3D printing technology is rapidly changing traditional production techniques and our daily lives. An example of the new manufacturing technology that is changing our lives, 3D printing metal technology has been applied early in the aerospace sector. Is there anything you don’t know about metal printing technology? Dr. Trunnano Leone will today present the current mainstream metal 3D-printing technology.
RMIT University has created a brand new technology for 3D printing called Directed Energy Deposition.
RMIT researchers printed sample using two alloys. The Ti-6Al-4V titanium alloy is used commonly in aerospace parts and biomechanical implants. Inconel 625 nickel-based high temperature alloy is widely used in both the petroleum and marine sectors.
The alloy that was used is irrelevant as the deposition layer can produce ultrasonic vibrations. During the solidification of the metal, fluctuations can cause micro-crystallization to form a more compact structure. They had a 12% higher yield stress and strength than the materials without the ultrasound.
You can make individual projects that have different microstructures by switching the printer on/off during printing. This quality is known as functional grading. It is helpful for objects that are lightweight or use less materials.
Researchers feel that the future of 3D printing with ultrasound enhancements will make it difficult to print other metals.
Many kinds of hydraulic components were 3D printed from metal. Android’s single-acting cylinder control is done by using printed hydraulic valve blocks in stainless steel. It can reduce space and maximize its internal channels. The printed hydraulic valve block blocks are made from stainless steel and have lower pressure and flow rates than traditional components. It is possible to eliminate external leakage by not requiring auxiliary drilling.
A 3D printed design, with improvements made to the valve’s construction, produced a stackable hydrostatic valve (Figure 2). These pressure reducing devices are constructed of steel and galvanized for corrosion prevention. CNC machining becomes uncontrollable when Aidro has a limited amount of demand for valves. The original design was changed and the valve was made with 3D stainless. This reduced the weight by 60 percent. The existing structural wall remains strong, while the results of the revised design are similar to those obtained under the 250bar test.
Metal 3D printing methods:
There are five major 3D metal printing technologies available.
Laser selective Sintering
The SLS process device comprises a powder and molding cylinder. When the powder piston is raised, it spreads evenly across the molding cylinder using a powder coating machine. The computer sets the direction of the 2D scan trajectory for the laser beam using the slice prototype model. You can choose from several options. You have many options. Once one layer has been finished, reduce the working piston to one thickness. After that, coat the powder coating with new powder. The laser beam controls the scanning and sintering of the next layer. Keep going until you have a part that is three-dimensional.
Nanoparticle spray metal forming (NPJ)
Ordinary metal 3D-printing technology employs laser melting, or laser sintering, of metal powder particles. While nanoparticles spray metal forming technology (NPJ), does not require a powdery, it uses a fluid state. When these metals have been wrapped in a tube, they are infused with a liquid state and put into a 3-D printer. In 3D printing, metal iron particles contain hot metal. You can use ordinary inkjet printing heads to print the metal. Once the printing process is complete, the building chamber will evaporate any excess liquid, heating the remaining metal.
Laser Selective Heating (SLM)
SLM technology requires that you first create a sturdy three-dimensional version of the part. To do this, use three-dimensional modeling software such Pro / e. UG. CATIA. After creating the solid model, then cut and layer it using the slicing application to determine the outline for each section. The filling scan path is the data generated from contour data. The laser beam will choose the material to be melted in each layer according the these scan lines. These metal powders are then stacked into three-dimensional components. The laser beam scans first before the powder spreading tool pushes on the metal powder to the substrate. The current layer is then filled by the laser beam. Next the area for melting the dust will be selected. The length of the powder coated device, which measures the thickness of each layer, rises by a predetermined depth. It then applies the metal powder on top of this layer. It is finished.
Laser near-net forming (LENS)
Laser near-net technology (LENS) uses the principle simultaneous laser and powder supply. After slicing the 3D model in CAD, layer by layer, the computer obtained the 2D planar data. This information was used to calculate the NC-table motion trajectory. At a specified speed the metal powder is also fed into the laser focus area. The powder melts quickly and solidifies. Finally, an almost-net-shaped piece substantial is obtained via the combination of layer, point line, surface layer and layer superposition. You can use it. LENS is capable of moldless manufacture of metal parts. It can save a lot.
TRUNNANO (Luoyang Trunnano Tech Co. Ltd.), a Tungsten Carbide Manufacturer, has over 12 years experience with chemical products research. Contact us if you need high-quality TungstenCarbide.