Click to view the video on YouTube.
The video gives an overview of Laser Deposition Technology and its main components:
1) Laser Repair Technology, 2) Laser Freeform Manufacturing Technology, and 3) Laser Cladding Technology.
Laser Deposition Technology (LDT) is a blanket name that encompasses many "like"
processes—direct metal deposition (DMD), laser additive manufacturing (LAM),
laser metal deposition, and others—that use a focused
laser beam as the heat source for depositing powdered metals.
Transcript of Laser Deposition Technology Video
Laser Deposition Technology (LDT)
LDT, which stands for Laser Deposition Technology, is an
additive process that is used to build freeform fabrications,
repair metal components typically considered non-repairable by
conventional techniques, or strategically add features to forgings
or castings. All of these capabilities come directly from CAD data.
No hard tooling changes are required.
LDT deposits exhibit excellent material properties. These material
properties, combined with the flexibility of the process, significantly
lower overall production costs. When used for manufacturing and the
production of prototypes, the LDT process greatly reduces product
First, a 3D CAD file is created that defines the component that is
to be built. Next, the system software uses this file to slice the
piece into numerous horizontal sections and then creates a tool path
for each layer. This tool path is followed by the laser as the piece
is created, layer by layer. The build takes place in a controlled environment
chamber with less than 10 parts-per-million oxygen. Once the chamber
is prepared, the build can begin.
The laser fires and creates a melt pool on the surface of the target
plate. A stream of powered metal is delivered into the melt pool. When
the powdered metal impacts the melt pool, it is absorbed into the melt
pool and creates a weld bead. Fusing multiple layers together generates
a 3D solid metallic build. A variety of alloys can be used in this process
including tool steels, stainless steels, nickel, cobalt and titanium alloys.
Deposit quality and consistency is of primary importance for all laser deposits.
Weld beads are produced in a very low oxygen environment with a very small laser spot
size and relatively high travel speeds. The laser deposits have extremely high
cooling rates. These cooling rates generate a very small localized heat effect
zone thus minimizing distortion. Also the high cooling rates result in laser
deposits that have a very fine microstructure. Therefore, the deposits typically
have similar mechanical and physical properties compared to wrought products.
Laser Freeform Manufacturing Technology (LFMT)
LFMT, which stands for Laser Freeform Manufacturing Technology, possesses a
unique ability to build parts with novel geometries from high quality metal alloys
and may transition to functionally gradient material compositions opening the door
for the production of breakthrough end products. Complex forgings and castings may
be simplified and reduced in size followed by the creative addition of specific features
using the process. Substantial material and cost savings may be achieved using this
novel combination of processes. Additional cost savings may be realized by the reduction
of final machining time. Implementing design changes and new iterations for freeform
builds is far simpler using this process than many traditional processes. Modifications
are made in the CAD model, new tool paths are generated, and a new version of the piece
Laser Cladding Technology (LCT)
LCT, which stands for Laser Cladding Technology, is also a very effective process
for performing repairs on heat sensitive materials, such as 4340 or PH grade stainless
steels. After the wear area is identified and a tool path is generated, the repair is
initiated. By carefully controlling laser power and travel speeds, the heat effect and
dilution zones are minimized. The result is a very low stress input into the part which
results in very low distortion.
After a build is completed, the component is scanned using a portable CMM and scanning
laser. The scanned file is compared to the original file to be certain no significant
distortions have occurred and that enough material has been deposited to ensure clean-up
during final machining. Minor discrepancies are carefully noted so that future potential
distortions can be compensated for and therefore avoided.
LDT Applications are Endless
With Laser Deposition Technology, potential applications are endless, and the advantages
over traditional methods of creating small runs, prototypes and performing repairs are
substantial. Lower per-piece production costs, lower up-front tooling costs, and greatly
decreased development time, represent significant savings in time and money. Enhanced design
flexibility leads to better products. Superior material properties provide longer product life
and the process can create products and repairs that are impossible using current traditional
For answers to your questions about specific applications, contact
RPM Innovations, Inc.