Additive Manufacturing of Tungsten Carbide Hardmetal Parts by Selective Laser Melting (SLM), Selective Laser Sintering (SLS) and Binder Jet 3D Printing (BJ3DP) Techniques

Natural and synthetic rubber is gaining increased interest in various industrial applications and daily life sectors (automotive industry, acoustic and electrical isolators, adhesives, impermeable surfaces, and others) due to its remarkable physicomechanical properties, excellent durability, and abrasive resistance. These great characteristics are accompanied by some recycling difficulties of the final products, particularly originated from the tire waste rubber industry. In this study, recycled tire rubber was incorporated in polymer matrices using selective laser sintering as 3D printing technology. Two polymers were used-polyamide and thermoplastic polyurethane, for their rigid and elastomeric properties, respectively. Polymer composites containing various tire powder amounts, up to 40 wt.%, were prepared by physical blending. The final materials’ morphological characteristics, mechanical properties, and thermal stability were evaluated. The proposed ambitious additive manufacturing approach looked over also some of the major aspects to be considered during the 3D printing procedure. In addition, examples of printed prototypes with potential applications were also proposed revealing the potential of the recycled tire rubber-loaded composites.

Download Full-text

Binding mechanisms in selective laser sintering and selective laser melting

Rapid Prototyping Journal ◽

10.1108/13552540510573365 ◽

2005 ◽

Vol 11 (1) ◽

pp. 26-36 ◽

Cited By ~ 630

Author(s):

J‐P. Kruth ◽

P. Mercelis ◽

J. Van Vaerenbergh ◽

L. Froyen ◽

M. Rombouts

Keyword(s):

Selective Laser Melting ◽

Selective Laser Sintering ◽

Laser Sintering ◽

Laser Melting ◽

Binding Mechanisms

Download Full-text

3D printing of Aluminium alloys: Additive Manufacturing of Aluminium alloys using selective laser melting

Progress in Materials Science ◽

10.1016/j.pmatsci.2019.100578 ◽

2019 ◽

Vol 106 ◽

pp. 100578 ◽

Cited By ~ 119

Author(s):

Nesma T. Aboulkhair ◽

Marco Simonelli ◽

Luke Parry ◽

Ian Ashcroft ◽

Christopher Tuck ◽

...

Keyword(s):

Additive Manufacturing ◽

3D Printing ◽

Selective Laser Melting ◽

Aluminium Alloys ◽

Laser Melting

Download Full-text

Direct Selective Laser Sintering of WC-Co Cemented Carbide by Premixing of Additives

ASME/ISCIE 2012 International Symposium on Flexible Automation ◽

10.1115/isfa2012-7182 ◽

2012 ◽

Cited By ~ 1

Author(s):

Hideki Kyogoku ◽

Takeshi Uemori ◽

Akihiko Ikuta ◽

Kenichi Yoshikawa ◽

Hitoshi Ohmori

Keyword(s):

Selective Laser Melting ◽

Laser Power ◽

Smooth Surface ◽

Laser Scanning ◽

Selective Laser Sintering ◽

Laser Sintering ◽

Cemented Carbides ◽

Sintering Process ◽

Laser Melting ◽

Scan Speed

In this study, the fabrication conditions of WC cemented carbides by direct selective laser melting were investigated. The effects of additives, such as Co, Cu-20%Sn and Cu powders, and laser scanning conditions on laser sintering process were examined to fabricate a sound laser-scanned body of WC cemented carbides. The optimum laser power, scan speed and scan pitch were found out by experiments. It was found that the continuously smooth single-scan track can be obtained at a lower laser power and a higher scan speed by the addition of 30% Cu powder. The smooth surface of the laser-scanned body could be fabricated at a laser power of 9 W, a scan speed of 20 mm/s and a scan pitch of 0.05 mm.

Download Full-text