printing technology for supplying powder in real time under the shielding gas atmosphere and for adding the metal parts relatively fast through melting and welding by high power laser beam. It is suitable for fast process speed and face-to-face shape manufacturing, and has various applications such as repair of worn components, modification of tooling for re-use shaft, ducts, airfoils and coating. The possible materials include Ti, Ni, Cu, SUS, Al alloy. The metal powders with 50~150㎛ of particle size distribution and relatively free shapes are used in this DED process.
Therefore, HANA AMT developed mass production technology for ultralight magnesium powders firstly through gas atomization process in Korea, and, with its experiences and know-how, continues to put through technical improvements in low-cost manufacturing of high-quality 3D printing metal powders applicable to the PBF or DED method. We are making our efforts at the moment to become a leading metal powder material manufacturer which can contribute to the development of metal 3D printing technologies and satisfy various needs of our customers..
||POWDER BED FUSION
||DIRECTED ENERGY DEPOSITION
||5-20㎠/h (~40~160 g/h)
||Up to 0.5 kg/h (~70㎠/h)
||±0.02 - 0.05mm/25mm
||±0.125 - 0.25mm/25mm
||0.04 - 0.2mm
||0.5 - 1.0mm
||Ra 4-10 μm
||Ra 7-20 μm
|Max. part size
||630mm x 400mm x 500mm
||2000mm x 1500mm x 750mm
||Steel, Al, Ti, CoCr, Ni, base alloy, Mg, Cu
||Steel,Ti, ni base alloy,ceramic
||Molds and die(tool inserts All types of component
||Repair of worn components Modification of tooling for re-use Shaft, ducs,airfoils and coating
Source: Dr. Kang Min-Cheol, The Present Situations and Problems of 3D Metal Printing Technologies at Home and Abroad, Technical Bulletin of Powder Metallurgy, Volume 5 Number 1, 2015
Gas Atomization Process (Gas Atomization)
Gas Atomization (Gas Atomization Process) is one of the이란 금most common methods for manufacturing metal powders,
which is a process for manufacturing fine powders by ejecting gas into molten metal.
During the gas automization process, metal powders are obtained when the high pressure gas jets from the nozzle gives the strong impact energy
to molten metal droplets during their fall through the orifice.
The changes of the factors such as gas type and pressure, internal diameter of orifice and nozzle type have an effect on the major characteristics
such as powder properties, shapes and particle size distribution.
Properties of HANA AMT’s metal powders
that manufactured by gas atomization
Globular powders with homogeneous particle size distribution
Easy to be synthesized and mixed
with other element powders
Efficient control of
powder oxygen density
Possible to manufacture powders
with irregular shapes
Quality Management & Analysis
HANA AMT’s Research Institute is actively involved in ceaseless R&D and analysis for a world-class technology and innovation.