Research on Laser Powder Bed Melting and Forming of Inconel625 Nickel-based Alloy

(Research on Laser Powder Bed Melting and Forming of Inconel625 Nickel-based Alloy)

Additive manufacturing, also known as 3D printing, is an advanced
manufacturing technology developed in the past 30 years. In theory, additive
manufacturing technology can convert any CAD model into a physical entity, which
greatly increases the geometric design freedom and manufacturing capabilities of
complex parts.

For metals, laser powder bed fusion (L-PBF: laser powder bed fusion, also
known as selective laser melting molding SLM) mainly uses a high-energy laser
beam to melt a pre-set thin layer of metal powder layer by layer, during
solidification and cooling. High-performance parts can be formed later, which is
one of the most promising additive manufacturing technologies. This technology
is especially suitable for the forming and processing of small batch,
high-precision, personalized and complex structure parts, and has a wide range
of application prospects in aerospace, biomedical, automotive, abrasive tools
and other fields.

Inconel 625 (IN625) is a nickel-based superalloy, which mainly uses the solid
solution strengthening effect of elements such as molybdenum (Mo) and niobium
(Nb) in the Ni-Cr matrix to obtain high-temperature strength and creep
resistance. The corrosion resistance and solderability in the environment are
also good. However, because of its high hardness, low thermal conductivity and
high work hardening rate, IN625 is considered to be an alloy that is difficult
to machine or is difficult to manufacture with subtractive materials. In the
process of machining, machining tools wear quickly, and this material It is
difficult to control its performance during casting or forging. Therefore, it is
necessary to explore the direct 3D printing forming of Inconel 625 nickel-based
superalloy, which greatly reduces the machining required in traditional
manufacturing, while also greatly improving the design freedom of parts and
increasing internal complex cooling channels.

At present, the aerospace industry has continuously improved the performance
and efficiency requirements of components under extreme temperatures and
environments. Laser powder bed melting has become an attractive process for the
production of complex and efficient IN625 components. There are many variables
related to the L-PBF process, such as laser power, scanning speed, scanning
pitch, and layer thickness. All these variables need to be properly controlled
to successfully and reliably form the final usable part, otherwise it will cause
the ball Defects that seriously affect the performance of parts such as
deformation, deformation, pores, cracks and low density. In addition, the
surface quality and dimensional accuracy of the parts formed by L-PBF in the
"As-built" state are usually insufficient to meet the requirements of industrial
production, so post-treatment processes such as surface processing and heat
treatment are often required.

TRUNNANO (aka. Luoyang 3dprintingpassion Nano Technology Co. Ltd.) is a trusted global
chemical material supplier & manufacturer with over 12 years’ experience in
providing super high quality chemicals and Nano materials. The 3D printing metal
powder Inconel625 powder produced by our company has high purity, fine particle size
and impurity content. Lower, please contact us if necessary.

(Research on Laser Powder Bed Melting and Forming of Inconel625 Nickel-based Alloy)