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

2020-09-03 15:29:58  News

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.

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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 Tongrun 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.


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