Powder Characterization and Material Properties of 18Ni300 Recycled PBF-LB/M Scrap by Ultrasonic Atomization
Powder Characterization and Material Properties of 18Ni300 Recycled PBF-LB/M Scrap by Ultrasonic Atomization
Agnieszka Łagoda(Opole University of Technology); Andrzej Pawlak(Wroclaw University of Science and Technology); Andrzej Kurek(Opole University of Technology); Kevin Moj(Opole University of Technology); Szymon Lis(Opole University of Technology)
12권 5호, 1411~1427쪽
초록
High metal powder properties play a crucial role in additive manufacturing. This guarantees high quality final prints free from defects such as keyholes, material inclusions or pores. The technique of obtaining powders is widely used by water and gas atomization. However, there is another method, ultrasonic atomization, whose principle have been known for more than a century, but its application in the production of metallic powders has only been possible in recent years. In this study, 8 kg of waste, scrap and failed prints fabricated from maraging steel 18Ni300 powder directly from the manufacturer were ultrasonically atomized. 4 kg of powder fraction suitable for additive manufacturing were obtained. Powder morphology, chemical composition, grain shape and particle size distribution were examined. The ultrasonic atomized powder turned out to be higher quality than commercial powder—it is more spherical, without visible satellites, and uniform. It also does not have pores in the section of the particle, which were noticed in the powder from the manufacturer. However, tungsten was found in its chemical composition, but the strength and hardness of the final prints were also tested and the results show that the tungsten content does not affect the mechanical properties of printed elements. The ultrasonic atomization proved to be a promising method for metal recycling technology and the production of new powders for additive manufacturing, although small deviations of the atomized powder from the powder purchased from the manufacturer.
Abstract
High metal powder properties play a crucial role in additive manufacturing. This guarantees high quality final prints free from defects such as keyholes, material inclusions or pores. The technique of obtaining powders is widely used by water and gas atomization. However, there is another method, ultrasonic atomization, whose principle have been known for more than a century, but its application in the production of metallic powders has only been possible in recent years. In this study, 8 kg of waste, scrap and failed prints fabricated from maraging steel 18Ni300 powder directly from the manufacturer were ultrasonically atomized. 4 kg of powder fraction suitable for additive manufacturing were obtained. Powder morphology, chemical composition, grain shape and particle size distribution were examined. The ultrasonic atomized powder turned out to be higher quality than commercial powder—it is more spherical, without visible satellites, and uniform. It also does not have pores in the section of the particle, which were noticed in the powder from the manufacturer. However, tungsten was found in its chemical composition, but the strength and hardness of the final prints were also tested and the results show that the tungsten content does not affect the mechanical properties of printed elements. The ultrasonic atomization proved to be a promising method for metal recycling technology and the production of new powders for additive manufacturing, although small deviations of the atomized powder from the powder purchased from the manufacturer.
- 발행기관:
- 한국정밀공학회
- 분류:
- 기계공학