Possibilities of Manufacturing Products from Cermet Compositions Using Nanoscale Powders by Additive Manufacturing Methods

Abstract

Complicated wear-resistant parts made by selective laser melting (SLM) of powder material based on compositions of metal and ceramics can be widely used in mining, oil engineering, and other precision engineering industries. Ceramic–metal compositions were made using nanoscale powders by powder metallurgy methods. Optimal regimes were found for the SLM method. Chemical and phase composition, fracture toughness, and wear resistance of the obtained materials were determined. The wear rate of samples from 94 wt% tungsten carbide (WC) and 6 wt% cobalt (Co) was 1.3 times lower than that of a sample from BK6 obtained by the conventional methods. The hardness of obtained samples 2500 HV was 1.6 times higher than that of a sample from BK6 obtained by the traditional method (1550 HV).

Additive manufacturing of WC-Co hardmetals: a review

“…In addition, the wear rate of the conventional sample was 1.3 times that of the nanopowder manufacturing sample. The fracture toughness of the nano powder sample is only 6.9 MPa m 1/2 , which is lower than the 8.9 MPa m 1/2 of the conventional powder sample [31].…”

“…The WC grain size in the sample prepared from the nanostructured powder can reach 180 ± 50 nm, which is much smaller than the 330 ± 100 nm in conventional powder manufacturing samples [69]. Small grain size can bring high hardness and high wear resistance, but low toughness [31,78]. The hardness of the nano-powder manufacturing sample can reach 2500 HV 0.05 , which is much higher than the 1550 HV 0.05 of the conventional sample.…”

“…Additive manufacturing (AM) process has emerged as an alternative to traditional manufacturing processes that can Yankun Yang and Chaoqun Zhang contributed equally to this work. fabricate very complicated geometries with high efficiency and low cost [29][30][31][32][33][34][35]. Therefore, more and more attention have been paid to additive manufacturing of WC-Co hardmetals.…”

Influence of Postprocessing on Wear Resistance of Aerospace Steel Parts Produced by Laser Powder Bed Fusion

“…The direct laser manufacturing of the proposed complex parts from the powder takes their production to a new level [52][53][54] since it allows direct production of the parts from the powder layer-by-layer on a substrate in a vacuum chamber or in a chamber with a neutral atmosphere [55][56][57][58] by selective remelting of granules with a coherent and monochrome light beam [59,60]. Laser powder bed fusion was carried out on an EOS M280 industrial unit (EOS GmbH, Krailling, Germany) and an ALAM experimental setup (MSTU Stankin, Moscow, Russia) [61][62][63] equipped with the laser source of continuous radiation LK-200 (IPG LASER GMBH, Fryazino, Russia) with a wavelength of 1070 nm, a beam divergence of 0.2 • , and maximum power of 200 W. Corrosion-resistant steel of the martensitic class, grade 20Kh13 (DIN 1.4021), and corrosion-resistant chromium-nickel steel of the austenitic class, grade12Kh18N9T (DIN 1.4541), were chosen for additive production.…”

Ti(C,N) and WC-Based Cermets: A Review of Synthesis, Properties and Applications in Additive Manufacturing

“…The first research on the laser sintering of tungsten carbide-cobalt was carried out at the University of Leuven in Belgium [118]. Cemented WC materials are ideal for SLM processing due to the lower melting temperature of the binder phase compared to the melting temperature of WC (2870 °C) [119]. Khmyrov et al changed the WC/Co ratio to study cracking.…”