Research Progress in Laser Powder Bed Melting Forming of Inconel625 Nickel-based Alloy Powder

(Research Progress in Laser Powder Bed Melting Forming of Inconel625 Nickel-based Alloy Powder)

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

For metals, laser powder bed melting (LPBF) mainly uses high-energy laser
beams to melt preset thin layers of metal powder layer by layer, which can form
high-performance parts after solidification and cooling. It is one of the most
promising additive manufacturing technologies. One. This technology is
especially suitable for the forming and processing of small-batch,
high-precision, personalized, and complex structure parts. It has a wide range
of application prospects in aerospace, biomedical, automotive, abrasive tools
and other fields.

Inconel 625 (IN625) is a nickel-based superalloy. It mainly uses the reliable
solution strengthening effect of elements such as molybdenum (Mo) and niobium
(Nb) in the Ni-Cr matrix to obtain high-temperature strength and creeps
resistance. The corrosion resistance and solderability in the environment are
also acceptable. However, due to its high hardness, low thermal conductivity and
high work hardening rate, IN625 is considered to be an alloy that is difficult
to process or is difficult to manufacture with subtractive materials. During the
machining process, the machine tool wears quickly, and this material Or it isn't
easy to control its performance during forging.

As an essential additive manufacturing technology, LPBF provides enormous
potential for the production of complex parts. The current research on LPBF
forming IN625 alloy mainly focuses on adjusting its structure and properties by
changing process parameters and subsequent heat treatment. Because the LPBF
process involves complex issues such as metallurgy, physics, chemistry, and
thermal coupling, and the matching relationship between process parameters is
very complicated, the current IN625 LPBF process parameters are not yet mature.
For example, there is often sizeable residual stress in the sample, which leads
to cracks. Holes, cracks, inclusions and other defects often appear between
layers.

Due to the texture in the LPBF-IN625 alloy, the performance anisotropy of the
sample often appears, but sometimes the performance difference between the
forming surfaces is not ideal. Besides, non-equilibrium solidification leads to
a significant increase in the stable solution limit of the alloy elements in the
base metal, making the performance of LPBF parts different from traditional bulk
materials. So far, the research on the LPBF of IN625 has mainly focused on the
microhardness and tensile properties. At the same time, there are few studies on
other important properties such as high-temperature tensile strength, corrosion
resistance, and creep properties.

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 Nanomaterials. The 3D printing metal
powder produced by our company has high purity, sufficient particle size and
impurity content. Lower, please contact us if necessary.

(Research Progress in Laser Powder Bed Melting Forming of Inconel625 Nickel-based Alloy Powder)