Hardness and Surface Roughness Study of Steel Part Produced by Additive Technology

Monková, Katarína; Monka, Peter; Mandulak, Dusan

doi:10.12783/dtetr/tmcm2017/12667

Cited by 2 publications

(1 citation statement)

References 8 publications

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“…For maraging steel 1.2709, Monkava et al [118] found a correlation between the base surface roughness and hardness for various orientations for an angled DMLS printed cubic part. In this study, the printed wall varied, with an angle range from 37 • to 60 • , with four specific testing areas.…”

Section: Stainless Steelsmentioning

confidence: 99%

Tribological Properties of Additive Manufactured Materials for Energy Applications: A Review

2020

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Recently, additive manufacturing (AM) has gained much traction due to its processing advantages over traditional manufacturing methods. However, there are limited studies which focus on process optimization for surface quality of AM materials, which can dictate mechanical, thermal, and tribological performance. For example, in heat-transfer applications, increased surface quality is advantageous for reducing wear rates of vibrating tubes as well as increasing the heat-transfer rates of contacting systems. Although many post-processing and in situ manufacturing techniques are used in conjunction with AM techniques to improve surface quality, these processes are costly and time-consuming compared to optimized processing techniques. With improved as-built surface quality, particles tend to be better fused, which allows for greater wear resistance from contacting tube surfaces. Additionally, improved surface quality can reduce the entropy and exergy generated from flowing fluids, in turn increasing the thermodynamic efficiency of heat-transferring devices. This review aims to summarize the process-optimizing methods used in AM for metal-based heat exchangers and the importance of as-built surface quality to its performance and long-term energy conservation. The future directions and current challenges of this field will also be covered, with suggestions on how research in this topic can be improved.

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Section: Stainless Steelsmentioning

confidence: 99%

Tribological Properties of Additive Manufactured Materials for Energy Applications: A Review

2020

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Effect of Hardening Temperature on Maraging Steel Samples Prepared by Direct Metal Laser Sintering Process

et al. 2023

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This paper deals with the application of the direct metal laser sintering (DMLS) process, which already has a dominant position in the area of additive manufacturing (AM). This DMLS technology is used in many branches of industry and medicine, especially in piece production, small series, and prototypes. The portfolio of used metal powder materials includes aluminum alloys, austenitic steels, maraging steels, special alloys of nickel and titanium. The properties of these products are very often improved by further heat treatment after printing, such as a hardening process, by which microstructure and hardness can be increased. Heat treatment processes of metal AM components are already described, but experiments focused on optimization of these processes are still missing. In the article, the maraging steel samples printed by the DMLS method are subjected to testing after hardening processes, which differ by reducing the maintaining time at a defined temperature, recommended by the manufacturer. The result of the evaluation will be the reaching of similar results, which are set by the powder manufacturer, however, with shorter time of samples treatment. Therefore, the elevated temperature is selected, with the purpose of monitoring the shortest possible time of a temperature impact. The experimental temperature was set 590 °C with different durations at this temperature, for 1, 2, 3, 4, 5 and 6 h. The cooling process runs controlled in the furnace or in the still air. The maintaining time proved to be the most ideal already at 1 h exposure and cooled in the still air, where a higher hardness value of around 50 HRC was reached. During the resulting microstructure evaluations, fine carbids and martensitic lamellae were observed. More uniform and finer lamellar microstructure occurred at 5 and 6 h temperature intervals.

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Hardness and Surface Roughness Study of Steel Part Produced by Additive Technology

Cited by 2 publications

References 8 publications

Tribological Properties of Additive Manufactured Materials for Energy Applications: A Review

Tribological Properties of Additive Manufactured Materials for Energy Applications: A Review

Effect of Hardening Temperature on Maraging Steel Samples Prepared by Direct Metal Laser Sintering Process

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