Defect Control of the WC Hardmetal by Mixing Recycled WC Nano Powder and Tungsten Powder

Hur, Man Gyu; Shin, Mi Kyung; Kim, Deug Joong; Yoon, Dae Ho

doi:10.1007/s12540-018-0043-5

Cited by 4 publications

(2 citation statements)

References 19 publications

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“…Tungsten carbide (WC), which contains cemented carbides, has attracted considerable attention owing to its high hardness, high elastic modulus, and wear resistance properties. 1) Cobalt, a typical binder material, improves the wettability of conventional cemented carbides and possess excellent sintering properties. 2,3) However, cobalt materials face certain disadvantages, including high cost and environmental pollution; thus, a new metal binder is required to replace them.…”

Section: Introductionmentioning

confidence: 99%

Improvement in Mechanical Properties of Cryogenically Treated WC-5 wt% NbC Hard Materials Sintered by Pulsed Current Activated Sintering

Lee¹,

Park²,

Park³

2022

Korean. J. Mater. Res.

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Recently, the necessity of designing and applying tool materials that perform machining of difficult-to-cut materials in a cryogenic treatment where demand is increasing. The objective of this study is to evaluate the performance of cryogenically treated WC-5 wt% NbC hard materials fabricated by a pulsed current activated sintering process. The densely consolidated specimens are cryogenically exposed to liquid nitrogen for 6, 12, and 24 h. All cryogenically treated samples exhibit compressive stress in the sintered body compared with the untreated sample. Furthermore, a change in the lattice constant leads to compressive stress in the specimens, which improves their mechanical performance. The cryogenically treated samples exhibit significant improvement in mechanical properties, with a 10.5 % increase in Vickers hardness and a 60 % decrease in the rupture strength compared with the untreated samples. However, deep cryogenic treatment of over 24 h deteriorates the mechanical properties indicating that excessive treatment causes tensile stress in the specimens. Therefore, the cryogenic treatment time should be controlled precisely to obtain mechanically enhanced hard materials.

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Section: Introductionmentioning

confidence: 99%

Improvement in Mechanical Properties of Cryogenically Treated WC-5 wt% NbC Hard Materials Sintered by Pulsed Current Activated Sintering

Lee¹,

Park²,

Park³

2022

Korean. J. Mater. Res.

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“…It is determined that as the selective corrosion occurred at the center of the dendritic matrix with the formation of pits rather than in the eutectic mixture, which seems to be preserved [8]. It is determined that the addition of tungsten metal powder in the range from 8 wt.% to 12 wt.% resulted in a linear increase in the density and hardness of the tungsten carbide hard metals [9].…”

Section: Introductionmentioning

confidence: 99%

Production and characterization of boron carbide and silicon carbide reinforced copper‐nickel composites by powder metallurgy method

Akkaş

2021

Materialwissenschaft Werkst

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In this study, composite samples were produced by reinforcing boron carbide and silicon carbide particles in different rates by weight into copper‐nickel powder mixture using powder metallurgy method. The prepared powder mixtures were cold pressed under 600 MPa pressure and pelletized. The pelletized samples were then sintered in an atmosphere‐controlled furnace. Scanning electron microscopy to determine the microstructure of the produced samples and x‐ray diffraction method analysis to determine the phases forming in the structure of the produced samples were used and microhardness was taken to determine the effect of boron carbide and silicon carbide on hardness. In addition to that, the mechanical properties the transverse rupture strength were investigated using three‐point bending tests. The corrosion tests were performed potentiodynamic polarization curves of the samples in 3.5 % sodium chloride solution. The highest hardness value was measured as 162 HV 0.05 in the sample reinforced with 10 % boron carbide. As the amount of silicon carbide increased, the corrosion resistance of the composite increased. Moreover, as the amount of boron carbide increased, the corrosion resistance of the composite decreased. Load‐contact depth values were examined, copper‐nickel+10 % silicon carbide has the highest peak depth of 48.12.

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Influence of Microstructure Evolution on Mechanical Properties, Wear Resistance and Corrosion Resistance of Ti(C,N)-Based Cermet Tools with Various WC Additions

et al. 2020

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Defect Control of the WC Hardmetal by Mixing Recycled WC Nano Powder and Tungsten Powder

Cited by 4 publications

References 19 publications

Improvement in Mechanical Properties of Cryogenically Treated WC-5 wt% NbC Hard Materials Sintered by Pulsed Current Activated Sintering

Improvement in Mechanical Properties of Cryogenically Treated WC-5 wt% NbC Hard Materials Sintered by Pulsed Current Activated Sintering

Production and characterization of boron carbide and silicon carbide reinforced copper‐nickel composites by powder metallurgy method

Influence of Microstructure Evolution on Mechanical Properties, Wear Resistance and Corrosion Resistance of Ti(C,N)-Based Cermet Tools with Various WC Additions

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