Filler metals, brazing processing and reliability for diamond tools brazing: A review

Zhang, Liang

doi:10.1016/j.jmapro.2021.04.015

Cited by 62 publications

(13 citation statements)

References 89 publications

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“…There are many different alternative techniques capable of achieving a better level of metal-to-diamond bonding to overcome these problems nowadays, such as: the molten salt method [15], chemical vapor deposition [16], plasma spray [17], spark plasma sintering [18], hot isostatic pressing [19], and laser brazing methods [20], which have been employed in the manufacture of different metal-bonded diamond abrasive tools with different results. Among them, brazing technologies have evolved much more than the others because of the use of filler alloys with active carbide elements such as molybdenum [21], tungsten [22], chromium [20], and titanium [23], which make it possible to establish chemical and metallurgical bonds between the brazed diamond particles and the self-sharpening metal matrix, much more resistant than those developed by purely mechanical, adhesive, and diffusion means [24,25]. Moreover, the nucleation of these carbides at the surface of the diamond particles prevents their graphitization and/or oxidation [26] during the compaction and sintering process of the powders [27].…”

Section: Introductionmentioning

confidence: 99%

Manufacture and mechanical-tribological assessment of diamond-reinforced Cu-based coatings for cutting/grinding tools

Frutos

Richhariya

Silva

et al. 2023

Tribology International

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Section: Introductionmentioning

confidence: 99%

Manufacture and mechanical-tribological assessment of diamond-reinforced Cu-based coatings for cutting/grinding tools

Frutos

Richhariya

Silva

et al. 2023

Tribology International

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“…There are many kinds of diamond tools, including bonded diamond grits, CVD diamond, loose diamond abrasives, poly crystal diamonds, single crystal diamond, etc. [ 1 , 2 , 3 , 4 ]. Among them, the application amount of metal-bonded diamond tools prepared by powder metallurgy is the largest [ 5 ].…”

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

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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.

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“…During the grinding process, the grinding wheels play the crucial role in obtaining a high quality ground surface. Conventional grinding wheels primarily include electroplated wheels, sintered wheels, and resinoid bonded wheels [3]. However, the abrasive grains on these wheels are bonded mechanically, which have low holding strength and low chip storage space.…”

Section: Introductionmentioning

confidence: 99%

Phase transformation and deformation of the high-frequency induction brazed grinding wheel based on multi-field coupling

Wang

Hou

et al. 2023

Int J Adv Manuf Technol

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With the characteristic of the high bonding strength to matrix, good sharpness and large chip-storage spaces, the brazed super abrasive grinding wheels have superiorities in the machining of di cult-tomachine materials. However, thermal deformation is caused by the high temperature during the brazing process, leading the accuracy of the brazed grinding wheel degraded greatly. By means of local heating, high frequency induction brazing can reduce the thermal deformation of the wheel. Aiming at the thermal deformation mechanism of the induction brazed wheel, a numerical simulation model of thermal-stressphase multi-eld coupling was established considering the temperature dependent physical properties of the material. The simulation result indicated that the phase transformation occurred near the work surface of the wheel substrate. The depth of phase transformation layer decreased from 6.0 mm to 2.9 mm with the scanning speed increasing from 0.5 mm/s to 2.0 mm/s. Microstructure of the phase transformation layer mainly consisted of ferrite, pearliten and bainite after brazing. An appropriate scanning speed was more important for the high accuracy of the wheel substrate during the induction brazing, since it had remarkable in uence on the stress and deformation than brazing temperature. The experimental results of the microstructure morphology and deformation proved that the numerical simulation model was correct with 10.4% error.

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Filler metals, brazing processing and reliability for diamond tools brazing: A review

Cited by 62 publications

References 89 publications

Manufacture and mechanical-tribological assessment of diamond-reinforced Cu-based coatings for cutting/grinding tools

Manufacture and mechanical-tribological assessment of diamond-reinforced Cu-based coatings for cutting/grinding tools

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

Phase transformation and deformation of the high-frequency induction brazed grinding wheel based on multi-field coupling

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