Improvement of efficiency in the LPBF process and expansion of the processable powder materials by means of a vibration-excited powder spreading tool

  Original powder application tool and vibration excited powder application tool Copyright: © IWM

Contact

Siyuan Qin © Copyright: IWM

Name

Siyuan Qin

Group Process Technology

Phone

work
+49 241 80 99547

Email

E-Mail
 

Motivation

Due to the high demands on flowability, only the gas-atomized powder is feasible for the LPBF process. However, the most commonly used atomisation method for the production of powder materials is water atomisation, which has a significantly lower price (up to 50%) than gas atomisation method. Besides, the powder spreading process influences the LPBF processing time and the quality of final components. In this project, a powder spreading tool will be developed to realize the usage of water atomized powder for LPBF process.

Objectives

  • The development of a prototype of an ultrasonically simulated powder wiper
  • The improvement of powder spreading speed by 2-3 times for conventional gas-atomized 316L powder with the utilization of the ultrasonically simulated powder wiper
  • The feasibility of processing the water atomized 316L powder with poor flowability without reducing the density and mechanical properties of the produced parts
  • The increasing the efficiency of the LPBF process through a combination of increased powder spreading speed and the processability of more cost-effective, water-atomised powder materials

Project contents

  • Development of ultrasonically stimulated powder spreading unit and modification of test stand for coating quality
  • Processing of powder under a variation of powder spreading and process parameters
  • Microstructure characterisation and mechanical properties determination
  • Transfer of the ultrasonically stimulated powder coater to a commercial LPBF system and construction of a demonstrator

Project partner

  • Fraunhofer ILT Aachen
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Grant Number: 21573 N