Copper–nickel-based diamond cutting tools: stone cutting evaluation

Henriques, Bruno; Ferreira, Pedro Eduardo; Buciumeanu, M.; Fredel, Márcio C.; Cabral, A.; Silva, Filipe; Miranda, G.

doi:10.1007/s00170-017-0220-6

Cited by 16 publications

(4 citation statements)

References 22 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Additionally, some sintering aids need to be added [ 20 ]. Cu-Sn alloy is a widely used solder material with a low melting point and good metal wettability [ 21 , 22 ], so it is also used as a sintering aid for diamond tools.…”

Section: Introductionmentioning

confidence: 99%

Effect of Cu-Sn Addition on Corrosion Property of Pressureless Sintered Fe-Cu-Co Substrate Alloys

Tao

Chen

et al. 2023

Materials

View full text Add to dashboard Cite

Fe-Cu-Co prealloyed powder is used for bonding metal of diamond tools. In order to obtain diamond tools with good mechanical properties by pressureless sintering, it is necessary to add Cu-Sn sintering aids. The substrate also has high corrosion resistance requirements, which is conducive to the chemical erosion of diamond tools. This paper mainly studies the effects of Cu-Sn on the corrosion behavior of pressureless sintered Fe-Cu-Co substrate. The results show that the linear contraction rate and relative density of pressureless sintered Fe-Cu-Co alloy at 875 °C reach their peak when the Cu-Sn content is 8 wt.%, 15.13% and 97.5%, respectively. The substrate is mainly composed of α-Fe and Cu-rich phases, and selective corrosion occurs during electrochemical corrosion; namely, α-Fe grains are more prone to corrosion than Cu-rich grains to form porous corrosion surfaces. With the increase in Cu-Sn addition, the volume fraction of the Cu-rich phase increases, the corrosion current density and the passive current density gradually decrease, and the corrosion resistance of the alloy is improved. The amount and integrity of anodic passive film on the Fe-Cu-Co surface increases with the increase in Cu-Sn addition. The oxygen content of the anodic passivation film is lower than that of the active corrosion products of the α-Fe phase, thus reducing the oxygen concentration gradient and slowing down the corrosion. The addition of Cu-Sn is conducive to improving the corrosion resistance of Fe-Cu-Co alloy as the substrate of diamond tools.

show abstract

Section: Introductionmentioning

confidence: 99%

Effect of Cu-Sn Addition on Corrosion Property of Pressureless Sintered Fe-Cu-Co Substrate Alloys

Tao

Chen

et al. 2023

Materials

View full text Add to dashboard Cite

show abstract

“…13 However, Co high toxicity reduced availability, and price instability 14 has set the tone for the search of alternative binder materials or materials with lower Co content for cutting tools. 15–17 However, these materials need to impart to the tool the necessary mechanical and wear resistance under in-service conditions.…”

Section: Introductionmentioning

confidence: 99%

“…11,12 There are evidences in previous studies that when using adequate processing, cobalt presents a good compatibility with CBN, guaranteeing that no phase transformation into hexagonal boron nitride (owing lower hardness) occurs, with especial attention needed regarding temperature, that must be kept lower than 1300 C. 13 However, Co high toxicity reduced availability, and price instability 14 has set the tone for the search of alternative binder materials or materials with lower Co content for cutting tools. [15][16][17] However, these materials need to impart to the tool the necessary mechanical and wear resistance under in-service conditions.…”

Section: Introductionmentioning

confidence: 99%

“…Hot pressing (HP) technique makes use of temperature and pressure simultaneously in order to sinter a metallic matrix free of porosity, usually attaining a high level of densification. [15][16][17][18] HP allows a strict control of the temperatures achieved, a fact that together with an accurate control of the sintering time allows avoiding grain growth, thus enhancing the mechanical properties of the material.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Mechanical and tribological performance of Ni–Co-based binders for cubic boron nitride cutting tools

Miranda

Guimarães

Pereira

et al. 2020

Journal of Composite Materials

View full text Add to dashboard Cite

Cubic boron nitride is becoming an alternative cutting tool material for machining under demanding conditions, displaying superior wear performance and machined parts with higher quality. The current need to reduce the cobalt content in these tools led to this study and focused on alternative binder materials for cubic boron nitride cutting tools. This work addresses several nickel–cobalt-based materials, regarding their microstructure, mechanical (hardness and shear strength), and tribological performance. The best results were attained when adding tungsten carbide to nickel–cobalt, once nickel–cobalt–tungsten carbide was found to display the higher mechanical properties, together with the higher wear resistance.

show abstract