scholarly journals Selective Laser Melting of Crack-Free High Density M2 High Speed Steel Parts by Baseplate Preheating

2014 ◽  
Vol 136 (6) ◽  
Author(s):  
Karolien Kempen ◽  
Bey Vrancken ◽  
Sam Buls ◽  
Lore Thijs ◽  
Jan Van Humbeeck ◽  
...  
Keyword(s):  
Additive Manufacturing ◽  
Selective Laser Melting ◽  
High Speed ◽  
Crack Formation ◽  
High Speed Steel ◽  
Thermal Gradients ◽  
Laser Melting ◽  
Mechanical And Physical Properties ◽  
The World ◽  
M2 High Speed Steel

Cracks and delamination, resulting from residual stresses, are a barrier in the world of additive manufacturing and selective laser melting (SLM) that prohibits the use of many metals in this field. By preheating the baseplate, thermal gradients are lowered and stresses can be reduced. In this work, some initial tests were performed with M2 high speed steel (HSS). The influence of preheating on density and mechanical and physical properties is investigated. The paper shows many promising results for the production of SLM parts in materials that are very sensitive to crack formation and delamination. When using a preheating of 200 °C, crack-free M2 HSS parts were produced with a relative density of 99.8%.

scholarly journals Effects of Heat Treatment Temperature on Microstructure and Mechanical Properties of M2 High-Speed Steel Selective Laser Melting Samples

2020 ◽  
Author(s):  
Huan Ding ◽  
Xiong Xiang ◽  
Rutie Liu ◽  
Jie Xu
Keyword(s):  
Heat Treatment ◽  
Flexural Strength ◽  
Selective Laser Melting ◽  
Heat Treatment Temperature ◽  
High Speed ◽  
High Speed Steel ◽  
Treatment Temperature ◽  
Laser Melting ◽  
Average Value ◽  
M2 High Speed Steel

At different heat treatment temperatures, the hardness and flexural strength of M2 high-speed steel selective laser melting (SLM) parts show mixed trends. When the heat treatment temperature is 260°C, the hardness and flexural strength of the M2 high-speed steel SLM part are decreased, but the hardness difference between the upper and lower surfaces of the M2 high-speed steel SLM part is also reduced. When the heat treatment temperature is 560°C, the hardness and flexural strength of the M2 high-speed steel SLM part are almost close to that of the original M2 high-speed steel SLM part, and the performance gradient in the sample is improved, and the overall structure is uniform. When the subsequent heat treatment temperature is 860 °C, the hardness of the SLM parts reaches a minimum, with an average value of 24 HRC. However, the flexural strength exceeds that of the original SLM parts. Moreover, the microstructure of the sample is uniform, which significantly improves the anisotropy of performance.

scholarly journals Design Rules for Hybrid Additive Manufacturing Combining Selective Laser Melting and Micromilling

Materials ◽  
2021 ◽  
Vol 14 (19) ◽  
pp. 5753
Author(s):  
David Sommer ◽  
Babette Götzendorfer ◽  
Cemal Esen ◽  
Ralf Hellmann
Keyword(s):  
Additive Manufacturing ◽  
Selective Laser Melting ◽  
High Speed ◽  
Hybrid Approach ◽  
Laser Melting ◽  
Support Design ◽  
Design Rules ◽  
Geometrical Accuracy ◽  
Design Engineers ◽  
A Charge

We report on a comprehensive study to evaluate fundamental properties of a hybrid manufacturing approach, combining selective laser melting and high speed milling, and to characterize typical geometrical features and conclude on a catalogue of design rules. As for any additive manufacturing approach, the understanding of the machine properties and the process behaviour as well as such a selection guide is of upmost importance to foster the implementation of new machining concepts and support design engineers. Geometrical accuracy between digitally designed and physically realized parts made of maraging steel and dimensional limits are analyzed by stripe line projection. In particular, we identify design rules for numerous basic geometric elements like walls, cylinders, angles, inclinations, overhangs, notches, inner and outer radii of spheres, chamfers in build direction, and holes of different shape, respectively, as being manufactured by the hybrid approach and compare them to sole selective laser melting. While the cutting tool defines the manufacturability of, e.g., edges and corners, the milling itself improves the surface roughness to Ra < 2μm. Thus, the given advantages of this hybrid process, e.g., space-resolved and custom-designed roughness and the superior geometrical accuracy are evaluated. Finally, we exemplify the potential of this particular promising hybrid approach by demonstrating an injection mold with a conformal cooling for a charge socket for an electro mobile.

Laser additive manufacturing of M2 high-speed steel

2017 ◽  
Vol 34 (1) ◽  
pp. 69-78 ◽  
Author(s):  
Min Zhang ◽  
Changjun Chen ◽  
Lanlan Qin ◽  
Kai Yan ◽  
Guangping Cheng ◽  
...  
Keyword(s):  
Additive Manufacturing ◽  
High Speed ◽  
High Speed Steel ◽  
Laser Additive Manufacturing ◽  
M2 High Speed Steel

Rapid solidification of M2 high-speed steel by laser melting

2009 ◽  
Vol 30 (3) ◽  
pp. 674-678 ◽  
Author(s):  
K.Y. Benyounis ◽  
O.M. Fakron ◽  
J.H. Abboud
Keyword(s):  
Rapid Solidification ◽  
High Speed ◽  
High Speed Steel ◽  
Laser Melting ◽  
M2 High Speed Steel
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